EP3889068B1 - Refillable packaging device for a cosmetic product, and associated casing - Google Patents

Description

The present invention relates to the field of refillable packaging devices for cosmetic products. By cosmetic product is meant in particular all products for skin makeup, including lips, and all compositions intended for body application, including so-called care products such as moisturizing creams. It relates in particular to the field of refills for refillable packaging devices for cosmetic products.

A packaging device for a cosmetic product generally refers to any container used to hold a cosmetic product for its preservation, transport, marketing, or use. For example, this refers to pots, bottles, cases, etc. used to hold a cosmetic product.

By refill is meant a removable element comprising a tank adapted to contain a cosmetic product, and which can be put in place and removed from a shell which forms the external surface of the refillable cosmetic product packaging device consisting of a shell and a refill.

Once in place in the shell, the refill must be properly held in the shell. In particular, it is necessary to prevent the refill from escaping from the shell during transport or use, during which the pot may take any orientation, including a complete overturning of the packaging device, whether this results from an intentional action or not. In addition, the refill must not move in the shell when the packaging device is used. The refill must remain fixed when the product is being dispensed, for example when the user takes product from the refill.

However, the refill must be able to be easily removed from the shell for replacement.

Known rechargeable packaging devices generally include systems for holding the refill in the shell which are visible and unsightly, and/or which require industrially complex or costly adaptations.

The document JP2013119399 thus discloses a cosmetic product jar comprising a refill whose tank is of a generally cylindrical shape of revolution and comprises reliefs which slide, by correspondence of shape, in vertical grooves made in the shell of the jar to prevent the tank from rotating.

The document EP0661012 also discloses a refillable pot device, comprising an inner tank or container which engages by shape correspondence in an outer container forming a shell, the inner container being able in particular to comprise a peripheral bead which cooperates with a groove formed inside the neck of the outer container.

The document WO2019058087 also discloses a refillable pot device of similar configuration, comprising an inner tank or container which engages by form correspondence in an outer container forming a shell, the shell comprising a peripheral bead which cooperates with a groove formed on the outer surface of the tank. The upper part of the shell has a neck comprising slots in which radial beads of the tank are introduced to allow the latter to be held in rotation.

The document JP2012250733 relates to a bottle comprising an inner ceramic part forming a reservoir and an outer plastic part. The inner part and the outer part are linked by interposing between them an elastic layer making it possible to compensate for dimensional variations between these two parts.

Thus, the refillable packaging devices known in the prior art are based on a shape correspondence between the shell and the refill, which allows for example by clipping (or other relative mechanical engagement) the refill to be held in the shell. This requires a particular conformation of the shell and the refill, which prevents for example the use of a shell of conventional shape, such as a standard glass container, to form a refillable packaging device, and, similarly, prevents the use of a refill in the form of a tank of conventional shape, for example a tank made of glass or stainless steel of conventional shape.

The invention aims to solve all or part of the aforementioned problems.

Thus, the invention relates to a shell for a refillable cosmetic product packaging device. The shell is adapted to receive a refill adapted to contain said cosmetic product. The shell comprises an opening adapted to receive the refill in order to place it in a receiving volume defined by an inner wall of the shell. The inner wall of the shell has, on at least part of its surface, an element made of elastomeric material bonded to the shell and which is at least partly in relief with respect to said surface of the inner wall of the shell.

The shell thus formed is able to maintain a refill of suitable shape, thanks to the reliefs of elastomeric material formed on the inner wall of the shell. The hold obtained, while still allowing the refill to be extracted, uses the elastic properties and the coefficient of friction of the elastomeric material. The implementation of the refill is thus very simple.

The elastomeric material element can be overmolded onto the hull.

The shell may be formed from a plastic material. The shell and the elastomeric material element it presents may be formed together by bi-material injection. The shell may thus be produced by known and controlled industrial processes, which provide good cohesion between the shell and the elastomeric material element it carries.

The elastomeric material used may be a thermoplastic elastomer or a silicone elastomer. It may have a hardness of between 20 degrees shore and 80 degrees shore, and preferably between 40 degrees shore and 60 degrees shore.

The elastomeric material used and its hardness allow it to be deformed under reasonable stress, compatible with the application to a cosmetic product refill. The elastomeric element can extend along one or more strips parallel to the opening of the shell.

The elastomeric material element can form discrete studs distributed over the surface of the inner wall of the hull.

The element made of elastomeric material can form at least two pads and preferably at least three pads distributed over a periphery of the surface of the inner wall of the shell.

Different configurations of the elastomeric material element make it possible to adapt the support areas to the application, the maintenance of the refill, the holding force, the aesthetics, the complexity of implementation, etc.

In such a shell, the receiving volume may be generally cylindrical in shape, or truncated cone-shaped, or right prismatic.

These are configurations that are particularly suitable for implementing the invention. A portion of the inner wall of the shell may form a neck near the opening of the shell, and the element made of elastomeric material may then be located on the surface portion of the inner wall of the shell forming the neck.

The shell can be made of plastic, glass, stainless steel, aluminum, or wood, for example. The shell has an aesthetic aspect that can be essential in the field of cosmetic products.

The invention also relates to a packaging device for a cosmetic product comprising a shell as previously defined and a refill. in which the refill comprises a side wall having a clearance with respect to the inner wall of the shell, except at the level of all or part of the element made of elastomeric material, so that support zones of the element made of elastomeric material on said side wall of the refill are formed.

Since the refill is held in place in the shell in support areas, the means enabling this hold can be invisible (if the shell is opaque) or at least very discreet, so that they do not detract from the aesthetics of the pot which is formed.

The element made of elastomeric material can be deformed in said support zones by compression on the side wall of the refill, compared to a configuration that the element made of elastomeric material adopts in the absence of external stresses.

The deformation of the elastomeric material element on the support areas increases the force it exerts on the inner surface of the shell, and thus increases the friction which opposes the extraction of the refill.

In one embodiment, the side wall of the refill is free of asperities such as grooves, holes, pins or snap rings.

Not being based on a principle of snap-fastening or screwing, or other engagement of an element in an element of corresponding shape, the maintenance of the refill does not require forming on it any particular shape intended to cooperate with means of maintaining the shell.

In a packaging device as defined above, the refill tank of which is filled with a cosmetic product, the shell and the refill may be configured such that a force required for extracting the refill is greater than or equal to twice, and preferably greater than or equal to two and a half times, the weight of the refill. In particular, the shape, dimensions and composition of the element made of elastomeric material are configured such as to obtain the force required for extracting the desired refill.

This holding force allows relatively easy removal of the refill for replacement. It corresponds to a desirable specification for conventional cosmetic product pots.

The packaging device may in particular be a pot, for example a pot of cream.

Other features and advantages of the invention will become apparent in the description below.

• la figure 1 représente, selon une vue tridimensionnelle, un premier exemple d'une recharge pouvant être mise en oeuvre dans un dispositif de conditionnement d'un produit cosmétique conforme à un mode de réalisation de l'invention ;
• la figure 2 représente, selon une vue tridimensionnelle, un premier exemple d'une coque pour dispositif de conditionnement de produit cosmétique rechargeable selon un premier exemple de mode de réalisation de l'invention ;
• la figure 3 représente, selon une vue tridimensionnelle, une coque selon un deuxième exemple de mode de réalisation de l'invention ;
• la figure 4 représente, selon une vue tridimensionnelle, une coque selon un troisième exemple de mode de réalisation de l'invention ;
• la figure 5 représente, selon une vue en coupe, un dispositif de conditionnement pour produit cosmétique, à savoir un pot, formé de la coque de la figure 2 et de la recharge de la figure 1 ;
• la figure 6 représente, selon une vue partielle en coupe, l'interaction entre la coque et la recharge dans le dispositif de conditionnement de la figure 5 ;

In the attached drawings, given as non-limiting examples:

• there figure 1 represents, in a three-dimensional view, a first example of a refill that can be implemented in a device for packaging a cosmetic product in accordance with an embodiment of the invention;
• there figure 2 represents, in a three-dimensional view, a first example of a shell for a refillable cosmetic product packaging device according to a first exemplary embodiment of the invention;
• there figure 3 represents, in a three-dimensional view, a hull according to a second exemplary embodiment of the invention;
• there figure 4 represents, in a three-dimensional view, a hull according to a third exemplary embodiment of the invention;
• there figure 5 represents, in a sectional view, a packaging device for a cosmetic product, namely a pot, formed from the shell of the figure 2 and recharging the figure 1 ;
• there figure 6 represents, in a partial sectional view, the interaction between the shell and the refill in the packaging device of the figure 5 ;

There figure 1 represents, in a three-dimensional view, a first example of a refill 1 suitable for use in a refillable cosmetic product packaging device according to one embodiment of the invention.

The refill 1 comprises a tank 2 which is hollow, that is to say whose shape provides a volume suitable for receiving a cosmetic product. In the example shown here, the tank 2 has a generally cylindrical shape, which may be straight or slightly flared (in a truncated cone). Any hollow shape may nevertheless be envisaged to form the tank, in particular any straight prismatic shape, in particular having a square, rectangular, pentagonal, hexagonal, octagonal base, etc.

The tank 2 has in particular a side wall 3 and a bottom 4.

The tank comprises, in the example shown, an upper rim 5. The rim 5 is formed around an open face 6 of the tank 2.

A cosmetic product, for example a cream, may be contained in the volume provided inside the tank. The open face of the tank may be covered with a removable cap, for example a product protection disc, for example resting on the rim 5 and/or on a shoulder formed in the upper part of the tank. The tank may also include a cover, for example heat-sealed, covering the open face 6 and having to be removed when the refill is used for the first time. The open face may be free, directly exposing the product contained in tank 2 of the refill, or be equipped with a regulating device such as a sieve, a net, or other device adapted to the product to be distributed.

The refill thus has a simple, classic shape.

In this case the refill, and in particular its side wall 3 and more particularly the external surface 7 of this side wall 3, is devoid of roughness or other means of snapping.

By asperity is meant a volume, relief or hollow, formed on a surface and of dimensions much greater than any roughness linked to the material constituting said surface. The side wall surface 3 does not in particular have any groove, any orifice, any pin or any snap ring.

The refill can thus be easily produced, or can consist of a standard container, for example a plastic, glass, or stainless steel jar.

It is possible to use as a refill a pre-existing container, for example a conventional glass container, without adaptation, as a refill for a cosmetic product packaging device.

The manufacturing cost of the tank (and ultimately of the packaging device) can thus be reduced, compared to packaging devices whose tank must include specific fixing elements in a shell.

There figure 2 represents an example of a shell 8 which can be used to form a packaging device for a cosmetic product (in this case a pot) with a refill 1 in accordance with the invention, for example the refill of the figure 1 . The shell designates an element adapted to receive a refill and in which the refill will be held. The shell of the figure 2 is a bottle forming a receiving volume suitable for receiving the refill 1 through an opening 9.

The shell 8 comprises a main body 10, of substantially prismatic shape with a square base, the side faces of which have a slight convexity. The shell 8 constituting a visible part of the pot once the latter is formed, it has an important aesthetic function. The main body 10 of the shell 8 is surmounted by a neck 11 provided with a screw thread 12 allowing the installation of a screw cap (not shown).

A shoulder 13 is formed at the mouth of the neck 11. The shoulder 13 is sized so as to be able to receive the rim 5 of the tank 2 of the refill 1 as support.

The shoulder 13 is optional, the refill being able to take vertical support on other surfaces of the hull, for example the edge 5 of the tank 2 of the refill 1 can bear directly on the neck 11, or for example in the absence of a rim 5 on the tank 2 of the refill, the bottom 4 of the tank can bear on a bottom of the shell, if the latter has a bottom. A shell 8 without a bottom can be advantageous for facilitating the extraction of the refill.

The shell has, on its inner wall 14, an element made of elastomeric material 15. The element made of elastomeric material 15 is intimately connected to the shell. Typically, the element made of elastomeric material can be overmolded on the shell 8. Overmolding of the element made of elastomeric material 15 on the shell 8 is possible in particular on a shell 8 made of a plastic material, metal, glass, or another material compatible with overmolding.

When the shell 8 is made of a plastic material, the elastomeric material element 15 and the shell 8 can be formed by two-material injection.

The elastomeric materials that can be used to form the elastomeric material element include all thermoplastic elastomers (TPEs) as well as silicone elastomers. The materials that can be used advantageously have a shore hardness of between 20 shore degrees and 80 shore degrees (preferably between 40 and 60 shore degrees).

The hardness of the material used is an important parameter for optimizing the refill, and is chosen in particular according to the dimensions of the refill tank and according to the material used to form the shell intended to receive the refill to form a packaging device for cosmetic products.

The elastomeric material element 15 is in relief with respect to the inner wall 14 of the shell 8.

In other words, on at least part of the elastomeric material element 15, the latter projects relative to the inner wall 14.

Studs 16 can thus be formed by the elastomeric material element 15. These studs 16 form the parts of the elastomeric material element having a function of maintaining the refill 1 in the receiving volume, as detailed below.

The number, dimensions, shape, and orientation of the studs 16 may vary depending on the application considered. More generally, the configurations that can be envisaged for the element made of elastomeric material are numerous.

According to a first configuration, represented in the figure 2 , the elastomeric material element 15 forms a peripheral strip on the inner wall 14.

This strip is formed in the upper part of the tank 2, in this case under the rim 5. This strip comprises three studs 16, distributed along the periphery of the inner wall 14 carrying said strip.

With the exception of the studs 16 which are necessarily in relief with respect to the inner wall 14 of the shell 8, the remainder of the element made of elastomeric material 15 may be in relief or flush with the inner wall 14.

For this, a groove can be formed in the inner wall 14 to accommodate said element made of elastomeric material 15.

The distribution of the three pads 16 is preferably regular, that is to say that the pads are equidistant along the strip formed by the element made of elastomeric material 15.

In the case of a shell whose opening 9, typically defined by the neck 11, has a shape of revolution, this results in a regular angular distribution of the studs 16 with respect to the axis of revolution of the opening 9 of the neck 11.

In this embodiment, the studs 16 have a vertical arrangement, that is to say that they form a relief having an elongated shape from the top (opening of the neck 11 of the shell 8) to the bottom (bottom of the shell 8 if said shell has a bottom).

More generally, the studs are oriented perpendicular to a plane materialized by the opening 9 of the shell provided for the introduction of the refill 1. In this embodiment, the number of studs formed by the element made of elastomeric material can be easily adapted, with few modifications in the production tools.

According to a variant of this embodiment, the element made of elastomeric material 15 is formed of several pads 16 without them being linked together by a strip of elastomeric material.

There figure 3 represents, in a three-dimensional view, a shell 8 according to a second exemplary embodiment of the invention. The embodiment of the figure 3 is essentially identical to that of the figure 2 , so that the description of the figure 1 applies thereto, with the exception of the configuration of the elastomeric material element 15. In this case, the elastomeric material element 15 has the shape of two parallel strips, in relief opposite the inner wall 14 of the shell.

Many other configurations of the elastomeric material element 15 are conceivable, for example a single strip in relief opposite the inner wall 14 of the shell, a zig-zag or undulating strip, a combination of one or more strips and studs 16, etc.

There figure 4 represents, in a three-dimensional view, a shell 8 according to a third exemplary embodiment of the invention. This embodiment is essentially identical to that of the figure 1 , so that the description applies thereto, except for the shape of the interior volume of the hull. The embodiment of the figure 4 illustrates that a perfect match of shape between the receiving volume of the refill and the shape of the refill is not necessary over the entire surface of the refill to ensure the maintenance described in Figures 5 and 6 . In the example of a shell shown here, the inner wall of the shell 14 forms a neck near the opening 9 of the shell. Under the neck 11, the receiving volume flares out. The shell thus has the shape of a conventional pot or bottle, in which the section of the internal volume of the pot is greater than that of its opening 9. The element made of elastomeric material 15 is located on the portion of the inner wall of the shell forming the neck 11. The refill 1 will thus be held in the shell 8 only at the neck 11.

The hulls represented in the Figures 2 to 4 may be formed (except for the element made of elastomeric material) formed of various materials. For example, the shell may be formed of glass. Any shade of glass may be used, including transparent, translucent, opaque, colored or not.

The shell can be made of many other materials, depending on the desired appearance, volume, shape, desired closing method, etc. In particular, the shell can be made of plastic, wood, metal (such as stainless steel, tinplate, or aluminum).

There figure 5 represents, in a sectional view, a packaging device, namely a pot, formed from the shell of the figure 2 and recharging the figure 1 . The section plane is a diametrical plane of the hull 8, as shown in the figure 2 to 4 (plan P).

The pot shown in Fig. 5 thus comprises a shell 8, in the form of a thick-walled container, which forms a receiving volume in which the refill 1 is received. In the example shown, the shape of the internal volume of the shell 8 thus corresponds, to a clearance, to the external shape of the tank 2 (for example cylindrical or slightly truncated). The depth of this volume is slightly greater than the overall height of the refill 1, so that the rim 5 of the refill rests on the shoulder 13 formed at the mouth of the neck 11.

There figure 6 represents a detailed view of the interaction between the shell 8 and the refill 1 in the pot of the figure 5 , according to the same cutting plane as that of the figure 5 .

There figure 6 reveals in particular the support formed between the edge 5 and the shoulder 13 of the shell 8.

A clearance J, for example of the order of 0.5 mm for a cosmetic cream jar of classic volume, for example of the order of 60 mL, exists between the inner wall 14 of the shell 8 and the outer surface 7 of the side wall 3 of the tank 2.

The element made of elastomeric material 15 is arranged in the example shown flush or almost flush with the surface of the inner wall 14 of the shell 8 of the studs 16 that it forms and which are in relief, projecting, with respect to this inner wall 14. Each stud 16 forms a projection with respect to the level of the inner wall 14 with a thickness E greater than the clearance J, when the stud is not subjected to an external mechanical stress, in particular when the stud 16 is not deformed by compression.

This free configuration of plot 16 is shown in dotted lines at figure 6 . In the example shown, the thickness E can be of the order of 1 mm, for example of the order of 0.9 mm.

In order to introduce the refill 1 into the shell 8 until the edge 5 rests on the shoulder 13, it is necessary to deform the stud 16 to allow the introduction of the refill 1 into the shell 8.

When the refill 1 is in the shell 8, the stud 16 is compressed and therefore has a thickness equal to the clearance J. The stud 16 thus fills the clearance J and exerts, due to its elasticity, a support force on the side wall 3 of the tank 2 of the refill 1.

There are advantageously several support pads distributed around the tank 2, so as to distribute the supports on its side wall 3, and ensure effective and uniform support of the tank 2 in the shell 8.

Indeed, each support zone, formed at each stud 16, forms a zone ensuring maintenance of the tank 2 (and therefore of the refill 1) in the shell 8. When a force tending to extract the refill 1 from the shell 8 is exerted, a force opposing its extraction is created, by reaction, at the studs, due to the interaction between each stud 16 and the side wall 3 of the refill 1 on which the studs 16 are compressed. This force is generated by friction of the stud 16 on the internal wall of the shell 18.

As long as the tank 2 is stationary in the shell 8, this is a so-called dry friction force, the intensity of which is, for each pad 16, at most equal to the coefficient of static friction between the pads 16 multiplied by the force exerted between the inner wall 14 of the shell 8 and the pad 16 due to its compression. When the force tending to extract the tank of the hull 8 exceeds the sum of the maximum static friction forces exerted at the level of the pads 16, the refill 1 begins to move with respect to the hull 8 for its extraction.

It thus appears that the number of studs, their dimensions, the elastomeric material used, as well as the material constituting the tank 2 and the external surface condition 7 of the side wall 3 of the tank are parameters which make it possible to modulate the force necessary for the installation and extraction of the refill 1.

With regard to the element made of elastomeric material, the material constituting it, the total support surface (sum of the support surfaces) between said element made of elastomeric material and the external surface 7 of the side wall 3 of the tank, and the sum of the forces exerted due to the compression of said element made of elastomeric material are determining parameters when determining the configuration of the element made of elastomeric material.

Whatever the embodiment considered, it is advisable, for a cosmetic product jar, that the force required to extract the refill be at least twice the weight of the full refill, for example of the order of two and a half times the weight of the full refill.

The presence of at least three regularly distributed studs, as in the example shown, also allows the centering of the refill in the shell 8.

In order to facilitate the installation of the refill 1 in the shell 8, the pads 16 have, in the example of the figure 6 , a curved, beveled or chamfered shape in the so-called vertical direction which also corresponds to the direction of introduction (and extraction) of the refill, which allows progressive compression of the studs when inserting the refill 1 into the shell 8.

The studs 16 have, in the example shown, a vertically elongated shape, that is to say parallel to the direction of introduction and extraction of the refill. In order to facilitate the introduction of the refill 1 into the shell 8, a chamfer 17 is formed on the stud 16.

Although described with the support of three detailed embodiments, the present invention is obviously not limited to these embodiments. In particular, the respective configuration of the elastomeric element, the refill and/or the shell may be very different from the configurations described above. For example, the presence of studs on the element made of elastomeric material is optional, since at least a portion of said element made of elastomeric material is in relief relative to the inner wall. of the hull. Very varied shapes of elements in elastomeric material are possible.

Several distinct elastomeric material elements can be present on the same hull.

The tank may have various shapes and constitutions, depending on the application considered. Similarly, the shell may have various shapes and constitutions. For example, the tank may be cubic, cylindrical, cubic or parallelepiped, spherical, and may or may not have a bottom, or be provided with an orifice in its bottom to facilitate the extraction of a refill.

The invention thus developed allows the removable maintenance of a cosmetic product refill in a shell in order to form an aesthetic and refillable cosmetic product packaging device by exchanging the refill. The maintenance is obtained by friction of the element made of elastomeric material on an external surface of a wall of the refill. The maintenance means, in particular the elastomeric element, can be completely invisible once the pot is formed, and be barely visible in the shell.

Furthermore, the refill can have a simple shape to produce, since the external surface of the refill tank which is intended to interact with the elastomeric material element of the shell for holding the refill does not require the formation of any particular mechanical device. A pre-existing container, for example a conventional glassware container, a simple plastic tank, metal tank, etc. can thus be used without adaptation as a tank of the refill of the cosmetic product packaging device.

Claims (14)

1. Casing for a device for packaging a refillable cosmetic product, said casing (8) being suitable for receiving a refill (1) suitable for containing said cosmetic product,

   the casing (8) comprising an opening (9) suitable for receiving the refill so that it can be set in place in a receiving volume defined by an interior wall (14) of the casing,

   said interior wall (14) having, over at least part of its surface, an elastomer element (15) that is at least partly in relief with respect to the interior wall (14) of the casing (8),

   characterized in that the elastomer element is connected to the casing (8) and in that, with a portion of the interior wall (14) of the casing (8) forming a neck (11) near the opening (9) of the casing (8), the elastomer element (15) is situated on that portion of the interior wall (14) of the casing (8) that forms the neck (11).
2. Casing according to Claim 1, wherein the elastomer element (15) is overmoulded on the casing (8).
3. Casing according to Claim 1, the casing (8) being made of a plastics material, wherein said casing (8) and the elastomer element (15) that it exhibits are formed together by two-shot injection moulding.
4. Casing according to one of the preceding claims, wherein the elastomer is a thermoplastic elastomer or a silicone elastomer.
5. Casing according to one of the preceding claims, wherein the elastomer has a degree of hardness of between 20 and 80 on the Shore scale, and preferably a degree of hardness of between 40 and 60 on the Shore scale.
6. Casing according to one of the preceding claims, wherein the elastomer element extends in the form of one or more strips parallel to the opening (9) of the casing.
7. Casing according to one of the preceding claims, wherein the elastomer element forms discrete pads (16) distributed over the surface of the interior wall of the casing.
8. Casing according to Claim 6, wherein the elastomer element (15) forms at least two pads (16) and preferably at least three pads (16) distributed over a periphery of the surface of the interior wall of the casing.
9. Casing according to one of the preceding claims, said receiving volume having the overall shape of a cylinder of revolution, of a cone frustum, or of a right prism.
10. Casing according to one of Claims 1, 2, 4, 5, 6, 7, 8 and 9, said casing (8) being made of plastic, of glass, of stainless steel, of aluminium or of wood.
11. Packaging device for a cosmetic product comprising a casing (8) according to any one of the preceding claims and a refill (1), wherein the refill (1) has a lateral wall (3) that leaves a clearance (J) with respect to the interior wall (14) of the casing (8) except at all or part of the elastomer element (15), so that bearing zones where the elastomer element (15) bears against said lateral wall (3) of the refill are formed.
12. Packaging device for a cosmetic product according to Claim 11, wherein the elastomer element (15) is deformed in said bearing zones by compression against the lateral wall (3) of the refill (1) in comparison with a configuration that the elastomer element (15) adopts in the absence of external influence.
13. Packaging device according to Claim 11 or Claim 12, wherein said lateral wall (3) of the refill (1) is free of roughnesses such as grooves, orifices, pins or rings for clip-fastening.
14. Packaging device according to one of Claims 11 to 13, the shape, the dimensions and the constitution of the elastomer element being configured so that the force needed to extract the refill (1) from the casing (8) is greater than or equal to twice, and preferably greater than or equal to two and a half times, the weight of the refill (1).

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