Patent ID: 6866339

Claim:
A head rest apparatus comprising: a head rest frame supported on a seat back frame of a seat back via a tilting shaft so as to freely tilt, and having an upper side of the tilting shaft, to which a head rest is attached; a pressure receiving member provided in a lower side of the tilting shaft in the head rest frame and receiving a load applied from a front surface of the seat back to a backward portion; an urging member engaging with the seat back frame and the head rest frame and always urging the head rest frame in a backward tilting direction; and a stopper member for restricting backward tilting of the head rest frame; wherein the head rest frame tilts forward around the tilting shaft so as to move the head rest forward when the pressure receiving member is exposed to the load, the urging member thrusts an upper portion of the head rest frame in the backward tilting direction to contact the stopper member by urging a lower rear portion of the head rest frame in a forward direction; and a head rest holder for mounting the head rest thereto is provided at an upper end of the head rest frame, the head rest holder has a rear surface facing backward, and an upper end of the seat back frame has a front surface facing forward, the rear surface is brought into contact with the front surface, whereby back tilting of the head rest frame is restricted.