| 摘要 |
The present invention relates to a pumping device, which is a part used to adjust the height of a vehicle seat, the pumping device comprising: a support plate having a circular accommodation part longitudinally having a predetermined width; a brake cam, which forms a plurality of accommodation spaces in the circumferential direction between the brake cam and the inner circumference of the accommodation part; locking means accommodated in the respective accommodation spaces, for unlocking or locking the rotary movement of the brake cam; a control plate having, on one side thereof, control protrusions for pressing the locking means in the circumferential direction and having, on the other side thereof, a circular rim having teeth formed on the inner circumferential surface thereof; a bidirectional clutch gear engaging or disengaging from the teeth from inside the rim; a lever plate for rotating the bidirectional clutch gear; and an elastic return means for returning the lever plate. Accordingly, the present invention can provide a pumping device for a vehicle seat, which can minimize the space required for operation and can easily be operated even with a small force. |
