Vehicle seat with headrest adjustable on the backrest
First Claim
1. A vehicle seat for a vehicle occupant, said seat comprising a backrest, a headrest displaceably attached to said backrest and being movable from a normal starting position forwardly in a substantially horizontal direction into a restraint position by a headrest displacing force, a vehicle-sensitive activatable positioner generating said headrest displacing force and a flexible traction transmitting means, said traction transmitting means being coupled with said positioner and connecting said headrest and said positioner, said positioner moving said headrest in the case of a rear end collision of the vehicle from said normal starting position into said restraint position by transmitting said headrest displacing force via said traction transmitting means, and said traction transmitting means extending through said backrest.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle seat for a vehicle occupant has a backrest, a headrest arranged adjustable on the backrest and being movable from a normal starting position into a restraint position approximating the head of the vehicle occupant, a vehicle-sensitive activatable positioner and a flexible traction transmitting means connecting the headrest and the positioner. The positioner moves the headrest in the case of a rear end collision of the vehicle from the normal starting position into the restraint position by transmitting force via the traction transmitting means. The traction transmitting means extends through the backrest.
64 Citations
19 Claims
- 1. A vehicle seat for a vehicle occupant, said seat comprising a backrest, a headrest displaceably attached to said backrest and being movable from a normal starting position forwardly in a substantially horizontal direction into a restraint position by a headrest displacing force, a vehicle-sensitive activatable positioner generating said headrest displacing force and a flexible traction transmitting means, said traction transmitting means being coupled with said positioner and connecting said headrest and said positioner, said positioner moving said headrest in the case of a rear end collision of the vehicle from said normal starting position into said restraint position by transmitting said headrest displacing force via said traction transmitting means, and said traction transmitting means extending through said backrest.
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15. A vehicle seat for a vehicle occupant, said seat comprising a backrest, a headrest displaceably attached to said backrest and being movable from a normal starting position forwardly in a substantially horizontal direction into a restraint position by a headrest displacing force, a vehicle-sensitive activatable positioner generating said headrest displacing force, a flexible traction transmitting means, and a tubular bracket having hollow legs, by means of which said headrest being mounted on said backrest, said traction transmitting means being coupled with said positioner and connecting said headrest and said positioner, said positioner moving said headrest in the case of a rear end collision of the vehicle from said normal starting position into said restraint position by transmitting said headrest displacing force via said traction transmitting means, said traction transmitting means extending through said backrest, and said traction transmitting means being a Bowden cable guided through one of said legs.
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16. A vehicle seat for a vehicle occupant, said seat comprising a backrest, a headrest displaceably attached to said backrest and being movable from a normal starting position forwardly in a substantially horizontal direction into a restraint position by a headrest displacing force, a vehicle-sensitive activatable positioner generating said headrest displacing force and a flexible traction transmitting means, said traction transmitting means being coupled with said positioner and connecting said headrest and said positioner, said positioner moving said headrest in the case of a rear end collision of the vehicle from said normal starting position into said restraint position by transmitting said headrest displacing force via said traction transmitting means, said traction transmitting means extending through said backrest, wherein a retaining means is provided which maintains said headrest in said starting position, and said retaining means being one of a shear pin and a latching spring each of which being overcome on activation of said positioner.
- 17. A vehicle seat for a vehicle occupant, said seat comprising a backrest, a headrest displaceably attached to said backrest and being movable from a normal starting position forwardly in a substantially horizontal direction into a restraint position by a headrest displacing force, a vehicle-sensitive activatable positioner generating said headrest displacing force and a flexible traction transmitting means, said traction transmitting means being coupled with said positioner and connecting said headrest and said positioner, said positioner moving said headrest in the case of a rear end collision of the vehicle from said normal starting position into said restraint position by transmitting said headrest displacing force via said traction transmitting means, said traction transmitting means extending through said backrest, wherein said positioner is equipped with a piston/cylinder linear drive having a return stop, said piston/cylinder linear drive having a cylinder with a cylinder wall and a piston arranged within said cylinder, said return stop being formed by at least one roll body, said piston having a ramp surface, said roll body being carried by said ramp surface of said piston and being maintained in spring engagement with said cylinder wall, and said roll body being moved outwardly on said ramp surface upon displacement of said headrest from said restraint back to said normal starting position to be clamped between said ramp surface and said cylinder.
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19. A vehicle seat for a vehicle occupant, said seat comprising a backrest, a headrest displaceably attached to said backrest and being movable from a normal starting position forwardly in a substantially horizontal direction into a restraint position by a headrest displacing force, a vehicle-sensitive activatable positioner generating said headrest displacing force and a flexible traction transmitting means, said traction transmitting means being coupled with said positioner and connecting said headrest and said positioner, said positioner moving said headrest in the case of a rear end collision of the vehicle from said normal starting position into said restraint position by transmitting said headrest displacing force via said traction transmitting means, said traction transmitting means extending through said backrest, said cylinder having a pressure space and a pressure-relief valve, said pressure space being pressure-relievable by said pressure-relief valve so that said positioner is deactivated when contact between said head of said vehicle occupant and said headrest is sensed by measuring an increased pressure within said pressure space.
Specification