Skin treatment device

Abstract

A device (1) for treating a user's skin by iontophoresis and / or electrostimulation intended to be applied to the user's skin, the device (1) comprising: - a support layer (2) comprising a support film (21) and having an active face (25) intended to be in contact with the skin, the active face (25) comprising a main electrode (22) and a counter electrode (23), - a current generator (24) electrically connected to the main electrode (22) on the one hand and to the counter electrode (23) on the other hand, the current generator (24) comprising at least one galvanic couple (240), the galvanic couple (240) being formed of a first conductive pole (241) forming the cathode and a second conductive pole (242) forming the anode, the support layer (2) comprising at least a first part of the current generator (24),the first conducting pole (241) and the second conducting pole (242) being arranged at a distance and separated from each other and being intended to be positioned opposite each other for the establishment of an electrical connection between them by means of an electrically conductive activating agent. Figure for the abbreviation: Fig. 1.

Description

Title of the invention: Skin treatment device FIELD OF THE INVENTION

[0001] The present invention relates to the field of skin treatment. More specifically, the present invention relates to a device for skin treatment, in particular by iontophoresis and / or electroporation and / or electrostimulation, preferably non-therapeutic. STATE OF THE ART

[0002] Iontophoresis, electroporation or electrostimulation can be used to treat the skin from electric currents. Skin treatment devices such as facial care masks are known, designed to deliver an electric current to a user's face. These devices typically include a polymer support matrix on which current generators are arranged. However, the effectiveness of these masks is limited or even very low, particularly due to short circuits that can occur between the current generators and the matrix and / or between the current generators and the skin. The electric currents are therefore not correctly delivered to the user's skin, whether in terms of intensity and / or location. Treatment by iontophoresis and / or electrostimulation is therefore not optimal, and the effectiveness of known devices is disappointing. In addition, it is generally complex to use these masks.In addition, these devices may potentially present a risk of migration of components, and in particular metals, forming the current generators towards the skin, which could lead to unexpected reactions from the skin. Statement of the invention

[0003] An aim of the invention is to improve the operation of devices for treating the skin by iontophoresis or electrostimulation, in particular to improve their effectiveness.

[0004] Another aim of the invention is to make the use of devices for treating the skin by iontophoresis or electrostimulation easier and more accessible to all.

[0005] Another object of the invention is to improve the storage and durability of devices for treating the skin by iontophoresis or electrostimulation.

[0006] Another aim of the invention is to propose a skin treatment device which is particularly ergonomic and intuitive to use.

[0007] According to a first aspect, there is provided a device for treating the skin of a user by iontophoresis and / or electrostimulation intended to be applied to the skin of the user, the device comprising: - a support layer comprising a support film and having an active face intended for be opposite the skin, the active face comprising a main electrode and a counter-electrode, - a current generator electrically connected to the main electrode on the one hand and to the counter-electrode on the other hand, the current generator comprising at least one galvanic couple, the galvanic couple being formed of a first conductive pole forming a cathode and a second conductive pole forming an anode, the support layer comprising at least a first part of the current generator, the first conductive pole and the second conductive pole being arranged at a distance and separated from each other and being intended to be arranged opposite each other for establishing an electrical connection between them by means of an electrically conductive activation product. The current generator being folded back on itself, any contact, direct or indirect, between the skin and the current generator is avoided, thus preventing the migration of components of the current generator towards the skin and short circuits via the skin.Furthermore, the current generator being folded back on itself, this allows, for an equivalent surface area, to multiply the number of galvanic couples in contact with each other and therefore to increase the current intensity produced by the device and thus its treatment efficiency.

[0008] According to advantageous and non-limiting characteristics, taken alone or in any combination: - the support layer comprises at least one galvanic couple, the support film being adapted to be folded so that the first conductive pole and the second conductive pole of said galvanic couple are arranged opposite each other for establishing the electrical connection so that, when the device is applied to the user's skin, the current generator is not in contact with the skin; - the galvanic couple(s) are arranged on the active face of the support layer, the support film comprising a primary fold line which divides the support film into two parts and being intended to be folded along the primary fold line and, wherein, for each galvanic couple, one of the first conductive pole and the second conductive pole is arranged on one side of the primary fold line and the other of the first conductive pole and the second conductive pole is arranged on the other side of the primary fold line, the fold line thus facilitating the use and intuitiveness of the device 1; - the galvanic couples are connected in series, the first conductive pole of one of the galvanic couples being electrically connected to the second conductive pole of an adjacent galvanic couple, said two conductive poles being arranged on the same side of the primary fold line; the first conductive pole of a galvanic couple is connected to the second conductive pole of an adjacent galvanic couple on one side of the primary fold line and the second conductive pole of the galvanic couple is connected to a first conductive pole of another adjacent galvanic couple on the other side of the primary fold line; the device comprises one or more adhesive films intended to be arranged on the support film on one side and / or on the other side of the primary fold line so as to, when the support film is folded along the primary fold line, maintain the electrical connection between the first conductive pole and the second conductive pole; the support film comprises a secondary fold line arranged between the current generator and the main electrode and is intended to be folded along the secondary fold line; the support film comprises a tertiary fold line arranged between the current generator and the counter electrode and is intended to be folded along the tertiary fold line, the secondary and tertiary fold lines thus contributing to the ease and intuitiveness of use of the device; the device comprises a tab comprising a protective film and comprising a second part of the current generator arranged on the first face, different from the first part of the current generator, the first part comprising one of the first conductive pole and the second conductive pole of each galvanic couple and the second part comprising the other of the first conductive pole and the second conductive pole of each galvanic couple, each first conductive pole or second conductive pole of the second part being provided so that, when the protective film of the tab covers the first part, preferably without covering the main electrode and the counter-electrode, it is arranged opposite the first conductive pole or second conductive pole of the first part belonging to the corresponding galvanic couple,which makes it possible to increase the intensity of the electric current generated by the current generator and thus increase the efficiency of the device; the current generator comprises a plurality of galvanic couples comprising a first galvanic couple and a last galvanic couple, the first conductive pole of the first galvanic couple being electrically connected to the main electrode and the second conductive pole of the last galvanic couple being electrically connected to the counter electrode, or the second conductive pole of the first galvanic couple being electrically connected to the main electrode and the first conductive pole of the last galvanic couple being electrically connected to the counter-electrode, the conductive poles connected respectively to the electrode and to the counter-electrode being included in the first part of the current generator arranged on the active face of the support layer, the galvanic couples being connected in series, two conductive poles of different adjacent and electrically connected galvanic couples both belonging either to the first part of the current generator or to the second part of the current generator; - the main electrode and the counter electrode are made of silver and / or silver chloride, each first conductive pole forming a cathode comprises silver and / or silver chloride and each second conductive pole forming anode comprises zinc.

[0009] According to a second aspect, there is provided a method of using a device described above comprising steps of: (a) applying an electrically conductive activation product to the device; b) folding the support film of the support layer or the protective film of the tab so that the first part of the current generator is arranged opposite the second part of the current generator; c) applying the device to the skin of a user so that the main electrode and the counter electrode are arranged opposite the user's skin. DESCRIPTION OF THE FIGURES

[0010] Other characteristics and advantages of the present invention will appear on reading the following description of a preferred embodiment. This description will be given with reference to the appended figures, including:

[0011] - [Fig.l] illustrates a skin treatment device;

[0012] - [Fig.2] shows schematically the operation of the device, according to a sectional view, when applied to a user's skin;

[0013] - [Fig.3] shows a diagrammatic view in enlarged section of a device for treating the skin in operation;

[0014] - [Fig.4] shows a schematic sectional view of a device for processing the skin before folding;

[0015] - [Fig.5] shows a schematic sectional view of a folded skin treatment device;

[0016] - [Fig.6] shows a schematic sectional view of a folded skin treatment device in another way;

[0017] - [Fig.7] illustrates a folded skin treatment device, showing its front active;

[0018] - [Fig.8] illustrates a skin treatment device having a tab comprising part of a current generator;

[0019] - [Fig.9] illustrates another skin treatment device having a tab comprising part of a current generator;

[0020] - [Fig. 10] illustrates another skin treatment device having a tab comprising part of a current generator;

[0021] - [Fig.l 1] illustrates the skin treatment device of [Fig.8] whose tab is bent;

[0022] - [Fig. 12] illustrates an assembly comprising a support layer, a layer impregnation and a drop-shaped stencil layer;

[0023] - [Fig. 13] illustrates an assembly comprising a support layer, a layer impregnation and a circle-shaped stencil layer;

[0024] - [Fig. 14] illustrates an assembly comprising a support layer and a layer drop-shaped impregnation. DETAILED DESCRIPTION OF THE INVENTION Device

[0025] With reference to [Fig.l], there is proposed, according to a first aspect, a device 1 for treating the skin of a user by iontophoresis (also called iontophoresis) and / or electrostimulation. The device 1 is intended to be applied to the skin of the user, in particular and preferably to the face. The device 1 could be applied to any dermal part of the user's body. However, as will be detailed later, the invention proposes different forms of device which are remarkably well adapted for particular areas of the face which are often the subject of a desire for treatment by users. The device 1 advantageously allows cosmetic treatment of the skin, for example by activation of a cosmetic substance and / or by optimization and / or improvement of its effectiveness.Different methods are possible to do this, typically the generation of microcurrents, for example iontophoresis and / or electroporation. By activation, optimization and / or improvement of the effectiveness of a cosmetic substance, it is understood that at least one active agent contained in the cosmetic substance is likely to be activated or to have its effectiveness optimized and / or improved by the device 1, in order to increase the effectiveness of the cosmetic treatment of the skin.

[0026] The device 1 is adapted to be activated, that is to say put into operating conditions, by an activation product which is electrically conductive. In other words, the generation of electric currents is triggered by the application of a product to at least certain areas of the device 1. The device 1 is therefore inactive in the absence of the activation product, and only becomes active when the activation product is in contact with at least one predefined area, as will be detailed subsequently. This makes it possible to control the moment of activation of the product, and in particular to match this moment to the actual use of the device 1 by the user. Thus, during the storage (or transport) phase of the device 1, the latter is not activated, thus preserving its lifespan, and in particular the lifespan of the current generator, as will be detailed later.

[0027] The activation product may comprise an active agent for treating the skin. This active agent allows a cosmetic treatment of the skin, preferably non-therapeutic, the effectiveness of which is increased by the device 1, thanks to the current that it generates, as will be detailed later. Preferably, said active agent is ionized at the pH of the activation product, for example between 4 and 10, and substantially equal to 7, in order to obtain an electromigration mechanism.

[0028] The device 1 which is the subject of the invention will make it possible to improve the diffusion of the active agent in the skin, thanks to the principle of iontophoresis and / or electrostimulation and / or electroporation. These principles, using electric current to transport an active agent in the skin, are well known to those skilled in the art and will not be detailed in more detail. The activation product may for example comprise a cosmetic product, preferably non-therapeutic, such as a cosmetic cream, a serum, comprising an active agent such as vitamin C, hyaluronic acid, or any other active agent beneficial for the skin and compatible with treatment by iontophoresis and / or electrostimulation and / or electroporation. The activation product may also be a therapeutic product such as a cream for treating burns.

[0029] The device 1 may also be used to eliminate or reduce various types of pain or other sensory discomfort, including, but not limited to, back pain, joint pain, neck pain, shoulder pain, tingling or numbness of the skin, muscle pain, muscle cramps, joint stiffness, etc. To this end, the device 1 may then make it possible to improve the diffusion of an analgesic thanks to the principles set out above.

[0030] The device 1 may have different shapes depending on the area to which it is designed to be applied. For example, a device intended to be applied to the temple may have a general drop shape. Thus, the contours of the device are rounded and a first portion of the device, seen from above, is wider than a second portion of the device. A device intended to be applied to the cheekbone may have a circular shape. Thus, seen from above the device forms a disc. A device intended to be applied to the forehead may have a triangular shape. Thus, thanks to the different shapes proposed by the invention, each area of ​​the face traditionally treated with care (cheekbone, forehead, temple) has a device particularly well adapted to the shape of the area in question, which increases the comfort of use, ergonomics and effectiveness of the treatment. However, other shapes could be imagined, without departing from the scope of the invention, which would be adapted to other areas of the face or other dermal areas of the body such as the tops of the hands, the décolleté, etc. Support layer

[0031] With reference to [Fig.l], the device 1 comprises a support layer 2 and a current generator 24. The support layer 2 comprises at least one support film 21. The support film 21, and consequently, the device 1 which is the subject of the invention, is sufficiently flexible to be able to adapt to the shapes and reliefs of the skin of the area to be treated, and in particular to the cheekbones, temple, and forehead, as explained previously. The support film 21 is preferably insulating, that is to say that it does not allow the current to pass. This makes it possible to avoid any risk of short circuit within the device, by preventing the current from circulating in the support film 21.

[0032] The support film 21 is for example made of a flexible plastic such as polyurethane (PU) or polyethylene terephthalate (PET). Preferably, the support film 21 has a thickness greater than or equal to 20 μm, preferably greater than or equal to 40 μm, and less than or equal to 90 μm, for example substantially equal to 50 μm or 80 μm. Indeed, such thicknesses allow the support film 21, and therefore the device 1, to conform well to the area of ​​skin on which it is intended to be placed.

[0033] The device 1 may comprise a plurality of support films 21 assembled together, for example by gluing. On the contrary, the support film may be monolithic, that is to say formed from a single film.

[0034] The support layer 2 comprises an active face 25 intended to be in contact with the user's skin when the device 1 is applied to the user's skin.

[0035] The active face 25 comprises at least one main electrode 22, at least one counter-electrode 23 and at least a first part 24a of the current generator 24.

[0036] The current generator 24 is electrically connected to the main electrode 22 on the one hand and to the counter-electrode 23 on the other hand, so as to create an electrical potential differential between the latter.

[0037] The electrodes 22, 23 are distinct from the current generator 24. In other words, the main electrode 22 and the counter-electrode 23 are distinct elements from the current generator 24.

[0038] As will be detailed later, the current generator 24 may be arranged solely on the active face 25 of the support layer 2 or may comprise a first part 24a of the current generator 24 arranged on the active face 25 of the support layer and a second part 24b of the current generator 24 arranged on a tab 3 of the device 1. The electrodes 22, 23 are intended to be applied opposite the user's skin and are adapted to allow the circulation of an electric current in the user's skin, when the device 1 is placed in contact with the user's skin. Indeed, the user's skin behaves as a current consumer, in particular as a resistor. The skin of a mammal, in particular human skin, typically behaves as a 10 kΩ resistor. For this purpose, the main electrode 22 and / or the counter electrode 23 is formed at least from one main metal, a good electrical conductor.

[0039] The electrodes 22, 23 are intended to be in direct or indirect contact with the skin. By indirect contact, it is meant that an element is arranged between the electrode 22, 23 and the skin such as an activation product, an absorbent layer and / or a fabric, etc.

[0040] Consequently, the electrodes 22, 23, in particular the main electrode 22, advantageously have a size greater than that of a conductive pole 241, 242 of a galvanic couple 240 of the current generator 24 (the galvanic couples 240 will be detailed later). Also preferably, the main electrode 22 has a size greater than that of the current generator 24. This makes it possible to maximize the contact surface (direct or indirect) between the electrodes 22, 23 and the skin, the device 1 thus allowing the circulation of more active agent of the activation product in the skin. This also makes it possible to increase the transfer surface of the electric current between the device and the skin, and thus, for an equivalent intensity, to reduce the risk of pain or injury to the skin. This also implies that the size of the main electrode 22 and / or the counter electrode 23 can be adapted to that of the area of ​​the human or animal body to be treated..

[0041] The device 1 is in a so-called “operating” state when it is applied to the skin of a user and when the current generator 24 is activated so as to generate an electric current. The expression “in operation” will subsequently be used to designate a situation in which the device 1 is in operation, that is to say that it generates a potential differential between the electrodes, then an electric current when the device is applied to the skin.

[0042] In operation, the electric current generated by the current generator 24 flows between the electrodes 22, 23 and in the user's skin. As shown schematically in [Fig.2], the electric current flows via the current generator 24 to the main electrode 22, then penetrates the user's skin PE to reach the counter-electrode 23. The current can also flow in a direction opposite to that illustrated.

[0043] In certain cases, the main electrode 22 is called a “treatment electrode”. In other words, advantageously, the main electrode 22 can specifically allow the improvement of the absorption of an activation product when the main electrode 22 covers a portion of the user's skin to which an activation product containing a particular active agent is applied. In operation, the activation product is thus specifically absorbed by the skin at the main electrode 22, the shape of which can then advantageously be chosen to correspond as precisely as possible with the area to be treated. Thus, the main electrode 22 of the device can advantageously have the same shape as the general shape of the device 1, as defined and explained previously. This makes it possible to position the main electrode 22 as close and as precisely as possible opposite the specific area to be treated (cheekbone, temple, forehead, etc.).

[0044] The main electrode 22 may be a cathode or an anode and, correspondingly and inversely, the counter electrode 23 may be an anode or a cathode.

[0045] Preferably, the nature of the main electrode 22 (cathode or anode), and therefore of the counter-electrode 23, is adapted according to the type of activation product that it is desired to use in combination with the device 1. In particular, the main electrode 22 will be adapted to be an anode for certain types of activation products such as a vitamin C-based cream while the main electrode 22 will be adapted to be a cathode for certain other types of activation products.

[0046] More specifically, the activation product may comprise molecules that are positively or negatively charged at a given pH. If the main electrode 22 is intended to have the same polarity as the polarity of the molecules, the molecules are repelled by the main electrode 22 and thus pushed towards the user's skin. For example, vitamin C molecules are negatively charged for a pH between 5 and 7. A device 1 aimed at improving the absorption by the skin of vitamin C molecules present in an activation product will therefore preferably have a main electrode 22 forming an anode.

[0047] As can be seen in the various figures, the main electrode 22 preferably comprises carbon, advantageously in the form of a plurality of carbon points, for example arranged under the main metal constituting the main electrode. This makes it possible to give the user a visual indication of the main electrode 22 (or active electrode as explained previously) to help him position the latter correctly on the area of ​​the skin that he wishes to treat, without however degrading the electrical conductivity of the main electrode 22.

[0048] The counter-electrode 23 is intended to have a polarity opposite to that of the main electrode 22. The counter-electrode 23 is therefore a cathode if the main electrode 22 is an anode and the counter-electrode 23 is therefore an anode if the main electrode 22 is a cathode.

[0049] The main electrode 22 and the counter electrode 23 are made from conductive materials, typically metals. Preferably, the main electrode 22 and the counter electrode 23 comprise the same material. This allows a particularly simple construction of the device while minimizing the number of different materials in contact with the skin, and therefore the risk of undesirable reactions of the latter. Advantageously, the main electrode 22 and the counter electrode 23 are made of the same material or set of materials.

[0050] The main electrode 22 and the counter electrode 23 preferably comprise silver and / or silver chloride. More preferably, the main electrode 22 and the counter electrode 23 are made of silver and / or silver chloride. Furthermore, silver and silver chloride have the advantage of being good conductors of electricity. Silver chloride is less prone to oxidation than silver, so that combined with silver, it helps to limit oxidation and therefore to improve the durability of the electrodes 22, 23.

[0051] Preferably, the main electrode 22 and the counter electrode 23 are made of silver and silver chloride. More specifically, the main electrode 22 and the counter electrode 23 are each composed of 55% silver and 45% silver chloride.

[0052] Alternatively, the main electrode 22 and / or the counter electrode 23 are made of carbon. Carbon is conductive and not very oxidizable.

[0053] As explained previously, the main electrode 22 and the counter electrode 23 are distinct from the current generator 24. Consequently, the main electrode 22 and / or the counter electrode 23 may comprise materials different from the materials included in the current generator 24. The main electrode 22 and / or the counter electrode 23 may therefore be particularly suitable for contact with the skin in that they may comprise skin-friendly materials.

[0054] Preferably, the main electrode 22 and the counter-electrode 23 comprise the same material. This allows a particularly simple construction of the device while minimizing the number of different materials in contact with the skin, and therefore the risk of undesirable reactions of the latter. Advantageously, the main electrode 22 and the counter-electrode 23 are made of the same material or set of materials.

[0055] Advantageously, the main electrode 22 and the counter-electrode 23 are printed on the support film 21 using conductive inks, and preferably metallic inks. In particular, the main electrode 22 and the counter-electrode 23 are preferably printed on the support film 21 by screen printing.

[0056] The current generator 24 comprises at least one galvanic couple 240. The galvanic couple 240 is formed of a first conductive pole 241 forming a cathode and a second conductive pole 242 forming an anode. The first conductive pole 241 and the second conductive pole 242 of a galvanic couple 240 are arranged at a distance and separated from each other and are intended to be arranged opposite each other, that is to say that the first conductive pole 241 and the second conductive pole 242 are designed to face each other when the device 1 is in operation, for the establishment of an electrical connection between them by means of the activation product. More precisely, the first conductive pole 241 and second conductive pole 242 of a galvanic couple 240 are arranged in the device 1 so as to be able to be positioned opposite each other, in particular one on top of the other, without preventing the other elements of the device 1 from functioning, in particular the operation of the main electrode 22 and the counter-electrode 23 during the application of the device 1 to the user's skin

[0057] The first conductive pole 241 and the second conductive pole 242 of the galvanic couple 240 are adapted to, when connected by the activation product, allow the circulation of electrons between them. The electrons are generated by the difference between the standard electrical redox potentials of the first conductive pole 241 and the second conductive pole 242.

[0058] A galvanic couple 240 is thus adapted to generate an electric current when the first conductive pole 241 and the second conductive pole 242 are connected so as to allow an oxidation-reduction reaction between said poles. An electrochemical cell is formed.

[0059] More precisely, when the first conductive pole 241 and the second conductive pole 242 of the galvanic couple 240 are connected by the activation product, in contact with the activation product, atoms constituting the second conductive pole 242 (forming an anode) oxidize and electrons are released. The electrons then flow via the activation product to the second conductive pole 242. As illustrated in [Fig.2], the activation product PA between the first conductive pole 241 and the second conductive pole 242 allows the flow of electrons and the generation of an electrical circuit.

[0060] Thus, in operation, the device 1 is traversed by an electric current without requiring an external battery or any other source of electrical power external to the device 1. This results in a remarkably limited size of the device 1, and remarkable freedom of use (no need for a power outlet, external battery, etc.).

[0061] The materials constituting the first conductive pole 241 and the second conductive pole 242 advantageously comprise conductive materials, typically metals.

[0062] The first conductive pole 241 (forming the cathode) advantageously comprises silver and / or silver chloride. Preferably, the first conductive pole 241 is in silver and / or silver chloride.

[0063] The second conductive pole 242 (forming the anode) advantageously comprises zinc. Preferably, the second conductive pole 242 is made of zinc. In this case, the zinc is the reducing agent in the chemical oxidation-reduction reaction and the second conductive pole 242 (the zinc ink in this case) will be consumed during use of the device 1.

[0064] Thus, advantageously, when the first conductive pole 241 and the second conductive pole 242 are connected by an activation product, the zinc atoms are oxidized and therefore release electrons according to the following reaction: Zn —> Zn2+ + 2e.

[0065] The electrons will flow from the first conductive pole 241 to the second conductive pole 242. This is made possible by the fact that the standard electrical redox potentials of zinc and silver are different. In this case, the theoretical standard electrical potential of zinc is -0.76 V and that of silver is +0.80 V. Thus, each galvanic couple 240 formed of zinc and silver theoretically makes it possible to produce a 1.56 V battery.

[0066] The galvanic couples 240 may comprise other materials. For example, these pairs can be formed from: zinc-copper, zinc-copper / copper halide, zinc-copper / copper oxide, magnesium-copper, magnesium-copper / copper halide, zinc-silver, zinc-silver-silver oxide, zinc-silver-silver halide, zinc-silver-silver chloride, zinc-silver-silver bromide, zinc-silver-silver iodide, zinc-silver-silver fluoride, zinc-gold, magnesium-gold, aluminum-gold, magnesium-silver, magnesium-silver-silver oxide, magnesium-silver-silver halide, magnesium-silver-silver chloride, magnesium-silver-silver bromide, magnesium-silver-silver iodide, magnesium-silver-silver fluoride, magnesium-gold, aluminum-copper, aluminum-silver, aluminum-silver-silver oxide, aluminum-silver / silver halide, aluminum-silver / silver chloride, aluminum-silver / silver bromide, silver / silver aluminum iodide, silver / silver aluminum fluoride,copper-silver / silver halide, copper-silver / silver chloride, copper-silver / silver bromide, copper-silver / silver iodide, copper-silver / silver fluoride, iron-copper, iron-copper / copper oxide, iron-copper, iron-copper / copper oxide, iron-copper / copper halide, iron-silver, iron-silver / silver oxide, iron-silver / silver halide, iron-silver / silver chloride, iron-silver / silver bromide, iron-silver / silver iodide, iron-silver / silver fluoride, iron-gold, iron-carbon conductor, zinc-carbon conductor, copper-carbon conductor, magnesium-carbon and aluminum-carbon.

[0067] The galvanic couples 240 and the couple comprising the main electrode 22 and the counter-electrode 23 may also comprise alloys.

[0068] As explained previously, the current generator 24 is connected electrically trically to the main electrode 22 on the one hand and to the counter electrode 23 on the other hand.

[0069] More precisely, the main electrode 22 is electrically connected to a first conductive pole 241 of a galvanic couple 240 or to a second conductive pole 242 of a galvanic couple 240.

[0070] Depending on the nature of the main electrode 22 (anode or cathode), the main electrode 22 is electrically connected to one or the other of a first conductive pole 241 of a galvanic couple 240 and a second conductive pole 242 of a galvanic couple 240.

[0071] For example, if the main electrode 22 is an anode, it will be connected to a second conductive pole 242 since the latter forms an anode. Generally, each of the main electrode 22 and counter electrode 23 is intended to have the same polarity as the first or second conductive pole 241, 242.

[0072] The main electrode 22 and the counter-electrode 23 can be connected to a conductive pole 241, 242 of the same galvanic couple 240 or of different galvanic couples 240. In the case where the current generator 24 comprises a single galvanic couple 240, the main electrode 22 and the counter-electrode 23 are connected to a conductive pole 241, 242 of this same galvanic couple 240.

[0073] One of the electrodes 22, 23 is electrically connected to a first conductive pole 241 by a first connector 244. The other of the electrodes 22, 23 is electrically connected to a second conductive pole by a last connector 245.

[0074] In other words, the first conductive pole 241 connected to an electrode 22, 23 is connected to the electrode 22, 23 via the first connector 244. The second conductive pole 242 connected to an electrode 22, 23 is connected to the electrode 22, 23 via the last connector 245.

[0075] The main electrode 22 and the counter-electrode 23 can be connected to a conductive pole 241, 242 via connectors 244, 245 advantageously comprising carbon, and preferably made of carbon. A connector 244, 245 comprising carbon, referred to hereinafter as a carbon connector 244, 245, allows the circulation of an electric current.

[0076] A carbon connector 244, 245 is advantageously a carbon strip. A carbon connector 244, 245 preferably has a length of less than 5 mm and greater than 1 mm and a width of the order of 2 mm. The length of a carbon connector 244, 245 is preferably less than 5 mm to allow good current conductivity, a carbon connector that is too long having significant resistance. In the case where a connector is required over a longer distance, in particular greater than 5 mm, it will be preferable to use another material. best conductor, preferably the material used for the main electrode 22 or the counter electrode 23.

[0077] Preferably, a connector 244, 245 is printed on the support film 21 using a conductive ink comprising carbon, preferably by screen printing. A carbon connector 244, 245 comprises carbon but may additionally comprise other materials, preferably conductive materials.

[0078] The main electrode 22 and the counter electrode 23 may be connected to a conductive pole 241, 242 via connectors 244, 245 comprising other electrically conductive materials. For example, a connector 244, 245 may comprise the same material as a material included in the main electrode 22 and / or the counter electrode 23.

[0079] Alternatively, the main electrode 22 and the counter electrode 23 may be connected to a conductive pole 241, 242 by direct contact between an electrode 22, 23 and a conductive pole 241, 242.

[0080] According to a non-illustrated embodiment, the first connector 244 comprises a material identical to a material included in the electrode 22, 23. Preferably, the first conductive pole 241 and the electrode 22, 23 to which the first conductive pole 241 is connected comprise silver and / or silver chloride and the first connector 244 comprises silver and / or silver chloride. Also preferably, the last connector 245 is made of carbon.

[0081] According to an embodiment illustrated in [Fig.l], the counter electrode 23 is connected to the first conductive pole 241, the counter electrode 23 and the first conductive pole 241 are made of silver and / or silver chloride and the first connector 244 which connects the counter electrode 23 and the first conductive pole 241 is made of silver and / or silver chloride. Since the counter electrode 23 and the first conductive pole 241 are made of the same material, they can be continuously connected by a first connector 244 of the same material. The printing of the counter electrode 23, the first conductive pole 241 and first connector 244 on the support film 21 is thus facilitated and does not require a different material for the first connector 244.

[0082] Furthermore, in the embodiment illustrated in [Fig.l], the main electrode 22 is connected to the second conductive pole 242, the electrode 22 is made of silver and / or silver chloride, the second conductive pole 242 is made of zinc and the last connector 245 which connects the electrode 22 and the second conductive pole 242 is made of carbon.

[0083] Alternatively, the electrode 22 could be in direct contact with the second conductive pole 242 and there would be no additional connector.

[0084] Advantageously, the current generator 24 comprises a plurality of galvanic couples 240. It is then understood that the main electrode 22 is connected to a conductive pole 241, 242 of a galvanic couple 240a different from the galvanic couple 240d of which a conductive pole 241, 242 is connected to the counter-electrode 23. More precisely, a conductive pole 241, 242 of a first galvanic couple 240a is electrically connected to the main electrode 22 and a conductive pole 241, 242 of a last galvanic couple 240d is electrically connected to the counter-electrode 23.

[0085] The current generator 24 comprises a plurality of galvanic couples 240 preferably connected in series. The galvanic couples 240 are thus adjacent two by two and are electrically connected two by two. This makes it possible to make a series connection of said plurality of galvanic couples 240, and therefore to increase the voltage potential, as will be detailed later.

[0086] Preferably, two adjacent galvanic couples 240 are separated by a distance equal to the distance which separates the two conductive poles 241, 242 of the same galvanic couple 240.

[0087] More precisely, two adjacent galvanic couples 240b, 240c are connected by connecting the second conductive pole 242b of one galvanic couple 240b and the first conductive pole 241c of the other galvanic couple 240c.

[0088] Advantageously, two adjacent galvanic couples 240 are electrically connected via a couple connector 246 advantageously comprising carbon. Preferably, the couple connector 246 is made of carbon. The couple connectors 246 make it possible to circulate an electric current from one galvanic couple 240 to another adjacent galvanic couple 240. Alternatively, the couple connector 246 may comprise other materials, such as for example electrically conductive metals. However, as illustrated in the various figures, it will be preferred to use carbon couple connectors 246 for its low cost, its ease of implementation and its harmlessness to the skin.

[0089] Preferably, with reference to Figures 1 and 3, the torque connector 246 extends below at least one conductive pole 241, 242 that it connects. In other words, the at least one conductive pole 241, 242 partially covers the torque connector 246.

[0090] More preferably, the couple connector 246 comprises a portion extending below at least 80% of the surface of a conductive pole 241, 242. Advantageously, the couple connector 246 comprises a portion extending below at least 80% of the surface of a second conductive pole 242. This makes it possible to improve the electrical conductivity between two adjacent galvanic couples 240. Advantageously, each couple connector 246 has, in top view, a p-shape (or symmetrically q-shape), that is to say that it has a solid, substantially square zone and a tail (or thin zone), the solid zone extending below the surface of a second conductive pole 242 while the tail is not covered. Such a arrangement makes it possible to optimize the passage of current between two adjacent galvanic couples 240 without impacting the redox reaction, or even by optimizing it.

[0091] Indeed, in the case, for example, of a couple connector 246 made of carbon and a second conductive pole 242 made of zinc, the conductivity is improved because carbon is more conductive than zinc. It has been measured that the conductivity could be multiplied by two when the couple connector 246 has a solid zone under a conductive pole 241, 242.

[0092] According to one embodiment, the solid area of ​​the torque connector 246 corresponds to 100% of the surface area of ​​a second conductive pole 242. In the embodiment illustrated in [Fig.l] for example, the surface area of ​​a second conductive pole 242 is greater than the solid area of ​​the torque connector 246, that is to say that the second conductive pole 242 (in this case zinc) covers the torque connector 246 (in this case carbon) and protrudes from said torque connector 246. This makes it possible to ensure that, despite manufacturing tolerances, the second conductive pole 242 (in this case zinc) will completely cover the torque connector 246 (in this case carbon), in particular in order to guarantee a good aesthetic appearance of the device 1.

[0093] The couple connectors 246 are advantageously arranged on the support film 21 so that, when activation product is applied to the free spaces 243 of the current generator 24 and the device 1 is applied to the user's skin, the electric current flows between the different galvanic couples 240 via the couple connectors 246. In other words, the couple connectors 246 are correctly arranged to ensure good circulation of the electric current within the electric generator 24. This also applies to the connectors 244, 245 which are also arranged on the support film 21 and which are therefore correctly arranged to ensure good circulation of the electric current between the electric generator 24 and the electrodes 22, 23.

[0094] Alternatively, according to an embodiment not illustrated, two adjacent galvanic couples 240 are electrically connected by direct contact between the second conductive pole 242 of a galvanic couple 240 and the first conductive pole 241 of an adjacent galvanic couple 240. This makes it possible to achieve the series connection of said plurality of galvanic couples 240, without having to use another material.

[0095] Arranging a plurality of galvanic couples 240 in series makes it possible to generate, when the device 1 is in operation, a voltage (measured between the main electrode 2 and the counter-electrode 23) higher than the voltage generated by a single galvanic couple 240. Indeed, the voltages generated by each galvanic couple 240 of a series of galvanic couples 240 are cumulative. For example, theoretically, a zinc-silver galvanic couple 240 generates a voltage of 1.56 V. Consequently, theoretically, a current generator 24 comprising two couples 240 galvanic couples will generate a voltage of 3.12 V (1.56 V multiplied by 2) and a 24 current generator comprising three 240 galvanic couples will generate a voltage of 4.68 V (1.56 V multiplied by 3). Empirically, it has been measured that a 24 current generator comprising a 240 zinc-silver galvanic couple generates a voltage of 1.1 V. Thus, empirically, a 24 current generator comprising two 240 galvanic couples generates a voltage of 2.2 V (1.1 V multiplied by 2) and a 24 current generator comprising three 240 galvanic couples generates a voltage of 3.3 V (1.1 V multiplied by 3). The current generator 240 of the support layer 2 illustrated in [Fig.l] comprises nine galvanic couples 240. Empirically, this current generator 24 generates a voltage of 9.9 V (1.1 multiplied by 9).

[0096] Consequently, in operation, the intensity of the electric current generated by the plurality of galvanic couples 240 in series is greater than the electric current generated by a single galvanic couple 240. Indeed, the resistance of the skin (which will consume the current) remaining identical, by increasing the voltage compared to the devices of the prior art, thanks to the series connection of said plurality of galvanic couples 240, the current (principle of Ohm's law) which will circulate in the skin is necessarily increased, when the device 1 of the invention is activated and placed on the skin. It is recalled that the skin behaves on average like a resistance of 10 kΩ (10,000 Q). Thus, theoretically, a current generator 24 comprising a single galvanic couple 240 will generate a current of 110 pA (1.1 V / 10,000 Q). Similarly, a current generator 24 comprising four galvanic couples 240 as illustrated in [Fig.9] will generate a current of 440 pA (4.4 V / 10,000 Q), a 24 current generator comprising six 240 galvanic couples as illustrated in [Fig. 10] will generate a current of 660 pA (6.6 V / 10,000 Q) and a 24 current generator comprising nine 240 galvanic couples as illustrated in [Fig.l] will generate a current of 990 pA (9.9 V / 10,000 Q).

[0097] However, due to current losses (for example at the contact between the skin and the electrodes 22, 23), the actual current measured is lower than the theoretical current. Thus, for example, the current generator 24 illustrated in [Fig.9] comprising four galvanic couples 240 generates a current with an intensity of approximately 240 pA. The current generator 24 of the drop-shaped support layer 2 illustrated in [Fig.l] and comprising nine galvanic couples 240 generates a current with an intensity of up to 54000 pA.

[0098] The performance of the current generator 24 is thus improved. Thus, more current flows through the user's skin, which will increase the treatment by iontophoresis and / or electrostimulation and / or electroporation. The performance and effectiveness of the device 1 are therefore improved. This allows, among other things, better diffusion of an active agent of an activation product into the user's skin.

[0099] Advantageously, the current generator 24 comprises at least three galvanic couples 240. Preferably, the current generator 24 comprises at least four galvanic couples 240 as in the example illustrated in [Fig.l].

[0100] Preferably, the elements printed on the support film 21 (electrodes 22, 23, at least the first part 24a of the current generator 24 and connectors 244, 245, 246) have a thickness of between 10 μm and 20 μm. The support film 21 has, as already mentioned, a thickness of between 20 μm and 90 μm, or 40 μm and 90 μm. Consequently, the support layer 2 preferably has a thickness of between 30 μm and 110 μm, or between 50 μm and 110 μm. The support layer 2 thus offers a remarkable compromise between electrical conductivity, flexibility, and duration of use (in particular for the zinc ink which is consumed during the treatment as explained previously).

[0101] Preferably, the establishment of the electrical connection between the two conductive poles 241, 242 of at least one galvanic couple 240, preferably each galvanic couple 240, is implemented by folding the support film 21 on itself. Thus, advantageously, the support film 21 is adapted to be folded so that the first conductive pole 241 and the second conductive pole 242 of the galvanic couple 240 are arranged opposite each other (face to face) for the establishment of the electrical connection so that, when the device is applied to the user's skin, the current generator 24 is not, and cannot be, in contact with the skin.

[0102] Figures 4 to 6 illustrate a device 1 whose current generator 24 comprises a single galvanic couple 240. Figures 4 to 6 respectively diagram the device 1 before and after application of activation product PA and folding of the support film 21 on itself. Of course, the arrangement and folding principle illustrated in these figures can be adapted to a current generator 24 comprising several galvanic couples 240.

[0103] According to an embodiment illustrated in [Fig.l] according to which the current generator 24 is only arranged on the active face 25 of the support layer 2, the support film 21 comprises a primary fold line L1 dividing the support film 21 into two parts and is intended to be folded along the primary fold line LL. For each galvanic couple 240, one of the first conductive pole 241 and the second conductive pole 242 is arranged on one side of the primary fold line L1 and the other of the first conductive pole 241 and the second conductive pole 242 is arranged on the other side of the primary fold line LL. In other words, as illustrated in [Fig.l], the current generator 24 comprises a first part 24a of the current generator 24 and a second part 24b of the current generator 24, the first part 24a being different from the second part 24b and the first part 24a being arranged on one side of the primary fold line L1 while the second part 24b is arranged on the other. side of the primary fold line Ll.

[0104] In such a way, when the support film 21 is folded along the primary fold line L1 so that two parts of the active face 25 are opposite each other, the first part 24a of the current generator 24 and the second part 24b of the current generator 24 are arranged opposite each other and, for each galvanic couple 240, the first conductive pole is arranged opposite the second conductive pole 242. Thus, if activation product has been previously applied to one of the conductive poles 241, 242 of the galvanic couple(s) 240, the galvanic couples 240 are activated and the electrical connection is correctly established at these galvanic couples 240.This makes it possible, in a remarkable way, on the one hand to activate the current generator 24 (and therefore to start producing current) and on the other hand to guarantee the absence of contact between the current generator 24 and the user's skin, since the current generator 24 is folded back on itself.

[0105] Preferably, as illustrated in [Fig.l], two conductive poles 241, 242 of two different and adjacent galvanic couples 240 which are connected (for example via a couple connector 246) are arranged on the same side of the primary fold line Ll. In other words, the connection between two adjacent galvanic couples 240, which comprises a conductive pole 241, 242 of two different and adjacent galvanic couples 240 and possibly a couple connector 246, is arranged on the same side of the primary fold line LL. This makes it possible, when the first part 24a of the current generator 24 is arranged opposite the second part 24b of the current generator 24, to create an electrically connected series of galvanic couples 240 as illustrated in Figures 2 and 3.

[0106] Preferably, the support film 21 comprises a secondary fold line L2 arranged between the current generator 24 and the main electrode 22. More specifically, the secondary fold line L2 is arranged between the main electrode 22 and the second part 24b of the current generator 24. The secondary fold line L2 divides the support film 21 into two parts. The support film 21 is intended to be folded along the secondary fold line L2. Thus, initially, the user can fold the support film 21 along the primary fold line L1 so that the first part 24a of the current generator 24 and the second part 24b of the current generator 24 are arranged opposite each other. In other words, the support film 21 is folded at an angle of 180° by the user along the primary fold line LL. The support film 21 is thus folded towards the inside of said support film 21.By "inside" of the support film 21 is meant the face, called the inner face, of the support film 21 on which the electrodes 22, 23 and the first part 24 of the current generator 24 are arranged. Thus, when the support film 21 is folded inwards along the primary fold line L1, a part of the inner face located on one side of the primary fold line L1 is found, after . folding, opposite the part of the inner face located on the other hand of the primary fold line L1. Then, the user can fold the support film 21 along the secondary fold line L2 so that the main electrode 22 and the counter-electrode 23 are no longer arranged opposite each other but are arranged in the same plane as illustrated in figures 6 and 7. Here again, the support film 21 is folded at an angle of 180° by the user along the secondary fold line L2. The support film 21 is here folded outwards, as opposed to folding inwards, so that the part of the inner face located on the one hand of the secondary fold line L2 is no longer, after folding, opposite the part of the inner face located on the other hand of the secondary fold line L2. Thus, when the device 1 as shown in [Fig.6] is applied to the user's skin, only the electrodes 22 and 23 are in contact with the user's skin. There is no contact between the current generator 24 and the user's skin, which makes it possible to avoid short circuits between the different poles of the current generator via the skin but also to prevent any risk of migration of components, in particular metals, from the poles of the current generator 24, avoiding any risk of allergic reaction of the skin.

[0107] The support film 21 may comprise a tertiary fold line L3 arranged between the current generator 24 and the counter electrode 23 as illustrated in [Fig. 1]. More specifically, the tertiary fold line L3 is arranged between the first portion 24a of the current generator 24 and the counter electrode 23. The tertiary fold line L3 divides the support film 21 into two portions. The support film 21 is intended to be folded along the tertiary fold line L3. Thus, alternatively, the user can fold the support film 21 along the primary fold line L1 (at an angle of 180° inwards) and along the tertiary fold line L3 (at an angle of 180° outwards). In other words, according to this embodiment, the support film 21 is not folded along the secondary fold line L2.

[0108] According to another folding embodiment illustrated in [Fig.5], the support film 21 can be folded along the primary fold line L1 (at an angle of 180° towards the inside) then along the secondary fold line L2 (at an angle of 90° towards the outside) and along the tertiary fold line L3 (at an angle of 90° towards the outside) so that the main electrode 22 and the counter-electrode 23 are arranged in the same plane.

[0109] According to this embodiment, advantageously, the conductive pole 241, 242 of the first galvanic couple 240a which is connected to the main electrode 22, in [Fig.l] the second conductive pole 242a, is part of the second part 24b of the current generator 24 and is therefore arranged on the active face 25 of the support layer 2, on one side of the primary fold line LL. Likewise, advantageously, the conductive pole 241, 242 of the last galvanic couple 240d, in [Fig.l] the first conductive pole 241d, which is connected to the counter electrode 23 is part of the first part 24a of the current generator 24 and is therefore arranged on the active face 25 of the support layer 2, on the other side of the primary fold line L1.

[0110] According to another embodiment illustrated in figures 8 to 10, the first part 24a of the current generator 24 is arranged on the active face 25 of the support layer 2 and the second part 24b of the current generator 24 is arranged on a tab 3. Advantageously, the tab 3 belongs to the device 1. Preferably, the tab 3 comprises a protective film 30 provided to cover, preferably completely, the first part 24a of the current generator 24, the protective film 30 of the tab 3 preventing any contact between the current generator 24 and the skin of the user when the device 1 is applied to the skin of the user. Thus, the contact surface, direct or preferably indirect, between the skin and metallic elements of the device 1 (i.e. the electrodes 22, 23 and the current generator 24) is reduced when the device 1 is applied to the skin.This prevents any risk of migration of materials, and in particular metals, constituting the current generator 24 towards the skin. In particular, this prevents any risk of migration of zinc and carbon towards the skin, if the current generator 24 includes them.

[0111] Advantageously, the protective film 30 is provided to cover the first part 24a of the current generator 24 without covering the main electrode 22. Preferably, the protective film 30 is provided to cover the first part 24a of the current generator 24 without covering the main electrode 22 and the counter-electrode 23. In other words, the protective film 30 has a surface area smaller than that of the device 1. In still other words, the protective film 30 is adapted to cover only the first part of the current generator 24. Consequently, the tab 3 makes it possible to prevent any contact between the current generator 24 and the skin while allowing contact between the electrodes 22, 23 and the skin.

[0112] The tab 3 comprises a covering face 31 intended to be positioned opposite the first part 24a of the current generator 24. It is understood that the tab 3 is adapted to avoid the occurrence of short circuits when the device is in operation, via the skin, since the current generator cannot be in contact with the skin. The tab 3 thus ensures good circulation of the electric current in the user's skin and the device 1 is thus more efficient. In addition, the tab 3, by preventing any contact between the skin and the current generator, makes it possible to avoid any risk of migration of the components of the current generator, and in particular of the metals of its poles, towards the skin, avoiding any inappropriate reaction of the skin, and increasing the safety of use of the device 1.

[0113] Preferably, the protective film 30 comprises at least one electrically insulating material. More preferably, the protective film 30 comprises at least one material impermeable to the activation product. For example, the protective film 30 is made of a flexible plastic such as polyurethane (PU) or polyethylene terephthalate (PET).

[0114] The tab 3 may be an element physically independent of the support layer 2.

[0115] Preferably, as illustrated in Figures 8 to 10, the tab 3 is physically linked to the support layer 2. In other words, the tab 3 is preferably physically linked to at least one support film 21. By “physically linked”, it is understood that the tab 3 is advantageously connected to, attached to and / or permanently secured to the support layer 2. This has the particular advantage of facilitating the use of the device 1 which is in this case a single piece and avoids any risk of losing the tab 3.

[0116] Advantageously, the tab 3 is integral with the support layer 2 and the tab 3 is designed to be folded so as to cover the first part 24a of the current generator 24. The fold line then corresponds to the primary fold line described above. It is therefore understood that, prior to applying the device 1 to the skin, the user can simply fold the tab 3 which is arranged so as, when folded, to cover the first part 24a of the current generator 24.

[0117] The tab 3 is advantageously bonded to the support layer 2 so that, when it is folded along a fold line corresponding to the junction line between the support layer 2 and the tab 3, the protective film 30 of the tab 3 covers the first part 24a of the current generator 24. In other words, preferably, the protective film 30 has a shape similar to the shape of the current generator 24.

[0118] [Fig. 11] illustrates a device 1 having a tab 3 folded so that it covers the first part 24a of the current generator 24, the tab 3 being illustrated transparently so as to allow the current generator to be seen. In this configuration the device is ready to operate and to be applied to the skin, the tab 3 preventing any contact between the current generator 24 and the skin, as explained previously. As explained, the tab 3 comprises the second part 24b of the current generator 24 which is arranged on the covering face 31. According to this embodiment, the first part 24a of the current generator 24 comprises, for each galvanic couple 240, one of the first conductive pole 241 and the second conductive pole 242 and the second part 24b of the current generator 24 comprises the other of the first conductive pole 241 and the second conductive pole 242.The first conductive pole 241 or second conductive pole 242 of the second part 24b of the current generator 24 is provided so that, when the tab 3 covers the first part 24a of the current generator 24, it is arranged opposite the first. conductive pole 241 or second conductive pole 242 of the first part 24a of the current generator 24 belonging to the at least one galvanic couple 240. For example, as illustrated in figures 8 to 10, the first conductive pole 241x of a galvanic couple 240x is part of the first part 24a of the current generator 24 and is therefore arranged on the active face 25 while the second conductive pole 242x of the galvanic couple 240x is part of the second part 24b of the current generator 24 and is therefore arranged on the covering face 31. The circulation of the electric current is shown diagrammatically in figures 2 and 3.

[0119] Advantageously, the conductive pole 241, 242 of the first galvanic couple 240a which is connected to the main electrode 22 is part of the first part 24a of the current generator 24 and is therefore arranged on the active face 25 of the support layer 2. As illustrated in FIGS. 8 to 10, the second conductive pole 242a of the first galvanic couple 240a is arranged on the active face 25. Similarly, advantageously, the conductive pole 241, 242 of the last galvanic couple 240d which is connected to the counter-electrode 23 is part of the first part 24a of the current generator 24 and is therefore arranged on the active face 25 of the support layer 2. As illustrated in FIGS. 8 to 10, the first conductive pole 241d of the last galvanic couple 240d is arranged on the active face 25.

[0120] As illustrated in [Fig.8], two conductive poles 241, 242 of two different and adjacent galvanic couples 240 which are connected (for example via a couple connector 246) advantageously both form part of either the first part 24a of the current generator 24 or the second part 24b of the current generator 24 and are therefore both arranged either on the active face 25 of the support layer 2 or on the covering face 31 of the tab 3. In other words, the connection between two adjacent galvanic couples 240, which comprises a conductive pole 241, 242 of two different and adjacent galvanic couples 240 and possibly a couple connector 246, is arranged either on the active face 25 of the support layer 2 or on the covering face 31 of the tab 3.

[0121] Furthermore, as illustrated in figures 8 to 10, advantageously, the conductive poles 241, 242 connected respectively to the electrode 22 and to the counter-electrode 23 are included in the first part 24a of the current generator 24 and are therefore arranged on the active face 25 of the support layer 2.

[0122] These embodiments according to which a second part 24b of the current generator 24 is arranged on the tab 3 make it possible to avoid short circuits between the current generator 24 and the electrodes 22, 23. Indeed, the tab 3 is intended to be arranged on the support layer 2 so that, when the device 1 is in operation, the protective film 30 is arranged between the second part 24b of the current generator 24 and the user's skin. In other words, when the film protection 30 covers the current generator 24 and when the device 1 is applied to the user's skin, the second part 24b of the current generator 24 is arranged opposite the active face 25 and not opposite the skin.

[0123] According to a certain embodiment illustrated in [Fig. 8], the tab 3 comprises activation product arranged on the covering face 31 so as to electrically connect the first conductive pole 241 and the second conductive pole 242 of each galvanic couple 240 when the protective film 30 of the tab 3 covers the first part 24a of the current generator 24. More precisely, activation product can be arranged, either by the user during use, or previously during the manufacture of the device 1, on the covering face 31 so that, when the protective film 30 of the tab 3 covers the first part 24a of the current generator 24, activation product is arranged between the first conductive pole 241 and the second conductive pole 242 of a galvanic couple 240 (positioned opposite each other) as illustrated in [Fig. 11].

[0124] Preferably, the activation product is arranged at a plurality of activation zones 310 of the covering face 31 of the tab 3, the activation zones 310 being distinct and separated from one another and each corresponding to at least a part of a conductive pole 241, 242 of a galvanic couple 240. In other words, the activation product is only arranged on the conductive poles 241, 242 arranged on the tab 3. This makes it possible to avoid the occurrence of short circuits when the device 1 is in operation and also to limit the quantity of activation product used.

[0125] Advantageously, the first part 24a of the current generator 24 and the second part 24b of the current generator 24 are printed on the support film 21 of the support layer 2 and, where appropriate, on the covering face 31 of the tab 3, using conductive inks, and preferably metallic inks. In particular, the first part 24a of the current generator 24 and the second part 24b of the current generator 24 are preferably printed by screen printing.

[0126] Advantageously, the device 1 comprises at least one or more adhesive films 7 intended to be arranged on the support film 21 or, possibly where appropriate, on the protective film 30 of the tab 3, on one side and / or the other side of the primary fold line L1 so as to, when the support film 21 or possibly where appropriate the protective film 30 of the tab 3 is folded along the primary fold line L1, maintain the electrical connection between the first conductive pole 241 and the second conductive pole 242. In other words, the adhesive film 7 makes it possible to maintain the device 1 in the folded configuration and therefore to maintain the conductive poles 241, 242 of each galvanic couple 240 facing each other.

[0127] In the embodiment according to which the device 1 comprises a tab 3, a adhesive film 7 is intended to be arranged between the active face 25 and the covering face 31 of the tab 3 when the tab 3 covers the first part 24a of the current generator 24.

[0128] According to one embodiment, the adhesive film 7 may be arranged on the active face 25 and have an internal adhesive surface intended to be in contact with the support layer 2 so as to ensure the fixing of the adhesive film 7 on the latter. The adhesive film 7 also comprises an external adhesive surface intended to come into contact with the covering face 31 of the tab 3 and to ensure the fixing of the tab 3 to the support layer 2.

[0129] Alternatively, as illustrated in [Fig.8], the adhesive film 7 may be arranged on the covering face 31 of the tab 3 and have an internal adhesive surface intended to be in contact with the tab 3 so as to ensure the fixing of the adhesive film 7 on the latter. The adhesive film 7 also comprises an external adhesive surface intended to come into contact with the active face 25 of the support layer 2 and to ensure the fixing of the tab 3 to the support layer 2.

[0130] Consequently, when the device 1 is applied to the user's skin, the tab 3 covers the first part 24a of the current generator 24 and prevents any contact between the current generator 24 and the user's skin throughout the duration of operation of the device 1, i.e. throughout the duration during which the device 1 is applied to the user's skin.

[0131] As illustrated in Figures 8 to 10, different shapes of tongue 3 can be designed, in order to correspond to the shapes of the support layer 2. For example, the tongue 3 can be elongated as can be seen in Figures 8 and 9 in order to correspond with a current generator of substantially elongated shape. More precisely, in the case of [Fig. 8], current generator 24 and tongue 3 are arched whereas in [Fig. 9], current generator 24 and tongue 3 are rectilinear. In [Fig. 10], the tongue has a circular shape, and more precisely a horseshoe shape, so as to be able to cooperate with a current generator 24 of circular shape.

[0132] In all cases, it is noted that the tab 3 is designed not to cover the electrodes 22 or 23.

[0133] It is therefore understood that the invention makes it possible to guarantee the absence of contact between the skin and the current generator 24 by forming a physical barrier between them: - Thanks to the protective film 30 of the tab 3 which adds a physical barrier between the current generator 24 and the user's skin when the device 1 is applied to the user's skin, as can be seen in [Fig.11],

[0134] and / or - Thanks to the folding of the current generator 24 on itself eliminating any possibility of physical contact between the current generator 24 and the user's skin when the device 1 is applied to the user's skin, as can be seen in [Fig.5].

[0135] This physical barrier will therefore on the one hand prevent the occurrence of short circuits between the different components via the skin, while preventing the migration of the components of the current generator towards the skin when using the device. Impregnation layer

[0136] With reference to figures 2 and 12 to 14, the device 1 preferably comprises an impregnation layer 4 comprising at least one impregnation film 41. The impregnation layer 4 covers at least the main electrode 22, the counter-electrode 23 and the current generator 24.

[0137] Indeed, to operate the device 1, it is desired that the activation product be impregnated at the level of zones 42 of the impregnation layer 4, called “activation zones 42”.

[0138] First of all, it is necessary to activate the current generator 24 and therefore its galvanic couples 240. To do this, it is necessary to connect the conductive poles 241, 242 of each galvanic couple 240 together so that an oxidation-reduction reaction takes place, as explained previously. This can be implemented by the presence of the activation product at the conductive poles 241, 242, more particularly the conductive poles 241, 242 of the first part 24a of the current generator 24. Thus, it is desired that the activation product be arranged, for each galvanic couple 240, between the first conductive pole 241 and the second conductive pole 242 when they are arranged opposite each other (i.e. when the device 1 is folded) and that the activation product remains during a certain operating time of the device 1 between the first conductive pole 241 and the second conductive pole 242.The impregnation layer 4 at the current generator 24 plays in particular the role of a reservoir of activation product and thus allows the activation of the galvanic couples 240 of the current generator 24 for a certain period of time. Thus, current is generated for a certain period of time, preferably for the duration necessary for the treatment of the area of ​​the face to be treated. First activation zones 42a therefore correspond to the zones of the impregnation layer 4 arranged at the level of the conductive poles 241, 242, preferably the conductive poles 241, 242 of the first part 24a of the current generator 24, i.e. the part of the current generator 24 arranged on the active face 25 of the support layer 2. By "at the level", it is understood that first activation zones 42a therefore correspond to the zones of the impregnation layer 4 arranged opposite and / or on and / or above conductive poles 241, 242. Alterna . tively or additionally, as explained previously and as illustrated in [Fig.8], one or more impregnation films of the tab 3 act as a reservoir of activation product and thus allow the activation of the galvanic couples 240 of the current generator 24 when the tab 3 is folded onto the support layer 2.

[0139] Preferably, each first activation zone 42a does not extend beyond the conductive pole 241, 242 at which it is arranged to avoid any short circuit.

[0140] The first activation zones 42a are thus arranged in such a way that, when activation product is applied to the first activation zone 42a and the device 1 is folded so that the conductive poles 241, 242 of each galvanic couple 240 are arranged opposite each other, the first conductive pole 241 and the second conductive pole 242 of each galvanic couple 240 are correctly connected to allow an oxidation-reduction reaction. More precisely, at the time of activation (when the device is put into operation), the activation product will allow the first and second conductive poles 241, 242 to be brought into electrical contact.

[0141] According to a certain embodiment, for a galvanic couple 240, a first activation zone 42a comprises a zone of the impregnation layer 4 located opposite (i.e. covering) the whole of the first conductive pole 241 and / or second conductive pole 242 of the galvanic couple 240.

[0142] Preferably, in operation, it is preferable that activation product is also present between each electrode 22, 23 and the user's skin to facilitate the flow of the electric current between the device 1 and the skin. This also makes it possible to limit the risk of reddening of the skin upon contact with the electrodes 22, 23 and to increase the comfort of use. Furthermore, in the case where the activation product comprises an active agent for treating the skin, it is necessary to apply activation product between the skin and at least one of the electrodes 22, 23, preferably between the main electrode 22 and the skin, to ensure good absorption of the activation product (more precisely of an active ingredient contained in the activation product) at the level of at least one of the electrodes 22, 23 (preferably of the main electrode 22).Therefore, we understand the interest of the impregnation layer 4 at the electrodes 22, 23 which also makes it possible to play the role of reservoir of activation product, more precisely of active agent, for a certain period of time. Thus, a second activation zone 42b corresponds to the zone of the impregnation layer 4 arranged at the main electrode 22, as can be seen in [Fig. 12] for example. A third activation zone 42c corresponds to the zone of the impregnation layer 4 arranged at the counter-electrode 23.

[0143] By "at the level", it is understood that third and second activation zones 42b, 42c correspond respectively to the zones of the impregnation layer 4 arranged opposite and / or on and / or above the main electrode 22 and the counter-electrode 23.

[0144] Thus, the impregnation film 41 of the impregnation layer 4 has the particular role of being impregnated with an activation product advantageously comprising an active agent intended to be diffused into the skin by iontophoresis and / or electrostimulation. The impregnation film 41 is therefore manufactured from at least one porous material, that is to say a material which absorbs the activation product.

[0145] Preferably, the impregnation film 41 is made from a non-woven textile, for example non-woven cotton. A non-woven textile has the advantage of being absorbent and is generally hypoallergenic so that it can be brought into contact with the skin of a user without risk of skin reaction.

[0146] Furthermore, a non-woven textile has the advantage of being very flexible and therefore does not limit the flexibility of the device 1.

[0147] The impregnation film 41, and consequently the impregnation layer 4, preferably have a thickness greater than or equal to 100 μm, preferably greater than or equal to 800 μm, and less than or equal to 2 mm. The thickness of the impregnation film 41, and consequently of the impregnation layer 4, will in particular be chosen as a function of the desired absorption capacity of the impregnation layer 4.

[0148] The impregnation film 41 may be manufactured from materials adapted to the viscosity of the activation product. For example, if the activation product is very low in viscosity and therefore very liquid (as would be the case, for example, with physiological serum or saline solution), it would be desirable for the impregnation film 41 to be manufactured from a highly absorbent material to prevent, when an activation product is applied to the device 1, the activation product from spreading (by capillarity) in an undesired manner in the device 1 or from flowing out of the device 1 (for example, onto the ground). Conversely, if the activation product is very viscous (as would be the case, for example, with a cosmetic cream or gel), it would be desirable for the impregnation film 41 to be manufactured from a low-absorbent material to allow the impregnation film 41 to become sufficiently impregnated.

[0149] The impregnation layer 4 may comprise a single impregnation film 41 which covers the assembly comprising the main electrode 22, the counter-electrode 23 and the current generator 24. In this case, the impregnation layer 4 is said to be monolithic. For example, this embodiment, which is particularly simple and easy to implement during the manufacture of the device 1, is well suited in the case where the activation product has a high viscosity (it is therefore pasty, for example in the form of a cosmetic cream). Indeed, in this case, when the activation product is applied to the activation zone 42 (i.e. to all of this zone 42 or to part of this zone 42) of the impregnation layer 4, the activation product remains substantially on this activation zone 42 and does not spread in an undesirable manner to other zones of the impregnation layer 4, in particular to zones which are not activation zones 42.

[0150] In this case of a monolithic impregnation layer 4, the latter may comprise at least one capillary action limiting device, such as for example a groove, a throat or even a slot. Such a device makes it possible to cut capillary paths within the impregnation layer 4 and thus to locally limit the diffusion of the activation product within the impregnation layer 4 by capillarity. It is thus possible to control the diffusion of the activation product within this monolithic impregnation layer 4. This makes it possible to envisage the use of a relatively fluid activation product while simplifying the manufacturing method of the device 1. Advantageously, the impregnation layer comprises two capillary action limiting devices, arranged on either side of the current generator 24.

[0151] According to another embodiment illustrated in figures 2 and 14, the impregnation layer 4 comprises a plurality of impregnation films 41. In other words, the impregnation layer 4 is then not monolithic but comprises at least two, preferably three, impregnation films 41 distinct and separated from each other. In the example illustrated, the impregnation layer 4 comprises three impregnation films 41 including a first impregnation film 41a intended to cover the main electrode 22, a second impregnation film 41b intended to cover the counter-electrode 23 and a third impregnation film 41c intended to cover the current generator 24. Advantageously, the first, second and third impregnation films 41a, 41b, 41c are not in contact with each other.This embodiment is for example suitable in the case where the activation product has a low viscosity (it is therefore liquid, fluid, for example in the form of serum or solution). Indeed, in this case, when the activation product is applied to an activation zone 42 (i.e. to the entire zone 42 or to a part of this zone 42) of the impregnation layer 4, the activation product tends to spread. The fact that the impregnation films 41a, 41b and 41c are not in contact makes it possible to prevent the activation product from spreading undesirably to other zones of the impregnation layer 4, in particular to zones which are not activation zones 42.

[0152] In the case where the impregnation layer 4 comprises a plurality of impregnation films 41, the impregnation films 41 are not necessarily made of the same material. However, for reasons of simplicity and cost, it is possible use three separate but identical films (in the same material).

[0153] It should be noted that different activation products could be used depending on the different activation zones 42. Therefore, the impregnation films 41 could each be made of materials adapted to the viscosity of the activation product that they are intended to receive.

[0154] Preferably, at least one impregnation film 41 is not pre-impregnated. The pre-impregnation may allow the device 1 to be used by a user without any prior step other than applying the device 1 to the skin.

[0155] However, pre-impregnation may reduce the operating time of the device 1 for treating the user's skin. For example, this may result in premature activation of the current generator 24 if the corresponding activation area 42a is pre-impregnated. Thus, the current generator 24 and therefore the device 1 would have a reduced operating time since the current generator 24 would have already been operating for a certain period of time before the user applied it to his skin.

[0156] It is therefore preferred that the impregnation film(s) 41 of the impregnation layer 4 are not pre-impregnated. Consequently, it is preferred that the user impregnates the activation zones 42 as little time as possible before applying the device 1 to his skin. Indeed, it is particularly advantageous that the first or second conductive pole 244, 245 comprising the reducing agent (in this case zinc) is not pre-impregnated so as not to trigger the redox reaction before the actual use of the device 1.

[0157] As can be seen in [Fig. 14] in particular, the impregnation layer 4 has a shape corresponding to the shape of the support layer 2 of the device 1. More precisely, in the preferred embodiment where the impregnation layer comprises a plurality of impregnation films 41a, 41b, 41c, each of the first, second and third impregnation films 41a, 41b, 41c respectively has the same shape as each of the main electrode 22, counter-electrode 23 and current generator 24. More precisely, in the case of a drop-shaped support layer 2, the first impregnation film 41a has a drop shape, the second impregnation film 41b has a circular arc shape, the third impregnation film has a circular arc shape. In the case of the support layer 2 in the shape of a circle, the first impregnation film has a disc shape, the second impregnation film has a circular arc shape, the third impregnation film has a circular arc shape.It will thus be understood that the shape of each impregnation film corresponds to the shape of the area it is intended to impregnate. Stencil layer

[0158] As illustrated in Figures 12 and 13 (which do not illustrate the tab 3 of the device 1), the device 1 may comprise a stencil layer 6 at least partially covering the impregnation layer 4. The stencil layer 6 comprises at least one stencil film 61.

[0159] The stencil layer 6 comprises at least one permeable zone 62 adapted to allow electrically conductive activation product to pass only at the level of predefined zones of the impregnation layer 4 called “free zones 44”.

[0160] Preferably, the stencil layer 6 comprises a plurality of permeable zones 62 and to each permeable zone 62 of the stencil layer 6 corresponds a free zone 44 of the impregnation layer 4. In other words, the free zone 44 of a permeable zone 62 is the zone of the impregnation layer 4 at which the permeable zone 62 is located. By "at" is meant "facing", "above" and / or "on". The free zone 44 has a surface and a shape identical to the permeable zone 62. The permeable zone 62 makes the free zone 44 accessible to an activation product which would be applied to the permeable zone 62.

[0161] The stencil layer 6 has the role of allowing the activation of only the activation zones 42, and of protecting the other zones from the activation product. The stencil layer 6 aims to prevent the application of activation product to zones of the impregnation layer 4 which are not activation zones 42. This therefore allows the designers of the devices 1 to determine which zones will or will not be in contact with the activation product, regardless of the user's handling and skills. This results in great simplicity of use of the device 1 and great reliability.

[0162] Indeed, it is desired to avoid short circuits within the device 1 as much as possible, to limit the current generator 24 from “emptying” too quickly and to ensure that the current passes fully through the skin (treatment effectiveness). Typically, if an activation product were applied to the entire surface of the impregnation layer 4, and therefore the entire surface of the support layer 2 were in contact with an activation product, numerous short circuits would occur, the current preferring to pass through the activation product (the “simplest” path) rather than through the skin. It is therefore desired to precisely target the areas of the impregnation layer 4 on which the activation product must be applied to avoid as many short circuits as possible and to control and optimize the path of the electric current.

[0163] For this, the stencil layer 6 comprises permeable zones 62. The permeable zones 62 allow the circulation of activation product through the stencil layer 6, towards the impregnation layer 4 during an application of activation product on the stencil layer 6. The permeable zones 62 are for example made of a porous material.

[0164] The remainder of the stencil layer 6, i.e. the impermeable zones 63, are preferably made of a material which would prevent any circulation of activation product towards the impregnation layer 4 during an application of activation product on the stencil layer 6 at the level of these impermeable zones 63.

[0165] Advantageously, as can be seen in Figures 12 and 13, the permeable zones 62 are openwork zones, preferably formed by holes (or openings or cutouts) made in the stencil film 61. In other words, the permeable zones 62 are empty zones. A stencil film 61 is therefore openwork, i.e. perforated, at the level of a permeable zone 62. In other words, the permeable zones 62 reveal the free zones 44 of the impregnation layer 4. The permeable zones 62 are thus, in terms of shape, complementary to the free zones 44.

[0166] Each free zone 44 comprises at least one activation zone 42. A free zone 44 typically has a surface area smaller than or identical to that of a corresponding activation zone 42.

[0167] The free zones 44 are adapted to allow impregnation with activation product at the activation zones 42. By applying activation product to a permeable zone 62 and therefore at the level of a corresponding free zone 44, it is expected that the activation product will impregnate a corresponding activation zone 42. More precisely, the free zone 44 may be smaller than the activation zone 42 in the case of a liquid activation product. Indeed, in this case, it is expected that the activation product having reached the free zone 44 will spread (by capillarity) beyond the free zone 44 and impregnate at least the corresponding activation zone 42. Furthermore, the free zone 44 may have a size substantially identical to that of the activation zone 42 in the case of a viscous activation product, such as for example a gel or a cream for example cosmetic.Indeed, in this case, it is not expected that the activation product having reached the free zone 44 will spread beyond the free zone 44 so that it is preferred that the free zone 44 corresponds substantially to the activation zone 42.

[0168] Preferably, at least one free zone 44, called “first free zone 44a”, comprises at least a portion of the first activation zone 42a. In other words, a permeable zone 62, called “first permeable zone 62a”, is located opposite at least a portion of the first activation zone 42a.

[0169] Thus, at least one first permeable zone 62 is located opposite at least a part of a conductive pole 241, 242 located on the support layer 2. Advantageously, a first permeable zone 62a, and therefore a corresponding first free zone 44a, is located opposite each conductive pole 241, 242 of the support layer 2. In such a way, the stencil layer 6 is provided to allow the activation of each galvanic couple 240.

[0170] According to one embodiment, a first permeable zone 62a, and therefore a corresponding first free zone 44a, is only arranged opposite a part of a conductive pole 241, 242 and the length of the first permeable zone 62 (and therefore also of the first free zone 44a) is less than the length of the conductive pole 241, 242. The surface area of ​​the first permeable zone 62a, and therefore of the first free zone 44a, is thus less than the surface area of ​​the first activation zone 42a. This scenario is for example suitable when an activation product is not very viscous and therefore very liquid, such as for example a physiological serum or a saline solution. Indeed, it is sufficient in this case to initially apply the activation product to a first free zone 44a corresponding to a small part of the first activation zone 42a because the activation product will spread so as to impregnate at least the first activation zone 42a of the impregnation layer 4.

[0171] According to another embodiment illustrated in Figures 12 and 13, a first permeable zone 62a is arranged opposite at least 20% of the total surface area of ​​the first activation zone 42a. The corresponding first free zone 44a therefore has a surface area of ​​at least 20% of the total surface area of ​​the first activation zone 42a. This scenario is for example suitable when an activation product is viscous. Indeed, it is in this case necessary to initially apply activation product to the first free zone 44a which has a surface area of ​​at least 20% of the surface area of ​​the first activation zone 42a to impregnate at least the first activation zone 42a of the impregnation layer 4 because the activation product will spread little.

[0172] It is thus understood that the dimensioning of the permeable zones 62 of the stencil layer 6 is correlated, in particular, with the viscosity of the activation product. Indeed, the more viscous, pasty, thick the activation product is, as would be the case for example with a cream or a gel, the less it will spread (diffuse) in the impregnation layer 4, therefore it is appropriate to maximize the size of the permeable zones 62. Conversely, the more liquid, fluid the activation product is, the more it will spread (diffuse) in the impregnation layer 4, in particular by capillarity, therefore it is appropriate to minimize the size of the permeable zones 62.

[0173] In the example illustrated in Figures 12 and 13, the first permeable zones 62a are rectangular in shape.

[0174] Advantageously, the stencil layer 6 further comprises permeable zones 62 arranged opposite the main electrode 22 and / or the counter-electrode 23. The impregnation layer 4 therefore comprises corresponding free zones 44.

[0175] Preferably, a second permeable zone 62b is arranged opposite the second activation zone 42b which is arranged at the level of the main electrode 22. The impregnation layer 4 therefore comprises at least one second free zone 44b corresponding to the second permeable zone 62b located opposite said second free zone 44b.

[0176] Also preferably, a third permeable zone 62c is arranged opposite the third activation zone 42c which is arranged at the level of the counter-electrode 23. The impregnation layer 4 therefore comprises at least one third free zone 44c corresponding to the third permeable zone 62c located opposite said third free zone 44c.

[0177] Thus, an activation product can be applied to these permeable zones 62b, 62c so that the activation product impregnates the second free zone 44b and third free zone 44c and, consequently, impregnates the second activation zone 42b and third activation zone 42c to allow the circulation of electric current via the electrodes 22, 23 when the device 1 is applied to the skin of a user.

[0178] Preferably, the second permeable zone 62b has a shape similar to that of the main electrode 22. The second free zone 44b therefore has a shape similar to that of the main electrode 22. Also preferably, the third permeable zone 62c has a shape similar to that of the counter-electrode 23. The third free zone 44c therefore has a shape similar to that of the counter-electrode 23.

[0179] The stencil layer 6 preferably comprises a stencil film 61. The stencil layer 6 may also comprise a plurality of stencil films 61, each of which may comprise one or more permeable zones 62.

[0180] Whatever the embodiment of the stencil layer 6 detailed above, it is clear that the latter allows the user to apply activation product to the entire device 1, on the stencil layer 6, without having to worry about the areas to be activated or not. Indeed, it is the permeable areas 62 and the impermeable areas 63 of the stencil layer 6 which allow the activation product to pass through to the activation area(s) 42 or, on the contrary, prevent the activation product from reaching the other areas. In other words, the stencil layer 6 allows the activation product to be guided towards areas previously defined by the designers of the device 1, in this case the activation areas 42.

[0181] The stencil layer 6 is preferably adapted to be removed from the device 1 before the application of the device 1 to the skin of a user. Indeed, the stencil layer 6 aims in particular to allow the application of activation product to the free zones 44 of the impregnation layer 4 so as to allow the impregnation of the activation zones 42. Once the user has applied the activation product to the stencil layer 6 and indirectly to the free zones 44 of the impregnation layer 4, the stencil layer 6 can be removed.

[0182] This can in particular make it possible to discover the second and third activation zones 42b, 42c. Thus, according to one embodiment, the total surface of the electrodes 22, 23 can be applied in contact with the skin.

[0183] Furthermore, this makes it possible to keep on the device 1 only the activation product necessary for the operation of the device 1 and not the activation product which would have been applied to impermeable zones 63. Thus, it is guaranteed that no activation product remains on unwanted zones, which limits the risk of short circuits appearing when using the device 1.

[0184] The stencil layer 6 is preferably flexible. The stencil layer 6 is for example made of a flexible plastic such as polyethylene terephthalate (PET). The stencil layer 6 preferably has a thickness of less than 50 μm. The thickness of the stencil layer 6 is typically greater than 30 μm, preferably approximately equal to 40 μm.

[0185] Thus, the stencil layer 6 makes it possible, thanks to a remarkable combination of permeable zones 62 and impermeable zones 63 judiciously sized and positioned, to guide (i.e. to let pass) the activation product only towards the activation zones 42 and therefore towards at least a part of a conductive pole 241, 242 of a galvanic couple 240, and advantageously the main electrode 22 and the counter electrode 23; and on the contrary, to preserve the other zones (other than the activation zones 42) from the activation product.

[0186] Alternatively, the device 1 does not comprise a stencil layer 6. In particular, when the tab 3 has pre-impregnated activation product, the user simply needs to apply activation product to the electrodes 22, 23. The user does not need to precisely apply activation product to the conductive poles 241, 242 of the current generator 24 since the activation product intended to be applied to the conductive poles 241, 242 is already pre-impregnated on the tab 3. Contact method

[0187] Advantageously, the device 1 comprises contact and holding means to ensure contact between the device 1 and the user's skin and to hold the device 1 on the skin despite possible external disturbances (wind, clothing, hair, etc.).

[0188] The contact means comprise, for example, an elastic band. For example, in the case of a device 1 taking the form of a face mask, the device 1 may comprise an elastic band which would surround the head to press the device 1 against the face.

[0189] Preferably, the contact means comprise an adhesive layer. The adhesive layer is preferably disposed between the impregnation layer 4 and the layer stencil 6. The adhesive layer comprises at least one adhesive film.

[0190] The adhesive layer preferably comprises at least one permeable zone adapted to allow an activation product to pass only at the level of at least one activation zone 42. The permeable zone is preferably perforated, for example by being formed by a hole (or an opening) made in the adhesive film.

[0191] The adhesive layer preferably has a shape similar to the stencil layer 6.

[0192] Preferably, the adhesive layer covers the impregnation layer 4 located on the current generator 24 (except the free zones 44). The adhesive layer is arranged on and in contact with at least a portion of the impregnation layer 4. The adhesive layer does not cover the portions of the impregnation layer 4 located opposite the main electrode 22 and the counter electrode 23, in order to allow good current flow between the electrodes 22 and 23 and the skin.

[0193] Thus, the adhesive layer ensures that the device 1 is held on the skin while isolating the galvanic couples 240 from the skin and allowing the activation of each galvanic couple 240 via the free zones 44. The galvanic couples 240 being isolated from the skin by the adhesive layer, the risk of short-circuiting within the latter is eliminated and the risk of seeing redness appear on the skin is reduced.

[0194] The adhesive layer has an external adhesive surface intended to come into contact with the user's skin and to ensure the attachment of the device 1 to the skin for the entire duration of the treatment.

[0195] Advantageously, the stencil layer 6 constitutes a cover for the adhesive layer. In other words, when the stencil layer 6 is removed from the device 1, the adhesive external surface of the adhesive layer is uncovered and can then be stuck to the user's skin.

[0196] The adhesive layer therefore also remarkably allows the stencil layer 6 to be held on the device 1 before the stencil layer 6 is removed from the device 1. The stencil layer 6 and the adhesive layer therefore play a respective role towards one another: the stencil layer 6 protects the adhesive outer surface of the adhesive layer, in particular from dust, thus preserving its adhesive power, while the adhesive outer surface ensures the holding of the stencil layer 6 while waiting for the user to remove it during the actual use of the device 1.

[0197] The adhesive layer advantageously also has an internal adhesive surface intended to come into contact with the impregnation layer 4, and thus ensure its attachment to the latter. Preferably, the adhesive layer is then formed by a double-sided adhesive film, that is to say a film having an external adhesive surface intended to be in contact with the skin and an internal adhesive surface intended to be in contact with the impregnation layer 4.

[0198] The adhesive layer preferably has a thickness of less than 150 μm. The thickness of the adhesive layer is, for example, approximately equal to 140 μm.

[0199] Consequently, the total thickness of the device 1 (i.e. of the stack of layers previously described) is less than 3 mm, preferably even less than 2 mm. The device 1 is thus flexible and can therefore conform to the shape of the area of ​​the body on which it will be placed. Method of use

[0200] A method of using the device 1 will be described. Firstly, the user equips himself with the device 1.

[0201] It also obtains, if necessary, an electrically conductive activation product.

[0202] In a step a), the user applies activation product to the device 1. The user preferably applies activation product to the electrodes 22, 23. Furthermore, if no part 24a, 24b of the current generator 24 has activation product, the user applies activation product at least to one of the conductive poles 241, 242 of each galvanic couple 240.

[0203] If the device 1 already has activation product, step a) is not necessary.

[0204] In a step b), in the case where the device 1 comprises a primary fold line L1 and at least one of a secondary fold line L2 and a tertiary fold line L3, the support film 21 is folded along the primary fold line L1 and along one of the secondary fold line L2 and the tertiary fold line L3.

[0205] In the case where the device 1 comprises a tab 3, the user arranges the tab 3 on the support layer 2 so that the protective film 31 covers the first part 24a of the current generator 24 and the covering face 31 of the tab 3 is thus opposite the active face 25.

[0206] In both cases, the first part 24a of the current generator 24 is thus arranged opposite the second part 24b of the current generator 24, which causes an oxidation-reduction reaction within the galvanic couples 240. This allows the activation of the galvanic couples 240 and therefore of the current generator 24.

[0207] In a step c), the device 1 is applied to the user's skin so that the electrodes 22 and 23 are in contact with the user's skin.

[0208] An electric current is generated and passes through the user's PE skin as for example illustrated in [Fig.2].

Claims

Claims

1. Device (1) for treating the skin of a user by iontophoresis and / or electrostimulation intended to be applied to the skin of the user, the device (1) comprising: - a support layer (2) comprising a support film (21) and having an active face (25) intended to be opposite the skin, the active face (25) comprising a main electrode (22) and a counter-electrode (23), - a current generator (24) electrically connected to the main electrode (22) on the one hand and to the counter-electrode (23) on the other hand, the current generator (24) comprising at least one galvanic couple (240), the galvanic couple (240) being formed of a first conductive pole (241) forming a cathode and a second conductive pole (242) forming an anode, the support layer (2) comprising at least a first part of the current generator (24),the first conductive pole (241) and the second conductive pole (242) being arranged at a distance and separated from each other and being intended to be arranged opposite each other for establishing an electrical connection between them by means of an electrically conductive activation product.,

2. Device according to claim 1, wherein the support layer (2) comprises at least one galvanic couple (240), the support film (21) being adapted to be folded so that the first conductive pole (241) and the second conductive pole (242) of said galvanic couple (240) are arranged opposite each other for establishing the electrical connection so that, when the device is applied to the user's skin, the current generator (24) is not in contact with the skin.

3. A device according to any one of claims 1 and 2, wherein the galvanic couple(s) (240) are arranged on the active face (25) of the support layer (2), the support film (21) comprising a primary fold line (L1) which divides the support film (21) into two parts and being provided to be folded along the primary fold line (L1) and, wherein, for each galvanic couple (240), one of the first conductive pole (241) and the second conductive pole (242) is arranged on one side of the primary fold line (L1) and the other of the first conductive pole (241) and the second conductive pole (242) is arranged on the other side of the primary fold line (L1).

4. Device according to claim 3, in which the galvanic couples (240) are connected in series, the first conductive pole (241) of one of the galvanic couples (240) being electrically connected to the second conductive pole (242) of an adjacent galvanic couple (240), said two conductive poles being arranged on the same side of the primary fold line (L1).

5. Device according to claim 4, wherein the first conductive pole (241) of a galvanic couple (240) is connected to the second conductive pole (242) of an adjacent galvanic couple (240) on one side of the primary fold line (L1) and the second conductive pole (242) of the galvanic couple (240) is connected to a first conductive pole (241) of another adjacent galvanic couple (240) on the other side of the primary fold line (L1).

6. Device according to any one of claims 1 to 5, comprising one or more adhesive films intended to be arranged on the support film (21) on one side and / or on the other side of the primary fold line (L1) so as to, when the support film (21) is folded along the primary fold line (L1), maintain the electrical connection between the first conductive pole (241) and the second conductive pole (242).

7. A device according to any one of claims 1 to 6, wherein the support film (21) comprises a secondary fold line (L2) arranged between the current generator (24) and the main electrode (22) and is adapted to be folded along the secondary fold line (L2).

8. A device according to any one of claims 1 to 7, wherein the support film (21) comprises a tertiary fold line (L3) arranged between the current generator (24) and the counter electrode (23) and is adapted to be folded along the tertiary fold line (L3).

9. Device according to any one of claims 1 to 8, comprising a tab (3) comprising a protective film (30) and comprising a second part of the current generator (24) arranged on the first face (31), different from the first part of the current generator (24), the first part comprising one of the first conductive pole (241) and the second conductive pole (242) of each galvanic couple (240) and the second part comprising the other of the first conductive pole (241) and the second conductive pole (242) of each galvanic couple (240), each first conductive pole (241) or second conductive pole (242) of the second part being provided for, when the protective film (30) of the tab (3) covers the first part, be arranged opposite the first conductive pole (241) or second conductive pole (242) of the first part belonging to the corresponding galvanic couple (240).

10. Device according to claim 9, wherein the current generator (240) comprises a plurality of galvanic couples (240) comprising a first galvanic couple (240a) and a last galvanic couple (240d), the first conductive pole (241) of the first galvanic couple (240a) being electrically connected to the main electrode (22) and the second conductive pole (242) of the last galvanic couple (240d) being electrically connected to the counter electrode (23), or the second conductive pole (242) of the first galvanic couple (240a) being electrically connected to the main electrode (22) and the first conductive pole (241) of the last galvanic couple (240d) being electrically connected to the counter electrode (23), the conductive poles respectively connected to the electrode (22) and to the counter electrode (23) being included in the first part of the current generator (24) arranged on the active face (25) of the support layer (2),the galvanic couples (240) being connected in series, two conductive poles of different adjacent and electrically connected galvanic couples both belonging either to the first part of the current generator (24) or to the second part of the current generator (24).,

11. Device according to any one of claims 1 to 10, in which the main electrode (22) and the counter electrode (23) are made of silver and / or silver chloride, each first conductive pole (241) forming a cathode comprises silver and / or silver chloride and each second conductive pole (242) forming an anode comprises zinc.

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