OSCILLATORY WAVE MOTOR AND SOUND GENERATION DEVICE USING OSCILLATORY WAVE MOTOR AS DRIVE SOURCE

摘要

The present invention addresses the problem of increasing the lifetimes of an oscillatory wave motor and a sound generation device using the oscillatory wave motor as a drive source, and proposes the structure and mechanism for integrally increasing the lifetimes of the oscillatory wave motor and the sound generation device using the oscillatory wave motor as the drive source. To maintain the drive performance of a drive unit, the drive unit is provided with a core sheathing structure, with the result that the drive unit is prevented from breaking and being damaged, and even if the entire drive unit is worn down, an original drive unit member serving as a core portion keeps the same drive area, so an initial drive feature is maintained. The descending order of a wear resistance of the members is the drive unit core material, a moving unit, and a drive unit sheathing material. In the oscillatory wave motor including a second drive mechanism, when causing an original operation of the oscillatory wave motor, a to-be-contacted drive area on the moving unit is relatively drifted at the same time.