Patent ID: 7480109

Claim:
A piezoelectrically driven optical lens module, comprising: a lens body comprising at least an enclosed hollow structure having a light aperture formed therein for external communication, a lens barrel positioned in the enclosed hollow structure and axially moveable along the axis of the light aperture, and a lens element fixed to the lens barrel and corresponding to the axis of the light aperture; a guiding rod fixed to the enclosed hollow structure and adjacent to an outer side of the lens barrel, the guiding rod having a frictional surface parallel to the axis of the light aperture; a piezoelectric element fixed to the outer side of the lens barrel and being in contact with the frictional surface of the guiding rod, so as to drive the lens barrel to move linearly along the guiding rod; and an elastic element disposed by straddling across the guiding rod and fixed to the outer side of the lens barrel, so as to provide the piezoelectric element with pre-load for being in contact with the frictional surface of the guiding rod.