A vehicle seat comprising a seatback pivoting relative to a frame around the first transverse axis, a seat cushion pivoting relative to the seatback around a second transverse axis, a link pivoting relative to the seat cushion around a third transverse axis, wherein the link is further pivoting relative to the frame around a fourth transverse axis, a mechanism for releasing the angular position of the seatback relative to the frame around the first transverse axis, and an actuator, attached under the seat cushion. The angular position of the seatback relative to the frame released, the actuator commands a movement of the link relative to the seat cushion and consequently of the seatback relative to the seat cushion, from a comfort position of the seat to a flat floor position.

A vehicle seating assembly including a lower seatback. An upper seatback is operably coupled to the lower seatback. The upper seatback is pivotally mounted to the lower seatback at a pivot axis. An arcuate back support bar is disposed in the upper seatback and is configured to rotate the upper seatback between forward and rearward positions. The arcuate support bar includes first and second generally linear members and an arcuate intermediate portion disposed between the first and second generally linear members. An articulation assembly operably couples the lower seatback with the upper seatback.

A torque transfer control mechanism that suppresses output-side displacement, and including a rotation control unit that maintains a locked state when an input torque rotating a transfer mechanism is not applied, and releases the locked state when the transfer mechanism rotates. The rotation control unit includes an internal gear and lock plates that include outer teeth that can engage with inner teeth of the internal gear. When an input torque is not applied, the inner teeth of the internal gear engage with the outer teeth of the lock plates, and when the transfer mechanism is rotated, engagement between the inner teeth and the outer teeth is released. Thus, even when torque is applied from the output unit side, engagement between the inner teeth and the outer teeth is not released by the torque.

A vehicle seat reclining device includes: a ratchet and a guide assembled to be rotatable relative to each other; a plurality of pawls respectively supported by a plurality of corresponding pairs of guide walls of the guide and configured to mesh with the ratchet; and a cam configured to press the pawls in a radial direction by a biasing force of a lock spring. The guide has: welding dowels configured to be welded to a seat frame, the respective welding dowels being formed between the respective pairs of guide walls; and a hooking hole formed between a specific pair of guide walls, an end portion of the lock spring being hooked in the hooking hole. In a state before the welding dowels are welded to the seat frame, a width between the specific pair of guide walls is larger than a width between another pair of guide walls.

A vehicle seat and method for adjusting the vehicle seat uses a hinge mechanism (18), a guide mechanism (20), and a single actuation device (22) designed to function selectively either in a backrest control mode, acting on the blocking device (28) in order to move the blocking device (28) towards the release position, or in a track (30) control mode, acting on the locking device (36) in order to move the locking device (36) towards the unlocking position. The actuation device (22) is controlled by a user to cause the actuation device to function either in backrest control mode or in track (30) control mode.

An electric seat and an angle adjustment device thereof are provided. The angle adjustment device includes an inner toothed plate and an outer toothed plate engaging with each other, and an eccentric cavity formed therebetween. An eccentric ring completely occupying a positive eccentric region of the eccentric cavity is provided in the eccentric cavity. The eccentric ring has a first accommodating region and a second accommodating region along a circumferential direction. The angle adjustment device further comprises a driving component for driving rotation of the eccentric ring. A damping component is provided in the first accommodating region and/or the second accommodating region, and the damping component is in a compressed state during operation of the driving component. The damping component eliminates a useless stroke in the above operation, thereby eliminating an adjustment lag experienced by a passenger during reverse adjustment of a seat and backrest.

A vehicle seat reclining apparatus includes: a protruding portion protruding toward an inner side in a radial direction so as to be abutted by another pawl in a circumferential direction when a specific pawl abuts, in the circumferential direction, against a step formed at a boundary between a first region and a second region; and a restricting portion configured to restrict a movement range of the another pawl regulated by a regulating portion to an inner side in the radial direction than a position where the another pawl and the protruding portion interfere with each other in the radial direction.

A vehicle seat reclining device includes: a ratchet and a guide assembled to be rotatable relative to each other; a plurality of pawls respectively supported by a plurality of corresponding pairs of guide walls of the guide and configured to mesh with the ratchet; and a cam configured to press the pawls in a radial direction by a biasing force of a lock spring. The guide has: welding dowels configured to be welded to a seat frame, the respective welding dowels being formed between the respective pairs of guide walls; and a hooking hole formed between a specific pair of guide walls, an end portion of the lock spring being hooked in the hooking hole. In a state before the welding dowels are welded to the seat frame, a width between the specific pair of guide walls is larger than a width between another pair of guide walls.

A seat reclining device for a vehicle is configured such that an operating surface section and a projection of a pole are disposed at locations separate from each other along the radial direction of a body surface section, and are half-punched from the body surface section in one direction along the axial direction so as to form projections. A pressed surface section of the pole is provided on an edge surface of the body surface section formed on the other side in the axial direction of the operating surface section along with the half-punched projection of the operating surface section.

A vehicle seat comprising a seatback mounted pivoting by an articulation mechanism selectively lockable and unlockable, relative to a seatback footing selectively lockable and unlockable on a base, where the seat further comprises a seat cushion, first and second rear connecting rods connecting the seatback to the base, an actuating device being configured, by rotation of the first rear connecting rod, for driving the seatback into a folded down position when the articulation mechanism is unlocked and the seatback footing is locked on the base, and for driving the seat in a forward tilted position when the seatback footing is unlocked and the articulation mechanism is locked.