Liquid product dispenser

Abstract

A dispenser comprising: a) a reservoir module (R') including a housing (R1') receiving a fluid cartridge (C) defining a movable wall (C2) actuated by a spring (R4) resting on a support (R31); b) a dispensing module including an outlet valve for controlling the passage of the fluid issued under pressure from the fluid cartridge (C), wherein the reservoir module (R') is removably connected to the dispensing module, characterized in that the support (R31) of the spring (R4) is movable relative to the housing (R1') between an active position in which the spring (R4) is compressed and a rest position in which the spring (R4) is relaxed, thus allowing the reservoir module (R') to be connected to the dispensing module with the support (R31) in the rest position, and then the support (R31) to be moved to the active position. (Figure for abbreviation: Figure 7a)

Description

Title of the invention: Fluid product dispenser

[0001] The present invention relates to a fluid product dispenser comprising two separable modules, namely: - a reservoir module comprising a casing receiving a fluid product cartridge defining a movable wall (for example a piston) actuated by a spring resting on a support, so as to move the movable wall to expel fluid product from the fluid product cartridge, and - a distribution module comprising an outlet valve controlled by an actuation element to control the passage of the fluid product issued under pressure from the fluid product cartridge.

[0002] The reservoir module is removably connected to the dispensing module, allowing the fluid cartridge to be removed from the casing, particularly for replacement with a new cartridge. The primary application of the present invention is in the cosmetics or pharmaceutical industries: the dispenser allows, for example, the continuous application of a cream or ointment to the skin, mucous membranes, or hair.

[0003] Replacing the cartridge in this type of dispenser is often a complicated operation, as it requires reconnecting the two modules with the spring that presses against the moving wall of the cartridge. This demands dexterity and strength. Furthermore, the cartridge is usually sealed by a cap that is pierced during the assembly of the two modules. Improper handling can then lead to a loss of liquid product.

[0004] The object of the present invention is to remedy the aforementioned disadvantages of the prior art by defining a distributor in which the assembly of the two modules and the pressurization of the fluid product are consecutive, and not simultaneous: the pressurization being carried out once the assembly of the modules has been completed.

[0005] To achieve this goal, the present invention proposes that the spring support be movable relative to the casing between an active position in which the spring is compressed and a rest position in which the spring is relaxed, thus allowing the reservoir module to be connected to the dispensing module with the support in the rest position, and then the support to be moved to the active position. In this way, the spring does not act on the cartridge during the assembly of the modules: the fluid stored in the cartridge is at atmospheric pressure. Only subsequently is the support returned to its active position, thus compressing or winding the spring, which will then act again on the movable wall of the cartridge and pressurize the fluid it contains.

[0006] According to one embodiment, the spring can be arranged between a thrust member and a support member that slide relative to each other and to the cartridge. The thrust member forms a thrust head in contact with the moving wall of the fluid cartridge, and the support member forms the support. The spring acts between the thrust head and the support, so as to force the thrust and support members apart. In other words, the thrust and support members slide within each other, compressing / relaxing the spring. The thrust head and the support are advantageously located at opposite ends of the thrust and support members, so that the spring extends along the entire length of both members.

[0007] According to one feature of the invention, the support piece can be fixed to the case in the active position, the pusher piece, when the discharge flap is opened, being movable relative to the case and the support piece in the active position. In short, only the pusher piece moves within the case to push the movable wall of the cartridge.

[0008] Advantageously, the support piece and the push piece are in mutual contact in the rest position with the spring relaxed. The support piece and the push piece in mutual contact are movable relative to the case when a cartridge full of fluid is not present. The spring does not need to be fully extended; it is sufficient that it be in its most relaxed state, preferably close to its fully extended state. The spring may or may not exert a slight force on the two pieces in mutual contact. When the cartridge has been removed from the case, the assembly formed by the push and support pieces in mutual contact can slide within the case, at least through a certain range of motion.

[0009] According to another feature of the invention, the support piece can be removably snapped onto a gripping profile of the case in the active position. Thus, it is sufficient to fully push the support piece into the case to achieve snapping. According to a particularly advantageous feature, the push piece includes a release profile that acts on the support piece to release it from its snapping with the case when the fluid cartridge is emptied. Preferably, the support piece forms at least one flexible snapping tab provided with a snapping tooth adapted to snap into contact with the gripping profile of the case, the release profile of the push piece deforming the flexible snapping tab so as to disengage the snapping tooth from the gripping profile of the case.Advantageously, the spring forces the push and support parts apart when the release profile acts on the support part, so that the support part, once released from its snap-fit ​​with the case, is moved by the spring out of the case into the rest position, thus giving the user a visual, audible and / or tactile indication that the fluid product cartridge is empty.

[0010] According to another aspect of the invention, the thrust piece can be moved in The housing moves between a full stop position and an empty stop position, corresponding respectively to the full and empty states of the fluid cartridge. Advantageously, the support is in the active position when the pusher is moved by the spring from its full stop position to near its empty stop position. Preferably, the support is moved to the rest position when the pusher reaches its empty stop position.

[0011] Moreover, the outlet valve is advantageously stressed in a closed state by the fluid product under pressure.

[0012] According to another advantageous embodiment, the reservoir module may further comprise a satellite, which cooperates with both the casing and the support piece to switch between the active and rest positions. Preferably, the satellite is captive within the support piece with limited axial displacement and rotational movement, the satellite selectively engaging stably with the casing in the active position. Furthermore, the support piece may comprise at least one rotational drive cam to rotate the satellite. Advantageously, the casing may comprise at least one locking cam and one ejection cam, the satellite comprising at least one lug that slides on the locking and ejection cams under the action of the spring, which acts on the satellite via the support piece. The casing may form an axial stop, the satellite then being forced against this axial stop by the support piece.

[0013] According to a practical embodiment, - the case may include at least one locking cam and one ejection cam connected by a stop wall, an axial stop and at least one axial chimney, - the support piece may include an axial stroke limiting stop and at least one rotational drive cam, - the satellite may include at least one lug, which defines a sliding surface, a thrust ring and teeth.

[0014] In this case, the teeth engage with the rotating drive cam to rotate the satellite during the spring compression phases. The thrust ring engages with the axial travel limiting stop during the spring release phases. The lug moves within the axial channel and between the locking and ejection cams and the axial stop under the load of the support piece. The sliding surface makes sliding contact with the locking and ejection cams. The lug makes contact with both the locking cam and the stop wall in the active position. The rotating drive cam rotates the satellite when the lug is in contact with the axial stop. Thus, the complete cycle of the lug is as follows: the lug is first moved axially within the axial channel by bearing against the support piece until it comes into contact with the axial stop; the lug is then moved... The rotation is driven by the rotating drive cam. The lug then contacts the locking cam when the support piece is released: the lug slides along the locking cam until it contacts the stop wall, marking the active position. The lug then slides against the stop wall, bearing against the support piece, until it contacts the axial stop: the lug is then rotated by the rotating drive cam. The lug then contacts the ejection cam when the support piece is released. Finally, the lug slides along the ejection cam until it falls into another axial channel.

[0015] This mechanism and its operation are similar to those of retractable pens operated by pressing a button at the end. A first press of the button followed by a release extends the pen tip and locks it in the active writing position. A second press followed by a release retracts the tip. This same principle is used in the present invention to wind / unwind the spring. Starting from the active position, a first press on the support piece followed by a release diswinds the spring, and a second press followed by a release winds the spring again.

[0016] The invention also defines a method for loading a dispenser as defined above, comprising the following successive steps: a) Position the support in its resting position, b) disconnect the reservoir module from the dispensing module, c) insert a fluid product cartridge into the case, d) connect the reservoir module to the dispensing module, e) move the support to the active position.

[0017] Steps a) and b) may optionally be reversed: the essential thing is that the connection is made with the support in the rest position.

[0018] Advantageously, the support automatically returns to its rest position when the fluid cartridge is emptied. Step a) is therefore automatic and does not require user intervention. As previously noted, the pusher, when it reaches the end of its stroke, acts on the support to release it from its engagement with the cartridge.

[0019] The spirit of the present invention lies in disarming the spring to allow the two modules to be connected without being hindered by the pressure exerted by the spring. This disarming can result from a user action, but preferably, it is automatically triggered when the cartridge has been emptied of its contents. Thus, the user does not have to worry about disarming the spring and also receives a visual, audible, and / or tactile indication that the cartridge is empty. Indeed, the release of the support can, of course, be seen, since it moves relative to the case, but it can also generate a sound and / or a small shock in the dispenser. the user can feel it in their hand.

[0020] The invention will now be described more fully with reference to the accompanying drawings, giving by way of non-limiting example, one embodiment of the invention.

[0021] In the figures:

[0022] [Fig-1] [Fig. 1] is a perspective and partially transparent view of a fluid product dispenser of the invention in an operating state,

[0023] [Fig.2] [Fig.2] is a view similar to that of [Fig.1] with the distributor in a resting state,

[0024] [Fig.3a] Fig.3a is an exploded perspective view of the distribution module of the distributor in Figures 1 and 2,

[0025] [Fig.3b] The [Fig.3b] is an exploded perspective view of the dispenser tank module of the [Fig.1],

[0026] [Fig.3c] Fig.3c is an exploded perspective view of the fluid product cartridge of the dispenser shown in Figures 1 and 2.

[0027] [Fig. 4a] Figures 4a, 4c, 4d, 4e and 4f are longitudinal cross-sectional views through the reservoir module of the dispenser of the invention under different conditions intended to illustrate the operation of this reservoir module,

[0028] [Fig.4c] cf [Fig.4a]

[0029] [Fig.4d] cf [Fig.4a]

[0030] [Fig.4e] cf [Fig.4a]

[0031] [Fig.4f] cf [Fig.4a]

[0032] [Fig.4b] [Fig.4b] is a highly enlarged view of a detail of [Fig.4a],

[0033] [Fig.5] Fig.5 is a perspective view of the distribution module of the distributor of the invention,

[0034] [Fig.6a] Figures 6a and 6b are longitudinal cross-sectional views through the distribution module of the [Fig.5], respectively in rest position and in actuated position, and.

[0035] [Fig.6b] cf [Fig.6a]

[0036] [Fig.7a] Figures 7a and 7b are cross-sectional views through the distributor according to a second embodiment of the invention, respectively in the rest and operating positions,

[0037] [Fig.7b] cf [Fig.7a]

[0038] [Fig.8] Fig.8 is a perspective cutaway view showing the inside of the dispenser,

[0039] [Fig.9] Figures 9, 10 and 11 are enlarged perspective views of the parts visible in [Fig.8], and

[0040] [Fig. 10] cf [Fig. 9]

[0041] [Fig. 11] cf [Fig. 9]

[0042] [Fig. 12a] Figures 12a to 12j are diagrams illustrating the different stages of operation of the distributor of figures 7a to 11.

[0043] [Fig. 12b] see [Fig. 12a]

[0044] [Fig. 12c] see [Fig. 12a]

[0045] [Fig.l2d] cf [Fig. 12a]

[0046] [Fig. 12e] see [Fig. 12a]

[0047] [Fig. 12f] see [Fig. 12a]

[0048] [Fig. 12g] see [Fig. 12a]

[0049] [Fig. 12h] see [Fig. 12a]

[0050] [Fig.l2i] cf [Fig. 12a]

[0051] [Fig.l2j] cf [Fig.l2a]

[0052] The fluid product dispenser used to illustrate the present invention is of a particular type, since it is an applicator comprising an application head D7 that not only dispenses the fluid product but also applies it to the desired target surface, which may be skin, nails, hair, etc. It should be understood that the invention is not limited to this particular type of dispenser / applicator but applies to any type of dispenser.

[0053] The distributor of the invention comprises two distinct sub-assemblies that can be removably connected together, namely a reservoir module R and a distribution module D, which can be assembled and separated by means of a removable or reversible connection, such as a screw connection, a snap-fit ​​connection, a bayonet connection, etc. In the distributor illustrating the invention, the removable connection is a bayonet connection incorporating a suitable housing D32 for receiving a lug R13. Thus, by relative rotation between the reservoir module R and the distribution module D, the lug R13 can be inserted into / extracted from the housing D32. Several housings D32 and several lugs R13 can be provided for a balanced connection.

[0054] Generally, the reservoir module R includes a housing RI designed to removably hold a fluid cartridge C. To actuate this cartridge C, the reservoir module R includes a thrust member R2 which cooperates with a support member R3. Although not visible in Figures 1 and 2, a spring acts between the thrust member R2 and the support member R3. Figures 1 and 2 show that the support member R3 includes a support R31, as well as flexible snap-on tabs R32. The reservoir module R will be described in more detail below.

[0055] The distribution module D, as seen in Figures 1 and 2, comprises a body D1, at the upper end of which is mounted the application distribution head D7. At its opposite end, the distribution module D comprises a base D3 integral with the DI body and forming the D32 housing. The DI body forms a window in which a D62 push button is located. Optionally, the distribution module D includes a removable protective cover D8, which engages with the DI body or the D3 base.

[0056] Referring to [Fig. 3a], all the component parts of the distribution module D can be seen. It should be borne in mind that this is only a non-limiting embodiment. The distribution module D comprises the body D1, the application distribution head D7, the base D3, the protective cover D8, as well as a shuttle D2 supporting an outlet valve D4, a spring D5, a flat seal Dr, a toggle joint D61, and a pusher D62, which together form an actuating element D6. The toggle joint D61 can be made in one piece or in two pieces. It can even be made as a single unit with the pusher D62.

[0057] In [Fig.5], the distribution module D is seen in perspective in the assembled state. The body D1, the application distribution head D7, the pusher D62, the base D3 with its bayonet housing D32, and part of the outlet valve D4 can be distinguished.

[0058] The operation of this distribution module D is more easily understood from Figures 6a and 6b. The body Dl includes a lateral window D16, in which the pusher D62 is housed. The body Dl is traversed by a conduit DU which defines upstream a sliding end D12 and includes downstream a shut-off valve D18. Further downstream, the body Dl includes an anchoring housing D17 for an anchoring heel D73, which is part of the application distribution head D7. It can also be noted that the head D7 is traversed by a channel which terminates in a distribution orifice D71 at the level of an application surface D72. The sliding end D12 can be said to be fluidically connected to the distribution orifice D71 by way of the valve D18 and the anchoring heel D73.

[0059] The base D3 is fixedly mounted on the body Dl as mentioned above: the base D3 forms one or more bayonet sockets D32. The base D3 also contains the shuttle D2, which includes a sliding sleeve D22 engaged in a sealing and sliding manner on the sliding end D12 of the body Dl. The shuttle D2 internally defines a passage D21 that communicates with the conduit Dl 1. The outlet valve D4 is fixedly mounted on the shuttle D2 and internally defines a valve channel D41, which extends into lateral outlets D42. The outlet valve D4 also includes a sealing element D43, which may be in the form of an O-ring that bears tightly against the base D3. The sealing element may also be formed on the base D3. The spring D5 bears against the base D3 and forces the shuttle D2 towards the body D1, that is to say in a direction where the sliding, sealed joint between the sleeve D22 and The D12 nozzle is at its maximum. This is shown in [Fig. 6a], which corresponds to the rest position of the distribution module D. It can be noted that the seal Dr is mounted in the base D3.

[0060] The actuating member D6, which includes the toggle joint D61 and the pusher D62, acts between the body DI and the shuttle D2 to move the shuttle D2 away from the body D1, thereby disengaging the sealing element D43 from the base D3. This is shown in [Fig. 6b]. To achieve this, the toggle joint D61 bears on the body D1 on one side and on the shuttle D2 on the other. By bearing laterally on the pusher D62, the toggle joint D61 is deformed, which causes the shuttle D2 to move to the right in Figures 6a and 6b, i.e., away from the body D1. This movement occurs against the force exerted by the spring D5. Thus, the D61 knee joint constitutes a means of transforming a radial force into an axial force acting between the body D1 and the shuttle D2 to control the opening of the outlet valve D4.

[0061] This design for the distribution module D is advantageous, but not unique: other designs are conceivable, insofar as the distribution module D includes a controllable outlet valve and can be connected to the tank module R in a removable manner.

[0062] Figure 3c shows the fluid product cartridge C. This cartridge comprises a barrel Cl in which a piston C2 is engaged. The piston slides in a sealed manner inside the barrel Cl to reduce its usable volume. A flexible pouch can also be used instead of the piston. Generally, the cartridge C must include a movable wall, whether sliding like the piston C2 or deformable like a pouch, to define a reservoir of variable volume. The cartridge C, filled with the fluid product, can be sealed by a pierceable or peelable cap (not shown).

[0063] Figure 3b shows the constituent elements of the reservoir module R, namely the casing RI, the thrust piece R2, the support piece R3, and the spring R4. It can be seen that the support module R3 comprises the support R31, as well as flexible snap-on tabs R32 at the opposite end. It can be seen that the flexible tabs R32 form inwardly oriented snap-on teeth R321. The thrust pieces R2 and support piece R3 are designed to be assembled so as to contain the spring R4, which bears against the support R31 of the support piece 3 on one side and pushes the thrust head R20 of the thrust piece R2 against the piston C2 of the fluid cartridge C, thus causing it to slide tightly inside the drum CL.

[0064] Reference will now be made to [Fig. 4a], which shows the reservoir module R in its operating state, corresponding to [Fig. 1]. On the left side of [Fig. 4a], the lower part of the distribution module D can be seen. The casing RI of the reservoir module R is engaged with this distribution module D, in the manner shown above. as mentioned, that is, by a removable bayonet attachment. It can also be noted that the barrel Cl is in a tight seal with the base D3. Thus, the contents of the cartridge C communicate directly with the outlet valve D4. The seal of the cartridge C has, for example, been broken by a suitable profile formed by the base D3.

[0065] According to the invention, the RI case forms internally several profiles R12, which can, for example, be in the form of strips formed as a single piece with the RI case, but separated from the inner wall of the RI case by an access passage R13. This is more clearly visible in [Fig. 4b]. These strips can be straight or curved: their two ends connecting to the inner wall of the RI case. These profiles (or strips) R12 are located approximately in the middle of the RI case and are distributed along an annular line.It can be observed that the flexible locking tabs R32 of the thrust member R3 are engaged through the access passages R13 so that their locking teeth R321 engage with the profiles R12. It can also be observed that the thrust member R2 forms elastic blades R21 that abut against the profiles R12. Thus, the elastic blades R21 engage with the profiles R12 on the same face of the profiles as the locking teeth R321. In this active position, the spring R4 is compressed to its maximum within the assembly formed by the thrust member R2b and the support member R3. The spring R4 bears against the support R31 of the support member R3 and acts directly on the thrust head R20 of the thrust member R2. The spring R4 is engaged mainly inside the thrust piece R2 which forms a cylinder R25 which ends with a shoulder R22 of increased diameter.The thrust piece R2 also includes an inner tube R23 that terminates in a passage opening R24. The support piece R3 extends around the cylinder R25 from its support 31 to its flexible snap-fit ​​tabs R32. Internally, the support piece R3 includes a rod R33 engaged inside the tube R23 through the passage opening R24. This rod R33 terminates in one or more gripping profiles R34, which allow the rod R33 to be inserted into the tube R23, but prevent its extraction by the gripping profiles R34 against the edge of the passage opening R24, as will be seen below. Other means of joining the rod R3 and the tube R23 are also possible.

[0066] Thus, in this active position, the support piece R3 is held in the RI case by the passage of the flexible tabs R32 through the access passages R13 and their snapping onto the profiles (strips) R12: the support 31 comes practically to a stop against the end of the RL case. It can be said that the support R31 is fixed relative to the RI case in this active position. The spring R4, which is compressed to its maximum, therefore acts between the support R31 and the push head R20 of the push piece R2, which is in direct contact with the piston C2 of the cartridge C. The fluid product contained in the Cartridge C is thus under pressure. However, it cannot escape, because the outlet valve D4 is closed.

[0067] By pressing the pusher D62, the outlet valve D4 opens and the pressurized fluid in the cartridge C is forced through the distribution module D to its distribution port D71. The fluid distribution is accompanied by a movement of the piston C2 under the action of the push head R20, which is actuated by the spring R4 resting on the fixed support R31 of the support piece R3. The push piece R2 moves inside the barrel Cl, except for its shoulder R22, which slides inside the support piece R3. The movement of the shoulder R22 within the support piece R3 can be achieved by sliding with or without contact. It can be seen in [Fig. 4c] that the shoulder R22 approaches the flexible snap-fit ​​tabs R32, which engage with the profiles R12. The R33 rod is outside the R23 tube, but the R34 attachment profiles are located inside the R23 tube.Cartridge C is almost empty, since piston C2 reaches the vicinity of outlet valve D4.

[0068] In [Fig.4d], the cartridge C is now empty: the piston C2 is close to the outlet valve D4. It is particularly important to note that the shoulder R22 of the pusher piece R2 is now located at the level of the flexible ratcheting tabs R32, which are forced outwards by the shoulder R22, so as to disengage from their ratcheting with the profiles R12 of the case RL. The shoulder R22 is then in butt against the profiles R12, marking the end of the stroke of the pusher piece R2, and therefore of the piston C2. Under the action of spring R4, the support piece R3 was moved to the right, causing the flexible locking tabs R32 to move or be extracted from the access passages R13 and moving the support 31 away from the end of the case RL. Spring R4 is then in its rest position, relaxed or almost relaxed. This rest position is fixed by the contact of the hook profiles R34 against the edge of the passage opening R24.

[0069] From this point on, the assembly consisting of the pusher piece R2 and the support piece R3 is free to slide inside the case RL. This unit assembly can therefore be moved to the position shown in [Fig. 4e], where it can be seen that the distribution module D has been removed from the case RI and that the empty cartridge C has been extracted from the same case RL. In this open rest position, the elastic blades R21 have been able to extend out of the cartridge C to abut against one face of the profiles R12. Naturally, the gripping profiles R34 are still abutting against the edge of the passage opening R24. The spring R4 is relaxed or almost relaxed. In any case, it is in its most relaxed state.

[0070] It is then understood that it is easy to introduce a new cartridge filled C inside the RI case, until its piston C2 comes to a stop against the head of Pushing the pusher R20 against the pusher head R2. The distribution module D can then be reinstalled on the reservoir module R. Advantageously, the base D3 can form a drilling profile for piercing or cutting the seal that closes the cartridge C. This results in the configuration shown in [Fig. 4f]. It should be noted that the pusher head R20 does not engage the piston C2, since the spring R4 is relaxed. To cock the distributor again, simply push the support R31 with a finger to slide the support piece R3 inside the RI case around the pusher piece R2. The sliding of the support piece R3 compresses the spring R4 and forces the pusher head R20 against the piston C2. The support piece R3 arrives in its final active position, when the flexible snap-on tabs R32 return to snap-on engagement on the profiles R12, after passing through the access openings R13.This final active position is that of [Fig.4a], where we see that the support R31 is again against the end of the case RL.

[0071] Through this complete description of a distributor operating cycle, it can be seen that the movement of the support R31 relative to the RI case releases the pressure exerted by the spring R4, thus allowing the insertion of a new cartridge C into the RI case without being subjected to the thrust of the pusher head R20. In other words, the present invention allows the spring R4 to be disarmed by moving its support R31. Once the cartridge is inserted into the RI case and the dispensing module D is reconnected to the reservoir module R, the spring R4 can be cocked again by moving and locking the support R31 in its active starting position.

[0072] It should also be noted that the release of spring R4 occurs automatically when the cartridge C is emptied of its contents, so that the user does not need to act or manipulate the dispenser to release spring R4. Indeed, it is the pusher piece R2 that acts on the support piece R3 at the end of its stroke to disengage the pusher piece R3 from its grip on the case RL II; this is a particularly advantageous feature in terms of handling.

[0073] The profiles or bars R12 of the RI case fulfill several functions, namely as a snap-on edge for the flexible tabs R32 and as a stop surface for the elastic blades R21 and the shoulder R22.

[0074] The shoulder R22 which allows the flexible snap-on tabs of the profiles R12 to be released fulfills a release function and can therefore be described as release profiles.

[0075] The thrust piece R2 is captive within the RI case, while sliding between two extreme stops, namely a full stop, in which the elastic blades R21 abut against the profiles R12, corresponding to a full state of the cartridge C, and an empty stop, in which the shoulder R22 abuts against the profiles R12, corresponding to a full state of the cartridge C, and corresponding to an empty state of cartridge C. Support R3 is in the active position when the push piece R2 is moved by spring R4 from its full stop to near its empty stop. Support R31 is moved to the rest position when the push piece R2 reaches its empty stop.

[0076] The distributor of the invention makes it possible to define a loading method comprising the following successive steps: a) Place support R31 in the rest position, b) disconnect the reservoir module R from the dispensing module D, c) insert a fluid product cartridge C into the case RI, d) connect the reservoir module R to the dispensing module D, e) move the support R31 into the active position.

[0077] Thanks to the shoulder R22, the support piece R3 is released and the support R31 automatically returns to the rest position, as soon as the fluid product cartridge C is emptied.

[0078] Referring now to Figures 7a, 7b, 8, 9, 10 and 11, a second embodiment can be seen, which differs from the first in the mechanism for winding and unwinding the spring R4. The distribution module D, with its outlet valve D4 controlled by the actuating member D6, may be identical or similar to that of the first embodiment. The cartridge C may also be identical or similar.

[0079] This second embodiment is distinguished by the implementation of a satellite R5, which acts between the support piece R3' and the case RI'.

[0080] More specifically, the RI' casing comprises at least one locking cam R16 and one ejection cam R18 connected by a stop wall R17. The cams R16 and R18 project inside the RI' casing and are curved and inclined. The stop wall R17 is vertical and radial: it extends in a vertical radial plane. The RI' casing also comprises an axial stop R14, which is defined by several radial vertical tabs extending inside the RI' casing. The axial stop R14 is located above the cams R16 and R18, defining a clearance space between them. The RI' casing also defines at least one axial chute R15. As can be seen in [Fig.9], the inner wall of the RI' case forms three identical assemblies each comprising a locking cam R16, a stopping wall R17, an ejection cam R18 and an axial chimney RI5.

[0081] The support piece R3' comprises three rotational drive cams R35, which are here in the form of substantially triangular teeth pointing towards the cartridge C. The support piece R3' also comprises three lugs R37, which are slightly deformable. The three rotational drive cams R35 are arranged between the three lugs R37. The three lugs R37 together form a axial stroke limiting stop R38, in the form of an internal reinforcement defining an annular shoulder.

[0082] The satellite R5 is a single-piece component comprising a substantially cylindrical body R51. As can be seen in [Fig. 10], the satellite R5 includes or forms three lugs R54 at its upper end. These lugs R54 project outwards from the body R51 and each defines an inclined sliding surface R541. At its opposite lower end, the body forms a thrust ring R52 and teeth R53, which project outwards from the body R51. The teeth R53 may be adjacent and extend around the entire periphery of the lower edge of the body R51. The teeth R53 are substantially triangular in shape and point towards the teeth of the rotating drive cams R35.

[0083] The casing RI', the support piece R3', and the satellite R5 cooperate as follows. The teeth R53 of the satellite R5 engage with the teeth of the rotating drive cams to rotate the satellite R5 during the compression phases of the spring R4, i.e., when the user presses on the support piece R3' against the spring R4. The stop ring R52 engages with the axial travel limiting stop R37 during the spring (R4) relaxation phases, i.e., when the user releases pressure on the support piece R3'. The lugs R54 move in the axial grooves R15 and in the defined clearance between the locking cams R16 and ejection cams R18 and the axial stop R14, under the load of the support piece R3'.The sliding surface R541 of the lugs R54 makes sliding contact with the locking cams R16 and ejection cams R18: the lugs come into contact with both the locking cams R16 and the stop walls R17 in the active position. The teeth of the rotating drive cams R35 drive the satellite R5 in rotation when the lugs R54 are in contact with the axial stop R14.

[0084] With reference to figures 12a to 12j, a complete cycle of the path of a lug R54 is described.

[0085] In [Fig. 12a], the lug R45 is at the bottom of the axial chimney R15. This corresponds to the disarmed rest position of [Fig. 7a].

[0086] In [Fig. 12b], the user presses on the support piece R3', so that the tooth of the rotating drive cam R35 engages between two teeth R53 of the satellite, but cannot fully engage between these two teeth, due to the axial guidance of the lug R54 in the axial channel R15. The lug R54 therefore moves axially in the axial channel R15, while being subjected to rotation, but without being able to rotate.

[0087] In [Fig. 12c], the lug R54 has disengaged from the axial guide of the chimney R15 and has come into contact with the axial stop R14: the lug R54 is then rotated by the action of the rotational drive cam R35, whose tooth is then fully engaged between the two teeth R53 of the satellite. It can be noted that the lug R54 is located partially above the locking cam R16.

[0088] In [Fig. 12d], the user released pressure on the support piece R3', causing the rotating drive cam tooth R35 to disengage from the two satellite teeth R53, which are now bearing against the axial travel limiting stop R38. Under the load on the stop R38, subjected to the action of the spring R4, the sliding surface R541 of the lug R54 moved down to catch the locking cam R16.

[0089] In [Fig. 12e], the lug R54 has slid on the locking cam R16 until it contacts the stop wall R17, corresponding to the active armed position. This position is stable, since the lug R54 is actuated by the spring R4, which acts on the stop R38, which is in contact with the teeth R53 of the satellite.

[0090] On [Fig.12f], the user presses on the support piece R3', so that the tooth of the rotating drive cam R35 has returned to engagement between two teeth R53 of the satellite, but cannot fully engage between these two teeth, due to the axial guidance of the stop wall R17.

[0091] On [Fig. 12g], the lug R54 slides against the stop wall R17.

[0092] In [Fig. 12h], the lug R54 is released from the retaining wall R17 and comes into contact with the axial stop R14. The lug R54 has moved in rotation under the action of the rotation drive cam R35: its tooth is again fully engaged between the two teeth R53 of the satellite.

[0093] In [Fig. 12i], the user released pressure on the support piece R3', causing the rotating drive cam tooth R35 to disengage from the two satellite teeth R53, which are now bearing against the axial stroke limiting stop R38. Under the load on the stop R38, subjected to the action of the spring R4, the sliding surface R541 of the lug R54 moved down to slide on the ejection cam R18.

[0094] On [Fig. 12j], the lug R54 left the ejection cam R18 and fell into another axial chimney R15. It returned to the disarmed rest position.

[0095] This type of mechanism with a satellite stressed in axial and rotational displacement by cams and stops is known in itself, but the present invention implements it in a particular application, in which it serves to arm / disarm a spring to allow easy replacement of the distributor cartridge.

[0096] Thanks to the invention, we have a spring-loaded reservoir module whose fluid product cartridge replacement is greatly facilitated by the absence of force exerted by the spring when reconnecting the distribution module.

Claims

Demands

1. A fluid product dispenser comprising: a - a reservoir module (R') including a housing (RI') receiving a fluid product cartridge (C) defining a movable wall (C2) actuated by a spring (R4) resting on a support (R31), so as to move the movable wall (C2) to discharge fluid product from the fluid product cartridge (C), b - a dispensing module (D) including an outlet valve (D4) controlled by an actuating member (D6) to control the passage of the fluid product issued under pressure from the fluid product cartridge (C), wherein the reservoir module (R') is removably connected to the dispensing module (D), so as to allow the fluid product cartridge (C) to be extracted from the housing (RI'), wherein the support (R31) of the spring (R4) is movable relative to the housing (RI') between an active position in which the spring (R4) is compressed and a rest position in which the spring (R4) is relaxed,thus enabling the connection of the reservoir module (R; r') to the dispensing module (D) with the support (R31) in the rest position, and then moving the support (R31) into the active position, the spring (R4) being disposed between a thrust piece (R2') and a support piece (R3') which are movable by sliding relative to each other and to the casing (RI'), the thrust piece (R2') forming a thrust head (R20) in contact with the movable wall (C2) of the fluid product cartridge (C) and the support piece (R3') forming the support (R31), the spring (R4) acting between the thrust head (R20) and the support (R31), so as to force the thrust pieces (R2') and support pieces (R3') apart, characterized in that the reservoir module (R') further comprises a satellite (R5) which cooperates with both the case (RI') and the support piece (R3') to switch between the active and rest positions.

2. Distributor according to claim 1, wherein the support piece (R3') is integral with the case (RI') in the active position, the push piece (R2'), when the outlet valve (D4) is opened, being movable relative to the case (RI') and the support piece (R3') in the active position.

3. Distributor according to claim 1 or 2, wherein the support piece (R3') and the thrust piece (R2') are in mutual abutment in the position of rest with the spring (R4) relaxed, the support piece (R3') and the push piece (R2') in mutual buttock being movable relative to the case (RT) in the absence of a cartridge full of fluid product (C).

4. Distributor according to any one of the preceding claims, wherein the satellite (R5) is captive in the support piece (R3') with limited axial displacement and rotational displacement, the satellite (R5) selectively coming into stable contact with the case (RI') in active position.

5. Distributor according to any one of the preceding claims, wherein the support piece (R3') includes at least one rotating drive cam (R35) for stressing the rotating satellite.

6. Distributor according to any one of the preceding claims, wherein the case (RI') comprises at least one locking cam (R16) and one ejection cam (R18), the satellite (R5) comprising at least one lug (R54) which slides on the locking cams (R16) and ejection cams (RI8) under the action of the spring (R4) which acts on the satellite (R5) via the support piece (R3').

7. Distributor according to any one of the preceding claims, wherein the case (RI') forms an axial stop (R14), the satellite (R5) being forced against this axial stop (R14) by the support piece (R3').

8. Distributor according to any one of the preceding claims, wherein: - the housing (RI') comprises at least one locking cam (R16) and one ejection cam (R18) connected by a stop wall (R17), an axial stop (R14), and at least one axial channel (R15), - the support piece (R3') comprises an axial stroke limiting stop (R38) and at least one rotational drive cam (R35), - the satellite (R5) comprises at least one lug (R54) defining a sliding surface (R541), a stop ring (R52), and teeth (R53), the teeth (R53) engaging with the rotational drive cam (R35) to rotate the satellite (R5) during the compression phases of the spring (R4), the stop ring (R52) engaging with the axial stroke limiting stop (R38) during the spring (R4) relaxation phases,the lug (R54) moving in the axial chimney (R15) and between the locking (R16) and ejection (R18) cams and the axial stop (R14) under the stress of the support piece (R3'), the sliding surface (R541) coming into sliding contact on the cams of, The locking (R16) and ejection (R18) mechanism engages the lug in the active position, with the lug (R54) in contact with both the locking cam (R16) and the stop wall (R17). The rotating drive cam (R35) drives the satellite (R5) in rotation when the lug (R54) contacts the axial stop (R14). The lug (R54) is then moved axially within the axial channel (R15) by bearing against the support piece (R3') until it contacts the axial stop (R14). The lug (R54) is then rotated by the rotating drive cam (R35). When the support piece (R3') is released, the lug (R54) contacts the locking cam (R16), and the lug (R54) slides on the locking cam. (R16) until in contact with the stop wall (R17), marking the active position, the lug (R54) sliding against the stop wall (R17) by support on support piece (R3') until it comes into contact with the axial stop (R14),The lug (R54) is then rotated by the action of the rotating drive cam (R35), the lug (R54) coming into contact with the ejection cam (R18) when the support piece (R3') is released, the lug (R54) sliding on the ejection cam (R18) until it falls into another axial channel (R15). * * *

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