Patent ID: 8049972

Claim:
A lens actuator comprising: a movable unit, the movable unit comprising a hollow body and a first guiding member formed on the hollow body, the first guiding member being ring-shaped, and vertically protruding from a top surface of a top end of the hollow body; a fixed unit, the fixed unit comprising a hollow main body and a plate body disposed on the top end of the hollow main body, the hollow main body and the plate body cooperatively defining a receiving cavity for receiving the movable unit therein, the plate body facing the movable unit, the plate body comprising a through hole defined in the center of the plate body for allowing light to pass therethrough, and at least one second guiding member formed on the plate body, the at least one second guiding member being coupled to the first guiding member for constraining the movable unit to move along a central axis of the through hole.