Cosmetic product application device, cosmetic product packaging assembly, and method for assembling a cosmetic product application device

Abstract

Cosmetic product application device, cosmetic product packaging assembly, and method for assembling a cosmetic product application device. The invention relates to a cosmetic product application device (16) comprising: - a stem holder (52); and - a stem (50) defining a first end (51) and a second end (53) opposite the first end (51), the second end (53) of the stem (50) being intended to carry a cosmetic product applicator (54). The stem holder (52) comprises a closed portion (72) for securing the first end (51) of the stem (50) centered on a stem holder axis (B-B') and a sealing skirt (74) centered on the stem holder axis (B-B') and located axially away from the securing portion (72) and defining an insertion opening (90) for the first end (51) of the stem (50). Figure for the abbreviation: Figure 1

Description

Title of the invention: Cosmetic product application device, cosmetic product packaging assembly, and method for assembling a cosmetic product application device

[0001] The present invention relates to a cosmetic product application device comprising a stem holder and a stem defining a first end and a second end opposite to the first end, the second end of the stem being intended to carry a cosmetic product applicator.

[0002] A cosmetic product is, in particular, a product as defined in Regulation (EC) No 1223 / 2009 of the European Parliament and of the Council of 30 November 2009 on cosmetic products. For example, a cosmetic product is a coloring, makeup or skincare composition, such as lip gloss or mascara.

[0003] The cosmetic product is generally contained in a container or bottle equipped with a cosmetic product application device capable of extracting a quantity of cosmetic product and applying said quantity of product to a body surface, so as to obtain the desired effect.

[0004] The application member generally comprises a rod intended to carry an applicator intended to reach the bottom of the container and a rod holder intended to mount the rod onto the container.

[0005] Generally, the rod holder includes a sealing skirt intended to ensure a seal between the container and the rod holder.

[0006] It is known to manufacture such application organs in a single piece molded from a plastic material.

[0007] Furthermore, it is known to install a wringer at the neck of the container in which the opening is defined, particularly to clean the rod before application. The diameter of the wringer is therefore generally adapted to the diameter of the rod.

[0008] In the case of an applicator with a large radial dimension, for example greater than 4 mm, it is necessary to increase the diameter of the rod accordingly, in particular so that the wringer is able to clean the rod satisfactorily without wringing the applicator excessively.

[0009] However, the size of the rod holder is constrained by the size of the container which is generally defined in a standard way and therefore cannot be increased according to the diameter of the rod.

[0010] The one-piece construction of the application element therefore poses some molding and demolding problems, particularly due to large variations in thickness at the connection between the rod and the rod holder.

[0011] In order to overcome these disadvantages, it is known to manufacture the rod and the rod holder in two pieces and to assemble them.

[0012] However, this solution is not very satisfactory, in particular because the sealing skirt can be damaged when assembling the rod in the rod holder, which impairs the sealing function of the skirt.

[0013] One object of the invention is to provide a cosmetic product application device that is simple and economical to manufacture, capable of guaranteeing satisfactory sealing and meeting the desired dimensional specifications.

[0014] To this end, the invention relates to a cosmetic product application device of the aforementioned type, characterized in that the stem holder comprises a closed portion for fixing the first end of the stem centered on a stem holder axis and a sealing skirt centered on the stem holder axis and located axially away from the fixing portion and defining an insertion opening for the first end of the stem.

[0015] A two-piece manufacturing process for the application element offers the advantage of overcoming the molding and demolding problem, particularly when the rod has a large diameter. This two-piece construction allows for simple and economical manufacturing. Furthermore, the axial offset of the fixing portion and the sealing skirt—in other words, providing the fixing portion in a separate axial section, without axial overlap with the sealing skirt—prevents damage to and / or alteration of the sealing skirt's geometry when fixing the rod in the rod holder, thus maintaining a satisfactory seal. In addition, this axial offset allows the rod with a diameter close to the inner diameter of the sealing skirt to be fixed in the rod holder.

[0016] In a particular embodiment of the invention, the rod holder comprises a transverse wall separating the fixing portion and the sealing skirt, the skirt projecting from the transverse wall opposite the fixing portion.

[0017] Such a transverse wall ensures satisfactory separation of the fixing portion and the sealing skirt.

[0018] In a particular embodiment of the invention, the skirt is radially deformable.

[0019] The radial deformability of the sealing skirt improves the seal and provides a soft closing sensation of the container, i.e. presenting little resistance opposing the closure.

[0020] In a particular embodiment of the invention, the length of the sealing skirt represents more than 20% of the sum of the lengths of the fixing portion and the sealing skirt.

[0021] In a particular embodiment of the invention, the inner diameter of the fixing portion is less than the inner diameter of the sealing skirt.

[0022] Such dimensions of the sealing skirt make it possible to guarantee satisfactory dimensions for the realization of its sealing function.

[0023] In a particular embodiment of the invention, the rod holder comprises a ring centered on the axis of the rod holder and defining an internal thread, the sealing skirt extending inside the ring.

[0024] The ring allows the application element to be attached to a container in a cosmetic product packaging assembly. In particular, the ring has an internal thread adapted to cooperate with an external thread provided on a container, for example, on a bottle neck, to ensure that the application element is screwed onto this container. Such a ring can then be called a screw ring. Alternatively, the ring has a snap-on relief adapted to cooperate with a complementary snap-on relief provided on a container, for example, on a bottle neck or shoulder, to ensure that the application element is snapped onto this container.

[0025] In a particular embodiment of the invention, the first end of the rod is intended to be snapped into the fixing portion of the rod holder.

[0026] In a particular embodiment of the invention, the fixing portion includes a protrusion centered on the axis of the rod holder, projecting towards the inside of the fixing portion and defining at least one retaining housing intended to receive at least one tenon provided in the first end of the rod.

[0027] In a particular embodiment of the invention, the fastening portion includes longitudinal ribs formed on at least a part of an internal surface of the fastening portion, the rod including at least one longitudinal projection (96) suitable for engaging between two adjacent longitudinal ribs of the fastening portion.

[0028] Such a structure and a snap-fit ​​of the rod into the rod holder allows for reliable fixing of the rod in the rod holder, while remaining simple to achieve.

[0029] In a particular embodiment of the invention, the rod includes a first guide ring extending radially from the rod, the first ring extending inside the sealing skirt of the rod holder when the first end of the rod is assembled in the fixing portion of the rod holder.

[0030] Such a first guide ring allows the first end of the rod to be guided in the rod holder when the first end of the rod is inserted into the rod holder.

[0031] In a particular embodiment of the invention, the stem comprises an assembly relief, the relief extending axially away from the sealing skirt of the holder- rod when the first end of the rod is assembled in the fixing portion of the rod holder.

[0032] Such an assembly relief defines a stop surface in the axial direction, for example a surface extending in a plane perpendicular to the axis, and makes it possible to form a stop for an assembly tool when inserting the first end of the rod into the rod holder, so that the assembly tool does not come into contact with the sealing skirt during this operation, which could damage it and thus alter the seal between the application member and the container.

[0033] The invention also relates to a packaging assembly for a cosmetic product comprising:

[0034] - a container intended to receive the cosmetic product and comprising a neck ending an opening;

[0035] - a cap intended to close the opening of the container; and

[0036] - a cosmetic product application device as described above, the second end of the stem bearing a cosmetic product applicator.

[0037] The rod holder is intended to be fixed in the cap, when the cap closes the opening of the container, the sealing skirt extending inside the neck.

[0038] In a particular embodiment of the invention, the assembly includes a wringer disposed in the neck of the container, when the hood closes the opening of the container, the sealing skirt being applied in a hermetic manner on the wringer.

[0039] The invention also relates to a method for assembling a cosmetic product application device as described above, the method comprising:

[0040] - a step of inserting the first end of the rod into the insertion opening of the stem holder's sealing skirt, and

[0041] - a step of fixing the first end of the rod in the fixing portion of the stem holder.

[0042] In a particular embodiment of the invention, the method includes a step of axially displacing the rod towards the rod holder by an assembly tool butting against the assembly relief of the rod.

[0043] The invention will be better understood upon reading the following description, given solely by way of example, and made with reference to the accompanying drawings, in which:

[0044] - [Fig. 1] [Fig. 1] is a section along a median axial plane of a set of packaging of a cosmetic product comprising a cosmetic product application device according to the invention;

[0045] - [Fig.2] [Fig.2] is an exploded view of the product application element cosmetic of the [Fig.l] comprising a stem holder and a stem;

[0046] - [Fig.3] [Fig.3] is an enlargement of [Fig.1] at the connection between the stem holder and the stem; and

[0047] - [Fig.4] [Fig.4] is a section along a median axial plane of the stem holder of the [Fig.2],

[0048] Fig. 1 illustrates a cosmetic product packaging assembly 10 comprising a container 12, a cap 14 and a cosmetic product application device 16.

[0049] Preferably, the assembly 10 also includes a wringer 18 disposed in the container 12.

[0050] The cosmetic product intended to be packaged by assembly 10 is, for example, a skincare, coloring, or makeup cosmetic product. It is in liquid or paste form. The cosmetic product is, for example, mascara, lip gloss, or nail polish.

[0051] The container 12 is intended to receive said cosmetic product and includes a neck 20 defining an opening 22.

[0052] The container 12 is for example a bottle or a flask.

[0053] The container 12 extends longitudinally along a principal axis A-A'. Under normal conditions of use, the principal axis A-A' corresponds to a top-bottom axis.

[0054] In particular, the container 12 includes a side wall 24 and a bottom 26 located opposite the neck 20.

[0055] In a known manner, the container 12 is for example made of plastic material, and manufactured in particular by injection molding or by injection and blow molding.

[0056] The container 12 is for example made of polyamide (PA), polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE) or a mixture of these materials, possibly with additives.

[0057] Alternatively, the container 12 can be made in whole or in part from a silicon dioxide-based material, such as glass, and in particular drawn glass.

[0058] The side wall 24 is for example a hollow tube with main axis A-A', as illustrated in [Fig.1].

[0059] The internal volume of the container 12, defined within the side wall 24 and delimited at the top by the neck 20 and at the bottom by the base 26, is suitable for receiving the cosmetic product. The internal volume opens externally through the opening 22 defined in the neck 20.

[0060] The internal volume of the container 12 may, for example, have a capacity of between 4 mL and 20 mL, particularly when it is intended to contain a makeup product, such as mascara, lip balm, gloss, or the like. However, the internal volume of the container 12 may have a capacity of, for example, up to 150 mL, particularly when it is intended to contain a skincare cream or serum, or a foundation.

[0061] The neck 20 is advantageously cylindrical with a circular cross-section centered on the axis principal A-A'.

[0062] Alternatively, the collar 20 has a non-circular, for example square, cross-section.

[0063] An external thread 28 is advantageously provided on the neck 20.

[0064] Alternatively, the collar 20 does not include an external thread 28, but is provided for example, a ratchet relief.

[0065] As illustrated in [Fig.1], the opening 22 defined by the collar 20 is advantageously centered on the main axis A-A', and opens more particularly upwards.

[0066] The opening 22 is for example circular in shape with a diameter between 3 mm and 20 mm.

[0067] Alternatively, the opening 22 has a non-circular, for example square, cross-section.

[0068] As illustrated in [Fig.1], the wringer 18 is arranged in the neck 20 of the container 12.

[0069] The wringer 18 includes for example a side wall 30 disposed in the neck 20, and in particular laterally supported against an internal surface of the neck 20.

[0070] The side wall 30 of the wringer 18 is for example a hollow sleeve with main axis A-A'.

[0071] The side wall 30 of the wringer 18 advantageously includes at least one radial wringing projection 32 defined on an internal surface of the wringer 18.

[0072] Preferably, the wringer 18 includes a collar 34 for fixing in a flat bearing against an upper surface of the neck 20.

[0073] The cap 14 is intended to close the opening 22 defined in the neck 20 of the container 12.

[0074] The hood 14 extends longitudinally along a principal axis, which coincides with the main axis A-A', when the hood 14 closes the opening 22, as illustrated in [Fig.1].

[0075] The hood 14 includes a side wall 38, a closing wall 40 located at a first end of the hood 14 situated away from the container 12, and an annular front edge 42 located at a second end of the hood 14 and defining an opening 44.

[0076] The hood 14 is advantageously hollow and defines an internal volume 46 inside the side wall 38, delimited at the top by the closing wall 40 and open at the bottom by the opening 44.

[0077] When the hood 14 closes the opening 22, the front edge 42 is in contact with the container 12, or at least opposite the container 12 along the main axis A-A', and the neck 20 is located in the internal volume 46 of the hood 14.

[0078] The opening 44 defined by the front edge 42 is for example circular in shape with a diameter between 4 mm and 30 mm.

[0079] Alternatively, the opening 44 has a non-circular section, for example square.

[0080] As is known, the hood 14 is for example made of plastic material, and manufactured in particular by injection molding.

[0081] The cosmetic product application organ 16 includes a rod 50 intended to be inserted into the container 12 and a rod holder 52 intended to carry a first end 51 of the rod 50, by being assembled to the cap 14.

[0082] The cosmetic product application organ 16 further includes preferably an applicator 54 fixed to a second end 53 of the rod 50 opposite to the first end 51 of the rod 50.

[0083] As will be seen below, the rod 50 and the rod holder 52 are made of two separate pieces assembled one on top of the other.

[0084] The cosmetic product application organ 16 is mounted movable through the opening 22 in an insertion direction between a picking position and an application position.

[0085] The insertion direction extends for example along the main axis A-A' of the container 12.

[0086] In the picking position, as illustrated in [Fig.1], the cosmetic product application organ 16 is located inside the container 12 so as to be at least partially in contact with the cosmetic product.

[0087] In the sampling position, the cap 14 closes the opening 22 and the rod 50 is located inside the container 12.

[0088] In the application position, the cap 14 leaves the opening 22 of the container 12 free and open, the cosmetic product application element 16 is extracted from the container 12 and is suitable for being brought near or into contact with a body surface, in order to apply a quantity of cosmetic product taken from it.

[0089] The applicator 54 is suitable for extracting a quantity of cosmetic product, particularly in the organ 16 sampling position.

[0090] For this purpose, in the picking position, the applicator 54 is advantageously in contact with the cosmetic product.

[0091] The applicator 54 is capable of applying the quantity of product to a body surface in order to obtain the desired effect, in particular in the application position of the organ 16.

[0092] The applicator 54 is preferably adapted to the cosmetic product to be applied.

[0093] The applicator 54 is, for example, a mascara brush, or a brush or a nozzle flocked, designed for applying lip gloss.

[0094] The rod holder 52 is fixed in the hood 14, so that the application member 16 is integral with the hood 14.

[0095] As illustrated in [Fig.1], the rod holder 52 is inserted into the internal volume 46 through the opening 44 of the hood 14.

[0096] Once fixed, the rod holder 52 is positioned laterally against the inner surface of the side wall 38 of the hood 14.

[0097] With reference for example to [Fig.3], the rod holder 52 includes a fixing portion 72 and a sealing skirt 74 centered on a rod holder axis B-B'.

[0098] In the example illustrated in the figures, the rod holder 52 also includes a screw ring 58 centered on the rod holder axis B-B'.

[0099] When the hood 14, in which the application member 16 is fixed, closes the opening 22 of the container 12, particularly in the sampling position illustrated in [Fig.1], the axis of the rod holder B-B' is substantially coincident with the main axis A-A'.

[0100] The rod holder 52 is for example made of plastic material, and in particular manufactured by injection molding.

[0101] Preferably, the rod holder 52 is made of a plastic material, for example of polyethylene terephthalate (PBT), polyethylene terephthalate (PET), polyoxymethylene (POM), polyolefin, in particular polypropylene (PP) having a flexural modulus greater than 1500 MPa, or a mixture of these materials, possibly with additives.

[0102] Advantageously, the rod holder 52 is made of the same material as the container 12 and the cap 14.

[0103] The screw ring 58 comprises a side wall 60 and an upper transverse wall 62.

[0104] The side wall 60 is a hollow sleeve centered on the axis of the rod holder B-B'. It defines an internal surface 64 and an external surface 66 which are substantially cylindrical.

[0105] The screw ring 58 is intended to be screwed onto the neck 20 of the container 12, so that the cap 14, in which the rod holder 52 is mounted, closes the opening 22 in the sampling position.

[0106] For this purpose, the ring 58 defines an internal thread 68 suitable for screwing onto the external thread 28 of the neck 20 of the container 12.

[0107] Alternatively, the ring 58 is intended to be snapped onto the neck 20 of the container 12. In this particular embodiment, the ring 58 does not include an internal thread 68 but, for example, a snap-on relief adapted to cooperate with a complementary snap-on relief provided on the neck 20 of the container 12.

[0108] Alternatively, the ring 58 is intended to be fixed to the neck 20 of the container 12 by a magnetic closure.

[0109] As illustrated in [Fig.3], the internal thread 68 is defined on the internal surface 64 of the side wall 60 of the screw ring 58 of the rod holder 52.

[0110] The external surface 66 of the side wall 60 of the screw ring 58 is intended to bear laterally against the internal surface of the side wall 38 of the cover 14, of so as to fix the rod holder 52 in the hood 14.

[0111] The screw ring 58 has, for example, an inner diameter substantially equal to the diameter of the opening 22 of the container 12 and an outer diameter substantially equal to the diameter of the opening 44 of the hood 14.

[0112] Advantageously, as illustrated in [Fig.3], a hook 70 is provided on the screw ring 58. The hook 70 is able to snap into place on a stop, for example, defined on the neck 20 of the container 12. At the end of the screwing stroke of the screw ring 58 on the neck 20, such snapping provides the user with an audible and tactile sensation of closure.

[0113] The upper transverse wall 62 of the screw ring 58 is for example intended to bear flat against the collar 34 of the wringer 18 when the hood 14, in which the application member 16 is fixed, closes the opening 22 of the container 12.

[0114] In the example illustrated in the figures, the fixing portion 72 and the sealing skirt 74 are separated by the upper transverse wall 62 of the screw ring 58.

[0115] More specifically, the fixing portion 72 includes a side partition 78 and a top partition 80.

[0116] The side partition 78 is for example a hollow tube centered on the axis of rod holder B-B' and defines an internal surface 79.

[0117] As illustrated in [Fig.3], the upper partition 80 of the fixing portion 72 extends substantially parallel to and away from the upper transverse wall 62 of the ring 58.

[0118] The fixing portion 72 protrudes upwards to the upper partition 80 beyond the upper transverse wall 62 of the screw ring 58.

[0119] The fixing portion 72 defines a closed fixing region of the first end 51 of the rod 50, as will be described below.

[0120] As illustrated in [Fig.3], the fastening portion 72 preferably includes a protrusion 82 centered on the axis of the rod holder B-B', projecting inwards from the fastening portion 72 and defining at least one retaining housing 84.

[0121] More particularly, the protuberance 82 is provided under the upper partition 80 and has a rounded apex centered on the axis of the rod holder B-B'.

[0122] The fastening portion 72 advantageously also includes an annular retaining bead 86 projecting from the lateral partition 78 into the interior of the fastening portion 72.

[0123] As illustrated in [Fig.3], the retaining housing 84 is annular in shape. It is laterally delimited between the protrusion 82 and the lateral partition 78 and is delimited along the axis of the rod holder B-B' between the annular retaining bead 86 and the upper partition 80 of the fixing portion 72.

[0124] The fastening portion 72 further includes longitudinal ribs 88 formed on at least part of an internal surface 71 of the fastening portion 72.

[0125] The longitudinal ribs 88 extend in a direction parallel to the axis of the rod holder B-B', and only on the attachment portion 72.

[0126] The length of the fixing portion 72 is for example between 5 mm and 30 mm.

[0127] The sealing skirt 74 is located axially away from the fixing portion 72 and defines an opening 90 for insertion of the first end 51 of the rod 50.

[0128] In particular, the sealing skirt 74 protrudes from the upper transverse wall 62 opposite the fixing portion 72.

[0129] The sealing skirt 74 extends in an axial portion distinct from the fixing portion 72, without axial overlap with it.

[0130] As illustrated in [Fig.3], the sealing skirt 74 extends inside the ring 58.

[0131] More particularly, the sealing skirt 74 and the internal surface 64 of the ring 58 define between them an annular space 92.

[0132] When the hood 14 closes the opening 22 of the container 12 as illustrated in [Fig.1], the sealing skirt 74 extends inside the neck 20 of the container 12.

[0133] In particular, when the hood 14 closes the opening 22 of the container 12, the neck 20 of the container 12 and the wringer 18 extend into the annular space 92.

[0134] The sealing skirt 74 defines a sealing region, more particularly between the container 12 and the rod holder 52 when the hood 14 closes the opening 22 of the container 12.

[0135] In other words, the sealing skirt 74 of the rod holder 52 has the role of blocking the cosmetic product in the internal volume of the container 12 when the cap 14 closes the opening 22 of the container 12.

[0136] Advantageously, when the hood 14 closes the opening 22 of the container 12, the sealing skirt 74 is applied in a hermetic manner to the wringer 18.

[0137] As illustrated in [Fig. 1], in the sampling position, the sealing skirt 74 is, for example, in a tight seal against an internal surface of the wringer 18, in particular to ensure sealing. In at least one section perpendicular to the axis A-A', the sealing skirt 74 has a contour conjugate to the contour of the internal surface of the wringer 18.

[0138] Preferably, the sealing skirt 74 is radially deformable.

[0139] More particularly, the sealing skirt 74 is suitable for being deformed radially towards the axis of the rod holder B-B' in order to ensure the sealing of the support against the internal surface of the wringer 18.

[0140] Furthermore, the radial deformability of the sealing skirt 74 allows for a smooth closing sensation of the container 12, i.e., one offering little resistance opposing the closure.

[0141] Advantageously, the sealing skirt 74 has a low thickness, in particular between 0.4 mm and 2 mm.

[0142] Preferably, the length of the sealing skirt 74 represents more than 20% of the sum of the lengths of the fixing portion 72 and the sealing skirt 74.

[0143] The length of the sealing skirt 74 is for example between 2 mm and 20 mm.

[0144] As can be seen in [Fig.3], the inner diameter of the sealing skirt 74 is advantageously greater, in particular by a functional clearance of at least 0.2 mm, than the diameter of the portion of the rod 50 intended to be inserted into the sealing skirt 74. For example, the inner diameter of the sealing skirt 74 is between 4 mm and 8 mm.

[0145] This difference in diameter allows the first end 51 of the rod 50 to be inserted into the sealing skirt 74 without coming into contact with it, which could damage it and compromise the seal. Furthermore, such a diameter of the sealing skirt 74 ensures sufficient flexibility.

[0146] The rod 50 includes for example a fixing portion 55 comprising the first end 51 and a joining portion 57 connecting the fixing portion 55 and the second end 53.

[0147] The fixing portion 55 preferably extends in a straight line along a rod axis C-C'.

[0148] In the example illustrated in the figures, the rod 50 extends in a straight line along the rod axis C-C' between its first end 51 and its second end 53. The joining portion 57 extends in a straight line along the rod axis C-C'. Alternatively, the joining portion 57 is curved.

[0149] Advantageously, the rod 50 is made of the same material as the rod holder 52, and preferably as the container 12 and the cap 14.

[0150] Preferably, the rod 50 is made of a plastic material, for example of polyethylene terephthalate (PBT), polyethylene terephthalate (PET), polyoxymethylene (POM), polyolefin, in particular polypropylene (PP) having a flexural modulus greater than 1500 MPa, or a mixture of these materials, possibly with additives.

[0151] The fixing portion 55 of the rod 50 has, for example, a diameter between 3 mm and 6 mm.

[0152] The fixing portion 55 of the rod 50 is intended to be inserted into the rod holder 52.

[0153] When the rod 50 is assembled in the rod holder 52, the fastening portion 55 extends inside the stem holder 52.

[0154] The first end 51 of the rod 50 is intended to be assembled in the rod holder 52, and more particularly in the fixing portion 72 of the rod holder 52, as illustrated in [Fig.1].

[0155] More particularly, the first end 51 of the rod 50 is intended to be snapped into the fixing portion 72 of the rod holder 52.

[0156] In other words, the fixing portion 72 of the rod holder 52 is suitable for receiving the first end 51 of the rod 50 and locking it in position.

[0157] For this purpose, the retaining housing 84 defined in the fixing portion 72 of the rod holder 52 is intended to receive two tenons 94 provided in the first end 51 of the rod 50.

[0158] The two tenons 94 extend in a direction parallel to the axis of the rod C-C' and give a fork shape to the first end 51 of the rod 50.

[0159] More particularly, when the fixing portion 55 of the rod 50 is inserted into the fixing portion 72 of the rod holder 52, the tenons 94 are able to deform elastically towards the axis of the rod C-C', so as to come to rest in the retaining housing 84, and then to return to a rest position, in which each tenon 94 is thus locked in the retaining housing 84. Such a cooperation of form axially locks the first end 51 of the rod 50 in position in the rod holder 52.

[0160] When the rod 50 is assembled in the rod holder 52, the axis of the rod holder B-B' and the axis of the rod C-C' are substantially coincident.

[0161] Advantageously, the rod 50 further includes longitudinal projections 96 provided on the first end 51 of the rod 50, below the tenons 94.

[0162] The longitudinal projections 96 extend in a direction parallel to the axis of the rod C-C'.

[0163] The longitudinal projections 96 are suitable to fit between two longitudinal ribs 88 of the fixing portion 72 of the rod holder 52 when the first end 51 of the rod 50 is assembled in the rod holder 52.

[0164] Such an assembly of the projections 96 in the ribs 88 blocks the rotation of the rod 50 in the rod holder 52, which could damage the snap-fit ​​connection between the rod 50 and the rod holder 52, particularly when screwing and unscrewing the ring 58 onto the neck 20 of the container 12.

[0165] Alternatively, the blocking of the rotation of the rod 50 in the rod holder 52 is achieved by cooperation of a non-circular section of the fixing portion 72 with a non-circular section of the fixing portion 55 of the rod 50 near the first end 51.

[0166] Alternatively, the assembly of the first end 51 of the rod 50 in the rod holder 52 is carried out by screwing, gluing or welding, in particular by ultrasonic welding, so as to block the translation and rotation of the fixing portion 55 of the rod 50 in the rod holder 52.

[0167] Optionally, the rod 50 includes a first guide ring 98 extending radially from the rod 50.

[0168] The first ring 98 extends inside the sealing skirt 74 of the rod holder 52 when the first end 51 of the rod 50 is assembled in the fixing portion 72 of the rod holder 52.

[0169] In particular, as illustrated in [Fig.1], in the assembly position of the rod 50 in the rod holder 52, the first ring 98 extends against the upper transverse wall 62 of the screw ring 58. The first ring 98 thus acts as an axial insertion stop cooperating with the transverse wall 62 of the rod holder 52 to limit the insertion of the rod 50 into the rod holder 52.

[0170] Preferably, the outer diameter of the first guide ring 98 is substantially equal, within a functional clearance of insertion and / or flexibility in the radial direction of the sealing skirt 74, to the inner diameter of the sealing skirt 74 of the rod holder 52.

[0171] Furthermore, the rod 50, and more particularly the fixing portion 55, advantageously includes an assembly relief 100 extending preferably axially away from the first guide ring 98.

[0172] In particular, the assembly relief 100 extends for example axially away from the sealing skirt 74 of the rod holder 52 when the first end 51 of the rod 50 is assembled in the fixing portion 72 of the rod holder 52.

[0173] The assembly relief 100 preferably defines a stop surface perpendicular to the axis of the rod C-C' configured to form a stop for an assembly tool.

[0174] In the example illustrated in the figures, the assembly relief 100 is, for example, a ring extending in radial projection externally from the stem 50.

[0175] Alternatively, the assembly relief 100 is a ring or groove extending in the hollow of the stem 50 or a flat surface formed on the stem 50.

[0176] A method for assembling the cosmetic product application organ 16 will now be described.

[0177] A rod holder 52 and a rod 50 as described above are supplied beforehand.

[0178] For example, the rod holder 52 is pre-molded by plastic injection in a molding cavity, and more particularly from a thermoplastic material.

[0179] The rod 50 is for example pre-molded flat by plastic injection and more particularly by injection of the same material as the rod holder.

[0180] The method includes a step of inserting the first end 51 of the rod 50 into the insertion opening 90 of the sealing skirt 74 of the rod holder 52.

[0181] To this end, the method advantageously includes a step of axially displacing the rod 50 towards the rod holder 52 by means of an assembly tool abutting against the relief assembly 100 of the rod 50.

[0182] More particularly, the rod holder 52 and the rod 50 are preferably positioned so that the axis of the rod B-B' and the axis of the rod holder C-C' coincide, as illustrated in [Fig.2].

[0183] The assembly tool, which is for example a clamp or a tube, butts against the assembly relief 100 of the rod 50 so as to move the rod 50 along the axis of the rod holder C-C', in particular until the first guide ring 98 butts against the upper transverse wall 62 of the screw ring 58.

[0184] During axial movement of the rod 50, the first end 51 of the rod 50 is advantageously moved inside the sealing skirt 74 without coming into contact with the internal surface of the sealing skirt 74 until it is inserted into the fixing portion 72. The sealing skirt 74 is thus not damaged by the rod 50 when the rod 50 is inserted into the rod holder 52.

[0185] The method further includes a step of fixing the first end 51 of the rod 50 in the fixing portion 72 of the rod holder 52.

[0186] More particularly the first end 51 of the rod 50 is snapped into the rod holder 52, and more specifically into the fixing portion 72 of the rod holder 52.

[0187] For this purpose, when the rod 50 is inserted into the rod holder 52, the tenons 94 at the first end 51 of the rod 50 are elastically deformed so as to fit into the retaining housing 84. Each tenon 94 then returns to its rest position and thus remains locked in the retaining housing 84. Such a form cooperation locks the first end 51 of the rod 50 in position in the rod holder 52 along the axis BB' of the latter. During this insertion, the longitudinal projections 96 provided on the rod also come to be housed between two longitudinal ribs 88 of the fixing portion 72 of the rod holder 52 when the first end 51 of the rod 50 is assembled in the rod holder 52. Such a cooperation of form blocks rotation of the first end 51 of the rod 50 relative to the rod holder 52 around its axis B-B'.

[0188] Moreover, a two-piece manufacturing of the application member 16 offers the advantage of overcoming the problem of molding and demolding, in particular in the case where the rod 50 has a large diameter.

[0189] This two-piece construction allows for simple and economical manufacturing.

[0190] Furthermore, during the assembly process, the assembly tool is not in contact with the sealing skirt 74 of the rod holder 52. As a result, the sealing skirt 74 of the rod holder 52 is not damaged during the assembly process and its sealing function is not impaired.

Claims

Demands

1. Cosmetic product application element (16) comprising: - a stem holder (52); and - a rod (50) defining a first end (51) and a second end (53) opposite the first end (51), the second end (53) of the rod (50) being intended to carry a cosmetic product applicator (54), characterized in that the rod holder (52) comprises a closed portion (72) for securing the first end (51) of the rod (50) centered on a rod holder axis (B-B') and a sealing skirt (74) centered on the rod holder axis (B-B') and located axially away from the securing portion (72) and defining an insertion opening (90) for the first end (51) of the rod (50), in that the rod holder (52) comprises a ring (58) centered on the rod holder axis (B-B') and defining an internal thread (68), the sealing skirt (74) extending to the inside of the ring (58),and in that the rod (50) comprises an assembly relief (100), the relief (100) extending axially away from the sealing skirt (74) of the rod holder (52) when the first end (51) of the rod (50) is assembled into the fixing portion (72) of the rod holder (52).

2. Application member (16) according to claim 1, wherein the rod holder (52) comprises a transverse wall (62) separating the fixing portion (72) and the sealing skirt (74), the skirt (74) projecting from the transverse wall (62) opposite the fixing portion (72).

3. Application member (16) according to claim 1 or 2, wherein the skirt (74) is radially deformable.

4. Application member (16) according to any one of the preceding claims, wherein the length of the sealing skirt (74) represents more than 20% of the sum of the lengths of the fixing portion (72) and the sealing skirt (74).

5. Application member (16) according to any one of the preceding claims, wherein the inner diameter of the fixing portion (72) is less than the inner diameter of the sealing skirt (74).

6. Application member (16) according to any one of the preceding claims, wherein the first end (51) of the rod (50) is intended to be snapped into the fixing portion (72) of the rod holder (52).

7. Application member (16) according to any one of the preceding claims, wherein the fixing portion (72) comprises a protrusion (82) centered on the axis of the rod holder (B-B'), projecting inwards from the fixing portion (72) and defining at least one retaining housing (84) intended to receive at least one tenon (94) provided in the first end (51) of the rod (50).

8. Application member (16) according to any one of the preceding claims, wherein the fastening portion (72) comprises longitudinal ribs (88) formed on at least a part of an internal surface of the fastening portion (72), the stem (50) comprising at least one longitudinal projection (96) adapted to engage between two adjacent longitudinal ribs (88) of the fastening portion (72).

9. Application member (16) according to any one of the preceding claims, wherein the rod (50) comprises a first guide ring (98) extending radially from the rod (50), the first ring (98) extending inside the sealing skirt (74) of the rod holder (52) when the first end (51) of the rod (50) is assembled in the fixing portion (72) of the rod holder (52).

10. A cosmetic product packaging assembly (10) comprising: - a container (12) for receiving the cosmetic product and including a neck (20) defining an opening (22); - a cap (14) for closing the opening (22) of the container (12); and - a cosmetic product application device (16) according to any one of the preceding claims, the second end (53) of the rod (50) carrying a cosmetic product applicator (54), the rod holder (52) being intended to be fixed in the cap (14), when the cap (14) closes the opening (22) of the container (12), the sealing skirt (74) extending inside the neck (20).

11. Packaging assembly (10) according to claim 10 comprising a wringer (18) disposed in the neck (20) of the container (12), when the hood (14) closes the opening (22) of the container (12), the sealing skirt (74) being applied in a hermetic manner over the wringer (18).

12. A method for assembling a cosmetic product application device (16) according to any one of claims 1 to 19, the method comprising: - a step of inserting the first end (51) of the rod (50) into the insertion opening (90) of the sealing skirt (74) of the rod holder (52), and - a step of fixing the first end (51) of the rod (50) in the fixing portion (72) of the rod holder (52).

13. Assembly method according to claim 12, wherein the application member (16) is according to claim 11, the method comprising an axial displacement step of the rod (50) towards the rod holder (52) by an assembly tool butting against the assembly relief (100) of the rod (50).

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