Chair with inclinable back rest

Details Chair with inclinable back rest Chair with inclinable back rest

A - Human Necessities

47

C

A47C 1/025 (2006.01) A47C 1/032 (2006.01)

Patent

CA 2648254

The present invention relates to a chair or armchair, in particular a rotatable office chair, comprising: at least two seat carriers, each further comprising an upper arched guide and a lower arched guide, and at least two back rest carriers, each further comprising a restrictedly guided region, and a back rest arranged on back rest carriers, wherein the restrictedly guided region of the at least one back rest carrier is guided between the upper arched guide and the lower arched guide of the at least one seat carrier, thus allowing the at least one back rest carrier to be inclined relative to the seat carrier, wherein the upper arched guide and the lower arched guide are embodied at least in certain regions as an arc of a circle portion and wherein the arc of a circle portion of the upper arched guide and the arc of a circle portion of the lower arched guide have the same centre of a circle H. The office chair further comprises a base carrier; at least one pull spring lever which is articulated to the seat carrier by means of a rear seat coupling shaft; at least two coupling levers which are articulated to the seat carrier by means of a front seat coupling shaft, wherein the at least two pull spring levers are articulated by means of a main shaft and the at least two coupling levers are articulated to the base carrier by means of a base coupling shaft; at least two pull rods which are arranged in an articulated manner on the at least one back rest carrier and at least two pull levers which are arranged on the main shaft and which are each articulated to the at least two pull rods.

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