EP3723543B1 - Dispensing assembly for cosmetic product, having a cartridge and a transmission element configured to be removably coupled - Google Patents

Description

Field of the invention

The invention relates to containers for cosmetic products. More specifically, the invention relates to cosmetic product dispensing assemblies that include a base and a tubular cartridge configured to be removably coupled together. The invention relates in particular to sets for dispensing lipstick.

Technological background of the invention

A cosmetic product dispensing assembly may comprise a base, a cartridge capable of being coupled to the base and other parts such as a cap complementary to the cartridge, the function of which is to prevent access to the cosmetic product. This is especially often the case with lipstick dispensing sets. The cartridge thus has the function of enclosing a stick of lipstick and of allowing access to it. To do this, the cartridge comprises a receptacle for the lipstick stick. The base has the function, inter alia, of allowing gripping of the lipstick dispensing assembly. When the assembly comprising the base and the cartridge is assembled, it thus forms a lipstick dispensing device.

The cartridge and the base are arranged one after the other along a longitudinal axis of the lipstick dispensing device. In addition, the cartridge and the base are coupled and can rotate, relative to each other, along an axis of rotation corresponding to the longitudinal axis of the lipstick dispensing device. Thus, by printing a rotation of the base relative to the cartridge, it is possible to move the receptacle of the lipstick stick along the longitudinal axis of the dispensing device.

Usually, the base and the cartridge are permanently mated. Thus, when the lipstick grape is consumed, it is necessary to purchase a new dispensing device.

To overcome the aforementioned drawback, dispensing devices have therefore been produced in which the base and the cartridge are removably coupled. Thus, when the lipstick stick is consumed, it is possible to separate the base and the cartridge and to renew only the cartridge, which is more ecological. In addition, a user can have only one base and several cartridges corresponding to lipstick sticks of different colors.

However, it is then necessary to provide a specific assembly line for dispensing devices whose base and cartridge are reversibly coupled and a specific assembly line for dispensing devices whose base and cartridge are permanently or non-removably coupled. This therefore has the disadvantage of complicating the manufacture of such devices.

The document US 2013/022384 A1 discloses a cosmetic product dispensing assembly comprising a cartridge removably attached to a receiving shell and a method of assembling said assembly.

Object of the invention

An object of the invention is to provide a cosmetic product dispensing assembly that is simpler to manufacture.

Brief description of the invention

To do this, provision is made according to the invention for a method of assembling a cosmetic product dispensing assembly, the dispensing assembly comprising a transmission element, a tubular cosmetic product cartridge and a receiving shell, the cartridge being configured to be removably coupled to the transmission element, and the receiving shell capable of receiving the transmission element, the method comprising at least the following steps: coupling the cartridge to the transmission element, the cartridge comprising an outer tube comprising at least one helical groove, a control sleeve comprising at least one longitudinal guide slot, a cosmetic product receptacle cooperating with the helical groove of the outer tube and the longitudinal guide slot of the control sleeve, and a bottom element integral in rotation with the control sleeve, and • arranging the transmission element coupled to the cartridge in the reception shell by a relative movement between the reception shell and the transmission element in a direction d snap-fastening, the snap-fastening direction being a direction of relative approach between the reception shell and the transmission element, the transmission element being configured to be received and held in a non-removable manner in the reception shell, the shell reception comprising a snap-fastening element on an internal face of the reception shell.

Thus, the receiving shell of the transmission element may have a standard dimension and be able to accommodate a transmission element configured to be coupled reversibly or definitively to an additional cartridge. Consequently, a series of housings for receiving the transmission element can be arranged on an assembly unit and a series of transmission elements configured to be coupled in a reversible or permanent manner can be deposited there. The transmission element and the receiving shell therefore form, when they are assembled, a complementary base of the cartridge, whether the cartridge is intended to be coupled in a removable or permanent manner to the base thus formed.

The standardization of the manufacture of the cosmetic product dispensing assembly is therefore increased. In addition, the function of the transmission element is to transmit a rotational movement, around a longitudinal axis of the cartridge, from the receiving shell to the bottom element and to the control sleeve, in order to allow has a user to move the cosmetic product receptacle along the longitudinal axis of the cartridge.

• l'élément d'encliquetage s'étend radialement depuis la face interne de la coque de réception ; l'élément d'encliquetage n'est pas visible de l'extérieur et la coque de réception peut présenter ainsi un aspect extérieur très valorisant ;
• l'élément d'encliquetage comprend une patte d'encliquetage ou une couronne d'encliquetage ; la coque de réception peut ainsi être formée d'un seul tenant, par exemple par injection ;
• l'élément d'encliquetage comprend une lèvre de section généralement triangulaire, la lèvre ayant une face supérieure inclinée de façon à former une rampe dans une direction d'encliquetage, une face interne de la lèvre étant perpendiculaire à la direction d'encliquetage ; ceci forme une solution robuste à l'arrachement ;
• un tel encliquetage entre la coque de réception et l'élément de transmission résiste avantageusement à une force de traction d'au moins 30 Newtons dans une direction opposée à la direction d'encliquetage ; une fois le clipsage initial réalisé, la rétention est suffisante pour tous les cas de figures des efforts de traction divers et variés qui peuvent être subis dans la vie du produit,
• l'élément de transmission comprend une portion présentant une forme cylindrique qui comporte une gorge apte à coopérer avec l'élément d'encliquetage ; on peut ainsi former l'élément de transmission par injection ;
• l'élément de transmission comprend un aimant permanent et l'élément de fond de la cartouche comprend un anneau en matériau ferromagnétique de manière à fournir une force de rétention magnétique entre la cartouche et l'élément de transmission lorsque la cartouche est accouplée sur l'élément de transmission ; l'effort de rétention magnétique est suffisamment élevé pour éviter un désaccouplement non souhaité de la cartouche mais il reste toutefois en deçà de la force de rétention procurée par l'encliquetage de l'élément de transmission à l'intérieur de la coque de protection ;
• le diamètre extérieur de l'élément de transmission est sensiblement identique au diamètre extérieur de l'organe d'accouplement de la douille de commande; on peut ainsi utiliser le même outillage pour fixer une cartouche classique de manière non amovible sur une base et aussi une cartouche du type susmentionné de manière amovible sur une base similaire.
• la douille de commande présente une première portion cylindrique et une seconde portion cylindrique disposée à la suite de la première portion cylindrique, la seconde portion cylindrique entourant l'élément de fond, présentant un diamètre supérieur à un diamètre de la première portion cylindrique et présentant une hauteur égale à une hauteur de l'élément de transmission ;
• le réceptacle de produit cosmétique comporte au moins un tenon de guidage qui passe au travers de la fente longitudinale de guidage de la douille de commande et qui est disposé dans la rainure hélicoïdale du tube extérieur ;
• le tenon de guidage est avantageusement un téton ;
• l'ensemble comprend un capuchon destiné à fermer la cartouche tubulaire ;
• le réceptacle de produit cosmétique comprend un raisin de rouge à lèvres;
• l'ensemble comprend un raisin de rouge à lèvres.

In addition, in preferred embodiments of the invention, one and/or the other of the following provisions may optionally be used:

• the snap-fastening element extends radially from the internal face of the receiving shell; the latching element is not visible from the outside and the receiving shell can thus have a very attractive external appearance;
• the latching element comprises a latching lug or a latching crown; the receiving shell can thus be formed in one piece, for example by injection;
• the latching element comprises a lip of generally triangular section, the lip having an upper face inclined so as to form a ramp in a latching direction, an internal face of the lip being perpendicular to the latching direction; this forms a robust solution to tearing;
• such a latching between the receiving shell and the transmission element advantageously resists a tensile force of at least 30 Newtons in a direction opposite to the latching direction; once the initial clipping has been carried out, the retention is sufficient for all scenarios of the various and varied tensile forces that may be suffered during the life of the product,
• the transmission element comprises a portion having a cylindrical shape which includes a groove capable of cooperating with the latching element; it is thus possible to form the transmission element by injection;
• the transmission element comprises a permanent magnet and the bottom element of the cartridge comprises a ring of ferromagnetic material so as to provide a magnetic retention force between the cartridge and the transmission element when the cartridge is mated to the transmission element; the magnetic retention force is high enough to avoid undesired uncoupling of the cartridge, but it nevertheless remains below the retention force provided by the latching of the transmission element inside the protective shell;
• the outer diameter of the transmission element is substantially identical to the outer diameter of the coupling member of the control sleeve; it is thus possible to use the same tooling to fix a conventional cartridge in a non-removable manner on a base and also a cartridge of the aforementioned type in a removable manner on a similar base.
• the control sleeve has a first cylindrical portion and a second cylindrical portion arranged after the first cylindrical portion, the second cylindrical portion surrounding the bottom element, having a diameter greater than a diameter of the first cylindrical portion and having a height equal to a height of the transmission element;
• the cosmetic product receptacle comprises at least one guide pin which passes through the longitudinal guide slot of the control sleeve and which is arranged in the helical groove of the outer tube;
• the guide stud is advantageously a stud;
• the assembly includes a cap intended to close the tubular cartridge;
• the cosmetic product receptacle includes a lipstick stick;
• the set includes a lipstick grape.

As an alternative to the solution of the snap-in element, according to another mode of

embodiment which does not form part of the invention as defined in the appended claims, provision is made for the transmission element to be configured to be press-fitted into the receiving shell.

Thus, as previously indicated, it is possible to manufacture on the same assembly line assemblies as defined above in which the cartridge and the transmission element can be coupled in a removable or non-removable manner.

An assembly comprising a cartridge and a transmission element as defined above is also provided according to the invention.

Finally, according to the invention, an assembly comprising a transmission element and a reception shell as described above is provided.

Brief description of the drawings

• la figure 1 illustre un ensemble de dispense, en coupe selon un plan comprenant un axe longitudinal, selon un mode de réalisation de l'invention, qui comprend une cartouche, un élément de transmission et une coque de réception de l'élément de transmission, et dans lequel l'élément de transmission n'est pas reçue dans la coque de réception et dans lequel la cartouche et l'élément de transmission sont accouplés,
• la figure 2 illustre, selon un même plan de coupe, cet ensemble dans lequel l'élément de transmission est reçu dans la coque de réception et dans lequel l'élément de transmission et la cartouche sont accouplés,
• la figure 3 représente, toujours selon le plan de coupe décrit ci-dessus, l'ensemble dans lequel l'élément de transmission est reçu dans la coque de réception et dans lequel l'élément de transmission et la cartouche sont désaccouplés,
• la figure 4 illustre l'élément de transmission, un élément de fond et une douille de commande de la cartouche accouplée à l'élément de transmission,
• la figure 5 représente en perspective, selon un autre mode de réalisation, la cartouche, dans laquelle on a ôté un tube extérieur, et l'élément de transmission accouplés,
• la figure 6 illustre en perspective une pièce d'habillage du tube extérieur de la cartouche,
• la figure 7 représente en coupe une pièce technique pour le tube extérieur,
• la figure 8 illustre en perspective la douille de commande pour la cartouche, et
• la figure 9 illustre en perspective un réceptacle de produit cosmétique, l'élément de fond et l'élément de transmission pour le dispositif de dispense.
• la figure 10 illustre plus particulièrement l'interface à rétention magnétique entre la base et la cartouche, selon une variante de mode de réalisation.

We will now describe, by way of non-limiting example, an embodiment of the dispensing assembly using the following figures:

• there figure 1 illustrates a dispensing assembly, in section along a plane comprising a longitudinal axis, according to an embodiment of the invention, which comprises a cartridge, a transmission element and a shell for receiving the transmission element, and in which the transmission element is not received in the reception shell and in which the cartridge and the transmission element are coupled,
• there picture 2 illustrates, according to the same sectional plane, this assembly in which the transmission element is received in the reception shell and in which the transmission element and the cartridge are coupled,
• there picture 3 represents, still according to the section plane described above, the assembly in which the transmission element is received in the reception shell and in which the transmission element and the cartridge are uncoupled,
• there figure 4 illustrates the transmission element, a bottom element and a cartridge control socket coupled to the transmission element,
• there figure 5 shows in perspective, according to another embodiment, the cartridge, in which an outer tube has been removed, and the coupled transmission element,
• there figure 6 illustrates in perspective a trim part of the outer tube of the cartridge,
• there figure 7 shows in section a technical part for the outer tube,
• there figure 8 illustrates in perspective the control sleeve for the cartridge, and
• there figure 9 illustrates in perspective a cosmetic product receptacle, the bottom element and the transmission element for the dispensing device.
• there figure 10 more particularly illustrates the magnetic retention interface between the base and the cartridge, according to an alternative embodiment.

Detailed description of an embodiment

For the sake of clarity, only the elements useful for understanding the embodiments described have been represented and will be detailed. It should be noted that, in the figures, the structural and/or functional elements common to the different embodiments have the same references. Thus, unless otherwise stated, such elements have identical structural, dimensional and material properties. Representation scales may vary from figure to figure.

We represented at figures 1 to 3 a dispensing set 10 of cosmetic product. The dispensing assembly 10, assembled, here forms a cosmetic product dispensing device 10. The cosmetic product dispensing device 10 comprises a cartridge 13, a transmission element 7 and a receiving shell 5 capable of receiving the transmission element 7. The dispensing device 10 optionally comprises a cap which closes access to the cartridge 13.

It will be noted that this defines the cosmetic product dispensing assembly which comprises the cartridge 13, the transmission element 7 and the receiving shell 5 of the transmission element 7 and in which these elements are not assembled.

The dispensing device 10 is a lipstick case. It thus contains a grape of PC lipstick. The PC lipstick stick is in the form of a solid or semi-solid material, in particular pasty, and is applied by rubbing on the lips of a user.

In addition, the dispensing device 10 has a generally cylindrical shape and has a longitudinal axis X. It extends between a first longitudinal end P and a second longitudinal end S. The second longitudinal end S of the dispensing device 10 is that which is furthest from the user's lips when applying the PC Raisin to their lips. In the remainder of the description, reference will also be made to first P and second S longitudinal ends, defined as above, when members of the dispensing device 10 will be described. In addition, we will use the adjectives “internal” and “ external” respectively with respect to the interior and exterior of the dispensing device 10. In addition, a median plane is defined as being a plane perpendicular to the longitudinal axis X.

The transmission element 7 has a generally cylindrical shape. It comprises a cylindrical main body 7A and an operating member 7B,6 resting on one face of the main body 7A and which is oriented towards the cartridge 13 when the transmission element 7 and the cartridge 13 are coupled in a removable manner. The operating member 7B has in fact the function of making it possible to removably couple the transmission element 7 to the cartridge 13 as will be described in detail below. The maneuvering member 7B also has the function of securing in rotation the transmission member 7 and the bottom element 4.

The operating member 7B defines a three-dimensional coded pattern which is presented here in the form of a key. It thus comprises a base 7C which extends in the median plane and which rests on the cylindrical wall 7A. The operating member 7B further comprises a coupling pin 7D which projects from the base 7C along the longitudinal axis X. The coupling pin 7D has a particular shape and contributes to giving the operating member 7B the key shape.

Coupling stud 7D bears the coded pattern defining a particular shape 67 of "A", illustrated in the figure 9 , when viewed longitudinally from above. Of course, according to variants, the particular shape 67 can have any type of shape and in particular a “C”, “S”, “Z” or even “X” shape.

It is advantageous for the coded pattern to define a particular shape easily identifiable by the user, for example a letter shape as indicated above. Thus, the user can easily spot that such transmission element 7 is adapted to be coupled to such cartridge 13.

In addition, it will be noted that the base 7C has a slightly larger diameter than the cylindrical wall 7A. In addition, the cylindrical wall 7A has at its first longitudinal end P a smaller diameter than a diameter D72 of the rest of the cylindrical wall 7A. Thus, the base 7C and the cylindrical wall 7A define a body of generally cylindrical shape which includes a groove 7E corresponding to the first longitudinal end P of the cylindrical wall 7A. The function of groove 7E will be described below.

The cylindrical wall 7A of the transmission element 7 also comprises, as illustrated schematically in the figures 1 to 3 and realistically on the figure 9 , a plurality of coupling grooves 72 regularly arranged on an outer radial face of the cylindrical wall 7A. The function of these mating grooves 72 will also be described below.

In addition, the operating member 7B comprises, circumferentially on a radial edge of the base 7C, a permanent magnet element which is here in the form of a magnet MB. The magnet MB has the general shape of a ring and extends circumferentially around the longitudinal axis X on the radial peripheral edge of the base 7C of the operating member 7B.

In this embodiment, the magnet MB essentially comprises iron, in particular in the form of ferrite, for example strontium ferrite or barium ferrite. According to variants, the magnet MB comprises an alloy of neodymium, iron and boron or an alloy of aluminium, nickel and cobalt or a polymer material which contains a powder comprising one of the materials or alloy described below. above.

The transmission element 7 can in particular be made of injected plastic. The cylindrical wall 7A and the maneuvering member 7B can be made in one piece or formed separately and assembled by gluing for example.

The receiving shell 5 of the transmission element 7 comprises a cylindrical wall 5A which extends along the longitudinal axis X. In addition, the receiving shell 5 comprises a flat wall 5B which extends in the plane median. The flat wall 5B forms a bottom of the receiving shell 5. The flat wall 5B thus forms a second longitudinal end S simultaneously of the receiving shell 5 and of the dispensing device 10 as illustrated in particular on the figure 2 .

In addition, the cylindrical wall 5A comprises, on an internal face 5D, a snap-fastening element 5C which extends radially towards the inside of the cylindrical wall 5A. This snap-fastening element 5C forms means for clipping the transmission element 7 into the receiving shell 5. In the example of the figures 1 to 3 , the snap-fastening element 5C is a snap ring. However, it could be that the snap-fastening element is not continuous on the internal face 5D of the cylindrical wall 5A. Thus, a plurality of snap-fastening elements could be arranged on the internal face 5D of the cylindrical wall 5A. They could be arranged in alignment along a circumference of the internal face 5D of the cylindrical wall 5A, or in a non-aligned manner.

According to one embodiment, the snap-fastening element 5C also has an adapted ramp shape giving the snap ring 5C a non-return function. Thus, according to one embodiment, the snap-fastening element 5C has the shape of a lip 9 of generally triangular section. An upper face 9A of the lip 9 is inclined so as to form a ramp in a latching direction D. The latching direction D is a direction of relative approach between the receiving shell 5 and the transmission element 7. The upper face 9A therefore allows the snap-fastening element 5C to slide against the transmission element 7 during their assembly in the snap-fastening direction D. lower face 9B of the lip 9 is perpendicular to the latching direction D. The lower face 9B therefore allows the latching element 5C to retain the transmission element 7 when the latter is assembled there, and this in resistance to relative movement of the receiving shell 5 and the transmission element 7 in a direction opposite to the latching direction D. It could be that the lower face 9B of the latching element 5C is at an angle not perpendicular with respect to the latching direction D. The lower face 9B of the latching element 5C could for example be inclined in the same direction as the upper face 9A and thus provide resistance against a movement of the element transmission 7 relative to the receiving shell 5 in the direction opposite to the latching direction D.

It will be noted that according to variants of this embodiment, the cylindrical wall 5A comprises on the internal face 5D any type of clipping means. These means may in particular comprise a latching element which may for example be a latching lug extending radially from the internal face 5D of the cylindrical wall 5A.

In addition, the cylindrical wall 5A also comprises on the inner face 5D, according to one embodiment, a plurality of coupling ribs (not shown) whose shape is complementary to that of the coupling grooves 72 of the element of transmission 7.

In addition, receiving shell 5 may have an outer section of circular, square or even hexagonal shape.

According to the invention, the transmission element 7 is configured to be received and held in the reception shell 5 permanently or non-removably.

To do this, as illustrated in particular in the figure 2 , the groove 7E is configured to cooperate with the snap ring 5C. More precisely, the groove 7E comprises a shoulder 79 on which the lower face 9B of the lip 9 rests.

In addition, the coupling grooves 72 are configured to cooperate with the coupling ribs of the cylindrical wall 5A of the receiving shell 5. It will be noted that the cooperation between the coupling grooves 72 and the coupling ribs have also has the function of securing in rotation around the longitudinal axis X the receiving shell 5 and the transmission element 7.

Moreover, independently of the shape of the snap-fastening element 5C chosen, its resistance against a movement of the transmission element 7 in the direction opposite to the snap-fastening direction D is preferably chosen to be greater than a force d coupling of the magnet MB with a magnet MC of the bottom element 4. According to one embodiment, the latching between the receiving shell 5 and the transmission element 7 resists a pulling force of at least minus 30 Newtons in a direction opposite to the click-in direction D.

According to a variant of this embodiment, the transmission element 7 is configured to be press-fitted into the receiving shell 5. To do this, the diameter D72 of the cylindrical wall 7A of the transmission element 7 is greater of a few millimeters to an internal diameter of the cylindrical wall 5A of the receiving shell 5.

Thus, when the receiving shell 5 receives and non-removably holds the transmission element 7, the receiving shell 5 and the transmission element 7 form a base 8 for the cartridge 13.

Furthermore, the cartridge 13 comprises an outer tube 1, a control sleeve 2, a receptacle 3 of the lipstick stick PC and a bottom element 4.

The outer tube 1, also illustrated in figures 6 and 7 , has the function of forming an outer cylindrical wall for the cartridge 13. The outer tube 1 has a generally cylindrical shape with an axis X. It comprises a first longitudinal end P intended to allow access to the lipstick stick PC and a second opposite longitudinal end S. The first longitudinal end P of the outer tube 1 also forms a first longitudinal end P for the cartridge 13. In addition, the outer tube 1 extends substantially over the entire height of the cartridge 13. It thus forms a protective sheath for the cartridge 13.

As shown in figures 6 and 7 , the outer tube 1 comprises a covering part 11 which surrounds a technical part 12. The covering part 11 gives the outer tube 1 adequate structural reinforcement. The technical part 12 comprises, on an internal cylindrical face, two helical grooves 12A which extend along the longitudinal axis X of the cartridge 13. These two helical grooves 12A are arranged facing each other. They are thus diametrically opposed.

In addition, the outer tube 1 has a first cylindrical portion 1A and a second cylindrical portion 1B arranged after the first cylindrical portion 1A. The first cylindrical portion 1A is closer to the first longitudinal end P of the cartridge 13 with respect to the second cylindrical portion 1B. The second cylindrical portion 1B has a diameter greater than a diameter of the first cylindrical portion 1A, for example 17 mm and 16 mm respectively for the outside diameters.

Thus, the cartridge 13 also has a first cylindrical portion and a second cylindrical portion arranged after the first cylindrical portion. The second cylindrical portion has a diameter greater than a diameter of the first cylindrical portion and surrounds the bottom element 4 as illustrated in the figures 1 to 3 .

Similarly, the trim piece 11 has a first cylindrical portion 11A and a second cylindrical portion 11B arranged after the first cylindrical portion 11A. The first cylindrical portion 11A is closer to the first longitudinal end P of the outer tube 1 with respect to the second cylindrical portion 11B. The second cylindrical portion 11B has a diameter greater than a diameter of the first cylindrical portion 11A. Note that the lower edge 11C of the outer tube forms integral radial protection for the bottom element (skirt function). In other words, the lower border 11C descends to the bottom and forms the overall dimension in the length of the cartridge. Concerning the assembly, the technical part 12 is inserted into the trim part 11 from below, until it comes into abutment against the internal shoulder (cf. Fig. 6 ).

The covering part 11 and the technical part 12 can be formed from metal or injected plastic. They can be fixed to each other by gluing. The covering part 11 and the technical part 12 can also be made in one piece.

In addition, the outer tube 1 comprises, at its first longitudinal end P, a circumferential coupling edge 1C, the function of which will be described later.

The control sleeve 2 also has a generally cylindrical shape. It is arranged against the internal cylindrical walls of the outer tube 1. As illustrated in figure 8 , the control sleeve 2 comprises a main body 2A of generally regular cylindrical shape. On this main body 2A, the control sleeve 2 has two longitudinal guide slots 2B through and diametrically opposed. Each longitudinal guide slot 2B extends parallel to the longitudinal axis X. At its first P and second S longitudinal ends, each longitudinal guide slot 2B extends, over a small distance relative to its longitudinal dimension, perpendicular to the axis (X), so as to define two limit positions 2C, 2D for the receptacle 3 as will be described later. The 2C end-of-travel position is relatively closer to the first longitudinal end P of the cartridge 13 than the 2D end-of-travel position.

In addition, on the radial periphery of its first longitudinal end P, the main body 2A comprises a flange 2E. The function of collar 2E will be described later.

In addition, disposed after the main body 2A, the control sleeve 2 comprises a coupling member 22 forming a second longitudinal end S of the control sleeve 2.

It will be noted that the coupling member 22 can make it possible to couple the control sleeve 2 to a base for a dispensing device in which the base and the cartridge are coupled in a non-removable manner. To do this, the coupling member 22 comprises a cylindrical wall having a plurality of coupling grooves 23.

In addition, the coupling member 22 comprises, on a wall facing the base when the base and the cartridge are coupled, an orifice 24 due to the fact that the control sleeve 2 is preferably formed by injection of a plastic material.

The outer tube 1 and in particular the second cylindrical portion 11B of the covering part 11 surrounds this coupling member 22. Thus, advantageously, the dispensing device 10 can be implemented with a control sleeve 2 also adapted for a dispensing device 10 in which the base and the cartridge are non-removably coupled. In addition, the coupling member also has the function of coupling the control sleeve 2 to the bottom element 4.

The receptacle 3 for the lipstick stick PC is here in the form of a receiving cup. In addition, it comprises a main body 3A of regular cylindrical general shape, that is to say of constant diameter along the longitudinal axis X. As illustrated in the figure 10 , the receptacle 3 comprises, on an outer face of the main body 3A, two guide pins 36 which are diametrically opposed and which extend radially outwards from the receptacle 3. The function of the two guide pins 36 will be described later. . The receptacle 3 also preferably comprises injected plastic.

The bottom element 4 extends mainly in the median plane. It comprises an additional maneuvering member 4A. The complementary operating member 4A comprises a complementary coded pattern here having the shape of a lock.

The complementary maneuvering member 4A comprises a first flat circumferential portion 4B which forms a longitudinal stop for the maneuvering member 7B as will be described in more detail below. The first planar portion 4B extends in the median plane.

The complementary maneuvering member 4A comprises a second planar portion 4C which extends at a distance from the planar portion 4B. The second flat portion 4C also extends in the median plane. The second planar portion 4C is closer to the first longitudinal end P of the cartridge 13 than the first planar portion 4B. In addition, the first flat portion 4B is farther from the longitudinal axis X than the second flat portion 4C which crosses this longitudinal axis X.

The second flat portion 4C bears the complementary coded pattern which has a particular shape 47 and contributes to giving the complementary operating member the shape of a lock. The particular shape 47 represents an "A", as illustrated in the figure 9 , when viewed longitudinally from above. Of course, according to variants, the particular shape 47 can have any type of shape and in particular a “C”, “S”, “Z” or even “X” shape.

Furthermore, as illustrated in the figures 1 to 4 , the bottom element 4 has a solid shape and thus closes access to the interior of the cartridge 13 via the second longitudinal end S of the cartridge 13.

In addition, the first flat portion 4B and the second flat portion 4C are shaped to sandwich a portion of the coupling member 22 of the control sleeve 2.

According to the embodiments shown, the first coupling means to the base 8 comprise a radial peripheral rim 4M of the bottom element 4.

In the examples illustrated in figures 8 to 10 , the radial peripheral rim 4M forms a magnetic coupling means and is for this purpose loaded with ferrites, that is to say more generally a ferromagnetic material capable of being magnetized in an induced manner under the effect of a magnetic field incident.

More precisely, the ferromagnetic material is a material having a passive magnetic property, that is to say a material which does not induce a permanent magnetic field under normal conditions but which is attracted by a magnet.

For example, particles of such a ferromagnetic material can be inserted during molding into the substrate plastic material to be molded.

For example, substrate plastic material to be molded is a thermoplastic material, such as polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC) or any other polymer suitable for molding and/or injection. The passive magnetic particles can be, for example, iron particles, ferrite particles or passivated ferric oxide particles.

According to an alternative solution illustrated in figures 1 to 3 , the first planar portion 4B comprises a permanent magnet element which is here in the form of a magnet MC. The magnet MC has the general shape of a ring and extends circumferentially around the longitudinal axis X on one face of the first planar portion 4B facing the base 7C of the transmission element 7, when the transmission element 7 and cartridge 13 are coupled as will be described later. In this embodiment, the magnet MC essentially comprises iron, in particular in the form of ferrite, for example strontium ferrite or barium ferrite. According to variants, the magnet MC comprises an alloy of neodymium, iron and boron or an alloy of aluminium, nickel and cobalt or a polymer material which contains a powder comprising one of the materials or alloy described below. above. According to variants, the magnet MC can be a piece of ferromagnetic material which reacts by magnetization to an incident magnetic field.

The magnet or the ring of ferromagnetic material MC is arranged on one face of the bottom element 4 opposite the flat wall 5B of the base 8 when the base 8 and the cartridge 13 are coupled.

At this point, the air gap in the coupled position will be less than 0.5 mm and preferably less than 0.2 mm. Knowing that the force of attraction between two elements under the action of a magnetic field decreases with the cube of the air gap distance, we will seek to obtain a space as small as possible and in practice we will have sought the ring NC ferromagnetic material directly in contact with the magnet 96, as shown in phantom lines at figure 10 .

In addition, the outer tube 1 surrounds radially and extends longitudinally over an entire height of the bottom element 4. In this case, the second cylindrical portion of the cartridge 13 includes the bottom element 4. In addition, a radial edge of the bottom element 4 is in direct contact with a radially inner face of the outer tube 1. Thus, as can be seen in particular on the figures 1 to 3 , the bottom element 4 forms, with the outer tube 1, the second longitudinal end S of the cartridge 13.

It will be noted that according to an advantageous variant, the bottom element 4 is arranged at a distance and set back from the second longitudinal end S of the cartridge 13. The bottom element 4 is thus arranged between and at a distance from the first P and second S longitudinal ends of the outer tube 1. This prevents manipulation of the bottom element 4 when the cartridge 13 is not coupled to the transmission element 7.

As indicated previously, the transmission element 7 and the cartridge 13 are effectively configured to be removably coupled.

To do this, as illustrated in the figures 1 to 3 , the magnet MB of the transmission element 7 and the magnet MC of the base element 4 are arranged facing each other when the transmission element 7 and the cartridge 13 are coupled in such a way removable. In addition, their facing faces have opposite polarities. Thus, they cooperate and generate a removable coupling force of the transmission element 7 and the cartridge 13.

In addition, the operating member 7B in the form of a key is capable of being engaged in the complementary operating member 4A in the form of a lock of the bottom element 4. This engagement also contributes to securing it in rotation around the longitudinal axis X the transmission element 7 and the bottom element 4.

Thus, the cartridge 13 is also removably coupled, via the transmission element 7, to the receiving shell 5. In addition, the receiving shell 5 and the cartridge are thus secured in rotation around the longitudinal axis X.

We will now describe an operation of the dispensing device 10, in particular for accessing the lipstick stick PC. Thus, the mobilities of the members of the cartridge 13 with respect to each other will in particular be described below.

The collar 2E of the control sleeve 2 has the function of cooperating with the circumferential coupling edge 1C of the outer tube 1 as illustrated in the figures 1 to 3 in particular to block in translation along the longitudinal axis X the control sleeve 2 with respect to the outer tube 1. In addition, the control sleeve 2 is rotatable around the longitudinal axis X with respect to the outer tube 1.

The bottom element 4 is fixed in rotation around the longitudinal axis X with respect to the control sleeve 2. This connection is in particular due to the cooperation between the coupling member 22 of the control sleeve 2 and the first 4B and second 4C flat portions of the bottom element 4. Thus, when the transmission element 7 and the cartridge 13 are coupled in a removable manner, the transmission element 7 and the control sleeve 2 are integral in rotation around the longitudinal axis X.

In addition, the receptacle 3 cooperates with the helical groove 12A of the outer tube 1 and the longitudinal guide slot 2B of the control sleeve 2. To do this, each of the two guide tenons 36 of the receptacle 3 cooperates with one of the two slots longitudinal guide 2B of the control sleeve 2 and passes through said slot. Thus, the receptacle 3 is movable in longitudinal translation, relative to the control sleeve 2, between the two end-of-travel positions 2C and 2D for the guide pin 36. In addition, each guide pin 36 cooperates with the one of the two helical grooves 12A of the outer tube 1 being disposed in said groove. Thus, the receptacle 3 is mobile in rotation around the axis X and in longitudinal translation relative to the outer tube 1.

Thus, when the control sleeve 2 begins to rotate relative to the outer tube 1 relative to the longitudinal axis X, each guide pin 36 of the receptacle 3 moves along a helical groove 12A and a longitudinal groove 2B. Thus, the receptacle 3 enters into rotation around the longitudinal axis X and in longitudinal translation relative to the outer tube 1.

Thus, when the user wishes to move the receptacle 3 longitudinally relative to the outer tube 1, for example to cause the lipstick PC to emerge beyond the first longitudinal end P of the outer tube 1, it blocks in longitudinal translation and in rotation around the longitudinal axis X the outer tube 1. Then, it imparts to the receiving shell 5 a rotational movement around the longitudinal axis X with respect to the outer tube 1. The transmission member 7 transmits this rotational movement to the bottom element 4. Thus, the bottom element 4 and the control sleeve 2 begin to rotate around the longitudinal axis X with respect to the outer tube 1. Each guide pin 36 of the receptacle 3 will then move along a helical groove 12A and a longitudinal guide slot 2B. The receptacle 3 thus moves longitudinally along the cartridge 13. It can therefore be seen that a relative rotation of the receiving shell 5 with respect to the cartridge 13 causes a movement of the receptacle 3 of lipstick sticks PC with respect to the outer tube 1 along the longitudinal axis X of the cartridge 13.

Moreover, as illustrated in the figure 4 , the coupling member 22 of the control sleeve 2 advantageously has a height H22 substantially equal to a height H72 of the cylindrical wall 7A of the transmission element 7. In addition, the coupling member 22 has a diameter D22 which is substantially equal to the diameter D72 of the cylindrical wall 7A. In addition, the outer tube 1 preferably has a diameter substantially equal to a diameter of the base 7C of the transmission element 7.

A method of manufacturing the dispensing device 10 will now be described.

The receiving shell 5, the transmission element 7 and the cartridge 13 are formed separately.

The receiving shell 5 and the transmission element 7 are preferably formed by injection molding a plastic material. To form the cartridge 13, the outer tube 1, the control sleeve 2, the receptacle 3 and the bottom element 4 are formed separately, for example by injection. Then, these members are assembled to form the cartridge 13.

Then,

the cartridge 13 is removably coupled to the transmission element 7.

Then, the transmission element 7, coupled to the cartridge 13, is placed in the reception shell 5 so that the transmission element 7 is received and held permanently, or non-removably, in the reception shell 5.

Of course, many variants may be added to the invention without departing from the scope thereof.

The transmission element 7 may in particular comprise means of direct coupling to the control sleeve 2.

The bottom element 4 may also include at least one slot so that the bottom element 4 does not close access to the interior of the cartridge 13 via the second longitudinal end S.

On the figure 10 , the magnet MB is an annular magnet marked 96 held by clipping two plastic parts 6.7. According to a typical example, the external diameter D92 of the ring magnet 96 is 16 mm. According to a typical example, the inside diameter D91 of the ring magnet 96 is 12 mm. The thickness of the ring magnet 96 is between 1 mm and 2 mm.

According to a variant third embodiment, with particular reference to the figure 10 , the magnetic and mechanical interface between the base and the cartridge is represented in more detail on the one hand in an uncoupled configuration (solid lines) and on the other hand in a coupled configuration (dotted lines). The coupling element 6 is associated with a transmission element 7 for fixing a permanent magnet 96 by clipping . The transmission element 7 comprises an annular groove 70 open upwards, and provided to receive clipping lugs projection of the coupling element 6 downwards. The transmission element 7 can be glued or fixed in the protective shell 5. The outer rim 78 of the base element comprises grooves 72 engaged in the protective shell 5 to obtain a connection at least in rotation.

The clipping lugs 60 comprise a bead 63 and an annular groove 64. The bead 63 is received in a complementary annular groove 73 of the transmission element 7. The annular groove 64 receives a complementary bead 74 of the transmission element 7 This forms a strong and durable clip.

Advantageously, a reliable and durable assembly is thus formed, without the use of glue.

In addition, an upper annular border 62 is provided which forms a shoulder to hold the magnet 96 in position against the outer rim 78 of the transmission element 7. The upper annular border 62 can be continuous or discontinuous along the circumferential direction. .

The external diameter D72 of the base element is preferably included in a range of values [15mm - 17mm]. Note that the diameter D72 is preferably advantageously identical to the diameter D22 of the coupling member of the control sleeve, which makes it possible to optimize the assembly means.

The internal diameter D70 of the base element is preferably included in a range of values [8mm-12mm].

If we consider the gap denoted e which separates the upper surface 9B of the permanent magnet and the lower surface of the ferrite ring 4B of the bottom element, in the coupled configuration, this is preferably less than 0.5 mm, or even close to zero.

On the example of the figure 10 , the drive in rotation of the bottom element 4 by the coupling element 6 is obtained the complementarity, total or partial, of the three-dimensional coded patterns coupled together.

The base 8 and the cap 15 ( Picture 10 in phantom) together form a case intended for the enhancement of the device for dispensing cosmetic products. The base and the cap can in particular comprise a decoration of high aesthetic rendering or even a decoration of luxury personalization.

Claims (11)

1. Method for assembling a dispensing assembly (10) of cosmetic product (PC), the dispensing assembly (10) comprising a transmission element (7), a tubular cartridge (13) of cosmetic product (PC) and a receiving shell (5), the cartridge being configured to be removably coupled to the transmission element (7), and the receiving shell (5) capable of receiving the transmission element (7), the method comprising at least the following steps:

   • coupling the cartridge to the transmission element, the cartridge comprising an outer tube (1) comprising at least one helical groove (12A), a control sleeve (2) comprising at least one longitudinal guide slot (2B), a receptacle (3) for cosmetic product (PC) cooperating with the helical groove (12A) of the outer tube (1) and the longitudinal guide slot (2B) of the control sleeve (2), and a bottom element (4) integral in rotation with the control sleeve (2), and

   • arrange the transmission element coupled to the cartridge in the reception shell by a relative movement between the reception shell and the transmission element in a snap-in direction (D), the snap-in direction being a direction of relative closeness between the reception shell and the transmission element, the transmission element (7) being configured to be received and maintained in a non-removable manner in the reception shell (5), the reception shell (5) comprising a snap-in element (5C) on an inner face (5D) of the receiving shell (5).
2. Method according to claim 1, wherein the snap-in element (5C) extends radially from the inner face of the receiving shell.
3. Method according to one of claims 1 to 2, wherein the snap-in element comprises one or more snap-in tab(s) or a snap-in ring.
4. Method according to one of claims 1 to 3, wherein the snap-in element comprises a lip (9) of generally triangular cross-section, the lip having an inclined upper face (9A) so as to form a ramp in a snap-in direction (D), a lower face (9B) of the lip being perpendicular to the snap-in direction.
5. Method according to one of claims 1 to 4, wherein a snap-fit between the receiving shell (5) and the transmission element (7) resists a tensile force of at least 30 Newtons in a direction opposite to the snap-in direction (D).
6. Method according to one of claims 3 to 4, wherein the transmission element (7) comprises a portion having a cylindrical shape which comprises a groove (7E) capable of engaging with the snap-in element.
7. Method according to one of claims 1 to 6, wherein a permanent magnet (96, MB) is provided on the transmission element (7) and the bottom element (4) of the cartridge comprises a ring of ferromagnetic material (4M) so as to provide a retention force between the cartridge and the transmission element (7) when the cartridge is coupled to the transmission element (7).
8. Method according to one of claims 1 to 7, wherein the outside diameter (D72) of the transmission element (7) is substantially identical to the outside diameter (D22) of the coupling member (22) of the control sleeve (2).
9. Method according to one of claims 1 to 8, wherein the receptacle (3) for cosmetic product comprises a stick of lipstick.
10. Method according to one of claims 1 to 9, wherein the receiving shell (5) and the transmission element (7) are formed by injection of a plastic material.
11. Method according to one of claims 1 to 10, wherein the cartridge is removably coupled to the transmission element, and then the transmission element is arranged in the receiving shell so that the transmission is received and held permanently, or not removable, in the receiving shell.

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