| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration actuator simplifying a structure that supplies a lubricant to a contact part between a rotor and a vibrator.SOLUTION: A vibration actuator 101 includes: a roller 1; a vibrator 2 having a first contact surface 2a1 and a second contact surface 2b1 that contact with the roller 1; a piezoelectric element 3 vibrating the vibrator 2; a preload member 8 pressurizing the vibrator 2 with the roller 1; and a lubrication member 10 provided near the first contact surface 2a1 and the second contact surface 2b1 of the vibrator 2 so as to contact with the roller 1. The lubrication member 10 holds a lubricant, and the roller 1 has cylindrical surfaces 1aa and 1ba that respectively contact with the first contact surface 2a1 and the second contact surface 2b1. Each cylindrical surface has a recessed part V. |
