| 摘要 |
PROBLEM TO BE SOLVED: To realize the vibrator capable of controlling the frequency and amplitude of vibration independently and capable of executing vibration modes such as impact vibration as well as simple vibration. SOLUTION: A vibration part 17 having the yokes 13 and 14 constituting the magnetic circuit with a coil 8 is provided, a rectangular driving current of a constant peak value is repeatedly applied on the coil 8 to reciprocatively vibrate the vibration part 17, the amplitude of the vibration part 17 is made correspondent to the applying time of the rectangular driving current, and the repeating frequency of the rectangular driving current and the applying time of the current are made changeable independently of each other. |
