Headrest height adjustment device
First Claim
1. A headrest height adjustment device, comprising:
- a base member;
a pulley rotatably supported by the base member, the pulley being rotatable in a first direction by unwinding a first end of a rope member wound around the pulley and by winding a second end of the rope member in conjunction with sliding movement of a seat body either in a forward or rearward direction, and the pulley being rotatable in a second direction by winding the first end of the rope member wound around the pulley and unwinding the second end of the rope member in conjunction with sliding movement of the seat body;
a rotational arm rotatably supported by the base member and rotated by the pulley through a rotation transmission member; and
a conversion member engaged with the rotational arm for operating a headrest in an upward or downward direction by converting rotational movement of the rotational arm into linear movement.
1 Assignment
0 Petitions
Accused Products
Abstract
A headrest height adjustment device includes a base member fixed on a seatback of a seat body, a pulley rotatably supported by the base member, the pulley being rotatable in a first direction by unwinding a first end of a rope member wound around the pulley and winding a second end of the rope member in conjunction with sliding movement of the seat body, and the pulley being rotatable in a second direction by winding the first end of a rope member and unwinding the second end of the rope member in conjunction with sliding movement, a rotational arm rotatably supported by the base member and rotated by the pulley by a rotation transmission member, and a conversion member engaged with the rotational arm for operating a headrest in an upward or downward direction by converting rotational movement of the rotational arm into linear movement.
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Citations
20 Claims
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1. A headrest height adjustment device, comprising:
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a base member; a pulley rotatably supported by the base member, the pulley being rotatable in a first direction by unwinding a first end of a rope member wound around the pulley and by winding a second end of the rope member in conjunction with sliding movement of a seat body either in a forward or rearward direction, and the pulley being rotatable in a second direction by winding the first end of the rope member wound around the pulley and unwinding the second end of the rope member in conjunction with sliding movement of the seat body; a rotational arm rotatably supported by the base member and rotated by the pulley through a rotation transmission member; and a conversion member engaged with the rotational arm for operating a headrest in an upward or downward direction by converting rotational movement of the rotational arm into linear movement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A vehicle seat comprising:
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a seat body comprising a seatback frame and a seat cushion frame; and a headrest adjustment device mounted on the seat body, the headrest adjustment device comprising; a base member fixed at the seatback frame; a pulley rotatably supported by the base member, the pulley being rotatable in a first direction by unwinding a first end of a rope member wound around the pulley and winding a second end of the rope member around the pulley in conjunction with sliding movement of the seat body either in a forward or rearward direction, and the pulley being rotatable in a second direction by winding the first end of the rope member around the pulley and unwinding the second end of the rope member from the pulley in conjunction with sliding movement of the seat body; a rotational arm rotatably supported by the base member and rotated by the pulley through a rotation transmission member; and a conversion member engaged with the rotational arm for operating a headrest in an upward or downward direction by converting rotational movement of the rotational arm into linear movement. - View Dependent Claims (19, 20)
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Specification