Abstract: A vehicle seat of the present disclosure includes a seat cushion; a seatback; a sliding device; a first locking mechanism configured to restrict a sliding movement of a seat main body; a tip-up mechanism configured to rotationally displace the seat cushion upwardly from an occupiable position in conjunction with a frontward rotational movement of the seatback; a second locking mechanism configured to restrict a sliding movement of the seat main body when an elevation angle of the seat cushion exceeds a preset angle, and remove the restriction when the elevation angle is equal to or below a preset removal angle; and a first restrictor configured to restrict the elevation angle from being equal to or below the removal angle when the tip-up mechanism is activated.

Abstract: A locking device for a vehicle seat including: a striker and a lock mechanism including: a base plate; a hook supported rotatably by a hook shaft to the base plate and capable of forming a locked state and an unlocked state; a pawl supported rotatably by a pawl shaft to the base plate; and a cam supported rotatably by the pawl shaft to the base plate, and the cam is rotationally biased by a first torsion coil spring, and the pawl is rotationally biased by a second torsion coil spring, and the coil of the second torsion coil spring has a larger diameter and a smaller length in a central axis direction of the coil than the coil of the first torsion coil spring, and one end of the first torsion coil spring is provided on a radially outer side than the coil of the second torsion coil spring.

Abstract: A vehicle seat of the present disclosure includes a seat cushion; a seatback; a sliding device; a first locking mechanism configured to restrict a sliding movement of a seat main body; a tip-up mechanism configured to rotationally displace the seat cushion upwardly from an occupiable position in conjunction with a frontward rotational movement of the seatback; a second locking mechanism configured to restrict a sliding movement of the seat main body when an elevation angle of the seat cushion exceeds a preset angle, and remove the restriction when the elevation angle is equal to or below a preset removal angle; and a first restrictor configured to restrict the elevation angle from being equal to or below the removal angle when the tip-up mechanism is activated.

Abstract: A locking device for a vehicle seat including: a striker and a lock mechanism including: a base plate; a hook supported rotatably by a hook shaft to the base plate and capable of forming a locked state and an unlocked state; a pawl supported rotatably by a pawl shaft to the base plate; and a cam supported rotatably by the pawl shaft to the base plate, and the cam is rotationally biased by a first torsion coil spring, and the pawl is rotationally biased by a second torsion coil spring, and the coil of the second torsion coil spring has a larger diameter and a smaller length in a central axis direction of the coil than the coil of the first torsion coil spring, and one end of the first torsion coil spring is provided on a radially outer side than the coil of the second torsion coil spring.

Abstract: A vehicle seat locking device includes: a base member having a base groove into which a striker fixed to one of fixed and movable members is inserted, and fixed to the other of the and movable members; a latch having a latch groove engageable with and disengageable from the striker, rotatably attached to the base member, and rotatable between a locked position and an unlocked position; and a cam pawl attached to the base member, rotatable between an allowable position and a preventive position and rotating from the preventive position to the allowable position when a locking release operation is performed, wherein the cam pawl has a restricting surface restricting the rotation of the latch, and a cam surface rotating in a direction toward the preventive position, coming into contact with the contact surface, rotating the latch, and restricting the rotation of the latch.