MECHANISM FOR A CHAIR COMPRISING A SYNCHRONOUS MECHANISM; METHOD FOR WEIGHT ADJUSTMENT FOR AN IMPROVED DYNAMIC FEEL OF SITTING FOR THE USER BY MEANS OF A MECHANISM FOR A CHAIR COMPRISING A SYNCHRONOUS MECHANISM

摘要

The invention is based on a mechanism (1) for a chair having a synchro mechanism by means of which a seat surface structure and a backrest structure are moved in a synchronized ratio relative to one another, wherein the mechanism (1) serves to adjust a restoring force of the synchro mechanism to a different body weight of a seat user by changing a working angle of a force accumulator, and the mechanism (1) includes a seat support (8) for the seat surface structure, a bearing yoke (5), the force accumulator unit (2) a backrest support (3) for supporting the backrest structure, and a translational bearing (16), wherein the mechanism (1) has a triangular steering block (21) and the force accumulator unit (2) is connected to the triangular steering block (21), and on a weight adjustment method for an improved dynamic sitting experience on the part of the seat user by means of a mechanism (1) for a chair with a synchro mechanism, in which the position of a first pivot point (31) of the force accumulator unit (2) is shifted by means of the adjuster (11) when the backrest support (3) is in a position (A), and a swivelling motion of the backrest support (3) into a second position (B) is not performed until the first step is completed.