| 摘要 |
A vibration driven motor or actuator has a piezoelectric element, arranged in a vibrating member, for generating a vibration in a first direction, and another piezoelectric element, arranged in the vibrating member, for generating a vibration in a second direction different from the first direction. In the motor or actuator, the vibrating member has a recess portion shaved by, e.g., a laser, or a portion added with a mass, so that the natural frequencies of a given vibration mode of the vibrations in the first and second directions coincide or substantially coincide with each other.
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