Patent ID: 9505320
Filing Date: 2016-11-29
CPC Classification: B60N

Claim Text:
1. An apparatus for adjusting a seat height, comprising: a fixed member fixedly installed at a seat cushion, the fixed member including a plurality of first stoppers at predetermined radial positions from a center of an axial direction; an input member rotatably installed on an axis concentric with the fixed member, the input member having hook parts formed to protrude from an inner circumferential surface of the input member at radial positions toward a center of the input member facing the first stoppers; an output member rotatably and concentrically installed with respect to the input member, the output member having a friction flange part formed to protrude along a circumferential direction at a predetermined radial position, the friction flange part having an outer circumferential surface facing the inner circumferential surface of the input member; and a frictional rotation means rotatably installed between the inner circumferential surface of the input member and the outer circumferential surface of the friction flange part to be flexibly rotated along the circumferential direction, wherein the frictional rotation means is engaged with the hook parts upon rotating of the input member and is rotated in a state of being press-fitted in the friction flange part so that the output member is rotated with the input member in a state of being prevented from relative rotation with the input member, and the frictional rotation means is released from the hook parts upon return rotation of the input member and is rotated in a state of being released from the friction flange part so that the input member is relatively rotated with respect to the output member; wherein a center portion of the input member includes rotating parts extending in a radial direction, and wherein a center portion of the fixed member includes second stoppers disposed at predetermined radial positions from the center of the axial direction of the fixed member, each of the second stoppers being disposed at a rotating path of the rotating parts so as to limit a rotation angle of the rotating parts.