Disclosed is a reclining device for a vehicle seat, the reclining device includes: a flange having inner teeth; a gear plate having an outer tooth part and a coupling part, the outer tooth part provided with outer teeth and engaged with a part of the inner teeth of the flange in an eccentric state with the flange, and the coupling part having a locking step; an input device provided inside a through hole of the gear plate and coupled to a shaft to allow the flange and the gear plate to be eccentric with each other and to perform relative rotation when the shaft is rotated; and a bracket having an insertion hole, and a locking protrusion that is locked by the locking step of the coupling part formed at an inner circumferential surface of the insertion hole to prevent the relative rotation with the gear plate.

The invention relates to a vehicle seat having a seat part and a backrest part, which comprises a lower backrest part and an upper backrest part arranged adjacent thereto in the vertical direction of the vehicle seat, a displacement device being arranged with a first section, which is fixedly connected to the lower backrest part, and with a second section, which is fixedly connected to the upper backrest part, the second section being completely displaceable together with the upper backrest part relative to the lower backrest part by means of a displacement movement directed at least in part in the width direction of the vehicle seat, the first section being arranged completely below the upper backrest part in the vertical direction and forming a guideway for the displacement movement of the second section.

A reclining cushion assembly for a seat includes a fixed portion and a movable portion mounted to the fixed portion. The movable portion is movable between an upright position and a reclined position. At least one reclining and locking mechanism is mounted to the fixed portion. The at least one reclining and locking mechanism is movable between a first position and a second position. The at least one reclining and locking mechanism is operable to engage the movable portion to transform the movable portion from the upright position to the reclined position.

A lock mechanism for controlling a rotating component including an outer shaft attachable to a stationary component and having a slotted ring defining capture slots and an interior annular space, a control ring having a first end disposed in the annular space, an inner shaft attachable to a rotating component configured to rotate relative to the stationary component, and the inner shaft engaged with a second end of the control ring, a first collar rotatably disposed around the slotted ring, the first collar having a plurality of release recesses, and a plurality of first bearings respectively retained within the capture slots beneath the first collar. In a first rotational position of the first collar, the plurality of release recesses align with the capture slots to rotationally disengage the rotating and stationary components. In a second rotational position of the first collar, the plurality of release recesses misalign with the capture slots to rotationally engage the rotating and stationary components.

An occupant support adapted for use in a vehicle includes a seat bottom coupled to a floor of the vehicle and a seat back configured to pivot about a seat-back pivot axis relative to the seat bottom between an upright position and a folded-forward position. The occupant support further includes a seat-motion controller configured to control movement of the seat back relative to the seat bottom.

An adjustment mechanism for a vehicle seat includes an actuator and a driven member. The actuator is coupled to the driven member to cause the driven member to move or be freed to move in response to activating the actuator.

A back frame, which forms a framework of a seatback, includes a back side frame, a stopper, and an extending portion. The back side frame is rotatable with respect to a cushion frame in seat front-rear directions. The stopper is fixed to the back side frame and includes a contact portion. When the contact portion contacts a contact target portion that is immobile with respect to the cushion frame, the stopper restricts rotation of the back side frame. The extending portion extends from the stopper in the seat front-rear directions. The extending portion is fixed to the back side frame in at least a part of the extending portion.

A recliner heart for a vehicle seat recliner assembly may include a first plate, a second plate and one or more pawls. The first plate may define a recess. The second plate may include a first inner diametrical surface having first teeth formed thereon. The pawl may be slidably disposed in the recess between a secure position in which the pawl is engaged with a portion of the teeth of the second plate to restrict relative rotation between the first and second plates and a release position in which the pawl is disengaged from the portion of the teeth of the second plate to allow relative rotation between the first and second plates. One or both lateral sides of the pawl may include one or more slots.

A seat includes a seat-bottom frame, a seat-back frame rotatable relative to the seat-bottom frame between a forward position and a rearward position, and a first wedge and a second wedge on opposite side of the seat-back frame. The first wedge extends from the seat-back frame in the forward position to the seat-bottom frame, and the second wedge extends from the seat-back frame in the rearward position to the seat-bottom frame.

Provided is a seatback rotating device used for a vehicle seat. The seatback rotating device includes an electric motor, an action mechanism, a rotor, and an abutment target portion. In the seatback rotating device, when s seatback of the vehicle sat is placed in a first standing position, the rotor is positioned in a standby state that creates a gap between a first protrusion and the abutment target portion and a gap between a second protrusion and the abutment target portion, the first protrusion and the second protrusion being provided to the rotor. In the standby state, a gap length from the first protrusion to the abutment target portion is small relative to a gap length from the second protrusion to the abutment target portion.