| 摘要 |
PURPOSE:To effectively utilize a piezoelectric vibrator which solely vibrates by providing an electrode lacking part so as to partly suppress the vibration displacing amount of a cantilever piezoelectric vibrator in the lengthwise direction and differentiating the areas of the electrodes from each other. CONSTITUTION:A rectangular piezoelectric vibrator 3 is supported by a cantilever beam, and electrodes 1, 2 are formed at both side surfaces. An electrode lacking part 4 is formed at the electrode 1, and the area of the electrode 1 is reduced to be smaller than that of the electrode 2. The electrodes 1, 2 of the vibrator 3 are connected to AC voltage applying means 7, and a rotor 5 is rotated in a displacement based on the vibrating trace of the vibrator 3. |
