| 摘要 |
The invention relates to a mechanical stretching device for a multifunctional convertible sofa, which is mainly applied to a convertible sofa, and is a furniture component. The mechanical stretching device includes a first foot lever, a second foot lever, a third foot lever, a fourth foot lever, a side plate, 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 first support member, a second support member, a linkage member, a seahorse member, a rotating shaft transmission member, a spring, and a bottom connecting rod. A first limiting surface and a second limiting surface are disposed on the second foot lever, a third limiting surface is disposed on the fourth foot lever, a fourth limiting surface and a fifth limiting surface are disposed on the side plate, a sixth limiting surface and a seventh limiting surface are disposed on the second connecting rod, an eighth limiting surface is disposed on the sixth connecting rod, a ninth limiting surface is disposed on the first support member, and a tenth limiting surface is disposed on the linkage member. The structure is reasonably designed, the length increased by unfolding is substantially the same as the length reduced by folding, a back is loose by about 3 mm, and a product subsides by about 2 mm. |
