| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration actuator capable of obtaining a sufficient driving force.SOLUTION: In a vibration actuator, a movable shaft is moved by vibrations. The vibration actuator includes: the movable shaft 10; multiple oscillatory members 20 which are disposed around the movable shaft 10 so as to be separated in a circumferential direction; piezoelectric elements 31 respectively fixed to outer surfaces of the oscillatory members 20; and biasing members 42 which bias the oscillatory members 20 in a radial inner direction and press the oscillatory members 20 against an outer peripheral surface of the movable shaft 10. The movable shaft 10 is moved by the vibrations of the oscillatory members 20 which are caused when the piezoelectric elements 31 are energized. |
