Cantilever-shaped ultrasonic elliptical vibrator and ultrasonic motor using said vibrator

Abstract

Abstract PURPOSE:To turn a rotor smoothly by combining a torsional vibrating connector having structure, in which a beam is placed in the direction oblique to the central axis of vibrations, and a piezoelectric thickness vibrator and unifying the connector and the vibrator on a bending diaphragm. CONSTITUTION:Terminal boards to which lead wires 4, 5 are fitted are superposed on piezoelectirc thickness vibrators 31, 32 while positive electrodes are mutually faced oppositely, and discoid washers 2, 6 made of aluminum are stacked on both sides of the piezoelectric thickness vibrators 31, 32. A torsional connector 1 formed by the quality of a material having a low ultrasonic absorption factor is superposed on the discoid washer 2 side, thus constituting a cantilever-shaped ultrasonic elliptical vibrator. A conical indentation section 13 is recessed at the central section of a beam 11 for the torsional connector 1, and the beam 11 is parted into two sections. The vibrator is used as a stator, and a rotor with a conical roller 7 is contact-bonded, thus organizing an ultrasonic motor.

Inventors

• 👤 Akio Kumada
• 👤 熊田　明生

Bibliographic Details