PIEZOELECTRIC VIBRATOR FOR ULTRASONIC WAVE MOTOR, PRODUCTION METHOD THEREOF, METHOD OF MOUNTING PIEZOELECTRIC VIBRATOR AND ULTRASONIC WAVE MOTOR

摘要

A piezoelectric vibrator for an ultrasonic wave motor that generates longitudinal and flexural vibrations to drive a moving element. The piezoelectricoscillation vibrator is connected through an elastic member with a fixture or a member having coupling means for connection with the fixture. Such a piezoelectric vibrator can operate highly efficiently the ultrasonic wave motor without lowering resonance characteristics of the piezoelectric vibrator. Assembly of the piezoelectric vibrator into the ultrasonic wave motor can be made more easily and more reliably than in the prior art apparatuses, and can drastically improve safety and reliability during the motor operation. The ultrasonic wave motor according to the present invention is a standing-wave type ultrasonic wave motor. The piezoelectric vibrator includes a wear-resistant member disposed near the end portion of the surface opposing a driving surface in a driving direction, and is coupled with a magnet for pressing the piezoelectric oscillator to the driving surface made of a magnetic substance by a coupling member. The magnet is out of contact with the driving surface. Such an ultrasonic wave motor can simplify the pressurization mechanism, can reduce the size of the motor and moreover, has high driving efficiency.