US 12,245,702 B2
Chair having a movable seat
Katsuaki Hayashi, Osaka (JP)
Assigned to KOKUYO CO., LTD., Osaka (JP)
Filed by KOKUYO CO., LTD., Osaka (JP)
Filed on Sep. 14, 2022, as Appl. No. 17/944,753.
Claims priority of application No. 2021-162894 (JP), filed on Oct. 1, 2021.
Prior Publication US 2023/0108179 A1, Apr. 6, 2023
Int. Cl. A47C 1/032 (2006.01); A47C 3/026 (2006.01); A47C 3/18 (2006.01)
CPC A47C 3/026 (2013.01) [A47C 3/18 (2013.01); A47C 1/032 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A chair comprising:
an upper base unit and a lower base unit facing each other, at least one of the upper base unit and the lower base unit including a rolling surface being curved, wherein an opening portion exists in a part of the rolling surface, and an elastic member is interposed between the opening portion and a corresponding region of an opposing surface;
a seat that is provided in the upper base unit and swings when the upper base unit rolls with respect to the lower base unit,
a connection member that connects the upper base unit and the lower base unit, wherein the opening portion is a relief hole for inserting the connection member,
wherein the upper base unit swings in a direction of 360 degrees with respect to the lower base unit, and the relief hole is provided at three or more locations around a swing center.