| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration actuator which suppresses the generation of friction sound and facilitates the thinning and weight saving with a simple structure.SOLUTION: A pair of leaf springs 10 assuming the same shape are arranged in a housing 4, and a balance weight 8 and a magnet 7 can be vibrated while being floated in the housing 4 by each leaf spring 10. The pair of leaf springs 10 are arranged opposite to each other while centering the balance weight 8 in the extension direction of vibration center axial line L, and have mirror surface symmetrical relation with a flat surface vertical to the vibration center axial line L as the boundary. Therein, while each leaf spring 10 is attached to the balance weight 8, a width direction of each leaf spring 10 is caused to conform with a thickness direction of the balance weight 8. Each leaf spring 10 has a first spring part A and a second spring part B which assume a mirror surface symmetry with a symmetry plane passing through the vibration center axial line L as the boundary. The first spring A assuming a sigmoid shape comprises a first seating piece 11A fixed to a lateral wall 3a of a cover part 3, a second seating piece 12A brought into contact with a circumferential surface 8c of the balance weight 8 and a spring piece 13A extended between the first seating piece 11A and the second seating piece 12A. |
