Patent ID: 6843533

Claim:
A reclining apparatus comprising: a fixed plate in which a first guide portion having a pair of mutually opposing guide walls and a second guide portion having a pair of mutually opposing guide walls are formed; a shaft having an axis provided in the fixed plate so as to allow the shaft to freely rotate about the axis; a rotary plate relatively rotating around the shaft with respect to the fixed plate and in which an internal gear is formed along a circular arc around the shaft; a first slide gear received between respective guide walls of the first guide portion and freely moving between a lock position engaged with the internal gear and a lock canceling position moving apart from the internal gear; and a second slide gear received between respective guide walls of the second guide portion and freely moving between a lock position engaged with the internal gear and a lock canceling position moving apart from the internal gear; and a cam member provided between the first and second slide gears and simultaneously driving the first and second slide gears between the lock position and the lock canceling position, wherein the cam member has a pair of hook portions engaging with receiving portions respectively formed in the first and second slide gears, the receiving portion overlaps with a center line of the slide gear in an area inside both side surfaces of the slide gear, the hook portion overlaps with the center line of the slide gear when the cam member drives the first and second slide gears to the lock canceling position.