The invention relates to a headrest comprising a base (13) and a head-support part (16) having a guide assembly (18, 52) connected to the head-support part (16) and is connected to the base (13) that moves the head-support part (16) relative to the base (13) in a direction (x.sub.1) toward the seat occupant's head and in the opposite direction (x.sub.2) between a rear normal position and a frontmost extended position.

The invention relates to a headrest comprising a base (13) and a head-support part (16) having a guide assembly (18, 52) connected to the head-support part (16) and is connected to the base (13) that moves the head-support part (16) relative to the base (13) in a direction (x.sub.1) toward the seat occupant's head and in the opposite direction (x.sub.2) between a rear normal position and a frontmost extended 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.

It is provided a head restraint arrangement for a vehicle seat, with a head restraint which is adjustable along two spatial axes and with an actuating device, by means of which at least one locking device which, in a locked state, blocks the head restraint against adjustment in at least one spatial direction along one of the spatial axes, is manually actuatable in order to remove a block and to permit an adjustment of the head restraint. The actuating device comprises an actuating element which is provided on the head restraint and, for actuation of the locking device, is mounted displaceably along at least one of the spatial axes.

It is provided a head restraint arrangement for a vehicle seat, with a head restraint which is adjustable along two spatial axes and with an actuating device, by means of which at least one locking device which, in a locked state, blocks the head restraint against adjustment in at least one spatial direction along one of the spatial axes, is manually actuatable in order to remove a block and to permit an adjustment of the head restraint. The actuating device comprises an actuating element which is provided on the head restraint and, for actuation of the locking device, is mounted displaceably along at least one of the spatial axes.

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.

A headrest may be fixed relative to a seat or a bank of seats in a vehicle and can provide multiple stages of deformation in response to a collision event. The headrest can include a resilient member that deforms in response to a first force caused by the collision event. The headrest can also include a frame that deforms in a first manner in response to a second force greater than the first force and in a second manner in response to a third force greater than the second force. Such a headrest can provide improved impact mitigation for occupants, regardless of height and/or weight such that occupants ranging from the 5.sup.th to 95.sup.th percentile in height and/or weight are afforded similar impact mitigation despite a fixed headrest structure. In some examples, multiple such headrests may be conjoined.

A headrest may be fixed relative to a seat or a bank of seats in a vehicle and can provide multiple stages of deformation in response to a collision event. The headrest can include a resilient member that deforms in response to a first force caused by the collision event. The headrest can also include a frame that deforms in a first manner in response to a second force greater than the first force and in a second manner in response to a third force greater than the second force. Such a headrest can provide improved impact mitigation for occupants, regardless of height and/or weight such that occupants ranging from the 5.sup.th to 95.sup.th percentile in height and/or weight are afforded similar impact mitigation despite a fixed headrest structure. In some examples, multiple such headrests may be conjoined.

An adjustment mechanism for a seat comprises at least one screw shaft (111, 112) and a motor for driving the at least one screw shaft (111, 112). Further, the adjustment mechanism comprises at least one nut element (121, 122) engaged with the at least one screw shaft (121, 122) in such a way that a rotation of the at least one screw shaft (111, 112) caused by the motor translates into a linear motion of the at least one nut element (121, 122). In a first range of the linear motion of the at least one nut element (121, 122) the linear motion translates into adjustment of the seat according to a first degree of freedom, and in a second range of the linear motion of the at least one nut element (121, 122) the linear motion translates into adjustment of the seat according to a second degree of freedom.