POWER HEADREST APPARATUS
First Claim
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1. A power headrest apparatus comprising:
- a supporting rod supported by a seat back frame of a vehicle seat so as to be vertically movable;
a headrest part comprising a stationary part, fixedly connected to an upper end portion of the supporting rod, and a movable part, connected to the upper end portion of the supporting rod so as to be movable in forward and backward direction of the seat;
a link part comprising first and second link members, front end portions of which are connected to the movable part while rear end portions thereof are connected to the supporting rod;
a first driving part for vertically moving the supporting rod by electric power supplied from an outside; and
a second driving part for moving the movable part relative to the stationary part by the electric power supplied from the outside, wherein;
the first and second link members are arranged to intersect with each other in an X form, and are interconnected to be pivotable about a pivot shaft; and
the second driving part vertically moves one of the rear end portions of the first and second link members.
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Abstract
Disclosed herein is a power headrest apparatus capable of automatically adjusting vertical and forward-backward movement of a headrest using motors, and of sufficiently securing an amount of forward-backward movement of the headrest using a pair of link members, which are arranged to intersect with each other in an X form, while a width of the headrest in forward and backward directions thereof is maintained below a certain level.
21 Citations
9 Claims
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1. A power headrest apparatus comprising:
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a supporting rod supported by a seat back frame of a vehicle seat so as to be vertically movable; a headrest part comprising a stationary part, fixedly connected to an upper end portion of the supporting rod, and a movable part, connected to the upper end portion of the supporting rod so as to be movable in forward and backward direction of the seat; a link part comprising first and second link members, front end portions of which are connected to the movable part while rear end portions thereof are connected to the supporting rod; a first driving part for vertically moving the supporting rod by electric power supplied from an outside; and a second driving part for moving the movable part relative to the stationary part by the electric power supplied from the outside, wherein; the first and second link members are arranged to intersect with each other in an X form, and are interconnected to be pivotable about a pivot shaft; and the second driving part vertically moves one of the rear end portions of the first and second link members. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification