EP2301379A1 - Packaging and application device for a cosmetic or dermatological product - Google Patents

Abstract

The device has a container (2) for containing a cosmetic and/or dermatological product (P). An applicator (1) has an applicator element (6) axially extending a rod (5). A plastic tip (9) covers a distal part of the applicator element, where the tip is made of elastomer. The tip has a core covered by asperities. The asperities laterally define another cover having a transverse dimension higher than or equal to nominal transverse dimension of the rod.

Description

TECHNICAL FIELD OF THE INVENTION

The present invention relates to devices for packaging and applying a cosmetic or dermatological product, and more particularly a device for packaging and applying a mascara.

STATE OF THE PRIOR ART

The use of mascara is more and more widespread to enhance the lashes and beautify the eyes. The mascara must make it possible to color the eyelashes or to cure them, but also to lengthen them or to shape them, for example by separating them and bending them. For this, the texture of the mascara itself is of course important, but an essential element in the application of mascara is the mascara applicator.

In recent years, mascara manufacturers have developed mascara applicators with a brush-shaped applicator element and a mouthpiece. Such applicators are for example described in the documents FR2470556 or JP2005087635 . These applicators with tips are particularly advantageous because they allow not only to distribute mascara on all the eyelashes with their brush-shaped core, but also to make up the ends of the eyelashes with their tip.

However, on these tips, the mascara tends to accumulate, which can lead to the formation of packages on the eyelashes when the tip comes into contact with the eyelashes. In addition, the presence of the tip reduces the surface of the brush-shaped core and thus the mascara laying surface on all the eyelashes, which can lead to an inhomogeneous distribution of the mascara on the eyelashes.

In the document EP 0 875 169 is described a mascara applicator having a first application zone consisting of a support having a symmetry of revolution about an axis, having a plurality of reliefs or asperities on at least a portion of its surface, so as to retain a makeup product on the surface and to restore it to a surface to be treated, and a second zone to application, adjacent to the first, and consisting at least in part of a material capable of pumping the product at depth, and / or natural or synthetic fibers. This second part is part of a cylindrical envelope having a larger diameter, measured relative to the axis of symmetry of the first part, which is smaller than the diameter of the first part. There is therefore also a risk of accumulation of product at the end of the applicator.

SUMMARY OF THE INVENTION

The invention aims to overcome the disadvantages of the state of the art related to the presence of the tip while retaining the advantages that the tip.

• un récipient contenant le produit cosmétique et/ou dermatologique, le récipient comportant un organe d'essorage;
• un applicateur comportant :
  • une tige, la tige présentant une section transversale complémentaire de celle de l'organe d'essorage de façon à ce que la tige coulisse à travers l'organe d'essorage, la tige présentant une dimension transversale D1;
  • un élément applicateur prolongeant axialement la tige et s'étendant longitudinalement sur une longueur L2, l'élément applicateur comportant une partie proximale proche de la tige et une partie distale éloignée de la tige,
  • un embout en matière plastique recouvrant la partie distale de l'élément applicateur, l'embout comportant un noyau recouvert par des aspérités, le noyau étant géométriquement compris à l'intérieur d'une première enveloppe cylindrique de diamètre D3 et de longueur L3 tels que 0.4D1<D3<0.99D1 et 0.05L2<L3<0.5L2 et les aspérités délimitant latéralement une seconde enveloppe présentant au moins une dimension transversale D4 supérieure ou égale à la dimension transversale nominale D1 de la tige.

More specifically, the invention relates to a device for applying and conditioning a cosmetic and / or dermatological product comprising:

• a container containing the cosmetic and / or dermatological product, the container comprising a wiper member;
• an applicator comprising:
  • a rod, the rod having a cross section complementary to that of the wiper member so that the rod slides through the wiper member, the rod having a transverse dimension D1;
  • an applicator element axially extending the rod and extending longitudinally on a length L2, the applicator element having a proximal portion close to the stem and a distal portion remote from the stem,
  • a plastic tip covering the distal portion of the applicator element, the tip comprising a core covered by asperities, the core being geometrically contained within a first cylindrical envelope of diameter D3 and length L3 such that 0.4D1 <D3 <0.99D1 and 0.05L2 <L3 <0.5L2 and the asperities delimiting laterally a second envelope having at least one transverse dimension D4 greater than or equal to the nominal transverse dimension D1 of the rod.

In this document, a dimension or element of "longitudinal", "length" or "axial" when it extends parallel to an axis defined by the stem and qualifies a dimension or element of "transverse" is qualified. when it extends perpendicularly to this axis defined by the rod.

When we speak of a "transverse dimension", when the object is asymmetrical, we designate the largest transverse dimension.

Advantageously, the second envelope is cylindrical and in this case, the transverse dimension D4 is equal to the diameter of the cylinder.

The core is geometrically contained in a first cylindrical envelope, which means that the nucleus can have any shape as long as it is entirely included in this envelope. However, in a preferred embodiment, the core laterally delimits a first cylindrical shell, which means that it has a plurality of projecting points or ridges which, if laterally connected, define a cylindrical envelope. Cases where the core is of circular or cylindrical section are included in these geometric definitions of the core.

Similarly, the fact that the asperities laterally delimit a second envelope, means that the asperities that are most protruding define, if they are laterally connected, an envelope. This envelope is preferably cylindrical or conical, but it can also be asymmetrical. For example, the asperities can be pins that have different lengths from each other: it can thus be envisaged to make combs of pins on each side of the core in order to comb the eyelashes in places. A second cylindrical envelope facilitates the manufacture of the tip.

The device according to the invention is particularly advantageous because its dimensions allow optimal extraction of the tip.

Indeed, the core is included in an envelope which has a diameter less than 0.99 times the transverse dimensions of the rod, which allows the core to slide through the wiper member without contact with the wiper member. Consequently, a minimum amount of cosmetic and / or dermatological product remains on the core, which makes it possible to have a sufficiently loaded core of cosmetic and / or dermatological product to allow uniform application of the product to the ends of the eyelashes. Furthermore, the asperities delimit laterally a second envelope having a transverse dimension D4 greater than or equal to the nominal transverse dimension D1 of the rod, which ensures that at least a portion of the asperities comes into contact with the wiper member when the The tip passes through the wiper member and, consequently, the cosmetic and / or dermatological residual product that was carried by the asperities is wrung out by the wiper member during the passage of the nozzle into the nozzle. wringing member. In this way, the packages of cosmetic and / or dermatological product on the eyelashes are avoided.

Moreover, the core preferably has transverse dimensions greater than 0.4 times the transverse dimension of the rod, which makes it possible on the one hand to facilitate the manufacture of the core and the assembly of the tip on the distal end of the core. applicator element, and secondly to prevent the tip is too loaded cosmetic product and / or dermatological: indeed if the core is too small and the asperities too deep compared to the size of the core, a large amount of cosmetic and / or dermatological product will be stored on the surface of the core, which will promote the formation of cosmetic product package on the surface of the eyelashes.

For this purpose, in a preferred embodiment, the core has a transverse dimension greater than 0.7 times the transverse dimension of the rod.

The wiper member may be a simple plastic ring, elastically deformable or not, which is mounted in the neck of the container, or it may be a more complex device through which the applicator passes. Such dewatering members are known from the prior art and described for example in the document FR2919586 .

Furthermore, the device according to the invention makes it possible to solve another disadvantage of the state of the art by proposing a tip whose longitudinal dimensions are chosen so that the applicator element has a sufficiently large application surface per square meter. compared to that of the tip so that the cosmetic and / or dermatological product is homogeneously deposited on all the eyelashes.

For this purpose, the core has, in a particularly advantageous embodiment, a length L3 such that 0.2L2 <L3 <0.5L2.

Advantageously, the applicator element consists of a central longitudinal core around which a brush is wound, which allows the users of the device to be able to rotate the applicator element against the eyelash in order to have a more homogeneous application of the cosmetic product. The longitudinal core is preferably made of a steel-type metal, while the brush is preferably made of bundles of bristles, which may consist of elastically deformable plastic, for example nylon fiber, solid or hollow. The brush has a twist shape.

Advantageously, the brush has a diameter D2 greater than the transverse dimension of the rod D1 so that, when the applicator passes through the wiper member, the brush comes into contact with the wiper member so as to wring the brush.

• les aspérités de l'embout et la brosse de l'élément applicateur peuvent être réalisés dans un plastique déformable élastiquement, tandis que l'organe d'essorage est réalisé dans un matériau rigide, de façon à ce que les aspérités de l'embout et la brosse de l'élément applicateur se déforment au passage de l'organe d'essorage ; ce mode de réalisation est particulièrement avantageux car il permet un très bon essorage de l'applicateur et il est simple à fabriquer, ou
• les aspérités de l'embout et la brosse de l'élément applicateur peuvent être réalisés dans un matériau rigide, tandis que l'organe d'essorage est réalisé dans un matériau déformable élastiquement, de façon à ce que l'organe d'essorage se déforme au passage de l'applicateur ; ce mode de réalisation est également avantageux car il permet de limiter les résidus de produit cosmétique et/ou dermatologique sur l'organe d'essorage.

According to different embodiments:

• the asperities of the tip and the brush of the applicator element may be made of an elastically deformable plastic, while the wiper member is made of a rigid material, so that the asperities of the tip and the brush of the applicator element deforms as the wiper member passes; this embodiment is particularly advantageous because it allows a very good wringing of the applicator and is simple to manufacture, or
• the asperities of the tip and the brush of the applicator element may be made of a rigid material, while the wiper member is made of an elastically deformable material, so that the wiper member is deforms as the applicator passes; this embodiment is also advantageous because it makes it possible to limit the residues of cosmetic and / or dermatological product on the wiper member.

Moreover, the rod is preferably cylindrical and without this case, the transverse dimension D1 of the rod is equal to the diameter of the rod. This embodiment facilitates the manufacture of the brush.

• le noyau peut être constitué d'une partie proximale cylindrique et d'une partie distale hémisphérique, ce qui permet à l'utilisateur d'utiliser son applicateur sans se préoccuper de son sens ; ou
• le noyau peut être constitué d'une partie proximale de section transversale hexagonale et d'une partie distale hémisphérique, ce qui permet à l'utilisateur de bénéficier d'arêtes tout autour de l'embout afin de pouvoir étaler plus précisément le produit cosmétique.

According to different embodiments:

• the core may consist of a cylindrical proximal portion and a hemispherical distal portion, which allows the user to use his applicator without regard to its meaning; or
• the core may consist of a proximal portion of hexagonal cross section and a hemispherical distal portion, which allows the user to benefit from ridges all around the tip in order to be able to more accurately spread the cosmetic product.

Advantageously, only the proximal portion of the core is covered with asperities, the distal portion of the core being smooth, which limits the risk of injury to the user.

According to a particularly advantageous embodiment, the tip consists of a part formed by injection.

Advantageously, the asperities of the tip are constituted by elastically deformable pins, which allows a better application of the cosmetic and / or dermatological product on eyelashes of small sizes.

Advantageously, the pins have different lengths.

• les picots peuvent avoir tous la même longueur, ce qui facilite leur fabrication ;
• les picots peuvent avoir des longueurs différentes : les picots peuvent par exemple être répartis en lignes s'étendant longitudinalement, les picots de certaines lignes étant plus longs que les picots des autres lignes, ce qui permet un maquillage plus précis.

According to different embodiments:

• the pins can all have the same length, which facilitates their manufacture;
• the pins may have different lengths: the pins may for example be distributed in lines extending longitudinally, the pins of some lines being longer than the pins of the other lines, allowing a more precise makeup.

• l'embout est surmoulé sur l'élément applicateur, ce qui permet de réduire le jeu entre l'élément applicateur et l'embout. En outre, cela permet une meilleure répétabilité du montage de l'embout sur l'élément applicateur. Par ailleurs, ce montage est adapté pour toutes les tailles d'embout et d'élément applicateur et il permet une meilleure tenue dans le temps de l'embout sur l'élément applicateur ; ce mode de réalisation est donc le mode préféré de réalisation de l'invention puisqu'il évite les risques que l'embout se détache de l'élément applicateur qui pourrait alors blesser l'utilisateur.
• l'embout est emmanché à chaud sur l'élément applicateur. Ce type d'assemblage est plus simple que le précédent, bien maîtrisé.
• l'embout est assemblé à froid sur l'élément applicateur, ce qui permet de travailler avec des tailles d'embout et d'élément applicateur variées.

According to different embodiments:

• the tip is overmolded on the applicator element, which reduces the clearance between the applicator element and the tip. In addition, this allows a better repeatability of the mounting of the tip on the applicator element. By Moreover, this assembly is suitable for all sizes of tip and applicator element and it allows a better durability of the tip on the applicator element; this embodiment is therefore the preferred embodiment of the invention since it avoids the risk that the tip is detached from the applicator element which could then hurt the user.
• the tip is heat-applied on the applicator element. This type of assembly is simpler than the previous one, well mastered.
• the tip is cold assembled on the applicator element, which makes it possible to work with various sizes of tip and applicator element.

Advantageously, the tip is made of elastomer.

BRIEF DESCRIPTION OF THE FIGURES

• la figure 1, une vue en coupe longitudinale d'un dispositif d'application et de conditionnement d'un produit cosmétique et/ou dermatologique selon un premier mode de réalisation de l'invention ;
• la figure 2, une vue en perspective de l'applicateur du dispositif de la figure 1 ;
• la figure 3, une vue en coupe de l'applicateur de la figure 2 ;
• la figure 4, une vue de côté schématique de l'embout de l'applicateur de la figure 2,
• la figure 5, une vue en coupe longitudinale de l'embout de la figure 4,
• la figure 6, une vue en coupe transversale de l'embout de la figure 4,
• la figure 7, une vue en perspective de l'embout de la figure 4,
• la figure 8, une vue en coupe longitudinale d'un dispositif d'application et de conditionnement d'un produit cosmétique et/ou dermatologique selon un deuxième mode de réalisation de l'invention ;
• la figure 9, une vue de côté de l'embout de l'applicateur du dispositif de la figure 8 ;
• la figure 10, une vue en perspective de l'embout de la figure 9;
• la figure 11, une vue en coupe transversale de l'embout de la figure 9
• la figure 12, une vue en coupe transversale d'un embout d'un dispositif selon un autre mode de réalisation de l'invention.

Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended figures, which illustrate:

• the figure 1 , a longitudinal sectional view of a device for applying and conditioning a cosmetic and / or dermatological product according to a first embodiment of the invention;
• the figure 2 , a perspective view of the applicator of the device of the figure 1 ;
• the figure 3 , a sectional view of the applicator of the figure 2 ;
• the figure 4 , a schematic side view of the tip of the applicator of the figure 2 ,
• the figure 5 , a longitudinal sectional view of the mouthpiece of the figure 4 ,
• the figure 6 , a cross-sectional view of the mouthpiece of the figure 4 ,
• the figure 7 , a perspective view of the mouthpiece of the figure 4 ,
• the figure 8 , a longitudinal sectional view of a device for applying and conditioning a cosmetic and / or dermatological product according to a second embodiment of the invention;
• the figure 9 , a side view of the tip of the applicator of the device of the figure 8 ;
• the figure 10 , a perspective view of the mouthpiece of the figure 9 ;
• the figure 11 , a cross-sectional view of the mouthpiece of the figure 9
• the figure 12 , a cross-sectional view of a tip of a device according to another embodiment of the invention.

For the sake of clarity, identical or similar elements are marked with identical reference signs throughout the figures.

DETAILED DESCRIPTION OF AN EMBODIMENT

The figure 1 represents a device for applying and conditioning a mascara according to one embodiment of the invention. This device comprises an applicator 1 and a container 2. The container 2 is provided with a wiper member 3. The container 2 is made of rigid plastic. The container 2 contains a mascara P in which a part of the applicator 1 is immersed when it is in the container 2. When the applicator 1 is in the container 2, the applicator 1 can be screwed on the container 2 .

The applicator 1 is represented more precisely on the figures 2 and 3 . It comprises a gripping member 4 at the end of which is a rod 5. The rod 5 is preferably made of polyoxymethylene, polypropylene or any other rigid material. When the device is in the closed position, the gripping member 4 comes into contact with the container 2 so that the device is sealed.

The rod 5 extends longitudinally along a reference axis X. The rod 5 is cylindrical of transverse dimension D1 which is equal here to the diameter of the cylinder formed by the rod 5. The rod 5 has a cross section complementary to that of the wiper member 3 so that, when the applicator is removed from the container, the rod slides against the inner walls of the wiper member, without the movement of the rod 5 being obstructed by the wiper member; wiper member 3.

At the end of the rod 5, there is an applicator element 6 which extends longitudinally along the axis X. This applicator element 6 has a proximal end 6a which is close to the rod 5 and a distal end 6b which is located 5. The applicator element 6 consists of a central metal core 7 which extends in the extension of the rod 5 along the X axis and which is surrounded by a brush 8 consisting of fur. The brush 8 is elastically deformable. The brush has a diameter D2 and extends parallel to the axis X over a length L2.

A tip 9 covers the distal portion 6b of the applicator element 6. More specifically, the tip 8 is overmolded on the distal end of the central core 7 of the longitudinal applicator element 6. This tip is formed of a single piece of TPE or thermoplastic elastomer.

The tip 9 consists of a core 10. This core 10 has a proximal portion 10a adjacent to the applicator element 6 and a distal portion 10b remote from the applicator element 6. The proximal portion 10a of the core forms a cylinder, while the distal portion 10b of the core forms a hemisphere. The entire core delimits laterally a first cylindrical envelope of diameter D3. The core 10 extends longitudinally over a length L3.

The tip 9 also has asperities 12 located on the surface of the core 10. These asperities 12 form pins 13 which protrude from the surface of the core 10 and are distributed on its surface. On the proximal portion 10a of the core, the pins are aligned parallel to the X axis, and on the distal portion 10b of the core 10, these pins 13 are distributed regularly so that their ends delimit a hemisphere. The pins, which are made of TPE as the rest of the tip have a shape of small cones of diameter at the base equal to 0.2 mm and a length substantially equal to 2 mm. These spikes are elastically deformable.

The tip 9 is made by injection in one piece and it is overmolded on the applicator element 6.

The asperities 12 delimit laterally a second cylindrical envelope 14 of transverse dimension D4. D4 is here the diameter of the cylinder 14.

The dimensions of the mascara applicator verify the following relationships: 0.4D1 <D3 <0.99D1 and 0.05L2 <L3 <0.5L2. In addition, D4 is greater than or equal to D1.

In the present case, D1 is equal to 4.3 cm, D2 to 4.5 cm, D3 to 4 cm and D4 to 4.5 cm. As for L2, it is equal to 19 cm, while L3 is equal to 10 cm. These dimensions are particularly advantageous and they constitute a preferred embodiment of the invention, independently of the materials chosen in this detailed embodiment.

These dimensions are chosen so that, when the applicator 1 is taken out of the container 2, the rod 5 of the applicator 1 slides easily in the wiper member 3. On the other hand, the brush 8 of the applicator 1 applicator element 6 can not leave the wiper member 3 without elastically deforming and, therefore, the brush 8 is wrung against the wiper member 3. Thus the excess mascara on the brush 8 is retained inside the container 2 by the wiper member 3, which prevents the brush 8 is overloaded with mascara and therefore avoids mascara packets on the eyelashes.

In addition, the core 10 is sufficiently narrow to pass through the wiper member without hindrance. Thus, the mascara on the surface of the core 10 is not removed during the passage of the core 10 by the wiper member 3. On the other hand, the pins 13 can not pass through the wiper member 3 without being deformed by the walls of the wiper member 3, which allows to remove the excess mascara on the pins 13. With this spin, the pins 13 which allow essentially to apply the mascara to the corner of the eyelashes and on the small eyelashes, have on their surface a thin layer of mascara only, which avoids the packets of mascara at the corner of the eyelashes.

In addition, the pins 13 have a length substantially equal to a quarter of the transverse dimension of the core 10, so that the tip 9 has a sufficiently deep surface between the pins 13 to load enough mascara to its surface, but without however present a too deep surface, which would lead to an overload of mascara on the tip 9 and mascara that would remain stuck at the base of the pins 13.

Moreover, the tip 9 has a length L3 substantially equal to half the length L2 of the applicator element 6. This ratio of the lengths, independently of the materials or geometries chosen in this embodiment, makes it possible to have sufficient laying surface on the surface of the applicator element 6 for makeup the longest eyelashes homogeneously, while having a nozzle 9 long enough to allow precision work with this tip.

The invention therefore allows a uniform application of mascara both on small eyelashes as on large, and without packets.

In the embodiment described above, the tip and the applicator element are elastically deformable, while the wiper member is dimensionally stable. However, it is also conceivable to produce a tip and an applicator element dimensionally stable, which pass through an elastically deformable wiper member, comprising rubber for example.

The wiper member may also give rise to variations: it may consist solely of a throat through which the applicator passes or it may be more complex to optimize the wringing of the applicator.

The Figures 8 to 11 represent another embodiment in which the tip 9 has a core 10 and pins 13. The core 10 has a cylindrical proximal end 10a and a hemispherical distal end 10b. The proximal end 10a of the core is covered with pins 13, while the distal end 10b is smooth, which avoids the risk of injury to the user with the distal end 10b. On the proximal end 10a, the pins 13 are distributed so that they form longitudinal lines 15 and 16. The proximal end 10a has six longitudinal lines 15 with pins having a length of 2 mm. Between two longitudinal lines 15 with pins of 2 mm are a longitudinal line 16 with pins having a length of 1 mm. This alternation of longer or shorter pimples makes it possible to space the eyelashes well.

The figure 12 represents a cross-sectional view of a tip 9 for a device according to another embodiment of the invention. This tip 9 has a core 10 covered by pins 13. These pins define a second asymmetric envelope 14 having at least one transverse dimension D4 greater than the transverse dimension D1 of the rod.

Naturally, the invention is not limited to the embodiments described above which are given for illustrative purposes only. In particular, it is conceivable to make a tip having another geometry. The core may for example have a hexagonal cross section. In this case, the core can also laterally delimit a first cylindrical envelope that passes through each of the edges of the hexagon.

It is also conceivable to give another shape to the asperities: they may for example form grooves on the surface of the core or they may form pins of cylindrical or rectangular section.

It is also possible to give another form to the applicator element without departing from the scope of the invention. For example, an applicator element in the form of a brush can be produced.

The materials may also give rise to various variants: thus the applicator element may be made entirely of elastomer, or it may also include metal. The tip may be made of NBR or crosslinked butyl nitrile or any other elastically deformable elastomer.

Claims (16)

Apparatus for applying and conditioning a cosmetic and / or dermatological product comprising: a container (2) containing the cosmetic and / or dermatological product (P), the container (2) comprising a wiper member (3); an applicator (1) comprising: - a rod (5), the rod (5) having a cross section complementary to that of the wiper member (3) so that the rod (5) slides through the wiper member (3) ), the rod (5) having a transverse dimension D1; an applicator element (6) axially extending the rod (5) and extending longitudinally along a length L2, the applicator element (6) comprising a proximal portion (6a) close to the rod (5) and a distal portion ( 6b) away from the rod (5), a tip (9) of plastic material covering the distal portion (6b) of the applicator element (6), the endpiece (9) comprising a core (10) covered by asperities (12), characterized in that the core (10) is geometrically contained within a first cylindrical shell (11) of diameter D3 and length L3 such that $$0.4\mathrm{D}1<\mathrm{D}3<0.99\mathrm{D}1;$$

$$0.05\mathrm{The}2<\mathrm{The}3<0.5\mathrm{The}2$$

and in that the asperities (12) delimit laterally a second envelope (14) having at least one transverse dimension D4 greater than or equal to the nominal transverse dimension D1 of the rod (5). Device according to the preceding claim, characterized in that the applicator element (6) consists of a longitudinal core (7) around which a brush (8) is wound. Device according to the preceding claim, characterized in that the brush (8) has a diameter D2 greater than the transverse dimension of the rod D1. Device according to any one of the preceding claims, characterized in that the rod (5) is cylindrical and in that the nominal transverse dimension D1 of the rod (5) is equal to the diameter of the rod (5). Device according to any one of the preceding claims, characterized in that the core (10) consists of a cylindrical proximal portion (10a) and a hemispherical distal portion (10b). Device according to any one of claims 1 to 4, characterized in that the core consists of a proximal portion (10a) of hexagonal cross-section and a hemispherical distal portion (10b). Device according to any one of claims 5 or 6, characterized in that only the proximal portion (10a) of the core is covered with asperities, the distal portion (10b) of the core being smooth. Device according to any one of the preceding claims, characterized in that the applicator element (6) consists of a metal core and a brush. Device according to any one of the preceding claims, characterized in that the tip (9) consists of a part formed by injection. Device according to any one of the preceding claims, characterized in that the asperities (12) of the tip (9) are constituted by pins (13) elastically deformable. Device according to the preceding claim, characterized in that the pins have different lengths Device according to any one of the preceding claims, characterized in that the tip (9) is overmolded on the applicator element (6). Device according to any one of claims 1 to 11, characterized in that the tip (9) is heat-applied on the applicator element (6). Device according to any one of claims 1 to 11, characterized in that the end piece (9) is assembled cold on the applicator element (6). Device according to any one of the preceding claims, characterized in that the tip (9) is made of elastomer. Device according to any one of the preceding claims, characterized in that the second envelope (14) is cylindrical.

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