Patent ID: 6796611
Filing Date: 2004-09-28
Classification: A47C

Abstract:
A synchronizing mechanism for office chairs, comprisinga base carrier (1) to be placed on a chair column, a backrest carrier (3), which is articulated to the base carrier (1) such that it is pivotable about a transverse axis (5), a seat carrier (4), which is pivotable about a transverse axis (11) in A region of its front end via a turning-and-sliding joint (17) and slideable in a longitudinal direction (SL) of the seat together with the base carrier (1), and coupled with the backrest carrier (3) such that it pivots in a region of its back end about a transverse axis (22), as well as a spring arrangement (23) to actuate the synchronizing mechanism to counter its synchronized adjusting motion of the seat carrier (4) and backrest carrier (3), wherein the spring arrangement (23) incorporates at least one helical compression spring (24) disposed essentially parallel to a sliding direction of the seat carrier (4), flat underneath the same, wherein for each helical compression spring (24) a counter-bearing extension arm (25) is provided, a front end of which is articulated to the base carrier (1) and a rear-facing end of which, freely projecting, forms a counter bearing (27) for a rear support of the helical compression spring (24), and wherein the at least one helical compression spring (24) is supported in each case with its front end on a counter bearing (28) formed on the seat carrier (4).