A headrest has a base carrying the headrest on a seat, a head piece forming an abutment for a head, and a four-bar linkage including a first link and at least one second link therebehind in a direction of displacement. Each link is secured at one pivot with the base and at another pivot with the head piece such that the head piece is movable by the four-bar linkage relative to the base between a first end position and a second end position. An adjuster can alter and/or arrest the relative position between one of the links and the head piece, or between one of the links and the base. This adjuster has a first slotted link fixed on one of the first and second links, a second slotted link fixed on the head piece or the base, and a slide block engaged in slots of the first and second slotted links.

A headrest for a seat having a backrest frame and a base. The headrest includes a displacement member mountable to the backrest frame to position a lower end of the displacement member in front of the backrest frame and above the base. The displacement member is displaceable relative to the backrest frame to adjust a height of the headrest. A tilt member extends between a pivot end pivotably mounted to the displacement member at a joint, and a head support end disposed above the pivot end to support a rear portion of the head. The joint defines a pivot axis and is positioned in front of the backrest frame and above the base. The tilt member is pivotable about the pivot axis to displace the head support end toward and away from the displacement member.

A seat including a seat portion, a backrest, and a headrest attached to a structure of the backrest. The headrest includes a head cushion attached to the backrest by at least one headrest arm; the arm is hingedly attached to the backrest structure by a pivot link with a transverse axis; the head cushion is hinged to the arm by a pivot link with a transverse axis. Moreover, the first axis is situated at a rear face of a structural part of the backrest; the second axis is situated close to the bottom edge of the head cushion; in the lowered position, the arm holds the head cushion bearing against the front face of the backrest; in the raised position, the arm holds the head cushion above and in front of the lowered position.

A seat including a seat portion, a backrest, and a headrest attached to a structure of the backrest. The headrest includes a head cushion attached to the backrest by at least one headrest arm; the arm is hingedly attached to the backrest structure by a pivot link with a transverse axis; the head cushion is hinged to the arm by a pivot link with a transverse axis. Moreover, the first axis is situated at a rear face of a structural part of the backrest; the second axis is situated close to the bottom edge of the head cushion; in the lowered position, the arm holds the head cushion bearing against the front face of the backrest; in the raised position, the arm holds the head cushion above and in front of the lowered position.

The invention relates to a self-reset adjusting mechanism, including: a mounting base; an adjusting member rotatably mounted on the mounting base; a first reset member mounted between the adjusting member and the mounting base; a limiting member rotatably mounted on the mounting base, the limiting member being provided with, corresponding to the adjusting member, a plurality of clamping tables at different heights, and the position of the adjusting member being adjusted by clamping the adjusting member on the clamping tables corresponding to the limiting member; and a second reset member mounted between the limiting member and the mounting base, when the limiting member is rotated to the limit position, the second reset member being deformed to produce an acting force in a direction the same as the rotation direction of the limiting member to cause the limiting member to be in the limit position, and in this case, the first reset member resetting the adjusting member and exerting a reset acting force on the limiting member, so that the second reset member is restored and the limiting member is reset. The self-reset adjusting mechanism of the invention simplifies a core mechanism of a headrest while ensuring the strength of the headrest, has a simple structure, occupies a small space, and has a large adjustment range and a high impact resistance strength.

A headrest, for a vehicle seat, is reversibly transferable between a first latching position and a second latching position by a translation movement. The headrest has a shaft co-rotating with the translation movement. The shaft is connectable in the first latching position and in the second latching position to a latching element. The latching element is connected to the shaft via an elastic component. A system for forming an alignment device which can be integrated in a headrest is further provided.

A headrest, for a vehicle seat, is reversibly transferable between a first latching position and a second latching position by a translation movement. The headrest has a shaft co-rotating with the translation movement. The shaft is connectable in the first latching position and in the second latching position to a latching element. The latching element is connected to the shaft via an elastic component. A system for forming an alignment device which can be integrated in a headrest is further provided.

The invention relates to a motor vehicle seat for motor vehicles comprising an adjustment device for a backrest head adjustment, the motor vehicle seat having a backrest, which has a backrest frame as the first component of the backrest head adjustment and a backrest head as the second component of the backrest head adjustment, and an actuator. The backrest head is pivotably connected to the backrest frame and the actuator has a driving element and a movable element, the actuator being connected to the backrest frame and the backrest head and it being possible to carry out a linear movement by means of the actuator. The driving element of the actuator is rigidly connected to the backrest frame or backrest head and the movable element of the actuator has a guide element which engages in a guide arranged on the backrest frame or backrest head.

A vehicle seat includes a headrest assembly coupled to a seatback which has an adjustment mechanism for adjusting a headrest bun between extended and retracted positions. A plate member is positioned between the seatback and the headrest assembly and coupled to a substantially rigid frame through an extendable member. The adjustment mechanism comprises a linkage to move the plate member towards a deployed position.

A vehicle seat includes a headrest assembly coupled to a seatback which has an adjustment mechanism for adjusting a headrest bun between extended and retracted positions. A plate member is positioned between the seatback and the headrest assembly and coupled to a substantially rigid frame through an extendable member. The adjustment mechanism comprises a linkage to move the plate member towards a deployed position.