Fluid product distribution assembly

Abstract

Fluid product distribution assembly comprising a reservoir (10) and a piston (20) sliding in said reservoir (10), a sampling needle (30) being fixed on said reservoir (10) for drawing a fluid product into said reservoir (10), a removable spray head (40) being assembled on said reservoir (10), around said sampling needle (30), for spraying said fluid product, said spray head (40) comprising an insert (50) disposed upstream of a distribution orifice (41), said spray head (40), when assembled on said reservoir (10), being axially movable between transport and operating positions, said assembly comprising guiding means (111; 39) for guiding said spray head (40) during its assembly in its transport position and / or during its movement into its operating position, first locking means (112;46, 119) to maintain said spray head (40) in its transport position, and second locking means (113; 48, 119) to maintain said spray head (40) in its operating position. "Figure for abbreviation: Figure 1";

Description

Title of the invention: Fluid product distribution assembly

[0001] The present invention relates to a fluid product distribution assembly.

[0002] Fluid product dispensing devices are well known. They generally comprise a reservoir, dispensing means, and a dispensing head. The dispensing head may be a spray head, for example, of the nasal type. These spray heads generally have two parts: a body forming the head and a part forming the nozzle, that is, the part that creates the spray by swirling the fluid product as it is dispensed. In the case of an external nozzle, a small sleeve is inserted externally into the downstream end of the body to define the spray pattern. In the case of an internal nozzle, an insert inserted from the inside of the head cooperates with the end wall of the body to define the spray pattern.In both cases, the spray profiles generally include a plurality of non-radial channels, typically three, formed either in the bottom wall of the head, on the outer nozzle sleeve, or on the inner nozzle insert. Generally, the spray heads are mounted on pump piston rods or valve stems to guide the product, dispensed from the pump or valve, to the spray orifice. However, it has also been proposed to mount a spray head directly on the outlet of a syringe-type reservoir to spray the contents of said syringe rather than injecting it through a needle. Document WO 00 / 71263 describes such an arrangement. Again, these spray heads are always made with two or more parts assembled together. This implementation, in particular, prevents the use of these syringes in aspiration mode.In particular, a syringe with a spray nozzle does not allow for the typical aspiration mode of syringes, for example, to draw a fluid product from a collection reservoir. Furthermore, a syringe with a needle does not allow for atomization of the fluid product during dispensing.

[0003] Document WO 2015 / 104511 describes a fluid product dispensing assembly comprising a single-piece reservoir and sampling needle, intended for reconstituting a fluid product by first mixing a powder with a solvent, then spraying said mixture as a nasal spray, in one or two doses, through a spray head assembled around the sampling needle. This assembly has drawbacks. Specifically, the tip of the sampling needle is either unprotected when the spray head is not assembled, or it is under stress within the assembled spray head. In both cases, there is a risk of damage during transport of the assembly, prior to use, in particular in case the assembly falls. Furthermore, the one-piece construction of the reservoir with the needle can be complicated, and requires using the same material, which is not always desirable.

[0004] The present invention aims to provide a fluid product distribution assembly that does not reproduce the aforementioned disadvantages.

[0005] The present invention aims in particular to provide a fluid product distribution assembly which guarantees the integrity of the needle tip before use, particularly during transport and storage.

[0006] The present invention also aims to provide such a fluid product distribution assembly which allows for optimization of materials, in particular for making the reservoir and the sampling needle.

[0007] The present invention also aims to provide a fluid product distribution system that is simple and inexpensive to manufacture and assemble, and that can operate in both suction and expulsion modes.

[0008] The present invention also aims to provide such a fluid product distribution assembly which enables correct and reproducible spraying.

[0009] The present invention thus relates to a fluid product distribution assembly comprising a reservoir for containing a fluid product and a piston sliding in said reservoir, a sampling needle being fixed on said reservoir for drawing a fluid product to be distributed into said reservoir, a removable spray head being assembled on said reservoir, around said sampling needle, for spraying said fluid product to be distributed out of said reservoir, said spray head comprising a distribution orifice and an insert disposed upstream of said distribution orifice, said spray head, when assembled on said reservoir, is axially movable between a transport position and a position of use,said assembly comprising guiding means for guiding said spray head during its assembly into its transport position and / or during its movement into its operating position, first locking means for maintaining said spray head in its transport position, and second locking means for maintaining said spray head in its operating position.

[0010] Advantageously, said sampling needle comprises a cannula portion having an outlet orifice and comprising a first portion of larger diameter and a second portion of smaller diameter, forming the tip which includes said outlet orifice, said insert comprising a receiving sleeve receiving said tip when said spray head is assembled on said reservoir.

[0011] Advantageously, in said transport position, said tip formed by said second part of smaller diameter is disposed inside said sleeve of reception with a space between the external surface of said tip and the internal surface of said receiving sleeve.

[0012] Advantageously, in said operating position, said first part of larger diameter is in tight contact, in particular sealed, with said receiving sleeve.

[0013] Advantageously, in said operating position, said second part of smaller diameter is in tight contact with said receiving sleeve.

[0014] According to an advantageous embodiment, said spray head comprises at least one internal profile extending radially inwards and said tank comprises second and third external profiles extending radially outwards, offset axially on an external surface of said tank, said at least one internal profile cooperating with said second external profiles to form said first locking means defining said transport position and with said third external profiles to form said second locking means defining said use position.

[0015] Advantageously, said spray head comprises a plurality of internal profiles, preferably three, distributed around its periphery, and said second and third external profiles of said reservoir are respectively formed by a peripheral rib.

[0016] Advantageously, said tank comprises first external profiles extending radially outwards, offset axially upwards with respect to said second external profiles, and cooperating with said spray head to form said guiding means.

[0017] Alternatively, said sampling needle has a radially external wall cooperating with said spray head to form said guiding means.

[0018] According to another advantageous embodiment, said reservoir comprises a radially projecting lug, said spray head comprising a first and a second cutout, diametrically opposed, extending axially upwards from an axially lower edge, said second cutout being larger than said first cutout, so that said first blocking means are formed by said lug cooperating with said first cutout and said second blocking means are formed by said lug cooperating with said second cutout.

[0019] Advantageously, each cutout ends with a respective clipping area into which said lug snaps.

[0020] Advantageously, said reservoir and / or said piston includes dose splitting means to separate the fluid product to be distributed contained in said reservoir into at least two doses intended to be sprayed during several successive actions of said assembly.

[0021] Advantageously, said dose splitting means comprise a lug of said piston sliding in a groove of said reservoir, said groove comprising a shoulder to lock said lug after spraying of the first dose of fluid product.

[0022] Advantageously, said reservoir and / or said piston includes energy accumulation means requiring the application of at least one predetermined force to enable the spraying of said fluid product to be distributed.

[0023] Advantageously, said energy accumulation means comprise at least one constriction or boss cooperating with said lug of said piston, said lug being able to pass beyond said energy accumulation means when at least said predetermined force is applied to said piston.

[0024] Advantageously, before actuation, said lug is axially offset from said energy accumulation means, so that at the beginning of an actuation stroke, said piston performs a purge of air and / or dead volume.

[0025] These and other advantages and features of the present invention will become more apparent from the following detailed description, made with reference to the accompanying drawings, given by way of non-limiting examples, and in which:

[0026] [Fig-1] Fig. 1 is a schematic cross-sectional view of a set of distribution according to a first advantageous embodiment, with the spray head assembled in the transport position,

[0027] [Fig.2] Fig.2 is a view similar to that of Fig.1, in the position of use,

[0028] [Fig.3] [Fig.3] is a detailed cross-sectional view of the spray head implementation according to the first embodiment,

[0029] [Fig.4] Fig.4 is a horizontal sectional view of the spray head according to the AA cutting line on the [Fig.3]

[0030] [Fig.5] Fig.5 is a schematic perspective view of the insert,

[0031] [Fig.6] Fig.6 is a schematic perspective view of the needle of pre lifting according to the first embodiment,

[0032] [Fig.7] Fig.7 is a schematic perspective view of the reservoir according to the first embodiment,

[0033] [Fig.8] Fig.8 is a schematic perspective view of the piston,

[0034] [Fig.9] Fig.9 is a schematic view of the assembly in the transport position,

[0035] [Fig. 10] Fig. 10 illustrates the assembly without the spray head, for the sampling phase,

[0036] [Fig. 11] Figures 11 to 13 show the assembly respectively before distribution of the first dose, after distribution of the first dose, before distribution of the second dose, and after distribution of the second dose.

[0037] [Fig. 12] cf. [Fig. 11]

[0038] [Fig. 13] cf. [Fig. 11]

[0039] [Fig. 14] Fig. 14 is a schematic perspective view of the needle of pre lifting according to a second embodiment,

[0040] [Fig. 15] The [Fig. 15] is a schematic cross-sectional view of an assembly distribution according to the second embodiment, with the spray head assembled in the transport position,

[0041] [Fig. 16] Fig. 16 is a schematic perspective view of the reservoir according to a third embodiment, and

[0042] [Fig. 17] Fig. 17 is a schematic perspective view of the spray head implementation according to the third embodiment.

[0043] The dispensing assembly comprises a syringe-type reservoir 10 and a piston 20 sliding within said reservoir between a retracted position, visible in [Fig. 11], and a depressed position, which is shown in Figures 1, 2, 9, 10, 13, and 15. A sampling needle 30 is fixed to the reservoir 10, and a spray head 40 provided with a dispensing orifice 41 is removably assembled onto said sampling needle 30. The spray head 40 contains a hollow insert 50 disposed upstream of the dispensing orifice 41.

[0044] The piston 20 comprises a piston element 22 integral with an actuating rod 21, which is operated by the user during dispensing, in particular by manually pressing on an end flange 23 of the piston rod 21. The piston element 22 may be formed as a single piece with the piston rod 21, for example by molding a plastic material, or form a separate element attached, for example overmolded, to said piston rod. In this case, the piston element 22 may be made of a different material than the piston rod 21.

[0045] The reservoir 10 has an upper part 11 intended to receive the fluid product to be distributed and a lower part 12 intended to cooperate with the actuating rod 21 of the piston 20. A radial flange 13 forming a finger rest is advantageously provided between said first and second parts 11, 12 of the reservoir 10.

[0046] The upper part 11 of the reservoir 10 has an end portion 110 onto which the sampling needle 30 is attached, for example by screwing or snapping. This end portion 110 may have a reduced external diameter, as illustrated in Figures 1, 2 and 7.

[0047] The lower portion 12 of the reservoir 10 has at least one groove 15, each of which cooperates with a lug 25 of said piston rod 21. This lug 25 projects radially outwards and slides in said at least one groove 15 during actuation of said distribution assembly. Advantageously, two diametrically opposed grooves 15 may be provided, as well as two diametrically opposed lugs 25.

[0048] The groove 15 may include a shoulder 17 forming a dose-fractionation means. In this case, the groove 15 extends axially into a laterally offset upper portion of the groove 16. Thus, when the piston 20 is actuated to spray the fluid product to be dispensed, the lug 25 of the piston 20 slides axially in a first portion of the groove 15, and this lug 25 is stopped by the shoulder 17 of the groove 15. This defines the first dose by interrupting the actuation stroke of the piston 20 in the reservoir 10. The user must then, for example, slightly rotate the piston 20 to bring the lug 25 opposite the second portion of the groove 16 in order to spray the second dose. Of course, the invention also applies to a single-dose device, in which the entire fluid product to be dispensed is sprayed in a single dose.It can also be applied to devices containing more than two doses, for example three or four doses.

[0049] Advantageously, the groove 15 includes energy storage means, such as, for example, constrictions 18, 19, which can cooperate with the lug 25 at the beginning of each actuation stroke to require the user to exert at least sufficient force on the piston 20 to overcome the resistance generated by said energy storage means. When this force is reached, the lug 25 passes beyond said energy storage means, abruptly releasing the stored energy into the user's hand, thus ensuring that the actuation stroke, or half the actuation stroke in the illustrated example of a bidose, is completed in full. Of course, these energy storage means can be implemented in any suitable manner, and the constrictions 18, 19 are only one example of an advantageous embodiment. For example, bosses or breakable bridges can be considered in said groove 15, 16.

[0050] Other variants for the dose fractionation means are conceivable, for example, an elastically deformable portion formed either on the piston or on the reservoir, which deforms when a sufficient force is applied to the piston. In this case, the dose fractionation means could simultaneously form energy storage means. Other variants are also conceivable.

[0051] In the example shown, the sampling needle 30 comprises a cannula portion 35 having an outlet 32. A fastening portion 31 is provided for attaching the sampling needle 30 to the reservoir 10, in particular its tip portion 110, for example by screwing, snapping, or any other suitable fastening means. The cannula portion 35 comprises a first portion 33 of larger diameter connected to the fastening portion 31 and a second portion 34 of smaller diameter, forming the tip which includes the outlet 32.

[0052] The spray head 40 comprises a hollow body 42 having a bottom wall having a spray orifice 4L

[0053] The spray head 40 contains an insert 50 upstream of the spray orifice 42 to fit onto the sampling needle 30. This insert is advantageously inserted into an upper sleeve 44 of the spray head 40. The insert 50 advantageously has one or more lateral passages 55 that allow the fluid product to pass from the inside of said insert 50 to the outside. The upper axial end wall 51 of said insert 50 is then closed, and the external surface of said axial end wall 51 of said insert can form, with the bottom wall of the spray head 40, a spray profile, comprising, for example, swirl channels 52 and a spray chamber 53. This spray profile makes it possible to create good atomization during the distribution of the fluid product through said spray head 40.The spray profile can be formed on the external surface of said end wall 51 of said insert. Alternatively, the spray profile can be provided in the bottom wall of said spray head 40, in which case the external surface of the axial end wall 51 of the insert could be smooth. Preferably, said spray head 40 and said insert 50 are each made by molding from a plastic material. Advantageously, the unit formed by the spray head 40 and the insert 50 is made as described in document WO2021094683A1.

[0054] On the opposite side to the upper axial end wall 51, the insert 50 has a receiving sleeve 59 intended to receive the tip of the sampling needle 30 when the dispensing head is assembled on the reservoir.

[0055] As can be seen in [Fig. 1], in the transport position, the needle tip formed by the second part 34 of the smaller diameter of the cannula part 35 is arranged inside the receiving sleeve 59 of the insert 50, but with a space between the external surface of the tip 34 and the internal surface of the receiving sleeve 59. Thus, in this position, no radial stress is exerted by the insert 50 on the tip 34, but the latter is still protected by the receiving sleeve 59. Thus, in the event of an accidental drop of the assembly, for example during transport, there is no risk of damaging the tip 34, even if the spray head 40 is subjected to stresses relative to the reservoir 10 due to the impact of the drop.

[0056] When the spray head 40 is moved to its operating position, as shown in [Fig.2], the cannula portion 35 penetrates further into the receiving sleeve 59, until the first part 33 of the needle comes into tight and advantageously sealing contact with said receiving sleeve 59. Advantageously, the diameter of the receiving sleeve 59 decreases towards the dispensing orifice 41, and it is therefore possible that, in the operating position, the tip formed by the second part 34 of the cannula portion 35 also comes into tight contact with the inner wall of the receiving sleeve 59.

[0057] According to the invention, the assembly includes guiding means for guiding said spray head 40 during its assembly in its transport position and / or during its movement in its use position, first locking means for maintaining said spray head 40 in its transport position, and second locking means for maintaining said spray head 40 in its use position.

[0058] Figures 1 to 13 illustrate a first advantageous embodiment.

[0059] In this first embodiment, the upper part 11 of the tank 10 comprises first, second, and third external profiles 111, 112, 113 extending radially outwards, offset axially on the external surface of said upper part 11, and intended to cooperate with the spray head 40, as will be described in more detail below. Each series of external profiles 111, 112, 113 may comprise a single profile extending around the periphery, for example in the form of a rib. Alternatively, a plurality of projections distributed around the periphery could be envisaged for each series of external profiles.

[0060] The lower axial edge 43 of the spray head 40 has at least one internal profile 45, which extends radially inwards. Advantageously, there are a plurality of internal profiles 45, distributed around the circumference of the lower axial edge 43, for example three or four. Alternatively, a single internal profile extending around the entire circumference is possible.

[0061] This at least one internal profile 45 cooperates during the assembly of the spray head 40 on the tank 10 with the first, second and / or third external profiles 111, 112, 113.

[0062] Thus, when the spray head 40 is assembled onto the tank 10, at least one internal profile 45 first passes over the first external profiles 111, which will act primarily for guiding and axially aligning the spray head with respect to the tank. In this first embodiment, the guiding means are therefore formed by the first external profiles 111.

[0063] For transport and storage, at least one internal profile 45 passes over the second external profiles 112, but not over the third external profiles 113, as shown in [Fig. 1]. In this first embodiment, the first locking means are therefore formed by the second external profiles 112.

[0064] It is only when the device is to be used to spray the contents of the tank that at least one internal profile 45 passes over the third external profiles 113 to snap into place. In this first embodiment, the second locking means are therefore formed by the third external profiles 113.

[0065] In the example shown in Figures 1 to 13, there are three internal profiles 45 distributed around the periphery of the spray head 40, as seen in [Fig.4]. In this case, the first, second and third external profiles 111, 112, 113 of the reservoir are respectively formed by a peripheral rib, as seen in [Fig. 10],

[0066] Advantageously, each part forming the distribution assembly can be made of a specific material adapted to optimize its properties.

[0067] Thus, for example, the spray head 40 can be made of a rigid material but nevertheless exhibiting slight flexibility, such as polypropylene, to allow it to snap onto the external profiles 111, 112, 113 of the tank 10.

[0068] Similarly, the insert 50 can be made of a rigid material but nevertheless exhibiting slight flexibility, such as polypropylene, to enable it to achieve a seal on the one hand with the spray head 40 and on the other hand with the sampling needle 30.

[0069] The reservoir 10 can be made of a rigid material and sufficiently translucent to allow the fluid product in the reservoir to be seen, but nevertheless having a slight flexibility, such as polypropylene, to allow snapping into the spray head 40 with limited effort in the operating position.

[0070] Advantageously, the spray head 40, the insert 50 and the reservoir 10 are made of the same material, preferably polypropylene.

[0071] The sampling needle 30 is advantageously made of a material that is sufficiently fluid during molding, but rigid and non-brittle after cooling to allow efficient piercing, for example, of COC, COP, PTCA, PBT or PC.

[0072] The piston 20 can be made of a rigid material with a smooth, sliding surface, but which nevertheless exhibits slight flexibility, such as high-density polyethylene, to ensure a seal with the reservoir 10 without generating excessive force. The rigidity / flexibility compromise is also important for assembling the piston 20 in the reservoir 10 and for efficient energy accumulation with each actuation.

[0073] Figures 9 to 13 partially illustrate the phases of use of a distribution set according to the first embodiment as described above.

[0074] As seen in [Fig.9], before use, the spray head 40 is pre-assembled in a removable manner in its storage and transport position on said sampling head 30, in which the needle tip is not subjected to stress while being protected in the receiving sleeve 59 of the insert 50.

[0075] The user can then remove the spray head 40, as illustrated in [Fig. 10], to perform the sampling phase, and then return it to its operating position to perform the spray(s). Sampling is carried out in the conventional manner by sliding the piston 20 in the reservoir 10 away from the needle 35, thus drawing the fluid from the sampling reservoir into said reservoir 10. Optionally, several different fluids can be drawn from several different sampling reservoirs, to mix in reservoir 10, before spraying.

[0076] The spray head 40 is then reassembled around said sampling needle 30, in the position of use, as seen in [Fig.11].

[0077] The fluid product to be distributed can then be sprayed through said spray head 40.

[0078] Advantageously, before the first and / or second dose is delivered, a purge, for example of air and dead volume, can be carried out before distribution. Thus, as can be seen in [Fig. 1 1], at rest, the lug 25 of the piston rod is axially offset from the constriction 18. At the beginning of the actuation stroke, until the lug 25 of the piston rod comes into contact with the constriction 18 allowing energy accumulation, the axial displacement of the piston makes this purge possible.

[0079] Figure 12 shows the assembly after distribution of the first dose and Figure 13 shows the whole thing after distribution of the second dose.

[0080] Figures 14 and 15 illustrate a second embodiment, which differs from the first embodiment described above only in the guiding means.

[0081] In this second embodiment, there are no longer the first external profiles 111 on the reservoir, and it is the sampling needle 30 which has a radially external wall 39 which cooperates with the inside of the spray head 40 to achieve its guidance during its axial movement.

[0082] Figures 16 and 17 illustrate a third embodiment.

[0083] In this third embodiment, the guiding means are, as in the second embodiment, formed by the wall 39 of the sampling needle 30.

[0084] The difference here concerns the first and second means of blocking.

[0085] Thus, the reservoir 10 has in its upper part 11 a radially projecting lug 119.

[0086] The spray head 40 has two diametrically opposed cutouts 46, 48 extending axially upwards from the lower axial edge 43. The second cutout 48 is larger than the first cutout 46. Advantageously, each cutout 46, 48 terminates with a clipping area 47, 49 into which the lug 119 of the reservoir can snap into place.

[0087] Thus, in transport position, the lug 119 clips into the clipping area 47 of the first cutout 46.

[0088] When the user wishes to use the assembly, particularly during the sampling phase, he will remove the spray head 40 from its transport position.

[0089] Next, before using the assembly to distribute the dose(s) of product fluid contained in the reservoir 10 after the sampling phase, the spray head 40 will be put in place, but this time with the lug 119 of the reservoir which enters the second cutout 48 to clip into the position of use in the clipping area 49.

[0090] Other embodiment variants for the guiding means, the first locking means and the second locking means are conceivable.

[0091] Although the present invention has been described with reference to several advantageous embodiments thereof, it is understood that a person skilled in the art may make any useful modifications to it, without departing from the scope of the present invention as defined by the attached claims.

Claims

Demands

1. Fluid product distribution assembly comprising a reservoir (10) for containing a fluid product and a piston (20) sliding in said reservoir (10), a sampling needle (30) being fixed on said reservoir (10) for drawing a fluid product to be distributed into said reservoir (10), a removable spray head (40) being assembled on said reservoir (10), around said sampling needle (30), for spraying said fluid product to be distributed out of said reservoir (10), said spray head (40) comprising a distribution orifice (41) and an insert (50) disposed upstream of said distribution orifice (41), characterized in that said spray head (40), when assembled on said reservoir (10), is axially movable between a transport position and a use position, said assembly comprising guiding means (111;39) to guide said spray head (40) during its assembly in its transport position and / or during its movement into its operating position, of the first locking means (112; 46, 119) to hold said spray head (40) in its transport position, and of the second locking means (113; 48, 119) to hold said spray head (40) in its operating position.;

2. Assembly according to claim 1, wherein said sampling needle (30) comprises a cannula portion (35) provided with an outlet orifice (32) and comprising a first portion (33) of larger diameter and a second portion (34) of smaller diameter, forming the tip which comprises said outlet orifice (32), said insert (50) comprising a receiving sleeve (59) receiving said tip when said spray head (40) is assembled on said reservoir (10).

3. Assembly according to claim 2, wherein, in said transport position, said tip formed by said second part (34) of smaller diameter is disposed inside said receiving sleeve (59) with a space between the external surface of said tip and the internal surface of said receiving sleeve.

4. Assembly according to claim 2 or 3, wherein, in said position of use, said first part (33) of larger diameter is in tight contact, in particular sealing, with said receiving sleeve (59).

5. Assembly according to any one of claims 2 to 4, wherein, in said position of use, said second part (34) of smaller diameter is in tight contact with said receiving sleeve (59).

6. Assembly according to any one of the preceding claims, wherein said spray head (40) comprises at least one internal profile (45) extending radially inwards and said tank (10) comprises second and third external profiles (112, 113) extending radially outwards, offset axially on an external surface of said tank (10), said at least one internal profile (45) cooperating with said second external profiles (112) to form said first locking means defining said transport position and with said third external profiles (113) to form said second locking means defining said use position.

7. Assembly according to claim 6, wherein said spray head (40) comprises a plurality of internal profiles (45), preferably three, distributed around its periphery, and said second and third external profiles (112, 113) of said reservoir (10) are respectively formed by a peripheral rib.

8. Assembly according to claim 6 or 7, wherein said tank (10) comprises first external profiles (111) extending radially outwards, axially offset upwards relative to said second external profiles (112), and cooperating with said spray head (40) to form said guiding means.

9. Assembly according to claim 6 or 7, wherein said sampling needle (30) has a radially external wall (39) cooperating with said spray head (40) to form said guiding means.

10. Assembly according to any one of claims 1 to 5, wherein said reservoir (10) has a radially projecting lug (119), said spray head (40) having a first and a second cutout (46, 48), diametrically opposed, extending axially upwards from an axially lower edge (43), said second cutout (48) being larger than said first cutout (46), such that said first locking means are formed by said lug (119) cooperating with said first cutout (46) and said second locking means are formed by said lug (119) cooperating with said second cutout (48).

11. Assembly according to claim 10, wherein each cutout (46, 48) terminates with a respective clipping zone (47, 49) in which said lug (119) comes to snap into place.

12. Assembly according to any one of the preceding claims, wherein said reservoir (10) and / or said piston (20) comprise dose splitting means (15, 17; 25) for separating the fluid product to be distributed contained in said reservoir (10) into at least two doses intended to be sprayed during several successive actuations of said assembly.

13. Assembly according to claim 12, wherein said dose fractionation means comprise a lug (25) of said piston (20) sliding in a groove (15) of said reservoir (10), said groove comprising a shoulder (17) for locking said lug (25) after spraying of the first dose of fluid product.

14. Assembly according to any one of the preceding claims, wherein said reservoir (10) and / or said piston (20) comprise energy storage means (18, 19) requiring the application of at least one predetermined force to permit the spraying of said fluid product to be dispensed.

15. Assembly according to claims 13 and 14, wherein said energy storage means (18, 19) comprise at least one constriction or boss cooperating with said lug (25) of said piston, said lug (25) being able to pass beyond said energy storage means when at least said predetermined force is applied to said piston (20).

16. An assembly according to claim 15, wherein, prior to actuation, said lug (25) is axially offset from said energy storage means (18, 19), such that at the beginning of an actuation stroke, said piston (20) performs a purge of air and / or dead volume.

Images