Bicycle Derailleur and Method

A front derailleur for use on devices such as bicycles is movable about a yaw axis while it moves laterally. The front derailleur may include a linkage in between a mount and a cage, with the linkage pivoting about two non-parallel axes. The front derailleur may include a linkage in between the mount and the cage that has links of different effective lengths. The front derailleur may include a single link and a cam.

Bicycle front derailleur body and device for adjustable rest of such derailleur body on a tube of a bicycle frame

A device for connecting a front derailleur to the front tube of a bicycle. The device is fixed to the derailleur and the front tube at a predetermined position and includes an adjustable rest for contacting the front tube and positioning the derailleur.

Automatic transmission for a bicycle

The present invention relates to an automatic transmission for a bicycle, including: a front sprocket unit coupled to pedals; a rear sprocket unit mounted to a rear wheel; and a drive chain, extremities of which are wound around one sprocket of the front sprocket unit and around one sprocket of the rear sprocket unit, respectively, whereby the torque and speed of the bicycle can be changed in accordance with the combination of the diameters of the sprockets. The front sprocket unit receives a rotating force, and rotates in a direction that propels a bicycle body having pedals forward, but does not receive a rotating force in a direction opposite the rotating direction. The automatic transmission of the present invention can automatically perform a gear-shifting operation without forcing a rider to work the pedals while riding, yet changing the torque and speed of the bicycle.

Front derailleur with frame support structure

A bicycle front derailleur that includes a chain guide configured to engage a bicycle chain and a mounting member operatively coupled to the chain guide. The mounting member includes a frame support structure that includes a contact member that is configured to contact the frame of the bicycle, and a support member mounted to the mounting member. The contact member is supported by the support member.

Derailleur Guide Device

The invention relates to a chain catcher used on multiple chainring arrangements on bicycles in combination with a derailleur to prevent the drive chain from slipping off the smallest chainring into the space between the chainring and the bicycle frame. The embodiment of a chain catcher according to the invention permits especially simple mounting and adjustment by using an additional fastening element. The corresponding method includes completion of the positioning, fastening, and adjustment of the derailleur before the chain catcher is installed.

BICYCLE DERAILLEUR

A bicycle derailleur is basically provided with a base member, a chain guide, a linkage assembly and a first adjusting member. The chain guide is pivotally supported with respect to the base member between a retracted and an extended position. The linkage assembly includes a first link coupled to the base member about a first pivot axis and coupled to the chain guide about a second pivot axis. The linkage assembly includes a second link coupling the base member to the chain guide. The second link is farther from the bicycle frame than the first link when the base member is mounted to the bicycle frame. The first adjusting member is movably attached to the first link. The first adjusting member is configured to contact one of the base member and the chain guide to restrict movement of the chain guide at one of the retracted and extended positions. 1. A bicycle derailleur comprising:a base member configured to be mounted to a bicycle frame;a chain guide pivotally supported with respect to the base member between a retracted position and an extended position that is farther from the bicycle frame than the retracted position;a linkage assembly including a first link pivotally coupled to the base member about a first pivot axis and pivotally coupled to the chain guide about a second pivot axis, and a second link pivotally coupling the base member to the chain guide, the second link being farther from the bicycle frame than the first link in a state where the base member is mounted to the bicycle frame; anda first adjusting member movably attached to the first link, the first adjusting member being configured to contact one of the base member and the chain guide to restrict a movement of the chain guide at one of the retracted position and the extended position of the chain guide.2. The bicycle derailleur according to claim 1 , whereinthe first adjusting member is disposed between the first and second pivot axes as viewed from a direction parallel to the first pivot axis. ...

Bicycle electric front derailleur

A bicycle electric front derailleur is disclosed that includes a support body that is configured to be attached to a frame of the bicycle, a chain guide connected to the support body through a linkage, an electric motor that drives the linkage to displace the chain guide among toothed wheels of a motion transmission system, and a battery power supply unit. The battery power supply unit is supported by the chain guide.

FRONT DERAILLEUR

A front derailleur is provided for mounting to a bicycle having a crank axis. The front derailleur is provided with a base member, a chain guide and a link mechanism. The base member is mounted on the bicycle for positioning in a predetermined adjustment direction. The chain guide guides the chain. The link mechanism movably couples the chain guide to the base member. The link mechanism includes a first link member pivotally arranged in relation to the base member about a first link axis and pivotally arranged in relation to the chain guide about a second link axis. The first link axis and the second link axis are arranged non-parallel and non-orthogonal to the predetermined adjustment direction when viewed from the axial direction of the crank axis in a state where the base member is mounted to the bicycle. 1. A front derailleur for mounting to a bicycle having a crank axis , the front derailleur comprising:a base member configured to be adjustably mounted on the bicycle in a predetermined adjustment direction;a chain guide configured to guide a chain; anda link mechanism movably coupling the chain guide to the base member, the link mechanism including a first link member pivotally arranged in relation to the base member about a first link axis and pivotally arranged in relation to the chain guide about a second link axis;the first link axis and the second link axis being arranged non-parallel and non-orthogonal to the predetermined adjustment direction when viewed from the axial direction of the crank axis in a state where the base member is mounted to the bicycle.2. The front derailleur according to claim 1 , wherein the first link axis and the second link axis are inclined in relation to the predetermined adjustment direction within a range of 30 degrees.3. The front derailleur according to claim 1 , wherein the first link axis and the second link axis are arranged parallel to each other.4. The front derailleur according to claim 1 , whereinthe link mechanism ...

FRONT DERAILLEUR

A front derailleur is attachable to a bicycle with a frame in which a fixing bore is provided. The front derailleur basically includes a base member, a chain guide and a link mechanism. The base member has an attaching bore for attaching the base member to a fixing bore of a frame by a fastening member. The chain guide configured to guide a chain. The link mechanism movably couples the chain guide to the base member. The base member is disposed with respect to the chain guide such that at least a part of the attaching bore is disposed in front of the chain guide and above the chain guide while the front derailleur is in a state in which the base member is attached to the frame. 1. A front derailleur for mounting to a bicycle , the front derailleur comprising:a base member having an attaching bore for attaching the base member to a fixing bore of a frame of the bicycle by a fastening member;a chain guide configured to guide a chain; anda link mechanism movably coupling the chain guide to the base member,the base member being disposed with respect to the chain guide such that at least a part of the attaching bore is disposed in front of the chain guide and above the chain guide while the front derailleur is in a state in which the base member is attached to the frame.2. The front derailleur according to claim 1 , whereinthe attaching bore is entirely disposed in front of the chain guide and above the chain guide while the front derailleur is in the state in which the base member is attached to the frame.3. A front derailleur for mounting to a bicycle claim 1 , the front derailleur comprising:a base member having an attaching bore for attaching the base member to a fixing bore of a frame of the bicycle by a fastening member;a chain guide configured to guide a chain; anda link mechanism movably coupling the chain guide to the base member, the link mechanism including a first link member pivotally arranged about a first link axis with respect to the base member and ...

BICYCLE DERAILLEUR

A bicycle derailleur has a base member, a movable member, a first link member and a second link member. The movable member is movable with respect to the base member between a retracted position and an extended position. The first link member includes a first connecting portion pivotally coupled to the movable member about a first pivot axis. The first link member is pivotally coupled to the base member about a second pivot axis. The second link member is pivotally coupled to the movable member about a third pivot axis. The second link member is pivotally coupled to the base member about a fourth pivot axis. The first connecting portion at least partially overlaps with the second link member as viewed in a direction parallel to the first pivot axis in a state in which the movable member is disposed at one of the retracted and extended positions. 1. A bicycle derailleur comprising:a base member configured to be attached to a bicycle;a movable member configured to be movable with respect to the base member between a retracted position and an extended position at which the movable member is farther from the base member than the retracted position;a first link member including a first connecting portion pivotally coupled to the movable member about a first pivot axis, the first link member being pivotally coupled to the base member about a second pivot axis; anda second link member pivotally coupled to the movable member about a third pivot axis, the second link member being pivotally coupled to the base member about a fourth pivot axis,the first connecting portion at least partially overlapping with the second link member as viewed in a direction parallel to the first pivot axis in a state in which the movable member is disposed at one of the retracted position and the extended position.2. The bicycle derailleur according to claim 1 , whereinthe first, second, third and fourth pivot axes are configured to be arranged relative to the base member such that the first and ...

CHAINGUIDE

A chainguide includes a mounting bracket and a guide member supported by and infinitely laterally adjustable relative to the mounting bracket. 1. A chainguide , comprising:a mounting bracket; anda guide member supported by and infinitely laterally adjustable relative to the mounting bracket.2. The chainguide of claim 1 , wherein the guide member includes non-shimmed lateral adjustment.3. The chainguide of claim 1 , wherein the guide member is infinitely laterally adjustable relative to the mounting bracket along an axis claim 1 , and the guide member is rotatable relative to the mounting bracket about the axis.4. The chainguide of claim 1 , wherein the guide member includes an outer guide and an inner guide providing a guide channel for a chain therebetween.5. The chainguide of claim 1 , further comprising:an expanding mandrel extended from the mounting bracket,the guide member slidably supported on the expanding mandrel.6. The chainguide of claim 5 , wherein the expanding mandrel has an unexpanded state in which the guide member is slidable and infinitely laterally adjustable relative to the mounting bracket claim 5 , and an expanded state in which the guide member is fixed in a lateral position relative to the mounting bracket.7. The chainguide of claim 5 , further comprising:a guide sleeve slidably supported on and non-rotatably coupled with the expanding mandrel,the guide member supported by and rotatable relative to the guide sleeve.8. The chainguide of claim 7 , wherein the guide member has a rotatable state in which the guide member is rotatable relative to the guide sleeve and a non-rotatable state in which the guide member is non-rotatable relative to the guide sleeve.9. The chainguide of claim 7 , wherein the expanding mandrel and the guide sleeve have an elliptical coupling.10. The chainguide of claim 7 , wherein the expanding mandrel and the guide sleeve have a splined coupling.11. The chainguide of claim 1 , wherein the mounting bracket is to mount the ...

DEVICE FOR ACTUATING A FRONT DERAILLEUR OF A BICYCLE

A device for actuating a bicycle front derailleur and displacing a transmission chain between toothed wheels of different diameters. An indexer associated with the derailleur comprises a first stop position and a second stop position. The first stop corresponds to engagement of the transmission chain on a first toothed wheel and the second stop position corresponds to engagement of the transmission chain on a different toothed wheel. A control lever operatively active on the indexer switches between the stop positions with a single actuation of the control lever. 1. A device for actuating a front derailleur of a bicycle to displace a transmission chain between a first toothed wheel and a second toothed wheel of a smaller diameter , comprising:an indexer operatively associated with a front derailleur and comprising a first lower stop position and a second lower stop position at which a transmission chain is engaged on the second toothed wheel, wherein the second lower stop position is configured to center the front derailleur on the second toothed wheel;{'b': '4', 'said indexer comprising a first upper stop position (P) corresponding to an engagement of the transmission chain on a first toothed wheel;'}{'b': 1', '2', '4', '4', '2, 'at least one control lever operatively active on said indexer to switch said indexer between the first lower stop position (P), the second lower stop position (P) and the first upper stop position (P), wherein with a single actuation of the control lever switches said indexer from the first upper stop position (P) to the second lower stop position (P).'}23213. The actuation device according to claim 1 , wherein said indexer comprises a third lower stop position (P) at which the transmission chain is engaged on the second toothed wheel and said second lower stop position (P) is arranged between the first lower stop position (P) and the third lower stop position (P).3552452. The actuation device according to claim 1 , wherein said indexer ...

FRONT DERAILLEUR DEVICE FOR A BICYCLE CHAIN SHIFT

A front derailleur device for a bicycle chain shift includes a frame fixing part for attachment to a bicycle frame, a hinge arrangement which is pivotable relative to the frame fixing part, and a chain cage which is pivotable relative to the frame fixing part via the pivotable hinge arrangement for guiding and pivoting of the bicycle chain. The hinge arrangement includes at least two hinged struts which can be mounted rotatably relative to the frame fixing part and relative to the chain cage about pivot axes. The pivot axes run substantially parallel to each other and, in a mounted state of the derailleur device on a bicycle, may be oriented substantially vertically. 1. A front derailleur device for a bicycle chain shift , comprising:a frame fixing part configured to be attachable to a bicycle frame;a hinge arrangement pivotable relative to the frame fixing part; anda chain cage pivotable relative to the frame fixing part via the pivotable hinge arrangement for guiding and pivoting of the bicycle chain,wherein the hinge arrangement comprises at least two hinged struts which can be mounted rotatably relative to the frame fixing part and relative to the chain cage about bearing pins and pivot axes assigned to the bearing pins,wherein the pivot axes run substantially parallel to each other and, in a mounted state of the derailleur device on a bicycle, are oriented substantially vertically or are tilted by a maximum of 30 degrees to a vertical axis, wherein the derailleur device can be actuated via a control cable,wherein the control cable can be guided relative to the bicycle frame via a cable guide device provided on the frame fixing part, the control cable can be fixed to the derailleur device via a cable fixing device, the cable fixing device provided on the frame fixing part, and the control cable is guided between the cable fixing device and the cable guide device via a cable deflecting device that is arranged on one of the hinged struts of the hinge arrangement ...

BICYCLE FRONT DERAILLEUR

A front derailleur is provided with a base member, a linkage assembly, a chain guide, an input link, a connecting link and an outer casing receiving part. The linkage assembly includes a first link coupled to the base member at a first pivot axis, a second link coupled to the base member at a second pivot axis, and an extension link coupled to the first link and the base member. The chain guide is coupled to the first and second links. The input link, is supported relative to the base member about a third pivot axis, and connects to an operation cable. The connecting link is connected to the input link about a fourth pivot axis and to the extension link about a fifth pivot axis. The outer casing receiving part is disposed on the base member and receives an outer casing through which the operation cable passes. 1. A bicycle front derailleur comprising:a base member configured to be mounted to a bicycle frame;a linkage assembly including a first link pivotally coupled to the base member at a first pivot axis, an extension link operatively coupled to the first link and pivotally coupled to the base member, and a second link pivotally coupled to the base member at a second pivot axis;a chain guide pivotally coupled to the first and second links to move between a retracted position and an extended position;an input link pivotally supported relative to the base member about a third pivot axis, the input link being configured to be connected to an operation cable to move the input link in response to operation of the operation cable;a connecting link pivotally connected to the input link about a fourth pivot axis and pivotally connected to the extension link about a fifth pivot axis such that the linkage assembly moves in response to movement of the input link; andan outer casing receiving part configured to receive an outer casing through which the operation cable passes, the outer casing receiving part being disposed on the base member.2. The bicycle front derailleur ...

FRONT DERAILLEUR

A front derailleur basically includes a fixed member, a movable member, a driven link and a first link. The fixing member is configured to be fixed to a bicycle frame. The movable member is movably supported with respect to the fixed member. The driven link is operatively coupled to the movable member. The first link movably connects the movable member to the fixed member, and is adjustably coupled to the driven link in a fixed position by a fixing structure to establish a fixed rest position of the movable member with respect to the fixed member. 1. A front derailleur comprising:a fixed member configured to be fixed to a bicycle frame;a movable member movably supported with respect to the fixed member;a driven link operatively coupled to the movable member; anda first link movably connecting the movable member to the fixed member and adjustably coupled to the driven link in a fixed position by a fixing structure to establish a fixed rest position of the movable member with respect to the fixed member.2. The front derailleur according to claim 1 , whereinthe first link and the driven link are pivotally mounted on the fixed member about a single pivot axis.3. The front derailleur according to claim 2 , whereinthe fixing structure abuts opposite circumferentially facing sides of the driven link with respect to the pivot axis to establish the fixed rest position of the movable member.4. The front derailleur according to claim 1 , whereinthe fixing structure includes a first bolt screwed into one of the first link and the driven link and abutting the other of the first link and the driven link, and a second bolt mounted on the one of the first link and the driven link and threaded into a. movable abutment member that moves axially along a threaded shaft of the second bolt and that abuts the other of the first link and the driven link as the second bolt is turned about its screwing axis.5. The front derailleur according to claim 4 , whereinthe other of the first link and ...

BICYCLE DERAILLEUR

A bicycle derailleur includes abuse member, a movable member and a linkage assembly. The base member is mounted to a bicycle frame. The movable member moves between a retracted position and an extended position at which the movable member is farther from the base member than the retracted position. The linkage assembly operatively couples the base member and the movable member. The linkage assembly includes a first link, a second link, an extension link and a sliding link. The first and second links are pivotally coupled between the base member and the movable member. The extension link extends from one of the first and second links toward the other of the first and second links. The sliding link includes a sliding portion slidably coupled to the extension link to slide along the extension link and a pivoting portion pivotally coupled to the other of the first and second links. 1. A bicycle derailleur comprising:a base member configured to be mounted to a bicycle frame;a movable member configured to be movable with respect to the base member between a retracted position and an extended position at which the movable member is farther from the base member than the retracted position; and a first link pivotally coupled to the movable member about a first pivot axis,', 'a second link pivotally coupled to the movable member about a second pivot axis spaced apart from the first pivot axis,', 'an extension link extending from one of the first and second links toward the other of the first and second links, and', 'a sliding link including a sliding portion slidably coupled to the extension link to slide along the extension link and a pivoting portion pivotally coupled to the other of the first and second links., 'a linkage assembly operatively coupled between the base member and the movable member, the linkage assembly comprising2. The bicycle derailleur according to claim 1 , whereinthe sliding link is configured to slide along the extension link toward one of the first ...

FRONT DERAILLEUR

A front derailleur unit basically includes a fixed member and a movable member. The fixed member is configured to be releasably attached to a plurality of different type mounting units. The different type mounting units is detachably attached to a bicycle frame. The movable member is movably supported to the fixed member to move with respect to the fixed member. 1. A front derailleur unit comprising:a fixed member configured to be releasably attached to a plurality of different type mounting units, the different type mounting units being detachably attached to a bicycle frame; anda movable member movably supported to the fixed member to move with respect to the fixed member.2. The front derailleur unit according to claim 1 , whereinthe fixed member includes an attachment portion that is non-fixedly attached to the different type mounting units so that prevent relative movement between the fixed member and the different type mounting units.3. The front derailleur unit according to claim 2 , whereinthe attachment portion includes one of a track and a slider that slidably engages the other of the track and the slider, which is formed on the different type mounting units.4. The front derailleur unit according to claim 3 , whereinthe one of the track and the slider is arranged to provide relative movement between the fixed member and the different type mounting units toward at least one of a first direction and a second direction, which is opposite to the first direction, andthe one of the track and the slider is further arranged to prevent relative movement between the fixed member and the different type mounting units toward third and fourth directions that are perpendicular to the first and second directions while the other of the track and the slider of one of the different type mounting units is engaged with the one of the track and the slider of the attachment portion.5. The front derailleur unit according to claim 4 , whereinthe one of the track and the slider is ...

FRONT DERAILLEUR

A front derailleur basically includes a fixed member, a main body, a movable member and a support member. The fixing member is configured to be fixed to a bicycle frame. The main body is attached to the fixing member. The movable member is movably supported to the main body with respect to the fixing member. The support member is movably attached to one of the fixing member and the main body. The support member including an operated portion selectively operated by an operating element and positioned between the fixing member and the main body. 1. A front derailleur comprising:a fixing member configured to be fixed to a bicycle frame;a main body attached to the fixing member;a movable member movably supported to the main body with respect to the fixing member; anda support member movably attached to one of the fixing member and the main body, the support member including an operated portion selectively operated by an operating element and positioned between the fixing member and the main body.2. The front derailleur according to claim 1 , whereinthe fixing member has an attachment portion, and the main body is adjustably attached to the attachment portion.3. The front derailleur according to claim 2 , whereinthe attachment portion includes a curved surface that contacts a curved surface of the main body to define an adjustment axis about which the main body moves relative to the fixing member upon adjustment of the support member.4. The front derailleur according to claim 3 , whereinthe support member is movably attached to the main body and defines a displacement axis that is perpendicularly arranged relative to the adjustment axis to adjust an angular position of the main body about the adjustment axis.5. The front derailleur according to claim 1 , whereinthe support member is movably attached to the main body,the operated portion of the support member is selectively operated by a tool and faces the fixing member, andthe fixing member has a tool access opening for ...

FRONT DERAILLEUR

A front derailleur is basically provided with a base member, a chain guide, a link mechanism and a cable guiding structure. The base member is fixedly coupled to a bicycle. The chain guide is configured to guide a chain. The link mechanism movably couples the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable. The link mechanism includes a cable attachment portion that is configured to be attached to the operation cable. The cable guiding structure guides the operation cable from the cable attachment portion. The cable guiding structure is disposed on at least one of the base member and the link mechanism. The cable guiding structure has a cable exit that is arranged such that the operation cable exits forwardly from the cable guiding structure towards the front of the bicycle. 1. A front derailleur attachable to a bicycle having a crank axis and a rear wheel axis which is parallel to the crank axis , the front derailleur comprising:a base member configured to be fixedly coupled to the bicycle;a chain guide configured to guide a chain;a link mechanism movably coupling the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable, the link mechanism including a cable attachment portion that is configured to be attached to the operation cable; anda cable guiding structure configured to guide the operation cable from the cable attachment portion, the cable guiding structure being disposed on at least one of the base member and the link mechanism, the cable guiding structure having a cable exit that is arranged such that the operation cable exits forwardly from the cable guiding structure within a sector having an angle of 150 degrees around the crank axis from an upper radius lying in a first plane that is perpendicular to a second plane containing the crank axis and the rear wheel axis.2. The front derailleur ...

BICYCLE DERAILLEUR AND METHOD

A front derailleur for use on devices such as bicycles is movable about a yaw axis while it moves laterally. The front derailleur may include a linkage in between a mount and a cage, with the linkage pivoting about two non-parallel axes. The front derailleur may include a linkage in between the mount and the cage that has links of different effective lengths. The front derailleur may include a single link and a cam. 1. A front derailleur for a bicycle having a frame member and a chain engaging one of a plurality of chainwheels , the frame member having a longitudinal axis , the front derailleur comprising:a mount configured to be fixed to the frame member;a movable element separate from the mount and interiorly receiving a portion of the chain, the movable element contacting an exterior side of the chain to laterally displace the chain between the plurality of chainwheels; anda linkage connecting the movable element to the mount and configured to move the movable element laterally with respect to the frame member and rotatably about a yaw axis substantially parallel to the longitudinal axis.2. The front derailleur according to claim 1 , wherein the movable element includes a cage having two side plates fixed relative to each other claim 1 , the two side plates spaced apart from each other and interiorly receiving the portion of the chain therebetween claim 1 , the side plates contacting the exterior side of the chain to laterally displace the chain between the plurality of chainwheels.3. The front derailleur according to claim 2 , wherein the mount has a first cam surface and the movable element has a second cam surface that contacts and displaces along the first cam surface.4. The front derailleur according to claim 2 , wherein the linkage includes:a first link member connecting the cage to the mount and configured to move the cage laterally with respect to the frame member and rotatably about the yaw axis, the first link member being pivotally connected to the ...

DEVICE FOR STOPPING THE LATERAL DISPLACEMENT OF A BICYCLE CHAIN

The present invention relates to a device for stopping lateral displacement of a bicycle chain. The device comprises a mounting element configured to be mounted on a bicycle frame. The mounting element comprises a first portion configured to be coupled, at a first coupling axis, with a front derailleur of a bicycle, and a second portion configured to be coupled, at a second coupling axis distinct from said first coupling axis, with a stop element that stops the lateral displacement of said chain. 1. Device for stopping the lateral displacement of a bicycle chain , the device comprising:a mounting element configured to be mounted on a bicycle frame, said mounting element comprising:a first portion configured to be coupled, at a first coupling axis, with a front derailleur of a bicycle, anda second portion configured to be coupled, at a second coupling axis distinct from said first coupling axis, with a stop element provided for stopping the lateral displacement of said chain.2. Device according to claim 1 , wherein said second coupling axis is parallel to said first coupling axis.3. Device according to claim 1 , wherein said second portion is arranged at a lower position with respect to said first portion when said mounting element is mounted on said bicycle frame.4. Device according to claim 1 , wherein said mounting element comprises claim 1 , coaxially to said first coupling axis claim 1 , a hole claim 1 , preferably a through hole claim 1 , configured to receive a first screw provided for fixing said front derailleur to said mounting element.5. Device according to claim 1 , comprising claim 1 , at said second coupling axis claim 1 , a second screw provided for fixing said stop element to said mounting element claim 1 , said second screw preferably being fixedly associated claim 1 , more preferably co-moulded claim 1 , with said mounting element.6. Device according to claim 5 , wherein said stop element comprises a through opening for the passage of said second ...

Bicycle Derailleur

A bicycle front derailleur includes a base member to be mounted to a bicycle frame, a chain guide, a first link pivotally connected to the chain guide about a first pivot axis, and a second link pivotally connected to the chain guide about a second pivot axis. The chain guide includes a link-connecting structure pivotally connected to the first link. The link-connecting structure includes a first link-connecting portion and a second link-connecting portion. The first link includes a first chain guide-connecting portion and a second chain guide-connecting portion. At least one of the first link-connecting portion and the second link-connecting portion is located between the first chain guide-connecting portion and the second chain guide-connecting portion. 1. A bicycle front derailleur comprising:a base member configured to be mounted to a bicycle frame,a chain guide;a first link pivotally connected to the chain guide about a first pivot axis; anda second link pivotally connected to the chain guide about a second pivot axis, whereinthe chain guide includes a link-connecting structure pivotally connected to the first link,the link-connecting structure includes a first link-connecting portion and a second link-connecting portion,the first link includes a chain guide-connecting structure pivotally connected to the link-connecting structure of the chain guide,the chain guide-connecting structure includes a first chain guide-connecting portion and a second chain guide-connecting portion, andat least one of the first link-connecting portion and the second link-connecting portion is located between the first chain guide-connecting portion and the second chain guide-connecting portion.2. The bicycle front derailleur according to claim 1 , wherein the first link includes a cable-actuation portion to transmit a pulling force of a bicycle-control cable to the first link.3. The bicycle front derailleur according to claim 2 , wherein the first chain guide-connecting portion is ...

DEVICE FOR A BICYCLE PROVIDED WITH CHAIN WHEELS AND SPROCKETS

A device () for a bicycle provided with chain wheels () and sprockets (), a chain stretched between the chain wheels () and sprockets (), and a rear derailleur (DR), the device () including a housing () containing: chain wheel () shifting elements () that include direct control of a fork () and form a front derailleur (DA); elements () for shifting the sprockets () via the rear derailleur (DR); and elements () for controlling the chain wheel () shifting elements () and the sprocket () shifting elements (). 114161220. Single device for shifting gears on a bicycle equipped with chain wheels () and sprockets () , a chain () stretched between these chain wheels and sprockets as well as a rear derailleur DR , said single device for shifting gears comprising a single case () incorporating:{'b': 26', '42', '28, 'means () for changing wheel chains with direct control of a fork (), forming front derailleur DA, means () for changing sprockets via the rear derailleur DR, and'}{'b': 30', '26', '28, 'means () for control of said means () for changing chain wheels and of said means () for changing sprockets.'}232303232132244. Single device for shifting gears on a bicycle according to claim 1 , characterized in that it comprises means () for operating the control means () claim 1 , these operating means () comprising two operated cables (- claim 1 , -) claim 1 , and a capstan () intended to receive the two cables with inverted windings.33246485052544856. Single device for shifting gears on a bicycle according to claim 2 , wherein these operating means () comprise an indexer () consisting of a disk () with notches () made on the periphery claim 2 , a pawl () of the type mounted to slide in a recessed housing () in a radial direction relative to said disk () claim 2 , subject to the force of a return spring ().45254485058. Single device for shifting gears on a bicycle according to claim 3 , wherein the pawl () is mounted in the housing () with an angular play making it possible for ...

BICYCLE DRIVE UNIT

A bicycle drive unit includes a motor, which outputs assist force in correspondence with human-powered drive force applied to a crankshaft, and a housing, in which the motor is arranged. The housing includes a coupler, to which a derailleur can be coupled. 1. A bicycle drive unit comprising:a motor that outputs assist force in correspondence with human-powered drive force applied to a crankshaft; anda housing on which a coupler is arranged, wherein a derailleur can be coupled to the coupler.2. The bicycle drive unit according to claim 1 , wherein the coupler is formed separately from the housing.3. The bicycle drive unit according to claim 1 , wherein the coupler is coupled to the housing in a removable manner.4. The bicycle drive unit according to claim 1 , wherein the coupler is coupled to the housing by a fastening member.5. The bicycle drive unit according to claim 1 , wherein the coupler includes a first adjustment section configured to adjust a position of the coupler relative to the housing.6. The bicycle drive unit according to claim 5 , wherein the first adjustment section allows for adjustment of the position of the coupler in at least a direction in which the crankshaft extends.7. The bicycle drive unit according to claim 1 , wherein the first adjustment section includes an elongated hole or a plurality of holes.8. The bicycle drive unit according to claim 1 , wherein the coupler is formed integrally with at least a portion of the housing.9. The bicycle drive unit according to claim 1 , wherein the coupler includes a coupling mechanism to which the derailleur is coupled in a removable manner.10. The bicycle drive unit according to claim 9 , wherein the coupling mechanism includes a second adjustment section configured to adjust a coupling position of the derailleur relative to the coupler.11. The bicycle drive unit according to claim 10 , wherein the second adjustment section allows the position of the derailleur to be adjusted in at least a direction ...

Bicycle electrical component

A bicycle electrical component is basically provided with a wireless communication unit, a movable member, an electrical actuation unit and a support structure. The wireless communication unit includes a first housing and a wireless communication member that is contained within the first housing. The electrical actuation unit includes a second housing and an electrical actuator that is contained within the second housing. The electrical actuator is configured to actuate the movable member. The second housing is different from the first housing. The support structure detachably supports the wireless communication unit to the bicycle electrical component.

MOUNTING DEVICE FOR BICYCLE FRONT DERAILLEUR

A mounting device for mounting a front derailleur to a bicycle frame. The mounting device includes a mounting portion that is adapted to be adjustably mounted such that it is positioned around an axis that is defined by a bottom bracket of the bicycle frame, and an indicator configured to indicate an orientation of the mounting portion relative to a predetermined direction. 1. A mounting device for mounting a front derailleur to a bicycle frame , the mounting device comprising:a mounting portion that is adapted to be adjustably mounted such that it is positioned around an axis that is defined by a bottom bracket of the bicycle frame, andan indicator configured to indicate an orientation of the mounting portion relative to a predetermined direction.2. The mounting device of claim 1 , wherein the predetermined direction corresponds to a chain line which is defined by a running direction of a bicycle chain.3. The mounting device of claim 1 , wherein the indicator is configured to indicate a circumferential position of the mounting portion around the axis of the bottom bracket.4. The mounting device of claim 1 , wherein the indicator comprises a directional mark which is configured to be parallel to the predetermined direction.5. The mounting device of claim 2 , wherein the chain line is defined by the running direction of the bicycle chain when the bicycle chain is engaged with a chain ring.6. The mounting device of wherein the indicator includes at least first and second indicators that are positioned such that when the mounting device is adjustably mounted around the axis of the bottom bracket the first indicator will indicate an orientation of the mounting portion relative to a first direction corresponding to a first chain line defined by a first chain ring and the second indicator will indicate an orientation of the mounting portion relative to a second direction corresponding to a second chain line defined by a second chain ring.7. The mounting device of claim 1 ...

BICYCLE GEARBOX HAVING SEGMENTED SPROCKETS

A gearbox may include a drive spindle and several interconnected gear clusters arranged in a housing. A first of the gear clusters is coaxially fastened to the spindle, and has an outboard gear and an inboard gear. The first gear cluster drives a belt or chain to operate one or more of the other gear clusters, and the inboard gear is physically divided into a plurality of segments. A shifting system for the gearbox includes an actuator configured to urge the segments of the inboard gear of the first gear cluster into and out of the plane of the belt or chain via a toggle and slider mechanism, such that a gear ratio of the gearbox is changeable without displacing the belt or chain out of the plane. 1. A vehicle drivetrain comprising:a rotatable gear coupled to a continuous chain or belt defining a plane, the gear divided into a plurality of pivotable segments, such that an outer edge of each of the pivotable segments is transitionable into and out of the plane;a plurality of segment actuators, each of the segment actuators rotatable with and coupled to a respective one of the pivotable segments; (a) a first position, in which a first ramped face of the toggle is disposed in a path of the segment actuator of each segment when the segment is out of the plane of the chain or belt, such that rotating the segment actuator into the first ramped face urges the segment into the plane, and', '(b) a second position, in which a second ramped face of the toggle is disposed in the path of the segment actuator when the segment is in the plane of the chain or belt, such that rotating the segment actuator into the second ramped face urges the segment out of the plane., 'a linear actuator coupled to a toggle, wherein the linear actuator is configured to transition the toggle between2. The drivetrain of claim 1 , wherein the linear actuator does not rotate with respect to the rotatable gear.3. The drivetrain of claim 1 , each of the segment actuators comprising a slider coupled to the ...

Bicycle derailleur

A bicycle derailleur comprises a base member, a chain guide, a first link, and a wire guide. The base member is configured to be coupled to a bicycle frame. The chain guide is configured to guide a bicycle chain. The first link is configured to couple the chain guide to the base member so that the chain guide is movable relative to the base member between a retracted position and an extended position. The wire guide includes only one wire guiding portion configured to guide an inner wire of a control cable which is in at least one of a top pull arrangement and a bottom pull arrangement. The wire guide is a separate member from the first link and configured to be attached to the first link.

MOTOR DRIVEN DERAILLEUR FOR A BICYCLE GEARSHIFT

A motor actuated derailleur for a bicycle gearshift that has a support body adapted for mounting on a bicycle frame. A chain guide moves a bicycle chain between different engaged positions on respective gear wheels. A pair of connecting rods connects said chain guide to said support body with a first connecting rod of said pair of connecting rods being rotatable about a first rotation axis (X) at a first end thereof. A motor housed in said support body has an output shaft able to rotate about a second rotation axis. A transmission between said motor and said first connecting rod is housed in an inner chamber of said support body that comprises at least one adjustable end stop element that prevents the rotation of the output shaft beyond a predetermined rotation angle, in at least one of the two directions of rotation of the output shaft. 1. Motor actuated derailleur for a bicycle gearshift , comprising:a support body adapted for mounting on a bicycle frame,a chain guide suitable for moving a bicycle chain between different engaged positions on respective gear wheels,a pair of connecting rods that connect said chain guide to said support body, a first connecting rod of said pair of connecting rods being rotatable about a first rotation axis (X) at a first end thereof,a gear motor unit housed in said support body and provided with an output shaft able to rotate about a second rotation axis (Y),a motion transmission between said gear motor unit and said first connecting rod, housed in an inner chamber of said support body, andwherein said inner chamber comprises at least one adjustable end stop element that prevents the rotation of the output shaft beyond a predetermined rotation angle, in at least one of the two directions of rotation of the output shaft.2. Derailleur according to claim 1 , wherein said motion transmission comprises a first toothed sector formed on said first connecting rod at said first end claim 1 , and a second toothed sector formed on said output ...

POWER UNIT AND STRADDLE-TYPE VEHICLE

A power unit includes: a rotation plate that is fixed to an end of a shift drum , includes a plurality of recessed portions , and rotates together with the shift drum ; a shift lever that engages with the rotation plate ; a shift shaft fixed to the shift lever ; a support shaft disposed substantially in parallel with the shift drum ; a stopper lever rotatably supported by the support shaft ; and a stopper roller that is provided in the stopper lever and engages with the recessed portion of the rotation plate . When viewed in an axial direction of the shift shaft , the stopper lever is disposed to intersect a first line segment A that connects a center C of the shift shaft and a center C of the rotation plate to each other. 1. A power unit , comprising:a main shaft having a plurality of first gears including a first movable gear that is movable around an axis of the main shaft;a drive shaft having a plurality of second gears including a second movable gear that is movable around an axis of the drive shaft, the second gears being configured to intermesh with the first gears;a shift fork configured to engage with the first movable gear and the second movable gear;a shift drum having a groove with which the shift fork engages;a crankcase housing the main shaft, the drive shaft, the shift fork and the shift drum;a rotation plate fixed to an end of the shift drum, to thereby rotate with the shift drum, the rotation plate including an outer peripheral surface having a plurality of recessed portions;a shift lever configured to engage with the rotation plate;a shift shaft fixed to the shift lever;a support shaft disposed substantially in parallel with the shift drum;a stopper lever, including a first end portion and a second end portion that is rotatably supported by the support shaft;a stopper roller disposed between the first end portion and the second end portion of the stopper lever, and being configured to engage with one of the recessed portions of the rotation plate; ...

BICYCLE FRONT DERAILLEUR

The disclosure provides a bicycle front derailleur configured to be mounted on a bicycle frame. The bicycle front derailleur includes a fixed component, a chain guide, a linkage assembly, and an adjustment component. The fixed component is configured to be mounted on the bicycle frame. Two opposite ends of the linkage assembly are respectively and pivotably disposed on the fixed component and the chain guide. The adjustment component is pivotably disposed on the fixed component. The adjustment component is configured to press against the bicycle frame so as to adjust a position of the bicycle front derailleur with respect to the bicycle frame. 1. A bicycle front derailleur , configured to be mounted on a bicycle frame , comprising:a fixed component, configured to be mounted on the bicycle frame;a chain guide;a linkage assembly, wherein two opposite ends of the linkage assembly are respectively and pivotably disposed on the fixed component and the chain guide; andan adjustment component, pivotably disposed on the fixed component, wherein the adjustment component is configured to press against the bicycle frame so as to adjust a position of the bicycle front derailleur with respect to the bicycle frame.2. The bicycle front derailleur according to claim 1 , further comprising an activating component claim 1 , wherein the activating component is in contact with the adjustment component claim 1 , the activating component is movable with respect to the fixed component so as to force the adjustment component to press against the bicycle frame to adjust the position of the bicycle front derailleur with respect to the bicycle frame.3. The bicycle front derailleur according to claim 2 , wherein the activating component and the adjustment component are two independent objects.4. The bicycle front derailleur according to claim 2 , wherein the activating component is movable in a direction perpendicular to a pivot axis of the adjustment component.5. The bicycle front derailleur ...

LINEAR DERAILLEUR MECHANISM

A derailleur system is provided that moves the derailleur cage in a substantially rectilinear path. The derailleur is mounted to a frame having a gear cassette mounted thereon. The gear cassette includes an axis of rotation. The derailleur includes a drive member engaging the gear cassette. The derailleur is positioned on the frame adjacent the gear cassette, and including a spatial linkage having a stationary link, a floating link, and a cage assembly having two pulleys each defining an axis of rotation. The drive member engages each of the pulleys. The path of the floating link is substantially linear through substantially its entire range of motion and variously aligns at least one of the pulleys with the gear cassette. 1. A bicycle comprising:a frame having a gear cassette mounted thereon, the gear cassette having an axis of rotation;a drive member engaging the gear cassette; 'a stationary link and a floating link wherein the path of the floating link is substantially linear through substantially its entire range of motion.', 'a derailleur positioned on the frame adjacent the gear cassette, with the derailleur having a cage assembly with two pulleys each defining an axis of rotation and the drive member engaging each of the pulleys, wherein the derailleur also includes a spatial linkage having2. The bicycle of claim 1 , wherein the gear cassette is a rear gear cassette operably associated with a rear wheel.3. The bicycle of claim 1 , wherein the gear cassette is a front chain ring set operably associated with a crank.4. The bicycle of claim 1 , wherein the pulley axes of the cage assembly is parallel to the axis of rotation of the gear cassette and remains parallel to the axis of rotation of the gear cassette throughout its entire range of motion.5. The bicycle of claim 1 , wherein the pulley axes of the cage assembly is not parallel to the axis of rotation of the gear cassette and remains not parallel to the axis of rotation of the gear cassette throughout its ...

BICYCLE GEAR SHIFTING SYSTEM

A bicycle front shifting system includes operable to transmit a wireless signal, a crank assembly with two crank arms and a pedal on each of the two crank arms. The crank assembly is rotatable about a rotation axis. A front shift unit is coupled to the crank assembly and is rotatable about the rotation axis. The front shift unit includes a chain ring component with a big chain ring and a small chain ring. The small chain ring has a small diameter and the big chain ring has a big diameter that is larger than the small diameter. A shift mechanism is coupled to and rotatable with the chain ring component about the rotation axis. The shift mechanism is configured to receive the wireless signal from the shifter and to shift a chain between the big chain ring and the small chain ring according to the wireless signal. 1. A bicycle front shifting assembly , comprising:a front shift unit configured to be coupled to a crank assembly for rotation therewith about a rotation axis, the front shift unit having a chain ring component and a shift mechanism coupled to the chain ring component,wherein the chain ring component has a big chain ring having a plurality of teeth defining a big chainring plane and a small chain ring having a plurality of teeth defining a small chainring plane, the small chain ring having a small diameter and the big chain ring having a big diameter that is larger than the small diameter, andwherein the shift mechanism includes at least one protruding shift element disposed in a transition zone between the big chain ring and the small chain ring, the shift mechanism configured to move the at least one protruding shift element axially between the big chainring plane and the small chainring plane.2. The front shifting assembly of claim 1 , wherein the shift mechanism includes a plurality of protruding shift elements disposed in the transition zone.3. The front shifting assembly of claim 2 , wherein the plurality of protruding shift elements are upshift ...

BICYCLE DERAILLEUR GEAR, PARTICULARLY A FRONT DERAILLEUR GEAR, WITH IMPROVED RELIABILITY

The present invention relates to a bicycle derailleur gear, particularly a front derailleur gear, with improved reliability that comprises a kinematic mechanism in the form of a four-bar linkage with a base body and a mobile body connected together through a pair of connecting rods hinged to the base body and to the mobile body at four pin elements, the mobile body carrying a chain guide, the four-bar linkage-kinematic mechanism being associated with derailleur gear actuation means suitable for deforming the four-bar linkage-kinematic mechanism so as to determine a displacement of the mobile body with respect to the base body and consequently a displacement of the chain guide, the derailleur gear actuation means being of the motorized type and comprising a motor casing and an outlet shaft that projects directly from said motor casing and characterised in that the actuation means command a translation in the axial direction of the outlet shaft with respect to the motor casing and are mounted between distinct components of the four-bar linkage-kinematic mechanism through interposition of at least one tilting interface about a fifth pin element substantially parallel to the pin elements. 1. Bicycle derailleur gear comprising a kinematic mechanism in the form of a four-bar linkage with a base body and a mobile body connected together through a pair of connecting rods hinged to said base body and to said mobile body at four pin elements , said mobile body carrying a chain guide , said four-bar linkage-kinematic mechanism being associated with derailleur gear actuation means suitable for deforming said four-bar linkage-kinematic mechanism so as to determine a displacement of said mobile body with respect to said base body and consequently a displacement of said chain guide , said derailleur gear actuation means being of the motorised type and comprising a motor casing and an outlet shaft that projects directly from said motor casing , wherein said actuation means command ...

ADJUSTABLE SPEED EFFORT-SAVING BICYCLE

Adjustable speed effort-saving bicycle, comprising a front wheel assembly, a rear wheel assembly, and a frame, the front wheel assembly and the rear wheel assembly mounted on either front or rear end of the frame, also comprising quad-connecting rod mechanism, a chain wheel, chain A, and a transmission mechanism converting rider weight into a rocking force. The quad-connecting rod mechanism is mounted on the frame. The chain wheel is on the frame and meshes with middle part of chain A. The chain wheel is connected to the rear wheel assembly via transmission apparatus. One end of chain A is connected to an output frame-connecting rod of the quad-connecting rod mechanism. A bent part extends from where the output frame-connecting rod joins the frame. Another end of chain A is connected to the bent part. A tensioner for tensioning chain A is between the bent part and the output frame-connecting rod. 11231234534354256763578576. An adjustable speed effort-saving bicycle comprises a front wheel assembly () , a rear wheel assembly () , and a bicycle frame (); the front wheel assembly () and the rear wheel assembly () being mounted respectively on a front or rear end of the bicycle frame (); and the bicycle further comprises a quad-connecting rod mechanism , a chain sprocket () , chain A () , and a transmission mechanism for converting weight of a rider into a rocking force , in which the quad-connecting rod mechanism is mounted on the bicycle frame () , the chain sprocket () is rotatably mounted on the bicycle frame () and meshes with a middle part of chain A () , the chain sprocket () is transmissively connected to the rear wheel assembly () via the transmission mechanism , one end of chain A () is slidably connected to an output frame-connecting rod () of the quad-connecting rod mechanism , a bent part () extends from a connecting end of the output frame-connecting rod () to the bicycle frame () , the other end of chain A () is connected to the bent part () , and a ...

LINEAR DERAILLEUR MECHANISM

A derailleur system is provided that moves the derailleur cage in a substantially rectilinear path. The derailleur is mounted to a frame having a gear cassette mounted thereon. The gear cassette includes an axis of rotation. The derailleur includes a drive member engaging the gear cassette. The derailleur is positioned on the frame adjacent the gear cassette, and including a spatial linkage having a stationary link, a floating link, and a cage assembly having two pulleys each defining an axis of rotation. The drive member engages each of the pulleys. The path of the floating link is substantially linear through substantially its entire range of motion and variously aligns at least one of the pulleys with the gear cassette. 1. A bicycle comprising:a frame having a gear cassette mounted thereon, the gear cassette having an axis of rotation;a drive member engaging the gear cassette; 'a stationary link and a floating link wherein the path of the floating link is substantially linear through substantially its entire range of motion.', 'a derailleur positioned on the frame adjacent the gear cassette, with the derailleur having a cage assembly with two pulleys each defining an axis of rotation and the drive member engaging each of the pulleys, wherein the derailleur also includes a spatial linkage having2. The bicycle of claim 1 , wherein the gear cassette is a rear gear cassette operably associated with a rear wheel.3. The bicycle of claim 1 , wherein the gear cassette is a front chain ring set operably associated with a crank.4. The bicycle of claim 1 , wherein the pulley axes of the cage assembly is parallel to the axis of rotation of the gear cassette and remains parallel to the axis of rotation of the gear cassette throughout its entire range of motion.5. The bicycle of claim 1 , wherein the pulley axes of the cage assembly is not parallel to the axis of rotation of the gear cassette and remains not parallel to the axis of rotation of the gear cassette throughout its ...

Bicycle Front Derailleur with Mounting Structure and Bicycle Frame with Front Derailleur Mounting Structure

A bicycle front derailleur includes a mounting member, a chain guide, and a linkage assembly that pivotally couples the mounting member to the chain guide. The mounting member is configured to be mounted to a first frame member of a bicycle frame. The first frame member is pivotally connected to a second frame member of the bicycle frame about a pivot axis. The mounting member includes an attachment portion through which a fixing bolt for fixing the mounting member to the first frame member passes and includes an abutment configured to restrict rotation of the mounting member around the fixing bolt. The attachment portion is located on a front side of the pivot axis when the mounting member is mounted to the first frame member. The bicycle frame includes a structure for engaging and supporting the mounting member. 1. A bicycle front derailleur comprising:a mounting member configured to be mounted to a first frame member of a bicycle frame, the first frame member being pivotally connected to a second frame member of the bicycle frame about a pivot axis;a chain guide; anda linkage assembly that pivotally couples the mounting member to the chain guide, whereinthe mounting member includes an attachment portion through which a fixing bolt for fixing the mounting member to the first frame member passes and includes an abutment configured to restrict rotation of the mounting member around the fixing bolt by abutting the first frame member,the attachment portion is configured to be located on a front side of the pivot axis when the mounting member is mounted to the first frame member.2. The bicycle front derailleur according to claim 1 , wherein the abutment is integrally formed with the mounting member.3. The bicycle front derailleur according to claim 1 , wherein the first frame member is a chain stay of the bicycle frame claim 1 , and the second frame member is a seat tube of the bicycle frame.4. The bicycle front derailleur according to claim 1 , wherein the attachment ...

Support Assembly for a Bicycle Front Derailleur

A support assembly for supporting a front derailleur at a bicycle frame is provided. The bicycle frame includes a longitudinal axis, a support portion arranged lengthwise about the longitudinal axis and a mounting portion projecting outwardly from the support portion. The front derailleur includes a base member attachable to the mounting portion of the bicycle frame at a derailleur mounting axis. The base includes a support mounting surface facing the bicycle frame. The support assembly includes a support member and a support member mount. The support member is displaceable relative to the base member along the support mounting surface of the base member. The support member includes a contact surface configured to contact the support portion of the bicycle frame. The support member mount is configured to attach the support member to the support mounting surface of the base member. 1. A support assembly for supporting a front derailleur at a bicycle frame , the bicycle frame including a longitudinal axis , a support portion arranged lengthwise about the longitudinal axis and a mounting portion projecting outwardly from the support portion , the front derailleur including a base member attachable to the mounting portion of the bicycle frame at a derailleur mounting axis , the base member including a support mounting surface facing the support portion of the bicycle frame , the support assembly comprising:a support member configured to displace relative to the base member along the support mounting surface of the base member, the support member including a contact surface configured to contact the support portion of the bicycle frame; anda support member mount configured to attach the support member to the support mounting surface of the base member of the front derailleur.2. The support assembly of claim 1 , wherein the support member mount defines a support mounting axis and is configured to be attached to the base member.3. The support assembly of claim 2 , wherein ...

NARROW - WIDE TEETH CHAINRING

A sprocket for engagement with a drive chain has a plurality of teeth extending radially from a periphery of the sprocket, including a first and a second group of teeth; the teeth of the first group and the second group are alternately arranged so that each tooth of the first group is followed by a tooth of the second group, and vice versa; each tooth of the first group having a first maximum width, each tooth of the second group having a second maximum width which is larger than the first maximum width; each tooth of the second group has a protrusion on at least one lateral face of the tooth; the outer lateral face of the protrusion extends over a first portion of the lateral face of each tooth of the second group, the length being 50% of the length of the respective tooth or less. 2. The sprocket of comprising two lateral faces claim 1 , wherein each tooth of the plurality of teeth of the second group of teeth has a protrusion on each of the two lateral faces of each tooth of the plurality of teeth.3. The sprocket of claim 1 , wherein the protrusion is located adjacent to the front flank of each tooth of the plurality of teeth of the second group of teeth claim 1 , wherein a width of the respective tooth adjacent to the rear flank is equal to the width of each tooth of the first group of teeth.4. The sprocket of claim 1 , wherein:the protrusion is located adjacent to the rear flank of each tooth of the second group of teeth;the protrusion is located in the middle between the front flank and the rear flank of each tooth of the second group of teeth; orthe protrusion on the first lateral face of each tooth of the second group of teeth is located at a different location than the protrusion on the second lateral face of the respective tooth.5. The sprocket of claim 1 , wherein each tooth of the second group of teeth comprises front edges and the front edges are chamfered.6. The sprocket of claim 1 , wherein each tooth of the plurality of teeth comprises rear edges and ...

Bicycle front derailleur

The disclosure provides a bicycle front derailleur including a fixing component, a chain guiding component, a linkage assembly, a battery assembly, two terminals, a circuit board assembly and a driving module. Two opposite ends of the linkage assembly are respectively and pivotally disposed on the fixing component and the chain guiding component. The battery assembly includes a battery holder and a battery. The battery holder is disposed on the fixing component, and the battery holder has a battery slot. One terminal is disposed in the battery slot, and the battery is removably inserted into the battery slot and is electrically connected to the terminal. The circuit board assembly is disposed on the fixing component and electrically connected to the other terminal. The terminals are electrically connected to each other. The driving module is disposed on the fixing component and electrically connected to the circuit board assembly.

SINGLE PIVOT FRONT DERAILLEUR

Embodiments of a front derailleur gear shifting system including various unique chain guides attached to and operating from a single pivot point. This derailleur system provides a simple, yet, elegant and robust improvement in shifting technique over conventional, lateral motion front derailleurs. Embodiments of open and closed annulus chain guides having specially shaped lifting and pulling surfaces for acting upon a bicycle chain during shifting are also disclosed. Additionally, as an optional enhancement, a dual-sided chain catcher that prevents unintended over-shifts in either direction is disclosed. 1. A single pivot front derailleur for shifting a bicycle chain between a small chainring and a large chainring , the front derailleur , comprising:a mounting mechanism for structurally securing the front derailleur to a bicycle frame; an arm having a proximal end housing a single pivot, the arm rotating about a single pivot in a plane of rotation, the plane of rotation at an acute angle relative to any vertical plane of the bicycle frame; and', 'a chain guide connected to a distal end of the arm, the chain guide configured for lifting up or pulling down on the bicycle chain during shifting., 'a movement mechanism connected to the mounting mechanism, the movement mechanism further comprising2. The front derailleur according to claim 1 , further comprising a dual-sided chain catcher adjustably connected to the mounting mechanism with an inner guard and an outer guard cantilevered and overlapping the chainrings and the bicycle chain to prevent unintended over-shoot of the bicycle chain during shifting.3. The front derailleur according to claim 1 , wherein the chain guide comprises an annular cage completely enclosing the bicycle chain claim 1 , having a lower inner saddle-like angled lifting surface configured for lifting the bicycle chain from a low position on the small chainring to a high position on the large chainring during an up-shift.4. The front derailleur ...

GEAR SELECTOR ACTUATOR

A gear selector actuator () is provided with an electric linear drive that is accommodated in a housing () that is closed on an axial side by a cover () that has an opening () for an actuation element. The actuation element is held on the cover () and the housing () has a cap () covering an installation opening of the housing and securing the actuation element. 1. A gear selector actuator , comprising an electric linear drive that is accommodated in a housing that is closed on an axial side by a cover that has an opening for an actuation element that is held on the cover , the housing has an installation opening and a cap covers the installation opening and secures the actuation element.2. The gear selector actuator according to claim 1 , wherein the cap has claim 1 , on an inner side thereof claim 1 , a projection that is clamped in an installed state in a groove of the cover in which the actuation element is accommodated.3. The gear selector actuator according to claim 1 , wherein the actuation element is constructed as a Bowden cable having an end with a fitting.4. The gear selector actuator according to claim 1 , wherein the cap has a securing element that is accommodated in an undercut of the cover and prevents detachment of the cap from the cover.5. The gear selector actuator according to claim 4 , wherein the securing element comprises an anchor that has a connecting piece with projections extending from two sides.6. The gear selector actuator according to claim 5 , wherein the undercut has a passage opening for the connecting piece and is covered in an installed state by the housing.7. The gear selector actuator according to claim 6 , wherein the securing element extends approximately perpendicular from a longitudinal axis of the cap.8. The gear selector actuator according to claim 1 , wherein the cap comprises a flexible plastic material.9. The gear selector actuator according to claim 1 , wherein the cap has claim 1 , on an end thereof opposite the cover ...

BICYCLE GEARBOX HAVING SEGMENTED SPROCKETS

A gearbox may include a drive spindle and several interconnected gear clusters arranged in a housing. A first of the gear clusters is coaxially fastened to the spindle, and has an outboard gear and an inboard gear. The first gear cluster drives a belt or chain to operate one or more of the other gear clusters, and the inboard gear is physically divided into a plurality of segments. A shifting system for the gearbox includes an actuator configured to urge the segments of the inboard gear of the first gear cluster into and out of the plane of the belt or chain via a toggle and slider mechanism, such that a gear ratio of the gearbox is changeable without displacing the belt or chain out of the plane. 1. A method for shifting a segmented gear , the method comprising:rotating a gear cluster comprising a first gear and a coaxial second gear, wherein the gear cluster is operatively coupled to a power transfer mechanism, wherein a power transfer mechanism defines a plane and is wrapped partially around the first gear, and wherein the first gear has a plurality of gear segments independently movable into and out of the plane;rotating a plurality of radially transitionable sliders in tandem with the first gear, each of the sliders having one or more protrusions and coupled to a corresponding one of the gear segments of the first gear;pivoting a toggle into a first position such that a first ramped face of the toggle is in a path of the one or more protrusions of the sliders; andsequentially moving each segment of the first gear out of the plane of the power transfer mechanism by urging the slider radially when the one or more protrusions strike the first ramped face of the toggle, such that the power transfer mechanism wraps at least partially around the second gear.2. The method of claim 1 , wherein each of the sliders is coupled to the corresponding one of the segments by a slotted hinge.3. The method of claim 2 , wherein the slotted hinge is on an opposite side of the ...

BICYCLE DERAILLEUR

A bicycle derailleur is provided with a base member, a chain guide, a linkage assembly and a cable fixing structure. The base member is configured to be mounted to a bicycle frame. The chain guide is movable between retracted and extended positions with respect to the base member. The linkage assembly operatively couples the chain guide to the base member. The cable fixing structure is configured to fix an operation cable that moves the linkage assembly in response to an operation of the operation cable. The cable fixing structure is mounted to one of the chain guide and the linkage assembly. The cable fixing structure includes a cable attachment member to which the operation cable is fixed. The cable attachment member is movable with respect to the one of the chain guide and the linkage assembly with the operation cable being fixed to the cable attachment member. 1. A bicycle derailleur comprising:a base member configured to be mounted to a bicycle frame;a chain guide configured to be movable between a retracted position and an extended position with respect to the base member;a linkage assembly operatively coupling the chain guide to the base member; and 'a cable attachment member to which the operation cable is fixed, the cable attachment member being movable with respect to the one of the chain guide and the linkage assembly in a state where the operation cable is fixed to the cable attachment member.', 'a cable fixing structure configured to fix an operation cable that moves the linkage assembly in response to an operation of the operation cable, the cable fixing structure being mounted to one of the chain guide and the linkage assembly, and the cable fixing structure including2. The bicycle derailleur according to claim 1 , whereinthe cable fixing structure includes a cable tension adjusting structure configured to move the cable attachment member relative to the one of the chain guide and the linkage assembly.3. The bicycle derailleur according to claim 1 , ...

DEVICE FOR MOUNTING A FRONT DERAILLEUR ON A BICYCLE FRAME AND METHOD FOR MOUNTING SUCH A FRONT DERAILLEUR

The present invention relates to a device for mounting a front derailleur on a bicycle frame. The device of the invention comprises engagement means for engaging with at least one toothed crown of a crankset and with the derailleur, the engagement means being configured to obtain a desired relative position between the aforementioned at least one toothed crown and the derailleur. The present invention also relates to a method for mounting the front derailleur on the bicycle frame, such a method providing for the use of the aforementioned device. 1. Device for mounting a front derailleur on a bicycle frame , comprising engagement means for engaging with at least one toothed crown of a crankset and with said derailleur , said engagement means being configured to obtain a desired relative position between said at least one toothed crown and said derailleur.2. Device according to claim 1 , wherein said engagement means define a desired relative position between said at least one toothed crown and said derailleur along a first direction and a desired angular position between said at least one toothed crown and said derailleur.3. Device according to claim 1 , wherein said engagement means comprise first engagement means for engaging with said at least one toothed crown and second engagement means for engaging with said derailleur claim 1 , wherein said first engagement means define a desired relative position of said at least one toothed crown with respect to said device and wherein said second engagement means define a desired relative position of said derailleur with respect to said device.4. Device according to claim 1 , wherein said crankset comprises at least two toothed crowns and said at least one toothed crown is the toothed crown with the greater diameter of said at least two toothed crowns.5. Device according to claim 1 , wherein said engagement means comprise a groove configured to house an annular portion of said at least one toothed crown.6. Device according ...

BICYCLE FRONT DERAILLEUR

A bicycle front derailleur is basically provided with a base member, a chain guide, a link mechanism, and a biasing member. The base member is configured to be fixedly coupled to the bicycle. The chain guide is configured to guide a chain. The link mechanism couples the chain guide to the base member between retracted and extended positions in response to movement of an operation cable. The link mechanism includes a first link pivotally connected to the chain guide about a first pivot axis. The first link is configured such that the first pivot axis moves in a forward-rearward direction, while the chain guide moves between the retracted position and the extended position in a mounted state where the base member is mounted to a bicycle frame. The biasing member is operatively disposed between the base member and the chain guide to bias the chain guide towards the extended position. 1. A bicycle front derailleur comprising:a base member configured to be fixedly coupled to the cycle;a chain guide configured to guide a chain;a link mechanism coupling the chain guide to the base member between a retracted position and an extended position in response to a movement of an operation cable, the link mechanism including a first link pivotally connected to the chain guide about a first pivot axil the first link being configured such that the first pivot axis moves in a forward-rearward direction, while the chain guide moves between the retracted position and the extended position in a mounted state where the base member is mounted to the bicycle frame; anda biasing member operatively disposed between the base member and the chain guide to bias the chain guide towards the extended position.2. The bicycle front derailleur according to claim 1 , further comprisinga cable guiding structure configured to guide the operation cable such that the operation cable pulls the link mechanism in a first direction with respect to the base member as the operation cable is pulled in a second ...

BICYCLE FRONT DERAILLEUR

A bicycle front derailleur basically includes a base member, a chain guide, a linkage assembly and a support structure. The base member is configured to be mounted to a bicycle frame. The linkage assembly movably couples the chain guide to the base member to move relative to the base member between a retracted position and an extended position. The support structure includes a support member and a contact member. The support member is configured to be mounted to the base member and to advance toward the bicycle frame in a first direction. The contact member includes a contact part and a coupling part extending from the contact part. The contact part is configured to contact the support member and the bicycle frame. The coupling part is configured to be movably coupled to the base member. 1. A bicycle front derailleur comprising:a base member configured to be mounted to a bicycle frame;a chain guide;a linkage assembly configured to movably couple the chain guide to the base member so that the chain guide is movable relative to the base member between a retracted position and an extended position; and a support member configured to be mounted to the base member and to be advanced toward the bicycle frame in a first direction; and', 'a contact member including a contact part and a coupling part extending from the contact part, the contact part being configured to contact the support member and the bicycle frame, and the coupling part being configured to be movably coupled to the base member., 'a support structure including2. The bicycle front derailleur according to claim 1 , whereinthe base member includes a first receiving part, andthe coupling part of the contact member is configured to be inserted into the first receiving part.3. The bicycle front derailleur according to claim 2 , whereinthe base member includes a second receiving part, andthe support member is configured to be inserted into the second receiving part.4. The bicycle front derailleur according to ...

DRIVE TRAIN AND SPROCKET ARRANGEMENT FOR HUMAN-POWERED VEHICLE

A drive train for a human-powered vehicle comprises a drive unit, a sprocket arrangement, and a total gear range quotient. The drive unit includes a motor configured to impart propulsion to the human-powered vehicle. The sprocket arrangement is operatively coupled to the drive unit. The sprocket arrangement comprises a plurality of rear sprockets and a plurality of gear ratios respectively corresponding to the plurality of rear sprockets. The plurality of gear ratios includes a largest gear ratio and a smallest gear ratio. The total gear range quotient is obtained by dividing the largest gear ratio by the smallest gear ratio. The total gear range quotient is larger than 5. 1. A drive train for a human-powered vehicle , comprising:a drive unit including a motor configured to impart propulsion to the human-powered vehicle;a sprocket arrangement operatively coupled to the drive unit, the sprocket arrangement comprising a plurality of rear sprockets and a plurality of gear ratios respectively corresponding to the plurality of rear sprockets, the plurality of gear ratios including a largest gear ratio and a smallest gear ratio; anda total gear range quotient obtained by dividing the largest gear ratio by the smallest gear ratio, the total gear range quotient being larger than 5.2. The drive train according to claim 1 , whereinthe total gear range quotient is equal to or larger than 7.3. The drive train according to claim 1 , whereinthe total gear range quotient is equal to or larger than 9.4. The drive train according to claim 1 , further comprising:a rear derailleur configured to shift a chain relative to the plurality of rear sprockets.5. The drive train according to claim 4 , further comprising:a front derailleur.6. The drive train according to claim 1 , further comprising:at least one internal transmission device.7. The drive train according to claim 6 , whereinthe at least one internal transmission device includes a rear internal transmission device configured to be ...

BICYCLE DRIVE SYSTEM

A bicycle drive system includes a front sprocket assembly having a first front sprocket and a second front-sprocket. The first front-sprocket has a first front-tooth number that is the largest tooth number in the front sprocket assembly. The second front-sprocket has a second front-tooth number that is less than or equal to the first front-tooth number. The second front-sprocket is adjacent to the first front-sprocket without another sprocket intervening therebetween in an axial direction. The first front-tooth number is less than or equal to 40. 1. A bicycle drive system comprising: a first front-sprocket having a first front-tooth number that is the largest tooth number in the front sprocket assembly; and', 'a second front-sprocket having a second front-tooth number that is less than or equal to the first front-tooth number, the second front-sprocket being adjacent to the first front-sprocket without another sprocket intervening therebetween in an axial direction;, 'a front sprocket assembly including'}the first front-tooth number being less than or equal to 40.2. The bicycle drive system according to claim 1 , whereinthe first front-tooth number divided by the second front-tooth number is less than or equal to 1.4.3. The bicycle drive system according to claim 1 , whereinthe first front-tooth number divided by the second front-tooth number is less than or equal to 1.2.4. The bicycle drive system according to claim 1 , whereinthe first front-tooth number is less than or equal to 34.5. The bicycle drive system according to claim 4 , whereinthe second front-tooth number is less than or equal to 30.6. The bicycle drive system according to claim 1 , further comprisinga rear sprocket assembly including a first rear-sprocket having a first rear-tooth number less than or equal to 10 and a second rear-sprocket having a second rear-tooth number greater than or equal to 44.7. The bicycle drive system according to claim 1 , whereinthe rear sprocket assembly further comprises ...

FRONT DERAILLEUR FOR A BICYCLE

A bicycle front derailleur that is movable between shift positions in association with an indexer. The inner mechanical end stop is adjusted at the first indexing position so there is no loosening of the control cable in the last downward gearshifting operation, with the benefit of an immediate and rapid response in the first upward gearshifting operation. The outer end stop is adjusted to interrupt the rotation of the cable-winding bush before it reaches the last indexing position. This pair of mechanical end stops limits the excursion of the derailleur to prevent it being able to shift the chain too much towards the frame or too much away from the frame, which ensures that the chain is not shifted beyond the gears. 1. A front derailleur for a bicycle , comprising:a movable body, provided with a chain guide configured to interact with a transmission chain of the bicycle and movable between a plurality of positions comprised between an inner position and an outer position;a fixed body, adapted for being fixed to a part of frame of the bicycle;an outer connection element hinged to the fixed body about a first articulation axis and hinged to the movable body about a second articulation axis;an inner connection element hinged to the fixed body about a third articulation axis and hinged to the movable body about a fourth articulation axis;a return member active between the movable body and the inner connection element to push said chain guide in said inner position; andan actuation arm hinged to the fixed body about said first articulation axis and comprising a fastener for a control cable arranged to move away from the first articulation axis on an opposite side with respect to the second articulation axis;said actuation arm and said outer connection element being rigidly connected to make a rocker arm when a force exerted on said fastener is such as to determine a movement of the chain guide between the inner position and the outer position, said actuation arm ...

FRONT DERAILLEUR

A front derailleur basically includes a fixed member, a movable member, a driven link and a first link. The fixing member is configured to be fixed to a bicycle frame. The movable member is movably supported with respect to the fixed member. The driven link is operatively coupled to the movable member. The first link movably connects the movable member to the fixed member, and is adjustably coupled to the driven link in a fixed position by a fixing structure to establish a fixed rest position of the movable member with respect to the fixed member. 1. A front derailleur comprising:a fixed member configured to be fixed to a bicycle frame;a movable member movably supported with respect to the fixed member;a driven link operatively coupled to the movable member; anda first link movably connecting the movable member to the fixed member and adjustably coupled to the driven link in a fixed position by a fixing structure to establish a fixed rest position of the movable member with respect to the fixed member.2. The front derailleur according to claim 1 , whereinthe first link and the driven link are pivotally mounted on the fixed member about a single pivot axis.3. The front derailleur according to claim 2 , whereinthe fixing structure abuts opposite circumferentially facing sides of the driven link with respect to the pivot axis to establish the fixed rest position of the movable member.4. The front derailleur according to claim 1 , whereinthe fixing structure includes a first bolt screwed into one of the first link and the driven link and abutting the other of the first link and the driven link, and a second bolt mounted on the one of the first link and the driven link and threaded into a. movable abutment member that moves axially along a threaded shaft of the second bolt and that abuts the other of the first link and the driven link as the second bolt is turned about its screwing axis.5. The front derailleur according to claim 4 , whereinthe other of the first link and ...

FRONT DERAILLEUR

A front derailleur includes a base member, a chain guide, a link mechanism and a cable guiding structure. The base member is fixedly coupled to a bicycle. The chain guide is configured to guide a chain. The link mechanism movably couples the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable. The cable guiding structure has one of bore, recess and groove formed on the link mechanism to guide the operation cable. The operation cable exits forwardly from the cable guiding structure within a sector having an angle of 150 degrees around the crank axis from an upper radius lying in a first plane that is perpendicular to a second plane containing a crank axis and a rear wheel axis. 1. A front derailleur attachable to a bicycle having a crank axis and a rear wheel axis which is parallel to the crank axis , the front derailleur comprising:a base member configured to be fixedly coupled to the bicycle;a chain guide configured to guide a chain; anda link mechanism movably coupling the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable; anda cable guiding structure having one of bore, recess and groove formed on the link mechanism to guide the operation cable such that the operation cable exits forwardly from the cable guiding structure within a sector having an angle of 150 degrees around the crank axis from an upper radius lying in a first plane that is perpendicular to a second plane containing the crank axis and the rear wheel axis.2. The front derailleur according to claim 1 , whereinthe link mechanism includes a first link and a second link, the first link is arranged closer to a vertical center plane of the bicycle frame than the second link while the base member is coupled to the bicycle.3. The front derailleur according to claim 2 , whereinthe first link includes a lateral protruding part having the one of the ...

KITS TO CONVERT SINGLE-SPEED BICYCLES TO MULTI-SPEED BICYCLES

Kits for converting a single-speed bicycle to a multi-speed bicycle are described. Such kits typically include a front chainring set having 2-5 differently-sized front chainrings, a front derailleur compatible with the front chainring set, a front derailleur shifting assembly compatible with the front derailleur, a chain tensioner, and a chain sized to accommodate the gearing provided by the plurality of front chainrings and the existing or new rear sprocket(s) to be fitted to the rear wheel of the bicycle undergoing the conversion. 1. A kit to convert a used , single-speed bicycle to a multi-speed bicycle , the kit comprising:a. a front chainring set that comprises 2-5 front chainrings, each of a different size or tooth count;b. a front derailleur compatible with the front chainring set;c. a front derailleur shifting assembly compatible with the front derailleur;d. a chain tensioner; ande. a chain sized to span gearing from the largest front chainring to the smallest front chainring when included in a bicycle drive train that includes the front chainring set, the chain tensioner, and a rear sprocket attached to a rear bicycle wheel mounted on a bicycle.2. A kit according to that further comprises one claim 1 , some claim 1 , or all of the following:a. a rear sprocket;b. a crank assembly configured for use with the front chainring set, wherein the crank assembly comprises (i) a one-piece crank or (ii) two crank arms and a spindle;c. a front handbrake system;d. a rear handbrake system;e. pedals configured for assembly with the crank assembly; and/orf. a bottom bracket.3. A kit according to that further comprises one claim 2 , some claim 2 , or all of the following:a. a front wheel configured for use with the front handbrake system;b. a rear wheel configured for use with the rear handbrake system;c. a front tire configured for use with the front wheel; and/ord. a rear tire configured for use with the rear wheel.4. A kit according to that further comprises instructions ...

Bicycle derailleur

A bicycle derailleur comprising a chain guide movable between intermediate positions. An actuation arm associated with the derailleur has a cable seat formed it. A cable-clamping washer includes with a cable-bending appendage that is insertable in the seat of the actuation arm. The actuation arm cooperates with the cable-bending appendage to lock an actuation cable in the desired position.

BICYCLE DERAILLEUR

A derailleur comprising a chain guide, a fixed body adapted for being fixedly associated with a part of frame of the bicycle, and an actuation arm hinged to the fixed body. A cable-clamping washer constrained to the actuation arm locks a control cable on the actuation arm. A first fastening station and a second fastening station are defined on said actuation arm and configured to fasten the control cable in different positions on the actuation arm. An anti-rotation appendage projecting from the chain-clamping washer is adapted for being inserted in a holding seat of the actuation arm and holding the control cable in at least one of the first and the second fastening stations. 1. A bicycle derailleur , comprising:a chain guide configured to interact with a transmission chain of the bicycle and movable between a plurality of intermediate positions comprised between an inner position and an outer position;a fixed body adapted for being fixedly associated with a part of frame of the bicycle;an outer connection element rotatably connected to the fixed body about a first articulation axis (A) and rotatably connected to the chain guide about a second articulation axis (B) parallel to the first articulation axis (A);an inner connection element rotatably connected to the fixed body about a third articulation axis (C) and to the chain guide about a fourth articulation axis (D);an actuation arm hinged to the fixed body about the first articulation axis (A);a cable-clamping washer configured for being fixedly connected to the actuation arm and configured for locking a control cable on the actuation arm,a first fastening station and a second fastening station defined on said actuation arm and configured to fasten the control cable in different positions on the actuation arm;an anti-rotation appendage projecting from said cable-clamping washer and configured for being inserted in a holding seat of the actuation arm, in at least one from the first and the second fastening station. ...

FRONT DERAILLEUR

A front derailleur is basically provided with abuse member, a chain guide, a link mechanism and a cable guiding structure. The base member is fixedly coupled to a bicycle. The chain guide is configured to guide a chain. The link mechanism movably couples the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable. The link mechanism includes a cable attachment portion that is configured to be attached to the operation cable. The cable guiding structure guides the operation cable from the cable attachment portion. The cable guiding structure is disposed on at least one of the base member and the link mechanism. The cable guiding structure has a cable exit that is arranged such that the operation cable exits forwardly from the cable guiding structure towards the front of the bicycle. 1. A front derailleur attachable to a bicycle having a crank axis and a rear wheel axis which is parallel to the crank axis , the front derailleur comprising:a base member configured to be fixedly coupled to the bicycle;a chain guide configured to guide a chain;a link mechanism movably coupling the chain guide to the base member between a retracted position and an extended position in response to movement of an operation cable, the link mechanism including a cable attachment portion that is configured to be attached to the operation cable; anda cable guiding structure configured to guide the operation cable from the cable attachment portion, the cable guiding structure being disposed on at least one of the base member and the link mechanism, the cable guiding structure having a cable exit that is arranged such that the operation cable exits forwardly from the cable guiding structure within a sector having an angle of 150 degrees around the crank axis from an upper radius lying in a first plane that is perpendicular to a second plane containing the crank axis and the rear wheel axis.2. The front derailleur according ...

BICYCLE FRONT DERAILLEUR

A front derailleur that includes a fixing member that is configured to be fixed to a bicycle frame, a chain guide movable between a retracted position and an extended position with respect to the fixing member, a linkage mechanism coupling the chain guide to the fixing member, and a biasing member that biases the chain guide toward one of the retracted position and the extended position. The linkage mechanism includes a first link member that is pivotable with respect to the fixing member about a first axis and is pivotable with respect to the chain guide about a second axis that is positioned above the first axis when the fixing member is fixed to the bicycle frame. The biasing member is coaxially arranged around the second axis. 1. A front derailleur comprising:a fixing member that is configured to be fixed to a bicycle frame;a chain guide movable between a retracted position and an extended position with respect to the fixing member;a linkage mechanism coupling the chain guide to the fixing member, the linkage mechanism including a first link member being pivotable with respect to the fixing member about a first axis and being pivotable with respect to the chain guide about a second axis that is positioned above the first axis when the fixing member is fixed to the bicycle frame; anda biasing member that biases the chain guide toward one of the retracted position and the extended position, the biasing member coaxially arranged around the second axis.2. The front derailleur of wherein the first link member includes a first arm and a second arm that both extend between the first and second axes respectively claim 1 , and wherein the biasing member is disposed between the first arm and the second arm.3. The front derailleur of wherein the linkage mechanism further includes a second link member that is pivotable with respect to the fixing member about a third axis and that is pivotable with respect to the chain guide about a fourth axis that is positioned above the ...

Device for shifting the chain on a front chain wheel for a bicycle

A shifting assembly for shifting a roller chain between a plurality of front chain wheels for a bicycle that includes a smaller chain wheel, a larger chain wheel and a chain derailleur having a channel on an inner guide plate. The channel has an elevation that comes into contact with a chain rise rivet on the larger chain wheel in the state of starting to shift the roller chain from the smaller chain wheel to the adjacent larger chain wheel, viewed in a direction parallel to the axis of rotation of the chain wheels. 19-. (canceled)10. A shifting assembly for shifting a roller chain having alternating pairs of inner and outer link plates between a plurality of front chain wheels for a bicycle , the shifting assembly comprising:a smaller chain wheel;a larger chain wheel having a chain rise rivet; anda chain derailleur having a channel on an inner guide plate,the channel having an elevation contacting the chain rise rivet when the chain rise rivet on the larger chain wheel starts to engage into the space between a pair of outer link plates of the roller chain when shifting the roller chain from the smaller chain wheel to the adjacent larger chain wheel, viewed in a direction parallel to the axis of rotation of the chain wheels.11. The shifting assembly of claim 10 , wherein the larger chain wheel includes a selection rib and a distance claim 10 , determined in a direction parallel to the longitudinal expanse of the roller chain claim 10 , at the time shifting of the roller chain to the adjacent larger chain wheel starts claim 10 , between the selection rib and the chain rise rivet claim 10 , corresponds to an odd multiple of the chain pitch.12. The shifting assembly of claim 11 , wherein the distance between the selection rib and the chain rise rivet corresponds to a single chain pitch.13. The shifting assembly of claim 10 , wherein the smaller chain wheel has twenty-two teeth and the larger chain wheel has thirty-four teeth.14. The shifting assembly of claim 10 , ...

Automatic Bicycle Shifter and Shifting Cable Actuator

An automatic bicycle shifter making use of a sheathed cable actuator utilizing a pulley arrangement to energize actuation cable thereof with high adaptability to single and double cable arrangement devices and provided with a gearbox employing a worm gearset for positive retention of actuated position and an encoder for accurate and programmable operation. 1- a bicycle shifting cable actuator comprising ,a) a housing including a main cylindrical cavity and a thereto rotationally operable cable pulley,b) said housing including a second cylindrical cavity concentric to said main cylindrical cavity fitted for receiving a shaft of a gearmotor secured to said housing,c) said shaft of said gearmotor extending into said main cavity and into concentric bore of said cable pulley,d) said shaft and said cable pulley fitted with matching keyslots for receiving a matching key for rotational retention thereof,e) said housing further including a cylindrical passage tangential to said main cylindrical cavity fitted for operation of an actuation cable of a sheathed cable assembly and a thereto concentric tapped bore fitted for mounting of a fitting for receiving said sheathed cable assembly,f) said cable pulley further including a cable clamp and a fastening screw for positive retention of said actuation cable,Whereby actuation of said gearmotor provides energization of said actuation cable through actuation of said cable pulley in rotational direction thereof.2- The bicycle shifting cable actuator of wherein said gearmotor further includes a position encoder.3- The bicycle shifting cable actuator of wherein said gearmotor further includes a worm gearset for positive retention of rotational position of said shaft claim 1 , said cable pulley and said actuation cable.4- The bicycle shifting cable actuator of wherein said housing further includes a second cylindrical cavity extending from said housing in a perpendicular direction to said main cylindrical cavity and including a ...

BICYCLE FRONT DERAILLEUR

A bicycle front derailleur is provided that can be easily coupled to a bicycle frame. The bicycle front derailleur includes a base member, a chain guide and a link mechanism. The base member is configured to be coupled to a bottom bracket hanger of the bicycle frame. The chain guide is configured to guide a chain. The link mechanism connects the chain guide to the base member to move the chain guide between a retracted position and an extended position. The base member includes a recess configured to accommodate a part of the chain guide in a state where the chain guide is located at the retracted position. 1. A bicycle front derailleur comprising:a base member configured to be coupled to a bottom bracket hanger of a frame of a bicycle;a chain guide configured to guide a chain; anda link mechanism connecting the chain guide to the base member to move the chain guide between a retracted position and an extended position,the base member including a recess configured to accommodate a part of the chain guide in a state where the chain guide is located at the retracted position.2. A bicycle front derailleur comprising:a base member configured to be coupled to a bottom bracket hanger of a frame of a bicycle;a chain guide configured to guide a chain; anda link mechanism connecting the chain guide to the base member to move the chain guide between a retracted position and an extended position,the link mechanism being configured so that the chain guide moves in a front-rear direction of the bicycle as the chain guide moves between the retracted position and the extended position in a state where the base member is coupled to the frame.3. The bicycle front derailleur according to claim 1 , wherein a frame coupling portion including a first coupling opening into which a first bolt is inserted to couple the base member to the frame, and', 'a link support portion pivotally supporting the link mechanism., 'the base member includes'}4. The bicycle front derailleur according to ...

Bicycle Front Derailleur with Mounting Bracket

A bicycle front derailleur including a chain guide; a linkage assembly; and a mounting bracket configured to mount the chain guide to a bicycle frame such that the chain guide is movable with respect to the mounting bracket. The mounting bracket includes at least one fixed portion adapted to receive a fastener to fix the fixed portion so that an axis of the fastener extends toward a bottom bracket hangar of the bicycle frame when the fixed portion is fixed to the bicycle frame via the fastener. The axis of the fastener is generally vertical.

FORWARD AND REVERSE PEDALLING SYSTEM FOR A BICYCLE

A forward and reverse pedaling system for a bicycle with automatic gear change replacing the derailleur and clutch operating at a very low speed using an engagement wheel (), all enclosed within a housing case filled with oil. The two wheels () and (), which are themselves driven by rods () and (), make a reciprocating to and fro motion of less than a half turn regardless of the direction of rotation of the drive wheel () and drive the wheel () followed by the driven wheel () via the low speed clutch between the wheels () and (). This system can be applied to any mechanical assembly in which it is required, and is not limited to use in bicycles. 11611139101171811131212111381281521416. Pedaling system for forward and reverse pedaling for a bicycle with automatic gear change replacing the derailleur and clutch functioning at very low speed , characterized in that it uses an engagement wheel () , the whole enclosed in a housing case filled with oil , the two wheels () and () themselves driven by the rods () and () make a reciprocating to and fro movement of less than half a turn regardless of the direction of rotation of the drive wheel () , the pawls () and () on the wheels () and () , each provided with a small spring for being applied to the toothed wheel () as in a free wheel , alternately drive the wheel () , the wheels () and () are mounted on ball bearings with respect to the spindle () , the wheel () is secured to the spindle () and the wheel () in order to transmit the movement to the driven wheel () by the pawl () and the engagement wheel ().25169106119673167391011131961234. Pedaling system according to claim 1 , characterized in that it comprises a wheel () in the case secured to the driving wheel () outside the case and provided with a variable-length arm with a small rod () claim 1 , which modifies the travel of the large rods () and () and causes a gear change claim 1 , the small rod () is connected by ball bearings on its two spindles claim 1 , the ...

BICYCLE FRONT DERAILEUR

A bicycle front derailleur is basically provided with a base member, a chain guide and a chain restricting abutment. The base member is configured to be mounted on a bicycle frame. The chain guide is configured to be movably coupled to the base member between a retracted position and an extended position to move a bicycle chain. The chain restricting abutment is configured to restrict the bicycle chain from moving in a radially outward direction of a rotational center axis of a bicycle front sprocket when the base member is mounted on the bicycle frame and the chain guide moves from the extended position toward the retracted position. 1. A bicycle front derailleur comprising:a base member configured to be mounted on a bicycle frame,a chain guide configured to be movably coupled to the base member between a retracted position and an extended position to move a bicycle chain; anda chain restricting abutment configured to restrict the bicycle chain from moving in a radially outward direction of a rotational center axis of a bicycle front sprocket when the base member is mounted on the bicycle frame and the chain guide moves from the extended position toward the retracted position.2. The bicycle front derailleur according to claim 1 , whereinthe chain guide includes an inner guide plate and an outer guide plate, the outer guide plate including a base plate portion and a chain guiding portion protruding from the base plate portion toward the inner guide plate, the chain guiding portion being configured to contact a side surface of the bicycle chain when the base member is mounted on the bicycle frame and the chain guide moves from the extended position toward the retracted position, a first axial distance defined between the chain restricting abutment and the inner guide plate being smaller than a second axial distance defined between the chain guiding portion and the inner guide plate.3. The bicycle front derailleur according to claim 1 , whereinthe chain restricting ...

BICYCLE DERAILLEUR, CHAIN GUIDE ASSEMBLY AND STRUCTURAL REINFORCEMENT SHEET THEREOF

The disclosure provides a chain guide assembly configured to be mounted on a linkage assembly of a bicycle derailleur. The chain guide assembly includes an inner plate, an outer plate, a first connecting bridge and a second connecting bridge. The outer plate is spaced apart from the inner plate. Two opposite sides of the first connecting bridge are respectively connected to the inner plate and the outer plate. Two opposite sides of the second connecting bridge are respectively connected to the inner plate and the outer plate. The inner plate, the outer plate, the first connecting bridge, and the second connecting bridge are made of a single piece. In addition, the disclosure also provides a bicycle derailleur having the chain guide assembly and a structural reinforcement sheet of the chain guide assembly. 1. A chain guide assembly , configured to be mounted on a linkage assembly of a bicycle derailleur , comprising:an inner plate;an outer plate, spaced apart from the inner plate;a first connecting bridge, wherein two opposite sides of the first connecting bridge are respectively connected to the inner plate and the outer plate; anda second connecting bridge, wherein two opposite sides of the second connecting bridge are respectively connected to the inner plate and the outer plate;wherein the inner plate, the outer plate, the first connecting bridge, and the second connecting bridge are made of a single piece.2. The chain guide assembly according to claim 1 , wherein the inner plate claim 1 , the outer plate claim 1 , the first connecting bridge claim 1 , and the second connecting bridge are made of non-metallic materials.3. The chain guide assembly according to claim 2 , wherein materials of the inner plate claim 2 , the outer plate claim 2 , the first connecting bridge claim 2 , and the second connecting bridge all comprise carbon fiber compound or glass fiber compound.4. The chain guide assembly according to claim 2 , further comprising at least one first ...

BICYCLE TRANSMISSION APPARATUS AND BICYCLE DRIVE UNIT

A bicycle transmission apparatus comprises a base member, a first transmission member, a second transmission member, a first coupling member, a first guide structure, a switching device, and a transmission controller. The switching device is configured to switch a position of the first transmission member relative to the base member in an axial direction between a first axial position and a second axial position. The transmission controller is configured to control the switching device and the first guide structure so as not to change a first engagement state of the first coupling member from one cogwheel to another adjacent cogwheel among first cogwheels when the first transmission member moves relative to the base member in association with a movement of the first guide structure relative to the base member to change a second engagement state of the first coupling member from one cogwheel to another adjacent cogwheel among second cogwheels. 1. A bicycle transmission apparatus comprising:a base member;a first transmission member rotatable relative to the base member about a first rotational axis and movable relative to the base member in an axial direction parallel to the first rotational axis, the first transmission member including first cogwheels arranged in the axial direction, the first cogwheels having different outer diameters;a second transmission member rotatable relative to the base member about a second rotational axis and stationary relative to the base member in the axial direction, the second transmission member including second cogwheels arranged in the axial direction, the second cogwheels having different outer diameters; a first engagement state where the first coupling member is engaged with one of the first cogwheels, and', 'a second engagement state where the first coupling member is engaged with one of the second cogwheels;, 'a first coupling member configured to couple the first transmission member to the second transmission member to ...

ADJUSTMENT MECHANISM AND WHEEL DRIVE

The present disclosure describes a gearshift mechanism for adjusting a gear ratio between a traction means, such as a chain, and a multi-sprocket gear set which can be rotated around an axle. The gearshift mechanism is configured to move the traction means in relation to the sprockets, such that an adjustment element is moved into the rolling motion of the traction means, thereby causing movement off of one sprocket and movement onto another sprocket. 115-. (canceled)16. A gearshift for adjusting a traction means on a gear set which can be rotated around an axle , the gear set including two or more sprockets around which the traction means may loop , the gearshift comprising:at least one adjustment element that co-rotates with the gear set, wherein the at least one adjustment element is configured to be moved into a rolling motion of the traction means to cause movement of the traction means from one of the sprockets of the gear set to another of the sprockets of the gear set.17. The gearshift according to claim 16 , wherein the adjustment element comprises a switch pivotable around an axis of rotation which is radially spaced from the axle and is located on a plane that extends in a traverse direction relative to the axle.18. The gearshift according to claim 17 , further comprising a shifter of the switch that extends away from the axis of rotation claim 17 , which is radially spaced relative to the axle between the sprockets;wherein a first switch segment protrudes from the shifter and is arranged radially outside of a smaller first sprocket; andwherein a second switch segment protrudes from the shifter and is arranged radially outside of a larger second sprocket.19. The gearshift according to claim 17 , wherein the switch comprises a rotating shaft that extends along the axis of rotation radially arranged relative to the axle and whereby the switch extends from a side of the rotating shaft.20. The gearshift according to claim 19 , wherein the switch has a first ...

BICYCLE FRONT DERAILLEUR

A bicycle front derailleur is basically provided with a base member, a movable member, an electric driving unit and a biasing member. The base member includes a bicycle mounting portion. The movable member is movably supported with respect to the base member between a first position and a second position that is farther than the first position from the base member. The electric driving unit is operatively coupled to the movable member to move the movable member between the first position and the second position. The biasing member is operatively disposed between the base member and the movable member to bias the movable member towards the second position. 1. A bicycle front derailleur comprising:a base member including a bicycle mounting portion;a movable member movably supported with respect to the base member between a first position and a second position that is farther than the first position from the base member;an electric driving unit operatively coupled to the movable member to move the movable member between the first position and the second position; anda biasing member operatively disposed between the base member and the movable member to bias the movable member towards the second position.2. The bicycle front derailleur according to claim 1 , further comprisesa connecting structure movably connecting the movable member to the base member, and the electric driving unit having an output shaft linked to the connecting structure.3. The bicycle front derailleur according to claim 2 , whereinthe biasing member includes a torsion spring that has a first end applying a biasing force against the movable member, a second end applying a biasing force against the connecting structure, and a coiled portion disposed between the first and second ends.4. The bicycle front derailleur according to claim 3 , whereinthe connecting structure further includes a first support link and a second support link, the first and second support links have first ends pivotally attached ...

DEVICE FOR ADJUSTING THE TENSIONING OF A CONTROL CABLE OF A BICYCLE GEARSHIFT

An adjustment device for tensioning a bicycle gearshift control cable. The adjustment device has opposed threaded elements and a compressible element, which is retained in position by a locking member and compressed between the threaded elements. 1. A adjustment device for adjusting the tensioning of a control cable of a bicycle gearshift , the device comprising: a pair of elements coupled to each other through respective threadings extending along a longitudinal axis , each element of said pair of elements comprising a respective through cavity extending along said longitudinal axis for passage of said cable , wherein:a first element of said pair of elements comprises an end portion provided with an outer threading and, at an opposite end portion thereof, a first housing seat for housing an end portion of a first protective sheath of a first length of said cable;a second element of said pair of elements comprises a hollow portion provided with an inner threading engaged with said outer threading and, at a free end portion thereof distal from said first element, a second housing seat for housing an end portion of a second protective sheath of a second length of said cable; and,said adjustment device further comprising a helical spring arranged coaxially to said outer threading and held in a compressed state between a first shoulder defined in said first element and a second shoulder defined in said second element and, at at least one of said first and second shoulders, a plurality of locking grooves for locking a respective free end of said helical spring.2. The adjustment device according to claim 1 , wherein each groove of said plurality of grooves extends along a substantially radial direction with respect to said longitudinal axis.3. The adjustment device according to wherein said plurality of grooves is made on a washer which is in abutment on one of said first and second shoulders.4. The adjustment device according to claim 3 , wherein said washer in abutment ...

ADJUSTMENT MECHANISM AND DRIVE

The present disclosure describes a gearshift mechanism for adjusting a gear ratio between a traction means, such as a chain, and a multi-sprocket gear set which can be rotated around an axle. The gearshift mechanism is configured to move the traction means in relation to the sprockets, such that an adjustment element is moved into the rolling motion of the traction means, thereby causing movement off of one sprocket and movement onto another sprocket. 1. A gearshift comprising:a switch configured to co-rotate with a plurality of sprockets coupled to an axle, such that the switch and the sprockets rotate about a first rotational axis defined by the axle; andan electrical control device configured to co-rotate about the first rotational axis along with the switch and the plurality of sprockets;wherein the electrical control device is configured to control the switch to selectively divert a traction device from a first sprocket of the plurality of sprockets to a second sprocket of the plurality of sprockets.2. The gearshift of claim 1 , wherein the switch is pivotable about a second axis of rotation radially spaced from the axle claim 1 , such that the second axis of rotation is non-coplanar with the first axis of rotation.3. The gearshift of claim 2 , wherein the switch comprises:a switch body pivotable about the second axis of rotation,a first switch segment extending from the switch body at a first position along the switch body, the first position being disposed radially outward of the first sprocket, relative to the axle, such that rotation of the switch about the second rotational axis enables the first switch segment to divert the traction device from the first sprocket; anda second switch segment extending from the switch body at a second position along the switch body, the second position being disposed radially outward of the second sprocket, relative to the axle, such that rotation of the switch about the second rotation axis selectively enables the second ...

BICYCLE FRAME WITH FRONT DERAILLEUR MOUNTING STRUCTURE

A bicycle frame includes a first frame member and a second frame member configured to be pivotally connected to the first frame member about a pivot axis. The first frame member includes a threaded hole, through which a fixing bolt for fixing a mounting member of a bicycle front derailleur to the first frame member passes, and an abutting portion configured to restrict rotation of a mounting member of a bicycle front derailleur around the fixing bolt by abutting the mounting member. The threaded hole is located on a front side of the pivot axis. 1. A bicycle frame comprising:a first frame member anda second frame member configured to be pivotally connected to the first frame member about a pivot axis, whereinthe first frame member includes a threaded hole through which a fixing bolt for fixing a mounting member of a bicycle front derailleur to the first frame member passes and includes an abutting portion configured to restrict rotation of the mounting member around the fixing bolt by abutting the mounting member of the bicycle front derailleur, andthe threaded hole is located on a front side of the pivot axis.2. The bicycle frame according to claim 1 , wherein the first frame member is a chain stay of the bicycle frame claim 1 , and the second frame member is a seat tube of the bicycle frame.3. The bicycle frame according to claim 1 , wherein the abutting portion is located on the front side of the pivot axis.4. The bicycle frame according to claim 1 , wherein the abutting portion is elongated and extends in a longitudinal direction of the second frame member.5. The bicycle frame according to claim 1 , wherein the abutting portion is one of a protrusion and an elongated recess.6. A bicycle frame comprising:a second frame member anda first frame member configured to be pivotally connected to the second frame member about a pivot axis, wherein the second frame member includes a bottom bracket hanger to which a bottom bracket is attached, whereinthe first frame member ...

ELECTRIC FRONT DERAILLEUR

An electric front derailleur is basically provided with a base, a chain guide, a linkage and an electric motor unit. The base is configured to be mounted to a bicycle. The chain guide is configured to guide a chain. The linkage movably couples the chain guide to the base in a forward-rearward direction to move the chain guide between a retracted position and an extended position in a mounted state where the base is mounted to the bicycle. The electric motor unit is supported on the base and operatively coupled to the linkage to move the chain guide between the retracted position and the extended position. The electric motor unit is arranged at least partly closer to the bicycle than the chain guide. 1. An electric front derailleur comprising:a base configured to be mounted to a bicycle;a chain guide configured to guide a chain;a linkage movably coupling the chain guide to the base in a forward-rearward direction to move the chain guide between a retracted position and an extended position in a mounted state where the base is mounted to the bicycle; andan electric motor unit supported on the base and operatively coupled to the linkage to move the chain guide between the retracted position and the extended position, the electric motor unit being arranged at least partly closer to a bicycle frame of the bicycle than the chain guide.2. An electric front derailleur comprising:a base configured to be mounted to a bicycle;a chain guide including an inner guide plate and an outer guide plate, the inner guide plate and the outer guide plate being arranged along a guiding direction;a linkage movably coupling the chain guide to the base to move the chain guide between a retracted position and an extended position; andan electric motor unit supported on the base and operatively coupled to the linkage to move the chain guide between the retracted position and the extended position, the electric motor unit being arranged so as to at least partly overlap with the chain guide while ...

Cable guide system for derailleur for bicycles has deflection pulley with two different curved cable tracks for cable deflection through more than 120o to improve efficiency

The derailleur is fastened to the bicycle via an upper joint head (3) with gear shifter (4) operated by a Bowden cable (7). The cable passes over a deflection pulley (6) connected to the joint head via a holder (5). The pulley has a first curved track (R1) to act as support for the cable coming from the distant control, and a second curved track (R2) as support for the cable leading to the gear shifter. The two tracks are at different distances relative to the pivot center of the pulley, to form a transmission, to adapt the cable movements of the distant control to the cable movement required for the gear shifter.

Operation structure of bicycle motion device

Adjusting and changing device of front-gear-disc transmission of bicycle

本发明涉及一种自行车前齿盘变速器的调变装置，包含有：一管状外壳；一曲柄轴，设有一轴孔枢设在管状外壳中，两端突伸出管状外壳外，左侧外露端设有一长形槽孔；一行星齿轮变速装置，设在曲柄轴右侧外露端，受曲柄轴驱动转动；一控制杆，容置在曲柄轴轴孔中；一拨杆，穿设在控制杆容置在曲柄轴的长形槽孔中，两端突伸出长形槽孔外，随该曲柄轴同步转动；一变速环，设在曲柄轴左侧外露端，不随曲柄轴转动，变速环与拨杆连接，并带动拨杆沿长形槽孔移位，变速环外环面设有一导引槽；一导引销，与管状外壳固定；一牵引盘，设于管状外壳，可受外力牵引转动一角度，并联动变速环转动。

Piezo electric inkjet printer head

본 발명은 압전방식 잉크젯 프린터 헤드에 관한 것으로, 더욱 구체적으로는 액츄에이터의 구동에 의해 잉크가 채워진 잉크챔버의 부피가 변화하면서 발생되는 압력으로 노즐을 통해 잉크가 토출되어지되 노즐 직경보다 작은 직경의 미세한 액적의 잉크 토출에 의해 세선화가 가능하도록 한 압전방식 잉크젯 프린터 헤드에 관한 것이다. 즉, 본 발명의 압전방식 잉크젯 프린터 헤드는 상부전극, 하부전극 및 그 사이에 삽입되는 압전판과, 상기 하부전극의 하측에 배치되어 진동판으로 구성되는 액츄에이터부와, 상기 진동판의 하측에 공간이 형성되어 잉크가 채워지는 잉크챔버와, 상기 잉크챔버의 하측부를 형성하고 상기 진동판과 대향되는 면에 노즐이 형성된 노즐판과, 상기 잉크챔버의 상부 일측에 형성되어 잉크를 공급하기 위한 잉크주입부와, 상기 노즐판의 외측면은 노즐 주위에 전계형성을 하기 위한 전계형성 전극판이 부착된 것을 특징으로 한다. The present invention relates to a piezoelectric inkjet printer head, and more particularly, ink is discharged through a nozzle at a pressure generated by a change in the volume of an ink chamber filled with ink by an actuator, but the diameter is smaller than the nozzle diameter. The present invention relates to a piezoelectric inkjet printer head capable of thinning by ejecting droplets of ink. That is, the piezoelectric inkjet printer head of the present invention includes an upper electrode, a lower electrode, and a piezoelectric plate inserted therebetween, an actuator portion disposed below the lower electrode and composed of a diaphragm, and a space formed below the diaphragm. And an ink chamber filled with ink, a nozzle plate having a lower side of the ink chamber and a nozzle formed on a surface of the ink chamber opposite to the diaphragm, and an ink injection portion formed on an upper side of the ink chamber to supply ink; The outer surface of the nozzle plate is characterized in that the field-forming electrode plate for the electric field formation around the nozzle is attached.

Transmission case for bicycles

本发明的目的是改变自行车的变速器传动比，并且尽可能减小变速器尺寸。位于独特定位的两个齿轮组(2、3)之间的拨链器是本发明的新式、先进且重要的装置。两个齿轮组(2、3)具有平行但相反的旋转轴，从而主齿轮组(2)的大直径齿轮(5)对应于副齿轮组(3)的小直径齿轮(6)。主齿轮组组装于主轴上，并且通过主封闭环式滚子链(8)连接着副齿轮组；副齿轮组(3)支撑着单一的外部齿轮(15)，外部齿轮通过副链(8)连接至后轮。当拨链器被从外部驱动时，其将主链(8)偏移到具有不同直径的主副齿轮组(2、3)上，从而实现换档。

Transmission apparatus for a bicycle

A transmission apparatus (T) is capable of retaining an endless transmission chain (48) on a rotatable member (30, 40), even where a small inter-axis distance remains between two rotatable shafts (11, 24) to which each of two rotatable members (30, 40) is drivingly connected. The transmission (T) includes a drive sprocket member (30) for connecting to a main drive shaft (11). The transmission (T) also includes a driven sprocket member (40), connected to the output shaft (24) in parallel with the main drive shaft (11) and including a plurality of transmission sprockets (41-47). The transmission (T) further includes a chain (48) interconnecting both sprocket members (30, 40), and a transmission shift mechanism (M2) for positioning the chain (48) among the transmission sprockets (31, 41-47). The drive sprocket member (30) is supported at the main drive shaft (11) in the rotary center line direction, in such a way that the chain (48) is applied to both sprocket members (30, 40) in parallel with a plane crossing at a right angle with the rotary center line of the main drive shaft (11).

Bicycle front derailleur with angle adjustment

DEVICE FOR CONTROL OF THE TRANSLATION MOVEMENTS PARTICULARLY CHAIN DERAILLEUR FOR BIKE CLETTE

FRONT DERAILLEUR OF BIKE WHICH SYNCHRONIZES ITS DISPLACEMENTS WITH REVERSE SPEED CHANGE MOVEMENTS

Patent FR2294079B1

FRONT DERAILLEUR FOR A BICYCLE

LA PRESENTE INVENTION SE RAPPORTE A UN DERAILLEUR AVANT POUR UNE BICYCLETTE. SELON L'INVENTION IL EST POURVU D'UN MECANISME DE LIAISON COMPRENANT UN ORGANE DE FIXATION 1, UN GUIDE-CHAINE 2, AYANT UNE PLAQUE INTERNE DE GUIDAGE 21 ET UNE PLAQUE EXTERNE DE GUIDAGE 22 ET DES ORGANES DE LIAISON 31, 32 SUPPORTANT LE GUIDE-CHAINE A L'ORGANE DE FIXATION, AINSI QUE DE PIVOTS 4 A 7 POUR SUPPORTER LES ORGANES DE LIAISON SUR L'ORGANE DE FIXATION ET LE GUIDE-CHAINE, L'AXE DE CHAQUE PIVOT ETANT OBLIQUE VERS L'AVANT EN DIRECTION LONGITUDINALE DE LA BICYCLETTE, LORSQUE LE DERAILLEUR AVANT Y EST MONTE, DE LA PERPENDICULAIRE S'ETENDANT TRANSVERSALEMENT A LA LIGNE CENTRALE ENTRE LES PLAQUES DE GUIDAGE, L'EXTREMITE AVANT DE CHAQUE PIVOT ETANT ELOIGNEE DU GUIDE-CHAINE PAR RAPPORT A L'EXTREMITE ARRIERE. L'INVENTION S'APPLIQUE NOTAMMENT A L'INDUSTRIE DU CYCLE. THE PRESENT INVENTION RELATES TO A FRONT DERAILLEUR FOR A BICYCLE. ACCORDING TO THE INVENTION IT IS PROVIDED WITH A CONNECTION MECHANISM INCLUDING A FIXING MECHANISM 1, A CHAIN GUIDE 2, HAVING AN INTERNAL GUIDE PLATE 21 AND AN EXTERNAL GUIDANCE PLATE 22 AND CONNECTION MEMBERS 31, 32 SUPPORTING THE CHAIN GUIDE TO THE FIXING BODY, AS WELL AS 4 TO 7 PIVOTS TO SUPPORT THE LINKAGES ON THE FIXING BODY AND THE CHAIN GUIDE, THE AXLE OF EACH PIVOT BEING OBLIQUE FORWARD IN LONGITUDINAL DIRECTION FROM THE BICYCLE, WHEN THE FRONT DERAILLEUR IS MOUNTED ON IT, FROM THE PERPENDICULAR EXTENDING TRANSVERSALLY TO THE CENTER LINE BETWEEN THE GUIDE PLATES, THE FRONT END OF EACH PIVOT BEING AWAY FROM THE GUIDE BAR FROM THE REAR END. THE INVENTION APPLIES IN PARTICULAR TO THE CYCLE INDUSTRY.

FRONT DERAILLEUR FOR A BICYCLE

Device for changing the speed of a bicycle by chain derailment on the crankset

Improvements made to derailleurs for cycle cranksets

Improvements to bicycles

CYCLE SPEED CHANGE DEVICE

Advanced speed change for cycles

New gear change device for bicycles

Speed multiplier

FRONT DERAILLEUR FOR A BICYCLE

DEVICE FOR FIXING THE TWO WINGS OF A CRANKSET FOR A BICYCLE

DISPOSITIF DE FIXATION D'UNE PREMIERE PIECE A UNE SECONDE PIECE, NOTAMMENT DES DEUX AILES D'UNE CHAPE DE DERAILLEUR DE PEDALIER POUR BICYCLETTE, COMPRENANT UNE ENTRETOISE 14 INTERPOSEE ENTRE LESDITES PREMIERE 4 ET SECONDE 5 PIECES ET UN ORGANE DE FIXATION ASSOCIE A LADITE ENTRETOISE, CARACTERISE EN CE QUE LEDIT ORGANE DE FIXATION EST CONSTITUE PAR UNE FICHE 7 ENGAGEE DANS DES TROUS 9, 10 MENAGES DANS LESDITES PREMIERE ET SECONDE PIECES ET POURVUE A L'UNE DE SES EXTREMITES D'UNE TETE 13 DESTINEE A COOPERER AVEC LA FACE EXTERIEURE DE LA PREMIERE PIECE 4 ET A SON AUTRE EXTREMITE D'UNE SAILLIE LATERALE 8 DESTINEE A VENIR EN PRISE AVEC LA FACE EXTERIEURE DE LA SECONDE PIECE 5, LES TROUS MENAGES DANS LES PREMIERE ET SECONDE PIECES COMPORTANT DES PASSAGES 11 POUR LADITE SAILLIE LATERALE LORS DU MONTAGE DE LA FICHE. DEVICE FOR FIXING A FIRST PIECE TO A SECOND PIECE, IN PARTICULAR THE TWO WINGS OF A BICYCLE CRANKSET DERAILLEUR Yoke, INCLUDING A SPACER 14 INTERPOSED BETWEEN THE SAID FIRST 4 AND SECOND 5 PIECES AND A FIXING DEVICE ASSOCIATED WITH THE ASSOCIATED WITH THE BICYCLE , CHARACTERIZED IN THAT IT'S FIXING BODY IS CONSTITUTED BY A PLUG 7 ENGAGED IN HOLES 9, 10 HOUSEHOLDS IN THE SAID FIRST AND SECOND ROOMS AND PROVIDED AT ONE OF ITS ENDS WITH A HEAD 13 INTENDED TO COOPERATE WITH THE EXTERNAL FACE OF THE FIRST ROOM 4 AND AT ITS OTHER END OF A LATERAL PROJECT 8 INTENDED TO COME IN ENGAGEMENT WITH THE EXTERNAL FACE OF THE SECOND ROOM 5, THE HOLES HOLES IN THE FIRST AND SECOND ROOMS INCLUDING PASSAGES 11 FOR THE SAID SIDE PROJECTION DURING THE MOUNTING OF THE PLUG.

FRONT DERAILLEUR CHAIN GUIDE FOR BICYCLES

DIRECT AND REVERSE PEDALING FOR A BICYCLE WITH AUTOMATIC SPEED CHANGE REPLACING THE DERAILLEUR AND CLUTCH OPERATING AT VERY LOW SPEED

Système de pédalage direct et inverse pour une bicyclette avec changement de vitesse automatique remplaçant le dérailleur et embrayage fonctionnant à très basse vitesse utilisant une roue à plots (16), le tout enfermé dans un boîtier carter rempli d'huile. Les deux roues(11) et (13) elles même entraînées par les bielles (9) et (10) font un mouvement alternatif de va et vient inférieur à un demi tour quelque soit le sens de rotation de la roue motrice (1) et entraînent la roue (12) puis la roue entraînée (2) par l'intermédiaire de l'embrayage basse vitesse entre les roues (15) et (16). Ce système peut être étendu dans tout montage mécanique le nécessitant et ne se limite pas à la bicyclette. Direct and reverse pedaling system for a bicycle with an automatic gearshift replacing the derailleur and clutch operating at a very low speed using a stud wheel (16), all enclosed in a housing housing filled with oil. The two wheels (11) and (13) themselves driven by the rods (9) and (10) reciprocate back and forth less than half a turn regardless of the direction of rotation of the driving wheel (1) and driving the wheel (12) and the driven wheel (2) via the low speed clutch between the wheels (15) and (16). This system can be extended in any mechanical assembly that requires it and is not limited to the bicycle.

METAL TUNNEL GUIDE-CABLE DEVICE WITH ANTI-FRICTION TRIM, INTENDED TO BE WELDED OR BRASED ON CYCLE FRAMES AND SIMILAR VEHICLES

L'objet de l'invention se rattache au secteur technique des accessoires pour cycles, cyclomoteurs et véhicules similaires. Le dispositif est caractérisé en ce que la courbure du tunnel guide-câble 1 reçoit intérieurement, au moins sur toute la longueur d'appui du câble, une garniture 2 amovible en matière à faible coefficient de friction; ladite garniture 2 présentant longitudinalement sur sa face inférieure et sur toute sa longueur au moins une gorge 2' pour le logement d'un câble et etant rapportée après la soudure ou le brasage du tunnel 1. Ledit tunnel 1 ainsi que ladite garniture 2 présentent des moyens complémentaires afin de maintenir et de positionner fermement et d'une manière amovible la garniture 2 dans le tunnel 1. Le dispositif est notamment utilisé pour le guidage et le renvoi des câbles de commande de changement de vitesse The object of the invention relates to the technical sector of accessories for cycles, mopeds and similar vehicles. The device is characterized in that the curvature of the cable guide tunnel 1 internally receives, at least over the entire bearing length of the cable, a removable lining 2 made of a material with a low coefficient of friction; said lining 2 having longitudinally on its underside and over its entire length at least one groove 2 ′ for accommodating a cable and being attached after welding or brazing of the tunnel 1. Said tunnel 1 as well as said lining 2 have additional means in order to maintain and position firmly and in a removable manner the lining 2 in the tunnel 1. The device is used in particular for guiding and returning the gearshift control cables

Derailleur for cycle or other similar vehicle

DEVICE FOR CHANGING THE POSITION OF THE DERAILLEUR BEFORE A BICYCLE

Ce dispositif est du type de ceux qui comportent une tête d'articulation fixe, solidaire du cadre, et une tête d'articulation mobile 32, portant le dérailleur proprement dit 24, qui fait passer la chaîne d'un plateau de pédalier sur l'autre, les deux têtes d'articulation 30, 32 étant reliées l'une à l'autre par un système articulé 36 déformable dans un plan parallèle à l'axe du pédalier. Il est caractérisé en ce que le système articulé 36 comprend un levier 38 et un élément de guidage 44 articulés l'un sur l'autre en leur milieu 50 et articulés tous deux sur les têtes par leurs extrémités 40, 42, 46, 48, les axes des cinq articulations étant perpendiculaires au plan dans lequel se déplace le dérailleur 24 et deux 40, 42 d'entre elles étant à coulisse. This device is of the type of those which comprise a fixed articulation head, integral with the frame, and a movable articulation head 32, carrying the actual derailleur 24, which passes the chain from a chainring to the chainring. another, the two articulation heads 30, 32 being connected to one another by an articulated system 36 which can be deformed in a plane parallel to the axis of the crankset. It is characterized in that the articulated system 36 comprises a lever 38 and a guide element 44 articulated one on the other in their middle 50 and both articulated on the heads by their ends 40, 42, 46, 48, the axes of the five articulations being perpendicular to the plane in which moves the derailleur 24 and two 40, 42 of them being sliding.

Improvements to chain derailleurs

Derailleur Mounting Assembly for a Bicycle

A derailleur mounting assembly for a bicycle having a rear wheel suspension includes a chain stay having a first end connected to a bicycle crank in a manner so as to pivot about the crank axis, and a derailleur mounted on the chain stay. The chain stay is operable to pivot about the crank axis when the rear wheel suspension allows a rear wheel to move. This allows the derailleur to be maintained in a stationary position with respect to a bike chain extended between the bicycle crank and a sprocket attached to a rear wheel.

Gear shifting for carts