| 摘要 |
Device for synchronizing the tilt of the backrest and of the seat of a chair, of the type comprising a frame (1) of the backrest, a frame (4) of the seat (2) and a support integral with the base of said chair, as well as a first crank (3), integral with said backrest frame, and hinged in the rear portion of said seat frame and said support, and at least one second crank (5) hinged in the front portion of said seat frame (4) and to said support. The first crank (3) and the second crank (5) form, together with the seat frame, a four-bar linkage (3, 4, 5). An adjusting lever (6) is constrained to the four-bar linkage (3, 4, 5) and is further operatively connected to a movable fulcrum (7) and elastic means (8). |
