| 摘要 |
An ultrasonic motor is configured as follows. Namely, the ultrasonic motor includes an oscillator which is configured to has a shape that conforms a resonant frequency of longitudinal oscillation exited in the oscillator to a resonant frequency of torsional oscillation, a driven body that comes into contact with an elliptic oscillation generation surface of the oscillator and is driven by the elliptic oscillation, and a pressing mechanism unit that welds the elliptic oscillation generation surface of the oscillator to the driven body by pressing, wherein the oscillator has a first polarization unit that is formed in a region associated with a node portion of the longitudinal oscillation and configured to excite the longitudinal oscillation in the oscillator, and a second polarization unit that is formed in a region associated with a ventral portion of the torsional oscillation and configured to excite the torsional oscillation in the oscillator.
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