A locking mechanism for a vehicle backrest includes a rotary latch engageable over a locking striker fixed to the vehicle, a detent pawl for locking the movement of the rotary latch in a locking position, and a leaf spring. The leaf spring includes two edges attached to the mechanism in first and second support points, and is placed in the mechanism such that, in the locking position, the striker is pushed by the leaf spring in one point of a contact area defined between first and second ends. The leaf spring further includes a central reinforced area and two exterior non-reinforced areas, wherein the reinforced area has smaller elastic deformation than the non-reinforced areas. A first edge of the reinforced area is placed between the first support point and first end, and a second edge of the reinforced area is placed between the second support point and second end.

A locking mechanism for a backrest of a vehicle includes a rotary latch engageable over a locking striker fixed to the vehicle and a detent pawl having a first contact surface configured for contacting against the rotary latch, when the rotary latch rotates with a first pivoting movement, to establish a first locking position wherein the rotary latch is in engagement over the locking striker. The detent pawl includes a second contact surface configured for contacting against the rotary latch, when the rotary latch rotates with an additional pivoting movement further form the first locking position, to establish a second locking position wherein the detent pawl pushes the rotary latch against the striker.

A longitudinal adjuster (3), for a vehicle seat (1), includes a lower rail (9), an upper rail (11), moveable in relation to the lower rail (9) in a longitudinal direction (x), and a locking unit (13) for locking the upper rail (11) to the lower rail (9). The locking unit (13) includes two locking elements (VR), which, in order to lock the upper rail (11) and the lower rail (9), engage in the upper rail and the lower rail in a blocking manner in steps such that one of the locking elements (VR) pre-locks the upper rail (11) and the lower rail (9) with play in a pre-locking step and one of the locking elements (VR) locks the upper rail (11) and the lower rail (9) without play in a locking step. A vehicle seat (1) including such a longitudinal adjuster (3) is provided.

An object of the present invention is to provide a seat for a vehicle which is capable of smoothly and stably adjusting the reclining of a seat back by driving an electrical reclining motor 34, even if the electrical reclining motor 34 is diagonally mounted on a seat back frame structure in a case where the electrical reclining motor 34 is fixedly connected on a seat back frame structure, or even if the electrical reclining motor 34 becomes inclined due to a deformation of the seat back frame structure after such a fixedly connection.

There is provided a seat 10 for a vehicle comprising a seat back frame structure 12 a lower end of which is connected to a rear end of a seat cushion frame structure 14 in such a way that the seat back frame structure 12 can be inclined relative to the seat cushion frame structure 14, said seat back frame structure 12 including a pair of side frames 20A,B each of which extends in a vertical direction of the vehicle, said seat 10 for the vehicle further comprising a through-hole 28 provided on a lower end portion of each of the pair of side frames 20A,B, a connecting rod 30 extending through each of the through-holes 28 so as to be rotatable about a horizontal direction, an electrical reclining motor 34 rotating said connecting rod 30 and provided along the one of side surfaces of the one of said pair of side frames 20A,B, and a reclining apparatus 16 provided on the other of the side surfaces of each of said pair of side frames 20A,B, a bolt through-hole 72 being provided on a non-rotational driven solid portion of said electrical reclining motor 34, a bolt 74 which fits into said bolt through-hole 72 is provided for fixedly bolting said electrical reclining motor 34 on said one of the side surfaces of the one of the pair of side frames 20A,B, said bolt 74 comprising a head portion 76 and a shank portion 78 with a circular cross-section, said shank portion 78 comprises an enlarged-diameter portion 82 on its end portion and a reduced-diameter portion 84 adjacent to the enlarged-diameter portion 82 with being concentric to each other.

A suspension device for a backrest for assisting an adjustment movement may have at least one spring element with a basic body and two end portions protruding from the basic body. The device also having a bearing element with a guide opening, and a counterbearing element with a receptacle. A first end portion is arranged in the receptacle and is mounted movably in a first direction relative to the counterbearing element. A second end portion may be arranged in the guide opening and may be mounted movably in a second direction relative to the bearing element. A backrest and a seat arrangement having the suspension device are also provided.

A headrest support having a hollow cylindrical shape and into which a headrest stay is inserted, is inserted into a bracket that has a hollow cylindrical shape and is fixed to a seat back frame. A protrusion, a tip end of which is a pivot center of the headrest support, formed such that a protrusion amount thereof increases in response to insertion of the headrest stay, is provided on an outer peripheral surface of this headrest support.

A longitudinal adjuster for a vehicle seat may have a rail assembly having two rail pairs of seat rails. The respective rail pair has a fixed seat rail and a seat rail that is movable relative to the fixed seat rail. The rail assembly may also have a motor unit and a gearbox unit, which couples the motor unit and the movable seat rail. The rail assembly may also comprise a holder for receiving a gearbox housing of the gearbox unit. The holder is arranged with the gearbox unit in a hollow space formed by the one rail pair and is fixed to the movable seat rail. The holder is formed so as to be open at one end and closed at the opposite end. The holder has at least one stiffening element at the open end.

A structure in which two worm wheels are disposed across a worm provides an increase in locking reliability while maintaining stable operation during rotation. At the time of rotation, respective rotating fulcrums set at both end portions in an axial direction of a worm are supported by bearing parts. At the time of locking, a locking fulcrum set at an eccentric position on one end portion in the axial direction of the worm is supported by one bearing part, while on the other end portion in the axial direction, the rotating fulcrum is supported by the other bearing part as is. As a result, the angle of lead of the worm supported by the pair of bearing parts is changed between the time of rotation and the time of locking and becomes smaller at the time of locking than at the time of rotation, whereby an increase in locking reliability can be achieved.

A vehicle seat for accommodating at least two users includes: a seating portion frame, a first backrest and a second backrest which are pivotally hinged to the seating portion frame according to a transverse axis via a common hinge. The common hinges includes: a pivot pin comprising at least one central portion having an outer wall, and a housing, having an inner wall, arranged on the seating portion frame, and receiving interiorly the central portion of the pivot pin, by immobilizing the pivot pin. The inner peripheral wall of the housing bears against the outer wall of the central portion. The outer wall of the central portion includes at least one elastically deformable rib so as to be maintained constantly bearing against the inner wall of the housing.

A seat track assembly including a first rail and a second rail spaced apart by a distance and extending parallel with respect to one another, wherein at least one of the first and second rails having a first receiver, a second receiver, the first and second receivers longitudinally translatable with respect to each other, and a sliding member disposed therebetween, wherein the sliding member defines an aperture extending at least partially therethrough.