| 摘要 |
An ultrasonic actuator includes: a piezoelectric element 1 for generating a bending vibration and a stretching vibration; and a driver element 2 attached to a surface of the piezoelectric element 1 facing the direction of the bending vibration in point contact with the piezoelectric element 1 and actuated in accordance with the vibration of the piezoelectric element 1 to output driving force.
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