Patent ID: 7522351
Filing Date: 2009-04-21
Classification: G02B,G03B

Abstract:
1. A lens driving device comprising: a lens receiving part with a lens disposed therein, the lens receiving part having first and second extension parts formed at opposed sides in a predetermined interval from each other; an actuator having a body between the first and second extension parts, the body having first and second output members contacting the first and second extension parts of the lens receiving part at opposed ends thereof, thereby expanding, contracting and bending when power is applied, whereby the actuator provides power necessary for driving the lens receiving part; a preload member provided above the actuator, the preload member compressing the first and second extension parts against the actuator body to maintain a status of pressed contact between the first and second extension parts and the first and second output members; and a guide part for guiding the movement of the lens receiving part in an optical axis direction, wherein the preload member comprises a horizontal plate disposed above the actuator body, the horizontal plate having free elastic ends at opposed ends thereof bent perpendicular to the horizontal plate, the free elastic ends contacting tips of the first and second output members, respectively.