| 摘要 |
<p>The present invention relates to a pumping device for a car seat including a clutch means which receives rotating power from the outside to transmit power to a link means of a seat cushion, wherein the clutch means comprises: a clutch block which rotates by receiving rotating power from the outside; a clutch drum which accommodates the clutch block in an inner space thereof, rotates by receiving the rotating power from the clutch block, and transfers the power to the link means of the seat cushion; and a ligature which is interposed between an outer peripheral surface of the clutch block and an inner peripheral surface of the clutch drum and transfers the rotating power of the clutch block to the clutch drum. Additionally, the clutch block is provided with a protruding portion protruding in a radial direction on the outer peripheral surface thereof, and thus stress concentration at the ligature does not occur.</p> |
