The present disclosure includes a handpiece handpiece shaft which can be attached or mounted to the flange, a tool fitting provided on the handpiece or the handpiece within the shaft, the tool in the axial direction in the tool fitting in order to transmit torque to the tool is fixed, the tool fixture for selectively receiving a surgical tool that may be rotatably supported within or handpiece shaft is rotatably supported within the handpiece shaft a surgical torque transmission device which comprises a. According to the present invention, the tool fixture, including, inter alia the following components.
- At least one entrainment shaft having an at least partially formed in a sleeve-like, the tip end side torque transfer area and axial locking region for the base end side insertion region as well as tools for torsion rod,
- Entrainment is the instrument shaft state and preferably capable of moving a closure sleeve which surrounds a state of being freely rotatable, the tip side, which acts in the axial direction locking area of ​​entrainment shaft to lock and release the tool in the axial direction and the cut-off portion, the tool fixture for transmitting torque and axial force to restrain the torsion rod, and the proximal end side restraining portion which acts on the insertion area of ​​the entrainment shaft in order to release the tool fixture from the torsion rod closure sleeve having a door.
.The 11