Patent ID: 7311361

Claim:
An apparatus for simultaneously folding a seat back and an armrest, installed on a base of a chair, comprising: a seat assembly mounted on the base of the chair; a seat back assembly pivoted to the seat assembly; a pivoting assembly pivoted in the seat assembly and both ends of the pivoting assembly protrude out of the seat assembly; two armrests arranged at both sides of the seat assembly and the seat back assembly, an end of each of the armrests is pivoted to the seat back assembly, and another end of the armrests is pivoted to the pivoting assembly; and an adjusting assembly disposed between the seat assembly and the seat back assembly for controlling motion of the seat back assembly and the armrests; wherein the seat assembly includes: a lower board, a pivoting groove with both ends open is formed in the lower board for receiving said pivoting assembly therein, a side of the lower board is folded upward to form a receiving space, sidewalls are located at each side of said receiving space, a recess is formed in each sidewall, and a limiting hole is formed in a center of the recess; an upper board fixed on the lower board and covering the pivoting assembly, an end of the upper board abuts against the receiving space; and a cushion placed on the upper board, one end of the cushion abuts against the receiving space.