The present invention discloses an electric handpiece which can be manually switched and used. The handpiece according to the present invention includes a body having an electric motor for rotating the shaft, and a cartridge mounted on the shaft. A handpiece according to the present invention includes a slide button, a locking mechanism, and a switching mechanism. The slide button is mounted on the outer surface of the body so as to slide between a motorized mode position for driving the electric motor and a manual mode position for restricting the drive of the electric motor. The locking mechanism releases the constraint of the shaft at the power mode position of the slide button and restrains the rotation of the shaft at the manual mode position of the slide button. The switching mechanism includes a printed circuit board mounted on the body, a pair of fixed contacts spaced apart from each other on the printed circuit board and connected to supply electric power to the electric motor, A pair of fixed contacts spaced apart from a pair of fixed contacts to cut off electric power supplied to the electric motor at the manual mode position of the slide button and to be in contact with a pair of fixed contacts to supply electric power to the electric motor at the power-And a movable contact for opening the contact. According to the present invention, the operation of the electric motor and the rotation of the shaft are interrupted by the operation of the button, so that the electric type can be switched manually and easily, and the electric power supplied to the electric motor in the manual mode is cut off, There is a useful effect that can be done.본 발명은 수동식으로 간편하게 전환하여 사용할 수 있는 전동식 핸드피스를 개시한다. 본 발명에 따른 핸드피스는 샤프트를 회전시키기 위한 전기모터가 장착되어 있는 몸체와, 샤프트에 장착되어 있는 카트리지를 구비한다. 본 발명에 따른 핸드피스는 슬라이드 버튼, 로킹 메커니즘과 스위칭 메커니즘을 구비한다. 슬라이드 버튼은 전기모터의 구동을 위한 전동모드위치와 전기모터의 구동을 구속하기 위한 수동모드위치 사이를 슬라이딩할 수 있도록 몸체의 외면에 장착되어 있다. 로킹 메커니즘은 슬라이드 버튼의 전동모드위치에서 샤프트의 구속을 해제하고, 슬라이드 버튼의 수동모드위치에서 샤프트의 회전을 구
