US 12,144,432 B1
Armrest mechanism of foldable sofa
Feng Chen, Huzhou (CN)
Assigned to ANJI QIANYUAN FURNITURE CO., LTD., Huzhou (CN)
Filed by ANJI QIANYUAN FURNITURE CO., LTD., Huzhou (CN)
Filed on Aug. 8, 2024, as Appl. No. 18/798,066.
Int. Cl. A47C 17/04 (2006.01); A47C 4/04 (2006.01); A47C 4/52 (2006.01); A47C 7/54 (2006.01); A47C 17/86 (2006.01); A47C 19/12 (2006.01)
CPC A47C 7/543 (2013.01) [A47C 4/045 (2013.01); A47C 4/52 (2013.01); A47C 7/541 (2018.08); A47C 17/04 (2013.01); A47C 17/86 (2013.01); A47C 19/124 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An armrest mechanism of a foldable sofa, comprising:
an outer support plate (100),
an inner bracing plate (300); and
a driving rod (200), wherein the outer support plate (100) and the inner bracing plate (300) are respectively arranged at two sides of the driving rod (200); a plurality of groups of crank rod assemblies (400) are provided on the driving rod (200), and the driving rod (200) is individually hinged with the outer support plate (100) and the inner bracing plate (300) through the plurality of groups of crank rod assemblies (400); and
wherein each of the plurality of groups of crank rod assemblies (400) comprises a first rod (410) and a second rod (420); an end of the first rod (410) is hinged with the inner bracing plate (300), and an end of the first rod (410) facing away from the inner bracing plate (300) is hinged with the driving rod (200); an end of the second rod (420) is hinged with the outer support plate (100), and an end of the second rod (420) facing away from the outer support plate (100) is hinged with the driving rod (200); and a gear structure (430) is arranged between the first rod (410) and the second rod (420) for meshing connection.