Plug-in coupling for a head for a washing brush comprises a nipple having an outer surface with a non-rotationally symmetrical contour in a cross-sectional plane for interacting with the coupling in a complementing contour

摘要

Plug-in coupling comprises a nipple (2) having an outer surface with a non-rotationally symmetrical contour in a cross-sectional plane for interacting with the coupling in a complementing contour on an inner surface (30) of the coupling during connection in the longitudinal direction to prevent twisting. Independent claims are also included for the following: (1) Coupling for the plug-in coupling; and (2) Head for a washing brush with the above plug-in coupling. Preferred Features: A rib (31) running in the longitudinal direction (L) is formed on the inner surface of the coupling to interact with a toothed arrangement (20) formed on the outer surface of the nipple.