PROBLEM TO BE SOLVED: To provide a dental vibration applied device, an ultrasonic washing device, an ultrasonic dental calculus remover, a vibratory cutter, a vibratory surface treatment device, a material stirring device and a material condensing device coping with commercial different power supply voltages.SOLUTION: A switching element is provided in the interior of a d.c. power supply, one or both of a voltage detector and a current detector are provided in a current passage from the d.c. power supply to the load side, and a control part on-off controls the switching element at high speed so that the detected voltage, the detected current or the combined value of the detected voltage and the detected current is constant. The high-speed on/off control for the switching element is conducted so that for the commercial a.c. power input including the range at least from 90V to 264V, the detected voltage, the detected current or the combined value of the detected voltage and the detected current reaches a predetermined value determined by an operators operation or the control part.COPYRIGHT: (C)2008,JPO&INPIT【課題】異なる商用電源電圧に対応する歯科用の振動応用装置、超音波洗浄装置、超音波歯石除去装置、振動切削装置、振動表面処理装置、材料攪拌装置、材料凝縮装置を提供する。【解決手段】直流電源の内部にスイッチ素子を、直流電源より負荷側への電流経路に電圧検出器・電流検出器いずれかひとつ以上を設け、制御部がこの検出電圧または検出電流または検出電圧と検出電流の結合値のいずれかが一定になる様にこのスイッチ素子を高速ON/OFF制御する。ON/OFF制御が、少なくとも90Vから264Vの範囲を含む商用交流電力入力に対し、検出電圧または検出電流または検出電圧と検出電流の結合値のいずれかが、操作者の操作または制御部により定まる所定の値になる様にこのスイッチ素子を高速ON/OFF制御する。【選択図】図6
