| 摘要 |
PURPOSE:To improve an output with a simple structure by providing an irregular dynamic rigid part for regulation at an elastic element. CONSTITUTION:An elastic element 1 of a vibration wave motor is formed in an annular shape, and a plurality of piezoelectric elements 2 are secured to its one end face. Grooves (a) for preventing generation of a traveling wave in an unnecessary mode except driving 7 waves and preventing a ringing vibration at the other end face side of the element 1. In order to bring the intrinsic vibrating frequency of both standing waves in a driving vibration mode into coincidence, grooves (b) are formed at every other one wavelength at the antinode of the node of higher intrinsic vibrating frequency in addition to the grooves (a). As a result, a ringing vibration is prevented to improve its efficiency. |
