Patent ID: 7992938

Claim:
A seat reclining apparatus for a vehicle comprising: a pair of first arms adapted to support a seat cushion of a seat; a pair of second arms adapted to support a seat back of the seat and be rotatably supported relative to the first arms; a pair of hinge pins inserted thorough the first arms and the second arms; a pair of reclining mechanisms including a pair of lock mechanisms, each of which includes a cam provided between the first arm and the second arm and supported by the hinge pin so as to be integrally rotatable, keeping a clearance between the cam and the hinge pin, the lock mechanism restricting a rotational movement of the seat back relative to the seat cushion and releasing a restriction of the rotational movement of the seat back relative to the seat cushion, by means of a rotational movement of the hinge pins and the cams; and a connecting member provided between the reclining mechanisms and connected to the hinge pins so as to be integrally rotatable, wherein each of the hinge pins is structured so as to be inserted into each of the reclining mechanisms from an inward position of the seat to an outward position of the seat, and a connecting portion is provided at an inner end of the hinge pins facing the other one of the hinge pins and is connected to the connecting member, wherein the connecting portion includes a socket into which an end portion of the connecting member is fitted, and an abutment portion configured to contact an inner surface of one of the reclining mechanisms, the inner surface of the one reclining mechanism facing the other one of the reclining mechanisms.