| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration motor which never generates abnormal vibration. SOLUTION: This motor is constituted not to include natural number of vibrations of a moving body in a vibration frequency band of a vibration motor. The natural number of vibrations of the moving body is not included in the drive frequency band of the vibration motor when vibration occurs in the vibration deformation mode the same as the vibration deformation mode generated in the stator. Moreover, the natural number of vibrations is set to about 1.2 to 2.0 times the natural number of vibrations in the vibration deformation mode generated in the stator. |
