Vibration driven motor or actuator

Details Vibration driven motor or actuator Vibration driven motor or actuator

1993-10-21

1999-11-16

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, 310312, 318116, H01L 4108

Patent

active

059863854

ABSTRACT:
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 which shaved e.g., by 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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