Patent ID: 9609952
Date: 2017-04-04
CPC Classifications: A47C

Claim:
1. A chair comprising: a seat that is fastened on a base support unit; and a backrest that includes a back lower region and an upper shoulder region and is fastened to a back support, the back support being supported by the base support unit in a manner permitting rotation about an inclination axis, wherein the shoulder region is connected to the back support in a manner permitting inclination about a shoulder axis and is hinge-connected to the back lower region at a lumbar region, wherein the back lower region further extends along a chair element so that when the shoulder region is inclined about the shoulder axis, an angle of the shoulder region relative to the back lower region is changed, wherein the backrest includes a center region and a side region sharing a boundary with the center region and oriented frontward as a side guide, wherein when the shoulder region is inclined, the orientation of the side region relative to the center region is forcedly change, and wherein the side region is rotatable about a perpendicular axis toward the center region.