| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging apparatus assembled in a cellular phone or a personal digital assistant in which a lens is driven by an actuator constituted of a wire made of shape memory alloy, and finished to be compact by effectively using space by crossing the optical axis direction of the lens with the laying direction of the wire made of shape memory alloy. SOLUTION: A cam ring 12 is rotatably fit in an annular recessed part 11b on the periphery of the aperture part 11a of a base 11, and a lens frame 14 is held to move only in the optical axis direction. The wire 21 made of shape memory alloy is laid between the locking part 31d of a driving lever 31 and pins 11f and 11g, and an actuation end 31a turns the cam ring 12 clockwise when it is turned counterclockwise by the contraction by the heating of the wire 21. The lens frame is extended in the optical axis direction (front direction in Figure) by a cam mechanism between the cam ring and the lens frame and set at a close-range photographing position. The lens frame 14 is set at an ordinary photographing position (initial position) by the stop of the heating of the wire 21. COPYRIGHT: (C)2006,JPO&NCIPI
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