The assembled device

Technical Field

The invention relates to a method for mounting to a vehicle body of the motor the fuel tank cap to the opening direction of the passageway of the assembled device.

Background Art

In the past, as the assembled device, for example, there is Patent document 1. In this in the prior art, under a center of the spring in the shell sidebar department warms, and towards the cam portion to the rotor thrust augmentation.

The prior technical literature

Patent literature

Patent document 1: Japanese opens especially 2011 - 5945

Content of the invention

Subject to be solved by the invention

The invention considering the above facts, offering one can inhibit the closing the cap of the tank jitter and improve the operability of the assembled device.

The subject method is used to solve the

The invention of clause 1 scheme provides a passageway device, it has: is fixed relative to the cover with the fuel tank of the vehicle body side of the cylindrical shell; is slidably retained in the shell body, the shell body projecting from and the introduction of the rod above the fuel tank cap; located between the above-mentioned housing and the above-mentioned, in the shell body through the elastic deformation is compressed to from in the shell body and the protruding direction of the force of the last pole thrust augmentation mechanism; and is located between the above-mentioned housing and the above-mentioned, by overcoming the force of the boosting mechanism and to the upper pressed into the pole, the upper pole for locking the above-mentioned housing and reverse position of the locking mechanism, the thrust augmentation mechanism relative to the upper pole to the above-mentioned shell pressed in the initial period of the stroke of the force relative to the rate of increase of ratio in the above-mentioned initial stroke after stroke at the later stage of the rate of increase of the acting force of the small.

In the above-mentioned scheme, is located relative to the fuel tank cap is affixed to the vehicle body side of the cylindrical shell and is slidably retained in the casing and the shell from the inside of the fuel tank cap projecting into the introduction of reinforcing rod between the through elastic deformation in the hull is compressed from the housing and to the direction of the force of the stress in the bar. In addition, the force of the mechanism relative to the rod to the shell pressed in the initial stroke of the than the rate of increase of force with respect to the in the initial stroke after stroke at the later stage of the rate of increase of the acting force of the small. Therefore, in closing the cap, the gas cap with the passageway against the connection of the device, the fuel tank cap to push back the passageway of the device during the initial stage of the reaction force of the boosting mechanism is relatively small, then becomes large. As a result, in the closed the cap, inhibit the sudden reaction force boosting mechanism of the device is pressed back to the tank of the tank generated by the jitter, improve the operability.

The invention of clause 2 proposal is, in the invention of the article 1 in the scheme, the thrust augmentation mechanism also can have pitch different large pitch department and small pitch department of the spiral spring.

In the above-mentioned in the scheme, because the thrust augmentation mechanism has pitch different large pitch department and small pitch department of the spiral spring, therefore the thrust augmentation mechanism can use of a spiral spring so that the structure becomes simple.

The invention of clause 3 scheme is, in the invention of article 2 in the scheme, the above-mentioned small pitch portion also can be formed in the length direction of the above-mentioned helical spring the two ends.

In the above-mentioned in the scheme, is formed in the length direction of the spiral spring the two ends of the small pitch department with the shell and the rod of the joint. Therefore, the spiral spring is compressed, the length direction of the spiral of the spring relative to the length direction of the two ends of the difficult to be bent. As a result, the compressive deformation of the spiral spring as a whole stable.

The invention of clause 4 scheme is, in the invention of the section 2 or 3 in the scheme, the locking mechanism also can be the above-mentioned small-pitch part leaves the lifting of the compressed state of the metallic structure for locking the upper pole locking the above-mentioned shell and reverse position.

In the above-mentioned in the solution of the, lock mechanism so as to small-pitch portion provided for locking of the relieves the pole compressed state of the metallic structure of the rod is locked in the housing of the reverse position. Therefore, the rod is locked in the reverse position of the shell of the locked state of the locking of the screw the force of the spring becomes larger, can inhibit the locking state of the lever and the dithering of the fuel tank cap.

The invention of clause 5 scheme is, in the invention of paragraph 1 or paragraph 2 in the scheme, the locking mechanism is through the upper pole to press the cam working and locking and releases the locking of the switching cam type locking mechanism.

In the above scheme, the locking mechanism is a cam-type locking mechanism, through the pole of a press, the cam working and locking and releases the locking of the switching. Therefore, locking and releasing the locking between the switching is reliable.

The effect of this invention

The invention of clause 1 programme because adopting the above-mentioned structure, the invention can restrain the closing the cap of the tank jitter and improve the operability.

The invention of clause 2 scheme because the above-mentioned structure, it can be with the simple structure to inhibit closing the cap of the tank jitter and improve the operability.

The invention of clause 3 programme because adopting the above-mentioned structure, the compressive deformation of the spiral spring is stable.

The invention of clause 4 scheme because the above-mentioned structure, the invention can restrain the lower rod and the locking state of the jitter of the fuel tank cap.

The invention of clause 5 scheme because the above-mentioned structure, it is possible to reliably switch the locking and release the lock.

Description of drawings

Figure 1 is the cutaway view of that section of the present invention 1 embodiment of the assembled device.

Figure 2 is the side view of that section of the present invention 1 embodiment of the helical spring of the passageway.

Figure 3 is the diagram of that section of the present invention 1 embodiment of the helical spring of the accessories of the relationship between the stroke and the load table.

Figure 4 is the cutaway view of that section of the present invention 1 embodiment passageway of the device mounted on the vehicle body state.

Figure 5 is the decomposition three-dimensional view of that section of the present invention 1 embodiment passageway of the device mounted on the vehicle body state.

Figure 6 is the three-dimensional view of that section of the present invention 1 embodiment of the passageway of the rod and the rotor of the device assembled state.

Figure 7 is the three-dimensional view of that section of the present invention 1 embodiment of the passageway of the rod, the assembly of the rotor and the sleeve and the sleeve cut state.

Figure 8A is the diagram of the of the present invention for section 1 embodiment of locking device of sudden movements of the organization.

Figure 8B is the diagram of the of the present invention for section 1 embodiment of locking device of sudden movements of the organization.

Figure 9A is the diagram of the of the rod that is pressed state and Figure 8A to should be.

Figure 9B is the diagram of the of the rod that is pressed state and Figure 8B to should be.

Figure 10A is the diagram of the of the locking state of said locking mechanism and with the Figure 8A to should be.

Figure 10B is the diagram of the of the locking state of said locking mechanism and with the Figure 8B to should be.

Figure 11 is the side view of that section of the present invention 1 embodiment passageway of the shell of the device.

Figure 12 is the side cutaway view of that section of the present invention 1 embodiment passageway of the shell of the device.

Figure 13 is the side view of that section of the present invention 1 embodiment of the casting machine of the assembled device.

Figure 14 is the side view of said from the other viewed in the direction of the of the present invention 1 embodiment of the casting machine of the assembled device.

Figure 15 is the top view of that section of the present invention 1 embodiment of the casting machine of the assembled device.

Figure 16 is the cutaway view of along the Figure 15 of 16 - 16 splits exposes seams.

Figure 17 is the side view of that section of the present invention 1 embodiment of the passageway of the rod.

Figure 18 is the bottom view of that section of the present invention 1 embodiment of the passageway of the rod.

Figure 19 is the side view of that section of the present invention 1 embodiment of the device of the passageway of the rotor.

Figure 20 is the top view of that section of the present invention 1 embodiment of the device of the passageway of the rotor.

Figure 21 is the cutaway view of that section of the present invention 1 embodiment of the device of the passageway of the rotor.

Figure 22 is the side view of that section of the present invention 1 embodiment of the passageway of the sleeve.

Figure 23 is the cutaway view of that section of the present invention 1 embodiment of the passageway of the sleeve.

Figure 24 is the decomposition three-dimensional view of that section of the present invention 2 embodiment of the assembled device.

Mode of execution

(Article 1 embodiment)

Next, according to fig. 1 - fig. 23 of the present invention device of the passageway section 1 a description of the embodiment.

As shown in Figure 4, the embodiment of the assembled device 10 is arranged with the tank as 12 relative to the car body, for example the inner plate 14 (vehicle body), can be installed opening and closing for the inner plate 14 of the fuel tank cap 12 the assembled device 10 to the opening direction (Figure 4 in the direction of arrow-marked A) introduced.

As shown in Figure 1, the assembled device 10 has a housing 16, casting machine 18, rod 20, the rotor 22, the sleeve 24, as a boosting mechanism spiral spring 26 (a reinforcing mechanism), protective cover 28 and the last-mentioned locking mechanism. In addition, the assembled device 10 is not necessarily limited in the above-mentioned part of the part.

(Shell)

As shown in Figure 5, shell 16 is formed as a cylinder. In addition, the inner plate 14 is formed on the table inside through the square mounting hole 32, the housing 16 is fixed to the mounting hole 32.

As shown in Figure 11 and Figure 12 shown, housing 16 is formed as a cylindrical opening on the top, forming a bottom surface. In addition, shell 16 is set to the outer diameter of the inner plate 14 of the mounting hole 32 of the inner diameter of the following. In the housing 16 of the end of the opening side is formed on the outwardly projecting along the radial direction of the flange section 34, the flange portions 34 of the upside of the installed protective cover 28 of annular mounting recess 36. In addition, the flange portions 34 of the lower side, from the housing 16 to the periphery of the formed with a plurality of radial, such as two can be elastic deformation of the projecting elastic claw 38, these elastic claw 38 maintain the inner plate 14 spaced from the plate thickness of the flange part 34 of the lower surface of the leaves.

As shown in Figure 4, the shell 16 and in contact with the embedded into the mounting hole 32 after, the elastic claw 38 temporarily retracted, subsequently, in the inner plate 14 on the back side of the elastically restores, through with the flange part 34 is clamped between the lower surface of the inner plate 14, the housing 16 is fixed in the mounting hole 32.

(Casting machine)

As shown in Figure 1, casting machine 18 is mounted in the shell 16 on the opening of the surface.

As shown in Figure 13 and Figure 14 shown, casting machine 18 than to the shell 16 on the opening of a large circle on the surface of the lid portion of the 40 and from Ge Bu 40 of the fine point of the lower surface of the cylindrical extending portion 42.

As shown in Figure 15 and Figure 16 shown, in casting machine 18 of the cover 40 is formed on the upper and lower through the round through hole 44, through hole 44 interpolation passes has the pole 20.

As shown in Figure 1, casting machine 18 of the cylindrical part 42 is set for the periphery of the shell A16 the inner diameter of the of the following, and inserted into the housing A16 in.

As shown in Figure 13 - Figure 16 is shown, in the casting machine 18 of the cylindrical part 42 of the periphery of the with Ge Bu 40 locations adjacent to the radial ground cover and formed with a plurality of, for example two can be elastic deformation of the projecting clip hook 46.

As shown in Figure 11 and Figure 12 shown, in the housing 16 of the mounting recess 36 is formed near the through hole of the outside 48, casting machine 18 of the clip hook 46 is inserted into the shell 16 of the clip hole 48.

Therefore, the casting machine 18 of the cylindrical part 42 and in contact with the embedded shell 16 after the opening of the surface, of the clip hook 46 temporarily retracted, subsequently, through the elastic embedding into the clip hole 48, the casting machine 18 is affixed to the shell 16.

As shown in Figure 16, in casting machine 18 of the cylindrical part 42 of the concave is formed on the inner peripheral surface of the sliding groove 50 (locking mechanism). The sliding groove 50 the rod 20 slidably and non-rotatably maintained. In addition, the sliding groove 50 is formed with a plurality, such as three, their upper ends closed, the lower end of the opening. In the sliding groove 50 in the underside of the concave is formed is fixed to the cylindrical portion 42 on the inner peripheral surface of the lock groove 52 (locking mechanism), the lock groove 52 of the locked rotor 22 so that it is not rotatable. In addition, the lock groove 52 is formed on the sliding groove of the adjacent 50 within an interval, along the cylindrical part 42 of the circumferential direction of the inner peripheral surface of the is saw-toothed.

As shown in Figure 8A - Figure 10B shown, locking groove 52 with: to a sliding groove 50 as a reference, from the sliding groove 50 towards the rotor 22 in the direction of rotation (Figure 8A - Figure 10B in the direction of the arrow mark B) in front of, and towards the top of the upwardly inclined 1st inclined face 52A; 1st inclined face located 52A inclined upper end portion, namely the rotor 22 in the direction of rotation of the front, is embedded with the last-mentioned rotor 22 engage the projection 56 (locking mechanism) of the locking part 52B; from the locking part 52B erected towards the lower part of the vertical parts 52C; and from a vertical 52C lower end part of the inclined upwards towards the top, and with the tilt the upper end position of the rotor 22 in front of the direction of rotation of the other one of the sliding groove 50 relative to the inclined face of the 2nd 52D.

In addition, 1st oblique face 54 of the lower end of the inclined part, namely the rotor 22 at the rear of the direction of rotation of the with a sliding groove 50 relative. In addition, 1st inclined face 52A and 2nd inclined face 52D the inclination angle between the same.

(Bar)

As shown in Figure 1, the rod 20 is slidably retained in the housing 16 in, from the housing 16 and the stress in the gas cap 12 introduced.

As shown in Figure 17 and Figure 18 shown, rod 20 is formed into a cylindrical, it possesses: is located along the axial direction of the middle part and a radially and outwardly projecting cam portion 64 (locking mechanism); located in the cam portion 64 of the upper side, from the housing 16 and the stress in the gas cap 12 on the introduction side of the part 66; and located in the cam portion 64 the underside of the, inject the helical spring 26 and the lower side of the part 68.

In the cam portion 64 is formed with the under surface of the latter rotor A22 of the movable-side cam surface 70 to engage the fixed side cam 72. The fixed side cam 72 along the cam portion 64 of the lower surface of the formed continuously in the circumferential direction, and is formed as an obtuse angle wave-toothed. In addition, in the cam portion 64 of the radial ground the periphery formed with a plurality of, such as three of the projecting sliding protrusion 74 (locking mechanism).

Rod 20 sliding protrusions 74 and is embedded in a casting machine 18 sliding groove 50, and through the groove in the 50 the lifting, the rod 20 is slidably and non-rotatably held to the casting machine 18 in.

As shown in Figure 1 and Figure 17 shown, the rod 20 on the part of the side 66 of the mounting formed on the upper end of the protective cover 28 of the ring of the annular groove 76. In addition, the rod 20 and the lower side of the part 68 is formed with a lower end portion of the last-mentioned sleeve 24 of the sideboard 78 embedded in the manner of the tapered middle detail 80.

As shown in Figure 1, the rod 20 of the detail in the middle of the 80 is set higher than the height of the sleeve 24 of the reduced-diameter portion 78 of the thickness of the upper and lower direction more high. Therefore, in the sideboard 78 embedded intermediate detail 80 under the state, the detail in the middle of the 80 produced on the height direction of the clearance. Therefore, the sleeve 24 of the sideboard 78 only in the rod 20 of the detail in the middle of the 80 can be mounted on the clearance part of the lifting.

In addition, clearance with the amount in the latter of the rotor 22 of the movable-side cam portion 82 and the cam portion 64 of the fixed side cam 72 the occlusion of the section 1 and from the height position of the fixed side cam 72 is separated from the section 2 between the height position of the lifting rotor 22 corresponding to the lifting amount of the set.

(Sleeve)

As shown in Figure 22 and Figure 23 shown, sleeve 24 with sleeve main body 88, the lug 84, reduced-diameter portion 78 and notch 92.

As shown in Figure 1 and Figure 5 shown, sleeve 24 inserts passes Yu Gan 20 lower sidebars part 68, the rotor 22 and the coil spring 26 between, and locking of the locking mechanism in the position of the limiting bar 20 along the sliding direction of the mobile.

As shown in Figure 7, sleeve 24 of the main body of the sleeve 88 is formed as a cylinder, a center part of the lower side 68. In addition, sleeve 24 and a projecting portion 84 is located at the rotor 22 is connected against the sleeve main body 88 of the upper end portion, a radially outwardly projecting.

As shown in Figure 23, sleeve 24 of the reduced-diameter portion 78 is located at the opposite side of the sleeve the upper end of the main body part 88 of the lower end part, the annular projecting radially inward. The incision 92 the sleeve main body 88 of the lower end portion into a plurality of, such as two part, the incision 92 of the sleeve along the body 88 in the diameter direction to form a pair of, from the sleeve main body is formed to have a 88 towards the underside of the above until the end of the way. In addition, incision A92 although in order to form a pair of for example, but can also be formed of three or more.

In addition, the sleeve 24 in the bar 20 shortened locking position-limiting the rod 20 along the sliding direction of the mobile. Namely, the rod 20 of the fixed side cam 72 and the latter the rotor 22 of the movable-side cam portion 82 engaging state, concave-convex 20 in the fixed side cam 72 and a movable side cam portion 82 in the direction far away, i.e. the upper and lower direction on the optical disk.

(Spiral spring)

As shown in Figure 1, the helical spring 26 is located in the shell 16 and rod 20 between, in the rotor 22 and the sleeve 24 inserts passes Yu Gan 20 under the part of the side 68 of the state, in the sleeve 24 of the lug 84 and the housing 16 is compressed between the bottom of, and towards the from the casing 16 on the end of the stress in the direction of the 20 force. In addition, the helical spring 26 in the housing 16 in the shrinking, and towards the rod 20 of the cam portion 64 to the rotor 22 thrust augmentation.

As shown in Figure 2, the helical spring 26 is a pitch different large pitch department 26A and small pitch department 26B, 26C unequal pitch of the spiral spring. In addition, the helical spring 26 small pitch department 26B and small pitch department 26C forming spiral spring 26 in the direction of the length of the two ends, the helical spring 26 in the direction of the length of the middle part is large pitch department 26A.

In addition, the helical spring 26 of length L, large pitch department 26A of length L1, small pitch department 26B length L2 and small pitch department 26C length L3 and the length of the is various relations, one example, L=L1 + L2 + L3, L1 _aogtao_ L2=L3.

Therefore, the helical spring 26 of the stroke (the following record for S) and the load (the following record for N) the relationship between the as shown in Figure 3.

As shown in Figure 3, relative to the helical spring 26 has a free length of (S=S0) load (N=N0), in the assembled device 10 installed on the vehicle body, the gas cap 12 a state of opening the, S=S1, N=1.

In addition, in the closed fuel tank cap 12 under the condition of, the gas cap 12 is abutted against the sudden device 10 when the, relative to the rod 20 to the housing 16 pressed in the initial stroke (S2 - S1) increase in load of the (N2 - N1) the proportion of (N2 - N1)/(S2 - S1) than with respect to the in the initial stroke (S2 - S1) after post-stroke (S6 - S2) increase in load of the (N6 - N2) the proportion of (N6 - N2)/(S6 - S2) is smaller.

Therefore, by the spiral spring 26 acting force generated by the increase in the proportion than the early relative to the stroke (S2 - S1) after post-stroke (S6 - S2) the rate of increase of the acting force is smaller.

In addition, in fig. 3 in, S3 for off gas cap 12 of the state of the stroke, N3 indicates that the state of the load. In addition, S4 said passageway device 10 has locking stroke, N4 indicating the state of the load. In addition, S5 said discharge passageway device 10 locking of the stroke, N5 representing the state of the load. In addition, S6 that the assembled device 10 maximum over-travel, N6 representing the state of the load. Further, Figure 3 single-point line in the chart the expressed by the pitch of the helical spring and of the relationship between the stroke and the load.

In addition, the spiral spring 2 is 6 compression, following the big pitch department 26A compressed small pitch department 26B, 26C to leaves leeway the pole 20 for releasing the locking of the metallic structure (S5 - S4) is compressed state, namely a spiral spring 26 small pitch department 26B, 26C substantially closed state, the rod through the locking mechanism 20 is locked in the housing 16 and reverse position.

(Locking mechanism)

As shown in Figure 6, locking mechanism as having the rotor 22 of the rotary cam, the housing 16 and rod 20 between, overcome the helical spring 26 to the acting force of the rod 20 is locked in the housing 16 and reverse position. In addition, the rotor 22 can be rotated, and can be axially slidably supported on a rod 20 and the lower side of the part 68, with the cam portion 64 of the fixed side cam 72 occlusion, and the rod 20 of the clip from sliding, for applying a force in the direction of the movable-side cam portion 82.

As shown in Figure 19 - Figure 21 shown, the rotor 22 to form a shock absorption function. In addition, as shown in Figure 20 and Figure 21 shown, the rotor 22 has: in the center of the penetrated through the up and down, a topping 20 lower sidebars part 68 are inserted into the center hole 86; above and formed, with the rod 20 of the cam portion 64 of the fixed side cam 72 are meshed with the gear, and the rod 20 from sliding clip, for applying a force in the direction of the movable-side cam portion 82. The movable side cam portion 82 formed with the rod 20 of the cam portion 64 of the fixed side cam 72 the shape of the inventive, along the rotor 22 on the continuous in the circumferential direction of the obtuse wave-toothed form. In addition, in the movable-side cam portion 82 of the outer periphery, the radial ground is formed with a plurality, such as three outstanding snap-latch projection 56.

As shown in Figure 10A - shown in Figure B, the rotor 22 of the snap-latch projection 56 is formed on the upper surface of the inclined plane trapezoidal-shaped, and is embedded in the casting machine 18 locking groove 52 of the locking part 52B. In addition, the rotor 22 of the snap-latch projection 56 of the trapezoidal-shaped inclined surface and the locking groove A52 of the 1st inclined face 52A and 2nd inclined face 52D consistent with the angle of inclination.

As shown in Figure 8A - shown in Figure B, the rotor 22 of the snap-latch projection 56 of the width of the left and right direction is set to casting machine 18 sliding groove 50 of the width of the left and right of the following, the sliding groove 50 can slide.

Therefore, in this embodiment, in addition to the rotor 22 of the snap-latch projection 56, casting machine 18 locking groove 52 outside, rod 20 of the cam portion 64 and the sliding projection 74, casting machine 18 sliding groove 50 also play the role of a locking mechanism of the constituent elements of a role.

(Cover)

As shown in Figure 1, protective cover 28 is can cover from the housing 16 on the projecting part of the side 66 of the telescopic part, its is mounted in the shell 16. Protective cover 28 is formed below the hollow snake abdomen shape opening, the upper end of the closed bag. The protective cover 28 of the upper end portion on the inner circumferential surface, is formed with a radially inwardly annularly projecting annular projection 94, the annular projection 94 inserts the pole 20 of the annular groove 76. In addition, the protective cover 28 below an opening of the inner peripheral surface of the, is formed with a radially inwardly annularly projecting annular protrusion 96, the annular projection 96 embedded in the shell 16 of the mounting recess 36.

(· Effect role)

Next, this embodiment of the assembled device 10 of a description of the effect.

As shown in Figure 4, dryeaten device 10 under the assembly state, through the housing 16 together with the embedding the inner plate 14 of the mounting hole 32 affixed to the inner plate 14. In addition, as shown in Figure 10A - shown in Figure B, the fuel tank cap 12 under the closed state, the assembled device 10 is locked to the rod 20 is shortened in the locking state.

Next, as shown in Figure 9A - shown in Figure B, the closed state of the fuel tank cap 12 is pressed, the assembled device 10 of the rod 20 is pressed into the shell 16 in, unlocked from the locking state. As shown in Figure 8A - B shown in plan, its result is through the helical spring 26 compressed restoring, rod 20 from the housing 16 in the course of, the fuel tank cap 12 away. Therefore, can be easily opened by hand is according to opening of the fuel tank cap 12.

More specifically, as shown in Figure 10A - shown in Figure B, the rod 20 to shorten the locked state of the locking, the rotor 22 of the snap-latch projection 56 with the casting machine 18 locking groove 52 engages, and inserted into the locking part 52B in. In this state, if the rod 20 is pressed into the shell 16 in, the rotor 22 is wafers 20 of the cam portion 64 is pressed by the decline. Therefore, as shown in Figure 9A - shown in Figure B, the rotor 22 of the snap-latch projection 56 from the casting machine 18 of the locking part 52B separated from the clip. At this moment, the rod 20 of the cam portion 64 of the fixed side cam 72 and the rotor 22 of the movable-side cam portion 82 from the occlusion between the clip, the rotor 22 to rotate in the direction of the arrow mark B. Then, the relaxation of the rod 20 is pressed into the called number, the rotor 22 through the helical spring 26 compression resilience is sudden. At this time, the rotor 22 of the snap-latch projection 56 with the casting machine 18 of section 2 of the inclined plane part 52D is connected against the. Therefore, snap-latch projection 56 with the inclined face on the side of the 2nd 52D sliding contact one side of the rise, as shown in Figure 8A - shown in Figure B, the inclined face from the 2nd 52D on the bevel of the end part is inserted into the sliding slot 50.

As shown in Figure 8A - shown in Figure B, snap-latch projection 56 is inserted into the sliding slot 50 after, snap-latch projection 56 along the sliding groove 50 to rise. Therefore, through the helical spring 26 compressed restoring, rod 20 of the cam portion 64 through the rotor 22 is sudden, rod 20 from the housing 16 by protruding extension.

On the other hand, hand close-open gas cap 12 after, the gas cap 12 with the assembled device 10 abutment, stretched rod 20 g garment spiral spring 26 acting force, and toward the casing 16 is pressed into the, rotor 22 engage the projection 56 along the slide 50 drops.

At this time, in this embodiment, as shown in Figure 2, the helical spring 26 has a pitch different large pitch department 26A and small pitch department 26B, 26C.

Therefore, as shown in Figure 3, relative to the rod 20 to the housing 16 pressed in the initial stroke (S2 - S1) increase in load of the (N2 - N1) the proportion of (N2 - N1)/(S2 - S1) than with respect to the in the initial stroke (S2 - S1) after post-stroke (S6 - S2) increase in load of the (N6 - N2) the proportion of (N6 - N2)/(S6 - S2) is smaller. As a result, by the spiral spring 26 acting force generated by the increase in the proportion of the variable than relative to the in the initial stroke (S2 - S1) of (S6 - S2) after the increase of the acting force of the small.

Therefore, when the fuel tank cap 12 with the assembled device 10 supports connecting, the fuel tank cap 12 pressed back of the spiral spring 26 of relatively small reaction force in the initial stages, subsequently becomes larger. Therefore, when the fuel tank cap and accessories can inhibit the device 10 when in contact, through the helical spring 26 reacting force of, the gas cap 12 is caused by the back of the cover 12 of the jitter, and improve the operability. As a result, can realize high class with the gas cap 12 of the closing operation.

Next, rod 20 g garment spiral spring 26 acting force, and toward the shell 16 is further pressed, the rotor 22 of the snap-latch projection 56 along the slide 50 drop, snap-latch projection 56 from the sliding groove 50 of the lower end of the opening after being pulled out, the rotor 22 can be rotated. Therefore, through the fixed side cam 72 and a movable side cam portion 82 of the clip away from the occlusion between the, rotor 22 along the Figure 9B B rotate in the direction of the arrow mark, and from the sliding groove 50 towards the lower side of the groove 52 of the 1st inclined face 52 of the mobile.

Next, the relaxation of the rod 20 is pressed into the called number, the rotor 22 through the helical spring 26 compression resilience is sudden. At this time, snap-latch projection 56 with the 1st inclined face 52A abutment. Therefore, snap-latch projection 56 on the side of the inclined face with the 1st 52A sliding contact one side of the rise, as shown in Figure 10A - shown in Figure B, embedded in the locking part 52B, once again return to the locked state.

In this way, in this embodiment, the locking mechanism is a rotary cam type locking mechanism, through the pole 20 of the press-in, the work of the rotary type cam and locking and unlocking switching. Therefore, locking and releasing the locking between the switching is reliable.

In addition, in this embodiment, as with the use large pitch department 26A and small pitch department 26B, 26C of a spiral spring 26 as a reinforcing mechanism, the structure becomes simple. As a result, the cost increase can be suppressed.

In addition, in this embodiment, is formed on the spiral spring 26 in the direction of the length of the two ends of the small pitch department 26B, 26C with shell 16 and the rod 20 of the abutment. Therefore, when the coil spring 26 is compressed, the coil spring 26 in the direction of the length of the two ends of the difficult to be bent relative to the length direction. As a result, the helical spring 26 the overall compression deformation of the stability.

In addition, in this embodiment, the helical spring 26 is compressed, following the big pitch department 26A compressed small pitch department 26B, 26C to leaves leeway the pole 20 for releasing the locking of the metallic structure (S5 - S4) compressed state, namely a spiral spring 26 small pitch department 26B, 26C substantially closed state, the rod locking mechanism 20 is locked in the housing 16 and reverse position. Therefore, the rod 20 is locked in the housing 16 of the locked state of the backward position of the spiral spring 26 acting force becomes larger, can inhibit the locking state of the lever 20 and the gas cap 12 of the jitter.

(Other embodiments)

Although the above specific embodiment of the present invention carried out detailed explanation, but this invention is not limited to the above embodiment, the technical personnel in this field for the scope of the present invention various other embodiments are clearly possible. For example privately 24 of the expressed by 2 embodiment of device passageway 90 the same, through the rod 102 is pressed into the housing 100, the control spring 108 end of 108A along the heart shape of the control cam 106 mobile, the control cam 106 recess 106A locking control spring 108 end of 108A become locked state, once again through the pole 102 is pressed into the housing 100, the control spring 108 end of 108A from the control cam 106 recess 106A far away from the locking state is relieved, the so-called the use of the heart-shaped cam mechanism which device (German Patent 19650594A1 of such as recorded by the passageway of the device), as the rod 102 from the housing 100 to the projecting direction in the force of the boosting mechanism also can be adopted to use the article 1 embodiment of the spiral spring 26 of the structure.

In addition, in the above embodiment, although the introduction of spiral spring 26 small pitch department 26B, 26C forming spiral spring 26 in the direction of the length of the two ends, the helical spring 26 in the direction of the length of the middle part forming a large pitch department 26A structure, but the spiral spring 26 as long as the forming pitch of different small pitch department and large pitch part can be, small and large pitch departmentpitch department or position does not limit the number of the above-mentioned each embodiment.

In addition, also can partially change helical spring 26 or the thickness of the material, for example of the helical spring 26 small pitch department 26B, 26C than the thickness of the large pitch department 26A of coarse and fine coarse, so that the form a spiral spring 26 small pitch department 26B, 26C of the material of the elastic force than a large pitch department 26A of the material of the elastic force, in order to make the rod to the shell pressed in the initial period of the stroke of the force relative to the rate of increase of the initial stroke of the following than the latter part of the stroke of the rate of increase of the acting force of the small.

In addition, in the above embodiment, although the use of the helical spring 26 as a reinforcing mechanism, but can also be replace the spiral spring, such as the use of connecting the elastic force of the different shape of the rubber of the other energizing mechanism, in order to make the rod to the shell pressed in the initial period of the stroke of the force relative to the rate of increase of the initial stroke of the following than the latter part of the stroke of the rate of increase of the acting force of the small.