| 主权项 |
1. A coupling device for transferring a driving motion from a vibration transferring handpiece to a medical, in particular dental, tool, comprising:
a first coupling element, which is provided on the handpiece, and a second coupling element, which is provided on the tool, wherein one of the first and second coupling elements is designed as a coupling recess and the other of the first and second coupling elements is designed as a coupling protrusion that can be inserted into the coupling recess, wherein the coupling protrusion and the coupling recess each have a first section for releasable connection of the first and second coupling elements and a second section for positioning the first and second coupling elements along their joint longitudinal axis, wherein the second section on the coupling protrusion and on the coupling recess is formed such that the first and second coupling elements can be positioned relative to one another, are guided along one another and can be displaced along the joint longitudinal axis before the first and second coupling elements can be releasably connected to one another through the first section, wherein the first sections for releasable connection of the first and second coupling elements each have a thread with at least one thread flight, further comprising a guide ring which extends around the coupling protrusion on one end of the thread on the coupling protrusion, wherein the at least one thread flight of the thread on the coupling protrusion ends at the guide ring so that a lateral surface of the guide ring is not interrupted by the at least one thread flight. |
