EP3976494A1

EP3976494A1 - Fluid product refill and corresponding method

Info

Publication number: EP3976494A1
Application number: EP20740367.6A
Authority: EP
Inventors: Bruno Simon; Fabrice Soulard
Original assignee: Shiseido International France SAS
Current assignee: Shiseido International France SAS
Priority date: 2019-06-03
Filing date: 2020-06-02
Publication date: 2022-04-06
Anticipated expiration: 2040-06-02
Also published as: WO2020245533A1; FR3096671B1; JP2022535835A; FR3096671A1; EP3976494B1

Abstract

Fluid product refill (R) for filling a bottle (F) provided with a threaded neck (C), the refill (R) comprising: a flexible pouch (P) comprising an opening, a dispensing assembly (D1; D2) comprising a sealing appendage (11; 11') and a threaded connection sleeve (22; 22') adapted for the screwing of the threaded neck (C) of the bottle (F), the dispensing assembly (D1; D2) comprising: an insert (1; 1') forming the sealing appendage (11; 11'), a passage (10), and also a camway (120) or an external thread (120'), and - a stopper (2; 2') forming the threaded connection sleeve (22; 22'), and also a cam profile (210) or an internal thread (210') engaging with the camway (120) or the external thread (120'), respectively, wherein the stopper (2; 2') is initially in sealed engagement with the insert (1; 1') so as to close off the passage (10), the cam profile (210) or internal thread (210') moving in the camway (120) or external thread (120') subsequent to the threaded neck (C) of the bottle (F) being screwed into the threaded connection sleeve (22; 22'), so as to open the passage (10).

Description

FLUID PRODUCT REFILL AND PROCESS

CORRESPONDING

The present invention relates to a fluid refill for filling a bottle provided with a threaded neck. The bottle may form part of a dispenser further comprising a dispensing head including, for example, a pump. The dispensing head is removably screwed onto the threaded neck of the bottle. Such dispensers are frequently used in the fields of perfumery and cosmetics. The object of the refill of the invention is to refill the bottle with fluid, once its contents have been dispensed through the removable head. The head is therefore removed from the bottle by unscrewing it to be briefly replaced by the refill of the invention.

The object of the present invention is to define a fluid product refill which can easily and quickly be connected to the neck of the bottle in order to perform rapid filling of the bottle without risk of loss of fluid product. By fluid product is meant any liquid, such as a perfume, a lotion, a cream, a gel, a foundation, etc.

To do this, the present invention provides a refill with fluid for filling a bottle provided with a threaded neck, the refill comprising:

- a flexible pocket comprising an opening,

- a distribution assembly comprising a sealing appendage and a threaded connection sleeve forming an internal helical thread suitable for screwing the threaded neck of the bottle, the distribution assembly comprising:

- an insert forming the sealing appendage, a passage, as well as a cam track or an external thread, and

- a plug forming the threaded connection sleeve, as well as a cam profile or an internal thread engaged with the cam track or the external thread, respectively,

in which the plug is initially in tight engagement with the insert so as to close the passage, the cam profile or internal thread moving in the cam track or external thread, continued or following the screwing of the threaded neck of the bottle in the threaded connection sleeve, so as to open the passage.

In other words, the refill of the invention is in the form of a collapsible flexible bag mounted on a bag holder provided with a thread corresponding to that of the neck of the bottle. Thus, the refill can be screwed onto the neck of the bottle and its bag can then be pressed or crushed in order to force the fluid product from the bag into the bottle, and this without risk of loss of fluid product.

It is the neck of the bottle that will cause the stopper to rotate, thus establishing a fluid flow path between the flexible bag and the bottle. Preferably, the rotational drive of the stopper occurs following the screwing of the neck of the bottle in the threaded sleeve in the same direction of screwing, for example dextrorotatory, because more natural.

According to an advantageous characteristic, the insert and the cap form end-of-travel stop means to limit their mutual displacement. According to one embodiment, the insert can form a collar and the stopper can form a stop harpoon which is brought in force below the collar during the assembly of the stopper around the insert, but can no longer s' disengage from it.

In another aspect, only the sealing appendage enters the flexible pouch. Thus, the remainder of the dispensing assembly penetrates into or around the neck of the bottle, reducing the risk of leakage while allowing passage to evacuate the air from the container to be filled through the threaded area of the socket to speed up filling.

According to a practical embodiment, the outer cam track of the insert comprises two ends, namely an inlet end connected to an axial mounting channel and a blind end serving as end-of-travel stop means, a profile retainer being advantageously formed at the junction of the axial mounting channel with the outer cam track to maintain the internal cam profile in the outer cam track and thus prevent it from regaining the axial mounting channel. According to another interesting aspect, the insert can comprise a tube and the stopper can include a sleeve engaged around the tube inside the threaded connection socket. Preferably, the sleeve slides in a sealed manner around the tube between an initial closed position and a final open position, following the screwing of the threaded neck of the bottle in the threaded connection sleeve.

On the other hand, the insert may comprise a cylindrical body disposed between the sealing appendage and the tube and the stopper may comprise a skirt disposed below the threaded connection sleeve around the cylindrical body, the cylindrical body forming the cam track or the external thread and the skirt forming the cam profile or the internal thread. Preferably, the threaded connection sleeve extends in the extension of the skirt. Advantageously, the skirt slides in a sealed manner around the cylindrical body. For example, the internal wall of the skirt can form a lip or an annular rib which comes in sliding sealing contact with the cylindrical body. This dynamic seal is added to that provided between the sleeve and the tube, thus reducing the risk of leakage to zero.

According to another characteristic of the invention, the stopper comprises a tamper-evident ring which cooperates with the insert so as to break the tamper-evident ring, following the screwing of the threaded neck of the bottle into the threaded connection sleeve. The tamper-evident ring can be located at the base of the stopper and breaks in abutment contact against a detent on the insert, when the tightening torque exerted is sufficient.

The invention also defines a method for filling a bottle with a threaded neck by means of a refill of fluid with a stopper, the method comprising the following steps:

a) Engage the threaded connection sleeve of the stopper around the threaded neck of the bottle,

b) Rotate the fluid product refill to screw the threaded connection sleeve around the threaded neck of the bottle, c) Once the threaded connection sleeve is fully screwed around the threaded neck of the bottle, continue to print a torque on the fluid product refill to rotate the flexible bag and the insert around the cap and the bottle, d) Crush the flexible bag to push its contents back into the bottle through the dispensing assembly,

e) Unscrew the fluid product refill from the bottle.

The stopper, initially attached to the insert at the start of screwing, ends up being attached to the bottle at the end of screwing. The user, without even realizing it, deactivates the stopper function, in a simple and unique tightening operation. Of course, it is then necessary that the thread of the stopper is reversed with respect to that of the connection sleeve, in order to achieve, during a simple and even rotation, both a screwing (of the bottle in the sleeve) and unscrewing (of the cap on the insert).

The spirit of the present invention lies at the base in a screwable refill with flexible collapsible pocket. The cap ensures that the refill is completely sealed, as long as it is not screwed onto the bottle.

The invention will now be more fully described with reference to the accompanying drawings, giving, by way of non-limiting examples, several embodiments of the invention.

In the figures:

- Figure 1 is a schematic view showing a fluid product refill of the invention ready to be associated with a bottle of a fluid product dispenser,

- Figure 2 is a vertical cross-sectional view through the refill distribution assembly of Figure 1,

- Figure 3 is a perspective view of the insert of the distribution assembly of Figure 2,

- Figure 4 is similar to that of Figure 2 for an alternative embodiment, and

- Figures 5 and 6 are vertical cross-sectional views through distribution assemblies according to other embodiments, which do not form part of the invention. Reference will firstly be made to FIG. 1 in order to describe very generally the fluid product refill of the invention and its use with a bottle or a fluid product dispenser.

The fluid product refill, designated as a whole by the capital letter R, comprises two constituent elements, namely a flexible bag P and a dispensing assembly D1.

The flexible pouch P is manually crushable and can be made from any suitable material, such as a laminated sheet (aluminum + plastic). The pocket P can also be produced by blowing or by extrusion. The pocket P includes an opening (not shown) in which the distribution assembly D1 is mounted, for example by welding or gluing. As can be seen in Figure 1, the dispenser assembly D1 protrudes out of the flexible pouch P.

The bottle F comprises a neck C which is provided with one or more T thread (s). The bottle F can be made from any suitable material, such as for example glass, metal, a plastic material. , etc. It can be transparent, translucent or opaque. The bottle F may form part of a fluid product dispenser further comprising a dispensing head H comprising a pump K, a push button B and a fixing ring M. The dispensing head H may be mounted by screwing by means of its fixing ring M on the threaded neck C of the bottle F, thus constituting a fluid dispenser. The user, by pressing the push button B, activates the pump K which delivers a dose of fluid through a dispensing orifice B1 formed by the push button B. This is a completely conventional design for a fluid product distributor in the fields of perfumery and cosmetics.

The purpose of the fluid product R refill of the invention is to be able to fill the bottle F with a fluid product dispenser, once the latter is empty. In practice, the dispensing head H is unscrewed from the threaded neck C of the bottle F and a refill of fluid product R according to the invention is attached to the threaded neck C of the bottle F in order to be able to transfer the contents of the flexible bag P into bottle F through the distribution assembly D1. Reference will now be made to FIGS. 2 and 3 to explain in detail the structure and operation of the fluid product refill R of the invention, and more precisely of its dispensing assembly D1.

The distribution assembly D1 comprises two essential constituent elements, namely an insert 1 and a cap 2. These two parts can be made by injection molding of plastic.

The insert 1 comprises a sealing appendage 11, the geometry of which is more clearly shown in Figure 3. The sealing appendix 11 has an eye-shaped or diamond-shaped section. This sealing appendix

January 1 is inserted into the opening of the flexible pouch P and fixed, preferably by heat-welding. The sealing appendage 1 1 internally defines a passage 10. Only the sealing appendix 1 1 penetrates inside the pocket P.

Above the welding appendage 11, the insert 1 forms a cylindrical body 12 through which the passage 10 extends. Externally, this body

12 forms two indentations each comprising an outer cam track 120 and an axial mounting channel 123. The cam track 120 comprises a lower inlet end 121 and a top blind end stop 122. The cam track s' extends arcuate between these two ends 121 and 122. The axial mounting channel 123 extends from the upper end of the body 12 to the inlet end 121 of the cam track 120. This channel 123 includes everything first a funnel section 125 which is extended from below by a rectilinear section which opens into the inlet end 121 of the cam track 120. At the junction between the lower end of the axial duct of assembly 123 and the inlet end 121, there is provided a retaining profile 124, the function of which will be given below.

The insert 1 also comprises a tube 13 which extends axially upwards above the cylindrical body 12. This tube 13 is also traversed by the passage 10 which opens outwards through two lateral openings 130. The tube 13 comprises an annular groove 132 which receives a O-ring 133. The upper end of tube 13 is closed by a small cap 131.

The stopper 2 is engaged around the body 12 and the rod 13 of the insert 1, as can be seen in FIG. 2. This stopper 2 comprises a skirt 21 which extends around the body 12. This skirt 21 forms internally, two cam profiles 210, which may simply be in the form of a small cylindrical lug. In FIG. 2, the cam profiles 210 are positioned at the level of the input ends 121 of the cam tracks 120, below the axial mounting ducts 123. It will now be understood that a drive in rotation of the plug 2 around of the body 12 will cause the movement of the cam profiles 210 along the cam tracks 120, which has the effect of axially moving the plug 2 upwards relative to the insert 1.

The plug 2 also includes a threaded connection sleeve 22 which extends substantially in the extension of the skirt 21. This threaded connection socket 22 internally defines one or more internal helical threads 221. The diameter of the sleeve 22 and the pitch of the thread 221 correspond to those of the threaded neck C of the bottle F. This threaded connection sleeve 22 has the function of being screwed onto the threaded neck C of the bottle F.

The stopper 2 also comprises a plate 24 which extends radially inwardly from the skirt 21 or from the bush 22. At its internal periphery, the plate 24 connects upwards to a sleeve 23 which s 'extends around the tube 13. It can be seen that the O-ring 133 comes into sealed contact with the internal wall of the sleeve 23. The latter also comprises a free upper end 232 which is in sealed engagement with the small cap 131 of the tube. 13. Thus, the passage 10 which extends to the side openings 130 can not communicate with the outside, because of the two sealed annular contacts formed on either side, namely by the O-ring 133 and the 'sealed engagement of the end 132 with the small cap 131. The distribution assembly D1 as shown in FIG. 2 is therefore in its initial closed position. The mounting of the plug 2 on the insert 1 is carried out in a particularly simple manner, given that the engagement of the cam profiles 210 in the cam tracks 120 takes place through the axial mounting channels 123. In practice, it suffices to engage the cam profiles 210 inside the funnels 125, and from there they are guided towards the lower part of the chimneys 123 which leads to the entry of the cam tracks 120. A slight additional axial pressure will be applied. necessary to pass the cam profiles 210 on the other side of the retaining profiles 124, which are located at the entrance of the lower inlet ends 121 of the cam tracks 120.

It may also be noted that the blind ends 122 of the cam tracks 120 serve as an unscrewing end-of-travel stop. In fact, the cam profiles 210 move from the inlet ends 121 to the blind ends 122 against which they will come into abutment, thus marking the complete and final unscrewing of the plug 2.

Returning again to Figure 1, it is understood that the fluid product R refill can be attached upside down above the threaded neck C of the bottle F, so as to engage the threaded sleeve 22 around the threaded neck C. The user grasps the refill R by the flexible pouch P which he drives in rotation, so as to screw the sleeve 22 around the threaded neck C. First, the threaded neck C will penetrate inside the sleeve thread 22 until it comes to the stop of the plate 24. Then, the user can continue to drive the flexible pouch P in rotation, which will have the effect of rotating the flexible pouch P and its insert 1 relative to the stopper 2, which is now integral with the threaded neck C. In doing so, the two cam profiles 210 will be forced to move inside the cam tracks 120, which will have the consequence of breaking the sealed contact between the end 232 of the cuff 23 and the small cap 131 of the tube 13. A fluid communication is then established between the flexible bag P and the bottle F through the passage 10, the side openings 130 and the exit path open between the end 232 and the cap 131. The O-ring 133 prevents any leakage of fluid between the stopper 2 and the insert 1 towards the body 12. Consequently, the user can press or crush the flexible bag P so as to push or push back the fluid that it is. contains in the flask F. The air initially contained in the flask F can escape therefrom, for example through the non-tight threaded plug between the threaded neck C and the threaded sleeve 22. Since the flexible bag is crushable, it is not necessary to replace the volume of its liquid contents with air.

We have thus seen that the simple rotation of the flexible bag P relative to the bottle F generates two successive operations, namely the screwing of the sleeve 22 on the threaded neck C initially, and the unscrewing of the cap 2 relative to to insert 1 in a second step. This sequencing is preferential, but not mandatory. The direction of rotation is preferably single and dextrorotatory.

Optionally, the lower end of the skirt 21 is provided with a tamper-evident (or first-use) ring 216, which is connected to the skirt 21 by breaking bridges. On the other hand, the base of the cylindrical body 12 forms one or more detents 126 which engage with the tamper-evident ring 216, so that the plug 2 is locked in rotation on the insert 1. However, a sufficient torque between the plug and the insert has the effect of breaking the rupture bridges, so as to separate the tamper-evident ring 216 from the skirt 21. The integrity of the rupture bridges indicates to the user that the plug 2 has never been unscrewed from the insert 1. The breaking of the bridges takes place preferably between the operation of screwing the sleeve onto the neck and the operation of unscrewing the cap.

In Figure 4, we see an alternative embodiment, which differs from the first embodiment in terms of the engagement of the skirt 21 'of the plug 2' with the cylindrical body 12 'of the insert T. In fact, at instead of the cam track 120 and the cam profiles 210, an external thread 120 'is provided here at the level of the cylindrical body 12' and a corresponding internal thread 210 'at the level of the internal wall of the skirt 21'. Therefore, the mounting of the plug 2 ’on the insert T can only be done by screwing, and not by pure axial mounting as is the case in the first embodiment.

Another difference from this variant embodiment of FIG. 4 lies in the fact that the skirt 2T internally forms a stop harpoon 21 1 intended to come into abutment below a collar 122 'formed by the cylindrical body 12', in order to limit unscrewing of the cap 2 '. The harpoon 21 1 can pass by force above and beyond the collar 122 'during the assembly operation requiring the screwing of the plug 2' on the insert 1 '. On the other hand, by virtue of its harpoon-shaped configuration, it can no longer disengage from below the collar 122 '.

Optionally, the skirt 21 ’also forms a tamper-evident band 212, which breaks when there is sufficient torque.

In this variant embodiment of Figure 4, the connection socket 22 ′, the tube 13 ’and the sleeve 23’, may be identical to those of the first embodiment. The sealing appendix 1 1 ’is shorter, without modifying its function.

A rotary sliding seal is provided between the tube 13 ’and the sleeve 23’ and preferably also between the cylindrical body 12 ’and the skirt 21’. These seals may be in the form of a lip or of an annular rib which comes into sealing friction contact. An O-ring, like that 133 of the first embodiment, can also be implemented.

A fluid product refill integrating the D2 dispensing assembly is used in exactly the same way as that described above with reference to the D1 dispensing assembly. At the end of the screwing operation, the cap 2 ’is unscrewed from the body 12’ until the stop harpoon 21 1 comes into stop contact below the collar 122 ’. The direction of rotation is preferably single, consecutive and dextrorotatory. Unscrewing the cap follows the screwing of the bottle continuously in a single operation, without the user even realizing it. For him, he simply screws a refill on his bottle: unscrewing the cap is transparent.

In FIG. 5, another embodiment is seen, the operation of which is different from that of the first embodiment. The D3 distribution assembly includes an insert 1 ”which forms a sealing appendage 1 1” which is closed by a cap 1 10. The insert also forms a connection socket 14 which defines an internal thread 141, but also an external thread 144. In other words, the socket 14 is threaded both internally and externally. It can be seen in FIG. 5 that a removable cover 4 is engaged with the threaded sleeve 14. More specifically, this removable cover 4 comprises an upper closure wall 41, as well as a cylindrical wall 42 internally forming a corresponding thread 43. to the thread 144 of the sleeve 14. The cover 4 also comprises a first-use safety ring 44. Thus, the cover 4 is screwed onto the sleeve 14 in a sealed manner.

The dispensing assembly D3 of FIG. 5 also comprises a piercing needle 3 which is engaged inside the sealing appendage 1 1 ”and of the sleeve 14. This piercing needle 3 defines one or more passage ( s) internal (s) 30 and comprises a thrust collar 32, a sealing lip 33 and a bevelled end 31. The support flange 32 is initially disposed inside the sleeve 14, substantially at mid-height. The sealing lip 33 is in a sealed sliding engagement inside the sealing appendage 1 1 ", which may further be provided with an additional sealing bead 1 1 1. The bevelled end 31 is located near or in contact with the cap 110 which closes the lower end of the sealing appendage 11 ". It can thus be said that the drilling needle 3 is arranged inside a closed space, which is defined by the insert 1 "and the removable cover 4.

Although not shown, the dispensing assembly D3 is associated with a flexible bag to constitute a refill of fluid according to the invention. First, the user unscrews the removable cover 4, after having removed the first-use safety strip 44. The dispensing assembly D3 can then be attached upside down on the bottle F in the same manner as shown. in figure 1. The connection sleeve 14 is screwed onto the threaded neck C of the bottle F, which has the effect of moving the piercing needle 3, since it is stressed by the upper edge of the threaded neck C which comes into contact with the flange of thrust 32. Thus, the piercing needle 3 is moved axially towards the cap 110, and will inevitably pierce. A fluid communication is then established between the flexible bag P and the bottle F through the internal passage 30 defined by the piercing needle 3.

In this second embodiment, the screwing of the sleeve 14 around the threaded neck C takes place simultaneously with the movement of the drilling needle 3 inside the insert 1 The risks of leakage are extremely reduced, given that the drilling needle 3 alone ensures the passage between the pocket P and the inside of the threaded neck C. In fact, it can be noted that the thrust collar 32 is set back from the upper end of the needle 3, so that this upper end can penetrate inside the neck C.

In FIG. 6, a third embodiment can be seen, which is particularly simple. The D4 dispensing assembly includes a 1 "" insert which defines a 1 1 "" sealing appendage for a flexible bag not shown. The insert 1 ’” includes a connection socket 14 ’which is threaded internally and externally, as in the previous embodiment. The D4 dispenser assembly also includes a 4 "removable cover which is screwed around the 14" threaded bush.

The user, after removing the removable cover 4 ’, will bring the bottle F upside down on the dispensing assembly D4. Very naturally, the user will rotate the bottle F in order to screw its threaded neck C inside the threaded sleeve 14 ’. Once screwing is complete, the user can reverse the assembly and press the flexible bag P to force the fluid it contains inside the bottle F through the insert T ”. This is a particularly simple design, which however implements a dispensing assembly comprising an internal passage and an internally threaded sleeve adapted to receive by screwing the threaded neck C of the bottle F.

Thanks to the invention, there is a flexible bag fluid refill comprising a dispensing assembly which can easily be connected to the threaded neck of a bottle.

Claims

1 Fluid product refill (R) to fill a bottle (F) provided with a threaded neck (C), the refill (R) comprising:

- a flexible pocket (P) comprising an opening,

- a distribution assembly (D1; D2) comprising a sealing appendage (1 1; 1 1 '), the distribution assembly (R) comprising a threaded connection sleeve (22; 22') forming an internal helical thread ( 221) suitable for screwing on the threaded neck (C) of the bottle (F),

characterized in that the distribution assembly (D1; D2) comprises:

- an insert (1; 1 ’) forming the sealing appendage (1 1; 1 1’), a passage (10), as well as a cam track (120) or an external thread (120 ’),

- a plug (2; 2 ') forming the threaded connection sleeve (22; 22'), as well as a cam profile (210) or an internal thread (210 ') in engagement with the cam track (120) or the external thread (120 '), respectively,

in which the plug (2; 2 ') is initially in tight engagement with the insert (1; 1') so as to close the passage (10), the cam profile (210) or internal thread (210 ') is moving in the cam track (120) or external thread (120 '), following the screwing of the threaded neck (C) of the bottle (F) in the threaded connection sleeve (22; 22'), so as to open the passage (10).

2.- fluid refill (R) according to claim 1, wherein the screwing of the threaded neck (C) of the bottle (F) in the threaded connection sleeve (22; 22 ') and the opening of the passage (10 ) are carried out consecutively in the same direction of screwing, advantageously dextrorotatory.

3.- fluid refill (R) according to claim 1 or 2, wherein the insert (1; 1 ') and the stopper (2; 2') form end-of-travel stop means (122; 122; 122 ', 211) to limit their mutual displacement.

4.- Fluid product refill (R) according to any one of the preceding claims, in which only the sealing appendage (1 1; 1 1 ’) enters the flexible bag (P).

5.- fluid refill (R) according to any one of the preceding claims, wherein the insert (1; 1 ') comprises a tube (13; 13') and the stopper (2; 2 ') comprises a sleeve (23; 23 ') engaged around the tube (13; 13') inside the threaded connection sleeve (22; 22 ').

6.- fluid refill (R) according to claim 5, wherein the sleeve (23; 23 ') slides in a sealed manner around the tube (13; 13') between an initial closed position and a final position of 'opening, after screwing the threaded neck (C) of the bottle (F) in the threaded connection sleeve (22; 22').

7.- fluid refill (R) according to claim 5 or 6, wherein the insert (1; 1 ') comprises a cylindrical body (12; 12') disposed between the sealing appendage (1 1; 11 ') and the tube (13; 13') and the stopper (2; 2 ') comprises a skirt (21; 21') disposed below the threaded connection sleeve (22; 22 ') around the cylindrical body ( 12; 12 '), the cylindrical body (12; 12') forming the cam track (120) or the external thread (120 ') and the skirt (21; 21') forming the cam profile (210) or the internal thread (210 ').

8. A fluid refill (R) according to claim 7, wherein the threaded connection sleeve (22; 22 ’) extends in the extension of the skirt (21; 21’).

9. A fluid refill (R) according to claim 7 or 8, wherein the skirt (21; 21 ’) slides in a sealed manner around the cylindrical body (12; 12’).

10- fluid refill (R) according to any one of the preceding claims, wherein the stopper (2; 2 ') comprises a tamper-evident ring (216; 212) which cooperates with the insert (1; 1') ) so as to break the tamper-evident ring (216; 212), following the screwing of the threaded neck (C) of the bottle (F) in the threaded connection sleeve (22; 22 ').

1 1 .- fluid refill (R) according to any one of the preceding claims, wherein the outer cam path (120) of the insert (1) comprises two ends, namely an inlet end (121 ) connected to an axial mounting chimney (123) and a blind end (122) serving as end stop means, a retaining profile (124) being advantageously formed at the junction of the axial assembly chimney ( 123) with the outer cam track (120) to hold the inner cam profile (210) in the outer cam track (120) and thus prevent it from returning to the axial mounting funnel (123).

12.- fluid refill (R) according to claim 3, wherein the insert (1 ') forms a collar (122') and the stopper (2 ') forms a stop harpoon (21 1) which is fed. forcefully below the flange (122 ') when fitting the plug (2') around the insert (1 '), but can no longer disengage from it.

13.- fluid refill (R) according to any preceding claim, wherein the cam track (120) or the external thread (120 ') of the plug (2; 2') is reversed relative to that of the connection sleeve (22; 22 '), in order to achieve, during a simple and even rotation, both screwing of the bottle (F) into the connection sleeve (22; 22') and unscrewing of the stopper (2; 2 ') on the insert (1; 1') -

14.- A method of filling a bottle (F) with a threaded neck (C) by means of a fluid refill (R) according to any one of the preceding claims, the method comprising the following steps:

a) Engage the threaded connection sleeve (22; 22 ’) of the stopper (2; 2’) around the threaded neck (C) of the bottle (F),

b) Rotate the fluid product refill (R) to screw the threaded connection sleeve (22; 22 ’) around the threaded neck (C) of the bottle (F),

c) Once the threaded connection sleeve (22; 22 ') is fully screwed around the threaded neck (C) of the bottle (F), continue to print a torque on the fluid product refill (R) to rotate the bag flexible (P) and the insert (1; 1 ') around the stopper (2; 2') and the bottle (F),

d) Crush the flexible bag (P) to force its contents back into the bottle through the dispensing assembly (D1; D2), e) Unscrew the fluid product refill (R) from the bottle (F).