Adjustable headrest for a vehicle seat
First Claim
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1. An adjustable headrest assembly for a vehicle seat having a seat cushion portion and a seat back portion, the headrest assembly comprising:
- a fixed headrest portion secured to the seat back portion;
a movable headrest portion mounted on the fixed headrest portion at a location adjacent the head of a vehicle occupant;
the mounting for the movable headrest portion comprising arcuate, telescoping members, one telescoping member forming a part of the movable headrest portion and the other telescoping member forming a part of the fixed headrest portion;
at least one spring between the movable and fixed headrest portions for applying a spring force for adjusting the movable headrest portion in a forward direction relative to the fixed headrest portion;
at least one releasable locking element securing the movable headrest portions together against a biasing spring force; and
the locking element being released in response to an inertia-force of a vehicle rear impact.
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Abstract
An adjustable headrest assembly for a vehicle seat is disclosed. The assembly has a portion fixed to a seat frame and an adjustable portion that moves relative to the fixed portion on a circular arcuate path under spring forces. Relative movement is triggered by a vehicle rear crash event.
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Citations
13 Claims
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1. An adjustable headrest assembly for a vehicle seat having a seat cushion portion and a seat back portion, the headrest assembly comprising:
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a fixed headrest portion secured to the seat back portion; a movable headrest portion mounted on the fixed headrest portion at a location adjacent the head of a vehicle occupant; the mounting for the movable headrest portion comprising arcuate, telescoping members, one telescoping member forming a part of the movable headrest portion and the other telescoping member forming a part of the fixed headrest portion; at least one spring between the movable and fixed headrest portions for applying a spring force for adjusting the movable headrest portion in a forward direction relative to the fixed headrest portion; at least one releasable locking element securing the movable headrest portions together against a biasing spring force; and the locking element being released in response to an inertia-force of a vehicle rear impact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An adjustable headrest assembly for a vehicle having a vehicle seat with a seat cushion portion and a seat back portion;
- the headrest assembly comprising;
a fixed headrest portion secured to the seat back portion; a movable headrest portion mounted on the fixed headrest portion at a location adjacent the head of a vehicle occupant; the mounting for the movable headrest portion comprising arcuate, telescoping members, one telescoping member forming a part of the movable headrest portion and the other telescoping member forming a part of the fixed headrest portion; at least one spring between the movable and fixed headrest portion for applying a spring force for adjusting the movable headrest portion in a forward direction relative to the fixed headrest portion; at least one releasable locking element securing the movable headrest portions together against a biasing spring force; an inertia impact sensor located at the rear of the vehicle; and an electric actuator electrically connected to the sensor and forming a part of the headrest assembly for releasing the locking elements to trigger relative sliding movement of the telescoping members at the instant of a vehicle crash event. - View Dependent Claims (10, 11)
- the headrest assembly comprising;
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12. An adjustable headrest assembly for a vehicle seat having a seat cushion portion and a seat back portion, the headrest assembly comprising:
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a fixed headrest portion secured to the seat back portion; a movable headrest portion mounted on the fixed headrest portion at a location adjacent the head of a vehicle occupant; the mounting for the movable headrest portion comprising arcuate, telescoping members, one telescoping member forming a part of the movable headrest portion and the other telescoping member forming a part of the fixed headrest portion; at least one spring between the movable and fixed headrest portions for applying a spring force for adjusting the movable headrest portion in a forward direction relative to the fixed headrest portion; at least one releasable locking element securing the movable headrest portions together against a biasing spring force; the locking element being released in response to an inertia-force of a vehicle rear impact; wherein multiple pairs of telescoping members define a mount for the movable headrest portion; the spring being disposed between telescoping of at least one pair of telescoping members; wherein the fixed headrest portion has at least one friction surface, the at least one locking element being carried by the fixed headrest portion and having a cam surface engagable with the friction surface under a biasing force of a locking element spring; and a plate disposed adjacent the at least one locking element, the plate being secured to the movable portion of the headrest assembly and locked to the at least one locking element under the force of the locking element spring. - View Dependent Claims (13)
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Specification