CN113661126B

CN113661126B - Fluid product dispenser

Info

Publication number: CN113661126B
Application number: CN202080027543.6A
Authority: CN
Inventors: G·茹尔丹
Original assignee: Aptar France SAS
Current assignee: Aptar France SAS
Priority date: 2019-04-11
Filing date: 2020-04-10
Publication date: 2023-05-26
Anticipated expiration: 2040-04-10
Also published as: FR3094896B1; EP3953056A1; CN113661126A; FR3094896A1; WO2020208321A1; BR112021019095A2

Abstract

A fluid product dispenser having: -a fluid product container (R) provided with an externally threaded neck (C) forming at least one helical external thread (T) and an annular upper edge (C1), -a dispensing head (D) having a dispensing means (P), a push rod (B) and a securing means (R1) engaging the externally threaded neck (C) and the dispensing means (P), the securing means (R1) having a skirt (11) forming an internal thread (12) engaging the external thread (T) of the externally threaded neck (C), the skirt (11) extending downwards from the outer periphery of an annular flap (15) supported on the annular upper edge (C1), characterized in that the annular flap (15) is deformable such that the skirt (11) can move axially with respect to the externally threaded neck (C) when the annular flap (15) has been brought into contact with the annular upper edge (C1).

Description

Fluid product dispenser

Technical Field

The present invention relates to a fluid product dispenser having a fluid product container provided with an externally threaded neck defining an opening therein, said opening communicating with the interior of the container. The dispenser also has a dispensing head mounted on the neck of the container, the dispensing head having a dispensing mechanism, such as a pump or valve, a push rod for actuating the dispensing mechanism, and a securing mechanism for simultaneously engaging the threaded neck of the container and the dispensing mechanism. Such dispensers are often used in the field of perfumes, cosmetics or medicine.

Background

Generally, the securing mechanism has a rigid skirt that internally forms one or more threaded surfaces for mating with the threaded neck of the container. In order for the dispensing head to be disposed on the container, it is only necessary to screw a securing mechanism having a threaded skirt onto the threaded neck of the container. Generally, the securing mechanism has a rigid annular tab that presses the neck seal against the annular upper edge of the neck. The final position of the securing means is determined by the compression of the neck seal, which ensures the tightness of the dispenser. This final position corresponds to a certain screwing torque value and a specific axial position of the skirt.

Generally, the neck extends from the shoulder. With those screw-on fastening mechanisms contact cannot be made between the lower edge of the skirt and the shoulder of the neck. In practice, the desired screwing torque values and contact on the shoulder are not substantially simultaneously obtained. Either the screwing torque is reached but there is no contact or there is contact but no screwing torque is reached. In summary, these two objectives are not possible to achieve simultaneously in practice.

More generally, it is desirable to benefit from a greater axial extent of the final screwing position of the skirt. Without requiring the skirt to contact the shoulder of the container, it would be advantageous if the screwing torque value was not determined by the limit value of compression of the neck seal. In practice, the machine which screws the skirt onto the neck is adjusted to perform a precise rotation value. If this rotation value does not adequately compress the neck seal, a risk of leakage and/or accidental release may occur. Conversely, if the rotation value is too much pressing against the neck seal, there is a risk of neck breakage. The increased range of rotational or skirt axial heights eliminates all hazards associated with tightening too tightly or not tightening tightly. This is not possible with conventional screw-on fixing mechanisms.

The present invention aims to remedy the aforementioned drawbacks of the prior art by proposing a fluid product dispenser in which the securing means are sufficiently screwed over an extended axial extent, in particular when the securing means are axially supported on the neck shoulder.

Disclosure of Invention

To this end, the invention proposes a fluid product dispenser having:

a fluid product container provided with an externally threaded neck defining an opening internally, said opening communicating with the interior of the fluid product container, said externally threaded neck forming at least one helical external thread and an annular upper edge,

a dispensing head mounted on the externally threaded neck of the fluid product container, the dispensing head having a dispensing means, such as a pump or a valve, a push rod for actuating the dispensing means, and a securing means simultaneously engaging the externally threaded neck of the fluid product container and the dispensing means, the securing means having a skirt forming an internal thread which engages the external thread of the externally threaded neck, the skirt extending downwardly from the outer periphery of an annular flap supported on the annular upper edge, optionally a sealing ring being interposed between the annular upper edge and the annular flap,

characterized in that the ring segments are deformable such that the skirt is axially movable relative to the externally threaded neck when the ring segments have been brought into contact with the annular upper edge.

The ring segments are pivotable, bendable, expandable, arcuately bendable, expandable, compressible, etc. to provide a certain freedom of axial movement of the skirt, in particular with respect to the radially inner edges of the ring segments, which are typically connected to a receiving holder of the pump or valve.

By means of this axial movement of the skirt, the lower edge of the skirt can come into contact with the shoulder of the container by acting on the deformation of the annular tab when the desired screwing torque has been reached. The elastic deformation of the ring segments, in addition to the elastic deformation of the neck seal, therefore significantly increases the axial height range in which there is sufficient final screwing torque. The elastic deformation threshold of the ring segments can be determined to be approximately or exactly equivalent to the required screwing torque.

According to an advantageous feature, the annular tab may define a substantially fixed inner annular contact zone, which is first in contact with the annular upper edge, and a movable outer annular connection zone, which is initially out of contact with the annular upper edge and is connected to the skirt, so that by movement of the movable outer annular connection zone towards the annular upper edge, the skirt can be moved axially with respect to the externally threaded neck.

Thus, it can be said that the connection region moves axially relative to the contact region. According to one embodiment, the ring segments may be inclined inwardly and downwardly as a whole.

According to another embodiment of the invention, the internal thread may be formed by a plurality of flanges, at least some of which are in bearing contact with the external thread of the neck so as to deform the external thread. Advantageously, each flange has two substantially triangular sides and two opposite inclined surfaces, which are connected at a radially inward tip.

In document WO 2009/150251 A1, the skirt forms a flange with a trapezoidal shape, two sides and two opposite inclined ramps engaging one vertical flat side. The invention proposes to remove this vertical flat side, since it affects the screwing in of the fastening means. Empirically we have found that the indentations formed by the external threads of the neck are formed substantially at the vertical flat sides, as the vertical flat sides extend perpendicular to the force exerted by the external threads of the neck. These indentations are both deep and wraparound. At the inclined ramp, the indentations are less pronounced, as the inclined ramp extends laterally rather than vertically.

Thus, removal of the vertical flat side can:

limiting contact of each flange on only one side of the external thread of the neck,

-reducing the unscrewing torque of the screw,

-allowing the external thread of the neck to interact with the tip of the flange during screwing, and

-reducing the screwing torque.

The advantages relating to mounting and unscrewing, and in particular to screwing, are manifold.

Advantageously, the skirt with triangular flanges may be open so as to form jaws separated by vertical slits, but preferably the skirt is continuous over the whole circumference. The continuous skirt also enables the skirt to be pressed against the external thread of the neck by means of the collar. With a continuous skirt, the pushing of the external thread of the neck by the skirt can only be applied by the skirt.

According to an advantageous feature, the skirt may have an upper portion and a lower guide portion extending under the internal thread (or flange). Advantageously, the inner diameter of the lower guide portion is larger than the inner diameter of the upper portion. The lower guide portion facilitates positioning of the skirt around the neck prior to the screwing operation. The lower guide portion also serves to lengthen or extend the skirt so that the skirt can contact the neck shoulder. The lower guide portion also facilitates positioning of the skirt around the neck prior to the screwing operation. Thus, the skirt is prevented from being fully supported on the upper edge of the neck.

In some cases, the securing mechanism may have a collar engaged around the skirt, which preferably contacts the shoulder of the container.

According to another advantageous feature of the invention, the elastic deformation threshold of the ring segments may correspond approximately to the determined final screwing torque, so that the ring segments deform once the determined final screwing torque is reached. The skirt is thus moved by means of deformation of the ring segments without exceeding (or minimally exceeding) the determined final screwing torque. At the end of the screwing, the lower edge of the skirt and/or collar can bear against the shoulder of the neck, ensuring that the securing mechanism is completely stable and this does not risk damaging the flange engaged by the external thread.

According to another embodiment of the invention, the internal thread of the skirt may be formed by a plurality of flanges, at least some of which are in bearing contact with the external thread of the neck so as to deform on the external thread, the skirt being unscrewed or unscrewable from the neck and then screwed back on the neck, the skirt, when screwed back on the neck with a determined final screwing torque, bringing the lower edge of the skirt into direct or indirect contact with the shoulder of the container by acting on the deformation of the ring segments, which ensures good tightness of the container without risking damaging the skirt or the neck. Advantageously, the elastic deformation threshold of the ring segments may approximately correspond to the determined final screwing torque, so that the ring segments deform once the determined final screwing torque is reached.

The idea of the invention is to provide the ring segments of the securing mechanism with deformability in order to arrange the final axial position of the skirt and the screwing torque required to ensure the tightness of the dispenser. Thus, to enlarge the height range or axial positioning of the skirt, a screwing torque is sufficient within said height range or axial positioning range. This arrangement allows the skirt (or collar) to contact the shoulder of the neck without exceeding the required final screwing torque. This annular contact with the neck shoulder allows the securing mechanism to remain secure on the neck without damaging the skirt.

Drawings

The invention will now be described in more detail with reference to the accompanying drawings of various embodiments of the invention, given as non-limiting examples.

The drawings are as follows:

FIG. 1 is a vertical cross-sectional view of a dispensing head during threading onto a threaded neck;

FIG. 2 is similar to FIG. 1 and shows in a final screwed position;

fig. 3a to 3d are highly enlarged vertical cross-sectional views showing four examples of the embodiment shown in fig. 1 and 2;

FIG. 4 is a vertical cross-sectional view of another dispensing head ready for installation on a threaded neck;

FIG. 5 is a perspective view of the neck of FIG. 4;

FIG. 6 is similar to FIG. 4 and is shown in a final installed position;

FIG. 7 illustrates one example of a securing mechanism of the embodiment shown in FIGS. 4 and 6; and

fig. 8a to 8c are highly enlarged views of flanges which are easily implemented in the embodiments shown in fig. 4, 6 and 7.

Detailed Description

Referring first to fig. 1 and 2, there is shown an embodiment in which the securing mechanism R1 for securing the pump P to the neck C of the container R has a deformable annular sheet 15.

More precisely, the dispensing head shown in fig. 1 and 2 has a dispensing mechanism P, which may be a pump or a valve. The dispensing mechanism P has a body P1 forming a flange P2 and an actuating rod P3, the actuating rod P3 sliding axially reciprocally inside the body P1. The dispensing mechanism P is connected to a push rod B which forms a dispensing orifice B1. For fixing the dispensing means P on the threaded neck C of the container R, a fixing means or ring R1 is used, which has a skirt 11 internally provided with an internal thread 12. The skirt 11 defines an annular lower edge 13, connected at its upper end to an annular tab 15 which is elongated to form a receiving seat 14 for the body P1 of the dispensing mechanism P. The ring segment 15 is positioned above the flange P2. Alternatively, the dispensing head may have a cladding collar F that engages around the skirt 12 to cover the skirt.

The neck C of the container R forms one or more external threads T with a pitch corresponding to the pitch of the internal threads 12 of the skirt 11. Thus, the dispensing head can be screwed onto the neck C by interlocking the internal thread 12 with the external thread T.

The dispensing head also has a neck seal G arranged on the upper annular edge of the neck C, below the flange P2 of the body P1. Thus, when the securing means R1 is screwed onto the threaded neck C, the neck seal G is intended to be acted upon by the annular piece, being pressed or compressed between the upper edge C1 and the flange P2.

This relates to the entirely general design of fluid product dispensers in the cosmetic, cosmetical or pharmaceutical fields.

According to the invention, the ring-shaped tab 15 of the skirt 11 connected to the receiving seat 14 is deformable so that the skirt 12 can move axially with respect to the receiving seat 14 when the fixing means R1 are screwed onto the threaded neck C. In general, the deformable annular sheet 15 has a substantially fixed inner annular contact area 151 and a movable outer annular connecting area 152 connected to the skirt 11. The fixed inner region 151 is directly connected to the receiving anchor 14. As can be seen in fig. 1, the ring segments 15 have an upward and outward inclination such that the fixed inner region 151 is in contact with the flange P2, while the movable outer region 152 is disengaged. Continuing to screw the securing means R1 onto the threaded neck C from the position shown in fig. 1, the neck seal G is compressed, since the secured inner region 151 is supported on the flange P2. At the same time, or afterwards, the ring segment 15 is deformed so as to reset the movable outer region 152 towards the ring segment P2. This is shown in fig. 2. It can be seen that the ring segments 15 are substantially horizontal so that the region of contact with the flange P2 extends radially outwardly. This position corresponds to the final screwing position, in which the neck seal G is sufficiently compressed to ensure tightness of the dispenser.

It should also be noted that the lower edge 13 of the skirt 11 is in contact with the shoulder S of the container R from which the threaded neck C extends. It should also be noted that the cladding collar F may also be in contact with the shoulder S. In fact, in the final screwing position, where the screwing torque is optimal, the skirt and/or collar can come into contact with the shoulder. The elastic deformation threshold of the ring segments can be determined to be approximately or exactly equivalent to the required final screwing torque.

By means of the deformable annular disc 15, the threaded skirt 11 can be screwed onto the threaded neck C without excessively compressing the neck seal G, since the downward axial movement of the skirt 11 is due to the deformation of the annular disc 15. The skirt 11 may even be screwed into contact with the shoulder S so that a part of the force of the shoulder S can be absorbed. In addition, the securing means R1 are more stable on the neck C, since they are supported on the shoulder S over the entire circumference of the skirt 11. The deformable annular disc 15 thus has various advantages, namely, the advantage of facilitating the control of the compression of the neck seal G, the advantage of the axial positioning of the threaded skirt 11, the aesthetic appearance of the fixing means R1 supported on the shoulder S, the advantage of the contact of the skirt 11 on the shoulder S, the advantage of withstanding the forces and the stability of the fixing means R on the neck C.

The deformable ring section 15 shown in fig. 1 and 2 is based on the principle that the outer region 152 pivots relative to the inner region 151. The ring segments are pulled back from an upwardly inclined starting position to a final position in which they are substantially planar. Fig. 3a to 3d show an embodiment of the deformable annular sheets 15.

In fig. 3a, the securing mechanism R2 has a deformable annular sheet 25 with a large radially outwardly directed fixed inner region 251 connected to a movable outer region 252 by a small thickness bridge 253. Thus, the connected movable outer region 252 can be moved downward relative to the fixed inner region 251 by deformation of the bridge 253.

Fig. 3b shows a securing mechanism R3 having a deformable annular sheet 35 with a fixed inner region 351 connected to a movable outer region 352 by an inverted V-shaped engagement portion. Thus, upon deformation or deployment of the inverted V-shaped engagement portion 353, the movable outer region 352 may move axially downwardly relative to the fixed inner region 351.

Fig. 3c shows a securing mechanism R4 with a deformable annular flap 45 having a fixed inner region 451 connected to a movable outer region 452 by an outwardly upwardly directed connecting portion 453.

Fig. 3d shows a securing mechanism R5, wherein a fixed inner region 551 is separated from a movable outer region 552 by a return G1 of the neck seal G'. In other words, the extension of the neck seal is disposed between the fixed inner region 551 and the movable outer region 552.

Regardless of the embodiment of the deformable annular sheets, the latter can vary the final axial position of the skirt 11 with respect to the portion of the securing mechanism R1 secured with respect to the neck.

Another embodiment will now be described with reference to fig. 4 to 6, in which the securing means R6 has a deformable annular sheet 15 and a skirt 61, the internal thread of which is in the shape of a flange 62.

The dispensing mechanism P is the same as the dispensing mechanism of the first embodiment shown in fig. 1 and 2. However, the body P1 has a flange P2' that lockingly engages within a receiving fixture 64 formed by the securing mechanism R6. The deformable annular sheets 15 may be the same as the deformable annular sheets of the first embodiment, i.e. have an initial inclination outwardly and upwardly. The skirt 61 forms a plurality of internal flanges 62, preferably three to ten, preferably six. The flanges 62 can extend over the ring, i.e. at the same axial height, or vice versa, with different axial heights.

The dispensing head of this embodiment also has a cladding collar F which engages around the skirt 61. In fig. 4, the cladding collar F is only partially engaged around the skirt 61, leaving the flange 62 free.

As shown in fig. 4 and 6, the flange 62 has a triangular shape in vertical cross section. Each flange has an upper ramp 621 and an outer ramp 622 that join at a tip portion 623, as shown in fig. 6.

The container of the fluid product R forms a shoulder S, from which a neck C projecting from the shoulder is provided with two external threads T, as shown in fig. 5. Each external thread T extends substantially over half the circumference of the neck C. Thus, the neck C has two external threads T near its upper annular edge C1 and defines an opening O into the container.

According to the invention, the skirt 61 engages around the threaded neck C in a purely axial translational movement which is not rotational. Thus, flange 61 is forced over external thread T until the final position shown in fig. 6 is reached, where at least some portion of flange 62 engages under the external thread. It should also be noted that the lower edge 63 of the skirt 61 is in contact with the shoulder S of the container R. The lowering of collar F around flange 62 may occur after flange 62 engages under external thread T. In the final installed position shown in fig. 6, collar F may also be in contact with shoulder S.

Skirt 61 has an upper portion 611 extending from the movable outer region 152 of ring segment 15 to flange 62. Skirt 61 also has a lower guide portion 612 that forms lower edge 63. Flange 62 may be positioned across the junction between upper portion 611 and lower portion 612. The flange 62 may also be positioned entirely at the upper portion 611 or at the lower portion 612. It should be noted that the inner diameter of the lower guide portion 612 is greater than the inner diameter of the upper portion 611. Thus, the lower guide portion 612 facilitates initial engagement of the skirt 61 about the threaded neck C.

Fig. 7 shows an embodiment of the securing mechanism R6. In this embodiment, the securing mechanism R7 has a receiving anchor 14 for receiving the flange of the dispensing mechanism body, an non-deformable annular tab 75, and a skirt 71 having a flange 62'. This embodiment has no lower guide portion extending below the flange 62'.

Fig. 8a, 8b and 8c show different possible shapes of the flange. In fig. 8a, flange 62 is the flange shown in fig. 4 and 6. The flange has a rectangular planar upper ramp 621 that connects to a rectangular planar lower ramp 622 at a linear tip or pointed portion 623. The sides 620 are triangular and preferably parallel. The two

inclined surfaces

621 and 622 may have the same inclination angle, but the two inclination angles are opposite with respect to the vertical line. However, it should be noted that lower ramp 622 is longer than upper ramp 621. Thus, the surface area of the lower slope 621 is greater than the surface area of the upper slope 621.

In fig. 8b, there is a flange 62' shown in fig. 7. The side 620' is substantially triangular with a small step in the upper portion. The two sides 620 are planar but not parallel to each other as shown in fig. 7. In practice, the two sides 620' diverge upwardly, ideally at an angle of about 4 ° to 6 °, but the angle may be as large as 20 °, and vice versa as small as 2 °. For this reason, the inclined surfaces 62T and 622' are not rectangular, but slightly trapezoidal. The straight tip 623 'is biased downwardly such that the surface area of the upper ramp 62T is greater than the surface area of the lower ramp 622'.

In fig. 8c, the flange 62 "has curved ramps 621" and 622 ", which are thus connected at a more protruding tip portion 623". The side 620 "is still substantially triangular with a straight base and two other curved sides. The sides 620 may be parallel to each other or, conversely, diverge from each other as is the case with the flange 62'.

In all embodiments, the sides are substantially triangular, with two opposing ramps joined at a common tip portion. This particular arrangement of the flange not only allows engagement of the skirt 61 around the threaded neck by a purely axial translational movement, so as to remove the dispensing head by unscrewing, but also makes it particularly easy to screw the skirt 61 onto the threaded neck C. The deformable annular sheets may make contact at the shoulder S to increase the stability of the dispensing head, but forces may also be distributed between the skirt 61 and the container R. The elasticity of the deformable annular sheets also ensures tightness of the dispenser when screwed in.

It follows that the deformable annular sheets may be implemented on a threaded connection ring with a threaded skirt, or on a collar that does not require screwing. It follows that the collar with flange may or may not be connected to the deformable annular sheets. It goes without saying that the deformable annular sheet 15 of the fixing ring R6 can be replaced by any deformable annular sheet whatsoever of fig. 3a, 3b, 3c or 3 d.

Preferably, the skirt 61 of the securing means R6 is continuous over its entire circumference. However, the skirt may also be open, forming claws separated by axial slits, as in the prior art in document WO 2009/1503551 A1.

By means of the invention, the threaded skirt of the securing means can be positioned over an extended axial height range relative to the threaded neck while ensuring that the neck seal is sufficiently compressed.

By means of the invention, the securing means are arranged with a flanged skirt which can be locked, unscrewed and then re-screwed on. The elastic deformation of the ring segments also adjusts the positioning of the flanged ring relative to the threaded neck and ensures tightness after screwing.

Claims

1. A fluid product dispenser having:

-a fluid product container (R) provided with an externally threaded neck (C) defining internally an opening (O) communicating with the interior of the fluid product container, said externally threaded neck (C) forming at least one helical external thread (T) and an annular upper edge (C1),

a dispensing head (D) mounted on the externally threaded neck (C) of the fluid product container (R), the dispensing head (D) having a dispensing means (P), a push rod (B) for actuating the dispensing means (P), and a securing means (R1; R2; R3; R4; R5; R6) simultaneously engaging the externally threaded neck (C) of the fluid product container (R) and the dispensing means (P), the securing means (R1; R2; R3; R4; R5; R6) having a skirt (11; 61) forming an internal thread (12; 62) which engages with the helical external thread (T) of the externally threaded neck (C), the skirt (11; 61) extending downwardly from the outer periphery of an annular plate (15; 25;35;45; 55) supported on the annular upper edge (C1) between which a sealing ring (G) is interposed,

characterized in that the ring segment (15; 25;35;45; 55) is deformable so that the skirt (11; 61) is axially movable with respect to the externally threaded neck (C) when the ring segment (15; 25;35;45; 55) has been brought into contact with the annular upper edge (C1);

the securing means (R1; R2; R3; R4; R5; R6) have a collar (F) which engages around the skirt (11; 61) and which, when the skirt (11; 61) engages around the externally threaded neck (C) with a defined final screwing torque, comes into contact with a shoulder (S) of the fluid product container (R) by acting on deformation of the annular flaps (15; 25;35;45; 55), which ensures good tightness of the fluid product container without risk of damaging the skirt or the externally threaded neck.

2. A dispenser of fluid products according to claim 1, characterized in that the elastic deformation threshold of the ring segments (15; 25;35;45; 55) corresponds approximately to the determined final screwing torque, so that the ring segments deform once the determined final screwing torque is reached.

3. A dispenser as claimed in claim 1, wherein the internal thread of the skirt (61) is formed by a plurality of flanges (62; 62', 62 "), at least some of these flanges (62; 62', 62") being in bearing contact with the external thread (T) of the externally threaded neck (C) so as to deform against the external thread (T), the skirt (61) being able to be unscrewed from the externally threaded neck (C) and then re-screwed onto the latter with a determined final screwing torque, the collar being brought into direct or indirect contact with the shoulder (S) of the fluid product container (R) by acting on the deformation of the annular sheet (15), which ensures a good tightness of the fluid product container without risk of damaging the skirt or the externally threaded neck.

4. A dispenser according to claim 3, wherein the elastic deformation threshold of the ring segments (15; 25;35;45; 55) corresponds approximately to the determined final screwing torque, so that the ring segments deform once the determined final screwing torque is reached.

5. Fluid product dispenser according to claim 1, characterized in that the annular flap (15; 25;35;45; 55) defines a substantially fixed inner annular contact zone (151; 251;351;451; 551) which is initially in contact with the annular upper edge (C1) and a movable outer annular connection zone (152; 252;352;452; 552) which is initially out of contact with the annular upper edge (C1) and is connected to the skirt (11; 61) so that the skirt (11; 61) can be moved axially with respect to the externally threaded neck (C) by movement of the movable outer annular connection zone (152; 252;352;452; 552) towards the annular upper edge (C1).

6. A dispenser for fluid products according to claim 5, characterised in that the ring segments (15; 45) are inclined wholly inwards and downwards.

7. Dispenser according to claim 1, wherein the securing means (R1; R6) have a receiving seat (14) for the dispensing means (P), the skirt (11; 61) being movable relative to the receiving seat (14) by deformation of the annular flap (15).

8. Dispenser according to claim 1, wherein the internal thread of the skirt (61) is formed by a plurality of flanges (62; 62 '), at least some of these flanges (62; 62') being in bearing contact with the external thread (T) of the externally threaded neck (C) so as to deform against the external thread (T).

9. Fluid product dispenser according to claim 8, characterized in that each flange (62; 62';62 ") has two substantially triangular sides (620; 620'; 620") and two opposite bevels (621, 622;621',622';621 ", 622") which are connected at a radially inward tip (623; 623';623 ").

10. Fluid product dispenser according to claim 8 or 9, characterized in that the skirt (61) has an upper portion (611) and a lower guiding portion (612), the lower guiding portion (612) extending below the flange (62).

11. Fluid product dispenser according to claim 10, characterized in that the inner diameter of the lower guiding portion (612) is larger than the inner diameter of the upper portion (611).

12. The fluid product dispenser of claim 1, wherein the dispensing mechanism is a pump or a valve.

13. A fluid product dispenser having:

when the skirt engages around the external thread neck (C) with a defined final screwing torque, the skirt (11; 61) is brought into contact with the shoulder (S) of the fluid product container (R) by acting on the deformation of the annular flaps (15; 25;35;45; 55), which ensures good tightness of the fluid product container without risk of damaging the skirt or the external thread neck.

14. Fluid product dispenser according to claim 13, characterized in that the elastic deformation threshold of the ring segments (15; 25;35;45; 55) corresponds approximately to the determined final screwing torque, so that the ring segments deform as soon as the determined final screwing torque is reached.

15. A dispenser according to claim 13, characterized in that the internal thread of the skirt (61) is formed by a plurality of flanges (62; 62', 62 "), at least some of which flanges (62; 62', 62") are in bearing contact with the external thread (T) of the externally threaded neck (C) so as to deform against the external thread (T), the skirt (61) being able to be unscrewed from the externally threaded neck (C) and then re-screwed onto the latter with a determined final screwing torque, the skirt acting on the deformation of the ring segment (15), the lower edge (63) of the skirt (61) being in direct or indirect contact with the shoulder (S) of the fluid product container (R), which ensures a good tightness of the fluid product container without risk of damaging the skirt or the externally threaded neck.

16. Fluid product dispenser according to claim 15, characterized in that the elastic deformation threshold of the ring segments (15; 25;35;45; 55) corresponds approximately to the determined final screwing torque, so that the ring segments deform as soon as the determined final screwing torque is reached.

17. Fluid product dispenser according to claim 13, characterized in that the annular flap (15; 25;35;45; 55) defines a substantially fixed inner annular contact zone (151; 251;351;451; 551) which is initially in contact with the annular upper edge (C1) and a movable outer annular connection zone (152; 252;352;452; 552) which is initially out of contact with the annular upper edge (C1) and is connected to the skirt (11; 61) so that the skirt (11; 61) can be moved axially with respect to the externally threaded neck (C) by movement of the movable outer annular connection zone (152; 252;352;452; 552) towards the annular upper edge (C1).

18. A dispenser according to claim 17, wherein the ring segments (15; 45) are inclined inwardly and downwardly as a whole.

19. Dispenser according to claim 13, wherein the securing means (R1; R6) have a receiving seat (14) for the dispensing means (P), the skirt (11; 61) being movable relative to the receiving seat (14) by deformation of the annular flap (15).

20. A dispenser as claimed in claim 13, wherein the internal thread of the skirt (61) is formed by a plurality of flanges (62; 62 '), at least some of these flanges (62; 62') being in bearing contact with the external thread (T) of the externally threaded neck (C) so as to deform against the external thread (T).

21. Fluid product dispenser according to claim 20, characterized in that each flange (62; 62';62 ") has two substantially triangular sides (620; 620'; 620") and two opposite bevels (621, 622;621',622';621 ", 622") which are connected at a radially inward tip (623; 623';623 ").

22. Fluid product dispenser according to claim 20 or 21, characterized in that the skirt (61) has an upper portion (611) and a lower guiding portion (612), which lower guiding portion (612) extends under the flange (62).

23. Fluid product dispenser according to claim 22, characterized in that the inner diameter of the lower guiding portion (612) is larger than the inner diameter of the upper portion (611).

24. The fluid product dispenser of claim 13, wherein the dispensing mechanism is a pump or a valve.