| 摘要 |
PROBLEM TO BE SOLVED: To drive the first and second driven members of different purposes only by switching the forward and reverse directions of the oscillator wave of an ultrasonic motor. SOLUTION: The stator 230 of an ultrasonic motor is capable of switching the direction of an oscillator wave by ultrasonic vibration to the first rotational direction or the second rotational direction which is opposite to it. The first rotor 211, which drives a focus adjusting member 111, engages with it for rotation only in the first rotation direction of the stator oscillator wave. The second rotor, which drives an iris diaphragm mechanism 131, engages with it for rotation only in the second rotation direction of stator oscillator wave. |
