CPC H02N 2/14 (2013.01) [A61M 5/007 (2013.01); A61M 5/14546 (2013.01); B05B 17/06 (2013.01); H02N 2/062 (2013.01); H02N 2/126 (2013.01); H02N 2/163 (2013.01); H02N 2/166 (2013.01); A61M 5/1452 (2013.01); A61M 2205/058 (2013.01)] | 8 Claims |
1. An ultrasonic motor unit comprising:
a single shaft; and
a first ultrasonic motor and a second ultrasonic motor respectively including a stator which includes a piezoelectric element and a rotor which comes into close contact with the stator so as not to rotate when a voltage is not applied to the first and second ultrasonic motors respectively,
wherein the rotor of the first ultrasonic motor and the rotor of the second ultrasonic motor are fixed to the single shaft so as to transmit, when one of the first ultrasonic motor and the second ultrasonic motor fixed to the single shaft is adhered, rotational force of another one of the first ultrasonic motor and the second ultrasonic motor fixed to the single shaft via the single shaft to rotate the rotor of the one of the first ultrasonic motor and the second ultrasonic motor.
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