Automotive seat—seat back with integrated protective device and process to prevent injuries caused by accident
First Claim
1. A seat back for an automotive seat comprising:
- a bottom seat-back part, connectable to a seat part;
a top seat-back part connected to said bottom seat-back part for pivotal movement in an angular range relative to said bottom seat-back part out of a position of standard use, around an axis in said seat back that runs perpendicular to a longitudinal axis of the vehicle, and along a pivot direction pointing in the direction of vehicle travel;
a torque generating means for generating a torque operating on said top seat-back part in said pivot direction, regardless whether the automotive seat is occupied; and
detecting means for detecting a rear-end impact, which is actively linked with said torque-generating means in such a way, that said torque-generating means is activated in the event of a rear-end impact and the swinging movement is started.
1 Assignment
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Accused Products
Abstract
A seat back for an automotive seat with an integrated protective device and a process for preventing injuries to a seat occupant caused by an accident in the event of a rear-end impact. The seat back features a bottom seat-back part and a top seat-back part that, by means of a torque, pivots around an axis in the seat back that is perpendicular to the longitudinal axis of the vehicle, out of a position of standard use and into a safety position. To improve the efficiency of such a seat back, it is proposed that the protective device features a device that generates the torque regardless whether the automotive seat is occupied, and means for detecting a rear-end impact, which are actively linked with the torque-generating device in such a way that the device is activated in the event of a rear-end impact and the swinging movement is started.
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Citations
26 Claims
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1. A seat back for an automotive seat comprising:
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a bottom seat-back part, connectable to a seat part;
a top seat-back part connected to said bottom seat-back part for pivotal movement in an angular range relative to said bottom seat-back part out of a position of standard use, around an axis in said seat back that runs perpendicular to a longitudinal axis of the vehicle, and along a pivot direction pointing in the direction of vehicle travel;
a torque generating means for generating a torque operating on said top seat-back part in said pivot direction, regardless whether the automotive seat is occupied; and
detecting means for detecting a rear-end impact, which is actively linked with said torque-generating means in such a way, that said torque-generating means is activated in the event of a rear-end impact and the swinging movement is started. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A seat back for an automotive seat comprising:
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a bottom seat-back part, connectable to a seat part;
a top seat-back part connected to said bottom seat-back part for pivotal movement in an angular range relative to said bottom seat-back part out of a position of standard use, around an axis in said seat back that runs perpendicular to a longitudinal axis of the vehicle, and along a pivot direction pointing in the direction of vehicle travel;
a torque generating means for generating a torque operating on said top seat-back part in said pivot direction, regardless whether the automotive seat is occupied, wherein said torque generating means includes a prestressed spring element;
detecting means for detecting a rear-end impact, which is actively linked with said torque-generating means in such a way, that said torque-generating means is activated in the event of a rear-end impact and the swinging movement is started; and
wherein said spring element features a descending characteristic curve that generates a high starting force for generating a strong acceleration, but only a very small final force.
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16. A seat back for an automotive seat comprising:
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a bottom seat-back part, connectable to a seat part;
a top seat-back part connected to said bottom seat-back part for pivotal movement in an angular range relative to said bottom seat-back part out of a position of standard use, around an axis in said seat back that runs perpendicular to a longitudinal axis of the vehicle, and along a pivot direction pointing in the direction of vehicle travel;
a torque generating means for generating a torque operating on said top seat-back part in said pivot direction, regardless whether the automotive seat is occupied, wherein said torque generating means includes a prestressed spring element;
detecting means for detecting a rear-end impact, which is actively linked with said torque-generating means in such a way, that said torque-generating means is activated in the event of a rear-end impact and the swinging movement is started; and
wherein said spring element is formed by a torsion spring arranged around said swiveling axis.
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17. A seat back for an automotive seat comprising:
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a bottom seat-back part, connectable to a seat part;
a top seat-back part connected to said bottom seat-back part for pivotal movement in an angular range relative to said bottom seat-back part out of a position of standard use, around an axis in said seat back that runs perpendicular to a longitudinal axis of the vehicle, and along a pivot direction pointing in the direction of vehicle travel;
a torque generating means for generating a torque operating on said top seat-back part in said pivot direction, regardless whether the automotive seat is occupied, wherein said torque generating means includes a prestressed spring element;
detecting means for detecting a rear-end impact, which is actively linked with said torque-generating means in such a way, that said torque-generating means is activated in the event of a rear-end impact and the swinging movement is started; and
wherein said spring element is formed by a pressure spring that is fastened in said bottom seat-back part and acts upon said top seat-back part.
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- 18. A process for preventing injuries to a seat occupant caused by accidents in case of a rear-end impact, by means of a protective device integrated into the seat back of an automotive seat with a bottom seat-back part connected with a seat part and with a top seat-back part, whereby in the case of a rear-end impact said top seat-back part pivots in an angular range relative to said bottom seat-back part out of a position of standard use around an axis in said seat back that runs perpendicular to the longitudinal axis of the vehicle and into a pivot direction pointing in the direction of travel into a safety position by means of a torque operating in said pivot direction, wherein said top seat-back part is accelerated in said pivot direction at a considerable rate, as it is a more moderate or empirically determined more average acceleration rate that said automotive seat experiences from the collision, and wherein the protective device operates regardless of whether said seat is occupied.
Specification