25-06-2015 дата публикации
Номер: US20150173511A1
Принадлежит:
A mechanical stretching device of a convertible sofa includes left components, right components, a switch component, and a locking spring. The left components are fixedly connected to the right components by fixing components. The switch component is mounted on the left components or on the right components. The left components and the right components respectively include a foot plate, a first foot lever, a second foot lever, a third foot lever, a fourth foot lever, a fifth foot lever, a side plate, a rotating shaft transmission member, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a back member, a calf plate, a first support member, a second support member, a linkage member, a protective member, a seahorse member, and a bottom foot. 1151142332294162012212625821310181119178937816581618539334922359125691955918571191810481820541921491926461213591220956211351131017445232341314022233322254222264323232213911531214381415302544549367112724367374187537615606177962106312641465226623672571606572677361746275667664776324925925. A mechanical stretching device of a convertible sofa , comprising left components and right components that are symmetrically disposed and fixedly connected to each other , wherein: the left components or the right components comprise a foot plate () , a first foot lever () , a second foot lever () , a third foot lever () , a fourth foot lever () , a fifth foot lever () , a side plate () , a rotating shaft transmission member () , a first connecting rod () , a second connecting rod () , a third connecting rod () , a fourth connecting rod () , a fifth connecting rod () , a sixth connecting rod () , a back member () , a calf plate () , a first support member () , a second support member () , a linkage member () , a protective member () , a seahorse member () , and a bottom foot () that are linked to each other; one side of a first end of the back member () ...
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