| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration actuator capable of preventing noise from occurring, and obtaining stable vibration.SOLUTION: A first weight part 6 in a vibration actuator 1 includes an inside enlarged part 23 protruding from an end part of a solid head part 22b in a direction of a vibration axis line L, and inserted into a hollow part S1 extending along the direction of the vibration axis line L, in a first compression coil spring 21. A diameter, across the vibration axis line L as the center, of an outer peripheral surface 23a of the inside enlarged part 23 becomes smaller continuously from a base end side to a free end side. Thus, the inside enlarged part 23 has a truncated cone shape. The inside enlarged part 23 is inserted into the hollow part S1 of the first compression coil spring 21, and the mass of the first weight part 6 is increased or decreased by changing a length of the inside enlarged part 23 in the direction of the vibration axis line L, using the hollow part S1. |
