Height adjustment mechanism, seat adjustment device, rotation adjustment mechanism and chair

Abstract

A height adjustment mechanism, a seat adjustment device, a rotation adjustment mechanism, and a chair are disclosed. The height adjustment mechanism is disposed between a bracket assembly including a base (5) and a seat assembly including a seat (1). The height adjustment mechanism includes a support base (27) that is integral with the base or rotatably attached to the base, and two adjustment members (21). The support base supports the seat via the two adjustment members. The lower ends of the two adjustment members are pivotally connected to the support base via two first shafts (31), respectively, and the upper ends of the two adjustment members are movably connected to the seat to form two connection points. The two adjustment members are each rotatable around the corresponding first shaft, and the positions of the two connection points relative to the support base or the seat are changed to raise or lower the seat.

Images