EP2509716B1 - Head for dispensing fluid material - Google Patents

Description

The present invention relates to a fluid dispenser head intended to be associated with or mounted on a fluid reservoir. The term "dispensing head" here means the complete assembly intended to be mounted on a reservoir to constitute a fluid dispenser. By actuation of this head, fluid is removed from the reservoir and dispensed through a dispensing orifice. Such dispensing heads are frequently used in the fields of perfumery, cosmetics or even pharmacy.

Conventionally, the dispensing head comprises a fluid dispenser member, such as a pump or a valve. The dispensing member generally comprises a body fixedly mounted relative to the reservoir and a valve stem movable axially back and forth relative to the body. The dispensing head also includes a pusher mounted on the valve stem and movable axially back and forth to drive the valve stem. For the outlet of the fluid product, the dispensing head also comprises a dispensing orifice connected to the valve stem. Thus, by pressing the pusher with one or more fingers, the valve stem is pushed into the body of the dispensing member, which has the effect of distributing fluid product from of the tank dosed or not.

In such a conventional dispensing head, the only possible movement of the pusher is a reciprocating axial displacement printed by the user who presses with the aid of one or more finger (s) on a thrust surface. formed by the pusher. The pusher being directly mounted on the valve stem, its displacement directly causes the displacement of the valve stem. In other words, the pusher and the valve stem are integral with each other and move together in one piece at the same time.

In the prior art, dispensing heads are already known which are provided with pushers displaceable in rotation with respect to their axis of displacement in order to perform a function of locking the pusher. Thus, the pusher can be rotated between a locked position in which it can not be moved axially and an unlocked operating position, in which the user can press the pusher and move it axially back and forth to distribute fluid product. However, the pusher still remains coupled directly to the valve stem so that they are forced to move axially together at the same time.

In the prior art, the document is also known FR-2 904 294 which describes a fluid dispenser head comprising a pump, a pusher provided with a dispensing orifice connected to the pump by a flexible conduit, and actuating means for driving the pusher in rotation and in axial displacement between a low axial position and a high axial position. An internal cam system makes it possible to transform the rotary displacement of the pusher into an axial displacement. To generate the actuation of the system, there is provided a rotary control ring that the user turns manually. The pusher is thus forced to move both axially and in rotation. Since the dispensing orifice is integral with the pusher, and the pump is fixed, the axial displacement of the pusher necessarily involves a plastic deformation of the flexible conduit which connects the orifice to the pump. In this dispensing head of the prior art, the dispensing orifice therefore moves axially with the pusher, not only when the head is actuated, but also when the pusher is rotated by means of rotation. actuating means. It has been observed empirically that the deformation of the flexible duct does not always take place as desired: indeed, it happens that the flexible duct is deformed in such a way that it forms a fold, thus preventing the fluid product from circulating to through. The flexible conduit crucially lacks flexibility and an acceptable solution to overcome this problem of flexibility is to achieve the flexible conduit overmolding. However, overmoulding requires a particular mold and considerably increases the cost price of the dispensing head.

Therefore, the present invention seeks to overcome the problems of the aforementioned prior art by defining a differently designed dispensing head, but still comprising a movable pusher by means of a rotary control ring and a cam system.

• un organe de distribution de produit fluide, tel qu'une pompe, comprenant un corps monté fixement par rapport au réservoir et une tige de soupape déplaçable axialement en va-et-vient,
• un embout de distribution monté rotatif sur la tige de soupape, l'embout étant relié à un gicleur par un conduit,
• un poussoir déplaçable manuellement axialement en va-et-vient pour déplacer l'embout de distribution et la tige de soupape, de manière à distribuer du produit fluide,
• une frette de commande rotative actionnable manuellement en rotation sans composante axiale pour déplacer axialement le poussoir entre une position de stockage et une position d'actionnement,
  la tête de distribution comprenant en outre :
• des moyens de guidage axial sans composante rotative pour guider le poussoir axialement sans tourner sur lui-même,
• des moyens de came rotatifs sans composante axiale entraînés en rotation par la frette de commande, le poussoir étant en prise avec ces moyens de came pour solliciter le poussoir en déplacement axial sans composante rotative.

To do this, the present invention proposes a fluid dispenser head intended to be mounted on a fluid reservoir to form a dispenser, the head comprising:

• a fluid dispenser member, such as a pump, comprising a body fixedly mounted with respect to the reservoir and an axially reciprocable valve stem,
• a dispensing nozzle rotatably mounted on the valve stem, the nozzle being connected to a nozzle by a conduit,
• a pusher manually displaceable axially back and forth to move the dispensing nozzle and the valve stem, so as to dispense fluid product,
• a rotary control hoop manually operable in rotation without axial component for axially moving the pusher between a storage position and an actuating position,
  the dispensing head further comprising:
• axial guiding means without a rotary component for guiding the pusher axially without turning on itself,
• rotary cam means without axial component driven in rotation by the control ring, the pusher being engaged with these cam means for biasing the pusher in axial displacement without rotating component.

Unlike the aforementioned document of the prior art, the pusher of the dispensing head is not rotated by the control ring: it performs only an axial displacement, without rotating component. In other words, the pusher does not rotate relative to the tank. The pusher can therefore be oriented and indexed relative to the reservoir: this is particularly advantageous when the visible top of the pusher has an inscription, such as a logo, which will always be well disposed with respect to the tank. The rotary control ring certainly drives the tip and the cam means, but not the pusher, which is locked in rotation by the axial guide means. The dispensing head of the invention retains a global configuration substantially similar to that of the document of the prior art FR-2 904 294 due to the rotary control ring: however, the pusher remains static in rotation and the cam means rotate.

According to a particular embodiment, the nozzle is integral in rotation, and advantageously also in axial displacement, of the control ring. Advantageously, the dispensing nozzle is rotated by the nozzle, which is itself driven in rotation by the control ring. Preferably, the conduit is flexible to allow manual axial movement of the pusher during the dispensing of fluid product. Advantageously, the cam means are rotated, advantageously by the duct. Alternatively, the conduit may be rigid, the cam means and the dispensing nozzle can then be integrally molded.

According to another aspect of the invention, the pusher comprises at least one axial guide pin engaged with the axial guide means and at least one cam pin engaged with the cam means. Advantageously, the pusher comprises a substantially cylindrical skirt defining an inner wall and an outer wall, the guide pin being disposed on the outer wall and the cam pin being disposed on the inner wall, or vice versa.

According to another characteristic of the invention, the axial guiding means are formed by a guide sleeve which is fixedly engaged around the dispensing member. Advantageously, the guide sleeve comprises a radial window in which the nozzle moves when actuating the control collar. Preferably, the pusher abuts on the guide sleeve in the storage position.

According to an advantageous embodiment of the invention, the cam means are formed by a cam ring engaged around the dispensing nozzle and inside the pusher. Advantageously, the cam ring comprises a drive slot in which the conduit is engaged.

In summary, the control ring rotates on itself on the fixed guide sleeve which blocks the pusher in rotation, but which guides it axially. On the other hand, the control ring drives the nozzle in rotation, which in turn drives the dispensing nozzle and the cam means in rotation. The result of the mutual movements of the constituent elements of the dispensing head is that the pusher moves only axially with the nozzle integral with the rotary control hoop. The conduit connecting the nozzle to the jet needs only a relative flexibility since the nozzle rotates with the nozzle. The flexibility of the conduit is used only during the dispensing of fluid product by manual depression of the pusher. Indeed, the nozzle remains fixed on the hoop, while the tip is moved axially.

It should be noted that the dispensing head of the invention implements only a minimum of parts, namely five parts, if one omits the pump.

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

• La figure 1 est une vue éclatée en perspective d'un distributeur de produit fluide selon un mode de réalisation non limitatif de l'invention,
• La figure 2 est une vue éclatée en perspective agrandie de la tête de distribution de produit fluide de la figure 1,
• La figure 3 est une vue en coupe transversale verticale à travers le distributeur à l'état monté des figures 1 et 2 en position de stockage inopérante,
• La figure 4 est une vue en coupe transversale verticale du distributeur des figures 1 et 2 en position d'actionnement opérante.

In the figures:

• The figure 1 is an exploded perspective view of a fluid dispenser according to a non-limiting embodiment of the invention,
• The figure 2 is an exploded perspective view enlarged of the fluid dispensing head of the figure 1 ,
• The figure 3 is a vertical cross-sectional view through the distributor in the assembled state of figures 1 and 2 in inoperative storage position,
• The figure 4 is a vertical cross-sectional view of the distributor of the figures 1 and 2 in operative operating position.

We will first refer to the figure 1 to explain in detail the structure of the various constituent elements of the dispensing head according to the invention.

The dispensing head is intended to be associated with a fluid reservoir 1 which defines a body 10 and a neck 11. The body 10 delimits a useful volume which is that of the reservoir. The neck 11 defines an opening that communicates the interior of the body 10 with the outside. The neck 11 advantageously forms a projecting outer peripheral rim which defines a shoulder 12 facing downwards. This shoulder 12 will serve to hook the dispensing head on the reservoir. In this particular embodiment of the invention, the reservoir is of revolution, but other forms can be envisaged.

The dispensing head, according to this particular embodiment, comprises six distinct constituent elements, namely a dispensing member 2, a guide sleeve 3, a dispensing nozzle 4, a cam ring 5, a pusher 6, 7 and a rotary control hoop 8. All these constituent elements can be made by injection / molding of suitable plastic material. Certain constituent elements may also be made of metal, such as for example the rotary control member or the pusher.

The dispensing member 2 may be a pump or a valve comprising a body 20 defining a low inlet optionally provided with a dip tube. The pump or valve also includes a valve or actuating rod 21 which is axially movable back and forth within the body. Conventionally, the valve stem 21 defines an internal fluid delivery pipe which is in selective communication via an outlet valve with the interior of the body 20. The pump or valve may also be equipped with a fixing ring 22 provided with hooking lugs intended to engage below the shoulder 12 of the neck 11. The fixing ring 22 is here presented as a constituent element of the dispenser member. However, the fixing ring can also be in the form a separate element of the dispensing member which is attached to the dispenser member. However, it has been considered here that the fixing ring is an integral part of the dispenser member. This is a quite classic design for a pump or a valve in the fields of perfumery, cosmetics or even pharmacy. By pressing on the valve stem 21, the outlet valve (not shown) opens and the fluid stored in the body 20 can flow outwardly through the rod 21.

The guide sleeve 3 is fixedly mounted on the dispensing member 2, and preferably definitively. Consequently, the guide sleeve 3 is stationary, both axially and in rotation with respect to the reservoir 1. The guide sleeve 3 fulfills several distinct technical functions, as will be seen below, once the other constituent elements of the dispensing head will have been described. For the moment, the fixing sleeve 3 will be described in its structure. The guide sleeve 3 can be made by injection molding plastic material, like most other components of the dispensing head. The sleeve has a generally cylindrical general configuration of circular section, so that it defines a hollow interior. The sleeve is open on both ends. In its lower part, the sleeve comprises a double wall separated by a hollow annular. The inner wall 32 serves as a locking skirt for the fixing ring 22 engaged around the neck of the reservoir. As can be seen on the Figures 3 and 4 , the locking skirt 32 is engaged around the fixing ring 22, thus preventing the skirt 22 from disengaging from below the shoulder 12 formed by the neck 11. The outer wall which extends concentrically around the locking skirt 32 forms one or more flexible hooking tabs 38 intended to cooperate with the rotary control ring 8, as will be seen hereinafter. In its upper part, the guide sleeve 3 forms an axial vertical notch 35 which opens on the upper end of the sleeve. At its lower end, the indentation 35 is connected to a radial window 34 which extends over a portion of the periphery of the sleeve. The window 34 may for example extend over the quarter or the third from the periphery of the sleeve. Thus, the window 34 communicates with the upper end of the sleeve by the vertical notch 35. On the other hand, the inner wall of the guide sleeve 3, at its upper part, forms axial guiding means 36, in particular in the form of vertical grooves dug in the inner wall of the sleeve and opening on the upper end of the sleeve. The grooves are partially visible on the figure 2 . The bottom of the grooves is located about a quarter of the height of the sleeve starting from the top.

The dispensing nozzle 4 can be made in one piece, but preferably it is made in two pieces, as visible on the figure 2 . The dispensing nozzle 4 firstly comprises a cap 42 connected to a nozzle holder 44 via a conduit 43, which advantageously has a certain flexibility. The tip 4 also comprises a nozzle 45 engaged in the nozzle holder 44 and forming a dispensing orifice 46. The cap 42 is intended to be mounted on the free end of the valve stem 21 of the dispensing member 2. Thus, the fluid product from the rod 21 reaches the dispensing orifice 46 by passing through the cap 42, the duct 43 and the nozzle 45. In the mounted state, as shown in FIGS. figure 3 and 4 , the cap 42 caps the valve stem 21 and the duct 43 extends radially outwardly. The nozzle holder 44 is engaged in the radial window 34 and can move along the length of the window as will be seen hereinafter. To engage the nozzle holder 44 in the radial window 34, it is introduced through the axial notch 35. It can even be seen on the figure 4 that the nozzle holder 44 projects outwardly beyond the radial window 34.

The cam ring is a substantially cylindrical piece that can be full. The ring is however open at its lower end so as to define a housing 52 for the cap 42. The cam ring defines on its outer wall one or more cam means 56, which are in the form of inclined hollow cam paths or helical. For example, three cam paths may be provided around the cam ring 5. It may also be noted that the cam ring 5 defines a drive slot 54 which is arranged vertically and open on the lower end of the ring. This drive slot 54 is intended to receive the conduit 43 of the dispensing nozzle 4, as can be seen on the figure 4 . Thus, when the nozzle holder 44 is moved in the radial window 34, the duct 34 drives the cam ring 5 in rotation. In the assembled state, as shown in Figures 3 and 4 , the cam ring 5 is engaged inside the guide sleeve 3, with the cap 42 engaged inside the housing 52 of the ring.

The pusher here is made in two pieces, but it can also be made in one piece. However, in the embodiment of the figures, the pusher comprises a push body 6 and a push cover 7. The body 6 can be made of plastic, while the cover 7 can be made of metal. The pusher body 6 has a generally cylindrical configuration with an open lower end and an upper end which can be opened. The pusher body 6 thus defines a substantially cylindrical skirt 61 comprising an outer wall and an inner wall. On the outer wall, there are several guide lugs 63 which protrude radially outwards. These guide lugs are slidably engaged within the axial guide grooves 36 of the guide sleeve 3, as can be seen in FIGS. Figures 3 and 4 . On the inner wall of the skirt 61, there are also provided cam pins 65 which project radially inwards. These pins 65 are visible on the Figures 3 and 4 . It can be seen that the pins 65 are engaged within the cam paths 56 formed by the cam ring 5. The casing 7 is simply in the form of a bucket which is engaged around the skirt 61 of the body 6. Thus, the pusher 6,7 is engaged with the guide sleeve 3 by the engagement of the guide pins 63 in the guide grooves 36, and also cooperates with the cam ring 5 by the engagement of the cam pins 65 in the cam tracks 56. The pusher is thus constrained to move axially only within the guide sleeve 3, the axial displacement being generated by the displacement of the cam pins 65 in the inclined cam paths 56.

As for the rotary control ring 8, it defines a substantially cylindrical casing 82 which is partially closed at its upper end by a disc 81, leaving an opening 86 remaining. On the other hand, the casing 82 comprises a jet hole 84 The control ring 8 is engaged around the guide sleeve 3, but can be moved in rotation about the sleeve 3 over a certain angle, which may for example be of the order of 90 °. To do this, the hoop 8 can form one or more radial recesses 83 which will cooperate by snapping with the latching lugs 38 of the sleeve 3. Thus, the control ring 8 can rotate around the sleeve 3 in a limited manner, but not can not be removed from the sleeve 3, since blocked by the engagement of the tabs 38 in the recesses 83. Referring to the Figures 3 and 4 it can be seen that the pusher 6,7 extends through the opening 86 of the disk 81. It should also be noted that the nozzle holder 44 with its nozzle 45 are engaged in the hole 84, and are integral with it , so that the nozzle holder and its nozzle are rotated when the control ring 8 is rotated.

Referring now more specifically to Figures 3 and 4 a complete operating cycle will be described to understand the interactions and mutual displacements of the different components of the head. On the figure 3 it can be seen that the top of the covering 7 is arranged in the same plane as the disc 81. The pusher is therefore entirely housed inside the control ring 8. In this position, it is not even possible to actuate the pusher, since the guide pins 63 rest at the bottom of the guide grooves 36. Alternatively or additionally, the lower edge of the pusher can abut on a step of the sleeve. The cam ring 5 is fully engaged inside the pusher 6,7, the cam pins 65 being arranged at the lowest level of the cam tracks 56. Although not shown, the nozzle 45 is disposed at one end. of the radial window 34.

Starting from this inoperative storage position, the user can hold the tank with one hand and turn the control ring 8 with the other hand. It is also possible to grip the tank and rotate the band with one hand. The rotary displacement of the hoop 8 will cause the axial displacement and / or rotary of certain elements of the head. More specifically, the nozzle and its nozzle door are integral with the control ring 8, since fixedly engaged inside the hole 84. The nozzle and its nozzle holder will be driven in rotation, thereby causing the rotation of the conduit 43 and the cap 42 around or on the valve stem 21. On the other hand, since the cam ring 5 is rotationally integral with the dispensing nozzle 4 due to the engagement of the conduit 43 in the slot axial 54, the cam ring 5 will also be rotated. We recall that the guide sleeve 3 is fixedly engaged, that is to say without axial or rotary displacement, on the dispensing member 2. On the other hand, the pusher is locked in rotation in the sleeve 3 because the engagement of the guide pins 63 in the guide grooves 36. On the other hand, the pusher is forced to move axially under the effect of the rotation of the cam ring 5, since the cam pins 65 are engaged in the inclined cam paths 56. The mutual interactions of the various components of the head have the ultimate effect of moving the pusher only axially without any rotary component. This is clearly visible by comparing the Figures 3 and 4 where it can clearly be seen that in the operative position of actuating the figure 4 the pusher protrudes out of the control ring 8, so that it can be manually depressed by the user to dispense fluid product. The force of the finger of the user exerted on the pusher is transmitted on the actuating rod 21 via the cam ring 5 inside which is housed the cap 42 engaged on the rod 21.

• organe de distribution 2 : statique en déplacement axial / rotatif par rapport au réservoir,
• manchon de guidage 3 : statique en déplacement axial / rotatif par rapport au réservoir,
• embout de distribution 4 : rotatif sans composante axiale (hormis actionnement) par rapport au réservoir,
• couronne de came 5 : rotatif sans composante axiale (hormis actionnement) par rapport au réservoir,
• poussoir 6, 7 : axial, mais pas en rotation, par rapport au réservoir 1, et
• frette de commande rotative 8 : rotatif sans composante axiale par rapport au réservoir,

To better understand the dynamic behavior of the different components of the distribution head, we will now list for each element its displacement capabilities:

• distribution member 2: static in axial / rotary displacement with respect to the reservoir,
• guide sleeve 3: static in axial / rotary displacement with respect to the reservoir,
• dispensing nozzle 4: rotary without axial component (except actuation) with respect to the reservoir,
• cam ring 5: rotary without axial component (except actuation) with respect to the reservoir,
• pusher 6, 7: axial, but not rotating, relative to the tank 1, and
• rotary control ring 8: rotary without axial component with respect to the reservoir,

In other words, the dispensing member 2 and the sleeve 3 are perfectly integral with each other and static with respect to the reservoir; the tip 4 and the ring 5 are perfectly integral with each other and rotate relative to the tank without axial component except during the manual actuation of the pusher; the control ring 8 and the nozzle 45 rotate relative to the reservoir without any axial component; the pusher 6, 7 moves (only) axially without rotating component.

• Le réservoir, le manchon de guidage, le poussoir et/ou la frette de commande peuvent présenter une section autre que cylindrique circulaire. Par exemple, lorsque le poussoir n'est pas circulaire au niveau de sa jupe 61, on peut se passer des ergots de guidage 63, étant donné que le poussoir sera empêché de tourner dans le manchon de guidage du seul fait de sa forme. Le poussoir est alors plus facile à mouler. L'ouverture 86 de la frette doit présenter une forme et/ou une dimension qui n'entraîne pas le poussoir en rotation.
• Le conduit 43 n'est pas nécessairement souple. En effet, il peut être rigide, mais il faut alors prévoir un trou de gicleur 84 de forme oblongue pour que le gicleur et son porte gicleur puissent coulisser axialement dans le trou oblong lors de l'actionnement manuel du poussoir. Le gicleur et son porte gicleur sont toutefois toujours solidaires de la frette en rotation. Dans ce cas, il est même possible de mouler de manière monobloc l'embout 4 et la couronne de came 5, avec ou sans gicleur rapporté. On élimine ainsi un élément constitutif.

• Le manchon de guidage 3 ne participe pas nécessairement à la fixation de l'organe de distribution sur le col du réservoir.
• L'embout de distribution 4 peut être moulé en deux, voire trois pièces séparées : le capuchon, le conduit et le porte gicleur.

Without departing from the scope of the invention, the following variants can be envisaged:

• The reservoir, the guide sleeve, the pusher and / or the control ring may have a section other than circular cylindrical. For example, when the pusher is not circular at its skirt 61, one can dispense with the guide pins 63, since the pusher will be prevented from rotating in the guide sleeve simply because of its shape. The pusher is then easier to mold. The opening 86 of the hoop must have a shape and / or a dimension that does not cause the pusher to rotate.
• The conduit 43 is not necessarily flexible. Indeed, it can be rigid, but it is then necessary to provide a nozzle hole 84 of form oblong so that the nozzle and its nozzle door can slide axially in the oblong hole during manual actuation of the pusher. The nozzle and its nozzle door are however still integral with the rotating hoop. In this case, it is even possible to integrally mold the tip 4 and the cam ring 5, with or without nozzle attached. This eliminates a constituent element.

• The guide sleeve 3 does not necessarily participate in the attachment of the dispensing member on the neck of the reservoir.
• The dispensing nozzle 4 can be molded in two or even three separate parts: the cap, the duct and the nozzle holder.

Thanks to the dispensing head of the invention, it is possible to move the pusher between an inoperative low storage position and an operative high operating position without rotating it with the control ring. In addition, the nozzle is completely fixed during fluid dispensing, since mounted on the hoop, which is fixed when the user manually actuates the pusher.

Claims (13)

1. A fluid dispenser head for mounting on a fluid reservoir (1) so as to constitute a dispenser, the head comprising:

   • a fluid dispenser member (2), such as a pump, comprising a body (20) that is mounted in stationary manner relative to the reservoir (1), and a valve rod (21) that is axially movable down and up;

   • a dispenser endpiece (4) that is mounted to turn on the valve rod (21), the endpiece being connected to a nozzle (45) via a duct (43);

   • a pusher (6, 7) that is manually and axially movable down and up so as to move the dispenser endpiece (4) and the valve rod (21), in such a manner as to dispense fluid; and

   • a rotary control hoop (8) that is actuated manually in turning, without any axial component, so as to move the pusher (6, 7) axially between a storage position and an actuatable position;
   the dispenser head being characterized in that it further comprises:

   • axial guide means (36), without any turning component, for guiding the pusher (6, 7) axially without turning about its own axis; and

   • rotary cam means (56), without any axial component, that are turned by the control hoop (8), the pusher (6, 7) being in engagement with the cam means (56) so as to urge the pusher in axial movement, without any turning component.
2. A dispenser head according to claim 1, wherein the nozzle (45) is constrained to turn with the control hoop (8).
3. A dispenser head according to claim 1 or claim 2, wherein the dispenser endpiece (4) is turned by the nozzle (45) that is itself turned by the control hoop (8).
4. A dispenser head according to claim 1, 2, or 3, wherein the nozzle (45) is constrained to turn with the control hoop (8) and to move axially, the duct (43) being flexible so as to enable the pusher to be moved manually and axially while fluid is being dispensed.
5. A dispenser head according to claim 1, 2, or 3, wherein the duct (43) is rigid, the cam means (56) and the dispenser endpiece (4) advantageously being molded as a single piece.
6. A dispenser head according to claim 4, wherein the cam means (56) are turned, advantageously by the duct (43).
7. A dispenser head according to any preceding claim, wherein the pusher (6, 7) includes at least one axial guide lug (63) in engagement with the axial guide means (36), and at least one cam pin (65) in engagement with the cam means (56).
8. A dispenser head according to claim 7, wherein the pusher (6, 7) includes a skirt (61) that is substantially cylindrical and that defines an inside wall and an outside wall, the guide lug (63) being arranged on the outside wall, and the cam pin (65) being arranged on the inside wall, or vice versa.
9. A dispenser head according to any preceding claim, wherein the axial guide means (36) are formed by a guide sleeve (3) that is engaged in stationary manner around the dispenser member (2).
10. A dispenser head according to claim 9, wherein the guide sleeve (3) includes a radial slot (34) in which the nozzle (45) moves while the control hoop (8) is being actuated.
11. A dispenser head according to claim 9 or claim 10, wherein the pusher (6, 7) is in abutment against the guide sleeve (3) in the storage position.
12. A dispenser head according to any preceding claim, wherein the cam means (56) are formed by a cam cylinder (5) that is engaged around the dispenser endpiece (4) and inside the pusher (6, 7).
13. A dispenser head according to claim 12, wherein the cam cylinder (5) includes a drive slot (54) in which the duct (43) is engaged.

Images