| 摘要 |
<p>The hand piece has a hollow shaft (6) associated to a rotating unit and mounted with an elastic forceps (20) to tighten a shank of a removable tool. A loosening sleeve (19) and a pusher (22) are placed in the rear end of the shaft. The forceps has jaws directed towards the front end of the shaft and longitudinally connected to the pusher to permit an operator to displace the forceps in the direction of the front end to be supported against the sleeve. A spring wire (28) opposes an initial resistance at a displacement of the forceps and the pusher from a service position towards the front end.</p> |
