Patent ID: 8000044

Claim:
A lens holder driving device comprising: a lens holder including a cylindrical body portion for holding a lens, placed along an optical axis and, protrusion portions which are placed at opposite end portions of the body portion along the optical axis and are protruded in a direction intersecting with the optical axis; a planary-driven actuator including a plurality of driving arm portions having respective lens holder support points which come into contact with an outer surface of the body portion of the lens holder at a plurality of opposing positions for holding the lens holder, and having respective contact portions at free-end sides thereof for coming into contact with the protrusion portion at the end portion positioned at a side of one direction along the optical axis and then moving the lens holder in the one direction along the optical axis; and a lens-holder restoration member for moving the lens holder in a direction opposite from the one direction along the optical axis of the lens holder in the planary-driven actuator and then restoring the lens holder to a position before being moved; wherein the protrusion portions at the opposite end portions of the lens holder are held along the optical axis of the lens holder by the free-end side contact portions of the driving arm portions of the planary-driven actuator and by the lens-holder restoration member, so that the lens holder is restricted in position along the optical axis, while the outer surface of the body portion of the lens holder is restricted in position in a plane intersecting with the direction of the optical axis by the lens holder support points of the respective driving arm portions of the planary-driven actuator, and further, the driving arm portions are bent through application of a voltage to the planary-driven actuator while the free-end side contact portions of the driving arm portions of the planary-driven actuator are contacted with the protrusion portion of the lens holder so that the lens holder is moved in the one direction along the optical axis.