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.

A vehicle seat assembly and a method of controlling a vehicle seat assembly are provided. The vehicle seat assembly has a seat back frame rotatably connected to a support frame, and a seat back frame positioning assembly connected to the support frame and the seat back frame. The seat back frame positioning assembly has an electric motor, and a worm connected to the motor shaft for rotation. The seat back frame positioning assembly has a reduction gearset with a first gear in meshed engagement with the worm and driving a second gear. The second gear is connected to the support frame. A controller controls the motor such that the motor shaft rotates at a first speed and at a second speed greater than the first speed, with the seat back frame is rotated relative to the support frame in response to rotation of the motor shaft.

A seat for an aircraft may comprise a seat pan and a back support coupled to the seat pan. An upper thoracic support may be located proximate an end of the back support opposite the seat pan. The upper thoracic support may be configured to rotate relative to the back support. A headrest may be coupled to the upper thoracic support.

A track system includes a track member with an elongate shaft mounted thereto. At least one support mechanism is mounted to the track member. The at least one support mechanism includes a housing. An engagement feature includes first and second engagement members spaced-apart from one another to define a receiving area therebetween. The first and second engagement members are operable between deployed and retracted positions relative to the housing. The elongate shaft is received in the receiving area when the first and second engagement members are in the deployed position.

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.

A control mechanism for a lock pawl comprises an electric motor mounted in a housing that is connected with the seat backrest and has an output shaft with a worm gear engaging with the spur gearing of a transmission gear rotary-mounted on a transmission pivot and having on its frontal surface an eccentric selector pivot for controlling the pawl of the lock, swing-mounted on a pawl pivot between a blocking position, in which the pawl blocks a rotary ratchet of the lock from releasing a catch eye connected with the car bodywork, and an unlocking position, in which the pawl releases the rotary ratchet to release the catch eye, the pawl having a radial selector arm, which in the blocking position of the pawl interferes with the circular trajectory of the selector pivot to enable the selector pivot to engage with the selector arm, whereas the pawl has a radial control arm.

A motor vehicle comprises two front seats aligned in a transverse direction, and at least one rear seat. Said at least one rear seat comprises a seating portion with a seating portion frame, a backrest with a backrest frame. The backrest frame is pivotable relative to the seating portion frame about a first transverse axis, between at least one deployed position for receiving an occupant of the seat and a folded position in which the backrest frame is folded down to face the seating portion frame. Said at least one rear seat is adapted to have a configuration in which said at least one rear seat is in said folded position and the backrest of said at least one rear seat extends at least partly between the two front seats.

A seat for an aircraft may comprise a seat pan and a back support coupled to the seat pan. An upper thoracic support may be located proximate an end of the back support opposite the seat pan. The upper thoracic support may be configured to rotate relative to the back support. A headrest may be coupled to the upper thoracic support.

Proposed is an actuator for a recliner which can be manufactured with components having simple structures to reduce weight, and functions of a seat operated through different cables are independently performed stably. The actuator for a recliner includes: a casing part, and a drive part provided with a worm wheel gear located inside the casing part and rotated by an operation of a motor, and a rack gear configured to move elastically toward a first or second side of the drive part in engagement with the worm wheel gear, with cables being coupled respectively to the first and second sides of the rack gear.

A seat 1 has a seat cushion 2 and a seat back 3 and is mounted on a vehicle such as a car. A reclining mechanism 4 capable of adjusting the tilt angle of the seat back 3 is provided between the seat cushion 2 and the seat back 3. The reclining mechanism 4 has a seat driving device 21 provided with an electric motor 22 and a speed reduction mechanism 23. The speed reduction mechanism 23 has a worm shaft 45 connected to a motor shaft 34 of the motor 22 and a worm wheel 47 meshed with a worm 46 of the worm shaft 45. The worm 46 is a multi-thread worm having two or more threads.