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EP3210672A1 - Pump for a receptacle, in particular a bottle for a cosmetic product, and a dispensing device comprising such a pump - Google Patents

Pump for a receptacle, in particular a bottle for a cosmetic product, and a dispensing device comprising such a pump Download PDF

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Publication number
EP3210672A1
EP3210672A1 EP17154357.2A EP17154357A EP3210672A1 EP 3210672 A1 EP3210672 A1 EP 3210672A1 EP 17154357 A EP17154357 A EP 17154357A EP 3210672 A1 EP3210672 A1 EP 3210672A1
Authority
EP
European Patent Office
Prior art keywords
membrane
pump
chamber
pump according
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17154357.2A
Other languages
German (de)
French (fr)
Other versions
EP3210672B1 (en
Inventor
Eric Rossignol
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.)
Albea Lacrost SAS
Original Assignee
Albea Lacrost SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Albea Lacrost SAS filed Critical Albea Lacrost SAS
Publication of EP3210672A1 publication Critical patent/EP3210672A1/en
Application granted granted Critical
Publication of EP3210672B1 publication Critical patent/EP3210672B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D34/00—Containers or accessories specially adapted for handling liquid toiletry or cosmetic substances, e.g. perfumes
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/0068—Jars
    • A45D40/0075—Jars with dispensing means
    • 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
    • B05B11/1028—Pumps having a pumping chamber with a deformable wall
    • 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
    • B05B11/1028—Pumps having a pumping chamber with a deformable wall
    • B05B11/1033—Pumps having a pumping chamber with a deformable wall the deformable wall, the inlet and outlet valve elements being integrally formed, e.g. moulded
    • 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
    • B05B11/1028—Pumps having a pumping chamber with a deformable wall
    • B05B11/1035—Pumps having a pumping chamber with a deformable wall the pumping chamber being a bellow
    • 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
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • F04B23/028—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir the pump being mounted on top of the reservoir
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00—Details not otherwise provided for in A45D
    • A45D2200/05—Details of containers
    • A45D2200/054—Means for supplying liquid to the outlet of the container
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00—Details not otherwise provided for in A45D
    • A45D2200/05—Details of containers
    • A45D2200/054—Means for supplying liquid to the outlet of the container
    • A45D2200/056—Reciprocating pumps, i.e. with variable volume chamber wherein pressure and vacuum are alternately generated

Definitions

  • the invention relates to a pump for a receptacle, in particular a bottle of cosmetic product.
  • the invention also relates to a receptacle comprising such a pump.
  • a pump configured to suck the cosmetic product contained in the tank of the bottle to distribute it, for example by means of a nozzle or by a simple opening.
  • the product can be extracted or sprayed from the bottle to allow its application.
  • the pump is often operated by means of a push button on which the user exerts a pressure to trigger the operation of the pump.
  • a pump comprises a pumping chamber whose volume varies to allow the product to be drawn into the chamber through an inlet orifice, when the volume increases, and then expelled outside the chamber through an outlet orifice, when the volume of the chamber decreases.
  • the product leaves the chamber in a distribution conduit, which leads to the opening or the nozzle usually arranged on the push button.
  • pumps are known, each having particular characteristics, in order to function specifically, either with low-viscosity liquid products, or with viscous liquid products, such as creams or foams.
  • pumps whose chamber is formed by a rigid body and a piston that closes the chamber, and whose movement in the body reduces or increases the volume of the chamber.
  • the displacement of the piston is generally controlled by actuating the push-button.
  • Such a pump is used especially for liquid products to vaporize.
  • pumps generally for more viscous products, whose chamber is defined in large part by a flexible membrane, also called “bellows".
  • the volume of the chamber is controlled by deformation of the membrane. In undistorted configuration of the membrane, the volume of the chamber is maximum. When the membrane is deformed, the volume of the chamber decreases, preferably to a volume low enough that a maximum of product exits the chamber.
  • Such pumps also have the advantage of avoiding having recourse to a metal spring, the elements of the pump being made of plastic material.
  • the membrane has a particular shape and is held in a compartment to control the manner in which it bends and unfolds. In fact, it is desired to prevent the membrane from deforming in an undesired configuration, which could damage it and impair the proper functioning of the pump.
  • Another document FR2915467 shows a pump with a diaphragm having an accordion-shaped bellows shape.
  • the bellows folds and unfolds along fold lines of the bellows.
  • the membrane is divided into several parts hooked on the one hand to the push button and on the other hand in the body of the pump.
  • Such a pump is therefore difficult to assemble and therefore complex and expensive to manufacture.
  • the aim of the invention is to improve the situation by avoiding the aforementioned defects by providing a pump provided with a deformable membrane made in one piece, the deformation of which is guided to ensure optimal folding, without having to constrain the membrane in a compartment or give it a complex shape.
  • the invention relates to a pump for a receptacle, in particular a bottle intended to contain a cosmetic product, said pump comprising a variable volume pumping chamber defined at least in part by a deformable membrane, the pump operating by varying the volume of the chamber by elastic deformation of the membrane between an initial state in which the chamber has a maximum volume and a deformed state in which the volume of the chamber is minimal, the chamber being provided with an inlet and an outlet of the product, the pump comprising deformation means of the membrane configured to exert a pressure on the membrane, the pump further comprising a guide rod passing through the membrane, the membrane sliding along the rod when it undergoes said deformation.
  • the invention allows to guide the membrane when it undergoes deformation through the guide rod, and to prevent the membrane bends in a manner damaging to the pump. Indeed, the membrane slides along the rod during its deformation so that the membrane is retained radially relative to the rod, and it moves only along the axis of the rod.
  • the invention also relates to a receptacle, in particular a bottle for a cosmetic product, comprising a pump as mentioned above.
  • the invention relates to a pump 1 for receptacle 10, in particular a bottle intended to contain a cosmetic product.
  • the pump comprises a push button 2 ( Figure 1 (a) ), a deformable membrane 3 ( Figure 1 (b) ) and a sleeve 4 ( Figure 1 (c) ).
  • the pushbutton 2 has the function of allowing the actuation of the pump 1 by a user.
  • the pushbutton 2 here has a cylindrical body 5 provided with an opening 6 for dispensing the product and an upper support wall 7 on which the user exerts a pressure to actuate the pump 1, the pushbutton 2 inserted into the sleeve 4 during actuation.
  • the pushbutton 2 is for example formed of polypropylene type material.
  • the pump further comprises a variable volume pumping chamber 8 defined at least in part by the deformable membrane 3.
  • the pump 1 operates by varying the volume of the chamber 8 by elastic deformation of the membrane between an initial state represented on the Figure 2 (a) wherein the chamber 8 has a maximum volume and a deformed state represented on the Figure 2 (c) in which the volume of the chamber 8 is minimal.
  • the chamber 8 has a shape having a longitudinal axis in the initial state, and here has a rounded dome shape 9 comprising a circular base 11 and an apex 12.
  • the longitudinal axis of the chamber 8 passes substantially through the center of the base 11 and the top 12 of the dome 9.
  • the membrane 3 further has an appendix 13 overlying the dome 9, the interior volume of the dome 9 and the appendix 13 defining the pumping chamber 8.
  • the membrane 3 is here formed of a single elastic material, preferably a polymeric material, for example thermoplastic elastomer type TPE (for "thermoplastic elastomer” in English).
  • the membrane 3 is also provided at its base 11 with an internal flange 14, which is intended to position the dome 9 in the sleeve 4 and serve as an inlet valve of the chamber 8.
  • the longitudinal axis of the membrane 3 passes through the apex 12 and the appendix 13 and substantially through the center of the base 11 of the dome 9.
  • An outer rim 15 is arranged around the base 11 of the membrane 3, to serve as a means of retaining the membrane 3 in the sleeve 4.
  • the sleeve 4 comprises an inner cylinder 16 and an outer cylinder 17 substantially concentric, which serve as guide means of the pushbutton 2.
  • the body 5 of the pushbutton can move between the inner cylinder 16 and the outer cylinder 17.
  • the sleeve 4 is furthermore provided with coupling means 18 with the receptacle 10, for example with a snap-in system as shown in FIGS. Figures 2 (a) to (e) .
  • the latching system is here a ring arranged on the sleeve 4 and a counter-ring arranged on the receptacle 10, the ring being snapped under the counter-ring.
  • the sleeve 4 is further provided with a support wall 19 on which the deformable membrane 3 rests at least in part.
  • the inner cylinder 16 further comprises a retaining catch 21 arranged on the internal face of the inner cylinder 16, so as to block the membrane 3 against the support wall 19.
  • the notch 21 retains the outer rim 15 of the dome 9.
  • the support wall 19 of the sleeve 4 also comprises a through hole 22 which defines an inlet port of the pumping chamber 8.
  • the hole 22 is covered by the internal flange 14 of the membrane when the membrane 3 is inserted into the sleeve 4, so as to form an inlet valve of the chamber 8.
  • the flange 14 is also elastic because it is made of the same material as the membrane 3. Thus, the collar 14 can lift to let the product enter the chamber 8.
  • FIG. 5 An alternative embodiment of a sleeve 40 is shown on the figures 5 and 6 .
  • This sleeve 40 is provided with a removable bottom 41, and comprises in particular the support wall 19 and the rod 20.
  • the element 42, which defines the other part of the sleeve 40, and the bottom 41 are arranged to be assembled.
  • the bottom 41 comprises a circumferential rib 43 which is locked by a detent 44 disposed inside the element 42, as shown in FIG. figure 6 .
  • the pump 1 comprises a deformation means disposed outside the chamber 8 and configured to exert pressure on the membrane 3 when the pushbutton 2 is actuated.
  • the deformation means is a distribution duct 23 having an open end 26 in contact with the membrane 3.
  • the dispensing duct 23 is part of the push-button 2, the duct extending inside the push-button 2 from the inner face of the upper wall 7.
  • the function of the distribution duct 23 is to bring the product leaving the pumping chamber 8 to the opening 6 of the push-button 2.
  • the dispensing duct 23 is In this case, the appendix 13 is inserted into the distribution duct 23, the duct 23 resting on the dome 9 of the membrane 3.
  • the appendix 13 is further provided with a bead 24 external which allows on the one hand to block it in the conduit 23 and on the other hand to ensure the sealing of the contact with the distribution conduit 23.
  • the bead 24 is around the appendix 13, here at the junction of the dome 9, and is dimensioned substantially to the dimensions of the open end 26 of the distribution duct 23.
  • the chamber 8 further comprises an outlet of the product, the outlet orifice being arranged on the membrane 3, preferably on the appendix 13.
  • the outlet orifice is here a slot 25 which opens when the chamber 8 pumping deforms.
  • the distribution duct 23 cooperates with the slot 25 to receive the product leaving the chamber 8.
  • the slot 25 is disposed in the distribution duct 23 beyond the bead 24. Thus, when the product leaves the slot 25 in the distribution duct 23, the product is guided in the distribution duct 23.
  • the sleeve 4 is provided with a rod 20 for guiding the membrane 3, which extends from the support wall 19 of the sleeve 4.
  • the rod 20 is disposed substantially along the axis of the cylinders 16, 17 the sleeve 4.
  • the guide rod 20 passes through the membrane, so that the membrane 3 slides along the rod 20 when it undergoes said deformation, the rod 20 passing through the chamber 8 substantially along the longitudinal axis of the chamber 8
  • the rod 20 passes through the top 12 of the dome 9 from its base 11, as well as the appendix 13, the stem coming out of the appendix 13 into the distribution duct 23.
  • the top 12 of the dome 9 and the appendix 13 and have a through channel that allows the rod 20 to pass through the membrane 3.
  • the rod 20 serves to guide the membrane 3 when it goes from the initial state to the deformed state, and then from the deformed state to the initial state.
  • the dome 9 is thus configured to be able to fold its vertex 12 towards its base 11, the appendage 13 of the membrane 3 also moving towards the base 11 of the dome 9, along the rod 20.
  • the appendix 13 For the slot 25, which is closed in the initial state ( Figure 3 (a) ), opens, the appendix 13 comprises an end 27 in close contact around the rod 20.
  • the rod comprises a retaining head 30 which presses on the end 27 of the appendix 13 in the initial position, so as to cause a slight elastic stress of the dome.
  • the elastic stress makes it possible to constrain the end 27 of the appendage 13 against the rod 20 in order to seal between them.
  • the end 27 of the appendix 13 is friction against the rod 20 during the sliding of the appendix 13 against the rod 20, so as to slightly stretch the appendix 13 and thus cause the opening of the slot 25, as represented by the Figure 3 (b) .
  • the invention makes it possible to open the outlet slit 25 of the product without requiring overpressure in the pumping chamber.
  • diaphragm pumps provided with a known exit slot operate by producing an overpressure inside the chamber, and therefore the cosmetic product, to cause the opening of the slot. But this overpressure may damage the product, causing for example a phase shift, or the membrane, accelerating its wear.
  • FIG. Figure 2 (a) shows the pump 1 in the initial state, in which the chamber 8 has its maximum volume.
  • the dispensing duct 23 presses on the dome 9 which begins to deform as shown in FIG. Figure 2 (a) .
  • the top of the dome 9 flattens, while the slot 25 opens.
  • the dome 9 folds first by lowering towards the base 11, the appendix 13 and the central portion of the dome 9 on which the distribution tube 23 exerts a pressure.
  • the product contained in the chamber 8 begins to be expelled by the slot 25.
  • the pushbutton 2 is fully depressed in the sleeve 4, which causes the folding of the peripheral portion of the dome 9 by forming a circular ring.
  • the crown is formed by two membrane layers folded against each other and forming a bend. Chamber 8 thus reaches a minimum volume of preferably the smallest possible, so that the maximum of product leaves by the slot 25.
  • the membrane 3 remains centered around the longitudinal axis of the sleeve 4. This avoids the risk of poorly controlled folding of the membrane 3.
  • the Figures 2 (d) and 2 (e) show the inverse deformation of the membrane, from the deformed configuration to the initial configuration.
  • the push button 2 When the push button 2 is no longer held down by the user, while the membrane is highly deformed, the volume of the chamber is minimal and the membrane exerts a pressure force against the distribution duct 23, this force being due to the elastic nature of the membrane 3 which tends to return to its original shape.
  • the push-button 2 is thus pushed towards the outside of the sleeve 4 in a telescopic manner.
  • the appendix 13 slides along the rod 20 in the opposite direction, which closes the slot 25 because of the friction which is due to the end 27 clamped around the rod 20.
  • the chamber 8 being closed, a depression is created inside the chamber 8 because its volume increases without sucking air.
  • the depression created in the chamber 8 forces, on the one hand, the flange 14 of the inlet valve to be lifted, and on the other hand causes the suction of the product into the chamber from the receptacle reservoir, like this is represented on the figure 4 .
  • the hole 22 is open and communicates the chamber 8 with the reservoir of the receptacle.
  • the product is thus sucked through the hole 22 in the chamber 8 while the dome 9 returns to its original shape.
  • the membrane 3 has completely returned to its original shape, the chamber 8 is reloaded with the product to be dispensed, so that the pump 1 is again usable.
  • the receptacle does not collect outside air in the reservoir to compensate for the product exit from the chamber.
  • the receptacle is preferably provided with a variable volume reservoir, which decreases as the product is dispensed. Thus, the product is always near the inlet to be sucked into the chamber.
  • the sleeve 40 further comprises a dip tube 28, the sleeve 40 having in these figures a bottom 41 to which is connected the removable tube 28.
  • the tube 28 is intended to be immersed in the tank of the receptacle 10, when the pump 1 is mounted on the receptacle 10.
  • the tube 28 opens into the support wall 19 of the sleeve 40 at the hole 22 of the inlet of the chamber 8.
  • the pump 1 has been triggered, the product rises in the tube 28 by suction to refill the chamber 8 pumping.
  • the pump 1 further comprises a return air passage to compensate for the depression in the tank induced by the rise of the product of the tank of the receptacle in the chamber.
  • the air intake passage which is represented by an arrow coming from the outside of the pump 1 in the reservoir, passes first between the outer cylinder 17 of the sleeve 40 and the cylindrical body 5 of the pushbutton 2 and then goes back up between the cylindrical body 5 of the push-button and the inner cylinder 16 of the sleeve 40. The passage then descends back into the inner cylinder 16 of the sleeve 40 and passes through an opening 29 arranged in the bottom 41 of the sleeve 40, opening 29 opening into the tank. Thus, the air circulates through this passage to bring air into the tank.
  • the outer rim of the base of the membrane 3 is extended against the inner cylinder 16 of the sleeve 40 so that to form an air intake valve, above the opening.
  • the air intake valve closes the opening 29 in the initial position and is folded downwardly of the sleeve 40.
  • the valve moves as shown by the small white arrow on the figure 8 , so that the air can enter the tank through the opening 29.
  • the valve returns to its original shape thanks to the elasticity of the membrane, and thus prevents air from entering or product to come out of the tank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe pour réceptacle (10), notamment un flacon destiné à contenir un produit cosmétique, ladite pompe (1) comportant une chambre (8) de pompage à volume variable définie au moins en partie par une membrane (3) déformable, la pompe (1) fonctionnant en faisant varier le volume de la chambre (8) par déformation élastique de la membrane (3) entre un état initial dans lequel la chambre (8) a un volume maximal et un état déformé dans lequel le volume de la chambre (8) est minimal, la chambre (8) étant dotée d'un orifice d'entrée (22) et d'un orifice de sortie du produit, la pompe (1) comprenant un moyen de déformation de la membrane configuré pour exercer une pression sur la membrane (3), la pompe comportant en outre une tige (20) de guidage traversant la membrane (3), la membrane (3) glissant le long de la tige (20) lorsqu'elle subit ladite déformation.

Figure imgaf001
The invention relates to a pump for a receptacle (10), in particular a bottle intended to contain a cosmetic product, said pump (1) comprising a variable volume pumping chamber (8) defined at least in part by a deformable membrane (3). , the pump (1) operating by varying the volume of the chamber (8) by elastic deformation of the membrane (3) between an initial state in which the chamber (8) has a maximum volume and a deformed state in which the volume of the chamber (8) is minimal, the chamber (8) being provided with an inlet (22) and an outlet of the product, the pump (1) comprising a deformation means of the configured membrane for exerting pressure on the membrane (3), the pump further comprising a guide rod (20) traversing the membrane (3), the membrane (3) sliding along the rod (20) when it undergoes said deformation .
Figure imgaf001

Description

L'invention concerne une pompe pour réceptacle, notamment un flacon de produit cosmétique. L'invention se rapporte également à un réceptacle comprenant une telle pompe.The invention relates to a pump for a receptacle, in particular a bottle of cosmetic product. The invention also relates to a receptacle comprising such a pump.

Certains flacons de produits cosmétiques sont pourvus d'une pompe configurée pour aspirer le produit cosmétique contenu dans le réservoir du flacon afin de le distribuer, par exemple au moyen d'une buse ou par une simple ouverture. Le produit peut ainsi être extrait ou pulvérisé du flacon afin de permettre son application. La pompe est souvent actionnée au moyen d'un bouton-poussoir sur lequel l'utilisateur exerce une pression pour déclencher le fonctionnement de la pompe. Une pompe comprend en particulier une chambre de pompage dont le volume varie pour permettre l'aspiration du produit dans la chambre par un orifice d'entrée, lorsque le volume augmente, puis son expulsion en dehors de la chambre par un orifice de sortie, lorsque le volume de la chambre diminue. Le produit sort de la chambre dans un conduit de distribution, qui le mène à l'ouverture ou la buse habituellement agencée sur le bouton-poussoir.Some bottles of cosmetic products are provided with a pump configured to suck the cosmetic product contained in the tank of the bottle to distribute it, for example by means of a nozzle or by a simple opening. The product can be extracted or sprayed from the bottle to allow its application. The pump is often operated by means of a push button on which the user exerts a pressure to trigger the operation of the pump. In particular, a pump comprises a pumping chamber whose volume varies to allow the product to be drawn into the chamber through an inlet orifice, when the volume increases, and then expelled outside the chamber through an outlet orifice, when the volume of the chamber decreases. The product leaves the chamber in a distribution conduit, which leads to the opening or the nozzle usually arranged on the push button.

On connait différentes sortes de pompes, ayant chacune des caractéristiques particulières, afin de fonctionner spécifiquement, soit avec des produits liquides peu visqueux, ou bien avec des produits liquides visqueux, telles des crèmes ou des mousses. Ainsi, il existe des pompes dont la chambre est formée par un corps rigide et d'un piston qui ferme la chambre, et dont le déplacement dans le corps réduit ou augmente le volume de la chambre. Le déplacement du piston est en général contrôlé en actionnant le bouton-poussoir. Une telle pompe sert notamment pour des produits liquides à vaporiser.Different types of pumps are known, each having particular characteristics, in order to function specifically, either with low-viscosity liquid products, or with viscous liquid products, such as creams or foams. Thus, there are pumps whose chamber is formed by a rigid body and a piston that closes the chamber, and whose movement in the body reduces or increases the volume of the chamber. The displacement of the piston is generally controlled by actuating the push-button. Such a pump is used especially for liquid products to vaporize.

Il existe d'autres pompes généralement destinées aux produits plus visqueux, dont la chambre est définie en grande partie par une membrane flexible, appelée aussi « soufflet ». Le volume de la chambre est contrôlé par déformation de la membrane. En configuration non déformée de la membrane, le volume de la chambre est maximal. Lorsque la membrane est déformée, le volume de la chambre diminue, de préférence jusqu'à un volume assez faible pour qu'un maximum de produit sorte de la chambre. De telles pompes ont en outre l'avantage d'éviter d'avoir recourt à un ressort en métal, les éléments de la pompe étant en matériau plastique.There are other pumps generally for more viscous products, whose chamber is defined in large part by a flexible membrane, also called "bellows". The volume of the chamber is controlled by deformation of the membrane. In undistorted configuration of the membrane, the volume of the chamber is maximum. When the membrane is deformed, the volume of the chamber decreases, preferably to a volume low enough that a maximum of product exits the chamber. Such pumps also have the advantage of avoiding having recourse to a metal spring, the elements of the pump being made of plastic material.

On connaît, par exemple, le document FR2804728 , qui décrit une pompe à membrane déformable munie de fentes comme orifices d'entrée et de sortie de la chambre de pompage. Dans cette pompe, la membrane a une forme particulière et elle est maintenue dans un compartiment pour contrôler la manière dont elle se plie et se déplie. En effet, on veut éviter que la membrane ne se déforme dans une configuration non souhaitée, ce qui risquerait de l'endommager et de nuire au bon fonctionnement de la pompe.We know, for example, the document FR2804728 which describes a deformable diaphragm pump with slots as inlet and outlet ports of the pumping chamber. In this pump, the membrane has a particular shape and is held in a compartment to control the manner in which it bends and unfolds. In fact, it is desired to prevent the membrane from deforming in an undesired configuration, which could damage it and impair the proper functioning of the pump.

Un autre document FR2915467 , montre une pompe avec une membrane ayant une forme de soufflet en forme d'accordéon. Le soufflet se plie et se déplie selon des lignes de pliage du soufflet. Cependant, la membrane est divisée en plusieurs parties accrochées d'une part au bouton poussoir et d'autre part dans le corps de la pompe. Une telle pompe est par conséquent difficile à assembler et donc complexe et couteuse à fabriquer.Another document FR2915467 , shows a pump with a diaphragm having an accordion-shaped bellows shape. The bellows folds and unfolds along fold lines of the bellows. However, the membrane is divided into several parts hooked on the one hand to the push button and on the other hand in the body of the pump. Such a pump is therefore difficult to assemble and therefore complex and expensive to manufacture.

L'invention vise à améliorer la situation en évitant les défauts précités, en fournissant une pompe munie d'une membrane déformable faite d'un seul tenant dont la déformation est guidée pour assurer un repliement optimal, sans devoir contraindre la membrane dans un compartiment ou lui donner une forme complexe.The aim of the invention is to improve the situation by avoiding the aforementioned defects by providing a pump provided with a deformable membrane made in one piece, the deformation of which is guided to ensure optimal folding, without having to constrain the membrane in a compartment or give it a complex shape.

Pour cela, l'invention concerne une pompe pour réceptacle, notamment un flacon destiné à contenir un produit cosmétique, ladite pompe comportant une chambre de pompage à volume variable définie au moins en partie par une membrane déformable, la pompe fonctionnant en faisant varier le volume de la chambre par déformation élastique de la membrane entre un état initial dans lequel la chambre a un volume maximal et un état déformé dans lequel le volume de la chambre est minimal, la chambre étant dotée d'un orifice d'entrée et d'un orifice de sortie du produit, la pompe comprenant un moyen de déformation de la membrane configuré pour exercer une pression sur la membrane, la pompe comportant en outre une tige de guidage traversant la membrane, la membrane glissant le long de la tige lorsqu'elle subit ladite déformation.For this, the invention relates to a pump for a receptacle, in particular a bottle intended to contain a cosmetic product, said pump comprising a variable volume pumping chamber defined at least in part by a deformable membrane, the pump operating by varying the volume of the chamber by elastic deformation of the membrane between an initial state in which the chamber has a maximum volume and a deformed state in which the volume of the chamber is minimal, the chamber being provided with an inlet and an outlet of the product, the pump comprising deformation means of the membrane configured to exert a pressure on the membrane, the pump further comprising a guide rod passing through the membrane, the membrane sliding along the rod when it undergoes said deformation.

Ainsi, l'invention permet de guider la membrane lorsqu'elle subit la déformation grâce à la tige de guidage, et d'éviter que la membrane ne se plie d'une manière dommageable pour la pompe. En effet, la membrane glisse le long de la tige lors de sa déformation de sorte que la membrane est retenue radialement par rapport à la tige, et elle se déplace seulement selon l'axe de la tige.Thus, the invention allows to guide the membrane when it undergoes deformation through the guide rod, and to prevent the membrane bends in a manner damaging to the pump. Indeed, the membrane slides along the rod during its deformation so that the membrane is retained radially relative to the rod, and it moves only along the axis of the rod.

Selon différents modes de réalisation de l'invention, qui pourront être pris ensemble ou séparément :

  • la membrane a une forme présentant un axe longitudinal dans l'état initial,
  • la tige est disposée sensiblement selon ledit axe longitudinal,
  • la membrane a une forme de dôme dans l'état initial,
  • la membrane est formée d'une seule matière élastique,
  • la membrane est formée de matériau polymère, par exemple en élastomère thermoplastique de type TPE,
  • le dôme comprend une base arrondie et un sommet,
  • l'axe longitudinal de la membrane passe sensiblement par le centre de la base et par le sommet du dôme,
  • la tige traverse le dôme de la base au sommet,
  • le dôme est configuré pour replier son sommet vers sa base,
  • la membrane comprend un appendice disposé au sommet du dôme,
  • le dôme définit le volume intérieur de la chambre de pompage,
  • la tige traverse l'appendice de sorte que l'appendice glisse le long de la tige lors de la déformation de la membrane,
  • le moyen de déformation est un conduit de distribution en contact avec la membrane,
  • le conduit coopère avec l'orifice de sortie de manière étanche pour recevoir le produit sortant de la chambre
  • la tige sort de l'appendice dans le conduit de distribution,
  • la tige comporte une tête de retenue de l'appendice,
  • le dôme est en légère contrainte élastique en position initiale,
  • la contrainte élastique du dôme permet de contraindre l'appendice contre la tige afin d'assurer l'étanchéité entre eux,
  • l'orifice de sortie est agencé sur la membrane,
  • l'orifice de sortie est agencé sur l'appendice,
  • l'orifice de sortie est une fente,
  • la membrane subit une force de friction contre la tige lors de la déformation de manière à provoquer l'ouverture de la fente,
  • la pompe comprend un manchon muni d'une paroi support sur laquelle repose au moins en partie la membrane déformable,
  • la tige de guidage s'étend dans le manchon depuis la paroi support,
  • la tige traverse axialement la chambre de pompage,
  • la pompe comprend un bouton-poussoir doté du conduit de distribution du produit,
  • le bouton-poussoir comprend une ouverture de sortie du produit en communication avec le conduit de distribution,
  • le bouton-poussoir est formé en matériau de type polypropylène,
  • le manchon comprend des moyens de guidage du bouton poussoir,
  • l'appendice est inséré dans le conduit de distribution,
  • l'appendice comprend une extrémité enserrant la tige de manière à créer ladite force de friction,
  • la paroi support comprend l'orifice d'entrée de la chambre,
  • l'orifice d'entrée est un trou traversant,
  • la membrane est munie d'une collerette recouvrant l'orifice d'entrée de manière à former un clapet d'entrée de la chambre,
  • ladite pompe comprend des moyens de maintien de la membrane sur la paroi support,
  • le manchon comprend un cylindre interne et un cylindre externe concentriques,
  • le manchon comprend un fond amovible portant ladite paroi support,
  • le cylindre interne comprend un cran de maintien de la membrane,
  • la membrane est munie d'un rebord agencé pour être bloquée par le cran de maintien,
  • le bouton-poussoir comprend un corps cylindrique configuré pour se déplacer entre les cylindres interne et externe du manchon,
  • le manchon comprend un tube plongeur destiné à être introduit dans le réservoir du réceptacle,
  • le tube plongeur débouche sur l'orifice d'entrée de la chambre.
According to various embodiments of the invention, which may be taken together or separately:
  • the membrane has a shape having a longitudinal axis in the initial state,
  • the rod is disposed substantially along said longitudinal axis,
  • the membrane has a dome shape in the initial state,
  • the membrane is formed of a single elastic material,
  • the membrane is formed of a polymeric material, for example a thermoplastic elastomer of the TPE type,
  • the dome has a rounded base and a top,
  • the longitudinal axis of the membrane passes substantially through the center of the base and the top of the dome,
  • the stem goes through the dome from the base to the top,
  • the dome is configured to fold its top towards its base,
  • the membrane comprises an appendage disposed at the top of the dome,
  • the dome defines the internal volume of the pumping chamber,
  • the stem passes through the appendage so that the appendage slides along the stem during the deformation of the membrane,
  • the deformation means is a distribution duct in contact with the membrane,
  • the duct cooperates with the outlet orifice in a sealed manner to receive the product leaving the chamber
  • the stem leaves the appendix in the distribution duct,
  • the stem has a retaining head of the appendix,
  • the dome is in slight elastic stress in the initial position,
  • the elastic constriction of the dome makes it possible to constrain the appendage against the stem in order to seal between them,
  • the outlet orifice is arranged on the membrane,
  • the outlet orifice is arranged on the appendix,
  • the outlet orifice is a slot,
  • the membrane is subjected to frictional force against the rod during deformation so as to open the slot,
  • the pump comprises a sleeve provided with a support wall on which at least partly rests the deformable membrane,
  • the guide rod extends into the sleeve from the support wall,
  • the rod passes axially through the pumping chamber,
  • the pump comprises a push button provided with the product distribution duct,
  • the push-button comprises an outlet opening of the product in communication with the distribution duct,
  • the push button is formed of polypropylene type material,
  • the sleeve comprises means for guiding the push button,
  • the appendix is inserted into the distribution duct,
  • the appendix comprises an end enclosing the rod so as to create said friction force,
  • the support wall comprises the inlet orifice of the chamber,
  • the inlet orifice is a through hole,
  • the membrane is provided with a flange covering the inlet orifice so as to form an inlet valve of the chamber,
  • said pump comprises means for holding the membrane on the support wall,
  • the sleeve comprises an inner cylinder and a concentric outer cylinder,
  • the sleeve comprises a removable bottom carrying said support wall,
  • the inner cylinder comprises a detent of the membrane,
  • the membrane is provided with a rim arranged to be blocked by the holding catch,
  • the push-button comprises a cylindrical body configured to move between the inner and outer cylinders of the sleeve,
  • the sleeve comprises a dip tube intended to be introduced into the reservoir of the receptacle,
  • the dip tube opens on the inlet port of the chamber.

L'invention concerne aussi un réceptacle, notamment un flacon pour produit cosmétique, comprenant une pompe telle que mentionnée précédemment.The invention also relates to a receptacle, in particular a bottle for a cosmetic product, comprising a pump as mentioned above.

L'invention sera mieux comprise à la lumière de la description suivante qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter, accompagnée des dessins joints :

  • les figures 1 (a) à 1 (c) illustrant de façon schématique, des vues en perspective des éléments d'une pompe selon un premier mode de réalisation de l'invention,
  • les figures 2(a) à 2(e) illustrant de façon schématique, des vues en coupe montrant le fonctionnement de la pompe sur un réceptacle selon le premier mode de réalisation,
  • les figures 3(a) et 3(b) illustrant de façon schématique, des vues en coupe agrandies montrant le glissement de la membrane contre la tige,
  • la figure 4 illustrant de façon schématique, une vue en coupe agrandie montrant le fonctionnement d'un clapet d'entrée de la chambre,
  • la figure 5 illustrant de façon schématique, une vue en perspective d'un manchon selon une variante du premier mode de réalisation de l'invention,
  • la figure 6 illustrant de façon schématique, une vue en coupe du manchon selon la variante du premier mode de réalisation,
  • la figure 7 illustrant de façon schématique, une vue en coupe d'une pompe selon un deuxième mode de réalisation de l'invention,
  • la figure 8 illustrant de façon schématique, un passage de reprise d'air du deuxième mode de réalisation.
The invention will be better understood in the light of the following description which is given for information only and which is not intended to limit it, accompanied by the attached drawings:
  • the Figures 1 (a) to 1 (c) schematically illustrating perspective views of the elements of a pump according to a first embodiment of the invention,
  • the Figures 2 (a) to 2 (e) schematically illustrating sectional views showing the operation of the pump on a receptacle according to the first embodiment,
  • the Figures 3 (a) and 3 (b) schematically illustrating enlarged sectional views showing the sliding of the membrane against the rod,
  • the figure 4 schematically illustrating an enlarged sectional view showing the operation of an inlet valve of the chamber,
  • the figure 5 schematically illustrating a perspective view of a sleeve according to a variant of the first embodiment of the invention,
  • the figure 6 illustrating schematically a sectional view of the sleeve according to the variant of the first embodiment,
  • the figure 7 illustrating schematically a sectional view of a pump according to a second embodiment of the invention,
  • the figure 8 schematically illustrating an air intake passage of the second embodiment.

L'invention concerne une pompe 1 pour réceptacle 10, notamment un flacon destiné à contenir un produit cosmétique. Dans un premier mode de réalisation représenté sur les figure 1 (a) à 1 (c), et les figures 2 et 3, la pompe comprend un bouton-poussoir 2 (figure 1 (a)), une membrane 3 déformable (figure 1 (b)) et un manchon 4 (figure 1 (c)). Le bouton-poussoir 2 a pour fonction de permettre l'actionnement de la pompe 1 par un utilisateur. Le bouton-poussoir 2 a ici un corps 5 cylindrique munie d'une ouverture 6 de distribution du produit et d'une paroi supérieure 7 d'appui sur laquelle l'utilisateur exerce une pression pour actionner la pompe 1, le bouton-poussoir 2 s'insérant dans le manchon 4 pendant l'actionnement. Le bouton-poussoir 2 est par exemple formé en matériau de type polypropylène.The invention relates to a pump 1 for receptacle 10, in particular a bottle intended to contain a cosmetic product. In a first embodiment shown on the Figure 1 (a) to 1 (c) , and the figures 2 and 3 , the pump comprises a push button 2 ( Figure 1 (a) ), a deformable membrane 3 ( Figure 1 (b) ) and a sleeve 4 ( Figure 1 (c) ). The pushbutton 2 has the function of allowing the actuation of the pump 1 by a user. The pushbutton 2 here has a cylindrical body 5 provided with an opening 6 for dispensing the product and an upper support wall 7 on which the user exerts a pressure to actuate the pump 1, the pushbutton 2 inserted into the sleeve 4 during actuation. The pushbutton 2 is for example formed of polypropylene type material.

La pompe comporte en outre une chambre 8 de pompage à volume variable définie au moins en partie par la membrane déformable 3. La pompe 1 fonctionne en faisant varier le volume de la chambre 8 par déformation élastique de la membrane entre un état initial représenté sur la figure 2 (a) dans lequel la chambre 8 a un volume maximal et un état déformé représenté sur la figure 2 (c) dans lequel le volume de la chambre 8 est minimal. La chambre 8 a une forme présentant un axe longitudinal à l'état initial, et a ici une forme de dôme 9 arrondi comprenant une base 11 circulaire et un sommet 12. L'axe longitudinal de la chambre 8 passe sensiblement par le centre de la base 11 et par le sommet 12 du dôme 9. La membrane 3 a en outre un appendice 13 surmontant le dôme 9, le volume intérieur du dôme 9 et de l'appendice 13 définissant la chambre 8 de pompage. La membrane 3 est ici formée d'une seule matière élastique, de préférence un matériau polymère, par exemple en élastomère thermoplastique de type TPE (pour « thermoplastic elastomer » en anglais). La membrane 3 est aussi munie à sa base 11 d'une collerette 14 interne, qui est destinée à positionner le dôme 9 dans le manchon 4 et à servir de clapet d'entrée de la chambre 8. L'axe longitudinal de la membrane 3 passe par le sommet 12 et l'appendice 13 et sensiblement par le centre de la base 11 du dôme 9. Un rebord 15 externe est agencé autour de la base 11 de la membrane 3, afin de servir de moyen de retenue de la membrane 3 dans le manchon 4.The pump further comprises a variable volume pumping chamber 8 defined at least in part by the deformable membrane 3. The pump 1 operates by varying the volume of the chamber 8 by elastic deformation of the membrane between an initial state represented on the Figure 2 (a) wherein the chamber 8 has a maximum volume and a deformed state represented on the Figure 2 (c) in which the volume of the chamber 8 is minimal. The chamber 8 has a shape having a longitudinal axis in the initial state, and here has a rounded dome shape 9 comprising a circular base 11 and an apex 12. The longitudinal axis of the chamber 8 passes substantially through the center of the base 11 and the top 12 of the dome 9. The membrane 3 further has an appendix 13 overlying the dome 9, the interior volume of the dome 9 and the appendix 13 defining the pumping chamber 8. The membrane 3 is here formed of a single elastic material, preferably a polymeric material, for example thermoplastic elastomer type TPE (for "thermoplastic elastomer" in English). The membrane 3 is also provided at its base 11 with an internal flange 14, which is intended to position the dome 9 in the sleeve 4 and serve as an inlet valve of the chamber 8. The longitudinal axis of the membrane 3 passes through the apex 12 and the appendix 13 and substantially through the center of the base 11 of the dome 9. An outer rim 15 is arranged around the base 11 of the membrane 3, to serve as a means of retaining the membrane 3 in the sleeve 4.

Sur la figure 1(c), le manchon 4 comprend un cylindre interne 16 et un cylindre externe 17 sensiblement concentriques, qui servent de moyens de guidage du bouton-poussoir 2. Ainsi, le corps 5 du bouton-poussoir peut se déplacer entre le cylindre interne 16 et le cylindre externe 17. Le manchon 4 est de plus doté de moyens de couplage 18 avec le réceptacle 10, avec par exemple un système d'encliquetage comme montré sur les figures 2 (a) à (e). Le système d'encliquetage est ici une bague agencée sur le manchon 4 et une contre-bague agencée sur le réceptacle 10, la bague étant encliquetée sous la contre-bague.On the Figure 1 (c) , the sleeve 4 comprises an inner cylinder 16 and an outer cylinder 17 substantially concentric, which serve as guide means of the pushbutton 2. Thus, the body 5 of the pushbutton can move between the inner cylinder 16 and the outer cylinder 17. The sleeve 4 is furthermore provided with coupling means 18 with the receptacle 10, for example with a snap-in system as shown in FIGS. Figures 2 (a) to (e) . The latching system is here a ring arranged on the sleeve 4 and a counter-ring arranged on the receptacle 10, the ring being snapped under the counter-ring.

Le manchon 4 est en outre muni d'une paroi support 19 sur laquelle la membrane déformable 3 repose au moins en partie. Ici, la base 11 du dôme 9 et la collerette 14 interne sont en contact avec la paroi support 19. Le cylindre interne 16 comprend de plus un cran 21 de maintien agencé sur la face interne du cylindre interne 16, de manière à bloquer la membrane 3 contre la paroi support 19. Le cran 21 retient le rebord 15 externe du dôme 9. La paroi support 19 du manchon 4 comporte aussi un trou 22 traversant qui définit un orifice d'entrée de la chambre 8 de pompage. Le trou 22 est recouvert par la collerette interne 14 de la membrane lorsque la membrane 3 est insérée dans le manchon 4, de manière à former un clapet d'entrée de la chambre 8. La collerette 14 est également élastique car fait du même matériau que la membrane 3. Ainsi, la collerette 14 peut se soulever pour laisser le produit entrer dans la chambre 8.The sleeve 4 is further provided with a support wall 19 on which the deformable membrane 3 rests at least in part. Here, the base 11 of the dome 9 and the inner flange 14 are in contact with the support wall 19. The inner cylinder 16 further comprises a retaining catch 21 arranged on the internal face of the inner cylinder 16, so as to block the membrane 3 against the support wall 19. The notch 21 retains the outer rim 15 of the dome 9. The support wall 19 of the sleeve 4 also comprises a through hole 22 which defines an inlet port of the pumping chamber 8. The hole 22 is covered by the internal flange 14 of the membrane when the membrane 3 is inserted into the sleeve 4, so as to form an inlet valve of the chamber 8. The flange 14 is also elastic because it is made of the same material as the membrane 3. Thus, the collar 14 can lift to let the product enter the chamber 8.

Une variante de réalisation d'un manchon 40 est représentée sur les figures 5 et 6. Ce manchon 40 est pourvu d'un fond amovible 41, et comprend notamment la paroi support 19 et la tige 20. L'élément 42, qui définit l'autre partie du manchon 40, et le fond 41 sont agencés pour pouvoir être assemblés. A cette fin, le fond 41 comprend une nervure 43 circonférentielle qui est bloquée par un cran d'encliquetage 44 disposé à l'intérieur de l'élément 42, ainsi que cela est représenté sur la figure 6.An alternative embodiment of a sleeve 40 is shown on the figures 5 and 6 . This sleeve 40 is provided with a removable bottom 41, and comprises in particular the support wall 19 and the rod 20. The element 42, which defines the other part of the sleeve 40, and the bottom 41 are arranged to be assembled. For this purpose, the bottom 41 comprises a circumferential rib 43 which is locked by a detent 44 disposed inside the element 42, as shown in FIG. figure 6 .

Pour déformer la membrane 3, la pompe 1 comprend un moyen de déformation disposé à l'extérieur de la chambre 8 et configuré pour exercer une pression sur la membrane 3 lorsque le bouton-poussoir 2 est actionné. Comme le montrent les figures 2 et 3, le moyen de déformation est un conduit de distribution 23 ayant une extrémité ouverte 26 en contact avec la membrane 3. Le conduit de distribution 23 fait ici partie du bouton-poussoir 2, le conduit s'étendant à l'intérieur du bouton-poussoir 2 depuis la face interne de la paroi supérieure 7. Le conduit de distribution 23 a pour fonction d'amener le produit sortant de la chambre 8 de pompage jusqu'à l'ouverture 6 du bouton-poussoir 2. Le conduit de distribution 23 est en contact étanche avec la membrane 3. Pour cela, l'appendice 13 est inséré dans le conduit de distribution 23, le conduit 23 reposant sur le dôme 9 de la membrane 3. L'appendice 13 est en outre muni d'un bourrelet 24 externe qui permet d'une part de le bloquer dans le conduit 23 et d'autre part d'assurer l'étanchéité du contact avec le conduit de distribution 23. Le bourrelet 24 fait le tour de l'appendice 13, ici à la jonction du dôme 9, et est dimensionné sensiblement aux dimensions de l'extrémité ouverte 26 du conduit de distribution 23.To deform the membrane 3, the pump 1 comprises a deformation means disposed outside the chamber 8 and configured to exert pressure on the membrane 3 when the pushbutton 2 is actuated. As shown by figures 2 and 3 the deformation means is a distribution duct 23 having an open end 26 in contact with the membrane 3. The dispensing duct 23 is part of the push-button 2, the duct extending inside the push-button 2 from the inner face of the upper wall 7. The function of the distribution duct 23 is to bring the product leaving the pumping chamber 8 to the opening 6 of the push-button 2. The dispensing duct 23 is In this case, the appendix 13 is inserted into the distribution duct 23, the duct 23 resting on the dome 9 of the membrane 3. The appendix 13 is further provided with a bead 24 external which allows on the one hand to block it in the conduit 23 and on the other hand to ensure the sealing of the contact with the distribution conduit 23. The bead 24 is around the appendix 13, here at the junction of the dome 9, and is dimensioned substantially to the dimensions of the open end 26 of the distribution duct 23.

La chambre 8 comprend de plus un orifice de sortie du produit, l'orifice de sortie étant agencé sur la membrane 3, de préférence sur l'appendice 13. L'orifice de sortie est ici une fente 25 qui s'ouvre lorsque la chambre 8 de pompage se déforme. Le conduit de distribution 23 coopère avec la fente 25 pour recevoir le produit sortant de la chambre 8. La fente 25 est disposée dans le conduit de distribution 23 au-delà du bourrelet 24. Ainsi, lorsque le produit sort de la fente 25 dans le conduit de distribution 23, le produit est guidé dans le conduit de distribution 23.The chamber 8 further comprises an outlet of the product, the outlet orifice being arranged on the membrane 3, preferably on the appendix 13. The outlet orifice is here a slot 25 which opens when the chamber 8 pumping deforms. The distribution duct 23 cooperates with the slot 25 to receive the product leaving the chamber 8. The slot 25 is disposed in the distribution duct 23 beyond the bead 24. Thus, when the product leaves the slot 25 in the distribution duct 23, the product is guided in the distribution duct 23.

Selon l'invention, le manchon 4 est pourvu d'une tige 20 de guidage de la membrane 3, qui s'étend depuis la paroi support 19 du manchon 4. La tige 20 est disposée sensiblement selon l'axe des cylindres 16, 17 du manchon 4. La tige 20 de guidage traverse la membrane, de sorte que la membrane 3 glisse le long de la tige 20 lorsqu'elle subit ladite déformation, la tige 20 traversant la chambre 8 sensiblement selon l'axe longitudinal de la chambre 8. Ici, la tige 20 traverse le somment 12 du dôme 9 depuis sa base 11, ainsi que l'appendice 13, la tige sortant de l'appendice 13 dans le conduit de distribution 23. Le sommet 12 du dôme 9 et l'appendice 13 ont ainsi un canal traversant qui permet à la tige 20 de passer à travers la membrane 3.According to the invention, the sleeve 4 is provided with a rod 20 for guiding the membrane 3, which extends from the support wall 19 of the sleeve 4. The rod 20 is disposed substantially along the axis of the cylinders 16, 17 the sleeve 4. The guide rod 20 passes through the membrane, so that the membrane 3 slides along the rod 20 when it undergoes said deformation, the rod 20 passing through the chamber 8 substantially along the longitudinal axis of the chamber 8 Here, the rod 20 passes through the top 12 of the dome 9 from its base 11, as well as the appendix 13, the stem coming out of the appendix 13 into the distribution duct 23. The top 12 of the dome 9 and the appendix 13 and have a through channel that allows the rod 20 to pass through the membrane 3.

La tige 20 a pour fonction de guider la membrane 3 lorsqu'elle passe de l'état initial à l'état déformé, puis de l'état déformé à l'état initial. Le dôme 9 est ainsi configuré pour pouvoir replier son sommet 12 vers sa base 11, l'appendice 13 de la membrane 3 se déplaçant également vers la base 11 du dôme 9, le long de la tige 20.The rod 20 serves to guide the membrane 3 when it goes from the initial state to the deformed state, and then from the deformed state to the initial state. The dome 9 is thus configured to be able to fold its vertex 12 towards its base 11, the appendage 13 of the membrane 3 also moving towards the base 11 of the dome 9, along the rod 20.

Pour que la fente 25, qui est fermée dans l'état initial (figure 3(a)), s'ouvre, l'appendice 13 comprend une extrémité 27 en contact serré autour de la tige 20. La tige comporte une tête de retenue 30 qui appuie sur l'extrémité 27 de l'appendice 13 en position initiale, de manière à provoquer une légère contrainte élastique du dôme. La contrainte élastique permet de contraindre l'extrémité 27 de l'appendice 13 contre la tige 20 afin d'assurer l'étanchéité entre eux.For the slot 25, which is closed in the initial state ( Figure 3 (a) ), opens, the appendix 13 comprises an end 27 in close contact around the rod 20. The rod comprises a retaining head 30 which presses on the end 27 of the appendix 13 in the initial position, so as to cause a slight elastic stress of the dome. The elastic stress makes it possible to constrain the end 27 of the appendage 13 against the rod 20 in order to seal between them.

D'autre part, l'extrémité 27 de l'appendice 13 subit une friction contre la tige 20 lors du glissement de l'appendice 13 contre la tige 20, de manière à étirer légèrement l'appendice 13 et provoquer ainsi l'ouverture de la fente 25, tel que le représente la figure 3(b). Grâce à ce système de fonctionnement, l'invention permet d'ouvrir la fente 25 de sortie du produit, sans nécessiter de surpression dans la chambre de pompage. En effet, les pompes à membranes munies de fente de sortie connues fonctionnent en produisant une surpression à l'intérieur de la chambre, donc du produit cosmétique, pour provoquer l'ouverture de la fente. Or cette surpression risque d'endommager le produit, en provoquant par exemple un déphasage, ou bien la membrane, en accélérant son usure.On the other hand, the end 27 of the appendix 13 is friction against the rod 20 during the sliding of the appendix 13 against the rod 20, so as to slightly stretch the appendix 13 and thus cause the opening of the slot 25, as represented by the Figure 3 (b) . Thanks to this operating system, the invention makes it possible to open the outlet slit 25 of the product without requiring overpressure in the pumping chamber. Indeed, diaphragm pumps provided with a known exit slot operate by producing an overpressure inside the chamber, and therefore the cosmetic product, to cause the opening of the slot. But this overpressure may damage the product, causing for example a phase shift, or the membrane, accelerating its wear.

Sur les figures 2(a) à 2(c), lorsque la membrane 3 subit la déformation, la membrane 3 glisse le long de la tige 20 en se repliant, de sorte que le volume de la chambre diminue. La figure 2(a) montre la pompe 1 dans l'état initial, dans lequel la chambre 8 a son volume maximal. Lorsque le bouton-poussoir 2 est enfoncé par l'utilisateur, le conduit de distribution 23 appuie sur le dôme 9 qui commence à se déformer comme représenté sur la figure 2(a). Le haut du dôme 9 s'aplatit, tandis que la fente 25 s'ouvre. Ici, le dôme 9 se replie d'abord en s'abaissant vers la base 11, l'appendice 13 et la partie centrale du dôme 9 sur laquelle le tube de distribution 23 exerce une pression. Le produit contenu dans la chambre 8 commence à être expulsé par la fente 25. Sur la figure 2(c), le bouton-poussoir 2 est complètement enfoncé dans le manchon 4, ce qui provoque le repliement de la partie périphérique du dôme 9 en formant une couronne circulaire. La couronne est formée par deux couches de membrane repliées l'une contre l'autre et formant un coude. La chambre 8 atteint ainsi un volume minimal, de préférence le plus petit possible, pour que le maximum de produit sorte par la fente 25.On the Figures 2 (a) to 2 (c) when the membrane 3 undergoes deformation, the membrane 3 slides along the rod 20 by folding, so that the volume of the chamber decreases. The Figure 2 (a) shows the pump 1 in the initial state, in which the chamber 8 has its maximum volume. When the push button 2 is depressed by the user, the dispensing duct 23 presses on the dome 9 which begins to deform as shown in FIG. Figure 2 (a) . The top of the dome 9 flattens, while the slot 25 opens. Here, the dome 9 folds first by lowering towards the base 11, the appendix 13 and the central portion of the dome 9 on which the distribution tube 23 exerts a pressure. The product contained in the chamber 8 begins to be expelled by the slot 25. On the Figure 2 (c) , the pushbutton 2 is fully depressed in the sleeve 4, which causes the folding of the peripheral portion of the dome 9 by forming a circular ring. The crown is formed by two membrane layers folded against each other and forming a bend. Chamber 8 thus reaches a minimum volume of preferably the smallest possible, so that the maximum of product leaves by the slot 25.

Ainsi, grâce à la tige 20, la membrane 3 reste centrée autour de l'axe longitudinal du manchon 4. On évite ainsi le risque d'un repliement mal contrôlé de la membrane 3.Thus, thanks to the rod 20, the membrane 3 remains centered around the longitudinal axis of the sleeve 4. This avoids the risk of poorly controlled folding of the membrane 3.

Les figures 2(d) et 2(e) montrent la déformation inverse de la membrane, de la configuration déformée à la configuration initiale. Lorsque le bouton-poussoir 2 n'est plus maintenu enfoncé par l'utilisateur, alors que la membrane est fortement déformée, le volume de la chambre est minimal et la membrane exerce une force de pression contre le conduit de distribution 23, cette force étant due au caractère élastique de la membrane 3 qui tend à retrouver sa forme initiale. Le bouton-poussoir 2 est ainsi repoussé vers l'extérieure du manchon 4 de manière télescopique. L'appendice 13 glisse le long de la tige 20 en sens inverse, ce qui referme la fente 25 à cause de la friction qui est due à l'extrémité 27 serrée autour de la tige 20. La chambre 8 étant fermée, une dépression est créée à l'intérieur de la chambre 8 car son volume augmente sans aspirer d'air.The Figures 2 (d) and 2 (e) show the inverse deformation of the membrane, from the deformed configuration to the initial configuration. When the push button 2 is no longer held down by the user, while the membrane is highly deformed, the volume of the chamber is minimal and the membrane exerts a pressure force against the distribution duct 23, this force being due to the elastic nature of the membrane 3 which tends to return to its original shape. The push-button 2 is thus pushed towards the outside of the sleeve 4 in a telescopic manner. The appendix 13 slides along the rod 20 in the opposite direction, which closes the slot 25 because of the friction which is due to the end 27 clamped around the rod 20. The chamber 8 being closed, a depression is created inside the chamber 8 because its volume increases without sucking air.

La dépression créée dans la chambre 8 force, d'une part, la collerette 14 du clapet d'entrée à se soulever, et provoque d'autre part, l'aspiration du produit dans la chambre à partir du réservoir du réceptacle, comme cela est représenté sur la figure 4. Lorsque la collerette 14 se soulève, le trou 22 est ouvert et met en communication la chambre 8 avec le réservoir du réceptacle. Le produit est ainsi aspiré par le trou 22 dans la chambre 8 pendant que le dôme 9 reprend sa forme initiale. Quand la membrane 3 a repris complètement sa forme initiale, la chambre 8 est rechargée en produit à distribuer, de sorte que la pompe 1 est à nouveau utilisable.The depression created in the chamber 8 forces, on the one hand, the flange 14 of the inlet valve to be lifted, and on the other hand causes the suction of the product into the chamber from the receptacle reservoir, like this is represented on the figure 4 . When the flange 14 is raised, the hole 22 is open and communicates the chamber 8 with the reservoir of the receptacle. The product is thus sucked through the hole 22 in the chamber 8 while the dome 9 returns to its original shape. When the membrane 3 has completely returned to its original shape, the chamber 8 is reloaded with the product to be dispensed, so that the pump 1 is again usable.

Dans le premier mode de réalisation, le réceptacle ne récupère pas d'air extérieur dans le réservoir pour compenser la sortie du produit hors de la chambre. Le réceptacle est, de préférence, pourvu d'un réservoir à volume variable, qui diminue au fur et à mesure que le produit est distribué. Ainsi, le produit est toujours à proximité de l'orifice d'entrée pour être aspiré dans la chambre.In the first embodiment, the receptacle does not collect outside air in the reservoir to compensate for the product exit from the chamber. The receptacle is preferably provided with a variable volume reservoir, which decreases as the product is dispensed. Thus, the product is always near the inlet to be sucked into the chamber.

Dans un deuxième mode de réalisation, représenté sur les figures 7 et 8, le manchon 40 comprend de plus un tube plongeur 28, le manchon 40 ayant sur ces figures un fond 41 amovible auquel est relié le tube plongeur 28. Le tube 28 est destiné à être plongé dans le réservoir du réceptacle 10, lorsque la pompe 1 est montée sur le réceptacle 10. Le tube 28 débouche dans la paroi support 19 du manchon 40 au niveau du trou 22 de l'orifice d'entrée de la chambre 8. Ainsi, lorsque la pompe 1 a été déclenchée, le produit monte dans le tube 28 par aspiration pour remplir à nouveau la chambre 8 de pompage.In a second embodiment, shown in the Figures 7 and 8 , the sleeve 40 further comprises a dip tube 28, the sleeve 40 having in these figures a bottom 41 to which is connected the removable tube 28. The tube 28 is intended to be immersed in the tank of the receptacle 10, when the pump 1 is mounted on the receptacle 10. The tube 28 opens into the support wall 19 of the sleeve 40 at the hole 22 of the inlet of the chamber 8. Thus, when the pump 1 has been triggered, the product rises in the tube 28 by suction to refill the chamber 8 pumping.

La pompe 1 comprend de plus un passage de reprise d'air pour permettre de compenser la dépression dans le réservoir induite par la montée du produit du réservoir du réceptacle dans la chambre. Comme le montre la figure 8, le passage de reprise d'air, qui est représenté par une flèche venant de l'extérieur de la pompe 1 dans le réservoir, passe d'abord entre le cylindre externe 17 du manchon 40 et le corps cylindrique 5 du bouton-poussoir 2, puis remonte entre le corps cylindrique 5 du bouton-poussoir et le cylindre interne 16 du manchon 40. Le passage redescend ensuite dans le cylindre interne 16 du manchon 40 et passe par une ouverture 29 agencée dans le fond 41 du manchon 40, l'ouverture 29 débouchant dans le réservoir. Ainsi, l'air circule par ce passage pour apporter de l'air dans le réservoir.The pump 1 further comprises a return air passage to compensate for the depression in the tank induced by the rise of the product of the tank of the receptacle in the chamber. As shown in figure 8 , the air intake passage, which is represented by an arrow coming from the outside of the pump 1 in the reservoir, passes first between the outer cylinder 17 of the sleeve 40 and the cylindrical body 5 of the pushbutton 2 and then goes back up between the cylindrical body 5 of the push-button and the inner cylinder 16 of the sleeve 40. The passage then descends back into the inner cylinder 16 of the sleeve 40 and passes through an opening 29 arranged in the bottom 41 of the sleeve 40, opening 29 opening into the tank. Thus, the air circulates through this passage to bring air into the tank.

Dans ce mode de réalisation, le rebord externe de la base de la membrane 3 est prolongé contre le cylindre interne 16 du manchon 40 afin de former un clapet de reprise d'air, au-dessus de l'ouverture. Le clapet de reprise d'air ferme l'ouverture 29 en position initiale et est replié vers le bas du manchon 40. Lorsqu'une dépression est créée à l'intérieur du réservoir suite à l'actionnement de la pompe, le clapet se déplace comme le montre la petite flèche blanche sur la figure 8, de sorte que l'air peut rentrer dans le réservoir par l'ouverture 29. Lorsque la dépression est comblée, le clapet retrouve sa forme initiale grâce à l'élasticité de la membrane, et empêche ainsi l'air d'entrer ou le produit de sortir du réservoir.In this embodiment, the outer rim of the base of the membrane 3 is extended against the inner cylinder 16 of the sleeve 40 so that to form an air intake valve, above the opening. The air intake valve closes the opening 29 in the initial position and is folded downwardly of the sleeve 40. When a vacuum is created inside the tank following the actuation of the pump, the valve moves as shown by the small white arrow on the figure 8 , so that the air can enter the tank through the opening 29. When the vacuum is filled, the valve returns to its original shape thanks to the elasticity of the membrane, and thus prevents air from entering or product to come out of the tank.

Claims (15)

Pompe pour réceptacle (10), notamment un flacon destiné à contenir un produit cosmétique, ladite pompe (1) comportant une chambre (8) de pompage à volume variable définie au moins en partie par une membrane (3) déformable, la pompe (1) fonctionnant en faisant varier le volume de la chambre (8) par déformation élastique de la membrane (3) entre un état initial dans lequel la chambre (8) a un volume maximal et un état déformé dans lequel le volume de la chambre (8) est minimal, la chambre (3) étant dotée d'un orifice d'entrée et d'un orifice de sortie du produit, la pompe (1) comprenant un moyen de déformation de la membrane configuré pour exercer une pression sur la membrane (3), la pompe comportant en outre une tige (20) de guidage traversant la membrane (3), la membrane (3) glissant le long de la tige (20) lorsqu'elle subit ladite déformation.Pump for a receptacle (10), in particular a bottle intended to contain a cosmetic product, said pump (1) comprising a variable volume pumping chamber (8) defined at least in part by a deformable membrane (3), the pump (1 ) operating by varying the volume of the chamber (8) by elastic deformation of the membrane (3) between an initial state in which the chamber (8) has a maximum volume and a deformed state in which the volume of the chamber (8) ) is minimal, the chamber (3) being provided with an inlet and an outlet of the product, the pump (1) comprising a deformation means of the membrane configured to exert a pressure on the membrane ( 3), the pump further comprising a guide rod (20) passing through the membrane (3), the membrane (3) sliding along the rod (20) when it undergoes said deformation. Pompe selon la revendication 1, dans laquelle la membrane (3) a une forme présentant dans l'état initial un axe longitudinal, la tige (20) étant disposée sensiblement selon ledit axe longitudinal.Pump according to claim 1, wherein the membrane (3) has a shape having in the initial state a longitudinal axis, the rod (20) being disposed substantially along said longitudinal axis. Pompe selon la revendication 1 ou 2, dans laquelle la membrane (3) a une forme de dôme (9) dans l'état initial.Pump according to claim 1 or 2, wherein the diaphragm (3) has a dome shape (9) in the initial state. Pompe selon la revendication 3, dans laquelle la membrane comprend un appendice (13) disposé au sommet du dôme (9), la tige (20) traversant l'appendice de sorte que l'appendice glisse le long de la tige lors de la déformation de la membrane (3).Pump according to claim 3, wherein the membrane comprises an appendage (13) disposed at the top of the dome (9), the rod (20) passing through the appendix so that the appendage slides along the rod during the deformation of the membrane (3). Pompe selon la revendication précédente, dans laquelle l'orifice de sortie est agencé sur l'appendice (13).Pump according to the preceding claim, wherein the outlet orifice is arranged on the appendix (13). Pompe selon la revendication précédente, dans laquelle l'orifice de sortie est une fente (25).Pump according to the preceding claim, wherein the outlet orifice is a slot (25). Pompe selon la revendication précédente, dans laquelle la membrane (3) subit une force de friction contre la tige (20) lors de la déformation de manière à provoquer l'ouverture de la fente (25).Pump according to the preceding claim, wherein the membrane (3) undergoes a frictional force against the rod (20) during deformation so as to cause the opening of the slot (25). Pompe selon la revendication précédente, dans laquelle l'appendice (13) comprend une extrémité (27) enserrant la tige (20) de manière à créer ladite force de friction.Pump according to the preceding claim, wherein the appendix (13) comprises an end (27) enclosing the rod (20) so as to create said friction force. Pompe selon l'une quelconque des revendications 4 à 8, dans laquelle le moyen de déformation est un conduit de distribution (23) du produit en contact avec la membrane (3), le conduit (23) coopérant avec l'orifice de sortie de manière étanche pour recevoir le produit sortant de la chambre (8).Pump according to any one of claims 4 to 8, wherein the deformation means is a distribution duct (23) of the product in contact with the membrane (3), the duct (23) cooperating with the outlet orifice of sealed way to receive the product leaving the chamber (8). Pompe selon la revendication précédente, dans laquelle l'appendice (13) est inséré dans le conduit de distribution (23).Pump according to the preceding claim, wherein the appendix (13) is inserted into the distribution duct (23). Pompe selon la revendication précédente, comprenant un bouton poussoir (2) muni du conduit de distribution (23) du produit, le bouton poussoir (2) comprenant une ouverture de distribution (6) du produit en communication avec ledit conduit de distribution (23).Pump according to the preceding claim, comprising a push button (2) provided with the dispensing duct (23) of the product, the push button (2) comprising a dispensing opening (6) of the product in communication with said dispensing duct (23) . Pompe selon l'une quelconque des revendications précédentes, comprenant un manchon (4) muni d'une paroi support (19) sur laquelle repose au moins en partie la membrane déformable (3), la tige de guidage (20) s'étendant depuis ladite paroi support (19).Pump according to any one of the preceding claims, comprising a sleeve (4) provided with a support wall (19) on which at least partly rests the deformable membrane (3), the guide rod (20) extending from said support wall (19). Pompe selon la revendication précédente, dans laquelle la paroi support (19) comprend l'orifice d'entrée de la chambre (8), la membrane (3) étant munie d'une collerette (14) recouvrant l'orifice d'entrée de manière à former un clapet d'entrée de la chambre (8).Pump according to the preceding claim, wherein the support wall (19) comprises the inlet orifice of the chamber (8), the membrane (3) being provided with a flange (14) covering the inlet orifice so as to form an inlet valve of the chamber (8). Pompe selon l'une quelconque des revendications 12 ou 13, comprenant des moyens de maintien de la membrane (3) sur la paroi support (19).Pump according to any one of claims 12 or 13, comprising means for holding the membrane (3) on the support wall (19). Réceptacle (10), notamment pour produit cosmétique, comprenant une pompe (1) selon l'une quelconque des revendications précédentes.Receptacle (10), in particular for a cosmetic product, comprising a pump (1) according to any one of the preceding claims.
EP17154357.2A 2016-02-25 2017-02-02 Pump for a receptacle, in particular a bottle for a cosmetic product, and a dispensing device comprising such a pump Active EP3210672B1 (en)

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FR1651581A FR3048192B1 (en) 2016-02-25 2016-02-25 PUMP FOR RECEPTACLE, IN PARTICULAR A BOTTLE OF COSMETIC PRODUCT, AND DISTRIBUTION DEVICE INCLUDING SUCH A PUMP

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CN107114900B (en) 2021-10-15
FR3048192A1 (en) 2017-09-01
US20170246648A1 (en) 2017-08-31
US10525493B2 (en) 2020-01-07
BR102017002831A2 (en) 2017-12-26
FR3048192B1 (en) 2020-10-23
CN107114900A (en) 2017-09-01
EP3210672B1 (en) 2021-05-12

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