< Topic >Although it supplies electricity to the ultrasonic vibrating component of the rotor, the contact failure due to the friction between the contact breaker points is evaded and the structure which is superior in endurance is offered.SolutionsMultiple conductive bearing bearings the mediating/helping equipment are done with the rotor and the handle side which supports that, the electrode and the high frequency power supply section Drive the ultrasonic vibrating component are jointed through this bearing bearing, electrically. 1 pair there to be an electrode, because high frequency power source is jointed via the bearing bearing insulating respectively electrically, the faulty connection problem which originates in the abrasion of the contact breaker points the former way can be cancelled.< Choice figure >Drawing 2【課題】ロータの超音波振動素子に給電するのに接点間の摩擦による接触不良を回避し耐久性に優れた構造を提供する。【解決手段】ロータとそれを支持するハンドル側との間に複数個の導電性軸受けベアリングを介装し、超音波振動素子を駆動する電極と高周波電源部をこの軸受けベアリングを介して電気的に接続する。電極は1対ありそれぞれに電気的に絶縁した軸受けベアリングを経由して高周波電源を接続するので、従来のような接点の摩滅に起因する接続不良問題を解消できる。【選択図】図2
