| 摘要 |
A surgical instrument is provided with a gripping part arranged in a stationary manner on a tubular guide housing having a guide hole and with an actuating lever, which is pivotably mounted thereon and which is in functional connection via a lever arm with a plunger. The plunger is axially shiftable in a mounting housing, via which a tool can be actuated. The plunger has, in its end area located adjacent to the lever arm, a circumferential, radially expanded pushbutton, via which the plunger is guided axially adjustably against the spring force of an axial compression spring in the guide hole of the guide housing. The mounting housing is provided with a ring shoulder for axial fixation in the guide hole of the guide housing. To guarantee secure fixation of the mounting housing in the guide housing along with simple handling and low manufacturing costs, a radially inwardly projecting stop of a pin-like design is provided in the guide hole of the guide housing. The ring shoulder has on its circumference an axial groove, which extends from the free end of the ring shoulder into an at least partially circumferentially extending ring groove axially defining the ring shoulder. The positioning of a section of the stop, which said section extends into the guide hole, and the dimensions of the axial groove are coordinated with one another such that the ring shoulder with its axial groove can be pushed into the guide hole beyond the stop and can be axially locked in the guide hole by the section of the stop after a rotation about the axis of the guide hole.
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