An electric motor for reciprocating an object along a rod having a predetermined length is provided, comprising: a housing; a rotor unit that is mounted to the inside of the housing via a bearing to be rotatable and comprises a rotor shaft, which is axially-coupled to the rod to linearly reciprocate along the rod during rotation, and a plurality of magnets mounted along the circumference direction of the rotor shaft; and a stator unit comprising at least one stator core and a coil, the at least one stator core comprising a yoke portion of a closed loop shape that is built in the housing so as to surround the circumference of the rotor unit, and a plurality of slot portions extending from the yoke portion toward the rotor, and the coil being wound around at least one slot portion among the plurality of slot portions.

A vehicle seat 10 comprising a seat base 11 and a backrest portion 13, wherein the backrest portion comprises a support structure 13. A user engagable cushioned section 14 is locatable on a user facing side 16 of the support structure 13 and the support structure 13 is shaped and dimensioned to receive at least a portion 21 of the cushioned section 14 such that the cushioned section comprises at least one localised area of increased thickness 15.

A vehicle seat 10 comprising a seat base 11 and a backrest portion 13, wherein the backrest portion comprises a support structure 13. A user engagable cushioned section 14 is locatable on a user facing side 16 of the support structure 13 and the support structure 13 is shaped and dimensioned to receive at least a portion 21 of the cushioned section 14 such that the cushioned section comprises at least one localised area of increased thickness 15.

A device for folding a seat may include: a lower arm stopper fixed to a predetermined radial position with respect to a reclining hinge shaft of a seatback as a center; a lock plate configured to rotate about a rotation shaft as a center while being hooked to the lower arm stopper in a process of reclining forward together with the seatback with respect to the reclining hinge shaft as the center; and a folding link limited to rotate by being hooked to the lock plate and configured to make folding rotation together with the seatback with respect to a folding hinge shaft, as a center, located at a part above the reclining hinge shaft, by being released from being hooked to the lock plate according to the rotation of the lock plate.

A device for folding a seat may include: a lower arm stopper fixed to a predetermined radial position with respect to a reclining hinge shaft of a seatback as a center; a lock plate configured to rotate about a rotation shaft as a center while being hooked to the lower arm stopper in a process of reclining forward together with the seatback with respect to the reclining hinge shaft as the center; and a folding link limited to rotate by being hooked to the lock plate and configured to make folding rotation together with the seatback with respect to a folding hinge shaft, as a center, located at a part above the reclining hinge shaft, by being released from being hooked to the lock plate according to the rotation of the lock plate.

A vehicle seat comprises an underframe; a backrest with a backrest frame; and a flange on each side of the backrest. Each flange is mounted so as to pivot relative to the backrest frame about a first transverse axis, and relative to the underframe about a second transverse axis.

An air cushion arrangement installable in an interior of a seat having a seat surface may have at least one air cushion and an air supply system for variably supplying the at least one air cushion with air, wherein at least one air cushion is assigned a pulsation generator, the at least one air cushion being non-fluidically connected to the pulsation generator. The air cushion and the pulsation generator are configured to generate a pulsation in a direction of the seat surface of the seat (e.g., if the air cushion arrangement were installed in the interior of the seat). A seat assembly including such an air cushion arrangement is also disclosed.

An air cushion arrangement installable in an interior of a seat having a seat surface may have at least one air cushion and an air supply system for variably supplying the at least one air cushion with air, wherein at least one air cushion is assigned a pulsation generator, the at least one air cushion being non-fluidically connected to the pulsation generator. The air cushion and the pulsation generator are configured to generate a pulsation in a direction of the seat surface of the seat (e.g., if the air cushion arrangement were installed in the interior of the seat). A seat assembly including such an air cushion arrangement is also disclosed.

A seat backrest inertial locking system configured to lock a seat backrest in place upon rapid acceleration or deceleration of a vehicle. The locking system includes an inertial mass located on an actuation ring, the inertial mass configured to cause rotation of the actuation ring when a rapid acceleration or deceleration is experienced. Rotation of the actuation ring causes longitudinal movement of a locking member into a receiving slot disposed on a truss of the seat backrest, thereby locking the seat backrest in place.

A roof airbag system includes a roof airbag, a lifting mechanism, a collision sensor, memory, and a processor coupled to the memory. The roof airbag is provided at a roof portion of a vehicle, receives a supply of gas from an inflator and deploys toward an upper body side of a vehicle occupant sitting on a vehicle seat. The lifting mechanism is provided at a seat cushion side of the vehicle seat and lifts a thigh area of the vehicle occupant. A collision sensor detects a collision of the vehicle. The processor is configured to, when a seat back of the vehicle seat is tilted more than a predetermined angle to the seat rear side and the collision sensor detects a collision of the vehicle, control the lifting mechanism to lift the thigh area of the vehicle occupant and control operation of the inflator to deploy the roof airbag.