Headrest height adjustment device
First Claim
1. A headrest height adjustment device, comprising:
- 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 by winding a second end of the rope member 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 a 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 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A headrest height adjustment device includes a base member fixed on a seatback 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.
22 Citations
17 Claims
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1. A headrest height adjustment device, comprising:
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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 by winding a second end of the rope member 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 a 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 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification