EP2539078B1 - Dispensing head for a fluid and dispenser comprising such a dispensing head - Google Patents

Dispensing head for a fluid and dispenser comprising such a dispensing head Download PDF

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Publication number
EP2539078B1
EP2539078B1 EP11712613.6A EP11712613A EP2539078B1 EP 2539078 B1 EP2539078 B1 EP 2539078B1 EP 11712613 A EP11712613 A EP 11712613A EP 2539078 B1 EP2539078 B1 EP 2539078B1
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EP
European Patent Office
Prior art keywords
spring
resilient member
dispenser
fluid
contact points
Prior art date
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EP11712613.6A
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German (de)
French (fr)
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EP2539078A1 (en
Inventor
Jean-Marc Pardonge
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Aptar France SAS
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Aptar France SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/48—Lift valves, e.g. operated by push action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • B05B11/1018—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element and the controlling element cooperating with means for opening or closing the inlet valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1077—Springs characterised by a particular shape or material

Definitions

  • the present invention relates fluid product dispensing member and a fluid product dispensing device comprising such a dispensing member.
  • Fluid dispensing members are well known, in particular for selectively dispensing fluid products, such as liquids or powders, especially in the field of pharmacy, perfumery and cosmetics. These fluid dispensing members may be for example pumps, valves or air flushes. They are generally associated with a reservoir containing the fluid product to form a fluid dispensing device.
  • a fluid product dispensing member comprises a body and dispensing means which are moved in said body manually by the user between a rest position and a dispensing position, said displacement permitting the dispensing of the fluid product.
  • An elastic member such as a spring, is generally used to urge said dispensing means to their rest position, so that the user must exert a force to effect the displacement towards the dispensing position, and when releasing this effort, said elastic member automatically returns the dispensing means in their rest position.
  • metal spiral springs are used as return springs. This can present a number of disadvantages.
  • the metallic material can interact with the fluid product, especially when it is a pharmaceutical product, which can have a detrimental effect on said fluid product to be dispensed.
  • the elastic properties of the spiral springs are not always optimal, which requires having springs of a size large enough to ensure safe and reliable operation of the dispensing member. In some applications, it may be desirable to reduce the dimensions of said elastic member.
  • the spiral springs which consist of a plurality of turns in series behind one another, do not exhibit an optimum resistance to stress creep.
  • a metal spring is generally formed by deformation of a strip or continuous coil, so that the end portions of the springs are never perfectly flat with an axial distribution of the elastic deformation stress which is not homogeneous.
  • a malfunction on one of the series turns can generate a strong loss of performance of the spiral spring, which can also be a disadvantage especially in devices for dispensing a large number of doses and therefore intended to be operated a large number of times. number of times.
  • the documents EP-1 477 234 and EP-1,565,270 describe plastic springs having deformable rings interconnected by rigid axial material bridges.
  • EP-1 477 234 discloses a dispensing member according to the preamble of claim 1.
  • the present invention aims to provide a fluid dispenser member and a fluid dispenser device comprising such a member, which do not reproduce the aforementioned drawbacks.
  • the present invention aims to provide a fluid dispenser member that decreases or eliminates the risk of harmful interaction between the fluid and the constituent parts of said dispensing member.
  • Another object of the present invention is to provide such a fluid dispenser member which makes it possible to achieve optimum elasticity properties with a minimum space requirement.
  • the present invention also aims to provide such a fluid dispenser member which has improved properties of stress creep resistance.
  • the present invention also aims to provide such a fluid dispenser member that allows a wide range of load control and deformation depending on the type of device in which it is used.
  • the present invention also aims to provide such a fluid dispenser member which is simple and inexpensive to manufacture and assemble, and safe and reliable use.
  • the present invention therefore relates to a fluid dispenser member according to claim 1.
  • the upper corrugated ring of a level of elasticity forms the lower corrugated ring of the elasticity level disposed directly above, and the lower corrugated ring of said elasticity level forms the upper corrugated ring of the level. of elasticity arranged directly below.
  • the contact points of a level of elasticity are offset relative to the contact points of the elasticity levels directly above and directly below, a point of contact of the elasticity level being disposed in the middle of the elasticity level. two points of contact of the level of elasticity directly above and in the middle of two points of contact of the level of elasticity directly below.
  • said synthetic material is loaded with reinforcing materials and / or creep resistance, such as glass fibers and / or carbon nanotubes.
  • said fluid product is a liquid or powdery medicine.
  • said dispensing member is a pump or a valve, said dispensing means being the pump piston or the valve valve, and said resilient member forming the return spring of said pump or valve.
  • said dispensing member is a flush of compressed air, said dispensing means being the plunger of the air flush, and said resilient member forming the return spring of said flush.
  • the present invention also relates to a fluid dispenser device, comprising a reservoir containing said fluid product, and comprising a dispensing member as described above.
  • the fluid dispenser member 10 is a pump comprising a pump body 11 in which slides a piston 20 forming dispensing means manually actuated.
  • This piston 20 when moved in said body 11 towards its dispensing position, will expel a dose of fluid product through a dispensing orifice 12 of the pump, the latter being generally connected to a dispensing head (not shown ) which comprises the spray orifice through which the fluid product will be permanently distributed to the user.
  • the piston 20 is urged by an elastic member 100 towards its rest position and when the user manually actuates the pump, he pushes the piston 20 inside the pump body 11 by compressing the elastic member 100.
  • the compressed elastic member 100 automatically returns the piston 20 of the pump 10 to its rest position, which is that represented on the figure 1 .
  • the pump shown on the figure 1 is a pump of a particular type, and it is understood that the present invention is not limited to this particular pump, but that any type of pump may be concerned.
  • a valve could also be used as a fluid dispenser member according to the present invention. In this case, it is not a piston but a valve valve that moves against the force of the elastic member within a suitable valve body.
  • the figure 2 represents another alternative embodiment of a fluid dispenser member 10 according to the present invention.
  • the fluid dispenser member 10 is an air flush, comprising a body 11 in which a piston 20 moves for compress air and thus create a flush of compressed air.
  • This compressed air will dispense a dose of fluid, usually powder, disposed downstream of said flush.
  • the air discharge piston 20 When the user presses on the air discharge piston 20, he will compress the elastic member 100 and the air contained inside the air flushing body 11, until this compressed air is dispensed, for example from a given compression threshold or from a mechanical opening of a suitable orifice 12.
  • the user releases his actuating force on the air flushing piston 20, that it is automatically returned to its rest position by the elastic member 100 compressed.
  • the user can then change the fluid cartridge, or the like, of the fluid dispensing device with which the flush is associated, to dispense the next dose.
  • the figure 2 represents only one particular embodiment, and the present invention is obviously not limited by this variant as shown.
  • the elastic member 100 has a particular structure very different from a spiral spring usually used in this type of device.
  • the figure 3 is a schematic perspective view of an advantageous embodiment of the elastic member 100.
  • the latter comprises a plurality of elastic cells C which are arranged in parallel around the longitudinal axis X of the elastic member 100.
  • plurality of elastic cells C in parallel forms a level of elasticity N.
  • the elastic member 100 comprises a plurality of elasticity levels, in this case the N-2, N-1, N, N + 1, N + 2 and N + 3 on the figure 3 .
  • a different number of levels of elasticity can be used. These levels of elasticity are superimposed on each other along said longitudinal axis X.
  • the level of elasticity N comprises an upper corrugated ring 110 with multiple corrugations and a lower corrugated ring 120 also with multiple corrugations.
  • These upper and lower corrugated rings 110, 120 are arranged in such a way that they touch each other at several points of contact P which are distributed around said axis X.
  • a hollow of the upper corrugated ring will come into contact with a top of the lower corrugated ring to form a contact point P.
  • it will be formed a elastic cell C, and thus a plurality of elastic cells C are distributed around the periphery of said level of elasticity N.
  • each level of elasticity comprises the same number of elastic cells C and contact points P.
  • the contact points of the elasticity level N are offset with respect to the contact points of the levels of elasticity. elasticity directly above N + 1 and directly below N-1, with a point of contact of the level of elasticity N which is arranged in the middle of two points of contact of the level of elasticity directly above N + 1 and in the middle of two points of contact of the level of elasticity directly below N-1.
  • the points of contact of a level of elasticity form the vertices of the elastic cells of the levels of elasticity directly above and below, and vice versa.
  • the upper and lower axial edges of the elastic member 100 are formed by completely flat rings 130, 140.
  • the first levels of elasticity from the top and the bottom of the elastic member 100 are not complete elasticity levels since their elastic cells C are not formed by two corrugated rings but only by a corrugated ring associated with a flat ring.
  • the elastic member 100 has six complete levels of elasticity, plus the two partial levels defined by the upper axial edges 130 and lower 140.
  • This multilevel multi-cell structure in parallel is particularly advantageous.
  • it makes it possible to produce elastic members with small dimensions. Indeed, compared to a spring Conventional spiral, the same compression force can be obtained by the elastic member of the present invention for about a footprint corresponding to 50% of the axial space.
  • the elastic member of the present invention is therefore particularly suitable for small deformation strokes, for example up to about 20 mm deformation, which are characteristic of pumps or valves used in the pharmaceutical industry.
  • the elastic member 100 of the present invention has improved characteristics of stress creep resistance, because it consists of several series of cells arranged in parallel, in contrast to the spiral springs which consist of cells or turns arranged only serial.
  • the elastic deformation is distributed substantially homogeneously or uniformly over the whole of each cell, which promotes the service life and the constancy of performance of the spring over time, eliminating the highly stressed local areas with each actuation.
  • This is further reinforced by the perfectly flat upper and lower rings, which distribute the axial deformation force uniformly over all the cells of the spring.
  • the present invention therefore applies particularly to fluid dispensing devices of the pharmaceutical field, and in particular for dispensing liquid or powder-form drugs by means of pumps, valves, powder inhalers, single dose, etc.
  • the elastic member 100 is made of synthetic material, in particular by injection or molding. This avoids in particular the risk of harmful interaction between the elastic member and the fluid to be dispensed.
  • the elastic member 100 may be made of polyoxymethylene (POM).
  • POM polyoxymethylene
  • the synthetic material can be loaded with one or a plurality of materials that enhance elasticity and / or creep resistance, such as glass fibers or carbon nanotubes.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Springs (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

A fluid dispenser member having a body and manually-actuated dispenser mechanism movable in the body between rest and dispensing positions. The dispenser mechanism urged by a resilient member towards the rest position by a plurality of spring cells arranged in parallel around a longitudinal axis of the resilient member, forming a spring stage. The resilient member includes a plurality of spring stages that are superposed along the longitudinal axis. A spring stage has a top undulating ring having multiple undulations, and a bottom undulating ring having multiple undulations, the top and bottom undulations arranged relative to each other so that the top and bottom undulating rings are in contact at a plurality of contact points distributed around the longitudinal axis. A spring cell is defined between two adjacent contact points of the spring stage, the resilient member is made of a synthetic material.

Description

La présente invention concerne organe de distribution de produit fluide et un dispositif de distribution de produit fluide comportant un tel organe de distribution.The present invention relates fluid product dispensing member and a fluid product dispensing device comprising such a dispensing member.

Les organes de distribution de produit fluide sont bien connus, notamment pour distribuer de manière sélective des produits fluides, tels que des liquides ou des poudres, notamment dans le domaine de la pharmacie, de la parfumerie et de la cosmétique. Ces organes de distribution de produit fluide peuvent être par exemple des pompes, des valves ou des chasses d'air. Ils sont généralement associés à un réservoir contenant le produit fluide pour former un dispositif de distribution de produit fluide. De manière classique, un organe de distribution de produit fluide comporte un corps et des moyens de distribution qui sont déplacés dans ledit corps manuellement par l'utilisateur entre une position de repos et une position de distribution, ledit déplacement permettant la distribution du produit fluide. Un organe élastique, tel qu'un ressort, est généralement utilisé pour solliciter lesdits moyens de distribution vers leur position de repos, de sorte que l'utilisateur doit exercer un effort pour réaliser le déplacement vers la position de distribution, et lorsqu'il relâche cet effort, ledit organe élastique ramène automatiquement les moyens de distribution dans leur position de repos. Généralement, des ressorts à spirale en métal sont utilisés en tant que ressorts de rappel. Ceci peut présenter un certain nombre d'inconvénients. Ainsi, le matériau métallique peut interagir avec le produit fluide, notamment lorsqu'il s'agit d'un produit pharmaceutique, ce qui peut avoir un effet néfaste sur ledit produit fluide à distribuer. Par ailleurs, les propriétés élastiques des ressorts à spirale ne sont pas toujours pas optimales, ce qui nécessite d'avoir des ressorts d'une dimension suffisamment grande pour garantir un fonctionnement sûr et fiable de l'organe de distribution. Or, dans certaines applications, il peut être souhaitable de diminuer les dimensions dudit organe élastique. De plus, les ressorts à spirale, qui sont constitués d'une pluralité de spires en série les unes derrière les autres, ne présentent pas une tenue optimale au fluage sous contrainte. De plus, un ressort métallique est généralement réalisé par déformation d'un feuillard ou boudin continu, de sorte que les parties d'extrémités des ressorts ne sont jamais parfaitement plats avec donc une répartition axiale de la contrainte de déformation élastique qui n'est pas homogène. De même, un dysfonctionnement sur une des spires en série peut générer une forte perte de performance du ressort à spirale, ce qui peut également être un inconvénient notamment dans les dispositifs destinés à distribuer un grand nombre de doses et donc destinés à être actionnés un grand nombre de fois. Les documents EP-1 477 234 et EP-1 565 270 décrivent des ressorts plastiques comportant des anneaux déformables reliés entre eux par des ponts de matière axiaux rigides. Lors de la déformation élastique, il se crée donc des contraintes très variables avec des parties fortement contraintes au niveau des parties d'anneau déformées, et des parties faiblement contraintes, au niveau des ponts rigides. La résilience de ce type de ressort n'est donc pas assurée dans le temps. De plus, la capacité de déformation de ce type de ressort n'est pas optimale, en raison des ponts de matière rigide.Fluid dispensing members are well known, in particular for selectively dispensing fluid products, such as liquids or powders, especially in the field of pharmacy, perfumery and cosmetics. These fluid dispensing members may be for example pumps, valves or air flushes. They are generally associated with a reservoir containing the fluid product to form a fluid dispensing device. In a conventional manner, a fluid product dispensing member comprises a body and dispensing means which are moved in said body manually by the user between a rest position and a dispensing position, said displacement permitting the dispensing of the fluid product. An elastic member, such as a spring, is generally used to urge said dispensing means to their rest position, so that the user must exert a force to effect the displacement towards the dispensing position, and when releasing this effort, said elastic member automatically returns the dispensing means in their rest position. Generally, metal spiral springs are used as return springs. This can present a number of disadvantages. Thus, the metallic material can interact with the fluid product, especially when it is a pharmaceutical product, which can have a detrimental effect on said fluid product to be dispensed. Furthermore, the elastic properties of the spiral springs are not always optimal, which requires having springs of a size large enough to ensure safe and reliable operation of the dispensing member. In some applications, it may be desirable to reduce the dimensions of said elastic member. In addition, the spiral springs, which consist of a plurality of turns in series behind one another, do not exhibit an optimum resistance to stress creep. In addition, a metal spring is generally formed by deformation of a strip or continuous coil, so that the end portions of the springs are never perfectly flat with an axial distribution of the elastic deformation stress which is not homogeneous. Similarly, a malfunction on one of the series turns can generate a strong loss of performance of the spiral spring, which can also be a disadvantage especially in devices for dispensing a large number of doses and therefore intended to be operated a large number of times. number of times. The documents EP-1 477 234 and EP-1,565,270 describe plastic springs having deformable rings interconnected by rigid axial material bridges. During elastic deformation, therefore, very variable stresses are created with strongly constrained portions at the deformed ring portions, and weakly constrained portions at the rigid bridges. The resilience of this type of spring is therefore not assured over time. In addition, the deformation capacity of this type of spring is not optimal, because of rigid material bridges.

Le document EP-1 477 234 décrit un organe de distribution selon le préambule de la revendication 1.The document EP-1 477 234 discloses a dispensing member according to the preamble of claim 1.

La présente invention a pour but de fournir un organe de distribution de produit fluide et un dispositif de distribution de produit fluide comportant un tel organe, qui ne reproduisent pas les inconvénients susmentionnés.The present invention aims to provide a fluid dispenser member and a fluid dispenser device comprising such a member, which do not reproduce the aforementioned drawbacks.

En particulier, la présente invention a pour but de fourni un organe de distribution de produit fluide qui diminue voire élimine les risques d'interaction néfastes entre le produit fluide et les parties constituantes dudit organe de distribution.In particular, the present invention aims to provide a fluid dispenser member that decreases or eliminates the risk of harmful interaction between the fluid and the constituent parts of said dispensing member.

La présente invention a aussi pour but de fournir un tel organe de distribution de produit fluide qui permet de réaliser des propriétés d'élasticité optimales avec un encombrement minimal.Another object of the present invention is to provide such a fluid dispenser member which makes it possible to achieve optimum elasticity properties with a minimum space requirement.

La présente invention a aussi pour objet de fournir un tel organe de distribution de produit fluide qui présente des propriétés améliorées de tenue au fluage sous contrainte.The present invention also aims to provide such a fluid dispenser member which has improved properties of stress creep resistance.

La présente invention a également pour but de fournir un tel organe de distribution de produit fluide qui permet une large amplitude de réglage de charge et de déformation selon le type de dispositif dans lequel il est utilisé.The present invention also aims to provide such a fluid dispenser member that allows a wide range of load control and deformation depending on the type of device in which it is used.

La présente invention a aussi pour objet de fournir un tel organe de distribution de produit fluide qui soit simple et peu coûteux à fabriquer et à assembler, et sûr et fiable d'utilisation.The present invention also aims to provide such a fluid dispenser member which is simple and inexpensive to manufacture and assemble, and safe and reliable use.

La présente invention a donc pour objet un organe de distribution de produit fluide selon la revendication 1.The present invention therefore relates to a fluid dispenser member according to claim 1.

Avantageusement, l'anneau ondulé supérieur d'un niveau d'élasticité forme l'anneau ondulé inférieur du niveau d'élasticité disposé directement au-dessus, et l'anneau ondulé inférieur dudit niveau d'élasticité forme l'anneau ondulé supérieur du niveau d'élasticité disposé directement en-dessous.Advantageously, the upper corrugated ring of a level of elasticity forms the lower corrugated ring of the elasticity level disposed directly above, and the lower corrugated ring of said elasticity level forms the upper corrugated ring of the level. of elasticity arranged directly below.

Avantageusement, les points de contact d'un niveau d'élasticité sont décalés par rapport aux points de contact des niveaux d'élasticité directement au-dessus et directement en-dessous, un point de contact du niveau d'élasticité étant disposé au milieu de deux points de contact du niveau d'élasticité directement au-dessus et au milieu de deux points de contact du niveau d'élasticité directement en-dessous.Advantageously, the contact points of a level of elasticity are offset relative to the contact points of the elasticity levels directly above and directly below, a point of contact of the elasticity level being disposed in the middle of the elasticity level. two points of contact of the level of elasticity directly above and in the middle of two points of contact of the level of elasticity directly below.

Avantageusement, ledit matériau synthétique est chargé avec des matériaux renforçant l'élasticité et/ou la tenue au fluage, tel que des fibres de verre et/ou des nanotubes de carbone.Advantageously, said synthetic material is loaded with reinforcing materials and / or creep resistance, such as glass fibers and / or carbon nanotubes.

Avantageusement, ledit produit fluide est un médicament liquide ou pulvérulent.Advantageously, said fluid product is a liquid or powdery medicine.

Avantageusement, ledit organe de distribution est une pompe ou une valve, lesdits moyens de distribution étant le piston de pompe ou la soupape de valve, et ledit organe élastique formant le ressort de rappel de ladite pompe ou valve.Advantageously, said dispensing member is a pump or a valve, said dispensing means being the pump piston or the valve valve, and said resilient member forming the return spring of said pump or valve.

Avantageusement, ledit organe de distribution est une chasse d'air comprimé, lesdits moyens de distribution étant le piston de la chasse d'air, et ledit organe élastique formant le ressort de rappel de ladite chasse d'air.Advantageously, said dispensing member is a flush of compressed air, said dispensing means being the plunger of the air flush, and said resilient member forming the return spring of said flush.

La présente invention a également pour objet un dispositif de distribution de produit fluide, comportant un réservoir contenant ledit produit fluide, et comportant un organe de distribution tel que décrit ci-dessus.The present invention also relates to a fluid dispenser device, comprising a reservoir containing said fluid product, and comprising a dispensing member as described above.

Ces caractéristiques et avantages et d'autres de la présente invention apparaîtront plus clairement au cours de la description détaillée suivante de celle-ci, faite en référence aux dessins joints, donnés à titre d'exemples non limitatifs, et sur lesquels

  • La figure 1 est une vue schématique en section transversale d'une partie d'un organe de distribution de produit fluide selon une première variante de réalisation de la présente invention,
  • La figure 2 est une vue similaire à la figure 1, montrant une autre variante de réalisation d'un organe de distribution de produit fluide selon la présente invention, et
  • La figure 3 est vue schématique en perspective de détail d'un organe élastique selon un mode de réalisation avantageux de la présente invention.
These and other features and advantages of the present invention will appear more clearly in the following detailed description thereof, with reference to the accompanying drawings, given by way of non-limiting examples, and in which:
  • The figure 1 is a schematic cross-sectional view of a portion of a fluid dispenser member according to a first embodiment of the present invention,
  • The figure 2 is a view similar to the figure 1 showing another alternative embodiment of a fluid dispenser member according to the present invention, and
  • The figure 3 is schematic perspective view of detail of an elastic member according to an advantageous embodiment of the present invention.

En se référant à la figure 1, il est représenté une première variante de réalisation d'un organe de distribution de produit fluide 10 selon la présente invention. Dans cette première variante de réalisation, l'organe de distribution de produit fluide 10 est une pompe comportant un corps de pompe 11 dans lequel coulisse un piston 20 formant des moyens de distribution actionnés manuellement. Ce piston 20, lorsqu'il est déplacé dans ledit corps 11 vers sa position de distribution, expulsera une dose de produit fluide à travers un orifice de distribution 12 de la pompe, celui-ci étant généralement relié à une tête de distribution (non représentée) qui comporte l'orifice de pulvérisation à travers lequel le produit fluide sera définitivement distribué à l'utilisateur. Le piston 20 est sollicité par un organe élastique 100 vers sa position de repos et lorsque l'utilisateur actionne manuellement la pompe, il enfonce le piston 20 à l'intérieur du corps de pompe 11 en comprimant l'organe élastique 100. Lorsqu'il relâche son effort d'actionnement, ledit organe élastique 100 comprimé ramène automatiquement le piston 20 de la pompe 10 dans sa position de repos, qui est celle représentée sur la figure 1. La pompe représentée sur la figure 1 est une pompe d'un type particulier, et il est entendu que la présente invention ne se limite pas à cette pompe particulière, mais que tout type de pompe peut être concerné. Il est également à noter qu'une valve pourrait aussi être utilisée en tant qu'organe de distribution de produit fluide selon la présente invention. Dans ce cas, ce n'est pas un piston mais une soupape de valve qui se déplace contre la force de l'organe élastique à l'intérieur d'un corps de valve approprié.Referring to the figure 1 , there is shown a first alternative embodiment of a fluid dispenser member 10 according to the present invention. In this first embodiment, the fluid dispenser member 10 is a pump comprising a pump body 11 in which slides a piston 20 forming dispensing means manually actuated. This piston 20, when moved in said body 11 towards its dispensing position, will expel a dose of fluid product through a dispensing orifice 12 of the pump, the latter being generally connected to a dispensing head (not shown ) which comprises the spray orifice through which the fluid product will be permanently distributed to the user. The piston 20 is urged by an elastic member 100 towards its rest position and when the user manually actuates the pump, he pushes the piston 20 inside the pump body 11 by compressing the elastic member 100. releasing its actuating force, said compressed elastic member 100 automatically returns the piston 20 of the pump 10 to its rest position, which is that represented on the figure 1 . The pump shown on the figure 1 is a pump of a particular type, and it is understood that the present invention is not limited to this particular pump, but that any type of pump may be concerned. It should also be noted that a valve could also be used as a fluid dispenser member according to the present invention. In this case, it is not a piston but a valve valve that moves against the force of the elastic member within a suitable valve body.

La figure 2 représente une autre variante de réalisation d'un organe de distribution de produit fluide 10 selon la présente invention. Dans cette seconde variante, l'organe de distribution de produit fluide 10 est une chasse d'air, comportant un corps 11 dans lequel un piston 20 se déplace pour comprimer de l'air et ainsi créer une chasse d'air comprimé. Cet air comprimé permettra de distribuer une dose de produit fluide, généralement de la poudre, disposée en aval de ladite chasse d'air. Lorsque l'utilisateur appuie sur le piston de chasse d'air 20, il va comprimer l'organe élastique 100 et l'air contenu à l'intérieur du corps de chasse d'air 11, jusqu'à ce que cet air comprimé soit distribué, par exemple à partir d'un seuil de compression donné ou à partir d'une ouverture mécanique d'un orifice approprié 12. Lorsque ensuite l'utilisateur relâche son effort d'actionnement sur le piston de chasse d'air 20, celui-ci est automatiquement ramené vers sa position de repos par l'organe élastique 100 comprimé. L'utilisateur peut alors changer la cartouche de produit fluide, ou similaire, du dispositif de distribution de produit fluide auquel est associée ladite chasse d'air, pour distribuer la prochaine dose. A nouveau, la figure 2 ne représente qu'un exemple de réalisation particulier, et la présente invention n'est évidemment pas limitée par cette variante telle que représentée.The figure 2 represents another alternative embodiment of a fluid dispenser member 10 according to the present invention. In this second variant, the fluid dispenser member 10 is an air flush, comprising a body 11 in which a piston 20 moves for compress air and thus create a flush of compressed air. This compressed air will dispense a dose of fluid, usually powder, disposed downstream of said flush. When the user presses on the air discharge piston 20, he will compress the elastic member 100 and the air contained inside the air flushing body 11, until this compressed air is dispensed, for example from a given compression threshold or from a mechanical opening of a suitable orifice 12. When the user then releases his actuating force on the air flushing piston 20, that it is automatically returned to its rest position by the elastic member 100 compressed. The user can then change the fluid cartridge, or the like, of the fluid dispensing device with which the flush is associated, to dispense the next dose. Again, the figure 2 represents only one particular embodiment, and the present invention is obviously not limited by this variant as shown.

Selon l'invention, l'organe élastique 100 présente une structure particulière très différente d'un ressort à spirale habituellement utilisé dans ce genre de dispositifs. La figure 3 représente une vue schématique en perspective d'un mode de réalisation avantageux de l'organe élastique 100. Celui-ci comporte une pluralité de cellules élastiques C qui sont disposées en parallèle autour de l'axe longitudinal X de l'organe élastique 100. Cette pluralité de cellules élastiques C en parallèle forme un niveau d'élasticité N. Selon l'invention, l'organe élastique 100 comporte une pluralité de niveaux d'élasticité, en l'occurrence les niveau N-2, N-1, N, N+1, N+2 et N+3 sur la figure 3. Bien entendu, un nombre différent de niveaux d'élasticité peut être utilisé. Ces niveaux d'élasticité sont superposés les uns aux autres le long dudit axe longitudinal X.According to the invention, the elastic member 100 has a particular structure very different from a spiral spring usually used in this type of device. The figure 3 is a schematic perspective view of an advantageous embodiment of the elastic member 100. The latter comprises a plurality of elastic cells C which are arranged in parallel around the longitudinal axis X of the elastic member 100. plurality of elastic cells C in parallel forms a level of elasticity N. According to the invention, the elastic member 100 comprises a plurality of elasticity levels, in this case the N-2, N-1, N, N + 1, N + 2 and N + 3 on the figure 3 . Of course, a different number of levels of elasticity can be used. These levels of elasticity are superimposed on each other along said longitudinal axis X.

En se référant plus particulièrement au niveau d'élasticité N, celui-ci comporte un anneau ondulé supérieur 110 à ondulation multiples et un anneau ondulé inférieur 120 également à ondulation multiples. Ces anneaux ondulés supérieur et inférieur 110, 120 sont disposés de telle sorte qu'ils se touchent en plusieurs points de contact P qui sont répartis autour dudit axe longitudinal X. Ainsi, un creux de l'anneau ondulé supérieur va venir en contact avec un sommet de l'anneau ondulé inférieur pour former un point de contact P. De cette manière, entre deux points de contact P adjacents, il sera formé une cellule élastique C, et un ainsi une pluralité de cellules élastiques C sont réparties autour de la périphérie dudit niveau d'élasticité N.Referring more particularly to the level of elasticity N, it comprises an upper corrugated ring 110 with multiple corrugations and a lower corrugated ring 120 also with multiple corrugations. These upper and lower corrugated rings 110, 120 are arranged in such a way that they touch each other at several points of contact P which are distributed around said axis X. Thus, a hollow of the upper corrugated ring will come into contact with a top of the lower corrugated ring to form a contact point P. In this way, between two adjacent contact points P, it will be formed a elastic cell C, and thus a plurality of elastic cells C are distributed around the periphery of said level of elasticity N.

Comme visible sur la figure 3, l'anneau ondulé supérieur du niveau d'élasticité N forme l'anneau ondulé inférieur du niveau d'élasticité disposé directement au-dessus N+1 et l'anneau ondulé inférieur du niveau d'élasticité N forme l'anneau ondulé supérieur du niveau d'élasticité disposé directement en-dessous N-1. En d'autres termes, chaque niveau d'élasticité comporte le même nombre de cellules élastiques C et de points de contact P. En particulier, les points de contact du niveau d'élasticité N sont décalés par rapport aux points de contact des niveaux d'élasticité directement au-dessus N+1 et directement en-dessous N-1, avec un point de contact du niveau d'élasticité N qui est disposé au milieu de deux points de contact du niveau d'élasticité directement au-dessus N+1 et au milieu de deux points de contact du niveau d'élasticité directement en-dessous N-1. En d'autres termes, les points de contact d'un niveau d'élasticité forment les sommets des cellules élastiques des niveaux d'élasticité directement au-dessus et en-dessous, et vice versa.As visible on the figure 3 the upper corrugated ring of the elasticity level N forms the lower corrugated ring of the elasticity level arranged directly above N + 1 and the lower corrugated ring of the elasticity level N forms the upper corrugated ring of the elasticity level disposed directly below N-1. In other words, each level of elasticity comprises the same number of elastic cells C and contact points P. In particular, the contact points of the elasticity level N are offset with respect to the contact points of the levels of elasticity. elasticity directly above N + 1 and directly below N-1, with a point of contact of the level of elasticity N which is arranged in the middle of two points of contact of the level of elasticity directly above N + 1 and in the middle of two points of contact of the level of elasticity directly below N-1. In other words, the points of contact of a level of elasticity form the vertices of the elastic cells of the levels of elasticity directly above and below, and vice versa.

De préférence, les bords axiaux supérieur et inférieur de l'organe élastique 100 sont formés par des anneaux complètement plats 130, 140. Ainsi, les premiers niveaux d'élasticité à partir du haut et du bas de l'organe élastique 100 ne sont pas des niveaux d'élasticité complets puisque leurs cellules élastiques C ne sont pas formées par deux anneaux ondulés mais seulement par un anneau ondulé associé à un anneau plat. Dans l'exemple de la figure 3, l'organe élastique 100 comporte six niveaux d'élasticité complets, plus les deux niveaux partiels définis par les bords axiaux supérieur 130 et inférieur 140.Preferably, the upper and lower axial edges of the elastic member 100 are formed by completely flat rings 130, 140. Thus, the first levels of elasticity from the top and the bottom of the elastic member 100 are not complete elasticity levels since their elastic cells C are not formed by two corrugated rings but only by a corrugated ring associated with a flat ring. In the example of the figure 3 , the elastic member 100 has six complete levels of elasticity, plus the two partial levels defined by the upper axial edges 130 and lower 140.

Cette structure à plusieurs niveaux de cellules multiples en parallèle est particulièrement avantageuse. D'une part elle permet de réaliser des organes élastiques à faible encombrement. En effet, par rapport à un ressort à spirale classique, la même force de compression peut être obtenue par l'organe élastique de la présente invention pour environ un encombrement correspondant à 50% de l'espace axial. L'organe élastique de la présente invention convient donc particulièrement pour des courses de déformation faibles, par exemple jusqu'à environ 20 mm de déformation, qui sont caractéristiques des pompes ou valves utilisées dans l'industrie pharmaceutique. Par ailleurs, l'organe élastique 100 de la présente invention présente des caractéristiques améliorées de tenue au fluage sous contrainte, car il est constitué de plusieurs séries de cellules disposées en parallèle, contrairement aux ressorts à spirale qui sont constitués de cellules ou spires disposées uniquement en série. De plus, la déformation élastique est répartie de manière sensiblement homogène ou uniforme sur la totalité de chaque cellule, ce qui favorise la durée de vie et la constance de performance du ressort dans le temps, en éliminant les zones locales fortement contraintes à chaque actionnement. Ceci est encore renforcé par les anneaux supérieur et inférieur parfaitement plats, qui répartissent de manière homogène la force de déformation axiale sur toutes les cellules du ressort. Par ailleurs, en fonction de l'épaisseur des anneaux, de leur section ronde ou rectangulaire ou autre, de la matière et de la taille des cellules élastiques, une grande amplitude de réglage de charge et de déformation peut être réalisée selon le type de dispositif de distribution dans lequel l'organe élastique sera utilisé. La présente invention s'applique donc tout particulièrement aux dispositifs de distribution de produit fluide du domaine pharmaceutique, et notamment pour distribuer des médicaments liquides ou sous forme de poudres au moyen de pompes, de valves, d'inhalateurs de poudre, d'unidose, etc.This multilevel multi-cell structure in parallel is particularly advantageous. On the one hand, it makes it possible to produce elastic members with small dimensions. Indeed, compared to a spring Conventional spiral, the same compression force can be obtained by the elastic member of the present invention for about a footprint corresponding to 50% of the axial space. The elastic member of the present invention is therefore particularly suitable for small deformation strokes, for example up to about 20 mm deformation, which are characteristic of pumps or valves used in the pharmaceutical industry. Furthermore, the elastic member 100 of the present invention has improved characteristics of stress creep resistance, because it consists of several series of cells arranged in parallel, in contrast to the spiral springs which consist of cells or turns arranged only serial. In addition, the elastic deformation is distributed substantially homogeneously or uniformly over the whole of each cell, which promotes the service life and the constancy of performance of the spring over time, eliminating the highly stressed local areas with each actuation. This is further reinforced by the perfectly flat upper and lower rings, which distribute the axial deformation force uniformly over all the cells of the spring. Furthermore, depending on the thickness of the rings, their round or rectangular section or other, the material and the size of the elastic cells, a large amplitude of charge control and deformation can be achieved depending on the type of device in which the elastic member will be used. The present invention therefore applies particularly to fluid dispensing devices of the pharmaceutical field, and in particular for dispensing liquid or powder-form drugs by means of pumps, valves, powder inhalers, single dose, etc.

De préférence, l'organe élastique 100 est réalisé en matériau synthétique, notamment par injection ou moulage. On évite ainsi notamment les risques d'interaction néfaste entre l'organe élastique et le produit fluide à distribuer. Par exemple, l'organe élastique 100 peut être réalisé en polyoxyméthylène (POM). D'autres matériaux sont aussi envisageables. Avantageusement, le matériau synthétique peut être chargé avec un ou plusieurs matériaux renforçant l'élasticité et/ou la tenue au fluage, tels que des fibres de verre ou des nanotubes de carbone.Preferably, the elastic member 100 is made of synthetic material, in particular by injection or molding. This avoids in particular the risk of harmful interaction between the elastic member and the fluid to be dispensed. For example, the elastic member 100 may be made of polyoxymethylene (POM). Other materials are also possible. Advantageously, the synthetic material can be loaded with one or a plurality of materials that enhance elasticity and / or creep resistance, such as glass fibers or carbon nanotubes.

Bien que la présente invention ait été décrite en référence aux dessins joints, elle n'est pas limitée par ceux-ci, mais au contraire l'homme du métier peut y apporter toute modification utile sans sortir du cadre de la présente invention tel que défini par les revendications annexées.Although the present invention has been described with reference to the accompanying drawings, it is not limited by them, but on the contrary the person skilled in the art can make any useful modification without departing from the scope of the present invention as defined by the appended claims.

Claims (8)

  1. A fluid dispenser member (10) comprising a body (11) and manually-actuated dispenser means (20) that are movable in said body (11) between a rest position and a dispensing position, said dispenser means (20) being urged resiliently towards their rest position by a resilient member (100), said resilient member (100) comprising a plurality of spring cells (C) that are arranged in parallel around a longitudinal axis (X) of said resilient member (100), forming a spring stage (N), said resilient member (100) including a plurality of spring stages (..., N-1, N, N+1, ...) that are superposed along said longitudinal axis (X), said resilient member being made by injection molding a synthetic material, such as POM, the top and bottom axial ends of said resilient member (100) being formed by flat rings (130, 140), said resilient member (100) being characterized in that a spring stage (N) comprises a top undulating ring (110) having multiple undulations, and a bottom undulating ring (120) having multiple undulations, said top and bottom undulations being arranged relative to each other in such a manner that said top and bottom undulating rings (110, 120) are in contact at a plurality of contact points (P) distributed around said longitudinal axis (X), a spring cell (C) being defined between two adjacent contact points (P) of said spring stage (N).
  2. A member according to claim 1, wherein the top undulating ring of a spring stage (N) forms the bottom undulating ring of the spring stage (N+1) arranged directly above, and the bottom undulating ring of said spring stage (N) forms the top undulating ring of the spring stage (N-1) arranged directly below.
  3. A member according to claim 2, wherein the contact points of a spring stage (N) are offset relative to the contact points of the spring stages (N+1, N-1) that are directly above and directly below, a contact point of the spring stage (N) being arranged half way between two contact points of the spring stage (N+1) that is directly above, and half way between two contact points of the spring stage (N-1) that is directly below, so that the resilient deformation forces of each cell are distributed in approximately uniform manner over all of said cell.
  4. A member according to any preceding claim, wherein said synthetic material is filled with materials that increase resilience and/or prevent creep, such as glass fibers and/or carbon nanotubes.
  5. A member according to any preceding claim, wherein said fluid is a liquid or powder medication.
  6. A member according to any preceding claim, wherein said dispenser member is a pump or a valve, said dispenser means being the pump piston or the valve member, and said resilient member forming the return spring of said pump or valve.
  7. A member according to any preceding claim, wherein said dispenser member is a compressed-air expeller, said dispenser means being the piston of the air expeller, and said resilient member forming the return spring of said air expeller.
  8. A fluid dispenser device comprising a reservoir containing said fluid, said device being characterized in that it further comprises a dispenser member (10) according to any preceding claim.
EP11712613.6A 2010-02-24 2011-02-22 Dispensing head for a fluid and dispenser comprising such a dispensing head Active EP2539078B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1051312A FR2956649B1 (en) 2010-02-24 2010-02-24 FLUID PRODUCT DISPENSING DEVICE AND FLUID PRODUCT DISPENSING DEVICE COMPRISING SUCH ORGAN.
PCT/FR2011/050360 WO2011104470A1 (en) 2010-02-24 2011-02-22 Unit for dispensing a fluid product and device for distributing a fluid product comprising such a unit

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EP2539078B1 true EP2539078B1 (en) 2013-12-25

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EP (1) EP2539078B1 (en)
JP (1) JP2013520308A (en)
CN (1) CN102858467A (en)
BR (1) BR112012021381A2 (en)
FR (1) FR2956649B1 (en)
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EP2539078A1 (en) 2013-01-02
FR2956649A1 (en) 2011-08-26
CN102858467A (en) 2013-01-02
JP2013520308A (en) 2013-06-06
WO2011104470A1 (en) 2011-09-01
FR2956649B1 (en) 2012-08-03
US20120325861A1 (en) 2012-12-27
BR112012021381A2 (en) 2018-01-16

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