| 摘要 |
<p>In the present invention, an electrode (2,3) in both end portions of a piezoelectric vibrator (1) is respectively divided in two (2a,2b,3a,3b), alternative current voltage is supplied to each of electrodes of the both end portions, whereby reversible circumferential progressive wave arises on the both end portions or side portion of a state consisting of the piezoelectric vibrator (1). A member to be driven is composed on each of the both end portions or the side portion of the stator (4).</p> |
