Packaging device with offset clamping zone, and associated assembly method

Abstract

Packaging Device with Offset Clamping Zone, and Associated Assembly Method. The present invention relates to a packaging device (10) for cosmetic products comprising a main body (12) and a dispensing nozzle (14), the main body (12) having a neck (20). The dispensing nozzle (14) is inserted into the neck (20), such that the packaging device (10) has a clamping zone in which the dispensing nozzle (14) exerts a radial force on the neck (20). The distance between the clamping zone and a distal end (24) of the neck (20) is greater than or equal to one-quarter of the inner diameter (D) of the neck (20) in the clamping zone, the dispensing nozzle (14) not exerting a radial force on the neck (20) either between the clamping zone and the distal end (24), or on the distal end (24). The invention further relates to an associated assembly method. Figure for the abridged version: Fig 1

Description

Title of the invention: Packaging device with remote clamping zone, and associated assembly method

[0001] The present invention relates to a cosmetic product packaging device comprising a main body and a dispensing nozzle, the main body having a neck delimiting an opening in which the dispensing nozzle is arranged, the main body having a distal end, the distal end forming a free edge of the neck, the dispensing nozzle being inserted into the neck, so that the packaging device has a clamping zone in which the nozzle exerts a radial force on the neck.

[0002] Packaging device means any packaging which allows the sale, transport, protection and storage of the product it contains.

[0003] A cosmetic product is advantageously 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.

[0004] The product contained in the device according to the invention is, for example, a makeup product, such as a foundation, or a cream or serum for the surface of the epidermis.

[0005] The realization of such a conditioning device is known, in which the main body is made of copolyester, in particular a semi-aromatic copolyester, such as polyethylene terephthalate (PET) and the tip is made of a more resilient material, for example polyolefin, such as polyethylene (PE).

[0006] In such a prior art device, the clamping area between the tip and the main body is located at the free edge of the neck.

[0007] The clamping area allows for fixing and sealing between the tip and the main body.

[0008] The more resilient material allows the stress to be absorbed in the clamping zone, which is located at the distal end. Thus, the stress is not transmitted to the constituent material of the main body at the neck.

[0009] However, the use of a polyolefin-type material for the nozzle complicates any possible recycling, at least partial, of the packaging device.

[0010] The proposal of eco-responsible, environmentally friendly solutions whose design and development take into account environmental issues is becoming a major concern in order to help meet global challenges.

[0011] It is therefore essential to design more durable products, thereby reducing the amount of materials used and / or replacing them with more durable materials. concerned about the environment and / or using recyclable materials in order to reduce the product's carbon footprint.

[0012] In this context, it is important to offer recyclable packaging containing in particular separable elements and / or made of a minimum of materials and / or free from materials that are difficult to recycle in order to facilitate their end of life.

[0013] Thus, it is necessary to develop packaging made of environmentally friendly recyclable materials to allow for the recovery of packaging at the end of its life and to avoid pollution of recycling channels.

[0014] The aim of the invention is therefore to propose a cosmetic product packaging device, offering the possibility of providing better recyclability of the device, while preserving the integrity and reliability of the airtight assembly between the nozzle and the main body.

[0015] To this end, the invention relates to a conditioning device as described above, in which the distance between the clamping zone and the distal end is greater than or equal to one quarter of the internal diameter of the neck in the clamping zone, preferably greater than or equal to one third of the internal diameter of the neck in the clamping zone, the tip not exerting a radial force on the neck, either between the clamping zone and the distal end, or on the distal end.

[0016] By positioning the clamping zone away from the free edge, it is possible to limit the forces applied to the neck near the free edge, which is a relatively fragile area. The minimum distance between the clamping zone and the free edge is particularly relevant with regard to diverting forces away from the fragile area, taking into account the curvature of the neck.

[0017] Thus, this offers, for example, the possibility of using the same material, for example PET, for the main body and the nozzle. Using the same material facilitates recycling. However, by using the same material, the nozzle no longer has additional resilience compared to the neck, so it no longer absorbs the radial clamping force between the nozzle and the main body to ensure a reliable and leak-proof assembly of these elements. This radial force is then transferred to the neck. With a clamping zone located at the free edge of the main body, this is likely to cause the free edge to flare, possibly resulting in the appearance of crack(s).Such a phenomenon of flare-up, or even cracking of the neck of the main body, is all the more likely to occur when the cosmetic product contained within the main body and intended to be dispensed through the nozzle contains alcohol or a higher branched alkane, such as isododecane. Thus, by providing a clamping zone at the intended distance from the free edge, the radial clamping forces are exerted on the neck at a distance from the relatively fragile zone, a relatively fragile zone located near the free edge. which greatly reduces the risk of flare, and thus of cracking, including when the tip and the main body are made of the same material, for example PET, which is a material that is particularly well recycled in the world.

[0018] In the case where the internal diameter of the neck is not constant in the axial portion in which the clamping zone extends, the distance between the clamping zone and the distal end is greater than or equal to one quarter of the minimum internal diameter in the clamping zone, preferably greater than or equal to one third of the minimum internal diameter in the clamping zone.

[0019] According to other advantageous aspects of the invention, the conditioning device comprises one or more of the following features, taken individually or in all technically possible combinations:

[0020] - the main body and the dispensing nozzle are made of the same material, more specifically in polyethylene terephthalate (PET);

[0021] This improves the recyclability of the packaging device itself. Since the nozzle and the main body are made of the same material, these two components of the packaging device can be placed in the same recycling stream, notably without requiring prior disassembly. PET is also a material that is easily and widely recyclable. Furthermore, PET has a Young's modulus greater than 1.5 GPa, is transparent, and is sufficiently strong to form a main body containing the cosmetic product, which maintains its shape with a standard thickness (except in the case of a deformable portion specifically designed to deform).Furthermore, the use of PET to form the main body and the nozzle is particularly advantageous because this material has good compatibility with a wide range of cosmetic products intended to be contained within the main body and to be dispensed through the nozzle.

[0022] - the collar has a thickness in the tightening area, the distance between the area of tightening and the distal end being greater than or equal to twice the thickness of the neck in the tightening zone;

[0023] Such a distance is also suitable for reducing the radial forces applied to the relatively fragile area located near the free edge of the neck.

[0024] - the dispensing nozzle and the neck do not have radial contact between the area of tightening and the distal end and at the distal end;

[0025] Thus, in the absence of radial contact, the distribution nozzle does not apply radial force on the neck between the clamping area and the free edge, nor at the free edge.

[0026] - the dispensing nozzle has a circumferential relief on an outer surface at the tightening area and / or the collar has a circumferential relief on an inner surface at the tightening area;

[0027] The circumferential relief allows the application of a radial clamping force by forceful insertion between the tip and the main body.

[0028] - the dispensing nozzle has a circumferential relief on an ex surface external, the circumferential relief cooperating with a clamping portion of an internal surface of the neck in the clamping zone, so that the circumferential relief presses against said clamping portion of the internal surface;

[0029] The circumferential relief against the clamping portion allows the application of a radial clamping force by forcibly inserting the tip into the opening, and in addition, in the present case, a seal.

[0030] - the inner surface of the neck has a ratcheting relief between the end distal and the clamping portion, the internal diameter of the neck at the level of the snap-on relief being strictly less than the external diameter of the distribution tip at the level of the circumferential relief;

[0031] This allows the tip to be clicked into the neck, i.e. the click relief forms an axial stop preventing unintentional disengagement of the tip from the main body.

[0032] - the main body has a shoulder, the neck extending between the shoulder and at the distal end, the distance between the clamping zone and the distal end is greater than or equal to one third of the longitudinal distance between the shoulder and the distal end.

[0033] Such a distance is also suitable for reducing the radial forces applied to the relatively fragile area located near the free edge of the neck.

[0034] The invention further relates to a method for assembling a conditioning device as previously described, comprising the following steps:

[0035] - supply of a main body, the main body having a neck delimiting a opening, the main body having a distal end, the distal end forming a free edge of the neck,

[0036] - supply of a dispensing nozzle, and

[0037] - forceful insertion of the dispensing nozzle into the neck, so that the nozzle of distribution is arranged in the opening and until the distribution nozzle and the main body cooperate in a clamping zone in which the distribution nozzle exerts a radial force on the neck, in which the distance between the clamping zone and the distal end is greater than or equal to one quarter of the inside diameter of the neck in the clamping zone, preferably greater than or equal to one third of the inside diameter of the neck in the clamping zone, the distribution nozzle not exerting a radial force on the neck either between the clamping zone and the distal end, or on the distal end.

[0038] This assembly method may also have the following characteristic:

[0039] - when the dispensing nozzle is inserted into the neck, the circumferential relief extends beyond the snap-in relief, so that after insertion, the snap-in relief extends between the circumferential relief and the distal end.

[0040] The invention will become clearer upon reading the following description, given solely by way of non-limiting example, and made with reference to the drawings in which:

[0041] [Fig-1] [Fig.1] is a partial cross-sectional view of a conditioning device according to an example of an embodiment of the invention,

[0042] [Fig.2] [Fig.2] is an enlarged view of frame A of [Fig.1], and

[0043] [Fig.3] [Fig.3] is a partial cross-sectional view of a conditioning device according to a second embodiment of the invention.

[0044] An example of a cosmetic product packaging device 10 according to the invention is partially shown in Figures 1 and 2.

[0045] The conditioning device 10 comprises a main body 12 and a dispensing nozzle 14.

[0046] The main body 12 is adapted to contain the cosmetic product.

[0047] The main body 12 delimits a receiving volume 16 for the cosmetic product.

[0048] The main body 12 includes a side wall 18 delimiting at least partially the receiving volume 16.

[0049] The main body 12 extends here mainly along a principal axis X.

[0050] The side wall 18 has, for example, a rotational symmetry about the principal axis X.

[0051] Alternatively, the side wall 18 extends around the principal axis X, each section of the side wall perpendicular to the principal axis X having a shape. The shape is, for example, an oval, a square, or any polygon.

[0052] The main body 12 has a neck 20 delimiting an opening 22.

[0053] The opening 22 forms an outlet for the cosmetic product contained in the body main 12, more specifically in the receiving volume 16.

[0054] The main body 12 has a distal end 24, more particularly here along the main axis X.

[0055] The distal end 24 forms a free edge of the neck 20.

[0056] The collar 20 has an inner surface 26, and here an outer surface 28.

[0057] The inner surface 26 and the outer surface 28 are here delimited by the same wall, here surrounding the main X axis.

[0058] The collar 20 extends around the main axis X.

[0059] The opening 22 extends along the principal axis X.

[0060] More specifically, the collar 20 has a rotational symmetry about the principal axis X.

[0061] The neck 20 here has an internal diameter, defined at the level of the internal surface 26, for any plane perpendicular to the principal axis X passing through the distal end 24.

[0062] The inner surface 26 of the collar 20 has a clamping portion 30.

[0063] The clamping portion 30 is adapted such that, when the tip 14 is inserted into the neck 20, then the tip 14 exerts a radial force on the clamping portion 30.

[0064] More particularly, the opening 22 has a reduced passage section at the clamping portion 30 compared to the passage section between the distal end 24 and the clamping portion 30 (excluded), except for a possible snap-fit ​​relief, as described below, if applicable.

[0065] More particularly here, the collar 20 has an internal diameter, defined at the level of the internal surface 26, measured at every point of the clamping portion 30 strictly less than the internal diameter of the collar 20 between the distal end 24 and the clamping portion 30 (excluded), with the exception of a possible snap-fit ​​relief, as described below, if applicable.

[0066] The clamping portion 30 of the collar 20 here presents a circumferential relief.

[0067] The inner surface 26 of the collar 20 here also presents a ratchet relief 32 between the distal end 24 and the clamping portion 30.

[0068] More particularly, the opening 22 has a reduced passage section at the level of the snap-in relief 32 compared to the passage section at the level of the clamping portion 30.

[0069] More particularly here, the collar 20 has an internal diameter measured at every point of the snap-in relief 32 strictly less than the internal diameter of the collar 20 in the clamping portion 30.

[0070] The snap-fit ​​relief 32 extends over a circumference of the inner surface 26 of the neck 20.

[0071] The snap-on relief 32 is, for example, a relief extending over the entire circumference.

[0072] Alternatively, the snap-on relief 32 comprises a plurality of reliefs distributed over the entire circumference.

[0073] The snap-on relief 32 here has a shape to allow the passage of a relief, here the circumferential relief 44 described below, from the distal end towards the clamping zone 30 and to block said relief in the opposite direction.

[0074] The snap-on relief 32 has two edges arranged on either side along the direction of the main axis.

[0075] The snap-on relief 32 has, for example, a height that increases more gradually on its edge closest to the distal end 24 than on its other edge.

[0076] The snap-in relief 32 is, for example, here adjacent to the clamping portion 30.

[0077] Here, the inner diameter of the neck 20 decreases from the clamping portion 30 to the snap-in relief 32, then increases to one or more values ​​strictly greater than the inner diameter of the neck in the clamping portion 30.

[0078] Alternatively, the snap-on relief 32 extends in any other location between the clamping portion 30 and the distal end 24.

[0079] In an alternative embodiment, the inner diameter of the neck 20 at the level of the clamping portion 30 is, for example, substantially equal to the inner diameter of the neck 20 in an area between the clamping portion (excluded) and the distal end 24, more particularly between the snap-on relief 32 (excluded) and the distal end 24.

[0080] In the example shown, the main body 12 has a shoulder 34, the neck 20 extending between the shoulder 34 and the distal end 24.

[0081] Alternatively, the neck 20 extends in the continuation of the main body 12, the neck 20 being aligned with the lateral wall 18 along the main axis X.

[0082] The collar 20 has a thickness e in the clamping portion 30.

[0083] The thickness e corresponds to the distance between the inner surface 26 and the outer surface 28 of the collar 20 in the clamping portion 30.

[0084] If said distance is variable in the clamping portion 30, the thickness e is equal to the average distance between the inner surface 26 and the outer surface 28 of the neck 20 in the clamping portion 30.

[0085] The thickness e is considered excluding any thread for assembly to a hood, if applicable.

[0086] The internal diameter D of the neck 20 is further defined in the clamping portion 30.

[0087] If the inside diameter of the neck varies in the clamping portion 30, then the inside diameter D corresponds to the minimum inside diameter in the clamping portion 30.

[0088] The distribution nozzle 14 is arranged in the opening 22 delimited by the collar 20.

[0089] The dispensing nozzle 14 here has a through passage 36, to allow the cosmetic product to exit.

[0090] More specifically, the nozzle 14 closes the opening 22 except for the passage 36.

[0091] The tip 14 here includes a cooperation portion 38 adapted to be inserted into the opening 22 to allow the tip 14 to be retained in the neck 20 of the main body 12.

[0092] The tip 14, more particularly the cooperation portion 38, has a geometry adapted to cooperate with the opening 22.

[0093] The tip 14 has, for example, a rotational symmetry about an axis, coincident here with the principal axis X when the tip 14 is inserted into the main body 12.

[0094] The dispensing nozzle 14 is made of the same material as the main body 12, more specifically here in polyethylene terephthalate (PET).

[0095] The dispensing nozzle 14 has an outer surface 40, and here in addition an inner surface 42.

[0096] The interior surface 42 delimits the passage 36.

[0097] The outer surface 40 and the inner surface 42 are delimited by the same wall.

[0098] The outer surface 40 extends partially opposite the inner surface 26 of the neck 20. More specifically, in the cooperation potion 38, the outer surface 40 extends opposite the inner surface 26 of the neck 20.

[0099] The distribution nozzle 14 has a circumferential relief 44 on the outer surface 40.

[0100] The circumferential relief 44 is arranged and provided so that, when the tip 14 is inserted into the neck 20, the circumferential relief 44 cooperates with the clamping portion 30.

[0101] The outside diameter of the distribution nozzle 14, defined at the level of the outside surface 40, measured at the level of the circumferential relief is strictly greater than the inside diameter of the neck 20 at the level of the circumferential relief by a clamping distance, for example between 0.05 mm and 0.15 mm, and in particular by 0.1 mm.

[0102] The outer diameter of the dispensing nozzle 14, defined at the outer surface 40, measured at the circumferential relief, is strictly greater than the inner diameter of the neck 20 at the snap-fit ​​relief 32, where applicable, for example by a distance between 0.17 mm and 0.27 mm, in particular by 0.22 mm

[0103] The dispensing nozzle 14 is inserted into the neck 20, so that the conditioning device 10 has a clamping area 46 in which the nozzle 14 exerts a radial force on the neck 20, more particularly on the entire periphery of the neck 20.

[0104] The clamping area 46 here allows a seal between the tip 14 and the main body 12 when the tip 14 is inserted into the neck 20.

[0105] In the clamping area 46, the outer surface 40 of the distribution nozzle 14 cooperates with the inner surface 26 of the neck 20, so that the distribution nozzle 14 exerts a radial force against the neck 20.

[0106] The radial force here enables the seal between the distribution nozzle 14 and the main body 12.

[0107] The clamping zone 46 here includes, more particularly, the circumferential relief 44, and furthermore the clamping portion 30.

[0108] The distance d between the clamping zone 46 and the distal end 24 is greater than or equal to one quarter of the internal diameter D of the neck 20 in the clamping zone 46, corresponding to the internal diameter D of the neck in the clamping portion 30, more particularly greater than or equal to one third of the inner diameter D in the clamping zone 46.

[0109] The distance d is measured along an axial direction, corresponding here to the direction of the principal axis X between the distal end 24 of the neck 20 and an axial end of the clamping zone 46 located closest to the distal end 24. In other words, the distance d corresponds to the minimum axial distance, measured along the principal axis, separating the clamping zone 46 from the distal end 24 of the neck 20.

[0110] The circumferential relief 44 cooperates with the clamping portion 30 in the clamping zone 46, so that the circumferential relief 44 presses against said clamping portion 30, more particularly radially.

[0111] The tip 14 does not exert radial force on the neck 20 between the clamping zone 46 and the distal end 24 or on the distal end 24.

[0112] The tip 14 does not exert force on the neck 20 between the clamping zone 46 and the distal end 24, excluding the clamping zone and the distal end.

[0113] More particularly here, the distribution tip 14 and the neck 20 do not have radial contact between the clamping area 46 and the distal end 24, the clamping area excluded, or on the distal end 24.

[0114] More particularly here, the distribution tip 14 and the neck 20 have no contact between the clamping area 46 and the distal end 24, the clamping area and the distal end being excluded.

[0115] More specifically here, the distribution nozzle 14 bears purely axially on the distal end 24 of the neck 20 by means of a frontal bearing surface 15 provided, for example, on a support flange. Preferably, the frontal bearing surface 15 of the distribution nozzle 14 exerts a purely axial force on the distal end 24 of the neck 20 when the distribution nozzle 14 is fixed to the neck 20 of the main body 12, such that, in particular, the nozzle is under tension in its axial portion extending between the frontal bearing surface 15 and the circumferential relief 44.

[0116] The inner diameter of the neck 20 at the lower surface 26, at any point between the clamping zone and the distal end outside the clamping zone, is here strictly greater than the outer diameter of the outer surface 40 of the tip 14 opposite said point, when the tip 14 is inserted into the neck 20.

[0117] Here, the distance d between the clamping zone 46 and the distal end 24 is, for example, furthermore, greater than or equal to twice the thickness e of the neck in the clamping zone 46, corresponding to the thickness e of the neck in the clamping portion 30.

[0118] Here, the distance d between the clamping zone 46 and the distal end 24 is, for example, furthermore, greater than or equal to one third of the longitudinal distance, in the axial direction, between the shoulder 34 and the distal end 24.

[0119] The conditioning device further includes a hood 48.

[0120] The hood 48 is here suitable for being snapped directly onto the collar 20.

[0121] A method for assembling a conditioning device 10 according to the invention will now be described.

[0122] The assembly process comprises the following steps:

[0123] - supply of a main body 12 as described above,

[0124] - supply of a dispensing nozzle 14 as described above, and

[0125] - forced insertion of the dispensing nozzle 14 into the neck 20, for example by a translational movement along the principal X axis.

[0126] The insertion is carried out so that the distribution nozzle 14 is inserted into the opening and until the distribution nozzle 14 and the main body 12 cooperate in the clamping area 46, more particularly in a tight manner.

[0127] More specifically, the insertion is carried out until the circumferential relief 44 and the clamping portion 30 cooperate.

[0128] After insertion, the distribution tip 14 does not exert a radial force on the neck 20 between the clamping zone 46 (excluded) and the distal end 24. More particularly here, the distribution tip does not exert a radial force on the neck 20 outside the clamping zone 46.

[0129] In the example shown, when the dispensing nozzle 14 is inserted into the neck 20, the circumferential relief 44 extends beyond the snap-in relief 32, so that after insertion, the snap-in relief 32 extends between the circumferential relief 44 and the distal end 24.

[0130] The ratchet relief 32 here prevents disengagement of the tip 14 and the main body 12, in addition to the existing radial clamping between these two elements in the clamping zone 46.

[0131] The snap-fit ​​relief 32 extends here adjacent to the circumferential relief 44, so that the circumferential relief 44 is in axial abutment against the snap-fit ​​relief 32.

[0132] The passage of the ratchet relief 32 indicates here that the nozzle 14 is inserted until the outer surface 40 of the distribution nozzle 14 cooperates with the inner surface 26 of the neck 20 in the clamping area 46.

[0133] In an alternative not shown mode, the nozzle does not have a circumferential relief on its outer surface at the clamping area, the neck having a circumferential relief on its inner surface at the clamping area, so that the outer surface of the dispensing nozzle cooperates with the inner surface of the neck in the clamping area, and the dispensing nozzle exerts a radial force against the neck.

[0134] In an embodiment not shown, the snap-on is achieved differently, for example using at least one deformable tab.

[0135] Alternatively, the conditioning device does not have a snap-on system.

[0136] A second example of a conditioning device is shown in [Fig.3].

[0137] Only the points by which this second example differs from the first example will now be described.

[0138] The conditioning device 110 here includes, similarly to the first example, a main body 112, a nozzle 114, and furthermore here a cover 148.

[0139] The hood 148 is here suitable to be screwed onto the collar 120 of the main body 112, and not snapped on.

[0140] The collar 120 has, for example, on its outer wall a thread 150, complementary to a tapping of the hood 148.

[0141] In the cosmetic product packaging device according to the invention, the clamping area is at a distance from the free edge, so that the forces applied to the neck near the free edge are limited.

[0142] Thus, this limits the risk of flare of the free edge, or even of crack(s), including for a packaging device made of a single material, more particularly PET.

Claims

Demands

1. A cosmetic product packaging device (10; 110) comprising a main body (12; 112) and a dispensing nozzle (14; 114), the main body (12; 112) having a neck (20; 120) defining an opening (22) in which the dispensing nozzle (14; 114) is arranged, the main body (12; 112) having a distal end (24), the distal end (24) forming a free edge of the neck (20; 120), the dispensing nozzle (14; 114) being inserted into the neck (20; 120), such that the packaging device (10; 110) has a clamping zone (46) in which the dispensing nozzle (14; 114) exerts a radial force on the neck (20; 120), wherein the distance (d) between the zone of tightening (46) and the distal end (24) is greater than or equal to one quarter of the internal diameter (D) of the neck (20; 120) in the tightening zone (46), preferably greater than or equal to one third of the internal diameter (D) of the neck (20;120) in the clamping zone (46), the distribution nozzle (14; 114) exerting no radial force on the neck (20; 120) either between the clamping zone (46) and the distal end (24), or on the distal end (24).;

2. Packaging device according to claim 1, wherein the main body (12; 112) and the dispensing nozzle (14; 114) are made of the same material, more particularly of polyethylene terephthalate (PET).

3. Packaging device according to claim 1 or 2, wherein the neck (20; 120) has a thickness (e) in the clamping zone (46), the distance (d) between the clamping zone (46) and the distal end (24) being greater than or equal to twice the thickness (e) of the neck (20; 120) in the clamping zone (46).

4. Packaging device according to any one of claims 1 to 3, wherein the dispensing nozzle (14; 114) and the neck (20; 120) do not have radial contact between the clamping area (46) and the distal end (24) and at the distal end (24).

5. Packaging device according to any one of claims 1 to 4, wherein the dispensing nozzle (14; 114) has a circumferential relief (44) on an outer surface (40) at the clamping area (46) and / or the neck (20; 120) has a circumferential relief on an inner surface (26) at the clamping area (46).

6. Packaging device according to any one of claims 1 to 4, wherein the dispensing nozzle (14; 114) has a circumferential relief (44) on an outer surface (40), the circumferential relief (44) cooperating with a clamping portion (30) of an inner surface (26) of the neck (20; 120) in the clamping zone (46), so that the circumferential relief (44) presses against said clamping portion (30) of the inner surface (26).

7. Packaging device according to claim 6, wherein the inner surface (26) of the neck (20; 120) has a snap-on relief (32) between the distal end (24) and the clamping portion (30), the inner diameter of the neck (20; 120) at the snap-on relief (32) being strictly less than the outer diameter of the dispensing nozzle (14; 114) at the circumferential relief (44).

8. Packaging device according to any one of claims 1 to 7, wherein the main body (12; 112) has a shoulder (34), the neck (20; 120) extending between the shoulder (34) and the distal end (24), the distance (d) between the clamping zone (46) and the distal end (24) is greater than or equal to one third of the longitudinal distance between the shoulder (34) and the distal end (24).

9. A method for assembling a packaging device (10; 110) according to any one of claims 1 to 8, comprising the following steps: - providing a main body (12; 112), the main body (12; 112) having a neck (20; 120) defining an opening (22), the main body (12; 112) having a distal end (24), the distal end (24) forming a free edge of the neck (20; 120), - providing a dispensing nozzle (14; 114), and - forcibly inserting the dispensing nozzle (14; 114) into the neck (20; 120), so that the dispensing nozzle (14; 114) is arranged in the opening (22) and until the dispensing nozzle (14; 114) and the main body (12 ; 112) cooperate in a clamping zone (46) in which the distribution nozzle (14; 114) exerts a radial force on the neck (20;120), wherein the distance (d) between the clamping zone (46) and the distal end (24) is greater than or equal to one quarter of the inside diameter (D) of the neck (20; 120) in the clamping zone (46), preferably greater than or equal to one third of the inside diameter (D) of the neck (20; 120) in the clamping zone, the dispensing tip (14; 114) exerting no radial force on the neck (20; 120) either between the clamping zone (46) and the distal end (24), or on the distal end (24).

10. Assembly method according to claim 9, of a packaging device (10; 110) according to claim 5, wherein, when the dispensing nozzle (14; 114) is inserted into the neck (20; 120), the circumferential relief (44) extends beyond the snap-in relief (32), so that after insertion, the snap-in relief (32) extends between the circumferential relief (44) and the distal end (24).

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