ULTRASONIC MOTOR

摘要

An ultrasonic motor driving a piezoelectric device (3), a feed member (13) feeding the piezoelectric device (3), and a driven member (7) using an elliptical vibration synthesizing a longitudinal vibrational mode and a flexural vibrational mode as a drive force, characterized in that an extensional axis of the feed member (13) is set to an axis different from main vibrational axes of the longitudinal vibrational mode and the flexural vibrational mode.