Patent ID: 9101369
Filing Date: 2015-08-11
Classification: A61B

Abstract:
1. A surgical instrument, comprising: a handpiece having a drive; and a surgical tool, which has a tube and a working part with a shaft and a tool head, wherein the tube of the surgical tool can be detachably connected to the handpiece by means of a first coupling part and wherein the shaft of the working part can be detachably connected to a drive shaft in the form of a pin of said drive by means of a second coupling part simultaneously, wherein a mount in said handpiece receives said first coupling part of the surgical tool, said handpiece comprising two clamping pins displaceable in oblique grooves, said clamping pins extending via a ring-shaped pressing plate under spring action into an interior of said mount, said clamping pins meshing with a circular ring groove of the first coupling part in a locked position, said clamping pins being displaceable in said oblique grooves against the spring action during insertion of the surgical tool, wherein an actuating slide is pressed in an axial direction by means of said ring-shaped pressing plate by at least one spring into a locked position, said actuating slide being axially displaceable in a release position against the spring force to free the clamping pins from the second coupling part, said pin of said drive meshing with the second coupling part, wherein at least two grooves, whose width and depth correspond to a shape of the pin of said drive, extend at right angles to each other in an end area of the second coupling part, said at least two grooves intersecting with each other, wherein cams formed by milled grooves have edges, each of said edges extending toward said milled grooves and each of said edges being beveled toward said milled grooves to simplify positioning of the second coupling part on the pin of the drive, each of said grooves being defined by two planar parallel extending side walls and a curved bottom wall, said curved bottom wall connecting said two planar parallel extending side walls.