US 12,144,429 B2
Foldable plastic-steel chair
Luhao Leng, Xiamen (CN)
Assigned to New-Tec Integration (Xiamen) Co., Ltd., Xiamen (CN)
Filed by New-Tec Integration (Xiamen) Co., Ltd., Xiamen (CN)
Filed on Jul. 25, 2022, as Appl. No. 17/872,321.
Application 17/872,321 is a continuation of application No. PCT/CN2021/078154, filed on Feb. 26, 2021.
Claims priority of application No. 202011052435.2 (CN), filed on Sep. 29, 2020.
Prior Publication US 2022/0354256 A1, Nov. 10, 2022
Int. Cl. A47C 4/18 (2006.01); A47C 4/14 (2006.01); A47C 4/20 (2006.01); A47C 4/42 (2006.01); A47C 4/44 (2006.01); A47C 4/48 (2006.01); A47C 5/04 (2006.01); A47C 5/06 (2006.01); A47C 5/12 (2006.01)
CPC A47C 4/14 (2013.01) [A47C 4/18 (2013.01); A47C 4/20 (2013.01); A47C 4/42 (2013.01); A47C 4/44 (2013.01); A47C 4/48 (2013.01); A47C 5/043 (2013.01); A47C 5/06 (2013.01); A47C 5/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A foldable plastic-steel chair, comprising:
a seat board assembly,
a backrest, and
a metal supporting frame, wherein:
the seat board assembly and the backrest are connected to the metal supporting frame,
the seat board assembly comprises a seat board,
the seat board comprises a surface plate and a surrounding edge connected to a periphery of the surface plate and extending downward,
the seat board is a vacuum-formed plastic board,
the seat board assembly further comprises a metal frame abutting a periphery of the seat board,
a bottom end of the metal frame is bent outward to form a hook,
a lower end portion of the surrounding edge of the seat board is disposed in the hook,
a portion of the metal frame abuts an inner side of the surrounding edge,
the hook is fixedly clamped to a lower edge of the surrounding edge,
a connecting portion of the surface plate and the surrounding edge define a transition shoulder, so that an upper step and a lower step are formed between the surrounding edge and the surface plate, and
the lower step is at least supported by the metal frame.