| 摘要 |
<p>A dental treatment device (I) for forming a screw hole for embedment of an implant material by a tool attached to said dental treatment device contains a speed-reducing unit (C) for decelerating rotation of an external electric motor and raising torque for transmitting rotation to the tool, and a clutch unit provided between the speed-reducing unit (C) and the tool. The clutch unit contains a driving side clutch (40) having a first indented surface (40') on its forward side, a tool side clutch (50) having a second indented surface (50') on its rear side, and a spring (34) for thrusting the driving side clutch (40) towards the tool side clutch (50) for axially mating the first indented surface (40') and the second indented surface (50') with each other. <MATH></p> |
