US 12,232,622 B2
Folding step stool
Xuelin Zhu, Suqian (CN); Baisong Yao, Suqian (CN); and Weiqiang Liu, Suqian (CN)
Assigned to JIANGSU ZHOU JIJIE INTELLIGENT TECHNOLOGY CO., LTD., Suqian (CN)
Filed by JIANGSU ZHOU JIJIE INTELLIGENT TECHNOLOGY CO., LTD., Suqian (CN)
Filed on Jul. 26, 2021, as Appl. No. 17/384,830.
Claims priority of application No. 202121085854.6 (CN), filed on May 19, 2021.
Prior Publication US 2022/0369820 A1, Nov. 24, 2022
Int. Cl. A47C 12/00 (2006.01); E06C 1/393 (2006.01)
CPC A47C 12/00 (2013.01) [E06C 1/393 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A folding step stool, comprising a stool surface and a support structure for supporting the stool surface, wherein
the support structure is a foldable structure, the support structure comprises at least three support shafts, and the stool surface is hinged to a rear side of a connecting line of tops of two adjacent support shafts;
the folding step stool is structured such that, after being folded, the support structure is located on a first side of a plane formed by the two adjacent support shafts hinged to the stool surface; and after the stool surface is turned after the support structure is folded, the stool surface is located on a second side of the plane formed by the two adjacent support shafts hinged to the stool surface, and the support structure abuts against the two adjacent support shafts hinged to the stool surface,
wherein the support structure comprises a rear plate and side plates hinged to two sides of the rear plate, and the stool surface is hinged to a top of the rear plate,
wherein the stool surface comprises a primary stool surface, a secondary stool surface, and an intermediate plate, wherein the secondary stool surface is hinged to the top of the rear plate, the intermediate plate is disposed between a front plate and the rear plate, and the primary stool surface is hinged to the intermediate plate,
wherein the secondary stool surface is higher than the primary stool surface, the side plates comprise primary side plates and secondary side plates, wherein the primary side plates are disposed on two sides of the front plate and hinged to the front plate, the secondary side plates are disposed on two sides of the rear plate and hinged to the rear plate,
wherein each of the primary side plates comprises two primary hinge plates and the two primary hinge plates are hinged together,
each of the secondary side plate comprises two secondary hinge plates and the two secondary hinge plates are hinged together,
one of the two primary hinge plates is hinged to the intermediate plate, one of the two secondary hinge plates is hinged to the intermediate plate,
a primary link structure is disposed between the front plate and the intermediate plate for driving the primary side plates to be folded or unfolded when the primary stool surface is turned,
a secondary anti-deviation structure is disposed between the rear plate and the intermediate plate for preventing the rear plate against lateral deviation, and
the primary link structure comprises a first hinge member disposed between the front plate and the primary stool surface, the first hinge member has a first end hinged to the front plate and a second end hinged to the primary stool surface, and a length of the first hinge member is greater than half of a width of the primary side plates.