Backrest for a vehicle seat
First Claim
Patent Images
1. A backrest for a vehicle seat, comprising:
- a head restraint, backrest padding, and a supporting element which is intended for a back of a seat occupant and, just in the case of a rear-end collision of the vehicle, the supporting element is yieldable, at least in an upper backrest region, in such a manner that at least the upper back of the seat occupant is able to shift rearwards relative to the head restraint, wherein the supporting element is formed by a shaped cushion which is integrated in the backrest padding in the upper backrest region, is filled with a gaseous medium and with the rear-end collision can suddenly be deflated.
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Accused Products
Abstract
A backrest for a vehicle seat, having a head restraint and backrest padding, and having a supporting element which is intended for the seat occupant'"'"'s back and, is compliant, at least in the upper backrest region, in such a manner that the seat occupant'"'"'s back is able to shift rearwards relative to the head restraint in the event of a rear-end collision of the vehicle. The supporting element is formed by a shaped cushion that is integrated in the backrest padding in the upper backrest region, and filled with a gaseous medium, in particular air. In the event of a collision this supporting element can suddenly be deflated.
33 Citations
16 Claims
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1. A backrest for a vehicle seat, comprising:
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a head restraint, backrest padding, and a supporting element which is intended for a back of a seat occupant and, just in the case of a rear-end collision of the vehicle, the supporting element is yieldable, at least in an upper backrest region, in such a manner that at least the upper back of the seat occupant is able to shift rearwards relative to the head restraint, wherein the supporting element is formed by a shaped cushion which is integrated in the backrest padding in the upper backrest region, is filled with a gaseous medium and with the rear-end collision can suddenly be deflated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
wherein in order to deflate the shaped cushion, a valve is connected to the shaped cushion, and wherein an acceleration meter, sensing a rear-end collision, and a control device are provided, the control device opening the valve when a specified acceleration value is exceeded. -
8. The backrest according to claim 7, wherein the valve outlet is connected to a vacuum.
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9. The backrest according to claim 7,
wherein the valve is a multiway valve having at least three valve connections, a first connection forming a valve outlet, a second connection being connected to the shaped cushion, and a third connection being connected to a compressed-medium store, and wherein when a manual filling button is actuated, the control device transfers the valve into a valve position leading to the filling of the shaped cushion. -
10. The backrest according to claim 1, wherein a second shaped cushion is integrated in a lumbar region of the backrest padding, which shaped cushion is filled with a gaseous medium and is deflated in a defined manner in the event of the rear-end collision.
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11. The backrest according to claim 10, wherein provision is made of a multiway valve having at least three valve connections, a first connection forming a valve outlet, a second connection being connected to the shaped cushion, and a third connection being connected to the compressed-medium store, and also of a control device which is connected to an acceleration meter and to a manual filling button, is intended for the valve and switches over the valve to eliminating air from the shaped cushion, when a specified measured value of the acceleration meter is exceeded, and switches the valve over to filling the shaped cushion, when the filling button is actuated.
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12. The backrest according to claim 10, wherein the control device and the valve are combined in a control unit.
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13. The backrest according to claim 1, wherein air is used as the gaseous medium.
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14. The backrest according to claim 1, wherein the head restraint is designed as a crash-active head restraint which, in the event of rear-end collision, by moving forwards at least one part of the head restraint at least minimizes a gap present between a back of the head of the seat occupant and the front surface of the head restraint.
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15. The backrest according to claim 14, wherein the movement is brought about by way of a pneumatic device integrated in the head restraint, and the gaseous medium emerging from the shaped cushion in the event of rear-end collision is used in order to actuate the pneumatic device.
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16. A backrest according to claim 1, wherein the shaped cushion is at a front surface of the vehicle seat.
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Specification