| 摘要 |
<P>PROBLEM TO BE SOLVED: To make it possible to remove a recording of an unwanted operation sound when shooting a video. <P>SOLUTION: A fixed barrel 30, an ultrasonic motor 20, provided at an outer periphery of the fixed barrel, which generates an ultrasonic vibration on an elastic body by energizing a piezo-electric element and moves a movable body, pressure-bonded to the elastic body, with an ultrasonic vibration, and a vibration sensor 40, provided at an inner peripheral side of the fixed barrel, which detects a vibration generated when driving the ultrasonic motor are provided. <P>COPYRIGHT: (C)2013,JPO&INPIT |
