EP3628026A1

EP3628026A1 - Fluid product dispensing module

Info

Publication number: EP3628026A1
Application number: EP18734859.4A
Authority: EP
Inventors: stéphane Beranger
Original assignee: Aptar France SAS
Current assignee: Aptar France SAS
Priority date: 2017-05-05
Filing date: 2018-05-04
Publication date: 2020-04-01
Anticipated expiration: 2038-05-04
Also published as: ES2883631T3; CN110709171B; BR112019022892B1; FR3065890B1; WO2018203018A1; CN110709171A; EP3628026B1; FR3065890A1; BR112019022892A2

Abstract

A fluid product dispensing module (M) intended to be incorporated into a fluid product dispensing head mounted on a fluid product reservoir, the fluid product dispensing module (M) comprising a fluid product inlet (13), a dispensing orifice (50) and a fluid product flow path (Cp) between the fluid product inlet (13) and the dispensing orifice (50), the dispensing module (M) further comprising a valve (3, 20) that selectively shuts off said fluid product flow path (Cp), said valve (3, 20) opening under a determined pressure of the fluid product in the fluid product flow path (Cp) upstream from the valve (3, 20), characterised in that it further comprises a vent path (Ca) for venting the fluid product reservoir.

Description

Fluid dispensing module

The present invention relates to a fluid dispenser module for integration in a fluid dispenser head mounted on a fluid reservoir. The fluid dispenser module includes a fluid product inlet, a dispensing port, and a fluid product flow path that extends between the fluid inlet and the dispensing port. The dispensing module also comprises a valve that selectively cuts off said fluid product flow path: this valve opens at a predetermined pressure of the fluid product into the flow path of fluid product upstream of the valve. The preferred fields of application of the present invention are those of perfumery, cosmetics or even pharmacy.

In the prior art, document EP01 17898 is known, for example, which describes a sprayer incorporating a fluid product dispensing module comprising a fluid product inlet, a valve sensitive to the pressure of the fluid product and a nozzle capable of dispensing the product. fluid in spray form. The fluid under pressure at the inlet of the dispensing module moves a movable member of the valve so that the fluid can flow into the module to the nozzle where it is sprayed.

The document US4273290 describes another fluid product dispensing module integrated in a dispensing head. More specifically, this dispensing module is in the form of a nozzle comprising a chamber and swirling channels, and a valve in the form of a disk biased by a spring. The pressurized fluid pushes the disc against the spring, so that the fluid can flow into the nozzle to reach the channels and the swirl chamber before spraying out through a dispensing orifice. .

WO94 / 27732 is also known which describes a fluid product dispensing module in the form of a nozzle in which is placed a core of flexible material that acts as a valve. The pressurized fluid product deforms the flexible core so that the fluid can flow to the dispensing orifice.

Thus, in these documents of the prior art, the fluid dispenser module defines a fluid product flow path that extends from an inlet of the dispensing module to a dispensing orifice. The valve is disposed on this fluid dispensing path so as to be able to cut or open it selectively under the action of the fluid under pressure.

The present invention aims to provide additional functionality to this type of fluid dispensing module. To do this, the present invention proposes that the fluid product dispensing module further comprises a venting path of the fluid reservoir, so that outside air can enter the reservoir through the dispensing module of the fluid reservoir. fluid product as fluid is removed from the reservoir and passes through the fluid dispenser module. In other words, the fluid dispenser module of the present invention makes it possible to manage the cross flow of the fluid product and the outside air to ensure that the reservoir is always maintained at atmospheric pressure.

Advantageously, the valve selectively cuts said venting path. Thus, the fl uid valve also serves as an air valve or vent by selectively opening and closing the venting path.

According to a practical and advantageous embodiment, the valve comprises a movable member which simultaneously closes a first lateral opening of the fluid product flow path and a second lateral opening of the venting path in a rest position, under the solicitation of a spring, and which releases these two lateral openings in an open position under the pressure of the fluid product upstream of the movable member against the spring. Thus, the displacement of the movable member makes it possible to mask and unmask the first lateral opening and the second side opening to simultaneously cut or open the fluid flow path and the vent path.

Advantageously, the movable member comprises two piston lips which slide in a sealed manner in a sliding shaft which forms the two lateral openings, the two piston lips closing the two lateral openings in the rest position. Preferably, the movable member comes into sealing abutment in the rest position under the action of the spring against a radial shoulder of the fluid flow path. This guarantees a double seal at the flow path of the fluid product.

According to an advantageous embodiment, the fluid product dispensing module comprises:

a mounting body intended to be fixedly received in a mounting housing of the dispensing head,

an insert piece fixedly received in the mounting body, the insert piece forming a sliding shaft,

a movable member slidably mounted in the sliding barrel,

- A spring which acts between the insert member and the movable member for biasing the movable member in the rest position.

The insert part with the spring and the movable member can be inserted axially into the mounting body so as to constitute the fluid dispenser module, which is then fixedly received in a mounting housing of the dispensing head.

Advantageously, the sliding shaft forms a first lateral opening of the fluid product flow path which is masked in the rest position by the movable member and disengaged by the movable member, advantageously only after a precompression sealing stroke. Preferably, the first lateral opening is connected downstream to a first groove formed by the insert member, this first groove communicating downstream with the dispensing orifice, which is advantageously formed by a nozzle mounted on the insert part. . Thus, the module of Fluid dispensing can be used as an outlet valve for a pump or valve. It can even serve as a pre-compression valve, which opens only from a determined threshold of fluid pressure.

On the other hand, the sliding shaft may form a second lateral opening of the venting path which is masked in the rest position by the movable member. Advantageously, the sliding shaft forms a third lateral opening of the venting path which communicates with the second lateral opening, when it is disengaged by the movable member, this third lateral opening being connected to a second groove formed by the second part. insert, this second groove opening on the outside of the fluid dispenser module.

The present invention also defines a fluid dispensing head comprising a mounting housing in which a fluid dispensing module as defined above is fixedly received.

The present invention further defines a fluid dispenser comprising a fluid reservoir and a fluid dispenser head incorporating a fluid dispensing module as defined above, the fluid dispensing head being mounted on the fluid dispenser fluid reservoir.

According to one embodiment, the dispenser may comprise:

a flush of air, such as a flexible pear, capable of undergoing phases of crushing and elastic expansion, the air flush being connected to the fluid product inlet of the fluid dispenser module to supply a flow of air under pressure through the flow path of fluid product to the dispensing orifice during the phases of elastic collapse, and

a fluid product duct also connected to the fluid product inlet of the fluid product distribution module, the fluid product in the duct being sucked by the Venturi air pressure flow, so as to dispense a mixture air and fluid through the dispensing orifice.

Alternatively, the fluid dispensing head may also define a pump chamber and an actuation wall on which the user can press to put the fluid under pressure in the chamber so as to drive it through the fluid dispenser module of the invention.

The spirit of the invention lies in the fact of improving a conventional fl uid fluid dispenser fluid dispensing module by adding additional functionality to manage the venting of the fluid reservoir. An interesting aspect of the invention is that a single valve makes it possible to open and close, advantageously simultaneously, both the fluid product flow path and the venting path.

The invention will now be described in more detail with reference to the accompanying drawings, giving by way of non-limiting examples two embodiments of the invention.

In the figures:

FIG. 1 is a vertical cross-sectional view through a fluid dispenser according to a first embodiment of the invention,

FIGS. 2 and 3 are greatly enlarged views of the dispensing head of the dispenser of FIG. 1, respectively in the rest position and in the actuated position,

FIGS. 4 and 5 are greatly enlarged views of the fluid dispenser module of the invention, respectively in the rest position and in the actuated position,

FIGS. 6 and 7 are respectively similar to FIGS. 2 and 3 for a second embodiment of the invention,

FIGS. 8a and 8b are views in vertical cross section through a fluid dispenser according to a third embodiment of the invention, respectively in the rest position and in the actuated position, and

Figures 9a to 9e are vertical cross-sectional views through a fluid dispenser module according to a second embodiment, in different phases. Referring firstly to Figure 1 to generally describe a fluid dispenser incorporating a fluid dispenser module M according to the invention.

The fluid dispenser comprises two distinct entities, namely a fluid reservoir R and a fluid dispenser head T.

The fluid reservoir R may be made of any suitable material, such as glass, plastic, metal, etc. It can be any shape, but includes an opening in the form of a collar R1. The reservoir R contains a fluid product which may be a perfume, a lotion, a cream, a pharmaceutical solution, etc. The reservoir R and its contents are not critical for the present invention.

The fluid dispensing head T is fixedly and sealingly mounted on the neck R1 of the fluid reservoir R. The head T comprises a head body T1 which can be made by injection / molding of plastics material. This head body T1 comprises a fixing ring T1 1 which engages with the outside of the neck R1. The fixing ring T1 1 may be a ring to be screwed, snap-in, crimp, etc. The head body T1 also comprises, inside the fixing ring T1, a sleeve T12 in which is engaged a support member T2 forming a seat for a ball T21. A dip tube T22 is also connected to this support piece T2. The dip tube T22 extends inside the tank R to near its bottom. Above the support piece T2, the head body T1 forms a fluid duct T13 which connects to a mixing chamber T14. The head body T1 also forms a connection housing T15 in which is engaged a connection T3 on which is mounted an air flush T4, for example in the form of a crushable pear. Thus, the inside of the air flush T4 communicates with the mixing chamber T14 through the connection T3 engaged in the connection housing T15. On the other hand, the mixing chamber T14 communicates with a mounting chamber T16 in which a fluid dispensing module M is received. It can also be noted that the head body T1 forms a vent pipe T17 which connects the mounting housing T16 with the inside of the tank R between the sleeve T12 and the body R1. This is the general structure of the dispensing head T, which should not be considered as unique in the context of the present invention, which focuses more particularly on the design of the fluid dispenser module M.

Referring now to Figures 2 and 4 which respectively represent the dispensing head T (without the flush T4) and the fluid dispensing module M in the rest position, that is to say when hunting T4 air is not subjected to any crushing force. As mentioned above, the dispensing module M is positioned in the mounting housing T16 so as to communicate with both the mixing chamber T14 and the venting duct T17.

In Figure 4, it can be seen that this distribution module M comprises a mounting body 1 which is fixedly received in the mounting housing T16. This mounting body 1 comprises an inlet sleeve 12 defining internally a fluid product inlet 13 which is positioned directly downstream of the mixing chamber T14. The mounting body 1 also forms a vent hole 1 1. The dispensing module M also comprises an insert part 2 which is fixedly received inside the mounting body 1. This insert piece 2 comprises a sliding shaft 20, a pin 25 and an annular flange 26 which surround the pin 25 so as to form between them an annular space 24. The sliding shaft 20 comprises a cylindrical inner wall and a wall external which engages with the inner wall of the mounting body 1. The sliding barrel 20 comprises a plurality of through openings, namely a first lateral opening 21, a second lateral opening 27 and a third lateral opening 28. The insert piece 2 also forms a fourth lateral opening 23 at the annular flange 24 , so that the fourth lateral opening 23 gives directly into the annular space 24. On the other hand, the insert piece 2 comprises a first external groove 22 which connects the first lateral opening 21 with the fourth lateral opening 23. The first groove 22 is completed by the inner wall of the mounting body 1 so as to form a connecting pipe which connects the first opening 21 with the fourth opening 23. On the other hand, the insert part 2 forms a second bleed 29 which connects the third lateral opening 28 with the outside. This groove 29 is completed by the inner wall of the mounting body 1 so as to form an external air inlet duct.

The dispensing module M also comprises a movable member 3 which has a substantially H-shaped section. More specifically, this movable member 3 comprises a first annular piston lip 32 and a second annular piston lip 33 which are designed to slide from one to the other. The two lips 32 and 33 are connected together by a section of reduced diameter 34 which does not come into sealed sliding with the sliding shaft 20. The movable member 3 also comprises a partition wall 31 which prevents any passage through the movable member 3.

The dispensing module M also comprises a spring 4 which is disposed inside the sliding shaft 20 and is supported on the one hand on the insert part 2 and on the other hand on the partition wall 31 of the movable member 3 passing through the second piston lip 33.

In this embodiment, the dispensing module M also comprises a nozzle 5 which is engaged in the annular space 24 around the pin 25 inside the annular flange 26. This nozzle 5 has a completely conventional design with a dispensing orifice 50, a swirl chamber 51, several swirling channels 52 and one or more connecting passage (s) 53. This nozzle makes it possible to dispense the fluid product in the form of fine droplets. However, we can imagine other types of sprinklers without departing from the scope of the invention.

FIG. 4 shows the distribution module M in the rest position, in which the spring 4 pushes the movable member 3 against a radial shoulder 14 formed at the downstream end of the fluid product inlet 13. More precisely it is the first piston lip 32 which thus comes into contact supported by the spring 4 against this radial shoulder 14 so as to create a sealed annular contact. This sealed annular contact is added to the radial annular contact of the first piston lip 32 with the sliding shaft 20. This creates a double seal, both axial and radial. It should especially be noted that the first lateral opening 21 is closed by the movable member 3, since it is located between the two piston lips 32 and 33. Thus, the fluid inlet 13 can not communicate with the first lateral opening 21. On the other hand, it can be seen that the second piston lip 33 closes the second lateral opening 27 which communicates with the vent pipe D17 through the hole 1 January. In sum, the first piston lip 32 intersects the communication between the fluid inlet 13 and the first lateral opening 21 and the second piston lip 33 isolates the first lateral opening 21 and literally closes the second lateral opening 27 in the rest (Figures 2 and 4).

It can also be said that the fluid inlet 13, the first lateral opening, the first groove 22, the fourth lateral opening 23, the annular space 24, the connecting passages 53, the swirling channels 52, the chamber The swirl 51 and the dispensing orifice 50 together form a fluid flow path Cp which is cut by the movable member 3. On the other hand, it can be said that the second lateral groove 29, the third lateral opening 28 , the inside of the sliding barrel, the second lateral opening 27 and the lateral hole 1 1 form an air venting path Ca which is cut at the level of the second lateral opening 27 by the movable member 3.

Reference will now be made to FIGS. 3 and 5 to describe the dispensing module M during a fluid dispensing phase. To actuate this dispenser, the user grasps the air flush T4 and crushes it so as to generate a flow of pressurized air through the narrow fitting and the mixing chamber T14. This pressurized air drum enters the dispensing module M through the fluid product inlet 13. This pressurized air drum creates a Venturi effect which has the effect of sucking up the fluid stored in the reservoir R. through the dip tube 22, the support piece T2 by pushing the ball T21 and the conduit T13 which opens into the mixing chamber T14. Consequently, the fluid product coming from the tank R mixes with the pressurized air stream coming from the flushing T4 at the mixing chamber T14. As a result, it is a two-phase mixture of fluid and air that passes through the fluid inlet 13. Since this two-phase mixture is under pressure, it will move the movable member 3 inside the sliding shaft 20 by compressing the spring 4. The first piston lip 32 will thus move in leaktight sliding inside the sliding shaft 20 until it reaches the level of the first lateral opening 21. The sealed stroke of the movable member 3 defines a precompression stroke during which the fluid flow path Cp is not yet open. It is therefore necessary that the two-phase mixture reaches a certain pressure threshold to move the first piston lip 32 at or even beyond the first lateral opening 21, as shown in FIG. 5. The fluid product flow path Cp is then established by connecting the fluid product inlet 13 to the first lateral opening 21 by passing through a portion of the sliding drum 20. The fluid product P can thus proceed to the dispensing orifice 50 where it is distributed in powdered form. Thus, the movable member 3 behaves like a valve by selectively masking and unmasking the first lateral opening 21. It can be considered that the sliding shaft 20 forms a valve seat on which the first piston lip 32 slides sealingly.

It should also be noted that the venting path Ca is also open since the second lateral opening 27 and the third lateral opening 28 can communicate. Indeed, the two piston lips 32 and 33 are located on either side of these two lateral openings 27 and 28 so that the narrowed section 34 of the movable member 3 is positioned at its two lateral openings 27 and 28, thereby forming a connecting passage between the two openings. Outside air can thus penetrate inside the tank through the second groove 29, the third lateral opening 28, the inside of the barrel. sliding 20, the second lateral opening 27, the lateral hole 1 1, the venting passage T17 and between the sleeve T12 and the neck R1.

As soon as the crushing force on the flush T4 is released, the pressure at the inlet fluid product 13 drops and the spring 4 pushes the movable member 3 in its rest position of Figure 4. The fluid product flow path Cp is again cut, as well as the venting path Ca. It may be noted that the two paths Cp and Ca are simultaneously established and cut simultaneously.

In Figures 6 and 7, there is shown a second embodiment for the fluid dispensing head. This dispensing head T 'may be identical or similar to that of the first embodiment on certain points, and especially its entire lower part, forming the fixing ring T1 1, the sleeve T12, the support piece T2, the conduit of T13 connection, the mounting housing T16 and the venting duct T17. On the other hand, this dispensing head T 'is distinguished from the first dispensing head T in that it comprises a flexible dome T5 which is sealingly mounted by means of an anchoring flange T55 on the head body ΤΎ . This flexible dome T5 comprises an elastically deformable actuating wall T52 which internally defines a pump chamber T50. By deforming the actuating wall T52, as shown in FIG. 7, the internal volume of the chamber T50 decreases, and the fluid it contains is pressurized so that it is forced through a connection chamber T14 'in the fluid product inlet 13 of the dispensing module M. The fluid product then pushes the movable member 3, as shown in Figure 5, so that the fluid can flow through the dispensing module M to be sprayed through the dispensing orifice 50. During this dispensing phase, the pressure of the fluid fluid of course plate the ball 21 on its seat. As soon as the user releases his pressure on the deformable actuating wall T52, a depression is created inside the chamber T50 which has the effect of strongly pressing the movable member 3 against the radial shoulder 14 and lifting the T21 ball so the product fluid from the tank R can then go up through the dip tube 22, the connecting pipe 13 to reach the pump chamber T50.

Referring to FIGS. 8a and 8b, there is shown a fluid dispenser of the "squeeze bottle" type, that is to say with a fluid reservoir R "comprising a deformable wall R2, which the user can grasp The dispenser also comprises a dispensing head T "which is mounted on an opening of the tank R" by means of a fixing ring T1 1. This head T "also comprises a tube holder T2 "in which is fitted one end of a dip tube T22 which extends into the tank R" to near its bottom. The head T "also forms a connecting duct T13 and a connecting chamber T14" upstream of the tube holder T2 '. This chamber T14 "communicates with a mounting housing T16 in which a fluid dispensing module M, which may be identical to that of the preceding figures, is received Finally, the head T" comprises a vent pipe T17 which connects the housing

T16 to the tank R ".

By crushing the deformable wall R2, fluid product stored in the tank R "is forced through the dip tube T22, the connecting pipe T13 and the connecting chamber T14" to reach the inlet 13 of the module M, as visible in Figure 8b. The module M then behaves in the same manner as previously described with reference to FIGS. 3, 5 and 7.

This third embodiment is intended to show that the module M of the invention can be implemented in various applications: pear dispenser, crushable dome dispenser or "squeeze bottle".

In Figure 9a, there is shown a fluid dispenser module M 'having a different design. Indeed, this module M 'comprises:

a mounting body 1 'intended to be fixedly received in a mounting housing of a dispensing head, this mounting body 1' defining a first sliding shaft 15 'and a second sliding shaft 16', as well as a first opening 11 ', a second opening 18' and a groove 19 'at the first sliding shaft 15', - A movable member 2 'sealingly mounted in both sliding barrels 15' and 16 ': the movable member 2' comprising two lips 22 'and 23' in sealing sliding contact in the first sliding shaft 15 'and another lip 21 'in sealing sliding contact in the second sliding shaft 16',

- A valve member 3 'fixedly mounted in the movable member 2': the valve member 3 'comprising a valve lip 31' sealingly against a valve seat 20 'of the movable member 2',

- A spring (4) which acts between the mounting body 1 'and the movable member 2' to bias the movable member 2 'in the rest position.

Optionally, the mounting body 1 'can be provided with a nozzle 5', which can spray the fluid into fine droplets. This nozzle 5 'may comprise a spray wall pierced with several spray holes of reduced diameter (1 to 100 microns).

It can be seen that a suction chamber Cs is formed at the second sliding shaft 16 '. This chamber Cs has a variable volume because the movable member 2 ', with its valve member 3', moves by sliding in the second sliding shaft 16 '.

When the module M 'is at rest (Figures 9a and 9e), the two lips 22' and 23 'are positioned on either side of the opening 1 1', so as to isolate it. On the other hand, the valve lip 31 'is in sealing engagement against its seat 20'.

When pressurized fluid arrives at the inlet 13 'of the module M', the movable member 2 ', with its valve member 3', slidably moves in the second sliding shaft 16 'as shown in Figure 9b, so that the two openings 1 1 'and 18' communicate with each other through the inside of the barrel 15 ', between the two lips 22' and 23 ', at the thinned portion 24'. A venting path Ca is thus established through the groove 19 ', the opening 18', the inside of the barrel 15 'and the opening 1 1'. Outside air can then be routed along this vent path Ca to the fluid reservoir, to balance its internal pressure. It should be noted in FIG. 9b that the valve lip 31 'is always in tight abutment against its seat 20'. Only when the pressure of the fluid reaches a predetermined precompression threshold does the valve lip come off its seat 20 ', as shown in FIG. 9c. A fluid product flow path Cp is thus established through the inlet

13 ', the passage 35', the gap between the valve lip and its seat 20 ', the suction chamber Cs and the nozzle 5'. It should be noted that the venting path Ca is also established at this time.

As soon as the pressure of the fluid product falls below the predetermined precompression threshold, the valve lip 31 'finds its sealing support against its seat 20', thus breaking the flow path of fluid product Cp, whereas the pressure path Venting Ca is still established, as shown in Figure 9d, which is identical to Figure 9b.

Finally, when the fluid no longer exerts pressure on the module M ', it returns to its rest position, as shown in Figure 9e, which is identical to Figure 9a. The run cycle is complete.

During this cycle, the suction chamber Cs sees its volume vary: indeed, at rest, its volume is maximum and in Figures 9b, 9c and 9d, its volume is minimal. This means that the increase in volume of the suction chamber Cs passing from Figure 9d to Figure 9e has the effect of creating a vacuum in the suction chamber Cs that will suck the fluid located at the nozzle 5 ', and thus empty it, at least partially. This suction or "sniffing" effect is particularly useful and effective with nozzles with micro-spray holes (1 to 100 microns).

Thus, this module M 'combines several functions: fl uid fluid valve, tank venting and jet evacuation. It should be noted that the discharge function of the nozzle could be implemented independently of the other two functions and be protected in itself, especially in combination with a micro-hole spray nozzle. Thanks to the distribution module M, M ', outside air can penetrate inside the fluid reservoir during the fluid product distribution phase by taking the venting path Ca. Generally, it is necessary to note that the dispensing module of the invention is devoid of means for putting the fluid under pressure. Indeed, the pressurizing means are associated with the dispensing head T in the form of an air flush T4, are integrated with the dispensing head T 'in the form of a T5 flexible dome or are integrated to the tank R "in the form of the deformable wall R2 It may even be said that the dispensing module of the invention does not participate actively in pressurizing the fluid product.It is completely passive and reacts only to the product. pressurized fluid that is fed at its inlet.

With the distribution module M, M 'of the present invention, it is possible to simplify the design of a pump, since the outlet valve is formed by the distribution module. In addition, this module M, M 'also manages the venting of the tank. Its mounting in the mounting housing T16 is extremely simple, since it is simply engaged axially and held in place by friction forces, or even attachment profiles at the inlet sleeve 12.

Claims

claims

1. Fluid fluid distribution module (M; M ') intended to be integrated in a fluid dispensing head (T; T'; T ") mounted on a fluid reservoir (R), the dispensing module of fluid product (M; M ') comprising a fluid product inlet (13; 13'), a dispensing orifice (50) and a fluid product flow path (Cp) between the fluid product inlet (13; 13 ') and the dispensing orifice (50), the dispensing module (M; M') further comprising a valve (3, 20; 3 ', 2') selectively cutting said fluid flow path ( Cp), said valve (3, 20; 3 ', 2') opening under a predetermined pressure of the fluid product in the flow path of fluid product (Cp) upstream of the valve (3, 20; 3 ', 2 '), characterized in that it further comprises a venting path (Ca) for ventilating the fluid reservoir (R).

2. - Fluid product distribution module (M; M ') according to claim 1, wherein the valve (3, 20; 3', 2 ') selectively cuts said venting path (Ca).

3. - fluid dispenser module (M) according to claim 2, wherein the valve (3, 20) comprises a movable member (20) which simultaneously closes a first lateral opening (21) of the product flow path fluid (Cp) and a second lateral opening (27) of the venting path (Ca) in a rest position, under the action of a spring (4), and which releases these two lateral openings (21, 27) in an open position under the pressure of the fluid product upstream of the movable member (3) against the spring (4).

4. - Fluid dispenser module (M) according to claim 3, wherein the movable member (3) comprises two lips piston (32, 33) which slide in a sealing manner in a sliding shaft (20) which forms the two lateral openings (21, 27), the two piston lips (32, 33) closing the two lateral openings (21, 27) in the rest position.

5. - fluid dispenser module (M) according to claim 3 or 4, wherein the movable member (30) comes into sealing abutment in the rest position under the action of the spring (4) against a radial shoulder ( 14) fluid flow path (Cp).

6. - Fluid product dispensing module (M) according to any one of the preceding claims, comprising:

- a mounting body (1) intended to be fixedly received in a mounting housing (T16) of the dispensing head (T, T; T "),

- an insert part (2) fixedly received in the mounting body

(1), the insert piece (2) forming a sliding shaft (20),

- a movable member (3) slidably mounted in the sliding shaft (20),

- A spring (4) which acts between the insert member (2) and the movable member (3) for biasing the movable member (3) in the rest position.

The fluid dispenser module (M) according to claim 6, wherein the slide shaft (20) forms a first lateral opening (21) of the fluid flow path (Cp) which is masked in position. resting by the movable member (3) and disengaged by the movable member (3), preferably only after a precompression tight race.

8. - Fluid product dispensing module (M) according to claim 7, wherein the first lateral opening (21) is connected downstream to a first groove (22) formed by the insert piece (2), this first bleeding (22) communicating downstream with the dispensing orifice (50), which is advantageously formed by a nozzle (5) mounted on the insert piece (2).

9. - fluid dispensing module (M) according to claim 6, 7 or 8, wherein the sliding shaft (20) forms a second side opening (27) of the vent path (Ca) which is masked in rest position by the movable member (3).

10. - Fluid dispensing module (M) according to claim 9, wherein the sliding shaft (20) forms a third lateral opening (28) of the venting path (Ca) which communicates with the second lateral opening ( 27), when it is disengaged by the movable member (3), this third lateral opening (28) being connected to a second groove (29) formed by the insert piece (2), this second bleed (29) opening on the outside of the fluid dispenser module (M).

1 1. - Fluid product dispensing module (M) according to any one of the preceding claims, without means for pressurizing the fluid product.

12. - Fluid dispensing head (T; T; T ") comprising a mounting housing (T16) in which is fixedly received a fluid dispenser module (M) according to any one of the preceding claims.

13. - Fluid product dispenser comprising a fluid reservoir (R) and a fluid dispensing head (T; Τ 'T ") according to claim 12, mounted on the fluid reservoir (R).

14. - fluid dispenser according to claim 13, wherein the fluid dispensing head (T; T) comprises means for putting the fluid under pressure.

15. - fluid dispenser according to claim 13, wherein the fluid dispensing head (T) comprises:

an air flush (T4), such as a flexible pear, capable of undergoing crushing and elastic expansion phases, the flushing (T4) being connected to the fluid inlet (13) fluid product dispensing module (M) for supplying a flow of pressurized air through the fluid product flow path (Cp) to the dispensing orifice (50) during the elastic crushing phases , and

a fluid product duct (T13) also connecting to the fluid product inlet (13) of the fluid product distribution module (M), the fluid product in the duct (T13) being sucked by the air flow under pressure by Venturi effect, so as to distribute a mixture of air and fluid through the dispensing orifice (50).