| 摘要 |
PURPOSE: A lumbar support device for a vehicle is provided to regulate the fine support degree of a lumbar supporting plate by an eccentric cam having a locking device consisted of a ratchet wheel and a click. CONSTITUTION: A lumbar support device for a vehicle is composed of a wire(11) having a lumbar supporting plate(12), extended to the front middle of a seat back frame, installed to a side bracket being formed at both sides of the seat back frame, and extended and installed interferingly to one side of a circular eccentric cam(13). The cam is coupled with a camshaft(15) being integrally formed with an operation lever(14), protrudes the lumbar supporting plate forward, and gradually regulates a support degree by a locking device equipped at one side.
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