Sealing member and fluid-product dispenser including such a member

1. A stopper member for mounting on an opening of a fluid reservoir, said member comprising:

a base body forming a fluid dispenser orifice;

a separate assembly part, including a collar defining a solid thickness, in which the base body is received in stationary manner; and

a closure lid for closing the dispenser orifice, the lid being connected to the assembly part via a hinge, the lid and the assembly part forming a single-piece molding, the lid and the assembly part being molded as a single piece, initially being connected together via at least one bridge of molded material, the first opening of the lid causing the bridge to rupture and releasing the dispenser orifice; and

the base body is inscribed entirely inside the assembly part,

wherein the base body and the assembly part are distinct parts that are separately formed,

wherein the collar surrounds the base body and the lid, and

wherein the collar defines a maximum thickness of the stopper member.

2. The stopper member according to claim 1 , wherein the lid is inscribed entirely inside the assembly part.

3. The stopper member according to claim 1 , presenting a configuration that is generally flat in such a manner as to extend in a plane, the maximum thickness of the collar extending perpendicularly to the plane.

4. The stopper member according to claim 1 , wherein the base body is received by leaktight snap-fastening inside the collar of the assembly part.

5. The stopper member according to claim 1 , wherein the lid defines a maximum thickness of the stopper member.

6. The stopper member according to claim 1 , wherein the collar and the lid each define a maximum thickness of the stopper member.

7. The stopper member according to claim 1 , wherein the assembly part defines a sealing zone for coming into leaktight contact with the opening of the reservoir.

8. A fluid dispenser comprising:

a fluid reservoir of variable volume that comprises at least one flexible sheet defining an opening; and

a stopper member according to claim 1 mounted in the opening of the sheet.

9. The stopper member according to claim 1 , wherein the assembly part forms a ring and an outermost periphery of the base body is inscribed within the ring of the assembly part.

10. A stopper member for mounting on an opening of a fluid reservoir, the member presenting a generally planar structure extending in a plane, the member comprising:

a base body comprising a fluid dispenser orifice;

an assembly part including a collar defining a solid thickness in which the base body is received; and

a lid that closes the dispenser orifice, the lid connected to the assembly part via a hinge; and

the base body is inscribed inside the assembly part with an outermost peripheral edge of the base body contained within the assembly part, such that forces applied to the member in a direction substantially parallel to the plane in which the member extends are borne by the assembly part,

wherein the base body and the assembly part are separately formed, and

wherein the collar defines a maximum thickness of the stopper member.

11. The stopper member according to claim 10 , wherein the assembly part forms a ring and the outermost peripheral edge of the base body is inscribed within the ring of the assembly part.

12. The stopper member according to claim 10 , wherein the lid and the assembly part-are a one-piece integral construction.

13. The stopper member according to claim 10 , wherein, the lid and the assembly part are also connected by a frangible bridge that is configured to break upon opening of the lid about the hinge.

14. The stopper member according to claim 1 , wherein the collar comprises an annular snap-fastening groove in which that base body is received.