Vehicle seat
First Claim
Patent Images
1. A vehicle seat, comprising:
- a squab;
a backrest carrying a headrest, the headrest being provided with a mechanism to move the headrest forwardly in the event of a rear impact;
a locking mechanism carried by the seat and operative to lock the headrest to prevent forward movement of the headrest in response to a predetermined signal; and
a rear impact sensor configured to sense the rear impact and generate the predetermined signal upon detecting that the rear impact exceeds a predetermined severity.
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Accused Products
Abstract
A vehicle seat 1 comprises a squab (2) and a backrest (3). The headrest (4) is carried by the backrest. The headrest 4 is provided with a mechanism (7) to move the headrest forwardly in the event that an impact should occur. A locking mechanism (9) is provided to lock the headrest to prevent forward movement of the headrest in response to a predetermined signal. The signal may be generated in response to a rear impact in excess of a predetermined severity.
44 Citations
19 Claims
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1. A vehicle seat, comprising:
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a squab; a backrest carrying a headrest, the headrest being provided with a mechanism to move the headrest forwardly in the event of a rear impact; a locking mechanism carried by the seat and operative to lock the headrest to prevent forward movement of the headrest in response to a predetermined signal; and a rear impact sensor configured to sense the rear impact and generate the predetermined signal upon detecting that the rear impact exceeds a predetermined severity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A vehicle seat comprising:
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a squab; a backrest; a headrest carried by the backrest, the headrest provided with a mechanism to move the headrest forwardly in the event of a rear impact; a locking element associated with the headrest and operative to rotate with the headrest as the headrest moves forwardly, the locking element defining a locking groove; the mechanism including a locking member moveable, by a pyrotechnic unit in response to a predetermined signal, from an initial position to a locking position, the locking member engaging the groove when in the locking position to lock the locking element and to prevent forward movement of the headrest, the predetermined signal being generated from an output from a head sensor, the predetermined signal being generated by the head sensor when a head of a seat occupant is proximate the headrest; and a rear impact sensor configured to generate the predetermined signal upon detecting that the rear impact exceeds a predetermined severity.
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18. A seat for a vehicle comprising:
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a headrest connected to the seat through a support, the support being normally moveable from a first position to a second position; a pressure plate coupled to the support to pivot the support from the first position to the second position and forwardly advance the headrest; a locking mechanism carried by the seat and operative to prevent movement of the support to the second position in response to a locking signal; and a first sensor configured to sense a rear impact to the vehicle and generate the locking signal upon detecting that the rear impact exceeds a predetermined severity, whereby the locking mechanism is normally unlocked to permit forward movement of the headrest and locked when the rear impact exceeds the predetermined severity. - View Dependent Claims (19)
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Specification