DEVICE dispensing a product fluid comprising a container (102) having a dispensing (103) comprising a dispensing head (104) movable in translation and provided with a stop COMMAND (104A) and a cap (106 ) covering the container (102) and the dispensing head (104), TOP IN WHICH articulated a lever (107) BRINGING THE LEVER a support element (109) CAN RELY ON TOP OF CONTROL (104A) the dispensing head (104) to sink the dispensing head (104). The support element (109) has, in section in a plane of rotation of the lever (107), a way that a constant point (P) STOPPER KNOB distribution head (104) transmits a force applied At the end of the lever (107) AND DURING THE INTRODUCTION OF HEAD (104) the application point (P) of force PARALLEL moves to the translation axis (X HEADER (104) of the dispenser. ELEMENT SUPPORT (109) TIENEPARTICULARMENTE THE FORM OF A involute (C).
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