The backrest adjusting mechanism comprises a base, a cushion, a supporting frame, a backrest, an air pressure rod, a connecting rod and a steel wire core; the cushion is fixed to a top of the adjusting base; the supporting frame is rotationally connected to a rear end of the adjusting base; the backrest is fixed on the supporting frame; the air pressure rod is rotationally connected with the supporting frame; the rear end of the base is provided with a fixing frame; the connecting rod is rotationally connected with the fixing frame and a movable rod; the connecting rod and the fixing frame are provided with a limiting block; when the backrest is used, two of the limiting block are propped against each other to fix the backrest at a specific position.

A side bolster adjustment apparatus of a vehicle seat may include a guide frame which is mounted to a seat back frame, and is formed with a guide groove; a slider which slides along a direction in which a bolster protrudes from a seat back, which is the longitudinal direction of the guide groove, by a guide means formed in the guide groove; a lead screw which is provided to penetrate the slider, and is mounted in the longitudinal direction of the guide groove; a motor which is coupled to the lead screw and selectively rotate the lead screw; and a bolster plate which is coupled to the slider, and rotates around a vertical longitudinal direction of the seat back by operation of the slider.

A device for tilting a seat cushion of a fold and dive seat includes: a pair of seat cushion side frames spaced apart from each other; seat back side frames connected to the pair of seat cushion side frames; a seat cushion main-frame connected to the seat back side frames; guide brackets, one of which disposed on a first side of a front portion of the seat cushion main-frame and another of which disposed on a second side of the front portion of the seat cushion main-frame, wherein each of the guide brackets has a longitudinal through-hole; a tilting support bar, both ends of which extend through the through-holes, respectively; tilting support links, each of which connected between the tilting support bar and each seat cushion side frame; a mounting bracket disposed on the front portion; and a tilting drive device disposed between the mounting bracket and the tilting support bar.

A vehicle seat includes a seat base and a backrest. A seat base track arrangement has a fixed track and a moveable track that is moveable along the fixed track. The seat base fixed track is connected to a vehicle seat support or fore/aft track to adjust an entire vehicle seat position. The seat base moveable track is connected to the seat base. A backrest track arrangement has a backrest fixed track and a backrest moveable track that is moveable along the backrest fixed track. The backrest fixed track is connected to a vehicle backrest support. A link arm pivotably links the seat base and the backrest. A seat base pivot connection is formed between the link arm and the seat base. A link arm and backrest pivot connection is formed between the link arm and the backrest and the moveable track.

A backrest for a vehicle seat, comprising a backrest frame on which a backrest head support element provided for supporting a seat user in the shoulder region can be pivoted. In particular, the support element can be pivoted via a drive unit arranged on the support element and a lever mechanism which interacts with the drive unit so as to be actuated by an external force.

A backrest for a vehicle seat, comprising a backrest frame on which a backrest head support element provided for supporting a seat user in the shoulder region can be pivoted. In particular, the support element can be pivoted via a drive unit arranged on the support element and a lever mechanism which interacts with the drive unit so as to be actuated by an external force.

A vehicle seat including: a seat cushion on which a passenger is able to be seated; a seat back that is attached to a rear end of the seat cushion; and an electric component that is provided to at least one of the seat cushion and the seat back, wherein a fastening member is provided to the rear end of the seat cushion or a lower end of the seat back, an electric wire for supplying an electric power to the electric component is fastened to the rear end of the seat cushion or the lower end of the seat back by the fastening member, and one of the seat cushion and the seat back to which the fastening member is provided includes a contact regulation portion that is located behind the fastening member.

A side bolster adjustment apparatus of a vehicle seat may include a guide frame which is mounted to a seat back frame, and is formed with a guide groove; a slider which slides along a direction in which a bolster protrudes from a seat back, which is the longitudinal direction of the guide groove, by a guide means formed in the guide groove; a lead screw which is provided to penetrate the slider, and is mounted in the longitudinal direction of the guide groove; a motor which is coupled to the lead screw and selectively rotate the lead screw; and a bolster plate which is coupled to the slider, and rotates around a vertical longitudinal direction of the seat back by operation of the slider.

An electronically-activated support positioning system for a passenger seat can include a sensor capable of detecting a tactile input from a passenger and sending a signal, optionally through a controller, to a lock actuator coupled to a lockable hydraulic spring to either lock or unlock the lockable hydraulic spring. The lockable hydraulic spring can control movement of a support of the passenger seat, such as reclining of a seatback. In an example, when tactile input is detected, the lock actuator can unlock the lockable hydraulic spring, allowing an attached seatback to be adjusted. When tactile input is no longer detected, the lock actuator can lock the lockable hydraulic spring, securing the seatback from adjustment. The sensor can be sufficiently small to fit within the confines of an armrest. The sensor can be a microswitch positioned to detect deflection of a tab formed in the wall of the armrest.

The present invention relates to a reclining device (1) for a vehicle seat of the kind comprising a first plate carrying an internal gear (5) and a second plate carrying an external gear (11) configured to cooperate with the internal gear. The reclining device includes a first and second wedge elements (17a, 17b) for exerting a wedge effect and preventing accidental, undesired rotation of the external and internal gears relative to each other. The reclining device (1) further comprises a lock spring (21). According to the invention the lock spring (21) comprises a wedge engaging element (35) that can be brought to abut and engage a lock spring abutment surface (37a, 37b) of a wedge element. Thanks to this arrangement, the lock spring directly interacts with the wedge elements and directly restricts self-rotation of said wedge elements, which avoids any loss of force and function between said lock spring and said wedge elements.