EP3261779B1 - Pushbutton for a system for dispensing a product under pressure - Google Patents

Pushbutton for a system for dispensing a product under pressure Download PDF

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Publication number
EP3261779B1
EP3261779B1 EP16723428.5A EP16723428A EP3261779B1 EP 3261779 B1 EP3261779 B1 EP 3261779B1 EP 16723428 A EP16723428 A EP 16723428A EP 3261779 B1 EP3261779 B1 EP 3261779B1
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EP
European Patent Office
Prior art keywords
dispensing
product
dimension
upstream end
wall
Prior art date
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EP16723428.5A
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German (de)
French (fr)
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EP3261779A1 (en
Inventor
Jean-Pierre Guy Songbe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silgan Dispensing Systems Le Treport SAS
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Albea Le Treport SAS
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Publication of EP3261779A1 publication Critical patent/EP3261779A1/en
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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
    • B65D83/75—Aerosol containers not provided for in groups B65D83/16 - B65D83/74
    • B65D83/753—Aerosol containers not provided for in groups B65D83/16 - B65D83/74 characterised by details or accessories associated with outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
    • B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis

Definitions

  • the invention relates to a push button for a pressurized dispensing system for a product, as well as to such a dispensing system.
  • the distribution system is intended to equip bottles used in perfumery, cosmetics or for pharmaceutical treatments.
  • this type of bottle contains a product which is returned by a dispensing system comprising a device for withdrawing said product under pressure, said system being actuated by a push button to allow the product to be sprayed.
  • the sampling device comprises a pump or a valve actuated manually by means of the push button.
  • Such pushbuttons are conventionally made in two parts: an actuating body and a product spray nozzle which are associated with one another to form a vortex assembly comprising a vortex chamber provided with a dispensing orifice as well as at least one. supply channel of said chamber.
  • a push button in which the vortex chamber is delimited by a side surface having a frustoconical geometry with respect to which the supply channel or channels extend in a transverse plane, said side surface being convergent from an upstream end, in which the The downstream end of the supply channel or channels opens out tangentially, towards a downstream supply opening of the dispensing orifice, said orifice having an outlet dimension which is equal to the internal dimension of said downstream opening.
  • the tangential supply of the swirl chamber makes it possible to put the product in rotation in the upstream end of said chamber, the product is then pressed and rotated along the lateral surface. of said chamber by forming a sheet of product whose speed of rotation increases and which converges towards the opening downstream, then said converging sheet can escape through the dispensing orifice without being deformed so as to be able to be impacted to form the aerosol.
  • This embodiment allows the distribution of an aerosol formed by a uniform spatial distribution of droplets suspended in the air, the size of said droplets being small and uniform.
  • the aerosol can then have the appearance of a plume of smoke with droplet sizes of between 10 ⁇ m and 60 ⁇ m with an average of 35 ⁇ m for an alcoholic product, regardless of the strength of pressure that the user exerts on the push button.
  • the viscoelastic behavior of said product can in particular cause a layer of product to adhere to the lateral surface of the swirl chamber, which can have effects. negative not only on the quality of the aerosol dispensed, but also during subsequent dispensing.
  • a dispensing device comprising a pusher comprising a side wall delimiting a housing in which an outlet nozzle is fitted.
  • a stud protrudes into the nozzle receiving housing.
  • this block is made a recess.
  • a dispensing device comprising a pusher comprising a frustoconical nozzle of geometry of revolution about a distribution axis or of polygonal geometry.
  • the invention aims to improve the prior art by proposing in particular a push button allowing the dispensing of an aerosol formed of droplets exhibiting an improved calibration and spatial distribution, and this even for products to be dispensed of high viscosity such as lotions. .
  • the invention provides a push button for a system for dispensing a product under pressure, said push button comprising a body having a mounting well on a pipe for supplying the product under pressure. and a housing in communication with said well, said housing being provided with an anvil around which a nozzle sprayer is mounted so as to form a product distribution path between said housing and a turbulence assembly comprising a turbulence chamber provided with a distribution orifice as well as at least two supply channels of said chamber which are arranged symmetrically with respect to a distribution axis, said swirl chamber being delimited by a lateral surface having a polygonal geometry with respect to which the supply channels extend in a transverse plane, said lateral surface being convergent from an upstream end, wherein the downstream end of the supply channels emerges, towards a downstream supply opening of the dispensing orifice, said dispensing orifice having an outlet dimension which is equal to the internal dimension of said downstream opening, the swirl assembly further having
  • the invention is characterized mainly in that the recess is formed on the distal wall facing said cavity, the upstream end having an angular alternation of radial ridges supplied by the channels and non-supplied radial ridges. , the number of supply channels being greater than two.
  • the invention provides a system for dispensing a product under pressure, comprising a sampling device equipped with a tube for supplying the product under pressure on which the well of such a push button is mounted for allow the product to be sprayed.
  • a push button for a pressurized dispensing system for a product is described below, said product possibly being of any kind, in particular used in perfumery, cosmetics or for pharmaceutical treatments.
  • the product to be dispensed is a fluid product of the lotion type, and in particular has a viscosity greater than that of water, for example approximately ten times greater than that of water.
  • a viscosity greater than that of water for example approximately ten times greater than that of water.
  • Such products are generally obtained by adding to their base composition, the fluidity of which is substantially identical to that of water, a stabilizing and / or thickening viscoelastic substance, for example xanthan gum.
  • a stabilizing and / or thickening viscoelastic substance for example xanthan gum.
  • Such a substance is generally added in very small proportions, for example of the order of 0.25%, so that the final product remains fluid while exhibiting specific rheological behavior.
  • the push button comprises a body 1 having an annular skirt 2 which surrounds a well 3 for mounting the push button on a supply tube 4 for the product under pressure. Furthermore, the push button comprises an upper zone 5 allowing the user to exert a digital pressure on said push button in order to be able to move it axially. In the embodiment shown, the push button is equipped with an aspect trim 6 which surrounds the body 1 and on which the upper bearing zone 5 is formed.
  • the distribution system comprises a sampling device 7 equipped with a supply tube 4 for the pressurized product which is inserted in a sealed manner into the well 3.
  • the distribution system also comprises means 8 for mounting on a bottle 9 containing the product and means 10 for withdrawing the product inside said bottle which are arranged to supply the supply tube 4 with product under pressure.
  • the sampling device 7 may comprise a manually actuated pump or, in the case where the product is packaged under pressure in the bottle, a manually operated valve.
  • a manually actuated pump or, in the case where the product is packaged under pressure in the bottle, a manually operated valve.
  • the pump or the valve is actuated to supply the supply tube 4 with product under pressure.
  • the body 1 also has an annular housing 11 which is in communication with the well 3.
  • the housing 11 has an axis perpendicular to that of the mounting well 3 to allow lateral spraying of the product relative to the body. 1 of the push button.
  • the housing 11 can be collinear with the well 3, in particular for a push button forming a nasal spray nozzle.
  • the housing 11 is provided with an anvil 12 around which a spray nozzle 13 is mounted so as to form a distribution path for the product under pressure between said housing and a swirl assembly.
  • the anvil 12 extends from the bottom of the housing 11, leaving a communication channel 14 between the well 3 and said housing.
  • the nozzle 13 has a cylindrical side wall 15 of revolution which is closed towards the front by a proximal wall 16.
  • the association of the nozzle 13 in the housing 11 is produced by fitting the outer face. of the side wall 15, the rear edge of said outer face being further provided with a radial projection 17 for anchoring the nozzle 13 in said housing.
  • an imprint of the turbulence assembly is formed recessed in the proximal wall 16 and the anvil 12 has a distal wall 18 on which the proximal wall 16 of the nozzle 13 bears to delimit the assembly between them.
  • an imprint of the turbulence assembly can be formed directly on a wall of the housing 11, in particular for a nasal spray tip.
  • the distribution path supplies the swirl unit with product under pressure which comprises a swirl chamber 21 provided with a distribution orifice 22 as well as more than two supply channels 23 for said chamber which are arranged symmetrically. relative to a distribution axis D.
  • the supply channels 23 communicate with the downstream annular duct 20. In particular, this makes it possible to limit the length of the supply channels 23 in order to reduce the pressure losses induced.
  • the swirl chamber 21 is delimited by a lateral surface 24 having a polygonal geometry which extends along the distribution axis D, the supply channels 23 extending in a plane transverse to said distribution axis. In the description, the terms of positioning in space are defined with respect to the distribution axis D.
  • the lateral surface 24 converges from an upstream end 25, into which the downstream end of the supply channels 23 opens, towards a downstream opening 26 for supplying the distribution orifice 22, said distribution orifice having a dimension of outlet which is equal to the internal dimension of the downstream opening 26.
  • the downstream end of the supply channels 23 opens out in the extension of respectively a radial edge AR of the upstream end 25.
  • the supply of the swirl chamber 21 along the edges AR of its upstream end 25 makes it possible to put the product in rotation in said upstream end.
  • the product is then pressed and rotated along the side surface 24 of the swirl chamber 21, so as to form a sheet of product whose speed of rotation increases and which converges towards the downstream opening 26, then said sheet convergent can escape through the dispensing orifice 22 without being deformed so as to be able to be impacted to form the aerosol.
  • the polygonal shape of the lateral surface 24 makes it possible, during the rotation of the web, to break the intermolecular bonds of the product each time that said web comes into contact with an axial edge AA of said lateral surface, which allows, in the case where the product to be dispensed has a high viscosity, to pre-fragment the flow of said product before it leaves the dispensing orifice 22, and to distribute said product in the form of a aerosol with a uniform spatial distribution of airborne droplets, the size of said droplets being small and uniform.
  • the turbulence chamber 21 has a lateral surface 24 of pyramidal geometry, therefore a square section.
  • the swirl chamber 21 may have polygonal geometries of various shapes, for example a prismatic geometry, that is to say of triangular section, or a pentagonal geometry, or a hexagonal geometry.
  • a prismatic geometry that is to say of triangular section, or a pentagonal geometry, or a hexagonal geometry.
  • the turbulence assembly has two supply channels 23 of the turbulence chamber 21 which respectively open out into the extension of two opposite radial ridges AR of the upstream end 25.
  • each channel 23 has a U-shaped section which is delimited between an outer wall 27 and an inner wall 28.
  • the wall outer 27 extends radially in the extension of an edge AR of the upstream end 25, and the inner wall 28 is offset from it by a distance less than 30% of the internal dimension of the upstream end 25, so as to avoid impaction of the product in said upstream end.
  • the inner wall 28 is parallel to the outer wall 27.
  • the inner wall 28 has an angle of convergence with the outer wall 27 in the upstream-downstream direction, the offset between said walls. being then measured at the level of the unblocking section of the channels 23 in the upstream end 25.
  • more than two supply channels 23 are provided, in particular according to the geometry of the lateral surface 24 of the chamber 21, and therefore the geometry of the upstream end 25.
  • the turbulence assembly has supply channels 23 which are arranged so that the upstream end 25 has an angular alternation of radial edges AR supplied by channels 23 and radial edges AR not supplied, so as to allow a uniform supply of the swirl chamber 21.
  • the turbulence assembly can have as many supply channels 23 as the number of radial edges AR of the upstream end 25, so that all the radial edges AR of said upstream end are respectively supplied by a supply channel 23.
  • each of the supply channels 23 form a supply section of the swirl chamber 21.
  • this feed section can be small relative to the internal surface of the upstream end 25.
  • the surface of the feed section can be less than 10% of the internal surface of the end. upstream 25.
  • the area of the feed section may be between 0.02 mm 2 and 0.04 mm 2 .
  • the internal dimension of the upstream end 25 is 0.6 mm, i.e. an internal surface of 0.36 mm 2
  • each channel 23 has a width of 0.12 mm and a depth of 0 , 13 mm, or an area of 0.0312 mm 2 for the feed section.
  • the dispensing time is increased.
  • the distribution time can be between 0.5 and 2 seconds so as to allow the user to interrupt the dispensing of the aerosol during actuation.
  • the downstream opening 26 of the swirl chamber is surmounted by a distribution orifice 22 having a polygonal geometry which extends along the distribution axis D, the internal dimension of said orifice being constant and equal to the dimension internal of the downstream opening 26.
  • the polygonal geometry of the dispensing orifice 22 is identical to that of the side surface 24 of the swirl chamber 21, so that said polygonal geometries both have the same number of axial edges AA, AA '.
  • the axial edges AA 'of the dispensing orifice 22 are each arranged in the axial extension of respectively an axial edge AA of the swirl chamber 21.
  • the axial edges AA' of the dispensing orifice 22 can be angularly offset with respect to the axial edges AA of the swirl chamber 21, which can make it possible to further break the intermolecular bonds of the fluid before it leaves the swirl assembly, in particular when the viscosity of said product is high, and therefore improve the quality of the aerosol dispensed.
  • the axial dimension of the dispensing orifice 22 is small compared to its internal dimension, so as not to disturb the convergence of the web.
  • the axial dimension of the dispensing orifice 22 may be less than 50% of its internal dimension.
  • the axial dimension of the distribution orifice 22 can be zero, so that the downstream opening 26 of the swirl chamber 21 can form the distribution orifice 22.
  • the proximal wall 16 of the nozzle 13 has a planar outer face 16a into which the dispensing orifice 22 opens.
  • the outer face 16a may have a slightly concave geometry, at least in the region surrounding the orifice. distribution 22, in order to form a protective bowl for the web without hindering its impaction.
  • the production of the aerosol is particularly satisfactory when the internal dimension of the downstream opening 26 is small relative to the internal dimension of the upstream end 25, so that the impaction of the web is carried out as close as possible to the distribution orifice 22.
  • the internal dimension of the downstream opening 26 may be less than 50% of the internal dimension of the upstream end 25, more precisely being between 20% and 40% of said internal dimension.
  • the axial dimension of the swirl chamber 21 is relatively large, in particular of the order of or greater than the internal dimension of the upstream end 25, so as to allow the establishment of the web along the surface. side 24 of said swirl chamber and to impart progressive convergence.
  • the axial dimension of the swirl chamber 21 is at least equal to 80% of the internal dimension of the upstream end 25, more precisely being between 90% and 200% of said internal dimension.
  • the internal dimension of the upstream end 25 is 0.6 mm
  • the internal dimension of the downstream opening 26 is less or equal to 0.24 mm, being in particular between 0.15 mm and 0.24 mm
  • the axial dimension of the swirl chamber 21 is at least equal to 0.5 mm
  • the axial dimension of the dispensing orifice 22 is less than or equal to 0.16 mm.
  • the lateral surface 24 may have an angle of convergence of between 20 ° and 150 °, and in particular equal to 90 °.
  • the turbulence assembly also has a recess 29 which is formed upstream and axially facing the turbulence chamber 21, said recess being arranged to form a turbulence counter-chamber in order to ensure a uniform spatial distribution of the droplets, in particular inside the product envelope which converges in the swirl chamber 21.
  • an imprint of the swirl chamber 21 and of the supply channels 23 is formed on the proximal wall 16 of the nozzle 13, the recess 29 being formed on the distal wall 18 of the anvil 12 opposite said said footprint.
  • the recess 29 has a geometry of revolution around the distribution axis D.
  • the recess 29 has a frustoconical geometry which diverges slightly towards the turbulence chamber 21, which makes it easier to produce it.
  • the recess 29 may have a polygonal geometry, in particular with a square section.
  • the dimensions of the recess 29 may vary.
  • the recess 29 has a downstream end 30 which is arranged opposite the swirl chamber 21 in alignment with the distribution orifice 22, said downstream end having an internal dimension which is greater than or equal to 200% of the internal dimension of the dispensing orifice.
  • the internal dimension of the downstream end 30 of the recess 29 is in particular greater than or equal to 300% of the internal dimension of the dispensing orifice 22.
  • the recess 29 may have an axial dimension which is all the greater as the viscosity of the fluid to be dispensed is high.
  • the recess 29 has an upstream end 31 of internal dimension approximately equal to 0.24 mm, a downstream end 30 of internal dimension approximately equal to 0.45 mm, as well as an axial dimension at least equal to 1.2 mm.

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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)

Description

L'invention concerne un bouton poussoir pour un système de distribution sous pression d'un produit, ainsi qu'un tel système de distribution.The invention relates to a push button for a pressurized dispensing system for a product, as well as to such a dispensing system.

Dans une application particulière, le système de distribution est destiné à équiper des flacons utilisés en parfumerie, en cosmétique ou pour des traitements pharmaceutiques. En effet, ce type de flacon contient un produit qui est restitué par un système de distribution comprenant un dispositif de prélèvement sous pression dudit produit, ledit système étant actionné par un bouton poussoir pour permettre la pulvérisation du produit. En particulier, le dispositif de prélèvement comprend une pompe ou une valve à actionnement manuel par l'intermédiaire du bouton poussoir.In a particular application, the distribution system is intended to equip bottles used in perfumery, cosmetics or for pharmaceutical treatments. In fact, this type of bottle contains a product which is returned by a dispensing system comprising a device for withdrawing said product under pressure, said system being actuated by a push button to allow the product to be sprayed. In particular, the sampling device comprises a pump or a valve actuated manually by means of the push button.

De tels boutons poussoirs sont classiquement réalisés en deux parties : un corps d'actionnement et une buse de pulvérisation du produit qui sont associés entre eux pour former un ensemble tourbillonnaire comprenant une chambre tourbillonnaire pourvue d'un orifice de distribution ainsi qu'au moins un canal d'alimentation de ladite chambre.Such pushbuttons are conventionally made in two parts: an actuating body and a product spray nozzle which are associated with one another to form a vortex assembly comprising a vortex chamber provided with a dispensing orifice as well as at least one. supply channel of said chamber.

En particulier, on connaît du document FR-2 952 360 un bouton poussoir dans lequel la chambre tourbillonnaire est délimitée par une surface latérale présentant une géométrie tronconique par rapport à laquelle le ou les canaux d'alimentation s'étendent dans un plan transversal, ladite surface latérale étant convergente depuis une extrémité amont, dans laquelle l'extrémité aval du ou des canaux d'alimentation débouche tangentiellement, vers une ouverture aval d'alimentation de l'orifice de distribution, ledit orifice présentant une dimension de sortie qui est égale à la dimension interne de ladite ouverture aval.In particular, we know from the document FR-2 952 360 a push button in which the vortex chamber is delimited by a side surface having a frustoconical geometry with respect to which the supply channel or channels extend in a transverse plane, said side surface being convergent from an upstream end, in which the The downstream end of the supply channel or channels opens out tangentially, towards a downstream supply opening of the dispensing orifice, said orifice having an outlet dimension which is equal to the internal dimension of said downstream opening.

Ainsi, lors de la distribution sous pression du produit, l'alimentation tangentielle de la chambre tourbillonnaire permet de mettre le produit en rotation dans l'extrémité amont de ladite chambre, le produit est ensuite plaqué et poussé en rotation le long de la surface latérale de ladite chambre en formant une nappe de produit dont la vitesse de rotation augmente et qui converge vers l'ouverture aval, puis ladite nappe convergente peut s'échapper par l'orifice de distribution sans être déformée de sorte à pouvoir s'impacter pour former l'aérosol.Thus, during the pressurized distribution of the product, the tangential supply of the swirl chamber makes it possible to put the product in rotation in the upstream end of said chamber, the product is then pressed and rotated along the lateral surface. of said chamber by forming a sheet of product whose speed of rotation increases and which converges towards the opening downstream, then said converging sheet can escape through the dispensing orifice without being deformed so as to be able to be impacted to form the aerosol.

Cette réalisation permet la distribution d'un aérosol formé d'une répartition spatiale uniforme de gouttelettes en suspension dans l'air, la taille desdites gouttelettes étant petite et uniforme. En particulier, l'aérosol peut présenter alors l'aspect d'un panache de fumée avec des tailles de gouttelettes comprises entre 10 µm et 60 µm avec une moyenne de 35 µm pour un produit alcoolique, et ce quelle que soit la force d'appui que l'utilisateur exerce sur le bouton poussoir.This embodiment allows the distribution of an aerosol formed by a uniform spatial distribution of droplets suspended in the air, the size of said droplets being small and uniform. In particular, the aerosol can then have the appearance of a plume of smoke with droplet sizes of between 10 μm and 60 μm with an average of 35 μm for an alcoholic product, regardless of the strength of pressure that the user exerts on the push button.

Toutefois, cette réalisation, si elle s'avère particulièrement satisfaisante pour la distribution de produit très fluides, tels que par exemple les parfums ou les eaux de toilettes, peut en revanche poser problème dans le cas de produits avec une viscosité plus importante, tel que par exemple les lotions dont la viscosité est notamment supérieure à 10 fois celle de l'eau.However, this embodiment, if it proves particularly satisfactory for the distribution of very fluid products, such as for example perfumes or toilet waters, can on the other hand pose a problem in the case of products with a greater viscosity, such as for example lotions, the viscosity of which is in particular greater than 10 times that of water.

En effet, lors de la distribution d'une dose de produit de type lotion, le comportement viscoélastique dudit produit peut notamment entraîner l'adhérence d'une couche de produit à la surface latérale de la chambre de turbulence, ce qui peut avoir des effets négatifs non seulement sur la qualité de l'aérosol distribué, mais également lors des distributions ultérieures.Indeed, when dispensing a dose of lotion-type product, the viscoelastic behavior of said product can in particular cause a layer of product to adhere to the lateral surface of the swirl chamber, which can have effects. negative not only on the quality of the aerosol dispensed, but also during subsequent dispensing.

On connait du document FR 2 907 106 un dispositif de distribution comportant un poussoir comprenant une paroi latérale délimitant un logement dans lequel est emboîtée une buse de sortie. Un plot fait saillie dans le logement de réception de buse. Dans ce plot est ménagé un évidement.We know from the document FR 2 907 106 a dispensing device comprising a pusher comprising a side wall delimiting a housing in which an outlet nozzle is fitted. A stud protrudes into the nozzle receiving housing. In this block is made a recess.

On connait du document FR 2 952 360 un dispositif de distribution comportant un poussoir comprenant une buse tronconique de géométrie de révolution autour d'un axe de distribution ou de géométrie polygonale.We know from the document FR 2 952 360 a dispensing device comprising a pusher comprising a frustoconical nozzle of geometry of revolution about a distribution axis or of polygonal geometry.

L'invention vise à perfectionner l'art antérieur en proposant notamment un bouton poussoir permettant la distribution d'un aérosol formé de gouttelettes présentant une calibration et une répartition spatiale améliorées, et ce même pour des produits à distribuer de viscosité importante telles que des lotions.The invention aims to improve the prior art by proposing in particular a push button allowing the dispensing of an aerosol formed of droplets exhibiting an improved calibration and spatial distribution, and this even for products to be dispensed of high viscosity such as lotions. .

A cet effet, et selon un premier aspect, l'invention propose un bouton poussoir pour un système de distribution sous pression d'un produit, ledit bouton poussoir comprenant un corps présentant un puits de montage sur un tube d'amenée du produit sous pression et un logement en communication avec ledit puits, ledit logement étant pourvu d'une enclume autour de laquelle une buse de pulvérisation est montée de sorte à former un chemin de distribution du produit entre ledit logement et un ensemble de turbulence comprenant une chambre de turbulence pourvue d'un orifice de distribution ainsi qu'au moins deux canaux d'alimentation de ladite chambre qui sont disposés symétriquement par rapport à un axe de distribution, ladite chambre de turbulence étant délimitée par une surface latérale présentant une géométrie polygonale par rapport à laquelle les canaux d'alimentation s'étendent dans un plan transversal, ladite surface latérale étant convergente depuis une extrémité amont, dans laquelle débouche l'extrémité aval des canaux d'alimentation, vers une ouverture aval d'alimentation de l'orifice de distribution, ledit orifice de distribution présentant une dimension de sortie qui est égale à la dimension interne de ladite ouverture aval, l'ensemble de turbulence présentant en outre un évidement qui est formé en amont et en regard axial de la chambre de turbulence, la buse présentant une paroi proximale dans laquelle est formée une empreinte de l'ensemble de turbulence et l'enclume présentant une paroi distale sur laquelle la paroi proximale de la buse est en appui pour délimiter entre elles ledit ensemble de turbulence, une empreinte de la chambre de turbulence et des canaux d'alimentation étant formée sur la paroi proximale. L'invention se caractérise à titre principal en ce que l'évidement est formé sur la paroi distale en regard de ladite empreinte, l'extrémité amont présentant une alternance angulaire d'arêtes radiales alimentées par les canaux et d'arêtes radiales non-alimentées, le nombre de canaux d'alimentation étant supérieur à deux.To this end, and according to a first aspect, the invention provides a push button for a system for dispensing a product under pressure, said push button comprising a body having a mounting well on a pipe for supplying the product under pressure. and a housing in communication with said well, said housing being provided with an anvil around which a nozzle sprayer is mounted so as to form a product distribution path between said housing and a turbulence assembly comprising a turbulence chamber provided with a distribution orifice as well as at least two supply channels of said chamber which are arranged symmetrically with respect to a distribution axis, said swirl chamber being delimited by a lateral surface having a polygonal geometry with respect to which the supply channels extend in a transverse plane, said lateral surface being convergent from an upstream end, wherein the downstream end of the supply channels emerges, towards a downstream supply opening of the dispensing orifice, said dispensing orifice having an outlet dimension which is equal to the internal dimension of said downstream opening, the swirl assembly further having a recess which is formed upstream and axially facing the swirl chamber, the b use having a proximal wall in which an imprint of the turbulence assembly is formed and the anvil having a distal wall on which the proximal wall of the nozzle rests to define between them said turbulence assembly, an imprint of the chamber turbulence and feed channels being formed on the proximal wall. The invention is characterized mainly in that the recess is formed on the distal wall facing said cavity, the upstream end having an angular alternation of radial ridges supplied by the channels and non-supplied radial ridges. , the number of supply channels being greater than two.

Selon un deuxième aspect, l'invention propose un système de distribution sous pression d'un produit, comprenant un dispositif de prélèvement équipé d'un tube d'amenée du produit sous pression sur lequel le puits d'un tel bouton poussoir est monté pour permettre la pulvérisation du produit.According to a second aspect, the invention provides a system for dispensing a product under pressure, comprising a sampling device equipped with a tube for supplying the product under pressure on which the well of such a push button is mounted for allow the product to be sprayed.

D'autres objets et avantages de l'invention apparaîtront dans la description qui suit, faite en référence aux figures annexées dans lesquelles :

  • la figure 1 est une vue partielle en coupe longitudinale d'un flacon équipé d'un système de distribution selon un mode de réalisation de l'invention ;
  • la figure 2 est une vue partielle en coupe longitudinale du bouton poussoir de la figure 1 ;
  • les figures 3 sont des vues de la buse du bouton poussoir selon la figure 2, respectivement en perspective écorchée (figure 3a) et de la partie interne (figure 3b) ;
  • la figure 4 est une vue en perspective du volume de l'ensemble de turbulence du bouton poussoir des figures 2 et 3.
Other objects and advantages of the invention will emerge from the following description, made with reference to the appended figures in which:
  • the figure 1 is a partial view in longitudinal section of a bottle equipped with a dispensing system according to one embodiment of the invention;
  • the figure 2 is a partial view in longitudinal section of the push button of the figure 1 ;
  • the figures 3 are views of the push button nozzle according to the figure 2 , respectively in broken perspective ( figure 3a ) and the internal part ( figure 3b );
  • the figure 4 is a perspective view of the volume of the turbulence assembly of the push button of the figures 2 and 3 .

En relation avec les figures, on décrit ci-dessous un bouton poussoir pour un système de distribution sous pression d'un produit, ledit produit pouvant être de toute nature, notamment utilisé en parfumerie, en cosmétique ou pour des traitements pharmaceutiques.In relation to the figures, a push button for a pressurized dispensing system for a product is described below, said product possibly being of any kind, in particular used in perfumery, cosmetics or for pharmaceutical treatments.

En particulier, le produit à distribuer est un produit fluide de type lotion, et présente notamment une viscosité plus importante que celle de l'eau, par exemple environ dix fois supérieure à celle de l'eau. De tels produits sont généralement obtenus en ajoutant à leur composition de base, dont la fluidité est sensiblement identique à celle de l'eau, une substance viscoélastique stabilisante et/ou épaississante, par exemple de la gomme xanthane. Une telle substance est généralement ajoutée dans de très faibles proportions, par exemple de l'ordre de 0,25%, afin que le produit final reste fluide tout en présentant un comportement rhéologique spécifique.In particular, the product to be dispensed is a fluid product of the lotion type, and in particular has a viscosity greater than that of water, for example approximately ten times greater than that of water. Such products are generally obtained by adding to their base composition, the fluidity of which is substantially identical to that of water, a stabilizing and / or thickening viscoelastic substance, for example xanthan gum. Such a substance is generally added in very small proportions, for example of the order of 0.25%, so that the final product remains fluid while exhibiting specific rheological behavior.

Le bouton poussoir comprend un corps 1 présentant une jupe annulaire 2 qui entoure un puits 3 de montage du bouton poussoir sur un tube d'amenée 4 du produit sous pression. Par ailleurs, le bouton poussoir comprend une zone supérieure 5 permettant à l'utilisateur d'exercer un appui digital sur ledit bouton poussoir afin de pouvoir le déplacer axialement. Dans le mode de réalisation représenté, le bouton poussoir est équipé d'un enjoliveur d'aspect 6 qui entoure le corps 1 et sur lequel est formée la zone supérieure 5 d'appui.The push button comprises a body 1 having an annular skirt 2 which surrounds a well 3 for mounting the push button on a supply tube 4 for the product under pressure. Furthermore, the push button comprises an upper zone 5 allowing the user to exert a digital pressure on said push button in order to be able to move it axially. In the embodiment shown, the push button is equipped with an aspect trim 6 which surrounds the body 1 and on which the upper bearing zone 5 is formed.

En relation avec la figure 1, le système de distribution comprend un dispositif de prélèvement 7 équipé d'un tube d'amenée 4 du produit sous pression qui est inséré de façon étanche dans le puits 3. De façon connue, le système de distribution comprend par ailleurs des moyens 8 de montage sur un flacon 9 contenant le produit et des moyens 10 de prélèvement du produit à l'intérieur dudit flacon qui sont agencés pour alimenter le tube d'amenée 4 en produit sous pression.In relation to the figure 1 , the distribution system comprises a sampling device 7 equipped with a supply tube 4 for the pressurized product which is inserted in a sealed manner into the well 3. In a known manner, the distribution system also comprises means 8 for mounting on a bottle 9 containing the product and means 10 for withdrawing the product inside said bottle which are arranged to supply the supply tube 4 with product under pressure.

Le dispositif de prélèvement 7 peut comprendre une pompe à actionnement manuel ou, dans le cas où le produit est conditionné sous pression dans le flacon, une valve à actionnement manuel. Ainsi, lors d'un déplacement manuel du bouton poussoir, la pompe ou la valve est actionnée pour alimenter le tube d'amenée 4 en produit sous pression.The sampling device 7 may comprise a manually actuated pump or, in the case where the product is packaged under pressure in the bottle, a manually operated valve. Thus, during a manual movement of the push button, the pump or the valve is actuated to supply the supply tube 4 with product under pressure.

Le corps 1 présente également un logement annulaire 11 qui est en communication avec le puits 3. Dans le mode de réalisation représenté, le logement 11 est d'axe perpendiculaire à celui du puits de montage 3 pour permettre une pulvérisation latérale du produit relativement au corps 1 du bouton poussoir. En variante non représentée, le logement 11 peut être colinéaire au puits 3, notamment pour un bouton poussoir formant embout nasal de pulvérisation.The body 1 also has an annular housing 11 which is in communication with the well 3. In the embodiment shown, the housing 11 has an axis perpendicular to that of the mounting well 3 to allow lateral spraying of the product relative to the body. 1 of the push button. In a variant not shown, the housing 11 can be collinear with the well 3, in particular for a push button forming a nasal spray nozzle.

Le logement 11 est pourvu d'une enclume 12 autour de laquelle une buse 13 de pulvérisation est montée de sorte à former un chemin de distribution du produit sous pression entre ledit logement et un ensemble de turbulence. Pour ce faire, l'enclume 12 s'étend depuis le fond du logement 11 en laissant un canal 14 de communication entre le puits 3 et ledit logement.The housing 11 is provided with an anvil 12 around which a spray nozzle 13 is mounted so as to form a distribution path for the product under pressure between said housing and a swirl assembly. To do this, the anvil 12 extends from the bottom of the housing 11, leaving a communication channel 14 between the well 3 and said housing.

Dans le mode de réalisation représenté, la buse 13 présente une paroi latérale 15 cylindrique de révolution qui est fermée vers l'avant par une paroi proximale 16. L'association de la buse 13 dans le logement 11 est réalisée par emmanchement de la face externe de la paroi latérale 15, le bord arrière de ladite face externe étant en outre pourvu d'une saillie radiale 17 d'ancrage de la buse 13 dans ledit logement.In the embodiment shown, the nozzle 13 has a cylindrical side wall 15 of revolution which is closed towards the front by a proximal wall 16. The association of the nozzle 13 in the housing 11 is produced by fitting the outer face. of the side wall 15, the rear edge of said outer face being further provided with a radial projection 17 for anchoring the nozzle 13 in said housing.

Par ailleurs, une empreinte de l'ensemble de turbulence est formée en creux dans la paroi proximale 16 et l'enclume 12 présente une paroi distale 18 sur laquelle la paroi proximale 16 de la buse 13 est en appui pour délimiter entre elles l'ensemble de turbulence. En variante non représentée, une empreinte de l'ensemble de turbulence peut être formée directement sur une paroi du logement 11, notamment pour un embout nasal de pulvérisation.Furthermore, an imprint of the turbulence assembly is formed recessed in the proximal wall 16 and the anvil 12 has a distal wall 18 on which the proximal wall 16 of the nozzle 13 bears to delimit the assembly between them. turbulence. In a variant not shown, an imprint of the turbulence assembly can be formed directly on a wall of the housing 11, in particular for a nasal spray tip.

De façon avantageuse, la buse 13 et le corps 1 sont réalisés par moulage, notamment d'un matériau thermoplastique différent. En outre, le matériau formant la buse 13 présente une rigidité qui est supérieure à la rigidité du matériau formant le corps 1. Ainsi, la raideur importante de la buse 13 permet d'éviter sa déformation lors de son montage dans le logement 11 de sorte à garantir la géométrie de l'ensemble de turbulence. En outre, la raideur moins importante du corps 1 permet d'une part un toucher plus qualitatif lors de l'actionnement et d'autre part une étanchéité améliorée entre le puits de montage 3 et le tube d'amenée 4. Enfin, la rigidité plus grande de la buse 13 permet d'améliorer la fiabilité de l'harponnage de la saillie 17 dans le logement 11 afin d'éviter le risque d'expulsion de la buse 13 lors de la distribution
Dans un exemple de réalisation, le corps 1 est réalisé en polyoléfine et la buse 13 est réalisée en copolymère cyclo oléfinique (COC), en poly(oxyméthylène) ou en poly(butylène téréphtalate).
Dans le mode de réalisation représenté, le chemin de distribution présente successivement en communication d'amont en aval :

  • un conduit annulaire amont 19 en communication avec le canal 14, ledit conduit annulaire étant formé entre la face interne de la paroi latérale 15 de la buse 13 et la face externe de la paroi latérale de l'enclume 12 qui est disposée en regard ;
  • un conduit annulaire aval 20 formé entre la paroi proximale 16 de la buse 13 et la paroi distale 18 de l'enclume 12.
Advantageously, the nozzle 13 and the body 1 are made by molding, in particular from a different thermoplastic material. In addition, the material forming the nozzle 13 has a rigidity which is greater than the rigidity of the material forming the body 1. Thus, the significant stiffness of the nozzle 13 makes it possible to avoid its deformation during its assembly in the housing 11 so to guarantee the geometry of the turbulence assembly. In addition, the lower stiffness of the body 1 allows on the one hand a more qualitative feel during actuation and on the other hand an improved seal between the mounting well 3 and the supply tube 4. Finally, the rigidity larger of the nozzle 13 improves the reliability of the harpooning of the projection 17 in the housing 11 in order to avoid the risk of expulsion of the nozzle 13 during dispensing
In an exemplary embodiment, the body 1 is made of polyolefin and the nozzle 13 is made of cycloolefinic copolymer (COC), of poly (oxymethylene) or of poly (butylene terephthalate).
In the embodiment shown, the distribution path successively presents in communication from upstream to downstream:
  • an upstream annular duct 19 in communication with the channel 14, said annular duct being formed between the inner face of the side wall 15 of the nozzle 13 and the outer face of the side wall of the anvil 12 which is placed opposite;
  • a downstream annular duct 20 formed between the proximal wall 16 of the nozzle 13 and the distal wall 18 of the anvil 12.

Du coté aval, le chemin de distribution alimente en produit sous pression l'ensemble de turbulence qui comprend une chambre de turbulence 21 pourvue d'un orifice de distribution 22 ainsi que plus de deux canaux 23 d'alimentation de ladite chambre qui sont disposés symétriquement par rapport à un axe de distribution D. Plus précisément, les canaux d'alimentation 23 communiquent avec le conduit annulaire aval 20. En particulier, ce permet de limiter la longueur des canaux d'alimentation 23 afin de réduire les pertes de charge induites.
La chambre de turbulence 21 est délimitée par une surface latérale 24 présentant une géométrie polygonale qui s'étend suivant l'axe de distribution D, les canaux d'alimentation 23 s'étendant dans un plan transversal par rapport audit axe de distribution. Dans la description, les termes de positionnement dans l'espace sont définis par rapport à l'axe de distribution D.
La surface latérale 24 est convergente depuis une extrémité amont 25, dans laquelle débouche l'extrémité aval des canaux d'alimentation 23, vers une ouverture aval 26 d'alimentation de l'orifice de distribution 22, ledit orifice de distribution présentant une dimension de sortie qui est égale à la dimension interne de l'ouverture aval 26.On the downstream side, the distribution path supplies the swirl unit with product under pressure which comprises a swirl chamber 21 provided with a distribution orifice 22 as well as more than two supply channels 23 for said chamber which are arranged symmetrically. relative to a distribution axis D. More precisely, the supply channels 23 communicate with the downstream annular duct 20. In particular, this makes it possible to limit the length of the supply channels 23 in order to reduce the pressure losses induced.
The swirl chamber 21 is delimited by a lateral surface 24 having a polygonal geometry which extends along the distribution axis D, the supply channels 23 extending in a plane transverse to said distribution axis. In the description, the terms of positioning in space are defined with respect to the distribution axis D.
The lateral surface 24 converges from an upstream end 25, into which the downstream end of the supply channels 23 opens, towards a downstream opening 26 for supplying the distribution orifice 22, said distribution orifice having a dimension of outlet which is equal to the internal dimension of the downstream opening 26.

Dans les figures, l'extrémité aval des canaux d'alimentation 23 débouche dans le prolongement de respectivement une arête radiale AR de l'extrémité amont 25.
Ainsi, lors de la distribution du produit sous pression, l'alimentation de la chambre de turbulence 21 le long des arêtes AR de son extrémité amont 25 permet de mettre le produit en rotation dans ladite extrémité amont. Le produit est ensuite plaqué et poussé en rotation le long de la surface latérale 24 de la chambre de turbulence 21, de sorte à former une nappe de produit dont la vitesse de rotation augmente et qui converge vers l'ouverture aval 26, puis ladite nappe convergente peut s'échapper par l'orifice de distribution 22 sans être déformée de sorte à pouvoir s'impacter pour former l'aérosol.
Par ailleurs, la forme polygonale de la surface latérale 24 permet, lors de la rotation de la nappe, de casser les liaisons intermoléculaires du produit à chaque fois que ladite nappe vient au contact d'une arête axiale AA de ladite surface latérale, ce qui permet, dans le cas où le produit à distribuer présente une viscosité importante, de pré-fragmenter le flux dudit produit avant sa sortie de l'orifice de distribution 22, et de distribuer ledit produit sous forme d'un aérosol avec une répartition spatiale uniforme de gouttelettes en suspension dans l'air, la taille desdites gouttelettes étant petite et uniforme.
Sur les figures, la chambre de turbulence 21 présente une surface latérale 24 de géométrie pyramidale, donc une section carrée. En variante, et notamment suivant la viscosité du produit fluide à distribuer, la chambre de turbulence 21 peut présenter des géométries polygonales de formes variées, par exemple une géométrie prismatique, c'est-à-dire de section triangulaire, ou une géométrie pentagonale, ou encore une géométrie hexagonale. Ainsi, il est possible d'ajuster le nombre d'arêtes axiales AA qui est optimal pour pré-fragmenter le flux de produit dans la chambre de turbulence 21.In the figures, the downstream end of the supply channels 23 opens out in the extension of respectively a radial edge AR of the upstream end 25.
Thus, during the distribution of the product under pressure, the supply of the swirl chamber 21 along the edges AR of its upstream end 25 makes it possible to put the product in rotation in said upstream end. The product is then pressed and rotated along the side surface 24 of the swirl chamber 21, so as to form a sheet of product whose speed of rotation increases and which converges towards the downstream opening 26, then said sheet convergent can escape through the dispensing orifice 22 without being deformed so as to be able to be impacted to form the aerosol.
Furthermore, the polygonal shape of the lateral surface 24 makes it possible, during the rotation of the web, to break the intermolecular bonds of the product each time that said web comes into contact with an axial edge AA of said lateral surface, which allows, in the case where the product to be dispensed has a high viscosity, to pre-fragment the flow of said product before it leaves the dispensing orifice 22, and to distribute said product in the form of a aerosol with a uniform spatial distribution of airborne droplets, the size of said droplets being small and uniform.
In the figures, the turbulence chamber 21 has a lateral surface 24 of pyramidal geometry, therefore a square section. As a variant, and in particular depending on the viscosity of the fluid to be dispensed, the swirl chamber 21 may have polygonal geometries of various shapes, for example a prismatic geometry, that is to say of triangular section, or a pentagonal geometry, or a hexagonal geometry. Thus, it is possible to adjust the number of axial edges AA which is optimal for pre-fragmenting the product flow in the swirl chamber 21.

Dans les figures, l'ensemble de turbulence présente deux canaux d'alimentation 23 de la chambre de turbulence 21 qui débouchent respectivement dans le prolongement de deux arêtes radiales AR opposées de l'extrémité amont 25.
Par ailleurs, pour alimenter la chambre de turbulence 21 en faisant tourner le produit le long de sa surface latérale 24, chaque canal 23 présente une section en U qui est délimitée entre une paroi extérieure 27 et une paroi intérieure 28. En particulier, la paroi extérieure 27 s'étend radialement dans le prolongement d'une arête AR de l'extrémité amont 25, et la paroi intérieure 28 est décalée d'elle d'une distance inférieure à 30% de la dimension interne de l'extrémité amont 25, de sorte à éviter une impaction du produit dans ladite extrémité amont.
En relation avec les figures, la paroi intérieure 28 est parallèle à la paroi extérieure 27. Dans une variante non représentée, la paroi intérieure 28 présente un angle de convergence avec la paroi extérieure 27 dans le sens amont-aval, le décalage entre lesdites parois étant alors mesuré au niveau de la section de débouchage des canaux 23 dans l'extrémité amont 25.In the figures, the turbulence assembly has two supply channels 23 of the turbulence chamber 21 which respectively open out into the extension of two opposite radial ridges AR of the upstream end 25.
Furthermore, to feed the swirl chamber 21 by rotating the product along its side surface 24, each channel 23 has a U-shaped section which is delimited between an outer wall 27 and an inner wall 28. In particular, the wall outer 27 extends radially in the extension of an edge AR of the upstream end 25, and the inner wall 28 is offset from it by a distance less than 30% of the internal dimension of the upstream end 25, so as to avoid impaction of the product in said upstream end.
In relation to the figures, the inner wall 28 is parallel to the outer wall 27. In a variant not shown, the inner wall 28 has an angle of convergence with the outer wall 27 in the upstream-downstream direction, the offset between said walls. being then measured at the level of the unblocking section of the channels 23 in the upstream end 25.

Selon l'invention, plus de deux canaux d'alimentation 23 sont prévus, notamment selon la géométrie de la surface latérale 24 de la chambre 21, et donc la géométrie de l'extrémité amont 25. En particulier, l'ensemble de turbulence présente des canaux d'alimentation 23 qui sont disposés de manière à ce que l'extrémité amont 25 présente une alternance angulaire d'arêtes radiales AR alimentées par des canaux 23 et d'arêtes radiales AR non-alimentées, de sorte à permettre une alimentation uniforme de la chambre de turbulence 21.According to the invention, more than two supply channels 23 are provided, in particular according to the geometry of the lateral surface 24 of the chamber 21, and therefore the geometry of the upstream end 25. In particular, the turbulence assembly has supply channels 23 which are arranged so that the upstream end 25 has an angular alternation of radial edges AR supplied by channels 23 and radial edges AR not supplied, so as to allow a uniform supply of the swirl chamber 21.

Selon une variante ne faisant pas partie de l'invention, l'ensemble de turbulence peut présenter autant de canaux d'alimentation 23 que le nombre d'arêtes radiales AR de l'extrémité amont 25, de sorte que toutes les arêtes radiales AR de ladite extrémité amont soient alimentées par respectivement un canal d'alimentation 23.According to a variant not forming part of the invention, the turbulence assembly can have as many supply channels 23 as the number of radial edges AR of the upstream end 25, so that all the radial edges AR of said upstream end are respectively supplied by a supply channel 23.

Par ailleurs, l'ensemble des extrémités aval de chacun des canaux d'alimentation 23 forme une section d'alimentation de la chambre de turbulence 21. Pour augmenter la durée de distribution d'une dose de produit sur la course d'actionnement du bouton poussoir, on peut prévoir que cette section d'alimentation soit faible relativement à la surface intérieure de l'extrémité amont 25. En particulier, la surface de la section d'alimentation peut être inférieure à 10% de la surface intérieure de l'extrémité amont 25.
De façon préférentielle, la surface de la section d'alimentation peut être comprise entre 0,02 mm2 et 0,04 mm2. Dans un exemple de réalisation, la dimension interne de l'extrémité amont 25 est de 0,6 mm, soit une surface intérieure de 0,36 mm2, et chaque canal 23 présente une largeur de 0,12 mm et une profondeur de 0,13 mm, soit une surface de 0,0312 mm2 pour la section d'alimentation.Furthermore, all of the downstream ends of each of the supply channels 23 form a supply section of the swirl chamber 21. To increase the duration of dispensing a dose of product on the actuation stroke of the button pusher, provision can be made for this feed section to be small relative to the internal surface of the upstream end 25. In particular, the surface of the feed section can be less than 10% of the internal surface of the end. upstream 25.
Preferably, the area of the feed section may be between 0.02 mm 2 and 0.04 mm 2 . In an exemplary embodiment, the internal dimension of the upstream end 25 is 0.6 mm, i.e. an internal surface of 0.36 mm 2 , and each channel 23 has a width of 0.12 mm and a depth of 0 , 13 mm, or an area of 0.0312 mm 2 for the feed section.

En outre, du fait du passage du produit dans une section d'alimentation réduite, la durée de distribution est augmentée. Par exemple, pour une dose de 120 µl la durée de distribution peut être comprise entre 0,5 et 2 secondes de sorte à laisser la possibilité à l'utilisateur d'interrompre la distribution de l'aérosol en cours d'actionnement.Further, by passing the product through a reduced feed section, the dispensing time is increased. For example, for a dose of 120 µl, the distribution time can be between 0.5 and 2 seconds so as to allow the user to interrupt the dispensing of the aerosol during actuation.

Dans les figures, l'ouverture aval 26 de la chambre de turbulence est surmontée par un orifice de distribution 22 présentant une géométrie polygonale qui s'étend suivant l'axe de distribution D, la dimension interne dudit orifice étant constante et égale à la dimension interne de l'ouverture aval 26.
En particulier, la géométrie polygonale de l'orifice de distribution 22 est identique à celle de la surface latérale 24 de la chambre de turbulence 21, de sorte que lesdites géométries polygonales présentent toutes deux le même nombre d'arêtes axiales AA, AA'.In the figures, the downstream opening 26 of the swirl chamber is surmounted by a distribution orifice 22 having a polygonal geometry which extends along the distribution axis D, the internal dimension of said orifice being constant and equal to the dimension internal of the downstream opening 26.
In particular, the polygonal geometry of the dispensing orifice 22 is identical to that of the side surface 24 of the swirl chamber 21, so that said polygonal geometries both have the same number of axial edges AA, AA '.

Dans les figures, les arêtes axiales AA' de l'orifice de distribution 22 sont disposées chacune dans le prolongement axial de respectivement une arête axiale AA de la chambre de turbulence 21. En variante, les arêtes axiales AA' de l'orifice de distribution 22 peuvent être décalées angulairement par rapport aux arêtes axiales AA de la chambre de turbulence 21, ce qui peut permettre de briser davantage les liaisons intermoléculaires du produit fluide avant sa sortie de l'ensemble de turbulence, notamment lorsque la viscosité dudit produit est importante, et donc d'améliorer la qualité de l'aérosol distribué.
De façon avantageuse, la dimension axiale de l'orifice de distribution 22 est faible par rapport à sa dimension interne, de sorte à ne pas perturber la convergence de la nappe. En particulier, la dimension axiale de l'orifice de distribution 22 peut être inférieure à 50% de sa dimension interne.
En variante non représentée, la dimension axiale de l'orifice de distribution 22 peut être nulle, de sorte que l'ouverture aval 26 de la chambre de turbulence 21 peut former l'orifice de distribution 22.In the figures, the axial edges AA 'of the dispensing orifice 22 are each arranged in the axial extension of respectively an axial edge AA of the swirl chamber 21. As a variant, the axial edges AA' of the dispensing orifice 22 can be angularly offset with respect to the axial edges AA of the swirl chamber 21, which can make it possible to further break the intermolecular bonds of the fluid before it leaves the swirl assembly, in particular when the viscosity of said product is high, and therefore improve the quality of the aerosol dispensed.
Advantageously, the axial dimension of the dispensing orifice 22 is small compared to its internal dimension, so as not to disturb the convergence of the web. In particular, the axial dimension of the dispensing orifice 22 may be less than 50% of its internal dimension.
In a variant not shown, the axial dimension of the distribution orifice 22 can be zero, so that the downstream opening 26 of the swirl chamber 21 can form the distribution orifice 22.

En relation avec la figure 2, la paroi proximale 16 de la buse 13 présente une face externe plane 16a dans laquelle débouche l'orifice de distribution 22. En variante, la face externe 16a peut présenter une géométrie légèrement concave, au moins au niveau de la zone entourant l'orifice de distribution 22, afin de former une cuvette de protection pour la nappe sans entraver son impaction.In relation to the figure 2 , the proximal wall 16 of the nozzle 13 has a planar outer face 16a into which the dispensing orifice 22 opens. As a variant, the outer face 16a may have a slightly concave geometry, at least in the region surrounding the orifice. distribution 22, in order to form a protective bowl for the web without hindering its impaction.

La réalisation de l'aérosol est particulièrement satisfaisante lorsque la dimension interne de l'ouverture aval 26 est faible relativement à la dimension interne de l'extrémité amont 25, de sorte que l'impaction de la nappe soit réalisée au plus près de l'orifice de distribution 22. En particulier, la dimension interne de l'ouverture aval 26 peut être inférieure à 50% de la dimension interne de l'extrémité amont 25, plus précisément en étant comprise entre 20% et 40% de ladite dimension interne.The production of the aerosol is particularly satisfactory when the internal dimension of the downstream opening 26 is small relative to the internal dimension of the upstream end 25, so that the impaction of the web is carried out as close as possible to the distribution orifice 22. In particular, the internal dimension of the downstream opening 26 may be less than 50% of the internal dimension of the upstream end 25, more precisely being between 20% and 40% of said internal dimension.

De façon préférentielle, la dimension axiale de la chambre de turbulence 21 est relativement importante, notamment de l'ordre ou supérieure à la dimension interne de l'extrémité amont 25, de sorte à permettre l'établissement de la nappe le long de la surface latérale 24 de ladite chambre de turbulence et à conférer une convergence progressive. En particulier, la dimension axiale de la chambre de turbulence 21 est au moins égale à 80% de la dimension interne de l'extrémité amont 25, plus précisément en étant comprise entre 90% et 200% de ladite dimension interne.Preferably, the axial dimension of the swirl chamber 21 is relatively large, in particular of the order of or greater than the internal dimension of the upstream end 25, so as to allow the establishment of the web along the surface. side 24 of said swirl chamber and to impart progressive convergence. In particular, the axial dimension of the swirl chamber 21 is at least equal to 80% of the internal dimension of the upstream end 25, more precisely being between 90% and 200% of said internal dimension.

Selon une réalisation particulière en relation avec un produit dont la pression de distribution est comprise entre 5 et 7 bars, la dimension interne de l'extrémité amont 25 est de 0,6 mm, la dimension interne de l'ouverture aval 26 est inférieure ou égale à 0,24 mm en étant notamment comprise entre 0,15 mm et 0,24 mm, la dimension axiale de la chambre de turbulence 21 est au moins égale à 0,5 mm, la dimension axiale de l'orifice de distribution 22 est inférieure ou égale à 0,16 mm.According to a particular embodiment in relation to a product whose distribution pressure is between 5 and 7 bars, the internal dimension of the upstream end 25 is 0.6 mm, the internal dimension of the downstream opening 26 is less or equal to 0.24 mm, being in particular between 0.15 mm and 0.24 mm, the axial dimension of the swirl chamber 21 is at least equal to 0.5 mm, the axial dimension of the dispensing orifice 22 is less than or equal to 0.16 mm.

Par ailleurs, la surface latérale 24 peut présenter un angle de convergence compris entre 20° et 150°, et notamment égal à 90°.Furthermore, the lateral surface 24 may have an angle of convergence of between 20 ° and 150 °, and in particular equal to 90 °.

En relation avec les figures, l'ensemble de turbulence présente en outre un évidement 29 qui est formé en amont et en regard axial de la chambre de turbulence 21, ledit évidement étant agencé pour former une contre-chambre de turbulence afin d'assurer une répartition spatiale uniforme des gouttelettes, notamment à l'intérieur de l'enveloppe de produit qui converge dans la chambre de turbulence 21.In relation to the figures, the turbulence assembly also has a recess 29 which is formed upstream and axially facing the turbulence chamber 21, said recess being arranged to form a turbulence counter-chamber in order to ensure a uniform spatial distribution of the droplets, in particular inside the product envelope which converges in the swirl chamber 21.

En particulier, une empreinte de la chambre de turbulence 21 et des canaux d'alimentation 23 est formée sur la paroi proximale 16 de la buse 13, l'évidement 29 étant formé sur la paroi distale 18 de l'enclume 12 en regard de ladite empreinte.In particular, an imprint of the swirl chamber 21 and of the supply channels 23 is formed on the proximal wall 16 of the nozzle 13, the recess 29 being formed on the distal wall 18 of the anvil 12 opposite said said footprint.

L'évidement 29 présente une géométrie de révolution autour de l'axe de distribution D. En particulier, l'évidement 29 présente une géométrie tronconique qui diverge légèrement vers la chambre de turbulence 21, ce qui permet de faciliter sa réalisation. En variante, l'évidement 29 peut présenter une géométrie polygonale, notamment à section carrée.The recess 29 has a geometry of revolution around the distribution axis D. In particular, the recess 29 has a frustoconical geometry which diverges slightly towards the turbulence chamber 21, which makes it easier to produce it. As a variant, the recess 29 may have a polygonal geometry, in particular with a square section.

Selon la viscosité du produit à distribuer, les dimensions de l'évidement 29 peuvent varier. En particulier, pour assurer correctement son rôle de contre-chambre de turbulence, l'évidement 29 présente une extrémité aval 30 qui est disposée en regard de la chambre de turbulence 21 dans l'alignement de l'orifice de distribution 22, ladite extrémité aval présentant une dimension interne qui est supérieure ou égale à 200% de la dimension interne de l'orifice de distribution.Depending on the viscosity of the product to be dispensed, the dimensions of the recess 29 may vary. In particular, to correctly perform its role of swirl counter-chamber, the recess 29 has a downstream end 30 which is arranged opposite the swirl chamber 21 in alignment with the distribution orifice 22, said downstream end having an internal dimension which is greater than or equal to 200% of the internal dimension of the dispensing orifice.

Selon une réalisation particulièrement avantageuse, la dimension interne de l'extrémité aval 30 de l'évidement 29 est notamment supérieure ou égale à 300% de la dimension interne de l'orifice de distribution 22.According to a particularly advantageous embodiment, the internal dimension of the downstream end 30 of the recess 29 is in particular greater than or equal to 300% of the internal dimension of the dispensing orifice 22.

Par ailleurs, l'évidement 29 peut présenter une dimension axiale qui est d'autant plus grande que la viscosité du produit fluide à distribuer est importante.Furthermore, the recess 29 may have an axial dimension which is all the greater as the viscosity of the fluid to be dispensed is high.

Selon une réalisation particulière, l'évidement 29 présente une extrémité amont 31 de dimension interne environ égale à 0,24 mm, une extrémité aval 30 de dimension interne environ égale à 0,45 mm, ainsi qu'une dimension axiale au moins égale à 1,2 mm.According to a particular embodiment, the recess 29 has an upstream end 31 of internal dimension approximately equal to 0.24 mm, a downstream end 30 of internal dimension approximately equal to 0.45 mm, as well as an axial dimension at least equal to 1.2 mm.

Claims (11)

  1. Pushbutton for a system for dispensing a product under pressure, said pushbutton comprising a body (1) having a well (3) for mounting on a tube for feeding (4) the pressurised product and a housing (11) in communication with said well, said housing being provided with an anvil (12) around which a spray nozzle (13) is mounted so as to form a path for dispensing the product between said housing and a swirl assembly comprising a swirl chamber (21) provided with a dispensing orifice (22) as well as at least two feeding channels (23) for said chamber which are disposed symmetrically with respect to a dispensing axis (D), said swirl chamber being delimited by a lateral surface (24) having a polygonal geometry with respect to which the ducts (23) extend into a transverse plane, said lateral surface converging from an upstream end (25), into which the downstream end of the ducts (23) leads, to a downstream opening (26) for feeding the dispensing orifice (22), said dispensing orifice having an outlet dimension which is equal to the internal dimension of said downstream opening, the swirl assembly also having a recess (29) formed upstream of and axially facing the chamber (21), the nozzle (13) having a proximal wall (16) wherein is formed a footprint of the swirl assembly and the anvil (12) having a distal wall (18) on which the proximal wall (16) of the nozzle (13) is supported to delimit between them said swirl assembly, a footprint of the swirl chamber (21) and feeding channels (23) being formed on the proximal wall (16), characterised in that the recess (29) is formed on the distal wall (18) facing said footprint, the upstream end (25) having an angular alternance of radial edges (AR) fed by the channels (23) and unfed radial edges (AR), the number of feeding channels being greater than two.
  2. Pushbutton according to claim 1, characterised in that the recess (29) has a downstream end (30) having an inner dimension which is greater than OR equal to 200% of the inner dimension of the dispensing orifice (22).
  3. Pushbutton according to one of claims 1 or 2, characterised in that the inner dimension of the downstream opening (26) is less than 50% of the inner dimension of the upstream end (25) of the swirl chamber (21).
  4. Pushbutton according to any one of claims 1 to 3, characterised in that the axial dimension of the swirl chamber (21) is at least equal to 80% of the inner dimension of the upstream end (25) of said chamber.
  5. Pushbutton according to any one of claims 1 to 4, characterised in that the downstream opening (26) of the swirl chamber (21) is overmounted by a dispensing orifice (22), said dispensing orifice having a polygonal geometry of which the inner dimension is equal to the inner dimension of the downstream opening (26).
  6. Pushbutton according to claim 5, characterised in that the axial dimension of the dispensing orifice (22) is less than 50% of the inner dimension of said dispensing orifice.
  7. Pushbutton according to one of claims 5 or 6, characterised in that the dispensing orifice (22) has axial edges (AA') which are angularly offset with respect to the axial edges (AA) of the swirl chamber (21).
  8. Pushbutton according to any one of claims 1 to 7, characterised in that the downstream end of the feeding channels (23) leads into the extension of respectively a radial edge (AR) of the upstream end (25).
  9. Pushbutton according to claim 8, characterised in that the feeding channels (23) are delimited between an outer wall (27) and an inner wall (28), the outer wall (27) extending radially into the extension of an edge (AR) of the upstream end (25) and the inner wall (28) being offset from it by a distance less than 30% of the inner dimension of the upstream end (25).
  10. Pushbutton according to any one of claims 1 to 9, characterised in that the recess (29) has a revolving geometry about the dispensing axis (D).
  11. System for dispensing a product under pressure, comprising a sampling device (7) equipped with a tube for feeding (4) the pressurised product on which the well (3) of a pushbutton according to any one of claims 1 to 10 is mounted to allow the spraying of the product.
EP16723428.5A 2015-02-24 2016-04-21 Pushbutton for a system for dispensing a product under pressure Active EP3261779B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1551547A FR3032895B1 (en) 2015-02-24 2015-02-24 PUSH BUTTON FOR A PRESSURE DISTRIBUTION SYSTEM OF A PRODUCT
PCT/FR2016/050942 WO2016174331A1 (en) 2015-02-24 2016-04-21 Pushbutton for a system for dispensing a product under pressure

Publications (2)

Publication Number Publication Date
EP3261779A1 EP3261779A1 (en) 2018-01-03
EP3261779B1 true EP3261779B1 (en) 2021-06-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16723428.5A Active EP3261779B1 (en) 2015-02-24 2016-04-21 Pushbutton for a system for dispensing a product under pressure

Country Status (3)

Country Link
EP (1) EP3261779B1 (en)
FR (1) FR3032895B1 (en)
WO (1) WO2016174331A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2907106A1 (en) * 2006-10-16 2008-04-18 Rexam Dispensing Systems Sas Fluid product e.g. cosmetic product, dispensing device, has push-button including annular fitting wall having specific thickness with respect to recess, where thickness is specific times lower than that of thickness of wall

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129893A (en) * 1962-05-31 1964-04-21 Edward Howard Green Spray head for swirling spray
FR2931136A1 (en) * 2008-05-14 2009-11-20 Rexam Dispensing Systems Sas PUSH BUTTON WITH CONVERGENT DISTRIBUTION CHANNELS
FR2952360B1 (en) * 2009-11-06 2011-12-09 Rexam Dispensing Sys PUSH BUTTON FOR A SYSTEM FOR DISTRIBUTING A PRESSURIZED PRODUCT
FR2955567B1 (en) * 2010-01-25 2012-02-24 Rexam Dispensing Sys PUSH BUTTON FOR A SYSTEM FOR DISTRIBUTING A PRESSURIZED PRODUCT

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2907106A1 (en) * 2006-10-16 2008-04-18 Rexam Dispensing Systems Sas Fluid product e.g. cosmetic product, dispensing device, has push-button including annular fitting wall having specific thickness with respect to recess, where thickness is specific times lower than that of thickness of wall

Also Published As

Publication number Publication date
WO2016174331A8 (en) 2018-01-11
EP3261779A1 (en) 2018-01-03
FR3032895B1 (en) 2019-11-01
FR3032895A1 (en) 2016-08-26
WO2016174331A1 (en) 2016-11-03

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