US 11,766,123 B2
Unfolding device of sofa
Yuanfeng Feng, Zhejiang (CN); Sheng Wang, Zhejiang (CN); Linlin Wu, Zhejiang (CN); and Zhiyu Wang, Zhejiang (CN)
Assigned to JASON FURNITURE (HANGZHOU) CO., LTD., Zhejiang (CN)
Filed by JASON FURNITURE (HANGZHOU) CO., LTD., Zhejiang (CN)
Filed on Nov. 18, 2022, as Appl. No. 17/989,757.
Prior Publication US 2023/0172356 A1, Jun. 8, 2023
Int. Cl. A47C 1/04 (2006.01); A47C 1/034 (2006.01); A47C 17/04 (2006.01)
CPC A47C 1/0342 (2013.01) [A47C 17/04 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An unfolding device of a sofa, comprising a base, wherein a side plate is provided above the base, and a connecting rod assembly is connected between the side plate and the base; the side plate is provided with a mounting assembly; a footrest assembly and a backrest connecting member are mounted on and rotatably connected with the side plate, the base is provided with a driving assembly configured for driving the footrest assembly to rotate and the side plate to move towards a front of the unfolding device; the side plate is configured to have a first end close to the backrest connecting member lower than a second end close to the footrest assembly during a process of the driving assembly driving the side plate to move towards the front of the unfolding device, and the mounting assembly is configured to have an included angle a relative to a horizontal plane, where 27°≤a≤50°, when the unfolding device is in a lying state;
the connecting rod assembly comprises a first curved arm and a second curved arm, and a set of linkage rods connected between the first curved arm and the second curved arm; the set of linkage rods comprise a linkage piece, a first linkage rod and a second linkage rod; a first end of the linkage piece is rotatably connected to an end of the first curved arm close to the backrest connecting member, and a second end of the linkage piece is rotatably connected to the side plate; two ends of the second linkage rod are rotatably connected to the side plate and an end of the second curved arm close to the footrest assembly, respectively, and two ends of the first linkage rod are rotatably connected to a middle of the linkage piece and a middle of the second linkage rod, respectively.