| 摘要 |
<p>The present invention relates to a pumping device of a seat for a vehicle, comprising a clutch unit for transmitting power to a link unit of a seat cushion by receiving rotatory power from the outside. The clutch unit comprises a clutch block for receiving rotatory power from the outside to rotate; a clutch drum which has the clutch block inside and which is rotated by rotatory power transmitted by the clutch block to transmit power to the link unit of the seat cushion; and an engagement unit engaged with a space between the outer circumference of the clutch block and the inner circumference of the clutch drum to transmit the rotatory power of the clutch block to the clutch drum. The clutch block has a protrusion part radially protruding from the outer circumference to prevent stress concentration on the engagement unit.</p> |
