US 12,446,694 B2
Electric seat mechanical extension device
Yushu Zhao, Huzhou (CN); Wencai Li, Huzhou (CN); and Kai Jin, Huzhou (CN)
Assigned to Emomo Technology (Zhejiang) Co., Ltd., Huzhou (CN)
Filed by Emomo Technology (Zhejiang) Co., Ltd., Huzhou (CN)
Filed on Dec. 12, 2023, as Appl. No. 18/537,764.
Claims priority of application No. 202322314920.8 (CN), filed on Aug. 28, 2023.
Prior Publication US 2025/0072612 A1, Mar. 6, 2025
Int. Cl. A47C 7/14 (2006.01); A47C 1/024 (2006.01); A47C 1/0355 (2013.01); A47C 7/28 (2006.01)
CPC A47C 1/0355 (2013.01) 6 Claims
OG exemplary drawing
 
1. An electric seat mechanical extension device, comprising two bilaterally symmetrical mechanical extending units, a front driving member and a back driving member, wherein the front driving member and the back driving member are configured for connecting the two bilaterally symmetrical mechanical extending units, a motor is articulated with the front driving member and the back driving member, the front driving member is mounted on leg assemblies, the back driving member is mounted on a seat panel, each of the two bilaterally symmetrical mechanical extending units comprises a leg assembly and a backrest-seat assembly, the backrest-seat assembly comprises the seat panel, a linkage, a front connecting piece, a back connecting piece, a mounting member, a support wheel control member, a backrest adjusting member, a backrest control member and a backrest member, the back connecting piece is fixedly mounted on the seat panel, the backrest member and a first end of the front connecting piece are rotatably mounted on the seat panel, a second end of the front connecting piece is articulated with the mounting member, the mounting member is mounted on a base through a mounting member fixing pin assembly, a rear portion of the mounting member is articulated with the support wheel control member, the mounting member is articulated with the backrest adjusting member, the backrest adjusting member is articulated with the back connecting piece and articulated with a first end of the backrest control member, the backrest adjusting member is articulated with the linkage, the linkage is articulated with the corresponding leg assembly, a middle of the backrest control member is articulated with the backrest member, a backrest control member positioning pin is arranged at a second end of the backrest control member, a support wheel control member positioning slot is formed in a first end of the support wheel control member, a support wheel is mounted at a second end of the support wheel control member, and the support wheel comes into contact with the base in a lying position.