Patent ID: 8201881

Claim:
A clutch mechanism for a vehicle seat, the clutch mechanism comprising: a pressure-receiving member rotatably assembled to a frame of a seatback of the vehicle seat; a connecting arm having a weight and provided rotatably to the pressure-receiving member; a first swinging member provided rotatably to the frame of the seatback of the vehicle seat, wherein while inertia force occurring due to a crash of a vehicle from behind acts on the weight, when the pressure-receiving member rotates upon receipt of a seatback load of a passenger of the vehicle seat, the connecting arm causes the first swinging member to rotate along with the rotation of the pressure-receiving member; and a second swinging member provided rotatably to the frame of the seatback, and configured to rotate along with the rotation of the first swinging member, wherein the second swinging member is held in a rotated state achieved when the first swinging member rotates by a predetermined angle even when the first swinging member rotates by an angle larger than the predetermined angle.