| 摘要 |
PURPOSE:To enable linear motion and rolling motion, to facilitate manufacture of vibrator, to reduce manufacturing cost and to improve reliability by arranging protrusions on a part, in the circumferential direction, of an annular vibrator and bringing a moving body into pressure contact with the protrusions. CONSTITUTION:An elastic body 1 constitutes a vibrator 3 together with a piezoelectric body 2, and one or more protrusions 8 are arranged on a part of an annular vibrator 3 in the circumferential direction. A linear moving body 9 is brought into pressure contact with the protrusions 8 by pressing the upper face (opposite from the contact face with the protrusions 8) of the moving body 9 by means of a linear guide and the like. Consequently, the moving body 9 can perform linear reciprocal motion. Furthermore, since the protrusions 8, requiring high precision in the profile and the dimensions, are not required to be arranged over the entire circumferential range, machining of the vibrator is simplified and the yield thereof is improved. |
