Abstract: An outer shaft for receiving a shaft of an endoscope comprises a proximal end region for receiving a proximal end region of the shaft of the endoscope, a sealing surface for resting on a corresponding sealing surface of the endoscope for locally fluid-tight sealing of an intermediate space between outer shaft and shaft of the endoscope and a radially inwardly protruding cleat in the proximal end region for proximally engaging behind a radially outwardly protruding cleat on the proximal end region of the shaft of the endoscope. The radially inwardly protruding cleat is provided on a section of the proximal end region of the outer shaft that is elastically deformable in the axial direction of the outer shaft.

Abstract: A method for supplementing a shaft tube and an assembly of a medical instrument with a plastic component comprises a step of providing a shaft tube with a distal end; a step of mechanically connecting an assembly to the distal end of the shaft tube by way of a connecting device; a step of inserting the shaft tube with the assembly into a casting mold and closing the casting mold, a predetermined region of the outer surface of the assembly contacting a mold surface of the casting mold; a step of supplying a liquid plastic into the casting mold, the liquid plastic wetting the distal end of the shaft tube and the outer surface of the assembly; and a step of solidifying the liquid plastic, the solidified plastic forming the plastic component and creating a further mechanical connection of the assembly to the end of the shaft tube.

Abstract: A method for supplementing a component (20) of a medical instrument (10) by way of a plastic component comprises the steps of inserting (106) the component (20) of the medical instrument (10) into a casting mold (70) and closing (107) the casting mold (70), a first region (72) of a mold surface of the casting mold (70) being placed against the component (20) and a casting chamber (78) remaining between a second region (74) of the mold surface of the casting mold (70) and the component (20); a step of supplying (108) a liquid plastic to the casting chamber (76); and a step of coupling (111) electromagnetic radiation into the liquid plastic within the casting chamber (76) in order to trigger a solidification of the plastic and in order to form the plastic component.