Skin treatment device

Abstract

This description relates to a device (1) for cosmetic treatment of a user's skin (100) by iontophoresis and / or electrostimulation, the device (1) being intended to be applied to the user's skin (100) and comprising: a first support (201); a main electrode (22); a counter electrode (23); a second support (202); and a current generator (24); wherein the first support (201) and the second support (202) are configured to be assembled together, such that the current generator (24) is electrically connected to the main electrode (22) and the counter electrode (23). Figure for the abstract: Fig. 3

Description

Title of the invention: Skin treatment device Technical field

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

[0002] Iontophoresis, electroporation and / or electrostimulation allow the skin to be treated using electric current. In this regard, skin treatment devices, such as facial care masks, are designed to deliver an electric current to the skin of a user.

[0003] These devices typically comprise a polymer support matrix on which current generators are arranged distributed over all or part of the surface of the support matrix intended to come into contact with the skin.

[0004] This direct contact between the current generators and the skin, however, limits the density of the electric current generated by the current generators and / or tends to disperse this electric current. In other words, the electric current is not correctly delivered to the skin, whether in terms of intensity and / or location. In fact, short circuits may occur, in particular between the current generators and the skin. GENERAL STATEMENT

[0005] An aim of the present disclosure is to improve the operation of devices for treating the skin by iontophoresis and / or electroporation and / or electrostimulation, in particular to improve their effectiveness.

[0006] Another aim of the present disclosure is to make the use of devices for treating the skin by iontophoresis and / or electroporation and / or electrostimulation easier and more accessible to all.

[0007] Another aim of the present disclosure is to improve the storage and durability of devices for treating the skin by iontophoresis and / or electroporation and / or electrostimulation.

[0008] Another aim of the present disclosure is to propose a skin treatment device which is particularly ergonomic and intuitive to use.

[0009] Another aim of the present disclosure is to improve the targeting of the treatment carried out by devices for treating the skin by iontophoresis and / or electroporation and / or electrostimulation.

[0010] To this end, according to one aspect of the present disclosure, there is provided a device for cosmetic treatment of the skin of a user by iontophoresis and / or electrostimulation, the device being intended to be applied to the skin of the user and comprising: a first support having an active face intended to face the user's skin during the cosmetic treatment, and a passive face opposite the active face; a main electrode extending projecting from the active face of the first support and intended to be associated with a cosmetic substance during the cosmetic treatment; a counter-electrode extending in projection from the active face of the first support; a second support distinct from the first support and having a passive face intended to face the skin during the cosmetic treatment, and an active face opposite the passive face; and a current generator comprising at least one galvanic couple extending in projection from the active face of the second support, the galvanic couple consisting of an anode and a cathode; wherein the first support and the second support are configured to be assembled to each other, such that the current generator is electrically connected to the main electrode and the counter electrode.

[0011] A passage may be provided through the first support and extend from the active face to the passive face of the first support, the first support and the second support being configured to be assembled to each other by inserting at least a portion of the second support within the passage. The passage may be an orifice passing through the first support. The passage may be a recess open on one side of the first support.

[0012] The first support and the second support may be configured to be fixedly assembled. The first support and the second support may be configured to be removably assembled.

[0013] The device may further comprise a first electrical contactor and a second electrical contactor, the first electrical contactor being intended to be electrically connected to the main electrode and the second electrical contactor being intended to be electrically connected to the counter-electrode, when the first support and the second support are assembled to each other, each of the first electrical contactor and the second electrical contactor extending in projection from the active face of the second support and being electrically connected to the current generator. The first electrical contactor may be intended to be in contact with a portion of the main electrode and to extend opposite the active face of the first support, and the second electrical contactor being intended to be in contact with a portion of the counter-electrode and to extend opposite the active face of the first support, when the first support and the second support are assembled to each other.

[0014] The current generator may comprise a plurality of galvanic couples electrically connected in series, each of the plurality of galvanic couples extending projecting from the active face of the second support and consisting of an anode and a cathode.

[0015] The device may further comprise a non-woven fabric film positioned on at least one of the main electrode and the counter electrode while being further from the first support than the at least one of the main electrode and the counter electrode in a direction orthogonal to the active face of the first support.

[0016] The device may further comprise a non-woven textile film positioned on the at least one galvanic couple while being further from the second support than the galvanic couple in the direction orthogonal to the active face of the second support.

[0017] The device may further comprise an adhesive element extending projecting from the active face of the first support and configured to fix the first support to the skin of the user during the cosmetic treatment.

[0018] The device may further comprise an adhesive element extending projecting from the passive face of the second support and configured to fix the second support to the skin of the user during the cosmetic treatment.

[0019] One of the anode and the cathode may comprise silver and the other of the anode and the cathode comprises zinc.

[0020] According to another aspect of the present disclosure, there is provided a method of manufacturing a device according to the present disclosure, the method comprising assembling the first support to the second support so as to electrically connect the current generator to the main electrode and to the counter electrode.

[0021] According to another aspect of the present disclosure, there is provided a method of using a device according to the present disclosure, the method comprising: applying an electrically conductive activation product to a galvanic couple of the current generator of the device so as to cause an oxidation-reduction reaction between the cathode and the anode of the galvanic couple; the association of a cosmetic substance with the main electrode of the device; and the application of the device to the skin of a user so that an electric current generated following the oxidation-reduction reaction circulates within the skin of the user, via the main electrode and the counter-electrode. DESCRIPTION OF FIGURES

[0022] Other features, aims and advantages will emerge from the following description, which is purely illustrative and not limiting, and which must be read in conjunction with the attached drawings in which:

[0023] [Fig.l] schematically illustrates a disassembled bottom view and a disassembled top view of a device for treating skin.

[0024] [Fig.2] is a schematic sectional view of a device for treating skin.

[0025] [Fig. 3] is a schematic assembled side view of the device of [Fig. 1], facing the skin.

[0026] [Fig.4] is a schematic sectional view of a portion of a galvanic couple current generator.

[0027] [Fig.5] is a flowchart illustrating the steps in manufacturing a device for skin treatment.

[0028] Throughout the figures, similar elements bear identical references. DETAILED DESCRIPTION

[0029] Device

[0030] A device 1 for treating the skin 100 of a user, by iontophoresis (or ionophoresis) and / or electrostimulation and / or electroporation, is intended to be applied to the skin 100 of the user. The device 1 can be applied to any dermal part of the user's body. Preferably, the device 1 is intended to be applied to the user's face. In fact, the device 1 is remarkably well suited for particular areas of the face, which are often the subject of a user's desire to be treated.

[0031] The device 1 may have different shapes depending on the area of ​​the user's skin 100 on which it is designed to be applied. For example, in one embodiment, the device 1 may be intended to be applied to the temple and thus have a general drop shape. Thus, the contours of the device 1 are rounded and a first portion of the device 1, when viewed from above, is wider than a second portion of the device 1. In one embodiment, the device 1 may be intended to be applied to the cheekbone and thus have a circular shape. Thus, when viewed from above, the device 1 forms a disc. In one embodiment, the device 1 may be intended to be applied to the forehead and thus have a triangular shape.Thus, each area of ​​the face can have a device 1 particularly well adapted to the shape of the area in question, which increases the comfort of use, the ergonomics and the effectiveness of the treatment. Other shapes are of course conceivable, for example 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.

[0032] The device 1 advantageously allows a cosmetic treatment of the skin 100, for example by activating a cosmetic substance and / or by optimizing and / or improving its effectiveness, that is to say so that at least one active agent contained in the cosmetic substance is capable of being activated or of having its effectiveness optimized and / or improved by the device 1, in order to increase the effectiveness of the cosmetic treatment of the skin 100. The device 1 can 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 100, muscle pain, muscle cramps, joint stiffness, etc. To this end, the device 1 can then make it possible to improve the diffusion of an analgesic through the skin 100.Different methods are possible to do this, typically the generation of microcurrents, for example iontophoresis and / or electrostimulation and / or electroporation.

[0033] 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 the activation product to 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 of ​​the device 1. 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, the device 1 is not activated, thus preserving its lifespan.

[0034] The activation product may comprise the active agent for the treatment of the skin 100, which allows a cosmetic treatment of the skin 100, preferably non-therapeutic, and the effectiveness of which is increased by the device 1, thanks to the electric currents that it generates. 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 100 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. Preferably, the 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.

[0035] Supports

[0036] The device 1 comprises two supports 201, 202 configured to be assembled together to the other, in particular to operate the device 1. In this regard, the supports 201, 202 may be in the form of a kit intended to be mounted by the user, for example when starting the treatment. This facilitates the storage and transport of the device 1, without risk of putting the device 1 into operation outside of a treatment, or when the device 1 is not in contact with the skin 100.

[0037] Each of the supports 201, 202 is preferably in the form of a layer. The first support 201 has the same shape as the device 1, for example being a drop-shaped support, a circular support or a triangular support. The shape of the second support 202 depends on its method of assembly with the first support 201.

[0038] The first support 201 has an active face 2011 intended to face the skin 100 of the user during the treatment, and a passive face 2012 opposite the active face 2011. The passive face 2012 is intended to face the environment outside the skin 100 of the user during the treatment.

[0039] The second support 202 also has an active face 2021 and a passive face 2022, opposite each other. However, it is the passive face 2022 of the second support 202 which is intended to face the skin 100 during the cosmetic treatment, while the active face 2021 of the second support 202 is intended to face the environment outside the skin 100 of the user during the treatment.

[0040] Thus, once the supports 201, 202 are assembled together, the active face 2011 of the first support 201 forms a continuity, for example by flushing, with the passive face 2022 of the second support 202, while the passive face 2012 of the first support 201 forms a continuity, for example by flushing, with the passive face 2012 of the first support 201. Insofar as it is the active face 2011, 2021 of each support 201, 202 which is intended to support the active components of the device 1, this configuration advantageously makes it possible to distribute these components on different faces of the device 1, which improves its size. On the other hand, moving certain active components of the device 1 to a face which is not intended to be in contact with the skin 100, in this case the active face 2021 of the second support 202, makes it possible to better protect the skin 100.

[0041] The first support 201 and the second support 202 can be assembled in a fixed manner, typically by gluing or welding, or in a removable manner, typically by plastic deformation of portions of the supports 201, 202, for example by clipping or force deformation, or by friction. The fixed assembly makes it possible to secure the use of the device 1. The removable assembly makes it possible to reuse all or part of the device 1 as many times as necessary.

[0042] In one embodiment, the assembly is implemented by means of a passage 203 formed through the first support 201. The passage 203 extends from the active face 2011 to the passive face 2012 of the first support 201. The second support 202 is then configured to be inserted, at least in part, within the passage 203 to be assembled to the first support 201. In other words, the second support 202 cooperates with the passage 203 to assemble with the first support 201, so that, once the supports 201, 202 are assembled, the second support 202 is positioned opposite the passage 203. In any event, the second support 202 has a shape complementary, at least in part, to the passage 203, in order to close the passage 203 once the supports 201, 202 are assembled together.

[0043] The passage 203 may be an orifice passing through the first support 201, that is to say it may be closed because it is surrounded by material. Alternatively, the passage 203 may be a recess made at one side of the first support 201, while being open. The use of a through orifice or a recess depends on the configuration and the shape of the device 1, but also on the area of ​​the user's skin 100 intended to be treated by the device 1.

[0044] The passage 203 can be provided by any appropriate means within the first support 201, typically by cutting the first support 201, by melting a portion of the first support 201, or even by providing a mold delimiting the passage 203 for the manufacture of the first support 201.

[0045] The use of a passage 203 provided in the first support 201 to carry out the assembly between the supports 201, 202 has the advantage of being simple and practical for the user. The shape of the passage 203 in fact acts as a keying device during assembly, which limits the risks of assembly failure, or even breakage. Furthermore, the manufacture of the passage 203 is simple and inexpensive to implement. The assembly by cooperation of the second support 202 with the passage 203 provided through the first support 201 can also be implemented in a fixed manner (e.g., by gluing) or removable manner (e.g., by clipping, force deformation, friction).

[0046] Each of the supports 201, 202 comprises at least one support film 21. The support films 21 and, consequently, the device 1 are sufficiently flexible to be able to adapt to the shapes and reliefs of the skin 100 of the area to be treated, and in particular to the cheekbones, the temple, and the forehead. The support films 21 are preferably electrically insulating, that is to say they do not allow the passage of electric current. This makes it possible to avoid any risk of short circuit within the device 1, by preventing an electric current from circulating in the support films 21.

[0047] The support films 21 are, for example, made of a flexible plastic such as polyurethane (PU) or polyethylene terephthalate (PET). Preferably, the support films 21 have 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 pm or 80 pm. Indeed, such thicknesses allow the support films 21, and therefore the device 1, to conform well to the skin area 100 on which they are intended to be placed.

[0048] Each of the supports 201, 202 may comprise a plurality of support films 21 assembled to each other, for example by gluing. Alternatively, each support 201, 202 may comprise a single monolithic support film 21.

[0049] Electrodes

[0050] The device 1 comprises at least one main electrode 22 and at least one counter-electrode 23, each extending in projection from the active face 2011 of the first support 201.

[0051] The electrodes 22, 23 are intended to be applied opposite the skin 100 of the user and are adapted to allow the circulation of an electric current in the skin 100 of the user, when the device 1 is placed in contact with the skin 100 of the user. Indeed, the skin 100 of the user behaves as a consumer of electric current, in particular as an electrical resistor. The skin 100 of a mammal, in particular the human skin 100, typically behaves as a resistor of 10 kΩ. For this purpose, the main electrode 22 and / or the counter electrode 23 are formed at least of one metal, a good electrical conductor.

[0052] The electrodes 22, 23 are intended to be in contact, directly or indirectly, with the skin 100. During indirect contact, an element, such as an activation product, an absorbent layer and / or a non-woven textile film, is typically interposed between the electrode 22, 23 and the skin 100.

[0053] 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 active agent when the main electrode 22 covers a portion of the user’s skin 100 to which substance containing the agent is applied. In operation, the active agent is thus specifically absorbed by the skin 100 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. 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.).

[0054] 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.

[0055] 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 substance used in combination with the device 1. In particular, the main electrode 22 is adapted to be an anode for certain types of products such as a vitamin C-based cream. while the main electrode 22 is adapted to be a cathode for certain other types of products.

[0056] More specifically, the substance associated with the main electrode 22 may comprise molecules that are positively or negatively charged at a given pH. If the main electrode 22 has the same polarity as the polarity of the molecules, the molecules are repelled by the main electrode 22 and thus pushed towards the skin 100 of the user. 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 100 of vitamin C molecules contained in a product therefore preferably has a main electrode 22 forming an anode.

[0057] 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 22. This makes it possible to give the user a visual indication of the main electrode 22 to help him position the latter correctly on the area of ​​the skin 100 that he wishes to treat, without however degrading the electrical conductivity of the main electrode 22.

[0058] The counter-electrode 23 is designed to have a polarity opposite to that of the main electrode 22 during operation of the device 1, i.e. when current flows through the skin 100, via the electrodes 22, 23. The counter-electrode 23 is therefore a cathode if the main electrode 22 is an anode, and the counter-electrode 23 is an anode if the main electrode 22 is a cathode.

[0059] 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. Silver and silver chloride have the advantage of being hypoallergenic and of interacting well with the skin 100. In addition, silver and silver chloride have the advantage of being good conductors of electricity. Silver chloride is less subject 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.

[0060] Preferably, the main electrode 22 and the counter electrode 23 are each composed of 55% silver and 45% silver chloride.

[0061] Alternatively, the main electrode 22 and / or the counter electrode 23 are made of carbon. Carbon is conductive and not very oxidizable.

[0062] The main electrode 22 and the counter electrode 23 may also comprise alloys.

[0063] Advantageously, the main electrode 22 and the counter-electrode 23 are printed on the first support 201, typically on the support film 21, using conductive inks, and preferably metallic inks. In particular, the electrode The main electrode 22 and the counter electrode 23 are preferably printed on the support film 21 by screen printing.

[0064] Current generator

[0065] The device 2 further comprises at least one current generator 24 extending projecting from the active face 2021 of the second support 202, the supports 201, 202 being configured to be assembled to one another, so that 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, thus creating an electrical potential differential between the latter. To the extent that only the electrodes 22, 23 are provided to be in contact with the skin 100 during the treatment, the control of the density of the current flowing through the skin 100 is improved, the efficiency of the current generator 24 is increased, and the risk of short circuit is reduced.Furthermore, by avoiding contact between the current generator 24 and the skin 100, since the latter does not extend beyond the face of the device 1 intended to come into contact with the skin 100, it is possible to target the treatment areas more effectively, thanks to electrodes 22, 23 of appropriate size and shape.

[0066] The device 1 is in operating condition when it is applied to the skin 100 of a user and when the current generator 24 generates an electric current. Thus, in operation, the device 1 generates a potential differential between the electrodes 22, 23, then an electric current when the device 1 is applied to the skin 100.

[0067] In operation, the electric current generated by the current generator 24 flows between the electrodes 22, 23 and in the skin 100 of the user. More precisely, the electric current flows via the current generator 24 to the main electrode 22, then penetrates the skin 100 of the user to reach the counter-electrode 23. The current can also flow in a reverse direction.

[0068] 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 separated from each other by a free space 243. The galvanic couple 240 being isolated from the skin 100 by the second support 202, the risk of short circuit within it is eliminated and the risk of seeing redness appear on the skin 100 is reduced.

[0069] The free space 243 is preferably insulating, i.e. it does not allow the passage of electric current. This can for example be made possible by the fact that the support film 21 is insulating and that the free space 243 consists of an area of ​​the support film 21 on which no material is printed.

[0070] Alternatively, an insulating material could be arranged on the support film 21 at the level of the free space 243.

[0071] Preferably, the first conductive pole 241 of a galvanic couple 240 and the second conductive pole 242 of a galvanic couple 240 are separated by a distance of between 0.5 mm and 5.0 mm, preferably between 1.0 mm and 3.0 mm, for example equal to 2.0 mm. In other words, the free space 243 has a length of between 0.5 mm and 5.0 mm, preferably between 1.0 mm and 3.0 mm, for example equal to 2.0 mm.

[0072] The free space 243 is intended to be filled, at the time of activation, that is to say of putting into operation, of the device 1, by an electrically conductive activation product to connect together the first conductive pole 241 and the second conductive pole 242 of the same galvanic couple 240.

[0073] 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.

[0074] 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, in fact, thus formed.

[0075] 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 circulate via the activation product towards the first conductive pole 241. In fact, the activation product between the first conductive pole 241 and the second conductive pole 242 allows the circulation of electrons and the formation of an electrical circuit.

[0076] 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, since there is no longer any need for a power outlet, external battery, etc.

[0077] The materials constituting the first conductive pole 241 and the second conductive pole 242 advantageously comprise electrically conductive materials, typically metals.

[0078] The first conductive pole 241, forming a cathode, advantageously comprises silver and / or silver chloride. Preferably, the first conductive pole 241 is made of silver and / or silver chloride.

[0079] The second conductive pole 242, forming 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 oxidation-reduction chemical reaction and the second conductive pole 242, the zinc ink in this case, is intended to be consumed during use of the device 1.

[0080] 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-.

[0081] The electrons flow from the second conductive pole 242 to the first conductive pole 241. 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.

[0082] 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.

[0083] The galvanic couples 240 may also comprise alloys.

[0084] Depending on the nature of the main electrode 22 (anode or cathode), the main electrode 22 is intended to be 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, following the assembly of the supports 201, 202.

[0085] 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 of the same polarity as the first or second conductive pole 241, 242.

[0086] 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.

[0087] Connector

[0088] Once the supports 201, 202 are assembled, the electrodes 22, 23 are electrically connected to the current generator.

[0089] More precisely, one of the electrodes 22, 23 is then electrically connected to a first conductive pole 241 by a first connector 244, while the other of the electrodes 22, 23 is electrically connected to a second conductive pole 242 by a last connector 245. 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.

[0090] In one embodiment, each of the connectors 244, 245 comprises, on the one hand, an electrical contactor 2440, 2450 extending projecting from the active face 2021 of the second support 202 and, on the other hand, a portion 2441, 2451 of one of the electrodes 22, 23. Alternatively, the electrodes 22, 23 may also have their own electrical contactor 2441, 2451, extending projecting from the active face 2011 of the first support 201 and to which they are electrically connected, each electrical contactor 2441, 2451 of one of the electrodes 22, 23 forming, with the electrical contactors 2440, 2450 of the second support 202, one of the connectors 244, 245.

[0091] The electrical contactors 2440, 2450 of the second support 202 are therefore electrically connected to the current generator 24 and intended to be electrically connected to the electrodes 22, 23 once the supports 201, 202 are assembled together. For this, each electrical contactor 2440, 2450 is intended to be in contact with the portion 2441, 2451 of the electrode 22, 23 (or the electrical contactor 2441, 2451 of the electrode 22, 23) corresponding to form a connector 244, 245. Furthermore, each electrical contactor 2440, 2450 of the second support 202 is intended to extend opposite the active face 2011 of the first support 201 once the supports 201, 202 are assembled together. In other words, the connectors 244, 245 extend opposite both the passage 203 and the active face 2011 of the first support 201, when the supports 201, 202 are assembled together. In this regard, the electrical contactors 2440, 2450 of the second support 202 may each extend projecting from a lateral extension of the second support 202, each lateral extension being provided to face the active face 2011 of the first support 201, and not the passage 203 provided through the first support 201, when the supports 201, 202 are assembled together.

[0092] The connectors 244, 245 advantageously comprise carbon, and are preferably made of carbon. A carbon connector 244, 245 comprises carbon but may additionally comprise other materials, preferably conductive materials. A connector 244, 245 comprising carbon allows the flow of an electric current. A carbon connector 244, 245 advantageously comprises a carbon strip, typically connecting the electrical contactor 2441, 2451 to one of the electrodes 22, 23 on the one hand and to the current generator 24 on the other hand. A carbon connector 244, 245 preferably has a length of less than 5.0 mm and greater than 1.0 mm and a width of the order of 2.0 mm. The length of a 244, 245 carbon connector is preferably less than 5.0 mm to allow good current conductivity, a carbon connector that is too long having significant resistance.In case a connector is required over a longer distance, in particular greater than 5.0 mm, another, better conducting material is instead used, preferably the material used for the main electrode 22 or the counter electrode 23.

[0093] Preferably, the different portions of the connector 244, 245 are printed on the supports 201, 202, preferably on the support film 21, using a conductive ink comprising carbon, preferably by screen printing.

[0094] The main electrode 22 and the counter electrode 23 may be electrically connected to the current generator 24, once the supports 201, 202 are assembled to each other, 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.

[0095] In one embodiment, the first connector 244 comprises a material identical to a material comprised 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.

[0096] In one embodiment, the counter-electrode 23 is intended to be connected to the first conductive pole 241 once the supports 201, 202 are assembled together, the counter-electrode 23 and the first conductive pole 241 are made of silver and / or chloride of silver and the first connector 244 which connects the counter electrode 23 and the first conductive pole 241 once the supports 201, 202 are assembled together, 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 connected by a first connector 244 of the same material. The printing of the counter electrode 23, the first conductive pole 241 and the first connector 244 on the support film 21 is thus facilitated and does not require a different material for the first connector 244.

[0097] Furthermore, in one embodiment, the main electrode 22 is intended to be 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.

[0098] Advantageously, the current generator 24 comprises a plurality of galvanic couples 240, each extending in projection from the active face 2021 of the second support 202. The main electrode 22 is then provided to be connected to a conductive pole 241, 242 of a galvanic couple 240 different from the galvanic couple 240 of which a conductive pole 241, 242 is provided to be connected to the counter-electrode 23. More precisely, a conductive pole 241, 242 of a first galvanic couple 240 is provided to be electrically connected to the main electrode 22 and a conductive pole 241, 242 of a last galvanic couple 240 is provided to be electrically connected to the counter-electrode 23, once the supports 201, 202 are assembled together.

[0099] The current generator 24 may comprise a plurality of galvanic couples 240 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.

[0100] 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.

[0101] More precisely, two adjacent galvanic couples 240, 240 are connected by connecting the second conductive pole 242 of one galvanic couple 240 and the first conductive pole 241 of the other galvanic couple 240.

[0102] 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 metals. electrically conductive. However, it is preferable to use carbon 246 couple connectors for its low cost, ease of implementation and safety for skin 100.

[0103] Preferably, 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, the torque connector 246 extending between the second support 202 and the at least one conductive pole 241, 242.

[0104] 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 an arrangement makes it possible to optimize the passage 203 of current between two adjacent galvanic couples 240 without impacting the redox reaction, or even by optimizing it.

[0105] 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 area under a conductive pole 241, 242.

[0106] In one embodiment, the solid area of ​​the torque connector 246 corresponds to 100% of the surface area of ​​a second conductive pole 242. In one embodiment, the surface area of ​​a second conductive pole 242 is greater than the solid area of ​​the torque connector 246, i.e. the second conductive pole 242, for example made of zinc, covers the torque connector 246, for example made of carbon, and protrudes from the torque connector 246. This ensures that, despite manufacturing tolerances, the second conductive pole 242, for example made of zinc, completely covers the torque connector 246, for example made of carbon, in particular in order to guarantee a good aesthetic appearance of the device 1.

[0107] Alternatively, 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 couples. galvanic 240, without using any other material.

[0108] 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 22 and the counter-electrode 23 which is 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 galvanic couples 240 will generate a voltage of 3.12 V, and a current generator 24 comprising three galvanic couples 240 will generate a voltage of 4.68 V. Empirically, it has been measured that a current generator 24 comprising a zinc-silver galvanic couple 240 generates a voltage of 1.1 V.Thus, empirically, a current generator 24 comprising two galvanic couples 240 generates a voltage of 2.2 V and a current generator 24 comprising three galvanic couples 240 generates a voltage of 3.3 V. In one embodiment, the current generator 240 comprises five galvanic couples 240 and generates, empirically, a voltage of 5.5 V.

[0109] 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 100, which will consume the current, remaining identical, by increasing the voltage, thanks to the series connection of a plurality of galvanic couples 240, the current which circulates in the skin 100 is necessarily increased when the device 1 is activated and placed on the skin 100. The skin 100 behaves on average like a resistance of 10 kΩ (10,000 Ω). Thus, theoretically, a current generator 24 comprising a single galvanic couple 240 generates a current of 110 pA. Similarly, a current generator 24 comprising five galvanic couples 240 generates a current of 550 pA.

[0110] However, due to current losses, for example at the contact between the skin 100 and the electrodes 22, 23, the actual current measured is lower than the theoretical current. Thus, for example, the current generator 24 comprising a galvanic couple 240 generates a current with an intensity of up to 100 pA. The current generator 24 comprising two galvanic couples 240 generates a current with an intensity of up to 150 pA. Other current generators 24, such as those used for the benefit of a drop-shaped device 1, generate a current with an intensity of up to 300 pA, and still others generate a current with an intensity of up to 180 pA.

[0111] The performance of the current generator 24 is thus improved. Thus, more current flows through the user's skin 100, which increases the ion-treatment tophoresis 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 into the user's skin 100.

[0112] Advantageously, the current generator 24 comprises at least three galvanic couples 240. Preferably, the current generator 24 comprises at least four galvanic couples 240.

[0113] In one embodiment, the current generator 24 comprises at least two current generation assemblies each comprising a plurality of galvanic couples 240 connected in series and the two current generation assemblies are connected in parallel.

[0114] Arranging the current generation assemblies in parallel makes it possible to combine the intensities of the electric currents generated by each current generation assembly. Thus, the intensity of the electric current generated by the current generator 24 is increased. Typically, this makes it possible, for example, to generate a current of up to 200 pA.

[0115] Preferably, the elements printed on the support film 21, i.e. the electrodes 22, 23, the current generator 24 and the connectors 244, 245, 246, have a thickness of between 10 μm and 20 μm. The support film 21 has a thickness of between 20 μm and 90 μm, or 40 μm and 90 μm, the layer forming each of the first support 201 and the second support 202 preferably has a thickness of between 30 μm and 110 μm, or between 50 μm and 110 μm. The device 1 thus offers a remarkable compromise between electrical conductivity, flexibility, and duration of use, in particular for the zinc ink which is consumed during treatment.

[0116] Impregnation layer

[0117] The device 1 further comprises at least two impregnation layers 4, each comprising at least one impregnation film 41, one of the impregnation layers 4 covering at least one of the main electrode 22 and the counter-electrode 23, preferably each of the main electrode 22 and the counter-electrode 23, while another of the impregnation layers 4 covers the current generator 24. In other words, one of the impregnation layers 4 is positioned on at least one of the electrodes 22, 23, or even each of them, being further from the first support 201 than the latter, in a direction orthogonal to the active face 2011 of the first support 201. And, another of the impregnation layers 4 is positioned on at least one of the galvanic couples 240 of the current generator 24, being more far from the second support 202 than the galvanic couple 240 in the direction orthogonal to the active face 2021 of the second support 202.

[0118] In one embodiment, once the supports 201, 202 are assembled together, that of the impregnation layers 4 which covers the current generator 24 is, in reality, positioned opposite the passive face 2012 of the first support 201 and the active face 2021 of the second support 202 so as to cover them completely, while that of the impregnation layers 4 which covers at least one of the main electrode 22 and the counter-electrode 23 is, in reality, positioned opposite the active face 2011 of the first support 201 and the passive face 2022 of the second support 202 so as to cover them completely.

[0119] To operate the device 1, activation product may be impregnated at the activation zones of the impregnation layers 4, the activation zones being electrically isolated from each other to avoid the occurrence of short circuits.

[0120] 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. This can be implemented by the presence of the activation product at the free spaces 243 between the conductive poles 241, 242 of each galvanic couple 240. Thus, it is desired that the activation product be placed at the free spaces 243 and that the activation product remain during a certain operating time of the device 1 at the free spaces 243. That of the impregnation layers 4 which is positioned 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 time necessary for the treatment of the area of ​​the skin 100 to be treated. Activation zones therefore correspond to the zones of that of the impregnation layers 4 covering the second support 202 which are arranged at the level of the free spaces 243, that is to say activation zones correspond to the zones of the impregnation layer 4 of that of the impregnation layers 4 covering the second support 202 which are arranged opposite and / or on and / or above the free spaces 243.

[0121] Preferably, each activation zone extends from the first conductive pole 241 to the second conductive pole 242 of a galvanic couple 240. More preferably, each activation zone is arranged opposite a part of a first conductive pole 241, a part of the free space 243 and a part of a second conductive pole 242 of a galvanic couple 240. In this way, when activation product is applied to the activation zone, 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, that is to say of putting into operation, of the device 1, the activation product will make it possible to put into electrical contact the first and second conductive poles 241, 242 by filling the free space 243, initially insulating.

[0122] In one embodiment, for a galvanic couple 240, an activation zone comprises a zone of that of the impregnation layers 4 covering the current generator 24, which is located opposite, that is to say covering, the whole of the galvanic couple 240, namely its first conductive pole 241, its second conductive pole 242 and its free space 243.

[0123] Preferably, in operation, it is preferable that activation product is also present between each electrode 22, 23 and the skin 100 of the user to facilitate the circulation of the electric current between the device 1 and the skin 100. This also makes it possible to limit the risk of redness of the skin 100 in 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 the treatment of the skin 100, it is necessary to apply activation product between the skin 100 and at least one of the electrodes 22, 23, preferably between the main electrode and the skin 100, to ensure good absorption of the active agent, at the level of at least one of the electrodes 22, 23, preferably of the main electrode 22.Consequently, the presence of that of the impregnation layers 4 which is positioned at the electrodes 22, 23 also makes it possible to act as a reservoir of activation product, more precisely of active agent, for a certain period of time. Thus, another activation zone corresponds to that of the impregnation layers 4 which is arranged at the main electrode 22. Another activation zone corresponds to the zone of that of the impregnation layers 4 which is arranged at the counter-electrode 23. In other words, other activation zones correspond respectively to the zones of that of the impregnation layers 4 positioned opposite the active face 2011 of the first support 201, which are arranged opposite and / or on and / or above the main electrode 22 and the counter-electrode 23.

[0124] Thus, the impregnation film 41 of each of the impregnation layers 4 has, in particular, the role of being impregnated with an activation product advantageously comprising an active agent intended to be diffused into the skin 100 by iontophoresis and / or electrostimulation and / or electroporation. The impregnation film 41 is therefore manufactured from at least one porous material, that is to say a material which absorbs the activation product.

[0125] 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 100 of a user without risk of skin reaction.

[0126] Furthermore, a non-woven textile has the advantage of being very flexible and therefore does not limit the flexibility of the device 1.

[0127] The impregnation film 41, and consequently each of the impregnation layers 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 2.0 mm. The thickness of the impregnation film 41, and consequently each of the impregnation layers 4, is notably chosen as a function of the desired absorption capacity of the impregnation layers 4.

[0128] 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 is the case for example with a physiological serum or a saline solution, the impregnation film 41 is 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 is the case for example with a cosmetic cream or a gel, the impregnation film 41 is manufactured from a low-absorbent material to allow the impregnation film 41 to become sufficiently impregnated.

[0129] At least one, if not each, of the impregnation layers 4 may comprise a single impregnation film 41 which covers, respectively, the assembly comprising the main electrode 22, the passive face 2022 of the second support 202 and the counter-electrode 23, and the assembly comprising the current generator 24 and the passive face 2012 of the first support 201. In this case, the impregnation layers 4 are said to be monolithic. 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, for example in the form of a cosmetic cream.Indeed, in this case, when the activation product is applied to the activation zone of each of the impregnation layers 4, that is to say to this entire zone or to a part of this zone, the activation product remains substantially on this activation zone 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.

[0130] When the impregnation layers 4 are monolithic, they may comprise at least one capillary action limiting device, such as 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, by capillarity, within the impregnation layer 4. 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 process of the device 1. Advantageously, the impregnation layer 4 positioned opposite the active face 2021 of the second support 202 comprises two capillarity limitation devices, arranged on either side of the current generator 24.

[0131] According to another embodiment, at least one, if not each, of the impregnation layers 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 which are distinct and separated from each other. In one embodiment, the impregnation layer 4 positioned opposite the active face 2011 of the first support 201 comprises three impregnation films 41 including a first impregnation film 41 intended to cover the main electrode 22, a second impregnation film 41 intended to cover the counter-electrode 23 and a third impregnation film 41 intended to cover the passive face 2022 of the second support 202. Advantageously, the first, second and third impregnation films 41 are not in contact with each other.This embodiment is for example suitable in the case where the activation product has a low viscosity, that is to say it is liquid, or fluid, for example in the form of serum or solution. Indeed, in this case, when the activation product is applied to an activation zone of the impregnation layer 4, that is to say to this entire zone or to a part of this zone, the activation product tends to spread. The fact that the impregnation films 41 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.

[0132] In the case where one of the impregnation layers 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, three separate but identical films, i.e. in the same material, can be used.

[0133] Different activation products can be used depending on the different activation zones. Therefore, the impregnation films 41 can each be made of materials adapted to the viscosity of the activation product that they are intended to receive.

[0134] Preferably, at least one impregnation film 41 is not pre-impregnated. The pre-impregnation may allow the use of the device 1 by a user without any prior step except applying the device 1 to the skin 100.

[0135] However, prepreg may reduce the operating life of the device 1 for treating the user's skin 100. Indeed, for example, this can lead to premature activation of the current generator 24 if the corresponding activation zone 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 already have been operating for a certain period of time before the user applies the device 1 to his skin 100.

[0136] It is therefore preferred that the impregnation film(s) 41 are not pre-impregnated. Consequently, it is preferred that the user impregnates the activation zones as little time as possible before applying the device 1 to his skin 100. Indeed, it is particularly advantageous that the first or second conductive pole 241, 242 comprising the reducing agent, for example zinc, is not pre-impregnated so as not to trigger the redox reaction before the actual use of the device 1.

[0137] At least one, if not each, of the impregnation layers 4 advantageously has a shape corresponding to the shape of the device 1, typically drop, disc or triangle shapes. The shape of each impregnation film corresponds to the shape of the area that it is intended to impregnate.

[0138] Means of contact

[0139] Advantageously, the device 1 comprises contact and holding means to ensure contact between the device 1 and the skin 100 of the user and to hold the device 1 on the skin 100 despite possible external disturbances, such as wind, clothing, hair, etc.

[0140] The contact means typically comprise an elastic band. For example, in the case of a device 1 in the form of a face mask, the device 1 may comprise an elastic band that surrounds the head to press the device 1 against the face.

[0141] Preferably, the contact means comprise an adhesive element. The adhesive element projects from the active face 2011 of the first support 201 and / or from the passive face 2022 of the second support 202. It may also be two separate adhesive elements, one projecting from the active face 2011 of the first support 201 and the other from the passive face 2022 of the second support 202. Alternatively, the adhesive element may be common to both supports 201, 202, i.e. monolithic and, in this case, only be attached to the device 1 once the supports 201, 202 have been assembled together, for example by participating in the fixed assembly of the supports 201, 202.

[0142] The adhesive element is typically in the form of an adhesive layer which comprises at least one adhesive film. The adhesive film can thus cover the entire active face 2011 of the first support 201 and the passive face 2022 of the second support 202, once the supports 201, 202 are assembled together.

[0143] Preferably, the adhesive layer covers the impregnation layer 4 located on the electrodes 22, 23. 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 passage 203 of current between the electrodes 22 and 23 and the skin 100.

[0144] Thus, the adhesive layer ensures that the device 1 is held on the skin 100.

[0145] The adhesive layer has an external adhesive surface intended to come into contact with the skin 100 of the user and to ensure the attachment of the device 1 to the skin 100 for the entire duration of the treatment.

[0146] The adhesive layer advantageously also has an internal adhesive surface intended to come into contact with the impregnation layer 4 covering the active face 2011 of the first support 201 and the passive face 2022 of the second support 202, and thus to 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 100 and an internal adhesive surface intended to be in contact with the impregnation layer 4.

[0147] 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.

[0148] Consequently, the total thickness of the device 1, i.e. of the stack of its layers, is less than 4.5 mm, preferably less than 3.0, and more preferably less than 1.0 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.

[0149] Manufacture and use of the device

[0150] The use of the device 1 involves providing it and also obtaining the substance containing the active agent and / or the electrically conductive activation product, the activation product being able to be integrated into the substance containing the active agent. The substance can be cosmetic and / or therapeutic.

[0151] The use of the device 1 may also require the manufacture E of the device 1, in particular when it is presented to the user in the form of a kit.

[0152] A fabrication E of the device 1 comprises the assembly E1 of the supports 201, 202 so as to electrically connect E2 the current generator 4 to each of the electrodes 22, 23.

[0153] In one embodiment, the active face 2021 of the second support 202 is positioned opposite the active face 2011 of the first support 201 so that the current generator 24 is located opposite the passage 203 provided through the first support 201. Then the supports 201, 202 are assembled together, the current generator being inserted into the passage 203 until the electrical contactors 2440, 2450 of the second support 202 come into abutment with the electrical contactors 2441, 2451 of the first support 201 so as to electrically connect E2 the current generator 24 to the electrodes 22, 23.

[0154] This fabrication E is simple and practical to implement, and can therefore be implemented by any user, including non-professionals in the field of treatment by iontophoresis and / or electrostimulation and / or electroporation.

[0155] The use of the device 1 also implies that the substance containing the active agent is applied directly to the skin 100 of the user, or to the device 1. Where appropriate, the substance containing the active agent is preferably applied to the main electrode 22.

[0156] Furthermore, the use of the device 1 requires its activation. To do this, whether or not it is integrated into the substance containing the active agent, the activation product is, concomitantly or successively with the application of the substance containing the active agent, applied to the device 1, and this at the level of at least one of the galvanic couples 240 of the current generator 24, so as to cause an oxidation-reduction reaction between the conductive poles 241, 242 of the galvanic couple 240 and thus to activate it so that it is capable of generating electric current flowing between the conductive poles 241, 242, via the activation product. This activation of the device 1 is therefore advantageously implemented at the level of the face of the device 1 which is not intended to come into contact with the skin 100, so as to limit, or even eliminate, any risk of short circuit.

[0157] The activation of the device 1 can be implemented before or after its manufacture E.

[0158] The activation product is also advantageously applied to the device 1, at the electrodes 22, 23.

[0159] Advantageously, the manufacturing E may comprise the positioning and fixing of an impregnation film 41 on each of the faces of the device 1, so as to cover them completely, by covering on one side the active face 2011 of the first support 201 and the passive face 2022 of the second support 202 and, on the other side, the passive face 2012 of the first support 201 and the active face 2021 of the second support 202. In this case, activation product may be poured onto the impregnation film 41 covering the current generator 4 while substance containing the active agent may be poured onto the impregnation film covering the electrodes 22, 23.

[0160] The device 1 is, finally, applied to the skin 100 of a user so that the electrodes 22, 23 are arranged opposite the skin 100 of the user, and more particularly that the main electrode 22 is arranged opposite the area to be treated, in direct or indirect contact with the skin 100 of the user. Where appropriate, indirect contact is implemented taking into account the arrangement of the impregnation film 41 between the electrodes 22, 23 and the skin 100 of the user. Preferably, the materials in contact with the user's skin 100 comprise only non-woven textile, the impregnation film 41, the activation product and possibly an adhesive material of the adhesive layer. As a result, the user's skin 100 is only in contact with skin-friendly materials 100, which reduces the risk of allergic reaction, improves the comfort of use of the device 1 and considerably limits, or even eliminates, any risk of redness appearing on the area of ​​the skin 100 which is treated with the device 1.

[0161] Once contact has been established between the device 1 and the skin 100, electric current generated by the current generator 24 can flow through the skin 100, via the main electrode 22 and the counter-electrode 23. The removable nature of the attachment of the supports 201, 202 to each other is advantageous when using the device 1. Indeed, it allows the user to reuse at least one of the two supports 201, 202. Typically, the first support 201 may have to be discarded due to the soiling caused by the application of the substance containing the active agent at the main electrode 22. Similarly, the second support 202 may have to be replaced due to the exhaustion of one of the galvanic couples 240 of the current generator 24.

Claims

Claims

1. Device (1) for cosmetic treatment of the skin (100) of a user by iontophoresis and / or electrostimulation, the device (1) being intended to be applied to the skin (100) of the user and comprising: a first support (201) having an active face (2011) intended to face the skin (100) of the user during the cosmetic treatment, and a passive face (2012) opposite the active face; a main electrode (22) extending projecting from the active face (2011) of the first support (201) and intended to be associated with a cosmetic substance during the cosmetic treatment; a counter-electrode (23) extending projecting from the active face (2011) of the first support (201); a second support (202) distinct from the first support (201) and having a passive face (2022) intended to face the skin (100) during the cosmetic treatment, and an active face (2021) opposite the passive face (2022);and a current generator (24) comprising at least one galvanic couple (240) extending projecting from the active face (2021) of the second support (202), the galvanic couple (240) consisting of an anode (242) and a cathode (241); wherein the first support (201) and the second support (202) are configured to be assembled to each other, so that the current generator (24) is electrically connected to the main electrode (22) and to the counter electrode (23).;

2. Device (1) according to claim 1, wherein a passage (203) is provided through the first support (201) and extends from the active face (2011) to the passive face (2012) of the first support (201), the first support (201) and the second support (202) being configured to be assembled to each other by inserting at least a portion of the second support (202) within the passage (203).

3. Device (1) according to claim 2, wherein the passage (203) is an orifice passing through the first support (201).

4. Device (1) according to claim 2, wherein the passage (203) is a recess open on one side of the first support (201).

5. Device (1) according to any one of claims 2 to 4, wherein the first support (201) and the second support (202) are configured to be fixedly assembled.

6. Device (1) according to any one of claims 2 to 4, wherein the first support (201) and the second support (202) are configured to be removably assembled.

7. Device (1) according to any one of claims 1 to 6, further comprising a first electrical contactor (2440) and a second electrical contactor (2450), the first electrical contactor (2440) being intended to be electrically connected to the main electrode (22) and the second electrical contactor (2450) being intended to be electrically connected to the counter electrode (23), when the first support (201) and the second support (202) are assembled to each other, each of the first electrical contactor (2440) and the second electrical contactor (2450) extending projecting from the active face (2021) of the second support (202) and being electrically connected to the current generator (24).

8. Device (1) according to claim 7, wherein the first electrical contactor (2440) is intended to be in contact with a portion (2441) of the main electrode (22) and to extend opposite the active face (2011) of the first support (201), and the second electrical contactor (2450) is intended to be in contact with a portion (2451) of the counter-electrode (23) and to extend opposite the active face (2011) of the first support (201), when the first support (201) and the second support (202) are assembled to each other.

9. Device (1) according to any one of claims 1 to 8, wherein the current generator (24) comprises a plurality of galvanic couples (240) electrically connected in series, each of the plurality of galvanic couples (240) extending projecting from the active face (2021) of the second support (202) and consisting of an anode (242) and a cathode (241).

10. Device (1) according to any one of claims 1 to 9, further comprising a non-woven fabric film (41) positioned on at least one of the main electrode (22) and the counter electrode (23) being further from the first support (201) than the at least one of the main electrode (22) and the counter electrode (23) in a direction orthogonal to the active face (2011) of the first support (201).

11. Device (1) according to any one of claims 1 to 10, further comprising a film (41) of non-woven fabric positioned on the at least one galvanic couple (240) being further from the second support (202) than the galvanic couple (240) in the or- thogonal to the active face (2021) of the second support (202).

12. Device (1) according to any one of claims 1 to 11, further comprising an adhesive element extending projecting from the active face (2011) of the first support (201) and configured to fix the first support (201) to the skin (100) of the user during the cosmetic treatment.

13. Device (1) according to any one of claims 1 to 12, further comprising an adhesive element extending projecting from the passive face (2022) of the second support (202) and configured to fix the second support (202) to the skin (100) of the user during the cosmetic treatment.

14. A device (1) according to any one of claims 1 to 13, wherein one of the anode (242) and the cathode (241) comprises silver and the other of the anode (242) and the cathode (241) comprises zinc.

15. Method (E) of manufacturing a device (1) according to any one of claims 1 to 14, the method comprising the assembly (El) of the first support (201) to the second support (202) so as to electrically connect (E2) the current generator (24) to the main electrode (22) and to the counter-electrode (23).

Images