Patent ID: 7226124
Filing Date: 2007-06-05
Classification: B60N

Abstract:
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.