EP3958710A1

EP3958710A1 - Applicator for applying a cosmetic product, in particular mascara, associated applicator assembly and method for manufacturing such an applicator

Info

Publication number: EP3958710A1
Application number: EP20757357.7A
Authority: EP
Inventors: Yann Crapet; Sophie ARGIOLAS
Original assignee: Albea Services SAS
Current assignee: Albea Services SAS
Priority date: 2019-09-27
Filing date: 2020-08-20
Publication date: 2022-03-02
Also published as: WO2021058211A1; FR3101232B1; FR3101232A1; US20220232949A1

Abstract

The invention relates to an applicator (1) for applying a cosmetic product, comprising: - a core (2) extending along a longitudinal extension direction (X), known as the main direction, the core (2) comprising a plurality of protuberances (9.1) protruding from the core (2) and at least one cavity (5), - at least one movable part (7) that comprises a plurality of protuberances (9.2) protruding from the at least one movable part (7) and is contained in the at least one cavity (5), the at least one movable part (7) being able to move with respect to the core (2).

Description

DESCRIPTION

TITLE: Applicator for cosmetic product, in particular mascara, associated applicator assembly and method of manufacturing such an applicator

Technical field of the invention

The invention relates to an applicator for a cosmetic product, in particular mascara, and an associated applicator assembly. The invention further relates to a process for the manufacture of such an applicator.

Technical background

Mascara applicators can be obtained from fibrous elements held between the longitudinal parts of a twisted metal pin; they are then commonly called "twisted brushes". The ends of the fibrous elements usually form envelopes in a direction of longitudinal extension of the brush. The twisted brushes have, by their mode of manufacture, a cylindrical envelope which offers few possibilities in terms of makeup effects. Numerous solutions have already been proposed for imparting various shapes to twisted brushes.

Mascara applicators can also be obtained by injection molding of plastic material, they are then commonly called “plastic brushes”. Thus the plastic brushes can have original shapes in order to offer particular makeup effects.

However, there is still a need to improve mascara applicators, in particular to obtain applicators ensuring a sufficient load of cosmetic product and good restitution of the latter, while retaining flexibility in the application of the cosmetic product. Summary of the invention

The invention relates to an applicator for a cosmetic product, comprising:

- a core extending along a direction of longitudinal extension, called the main direction, the core comprising a plurality of protrusions projecting from the core and at least one cavity,

- at least one movable part comprising a plurality of protuberances projecting from the at least one movable part, and included in the at least one cavity, the at least one movable part being able to move relative to the core.

By "included" is meant that the at least one moving part is at least partly inside the cavity. This does not exclude that at least a portion of the at least one moving part is located outside the cavity. In other words, the at least one movable part includes at least a portion inside the cavity and can include at least a portion outside the cavity.

The mobility of the moving part (s) in its (or their) core cavity makes it possible to have locally a variation in the density of protuberances, for example an increase in the density of protuberances. In fact, the mobility of the movable part carrying the protuberances causes these protuberances to come together with the adjacent protuberances of the core.

The bringing together of the protuberances allows better shearing of the eyelashes caught in the protuberances which are thus better wrapped in cosmetic product and better combed.

Furthermore, the mobility of the mobile part (s) allows better restitution of cosmetic product which could be stored on / in the core, inside the cavity for example. According to different embodiments, which can be taken together or separately: - the at least one moving part is able to move in translation with respect to at least the main direction,

- the at least one moving part is able to move in translation (slightly oblique) with respect to at least the main direction with a component along X and at least one other component along Y or Z,

- the at least one moving part is able to move in rotation with respect to at least the main direction,

- the at least one moving part is able to move in translation and in rotation with respect to at least the main direction,

- the moving part is able to move relative to said rotating core about an axis transverse to the main direction,

- the at least one moving part is free to pivot angularly in all directions,

- the at least one moving part is free to pivot angularly with a certain angular limit,

- the at least one moving part is included in the at least one cavity of the core so as to be able to adopt at least one position in which the at least one moving part is free from any contact with the core,

- the at least one moving part is free of any contact with an external surface of the core,

- the at least one moving part is free of any contact with an internal surface of the at least one cavity,

- the at least one cavity opens into said core,

- the at least one moving part passes through the core in a direction transverse to the main direction,

- the core includes at least one retaining means so as to hold the moving part inside the cavity,

- the at least one movable part comprises at least one retaining means so as to maintain the movable part inside the cavity, - the core comprises at least one stop means so as to limit the movement of the at least one movable part relative to the core,

- the at least one movable part comprises at least one stop means so as to limit the movement of the at least one movable part relative to the core,

- a first reservoir volume of cosmetic product is formed on the surface of the at least one movable part,

- the at least one cavity forms a reservoir capable of being loaded with cosmetic product,

- the core has at least two cavities,

- the applicator includes at least two moving parts,

- each of the at least two moving parts is respectively included in one of the at least two cavities,

- each of the at least two moving parts is able to move relative to the soul, one independently of the other.

- the at least two moving parts are all identical in shape,

- the at least two moving parts are of different shapes,

- the at least two moving parts are of identical size,

- the at least two moving parts are of different sizes,

- the at least one movable part comprises a central body housed in the cavity

- the at least one movable part comprises at least one extension extending from the central body so that a free end of the at least one extension exits the cavity,

- the at least one extension serves as a retaining means for the moving part,

- the at least one extension extends towards at least one end of the core,

- the central body is cylindrical,

- the protuberances projecting from the at least one movable part protrude from the extension, - the core has a thickness varying in at least one direction orthogonal to the main direction, over all or part of a distance separating the at least two cavities so as to form on the surface of the core a second product reservoir volume cosmetic,

- the core has a plurality of areas of prominence following one another axially along an axis (X) of the core,

- the at least one cavity is made in an area of prominence of the soul,

- the plurality of areas of prominence is alternating with areas of narrowing,

- the constriction zones serve as a means of retaining the moving part,

- at least one of the ends of the core further comprises a prominence zone devoid of cavity,

- each of the ends of the core also includes a prominence zone devoid of cavity,

- the areas of narrowing are devoid of cavities,

- the core consists of a succession of first sections corresponding to areas of prominence, alternating with second sections corresponding to areas of narrowing,

- all the first sections have identical dimensions,

- all the second sections have identical dimensions,

- the positions of the first and second reservoir volumes are alternated along the main direction,

- the cavities are aligned in the same direction,

- the cavities are identical,

- the cavities are offset

- the protrusions projecting from the core are arranged in the form of longitudinal rows substantially parallel to the main direction, - the protrusions projecting from the at least one extension are arranged in the form of longitudinal rows substantially parallel to the main direction,

- the protrusions projecting from the core are arranged in the form of transverse rows substantially orthogonal to the main direction,

- the protrusions projecting from the at least one extension are arranged in the form of transverse rows substantially orthogonal to the main direction,

- the protuberances have a free end forming an envelope of generally cylindrical shape,

- the soul is a monolithic piece,

- each of the at least one moving part is a monolithic part,

- the applicator is obtained without assembly,

- the applicator is obtained by additive manufacturing.

The invention also relates to an applicator assembly for a cosmetic product, comprising:

- a container comprising a body forming a reservoir intended to contain the cosmetic product, and

- an applicator of the cosmetic product as described above adapted to be attached to the container, so that the applicator is housed inside the reservoir.

Finally, the invention relates to a process for the manufacture of an applicator for a cosmetic product, in particular a mascara, as described above. The method comprises: a step of developing a digital model of the applicator;

- a stage of manufacturing the applicator using the digital model.

Brief description of the figures

Other characteristics and advantages of the invention will become apparent on reading the detailed description which follows. for the understanding of which reference is made to the accompanying drawings in which:

[Fig. 1] Figure 1 is a sectional view of an exemplary applicator assembly according to the invention;

[Fig. 2] Figure 2 is a perspective view of an applicator according to a first embodiment of the invention;

[Fig. 3] Figure 3 is a longitudinal sectional view of the applicator of Figure 2;

[Fig. 4] Figure 2 is a longitudinal sectional view of the applicator of Figure 2;

[Fig. 5] Figure 5 is a cross-sectional view of the applicator of Figure 2;

[Fig. 6] Figure 6 is a cross-sectional view of the applicator of Figure 2;

[Fig. 7] Figure 7 is a perspective view of the applicator of Figure 2 in which the core and moving parts are in a detached position;

[Fig. 8] Figure 8 is a perspective view of the applicator of Figure 2;

[Fig. 9] Figure 9 is a perspective view of the applicator of Figure 2;

[Fig. 10] Figure 10 is a first side view of the applicator of Figure 2;

[Fig. 1 1] Figure 11 is a side view in longitudinal section of the applicator of Figure 10;

[Fig. 12] Figure 12 is a second side view in longitudinal section of the applicator of Figure 2;

[Fig. 13] Figure 13 is a perspective view of a second embodiment of the movable part according to the invention;

[Fig. 14] Figure 14 is a perspective view of a third embodiment of the movable part according to the invention;

[Fig. 15] FIG. 15 is a partial sectional view of a second embodiment of an applicator according to the invention; Detailed description of the invention

As illustrated in FIG. 1, the invention relates to an applicator 1 for a cosmetic product, in particular for mascara, comprising a core 2 extending along a direction of longitudinal extension, called the main direction and marked X in FIG. 1. .

The core 2 preferably has a first end 2a, also called the proximal end, able to be fixed to an applicator rod 3 1 by a sleeve 4 extending the core 2, and a second free end 2b, also called the end distal, opposite the first end 2a along the main X direction.

According to the invention, the core comprises at least one cavity 5 and the applicator comprises at least one movable part 7 included in the at least one cavity 5, the at least one movable part 7 being able to move relative to the soul 2.

Advantageously, as we will see below, the at least one movable part 7 is able to move in translation and / or rotation by contribution to the core 2, in particular the at least one movable part 7 is free to move. pivot angularly with respect to the web 2 in all directions.

Advantageously, the core 2 can comprise at least two cavities 5 and the applicator can comprise at least two moving parts 7 included respectively in a cavity 5 of the core 2. In the case of a plurality of cavities 5 and of moving parts 7, each of the moving parts 7 is advantageously able to move relative to the core 2, one independently of the other. To guarantee this mobility while maintaining the movable part 7 inside its cavity 5, the movable part 7 and / or the core 2 advantageously comprise retaining means and / or stop means as will be described in more detail below. detail later. The applicator 1 further comprises a plurality of protuberances 9.1 which protrude from the core 2 and a plurality of protuberances 9.2 which protrude from the moving part or parts 7. Preferably, the protuberances 9.1, 9.2 are integrally formed with the core 2 and / or the moving part (s) 7. The protuberances 9.1, 9.2 are thus made in one piece with the core 2 and / or the moving part (s) 7. The sleeve 4 is devoid of any protrusions 9.1, 9.2.

The core 2 can be solid or hollow without departing from the scope of the invention.

Thus, the core 2 has a plurality of zones of prominence 13 and a plurality of zones of constriction 15 following one another axially along the main direction X. The zones of prominence 13 alternate with the zones of constriction 15.

In the embodiment of Figures 1 to 12, each of the ends 2a, 2b of the core 2 is in the form of a zone of prominence 13 surrounding three other central zones of prominence 13 and four central zones of constriction 15. Otherwise Said, the core 2 has a thickness varying in at least one direction orthogonal to the main direction, here over the entire distance separating two cavities 5.

The central areas of prominence 13 are each provided with a cavity 5. These are through cavities 5 oriented transversely with respect to the main axis of the core 2 along a Y axis.

It is also conceivable in other embodiments, not shown, that the cavity (s) 5 do (s) not pass through.

In the embodiment illustrated in Figures 1 to 12, the core has two first opposite sides 17 provided with cavities and two second opposite sides 19 provided with hollows 19a and bosses 19b. The cross section at the level of a zone of prominence 13 is composed of two opposed circular arcs which delimit a housing forming each of said cavities 5 as can be seen in FIG. 6. Each of the cavities 5 have an internal surface.

In this embodiment, the core 2 comprises three cavities 5 regularly distributed along the main axis of the core 2. The cavities 5 are identical and they are aligned and oriented in the same direction Y.

It may be conceivable in other embodiments not shown that the cavities 5 are of different sizes, of different shapes, oriented in different directions, and / or oriented in a non-uniform manner.

On the other hand, in the embodiment illustrated here, the areas of prominence 13 located at each of the ends 2a, 2b of the core 2, as well as the areas of constriction 15 are devoid of cavity 5.

In this embodiment, each of the three cavities 5 comprises a movable part 7 which passes through the core 2 in the Y direction transverse to the main direction X.

The moving parts 7 are identical and comprise a central body 21 housed in the cavity 5 and four extensions (two extensions 23.1, 23.2 transversely opposed and two extensions 23.3, 23.4 axially opposed).

The central body 21 is cylindrical with a circular cross section and extends in the main direction X.

Each of the extensions 23.1, 23.2, 23.3, 23.4 extends from the central body 21 so that a free end 25 comes out of the cavity 5 and extends in the direction of one of the ends 2a, 2b of the core 2.

Two transversely opposed extensions 23.1, 23.2 or 23.3, 23.4 form a hollow cone of revolution interrupted angularly by one of the areas of prominence forming the web 2 thus forming two side edges 27. The cone projects from the center of the side wall of the central cylindrical body 21 from its top. In other words, each of the extensions 23.1, 23.2, 23.3, 23.4 extends outwards by widening, that is to say by moving away from the central body 21 of the movable part 7, and narrows at the level of the central body 21. Thus, each extension 23.1, 23.2, 23.3, 23.4 has a cross section in the form of an arc of a circle, the radius of which increases towards the free end 25.

Each of the extensions 23.1, 23.2, 23.3, 23.4 serves as a retaining means for the moving part 7 inside its cavity 5. In fact, the extensions 23.1, 23.2, 23.3, 23.4 come into abutment with the narrowing zones 15 and / or the areas of prominence 13 of the core 2 thus preventing the exit of the movable part 7 from its cavity 5.

The expression “means for retaining the movable part 7 inside its cavity 5” is understood to mean an element making it possible to at least partially maintain the movable part 7 inside its cavity 5. This does not exclude that 'at least a portion of the movable part 7 is located outside the cavity 5.

The extensions 23.1, 23.2, 23.3, 23.4 taken in combination with the narrowing zones 15 of the core 2 allow the movable part 7 to be held inside its cavity 5.

In the remainder of the description, in particular for the description of the movements of the moving parts 7 relative to the core 2, an orthonormal reference "C, U, Z" is defined in a non-limiting manner. The X axis corresponds to the direction of longitudinal extension of the core 2, called the main direction, mentioned previously and marked X. The Z axis corresponds to an axis orthogonal to the X axis and passing through the tops of the bosses 19b of the core 2. The Y axis mentioned above corresponds to an axis orthogonal to the X and Z axes. In Figures 1 to 12, the Y axis corresponds to the transverse orientation of the cavity 5. Advantageously, each of the moving parts 7 is able to move in translation and / or in rotation with respect to the core 2, in particular one independently of the other.

These different movements will be detailed below for the embodiment illustrated in Figures 1 to 12.

Each of the moving parts 7 can move in translation along the X, Y and Z axes.

The translational movement along the X axis is limited by the central body 21 of the movable part 7 which abuts against an adjacent narrowing zone 15.

The translational movement along the Y axis is limited by the two lateral edges 27 of two axially opposed extensions 23.1, 23.3 or 23.2, 23.4 which come into abutment against one of the first sides 17 of the core 2 at the level of the zones of narrowing 15 adjacent.

The translational movement along the Z axis is limited by the central body 21 and / or a side edge 27 of the four extensions 23.1, 23.2, 23.3, 23.4 which abuts against the internal surface of the cavity 5 at the level of the adjacent constriction zones.

Each of the moving parts 7 can also move in rotation around the X, Y and Z axes. This rotational movement being limited by the structure of the moving part 7 and / or of the core 2, it can be seen as angular pivoting of the movable part 7 relative to the X, Y and Z axes. Each of the movable parts 7 is free to pivot angularly with a certain angular limit which will be described for the embodiment illustrated in Figures 1 to 12:

The angular pivoting around the X axis is limited by - the side edges 27 of two axially opposed extensions 23.1, 23.3 or 23.2, 23.4 which come into abutment with the web 2 at the level of the two adjacent narrowing zones 15, and the opposite side edges 27 of the two other axially opposed extensions 23.1, 23.3 or 23.2, 23.4 which come into abutment with the other side of the core 2 at the level of the two adjacent narrowing zones 15.

The angular pivoting around the X axis is between -45 ° and + 45 ° °, preferably between -15 ° and +15 °.

Angular pivoting around the Y axis is limited by:

- the side edges 27 of two transversely opposed extensions 23.1, 23.2 or 23.3, 23.4 which come into abutment with the core 2 at the same level of adjacent narrowing 15, and

- the side edges 27 of the two other extensions 23.1, 23.2 or

23.3, 23.4 transversely opposed which come into abutment with the web at the level of the other adjacent constriction zone 15. The angular pivoting around the Y axis is between -45 ° and 45 °, preferably between -15 ° and + 15 °.

Angular pivoting around the Z axis is limited by:

- the two side edges 27 of the same extension 23.1, 23.2,

23.3, 23.4 which come into abutment with the web 2 at the same level of the same adjacent narrowing zone 15, and

- the two side edges 27 of another extension 23.1, 23.2,

23.3, 23.4 axially and transversely opposite which abut with the web 2 at the level of another adjacent narrowing zone 15.

The angular pivoting around the Z axis is between -60 ° and + 60 °, preferably between -45 ° and + 45 °.

In the embodiment shown in Figures 1 to 12, each of the moving parts 7 is included in a cavity 5 of the core 2 so as to be able to adopt at least one position in which it is free from any contact with the core 2. .

By free of any contact is meant an absence of material bond between the core 2 and the moving part 7, which does not prevent friction between the core 2 and the moving part 7. In particular, here the moving parts 7 are free from any contact with an external surface of the core 2 but also with the internal surface of the cavity 5 in which each is included.

It is also conceivable in an embodiment not shown that each of the moving parts 7 is linked to the core 2 so that the mobility of the moving part 7 described above is maintained. For example, advantageously, each of the moving parts 7 comprises at least one means of connection to the core 20

It may be, for example, a tongue connecting the movable part 7 to the core 2, such as the outer surface of the core 2 or the inner surface of the cavity 5 in which it is included. The tongue must be sufficiently flexible and elastic to allow this mobility.

As illustrated in FIG. 13, the movable part 7 may be in the form of a cube having domed faces. The curvature of the faces allows the movable part 7 to be held in the cavity 5 of the core 2. In this embodiment, the protuberances 9.2 protrude from two opposite faces 29. For greater visibility, the protrusions 9.2 have not been shown.

The movable part 7 can also be, for example, a cylinder of circular cross section, the transverse wall 31 of which is convex as illustrated in FIG. 14. The convex shape of the transverse wall 31 makes it possible to have a central part of diameter less than that of the bases 33 which maintains the movable part 7 in its cavity 5. In this embodiment, the protuberances 9.2 protrude from the opposite bases 33. For greater visibility, the protrusions 9.2 have not been shown.

In other embodiments, such as that shown in FIG. 15, the applicator 1 can comprise several moving parts 7 which are different. In this embodiment, the applicator 1 comprises a movable part 7 in the form of a convex cube such as that described above and illustrated in FIG. 13 and a cylindrical movable part 7 such as that described above and illustrated in FIG. 14. For greater visibility, the protrusions 9.1, 9.2 have not been illustrated.

It is also conceivable that the moving parts 7 are of different sizes and / or oriented in different directions. The moving parts 7 can be evenly distributed along the main axis X, in particular with an identical distance between each of the moving parts 7 as illustrated in Figures 1 to 12.

In another embodiment not shown, the moving parts 7 can be distributed along the main axis X in a non-uniform manner. In other words, the distance between two moving parts 7 can be variable.

Advantageously, each of the cavities 5 forms a reservoir capable of being loaded with cosmetic product. The cosmetic product contained in the cavities 5 can be easily restored, in particular with the movement of the movable part 7 included therein.

Advantageously, the movable part 7 has a design making it possible to form on its surface a reservoir of cosmetic product, called the first reservoir volume V1. In the embodiment shown in Figures 1 to 12, the first reservoir volume V1 is located between the extensions 23.1, 23.2, 23.3, 23.4 of the moving part 7.

Advantageously, the formation of the constriction zones 15 at the level of the core 2, in other words the variation in thickness of the core 2 makes it possible to form on the surface of the latter a second reservoir volume V 2 of cosmetic product. .

In the embodiment shown in Figures 1 to 12, the positions of the first and second reservoir volumes V1, V 2 are alternated along the main direction X. This makes it possible to have homogeneity in the distribution of the cosmetic product along the main axis X. Advantageously, the protuberances 9.1, 9.2 protrude from the core 2 and / or movable elements in a direction substantially normal with respect to the main direction X, called the radial direction.

The expression “the protuberances 9.1, 9.2 protrude in a direction substantially normal with respect to the main direction X”, protrusions 9.1, 9.2 which protrude in a plane comprising the main direction X and a radial direction of the direction X. In other words, the protuberances 9.1, 9.2 may be inclined, in this plane, towards the proximal and / or distal end, this without departing from the scope of the invention. In other embodiments not shown, the protrusions 9.1, 9.2 may have an inclination. They can, for example, protrude by forming an angle with the main direction X other than 90 °. In other words, the protuberances 9.1, 9.2 can be inclined towards the second end 2b of the core 2 or inclined towards the first end 2a of the web 2. The protuberances 9.1, 9.2 can also have a different inclination with respect to each other. to the other.

The protuberances 9.1, 9.2 extend from one end 91 integral with the core 2 and / or the moving parts 7 towards a free end 92 in an elongation direction so as to define a height.

The term "height" of the protuberances 9.1, 9.2 is understood to mean the height measured between the radial periphery of the core 2 and / or of the movable part 7 and the free distal end 92 of the protuberance 9.1, 9.2. In other words, by “height” of the protuberances 9.1, 9.2 is meant their radial extension measured from the base of the protuberance 9.1, 9.2, in projection on a plane orthogonal to the main direction X.

In the embodiment shown in Figures 1 to 12, the protuberances 9.1, 9.2 have over most of the length of the applicator 1, a different height so as to that their free end forming an envelope E1 of generally cylindrical shape.

However, the so-called distal protuberances 9.1, 9.2, that is to say the protuberances 9.1, 9.2 which extend near the distal end 2b of the core 2 have different heights so as to form an envelope E2 bullet-shaped as shown in Figures 1 to 12.

The bullet-shaped envelope facilitates in particular the insertion of the applicator 1 through the neck of the container containing the cosmetic product and the application of the cosmetic product at the level of the inner corner of the eye.

It is also conceivable in an embodiment not shown that the heights are identical. In this case, the envelope formed by the free ends of the protuberances 9.1, 9.2 is similar in shape to the core 2, that is to say has hollows and bumps.

In the embodiment illustrated in Figures 1 to 12, the protrusions 9.1, 9.2 have a quadrilateral cross section of identical size and shape over their entire height.

It is also conceivable in an embodiment not shown that the protuberances 9.1, 9.2 have a cross section whose dimension is greater in the vicinity of the end 91 than in the vicinity of the free end 92 of the protrusion 9.1, 9.2. In other words, the cross section of the protuberance 9.1, 9.2 has a dimension which decreases from the end 91 towards the free end 92.

In the embodiment shown in Figures 1 to 12, the protrusions 9.1, 9.2 projecting from the moving parts 7 project from each of the extensions 23.1, 23.2, 23.3, 23.4.

The protuberances 9.1, 9.2 of the core 2 and of the extensions 23.1, 23.2, 23.3, 23.4 are arranged in the form of longitudinal rows substantially parallel to the main direction and in the form of transverse rows substantially orthogonal to the main direction.

It is also conceivable, in other embodiments not shown for the longitudinal rows to be inclined with respect to the main direction X, or for them to wind helically around the core or any other possible arrangement.

The helical winding can be such that the angular offset is between 2 and 10 °, preferably 5 °, so that when viewed from the distal end the protrusions appear to form a solid disc.

As other possible arrangements, the protuberances can for example be arranged so as to form a zigzag, or else an undulation, that is to say, be arranged on either side of the main axis X so as to form opposite ridges, or in other words so as to form alternately salient and re-entrant angles.

In other embodiments not shown, the protrusions projecting from the core 2 and from the moving part (s) can be arranged randomly without forming longitudinal rows.

In the embodiment shown in Figures 1 to 12, the longitudinal and transverse rows of protuberances 9.1, 9.2 comprise protuberances 9.1, 9.2 coming either from the web 2 only, or from the web 2 and extensions 23.1, 23.2, 23.3, 23.4.

During the application of the cosmetic product, the movement made by the user causes a translational and / or rotational movement of each of the moving parts 7.

These different movements lead to a modification of the distance between the protuberances 9.1, 9.2 of the core 2 and of the moving part 7. This modification of the distance causes shearing of the eyelashes caught between the protuberances 9.1, 9.2 and a increase in the density of protrusions 9.1, 9.2 making it possible to wrap the eyelashes with a maximum of cosmetic product and thus increase the volume effect. The eyelashes can also be stretched when they get stuck between two protuberances 9.1, 9.2 which promotes combing.

Furthermore, the movements of the moving parts 7 also cause the expulsion of the cosmetic product stored in the cavity 5 and / or in the first and second reservoir volumes V1, V 2, that is to say stored at the level of the moving parts. 7 and at the level of the constriction zones 15 of the core 2.

It should also be noted that the applicator 1 advantageously forms a brush.

The core 2 and each of the moving parts 7 are unique monolithic parts.

Advantageously, the core and each of the parts are obtained without assembly. In other words, the core and each of the parts are not obtained by assembly.

Advantageously, the applicator 1 is obtained without assembly. In other words, the applicator 1 is not obtained by assembly.

Assembly is understood here as putting together, bringing together at least two isolated elements, but does not exclude the possibility of several steps.

Preferably, the applicator 1 described above is obtained by an additive manufacturing process.

The term “additive manufacturing process” is understood to mean a manufacturing process by adding material, generally aided by computer. Such a manufacturing process is also called three-dimensional printing or even 3D printing.

Advantageously, the use of three-dimensional printing can make it possible to produce in a single step an applicator 1 comprising a core 2 having protuberances 9.1, 9.2 and at least one cavity 5 and at least one moving part 7 included in one of the cavities 5. Such an applicator

It could prove to be very complex or even impossible to obtain, especially in a single step, by a conventional injection molding process. It is thus possible to produce, directly and by a single manufacturing operation, the applicator 1. In addition, this technique makes it possible to dispense with the use of complex molds.

It can also be envisaged as an alternative embodiment that the three-dimensional printing is used to form the core 2 with the sleeve 4 and / or the rod 3.

Different additive manufacturing technologies known to those skilled in the art can be used. In particular, it can be:

- fused deposition modeling (FDM),

- selective laser melting (SLM for Selective Laser Melting),

- selective laser sintering (SLS for Selective Laser Sintering),

- electron beam melting (EBM for Electron Beam Melting in English), stereolithography or photopolymerization (SLA for Stereolithography Apparatus in English), or

- modeling of laminated objects (LOM for Laminated Object Manufacturing in English).

Preferably, these are sintering and / or stereolithography technologies.

The invention also relates to a method of manufacturing an applicator 1 as described above. The process includes:

- a stage of developing a digital model of the applicator

1;

- a manufacturing step of the applicator 1 by means of the digital model. The digital model is a computer file which corresponds to a virtual model of the applicator 1. To obtain it, the applicator 1 is first of all modeled so as to obtain a CAD model which is then converted into an appropriate format such as than a “.STL” file. The file is then used on an additive manufacturing machine. When it is read, the digital model is cut into a number of layers depending on the desired precision. Preferably, the layers correspond to a cross section of the applicator 1, that is to say a section of the applicator 1 taken in a plane perpendicular to the longitudinal main direction X.

Suitable materials for making the applicator 1 by three-dimensional printing are polyamides, photosensitive resins, polylactic acid (PLA), acrylonitrile butadiene styrene (ABS).

The invention also relates to an applicator assembly 35 for a cosmetic product, comprising the container 37 comprising a body 39 forming a reservoir intended to contain the cosmetic product (not shown), and an applicator 1, as described above, adapted to be attached to the cosmetic product. the container 37, so that the applicator 1 is housed inside the reservoir. The applicator 1 is fixed, for example, to a proximal end of the rod 3, itself fixed to a stopper 41 advantageously screwed to the container 37. Advantageously, the applicator assembly 35 can be obtained in whole or in part by three-dimensional printing.

Claims

1. Applicator (1) for cosmetic product, comprising:

- a core (2) extending along a direction of longitudinal extension (X), called the main direction, the core (2) comprising a plurality of protuberances (9.1) projecting from the core (2) and at least one cavity (5),

- at least one movable part (7) comprising a plurality of protuberances (9.2) projecting from the at least one movable part (7), and included in the at least one cavity (5), the at least one movable part (7) ) being able to move relative to the core (2).

2. Applicator (1) according to the preceding claim, wherein the at least one movable part (7) is able to move in translation and / or in rotation.

3. Applicator (1) according to any one of the preceding claims, wherein the at least one cavity (8) opens into said core (2), the at least one movable part (7) passing through the core (2). in a direction transverse to the main direction.

4. Applicator (1) according to any one of the preceding claims, wherein the core (2) and / or the at least one movable part (7) comprise at least one retaining means so as to hold the movable part ( 7) inside the cavity (5) and / or at least one stop means so as to limit a movement of the at least one movable part relative to the core.

5. Applicator (1) according to the preceding claim, wherein a first reservoir volume (V1) of cosmetic product is formed on the surface of the at least one movable part (7).

6. Applicator (1) according to any one of the preceding claims, wherein the core (2) comprises at least two cavities and the applicator comprises at least two moving parts. (7), each of the at least two moving parts (7) being respectively included in one of the at least two cavities (8), and able to move relative to the core (2), one independently of the other.

7. Applicator (1) according to the preceding claim, wherein the at least two moving parts (7) are all identical.

8. Applicator (1) according to any one of claims 6 or 7, wherein the core (2) has a thickness (e1, e2, e3) varying in at least one direction orthogonal to the main direction, over all or part of a distance separating the at least two cavities so as to form on the surface of the core (2) a second reservoir volume (V2) of cosmetic product.

9. Applicator (1) according to the preceding claim wherein the positions of the first (V1) and second reservoir volumes (V2) are alternated along the main direction.

10. Applicator (1) according to any one of the preceding claims, wherein the applicator (1) is obtained without assembly.

11. Applicator (1) according to any one of the preceding claims, wherein the applicator (1) is obtained by additive manufacturing.

12. Applicator assembly (35) for cosmetic product, comprising:

- a container (37) comprising a body (39) forming a reservoir intended to contain the cosmetic product, and

- an applicator (1) of the cosmetic product according to one of claims 1 to 7 adapted to be attached to the container (37), so that the applicator (1) is housed inside the reservoir.

13. A method of manufacturing an applicator (1) for a cosmetic product according to any one of claims 1 to 10, the method comprising: - a step of developing a digital model of the applicator

(1);

- a manufacturing step of the applicator (1) using the digital model.