Abstract: A vehicle seat (1) as a head-rest (5) which is mounted for movement about a horizontal axis defined by a bar (7) depending arms (12) extend downwardly into the back of the seat and carry a pressure plate (13) at a position behind the torso of the occupant of the seat so that pressure applied to the pressure plate (13) will cause the head-rest (5) to move forwardly. The pressure plate (13) is pivotally connected (14, 15, 16, 17) to the arms (12) to enable the arrangement to pivot to the maximum extent in a situation where the rear part of the seat is rigid, for example if the seat is a rear seat in a motor vehicle.

Abstract: A vehicle seat has a back-rest (1) carrying a head-rest (2). A mechanism is provided to move the head-rest (2) forwardly relative to the back-rest (1) in response to a rear impact situation. An element (9) is operatively located between the head-rest (2) and the mechanism (6) which is adapted to yield when exposed to a force in excess of a predetermined force. Thus the force that can be applied by the head-rest (2) to a head (8) of an occupant of the seat, is limited to be a maximum of 200 Newtons, with the preferred value being 100 Newtons.

Abstract: A head-rest arrangement for a vehicle seat includes a head-rest mounted in position on a vehicle seat so that it can move forwardly from an initial position to a final position. A spring mechanism is provided to move the head-rest. A release mechanism is actuated by movement of a pressure responsive element within the back of the seat to initially prevent operation of the spring mechanism, and to release the spring mechanism when pressure is applied during a rear impact.

Abstract: A vehicle seat (1) as a head-rest (5) which is mounted for movement about a horizontal axis defined by a bar (7) depending arms (12) extend downwardly into the back of the seat and carry a pressure plate (13) at a position behind the torso of the occupant of the seat so that pressure applied to the pressure plate (13) will cause the head-rest (5) to move forwardly. The pressure plate (13) is pivotally connected (14, 15, 16, 17) to the arms (12) to enable the arrangement to pivot to the maximum extent in a situation where the rear part of the seat is rigid, for example if the seat is a rear seat in a motor vehicle.

Abstract: A head-rest arrangement for a vehicle seat includes a head-rest mounted in position on a vehicle seat so that it can move forwardly from an initial position to a final position. A spring mechanism is provided to move the head-rest. A release mechanism is actuated by movement of a pressure responsive element within the back of the seat to initially prevent operation of the spring mechanism, and to release the spring mechanism when pressure is applied during a rear impact.

Abstract: A head-rest arrangement for a motor vehicle includes a rear part and a front part mounted on the rear part by a parallel arm linkage. A spring biases the front part forwardly. A releasable catch holds the two parts together until a sensor senses a rear impact. The front part is movable forwardly relatively freely once the catch is released. Any subsequent rearward movement of the front part is resisted by an energy-absorbing element which converts energy to a form no longer available to bias the front part of the head-rest forwardly.

Abstract: A head-rest arrangement for a motor vehicle includes a rear part and a front part mounted on the rear part by a parallel arm linkage. A spring biases the front part forwardly. A releasable catch holds the two parts together until a sensor senses a rear impact. The front part is movable forwardly relatively freely once the catch is released. Any subsequent rearward movement of the front part is resisted by an energy-absorbing element which converts energy to a form no longer available to bias the front part of the head-rest forwardly.

Abstract: A vehicle seat includes a support structure located beneath the seat and a squab located above the support structure. A back-seat extends substantially upwardly from the rear part of the squab. A mechanism pivotally connects the rear part of the squab to the support structure to permit the rearward tilting of the back-rest while tilting upwards the squab. A kinetic energy absorbing mechanism absorbs energy when the seat executes a tilting movement. The energy absorbing mechanism is located beneath the squab and is connected to a pivotal linkage between the support structure and a forward part of the squab of the seat.