Armrest adjustment mechanism for chair, has fastening hole formed at connecting piece, so that body, plate and movable piece are rotated with respect to disc, where body and plate are moved forward and backward opposite to movable piece

摘要

The mechanism has a main body (10) fastened below a lower plate (20) and a movable piece (40) provided between two position strips. A connecting piece (30) is connected with a disc using a central hole, and a fastening hole is formed at ends of the piece (30), so that the body, plate and the piece (40) are rotated with respect to the disc. The body and the plate are moved synchronously forward and backward opposite the piece (40).