Fluid product dispensing element and dispenser comprising one such element

A fluid dispenser comprising both a fluid reservoir defining a reservoir with an opening (90), and a dispenser member mounted on the opening of the reservoir;

• the fluid dispenser member comprising:
• a body (1) inwardly defining a chamber (15) of variable volume, said body defining a bottom end (10);
• an actuator rod (7) that can be reciprocated axially in said body, thereby causing the volume in said chamber to vary, said rod comprising a bottom portion engaged in the body, and a top portion defining a top end (79);
• a peripheral bearing collar (52) extending radially outwards, said collar including a bottom face (51);
• and
• a neck gasket (2) including a top face (21) and a bottom face (22), the top face (21) being in contact with the bottom face (51) of the collar (52), and the bottom face (22) being designed to come into contact with an edge (911) of the opening (90) of the reservoir (9),
• wherein the axial height HS2 between the bottom face of the gasket and the top end of the actuator rod is substantially equal to the axial height HI2 between the bottom face of the gasket and the bottom end of the body;
• and
• wherein HS2 and HI2 are all about 7 mm to 9 mm;
• and
• wherein the reservoir (9) includes a substantially cylindrical projecting neck (91) defining the opening (90), said neck defining a free top end forming an annular edge (911) on which the gasket (2) rests, and a bottom end connected to the reservoir body, the bottom end (10) of the body being situated in the neck;
• and
• wherein the axial height HC of the neck is about 7 mm to 9 mm for an inside diameter of about 8 mm and an outside diameter of about 13 mm.