Provided is a head having an actuating and product dispensing mechanism (30), which includes a coupling part, at least one product dispensing conduit (44), supported by the coupling part; a maneuvering lever (46), rotatably mounted on a pivot axis. A protective cap (32) is provided covering the actuating and dispensing mechanism (30), the protective cap (32) having the pivot axis situated outside the dispensing conduit (44), between the movement axis (A-A′) and the dispensing opening (70).