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US07646137B2 Actuator and its control method and lens device 失效
执行器及其控制方法及镜头装置

Actuator and its control method and lens device
摘要:
An actuator which drives a lens frame in an optical axis direction is constructed by piezoelectric elements, driving members, and a pressing spring. The piezoelectric elements are placed at opposite sides with a driven plate therebetween, and the driving members are fixed to the respective piezoelectric elements. The driving members are pressed against the driven plate from both sides by the pressing spring.
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