Antibacterial device for spraying a liquid

An antibacterial spray device for spraying a liquid contained in a receptacle (R), the device comprising:

• a pump (P) which is mounted on the receptacle (R) by a collar (C), the pump (P) having an outlet tube (G);
• an endpiece (1) designed to cover the outlet tube (G) of the pump (P), the endpiece (1) including an internal duct (11) and a closed end cavity (10), the internal duct (11) extending from the outlet tube (G) to the closed end cavity (10) and being of annular section about an axial rod (4), the axial rod (4) having a downstream longitudinal end (4a), the closed end cavity (10) being defined inside the endpiece (1) by a front wall thereof and the downstream longitudinal end (4a) of the axial rod (4), the front wall being pierced by an ejection orifice (100);
• a tapering cylindrical outside wall (12) which coaxially surrounds the internal duct (11), the tapering cylindrical outside wall (12) being attached at a bottom portion thereof to a bearing shoulder (13) for operating the pump (P);
• and
• a valve (2) housed in the closed end cavity (10);
• wherein all component parts that come into contact with the liquid, including the endpiece (1), are made, at least in part, of a plastics material containing between 0.2% and 2% by weight of a bactericidal agent which acts solely by coming into contact with the liquid but without being released into the liquid.