Surgical punching instrument

A surgical punching instrument, comprising:

• a fixed handle;
• a tubular guide part, said fixed handle being connected to said tubular guide part, said tubular guide part defining a cylindrical guide part cavity, said guide part defining an axially extending guide slot;
• an actuating lever mounted on said fixed handle such that said actuating lever pivots from a non-use position to a use position, said actuating lever having a lever arm portion;
• a plunger having a plunger contact portion located at an end thereof, said actuating lever being in contact with said plunger via said lever arm portion, said plunger contact portion being located at a distal end of said tubular guide part when said actuating lever is in said non-use position;
• a compression spring, said plunger contact portion of said plunger engaging one end of said compression spring;
• a punching bar having a rearward mounting part, said rearward mounting part engaging another end of said compression spring, said rearward mounting part having an at least partially cylindrical guide section, said punching bar being guided in said guide part rotatably via said guide section, said punching bar having a ring shoulder, said ring shoulder being located in said guide part, said rearward mounting part being mounted in said cylindrical guide part cavity of said guide part, wherein said punching bar and said punching slide have guide elements, said guide elements of said punching slide detachably engaging said guide elements of said punching bar such that said guide elements of said punching slide form a positive-lock connection with said guide elements of said punching slide, said punching slide being axially movable along said punching bar, said punching slide and said punching bar having bent portions, said bent portions being located in front of said guide part, wherein said punching slide and said punching bar extend radially offset in relation to an axis of said guide part;
• and
• a punching slide, said plunger being detachably connected to a rear end of said punching slide such that said plunger moves in an axial direction in said guide part when said actuating lever is in said use position, said plunger compressing said compression spring when said actuating lever is in said use position, wherein said cylindrical guide part cavity has a dimension such that said mounting part is received by said guide part against a direction of actuation of said punching slide, whereby said punching slide is disconnected from said guide part in said direction of actuation of said punching slide;
• and
• a spring-loaded locking lever defining an axial stop, said ring shoulder having a ring shoulder surface defining a plurality of notches, each notch defining a rotational position of said punching bar and said punching slide, said locking lever extending through said cylindrical cavity of said guide part such that said locking lever detachably engages one of said notches of said ring shoulder, whereby said ring shoulder prevents said punching bar and said punching slide from rotating when said locking lever engages one of said notches of said ring shoulder.