A vehicle seat includes a back frame mounted on a cushion frame via a recliner in a pivotally movable manner. The back frame has a support member connected to the recliner, and a seat back shell supported by the support member. The support member has a side plate portion and a rear plate portion facing a side surface and a rear surface of the seat back shell, respectively, and the side plate portion has a base portion fixed to the recliner, and an extension portion provided to extend more upward than the base portion. The side plate portion is fixed at the extension portion to the side surface of the seat back shell, and the rear plate portion is at least fixed in a region to the rear surface of the seat back shell, the region provided to rise from a lower position of the side plate portion.

A vehicle seat (1), transferable from a usage position for transporting persons to a non-usage position, includes a seat cushion (3) having a seat cushion support (3a), a backrest (5), a vehicle connectable base (9) and a rocker (13), which is pivotably connected by a first joint (I) to the base or to a component (11) fixed to the base and is pivotably connected by a second joint (II) to the seat cushion support. A rear foot (21) is pivotably connected by a third joint (III) to the base or to a component fixed to the base. Pivoting motion of the rear foot about the third joint is lockable. The rear foot is pivotably connected by a fourth joint (IV) to the backrest. A fifth joint (V) connects the backrest to the seat cushion support. At least one of the joints (I, II, III, IV, V) is a fitting (25).

An object of the present invention is to provide a reclining apparatus in which when a pawl is in an unlocked position, orientation of the pawl is stable, and when the pawl moves to a locked position, meshing between outer teeth of the pawl and inner teeth of a first member is stable. The reclining apparatus has at least one second cam that is provided between a cam and a second pawl, and is pressed by the cam to press the second pawl. The reclining apparatus is provided with a spring or pressing the second pawl against a pawl guide protrusion.

A seat recliner for a vehicle includes a step inserted in an assembly hole of a seat frame and a second flange, and a conventional sub-guide protrusion of a lock gear is removed. The second flange is provided with both a free section and a locking section using only a guide protrusion. The seat recliner includes: a first flange having a plurality of guide parts, and a guide space; a plurality of lock gears disposed in the guide spaces of the first flange; a lock cam disposed on the first flange; a control part disposed on the lock gears and the lock cam; and a second flange including a first part and the second part, and coupled to the seat frame by insertion of an outer circumferential surface of the second part into an assembly hole of the seat frame.

A recliner heart includes a housing member, a locking plate and a pawl. The housing member includes a plate surface having a first recess and a second recess. The locking plate includes a surface having teeth formed thereon. The pawl is movable in the first recess between a secure position in which the pawl is engaged with the teeth of the locking plate and a release position in which the pawl is disengaged from the teeth of the locking plate. The pawl includes a boss slidably received in the second recess. A first lateral side of the boss abuts against a sidewall of the second recess upon an impact event.

A vehicle seat includes: a fixed frame; a tower frame arranged at a position offset from the fixed frame toward a first side along a seat-width direction; a recliner arranged between the tower frame and the fixed frame; a tilt restriction mechanism arranged opposite to the recliner relative to the fixed frame; and an abutting member arranged on a same side as the tilt restriction mechanism relative to the fixed frame.

A vehicle-seat-recliner assembly may include first and second recliner hearts, a release handle, a cross-member, a handle pin, a handle-travel-limiter, and a reinforcement member. The release handle is connected with the first recliner heart and is rotatable relative to the brackets to move the first recliner heart between locked and unlocked states. The cross-member is connected to the recliner hearts and transmits torque from the release handle to the second recliner heart to move the recliner hearts between the locked and unlocked states. The handle pin engages the release handle. The handle-travel-limiter may include a flange portion and a shaft portion. The shaft portion may include an aperture configured to receive the cross-member. The flange portion extends radially outward from the shaft portion. The handle pin engages the handle-travel-limiter. The reinforcement member may be fixed to the handle-travel-limiter and the handle pin.

A recliner mechanism for a vehicle seat may include a guide plate, a locking plate, a pawl, an actuator hub, and a coil spring. The guide plate includes a recess and a projection. The locking plate includes a surface having teeth formed thereon. The pawl is movable in the recess between a secure position in which the pawl is engaged with the teeth of the locking plate to restrict relative rotation between the guide plate and the locking plate and a release position in which the pawl is disengaged from the teeth of the locking plate to allow relative rotation between the guide plate and the locking plate. Rotation of the actuator hub causes corresponding movement of the pawl between the secure position and the release position. The coil spring includes a first end engaging the actuator hub and a second end that hooks the projection of the guide plate.

A discontinuous recliner for a vehicle seat is provided. The discontinuous recliner comprises one or more locking pawls and a single actuating element which is configured to drive the locking pawl(s) both from the locking position to the unlocking position and from the unlocking position to the locking position. Thanks to the provision of the single actuating element, the overall number of components of the discontinuous recliner is significantly reduced. This allows to obtain a discontinuous recliner which is lighter, easier to be assembled and more reliable.

A recliner according to one aspect of the present disclosure includes a plate-shaped ratchet, at least one pawl, a plate-shaped guide member, and a ratchet seating portion. The ratchet seating portion is provided on the guide member to be positioned on an inner peripheral side of a second flange and between two guide walls adjacent to each other in a circumferential direction on the guide member. The ratchet seating portion protrudes toward the first flange of the ratchet and is configured to come into sliding contact with a tip of the first flange.