Device for processing human keratinous materials including closed-loop cleaning

Abstract

Human keratin treatment device including closed-loop cleaning Human keratin treatment device (1) comprising a handpiece (2) having: - a treatment head (5) to be placed in contact with the keratin materials, defining at least one treatment zone, - at least one reservoir (7) for containing a fluid used during the treatment, - at least one fluid circulation circuit (6) having at least one channel (6a; 61) for supplying the fluid to the treatment zone and at least one channel (6b; 62) for returning the fluid from the treatment zone, the device having: - a sealing part (31) to be placed in contact with the head when not in use of the device and having a surface arranged to close the treatment zone in order to allow recirculation of the fluid in the circuit when the treatment head is not in contact with the keratin materials.Figure for the abridged version: Fig. 1.

Description

Title of the invention: Device for treating human keratin materials including closed-loop cleaning Technical field

[0001] The present invention relates to devices for treating human keratin materials, and is more particularly interested in those having a cleaning and / or decontamination function. Prior art

[0002] The wavelength of category C ultraviolet radiation (UV-C) ranges from 100 nm to 280 nm. The effectiveness of UV-C is recognized in destroying or inactivating microorganisms, by altering nucleic acids. This property is used for disinfection in a large number of applications.

[0003] Patent FR2918854 describes a method for decontaminating an applicator and / or a cosmetic product contained in a container by exposure to UV-C radiation.

[0004] Application WO2018046849 describes a decontamination device comprising a body housing a UV source, the body being intended to removably receive a part of a device for packaging and dispensing a cosmetic product.

[0005] Patent US7560706 describes a germicidal device comprising a UV source for irradiating cosmetic compositions and cosmetic utensils to be sterilized.

[0006] Patent US9006680 describes an ultraviolet impermeable cap enclosing a volume of fluid and comprising a source of UV radiation irradiating inside the volume of fluid.

[0007] US patents 11214499 and US 10988389 describe caps for disinfecting water, in particular drinking water, for covering a bottle, the cap comprising a source of UV radiation.

[0008] Application US6086760 discloses an ultraviolet sterilizer assembly for use in aquariums, the sterilizer assembly having a vertically oriented tubular housing, which forms a sterilization chamber.

[0009] Application US5664340 describes a clothes dryer comprising, inside the door, an antibacterial and antifungal UV lamp.

[0010] Patent US8414839 describes a system comprising a UV source for generating ozone in the water circulation pipes of spas, swimming pools, fountains, etc.

[0011] The applicant has developed devices for treating human keratin materials. These devices have the particularity of using at least one reservoir containing a fluid subjected to the action of ultrasonic waves and a circulation circuit for this fluid, between the reservoir and a treatment zone and vice versa, as well as between different internal parts of the devices.

[0012] There is a need to be able to clean and disinfect such devices effectively and simply, particularly their internal parts.

[0013] Furthermore, there is a need to carry out this cleaning and disinfection without risk and without impact on the environment. Summary of the invention

[0014] The invention aims to meet all or part of these needs and has as its subject, according to a first of its aspects, a device for treating human keratin materials, in particular skin and / or hair, comprising: - a treatment head to be placed in contact with the keratin materials to be treated, defining at least one treatment zone, - at least one reservoir for containing a fluid, in particular a cosmetic composition, used during the treatment, this reservoir having an internal surface in contact with the fluid, - preferably, at least one ultrasonic transducer for emitting acoustic waves at least into the fluid present in the treatment area, - at least one source of UV radiation, - at least one fluid circulation circuit connecting the reservoir and the treatment zone, at least part of the internal surface of the reservoir and / or the fluid circulation circuit being exposed to the UV radiation emitted by the source.

[0015] The invention also relates, according to a second of its aspects, independently or in combination with the first, to a device for treating human keratin materials, in particular skin and / or hair, comprising a handpiece comprising: - a treatment head to be placed in contact with the keratin materials to be treated, defining at least one treatment zone, - at least one reservoir for containing a fluid, in particular a cosmetic composition, used during the treatment, - at least one circulation circuit for the fluid used during the treatment, comprising at least one channel for supplying the fluid to the treatment zone from the reservoir and at least one channel for returning the fluid from the treatment zone, - preferably, at least one ultrasonic transducer for emitting acoustic waves at least into the fluid present in the treatment area, the device further comprising: - a sealing part, intended to be placed in contact with the treatment head in the absence of use of the device for treating human keratin materials, this closure part having a surface arranged to close the treatment area so as to allow the recirculation of the fluid in the fluid circulation circuit in the absence of contact of the treatment head with the human keratin materials.

[0016] The treatment of keratin materials using the device according to the invention may in particular be a cleaning of the skin or hair, a peeling of the skin, the diffusion of active ingredients on the keratin materials, and / or a treatment of certain skin disorders.

[0017] The fact that at least part of the internal surface of the reservoir and / or of the circulation circuit is exposed to the UV radiation emitted by the source according to the first aspect of the invention makes it possible to effectively combat the risk of proliferation of microorganisms within the fluid used for the treatment, by having a disinfecting or decontaminating action.

[0018] The use of UV radiation for cleaning and disinfection is environmentally friendly, and allows for the avoidance of chemical treatment or the limitation of the quantity used.

[0019] Furthermore, UV radiation does not cause any changes, detrimental to the use of the device, in odor, pH, conductivity or the chemical properties of the environment in which it is used.

[0020] The terms "disinfection" and "decontamination" are synonymous and mean that microorganisms are destroyed by UV radiation. The decontamination of surfaces or volumes exposed to UV radiation may not be complete, the rate of destruction of microorganisms preferably being greater than or equal to 90%, better still greater than or equal to 99.999%. Reservoir

[0021] The device comprises at least one reservoir for containing said fluid.

[0022] By "reservoir" we mean any element allowing the fluid to be contained; thus the reservoir can be formed by any type of cavity, by a pocket or a cartridge, that is to say a removable element in the latter case.

[0023] The UV radiation source may be arranged to emit its UV radiation inside said reservoir.

[0024] The device may comprise at least one source of UV radiation, in particular located inside the tank.

[0025] The tank may still be exposed to UV radiation emitted by a source external to the tank. In this case, the source may be arranged to emit its radiation at least partially towards the opening of the tank, so that it can reach the fluid contained in the tank and / or a surface of the reservoir in contact with the fluid.

[0026] The material of the tank can also be chosen to be sufficiently transparent to UV radiation to allow UV action through its wall, or alternatively the tank is made with a window transparent to the UV radiation emitted by the source.

[0027] The device may comprise several separate reservoirs, for example a reservoir of fluid to be distributed over the area to be treated and a reservoir for receiving the used fluid which has been at least partially recovered following the treatment. Alternatively, the fluid coming from the reservoir is not recycled by the device or is returned to the same reservoir from which it came, for example at one end of the latter opposite that from which the sample is taken.

[0028] The reservoir(s) may or may not be removable. The reservoir(s) are, for example, disposable and may be replaced when there is no more fluid, or when the recovered fluid must be evacuated.

[0029] It is also possible to provide reservoirs of varying capacities depending on the treatment to be carried out on the keratin materials, the device being able to be configured to allow the user to put in place the reservoir of his choice, chosen from several with different respective capacities.

[0030] The reservoir can maintain the same position in the device when exposed to UV radiation and when using the device to treat human keratin materials.

[0031] Alternatively, the reservoir is separated from the fluid circuit during the cleaning and / or decontamination phase, for example by being installed on a handpiece support, as will be described later. In this case, the support may comprise at least one source of UV radiation to decontaminate at least part of the reservoir.

[0032] When the device comprises a pump for circulating the fluid to the treatment zone, the device advantageously comprises, so as to facilitate the cleaning and / or decontamination of the reservoir, a selector which makes it possible to change the circulation of the fluid from a first configuration where the circulation takes place between the reservoir(s) and the treatment zone, and a second configuration used for purging and / or filling the reservoir(s). The interior of the pump may be exposed to the radiation of the UV radiation source(s) of the device and / or to the fluid previously decontaminated by the UV radiation and circulating inside it.

[0033] The reservoir(s) may comprise one or more compartments, in particular several compartments integrated in the same body and separated by a wall, or several communicating compartments, for example connected by a channel. The reservoir(s) may comprise a compartment containing the fluid to be distributed on the area to be treated, and a compartment collecting the used fluid, for example for recycling. The two compartments can communicate, for example through a filter.

[0034] The reservoir(s) may also comprise several compartments in which different compositions may be stored. These compositions may be mixed at the time of use and some may be solid and / or in the form of rapidly soluble powders.

[0035] For example, a reservoir may comprise a first compartment containing a solid composition, for example in the form of powder or crystals, and a second compartment comprising a fluid composition, the two compartments being able to communicate during use so that the fluid composition solubilizes the solid composition.

[0036] The first compartment may also comprise a mixture of a suspended solid composition and a liquid in which the solid composition is insoluble, the fluid composition of the second compartment solubilizing the mixture during use of the device.

[0037] The reservoir(s) may include one or more filters to filter impurities from the collected fluid before redistributing it to the area to be treated. The reservoir may also include a vent.

[0038] The reservoir(s) may comprise a device for heating or cooling the fluid, in particular an electrical resistor.

[0039] The reservoir(s) are preferably compatible with one or more liquids of various natures, in particular different types of compositions, miscible or not, and cleaning liquids.

[0040] The reservoir(s) are preferably at least partially transparent, which allows the user to visually see their filling level and / or the level of cleanliness of the fluids they contain.

[0041] The reservoir(s) may be deformable, or made of rigid material, in particular glass or plastic. A reservoir may include a removable part, and thus be of adjustable volume depending on what is desired. The reservoir(s) may be provided with valves allowing them to be disconnected from a housing receiving them without loss of fluid.

[0042] The reservoir(s) may be in the form of cartridges, generally cylindrical or otherwise shaped, or flexible pouches.

[0043] At least one reservoir has a capacity for example between 1 ml and 200 ml, better between 1 and 50 ml.

[0044] The reservoir(s) may comprise one or more fluid non-return devices, for example at least one valve which opens automatically when the reservoir is placed in a corresponding housing on the handpiece or its support, and which closes automatically when the reservoir has been separated from the handpiece or support, to prevent liquid loss. Fluid circulation circuit

[0045] The fluid circulation circuit allows for a saving of water and / or fluid, in particular a saving of the cosmetic composition.

[0046] The fluid circulation circuit typically comprises a plurality of conduits, which are connected in a suitable manner to achieve the desired fluid circulation, for example with end-to-end or parallel connections, being connected together by suitable connections.

[0047] The fluid circulation circuit may comprise at least one electric pump for circulating the fluid in the fluid circulation circuit, in particular between the reservoir(s) and the treatment zone.

[0048] The fluid circulation circuit connects together the different parts of the device concerned with the circulation of the fluid, such as the treatment head, the pump(s) and the fluid reservoir(s), as well as the filter(s) or other purification or disinfection systems, or even additional bubble generation.

[0049] The fluid circulation circuit may include one or more modifiable bypasses or valves, for example one or more manual or electrically controlled valves.

[0050] The fluid circulation circuit may include a water intake allowing it to be charged with water and / or cleaned from an external network.

[0051] The fluid circulation circuit can also be modular with removable sections, for example sections that are added when cleaning the circuit. For example, a section can be added comprising a cleaning powder that dissolves at least in part when a liquid passes through the circuit. The section that is thus added can be used only for cleaning, and removed afterward, or left in place until the next cleaning, then being replaced by a new one.

[0052] The fluid circulation circuit may comprise at least one inlet and / or at least one outlet enabling connection to one or more secondary fluid circulation circuits. The fluid circulation circuit may also be connected to one or more secondary reservoirs, comprising in particular compositions that are different from one another, this enabling, for example, the circulation of compositions in all forms as described above.

[0053] The reservoir(s) and the fluid circulation circuit allowing the circulation of the fluid may belong to the same assembly forming a refill, capable of being handled as a single unit for its placement on the device and removal from the latter; refilling with product is then made easier. Such a refill may, if necessary, have a mechanical interface with the pump or other mechanism drive, allowing when activated to establish a circulation of product from the refill to the treatment area.

[0054] The refill assembly may be arranged to be fixed, for example by snap-fastening or otherwise, in the device, for example in the same housing as that containing another component of the device, for example an electric generator.

[0055] The fluid circulation circuit may comprise at least one source of UV radiation, in particular located inside the circuit, or outside but arranged so that the radiation reaches an internal surface of the circulation circuit in contact with the fluid.

[0056] Thus, at least one conduit can be made of a material transparent to UV radiation, in particular to UVC radiation, the conduit being for example located close to the source. Treatment head

[0057] The treatment head is preferably arranged to distribute the fluid over the area to be treated via at least one fluid outlet, and / or to recover at least partially the fluid used from the area to be treated via at least one fluid return inlet.

[0058] The outlet and / or the inlet are for example connected to the aforementioned fluid circulation circuit. In particular, the fluid circulation circuit may be arranged relative to the treatment head so as to distribute and / or partially recover the fluid in front of and / or behind the emission surface of the sonotrode of the transducer, for example through at least one orifice on the emission surface.

[0059] Preferably, the transducer extends at least partially into the treatment head. In particular, it may be housed entirely there.

[0060] The treatment head may comprise a heating element such as an electrical resistor, for heating the composition for example, and / or a light source arranged to illuminate the treatment area during use and / or activate certain constituents of the fluid in which the cavitation occurs.

[0061] The treatment head may comprise at least one filter, which is used for example to filter the composition which is recycled, this filter being for example arranged on the return path of the fluid.

[0062] The treatment head may comprise a porous material and / or one capable of releasing or diffusing a fluid, in particular an open-cell foam, preferably carried by a removable support, in particular in the form of a frame.

[0063] The treatment head may comprise distribution orifices, such as slots, closed at rest, opening under the pressure of the upstream composition, and having an elasticity allowing an increase in volume during filling and a distribution of the fluid continuing after the end of the filling action.

[0064] The treatment head may comprise a chamber for storing a quantity of fluid sufficient to allow the cleaning of keratinous materials and the contact of the bubbles with the surface to be cleaned.

[0065] The treatment head may comprise several compartments, independent or communicating with each other.

[0066] The treatment head may comprise parts made of flexible and / or deformable material, in particular elastically deformable, in particular for the parts in contact with the keratin materials to be treated.

[0067] The treatment head can be of various shapes, depending on the intended use for the device.

[0068] The treatment head may comprise one or more removable parts, easily detachable by the user of the device, preferably without using a tool.

[0069] This makes it easier to clean between uses.

[0070] The removable part(s) of the treatment head may be attached to the rest of the device via any suitable attachment means, in particular a ball joint, spring, or a piston. The treatment head is preferably mobile; in examples it may tilt or be rotated through more than 180°, 270° or 360° around at least one axis.

[0071] The transducer is preferably arranged relative to the treatment head so as to keep the acoustic wave emission surface of the sonotrode away from the surface of the keratin materials to be treated.

[0072] Where appropriate, the transducer is movable relative to a fixed part of the device, for example driven by a rotational or back-and-forth movement.

[0073] Cavitation thus occurs in the front part of the head, in a space provided between the emission surface of the sonotrode and the surface of the keratin materials to be treated.

[0074] Thus, the fluid can be made to circulate in this space, which is possibly adjustable.

[0075] This circulation can be carried out continuously or intermittently. It is also possible to fill said space with the fluid while the handpiece is in place, then generate the acoustic waves within the fluid filling this space.

[0076] The treatment head may comprise a tip, preferably removable, in contact with the keratin materials to be treated.

[0077] The tip, when removable, is for example chosen according to the use, for example by selecting the type, size, hardness and / or shape best suited to the morphology of the area to be cleaned.

[0078] The treatment head may comprise a source of UV radiation, in particular UVC, which is only activated in a cleaning or decontamination phase of the device, and not during the use of the latter to treat keratin materials. This source of UV radiation may be located inside or outside the head. of treatment.

[0079] The treatment head may be separable from the rest of the device. Shutter part

[0080] The device preferably comprises a sealing part intended to be placed in contact with the treatment head when the device is not being used to treat human keratin materials.

[0081] The closure portion preferably has a surface arranged to close the treatment area so as to allow recirculation of the fluid in the fluid circulation circuit in the absence of contact of the treatment head with the human keratin materials. Thus, it becomes possible to circulate the fluid during the cleaning phase, during which the UV radiation source is activated. It is thus possible to expose a greater quantity of fluid to the UV radiation, and to benefit from the mechanical cleaning action exerted by the circulation of the fluid.

[0082] This may also allow the ultrasonic generator to be operated during the cleaning action, in order to improve it.

[0083] At least one of the closure portion and the treatment head may carry a seal or a sealing lip, so as to prevent the loss of liquid through the treatment area.

[0084] In particular, the device may comprise a flexible lip which serves to define a seal around the treatment head when using the device to treat keratin materials, as detailed below, and this flexible lip may serve to obtain the seal against the sealing part.

[0085] The sealing portion may be in the form of a removable closing hood or part of a support cradle, as described below. Handpiece

[0086] The device may comprise a handpiece, that is to say a part whose size allows it to be manipulated with one hand by the user. The handpiece may comprise a surface forming a handle.

[0087] The handpiece may comprise the treatment head, the reservoir(s), the ultrasonic transducer(s) and / or the fluid circulation circuit.

[0088] The handpiece may comprise a guide and / or combing member, a tip, a grid, one or more spacers, and / or a flexible lip.

[0089] The handpiece may comprise at least one electric pump for circulating the fluid in the fluid circulation circuit between the reservoir(s) and the keratin materials to be treated.

[0090] The handpiece can be manipulated in all directions, it can be manipulated with the head down or with the head up for example.

[0091] At least one source of UV radiation may be located inside the handpiece, so as to expose to UV radiation at least one internal surface of the reservoir or a portion of the fluid circulation circuit, and / or a surface of the treatment head in contact with the fluid.

[0092] The reservoir(s) and / or the treatment head may or may not be separable from the handpiece.

[0093] Preferably, the handpiece comprises a handle, which may be arranged non-coaxial with the treatment head. The handle may at least partially contain the fluid circulation circuit.

[0094] The reservoir(s) may be arranged in the handpiece, in particular in its handle, or at least partially outside the handpiece. This may facilitate their disassembly, in particular to position them on a support cradle for the handpiece, when the latter is not in use.

[0095] The handpiece is preferably powered by an electric battery, but can also be connected to a power cord. The battery can be recharged directly by a power cord or by a support on which the handpiece is placed. Reflection / transmission of UV radiation

[0096] The device, in particular the handpiece, may comprise a material reflecting more than 50% of UV radiation, in particular UVC.

[0097] The reflective material is advantageously a metal, preferably aluminum or an aluminum alloy, the invention not being limited to such a material.

[0098] Aluminum can be polished and reflect between 80% and 90% of UV radiation.

[0099] At least part of an internal or external surface of the device may be covered with a material reflecting UV rays, in particular UVC rays, in particular a metal deposit, better still an aluminum deposit, to allow the propagation of UV radiation towards the surface(s) to be decontaminated.

[0100] At least part of the internal and / or external surface of the tank may be covered with a material reflecting UV rays, in particular UVC rays, in particular a metallic deposit, better still an aluminum deposit, in particular to improve the action of UV radiation in the tank.

[0101] At least a portion of a conduit of the fluid circulation circuit may be covered with a reflective material, in particular a metal deposit, better still an aluminum deposit, to promote the propagation of UV radiation within the fluid circulation circuit and / or towards the reservoir. The fluid circulation circuit may be covered, on its inner surface and / or on its outer surface, at least in part, better still in its entirety, with a reflective metal.

[0102] The device may comprise at least one material exposed to said UV radiation and transmitting more than 80% of the UVC radiation, in particular a material chosen from the following list: FEP plastic (fluorinated ethylene propylene), quartz, Plexiglass ®, and / or laminated glass with ionoplast interlayer. The device may more generally comprise any material capable of transmitting UV radiation.

[0103] FEP can withstand physical stresses and deformations, such as fining, tensile stress, and wear, while being resistant to stress cracking. Support

[0104] The device may comprise a support arranged to receive the handpiece when the device is not in use for treating keratin materials. This support may be in the form of a cradle on which the handpiece is placed when not in use for treating keratin materials.

[0105] The support can be used to recharge a battery of the handpiece, used to power the electronic circuit ensuring its operation, and / or to store the handpiece, in particular by protecting the treatment head from dirt.

[0106] The holder may be arranged to allow storage of internal and / or external parts of the handpiece, and / or accessories, including a brush, a replacement head, a new reservoir, and / or cartridges of ancillary products.

[0107] The support may partially comprise the fluid circulation circuit. In other words, there may be a fluid connection between the handpiece and the support, allowing the fluid to circulate in the support, in particular with a view to exposing it to UV radiation from a UV source contained in the support.

[0108] The support may be arranged to electrically power the handpiece, in particular the pump(s) included in the handpiece, when the handpiece is received in the support. The handpiece may be charged, in particular by the support, when the treatment head and / or the reservoir are separated therefrom.

[0109] The support may include a transformer or a converter connected to the electrical network.

[0110] The holder and the handpiece may have electrical contacts that come into contact with each other when the handpiece is received on the holder. Alternatively, the energy is transmitted by induction.

[0111] The support may comprise a housing arranged to accommodate the reservoir separate from the handpiece, in particular being arranged to accommodate the reservoir with a reservoir opening facing downwards. This may make it possible to promote drainage of the reservoir and to subject the reservoir opening to UV radiation emitted by a source carried by the support, in front of which the opening is placed.

[0112] The aforementioned closing part can be defined by a part of the support. This means that when the handpiece is replaced on the support, the latter closes the head treatment, and allows fluid circulation in the treatment head without fluid loss. This sealing part can be detachable from the support, allowing the sealing part to remain in contact with the treatment head.

[0113] The support can electrically power the UV radiation source, in particular while the handpiece is present on the support and powered by it. This is very advantageous, because it allows the handpiece to be operated on an external power supply, and not on its internal battery, or to recharge the internal battery at the same time as the handpiece is operating, this operation aiming to clean and decontaminate the handpiece. This provides more electrical power to operate one or more UV sources possibly integrated into the handpiece, a circulation pump integrated into the handpiece, and preferably also the ultrasonic generator. The cavitation of bubbles during cleaning can promote the action of a cleaning and / or decontamination active ingredient, as well as the action of UV.

[0114] The support may comprise at least one UV radiation source, in particular one or two. This is advantageous because it avoids having to integrate the UV source into the handpiece, and thus limits its weight and complexity. In addition, this can make it easier to power it electrically, and to have a stronger UV radiation power.

[0115] The device, in particular the support, may comprise at least one UV radiation source arranged to emit UV radiation inside the reservoir. In this case, it may be advantageous for the reservoir to be removable from the handpiece, to be placed in a housing of the support allowing it to be exposed to UV radiation. The support may comprise a sensor preventing the operation of the UV source in the absence of the reservoir in the dedicated housing of the support, in order to avoid exposing the user to UV radiation. This sensor is for example an optical detector or a mechanical sensor, or a magnetic sensor, the reservoir then being provided with a corresponding activation magnet.

[0116] The support may comprise at least one UV radiation source arranged to emit UV radiation onto the treatment head.

[0117] In this case, the support may include a sensor preventing the operation of the UV source in the absence of the handpiece on the support, in order to avoid exposing the user to UV radiation.

[0118] When the reservoir is separable from the handpiece, it is advantageous for the support to have a housing allowing the reservoir to be stored, in particular with its opening facing downwards as mentioned above, and for the support to also allow the handpiece to be stored thereon, both when the reservoir is in place on the handpiece, and when the reservoir has been detached from the handpiece and installed in the corresponding slot of the support. Soft lip

[0119] The treatment head may comprise at least one flexible lip, which may also act as a spacer to maintain the aforementioned distance between the acoustic wave emission surface of the transducer and the surface to be treated.

[0120] The flexible lip, when the treatment head is applied to the keratin materials to be treated, can participate in the confinement of the fluid in the treatment area.

[0121] The lip may consist of sub-lips between which the fluid can be recovered.

[0122] The flexible lip is preferably made with a material comprising silicone, polyurethane (PU), natural or synthetic rubber, plastic, polyethylene terephthalate (PET) or polythiophene (PT), or a combination of several of these elements.

[0123] The flexible lip may be made with reliefs or from an intrinsically rough material, in order to have a non-smooth contact surface with the keratin materials. The flexible lip may thus contribute to the cleaning of the keratin materials thanks to a mechanical abrasive effect obtained when the device is moved over the area to be cleaned during its use.

[0124] The flexible lip may also assist in delivering, spreading, collecting and / or recycling the fluid.

[0125] The flexible lip may be arranged to create a seal around the treatment area when the aforementioned sealing portion is brought into contact with the treatment head when the device is not being used to treat human keratin materials.

[0126] The flexible lip can allow air to enter the treatment area, particularly if the depression generated by the pump becomes too great. Device

[0127] Preferably, the device is for non-therapeutic purposes, in particular for the topical application of a cosmetic composition.

[0128] The device according to the invention makes it possible to effectively treat both exogenous impurities and endogenous impurities or defects, while meeting certain environmental requirements and safety standards in force.

[0129] At least part of the device can heat and / or diffuse light, and / or cool, this making it possible for example to activate certain compounds present in the fluid, in particular in the cosmetic composition.

[0130] The device, in particular the handpiece and / or the support, can vibrate at least in part, this making it possible in particular to detach certain dirt stuck in the reservoir, and / or the fluid circulation circuit, for example in the pump.

[0131] The device can be associated with additional gripping means, for example additional hands, arranged to allow certain people with disabilities to use it.

[0132] The device may include Braille writing, in particular on certain parts of the handpiece, the support, and / or an external charger of the device. Cleaning and disinfection control

[0133] The device may comprise an electronic circuit controlling the operation of the transducer and possibly other elements of the device such as the electric pump and / or the UV radiation source.

[0134] The electronic circuit preferably comprises a control unit, for example a microcontroller, which can be carried by the handpiece and / or distributed between the support and the handpiece, or present on the support only.

[0135] The device may comprise several sensors, such as a contact sensor of the treatment head on the keratin materials to be treated or on the obturation part, or a sensor of filling or presence of the reservoir, which can communicate data to the control unit. The device may comprise at least one sensor preventing the emission of UV as long as predefined conditions are not satisfied, for example conditions guaranteeing that the UV radiation cannot escape towards the user during the decontamination operation, for example the presence of the handpiece correctly positioned on its support.

[0136] The device may also comprise at least one human-machine interface communicating with the control unit, in particular on the handpiece and / or the support. The human-machine interface may comprise a display screen and / or control buttons.

[0137] The interface may offer various functions and / or programs allowing, for example, certain operating parameters of the device to be adjusted, or certain information to be indicated to the user, such as the battery level, the time of use, the level of liquid in the tank, the level of fouling of the various washable elements (tank, filters, etc.), information specific to the user, or information relating to the safety and / or the conditions of use of the device.

[0138] The interface can make it possible to select an operating mode for treating keratin materials, and a cleaning and decontamination mode in which at least one UV source is switched on.

[0139] The interface can communicate via a wired or wireless connection, for example via Wifi or Bluetooth, with a terminal such as a mobile phone, in order for example to receive updates or send data related to the use of the device.

[0140] The interface may also include functionalities allowing diagnosis of the keratin materials to be treated.

[0141] The device may include various switches, in particular a start and / or standby switch, a switch for selecting a program or certain parameters specific to ultrasonic waves, making it possible to select the flow rate of the pump or a self-cleaning mode of the device.

[0142] The device may also comprise one or more LED type light sources, which may be used to illuminate the area to be treated or act as indicators, for example notifying the user of the need to change, fill or empty the reservoir, or to clean the filtration system, or indicating the active or inactive state of the UV source(s), and / or the operating mode of the device, for example treatment of keratin materials or self-cleaning. Fluid

[0143] The fluid, in particular the cosmetic composition, may comprise at least one surfactant.

[0144] The fluid, in particular the cosmetic composition, may have a total concentration of surfactant(s) of between 0.01% and 20% by weight relative to the total mass of the fluid, in particular the cosmetic composition, better still between 0.01% and 5%, even better still 0.1% and 1.5%.

[0145] The cosmetic composition may or may not have bubbles already present within it before the application of the acoustic waves. Cleaning and disinfection process

[0146] The invention also relates, according to another of its aspects, to a method for cleaning and disinfecting a device for treating keratin materials comprising at least one reservoir for containing a fluid and / or a fluid circulation circuit, and at least one source of UV radiation, in particular a device for treating keratin materials as defined above according to the first aspect of the invention, the method comprising: (1) the emission of UV radiation by said at least one source of UV radiation on at least a portion of an internal surface of said at least one reservoir and / or of the fluid circulation circuit, and optionally in the direction of a treatment head of the device.

[0147] If the device comprises a handpiece comprising the reservoir, and a support on which the handpiece can be placed, the method may comprise, before step (1): (2) positioning the handpiece on the support.

[0148] The method may comprise: (3) separation of the reservoir from the handpiece, (4) the positioning of the tank thus separated on the support, (5) the emission of UV radiation into the tank.

[0149] The method may include separating the treatment head from the handpiece and positioning the separated treatment head on the holder, and then emitting UV radiation onto the treatment head.

[0150] If the device comprises a fluid circulation circuit, the method may comprise the reflection of at least a portion of the UV radiation by surfaces of the fluid circulation circuit, and / or by interior and / or exterior surfaces of the reservoir, and / or by interior surfaces of the handpiece.

[0151] If the handpiece comprises a treatment head defining a treatment zone and a fluid circulation circuit with a channel for supplying fluid to the treatment zone and a channel for returning fluid from the treatment zone, and if the support comprises a sealing part, the method may comprise: (6) positioning the handpiece on the holder so that the sealing portion comes into contact with the handpiece and closes the treatment area, (7) recirculation of the fluid in the fluid circulation circuit.

[0152] During step (7), the recirculation can be carried out by a pump present in the handpiece and electrically powered by the support, for example by means of an electrical connection between the handpiece and the support or by a transmission of electrical energy by induction between the support and the handpiece.

[0153] During step (7), an ultrasonic transducer present in the handpiece can be activated, in order to generate cavitation and reinforce the cleaning action.

[0154] This transducer can be electrically powered by the support.

[0155] During step (7), the fluid may be exposed to UV radiation, as well as surfaces of the treatment area and / or the reservoir.

[0156] The invention also relates, according to another of its aspects, to a method for cleaning and disinfecting a device for treating keratin materials, in particular a device according to the first or second aspect of the invention, as defined above, the method comprising: (1) positioning the handpiece on the holder so that the sealing portion comes into contact with the handpiece and closes the treatment area, (2) recirculation of the fluid in the fluid circulation circuit.

[0157] The holder can power the handpiece when the latter is positioned on the holder.

[0158] The method may comprise: (3) the separation of said at least one reservoir from the handpiece, (4) positioning the tank thus separated on the support.

[0159] During recirculation of the liquid while the sealing portion closes the treatment area, the UV radiation source(s) may be in operation, as well as the ultrasonic transducer. The fluid may be exposed to UV radiation during its recirculation.

[0160] The fluid which circulates during the cleaning phase may be water, a cleaning composition containing at least one cleaning active ingredient, or the cosmetic composition used elsewhere during the treatment of keratin materials.

[0161] The cleaning and disinfection process can take place before and / or after the use of the device for treating keratin materials. Brief description of the drawings

[0162] The invention may be better understood by reading the detailed description which follows, non-limiting examples of its implementation, and by examining the attached drawing, in which:

[0163] [Fig-1] schematically and partially illustrates an example of a device according to the invention,

[0164] [Fig.2] schematically and partially illustrates the handpiece of the device of the [Fig.l],

[0165] [Fig.3A] illustrates schematically and partially the device of [Fig.l] with the reservoir separate from the handpiece,

[0166] [Fig.3B] is a schematic and partial cross-section of the support of the device of [Fig.l] with the reservoir separated from the handpiece,

[0167] [Fig.4] schematically and partially illustrates the device of [Fig.l] under block diagram form,

[0168] [Fig.5] schematically and partially illustrates a first example of a method of cleaning and disinfection of the device of [Fig.l],

[0169] [Fig.6A] schematically and partially illustrates the support of the device of [Fig.l] with UV lamps,

[0170] [Fig.6B] schematically and partially illustrates a second example of a method for cleaning and disinfecting the device of [Fig.l],

[0171] [Fig.7] schematically and partially illustrates an environment for using the device of [Fig.l].

[0172] [Fig.8] is a schematic and partial cross-section of the handpiece of a second example of a device according to the invention, and

[0173] [Fig.9] is a schematic and partial cross-section of the handpiece of a third example of a device according to the invention, Detailed description

[0174] Figures 1 to 7 illustrate a device 1 for treating the skin, according to the invention, comprising a handpiece 2 and a support 3. Handpiece

[0175] The handpiece 2 comprises a handle 4, a treatment head 5, a circuit 6 for the circulation of a composition C and at least one reservoir 7 containing this composition C.

[0176] The reservoir 7 makes it possible, during operation of the device, to compensate for any losses in composition, in the event of non-recycling of part of it.

[0177] The reservoir 7 is preferably separable from the handpiece, as illustrated in Figures 3A and 3B. Alternatively, the reservoir 7 is not separable from the handpiece, as in the variants illustrated in Figures 8 and 9.

[0178] The circuit 6 comprises a pump 11, shown schematically in [Fig. 5]. The pump 11 can be driven by any type, in particular manually or electrically, preferably electrically. It can be of various types. The pump 11 is for example a volumetric or centrifugal pump, in particular peristaltic, diaphragm, piston, or a combination of several types. The pump 11 can be powered by direct or alternating current. Preferably, the supply voltage of the pump 11 is less than 50V, being for example powered by a voltage ranging from 5 to 12V. The pump 11 is preferably compatible with liquids of various types, in particular aqueous, oily, mixed liquids, liquids containing particles or suspended charges, or even polymers. The drive of the mechanism of the pump 11 can be done directly by a motor or in a reduced manner.When the drive is manual, the device 1 may comprise a handle which is actuated by the user to operate the pump 11. Preferably, the pump 11 is configured to provide a fluid flow rate between 0.01 mL and 15 mL per second. The pump 11 may be removable, or not. The pump 11 may generate negative and / or positive pressure on the fluid in order to allow the circulation of the fluid and its contact with the skin. The pump may also be used for internal cleaning of all or part of the device. The pump 11 may contain a filter in one or more parts. The pump 11 may be mechanically or electrically isolated in the device 1, for example to be removed from the device 1 for cleaning.

[0179] The treatment head 5 comprises a surface 10 in contact with the composition C, the treatment head 5 being arranged to deliver the composition C to an area of ​​the keratin materials K to be treated. The composition exits the treatment head 5 through a first opening 101 of a conduit 6a. The handpiece 2 can be moved along the area to be treated and the composition C which is delivered through the opening 101 may not be recycled. Alternatively, recycling of the composition C is carried out, the composition exiting through the opening 101 recirculating in the circuit 6, and optionally the reservoir 7, after being reinjected into the circuit 6 through a second opening 102 of a conduit 6b, present on the treatment head 5.

[0180] The conduit 6b can communicate with a suction pump 30, for example a electric pump, which can send the discharged composition C into a treatment and purification unit 40, which allows the composition C to be recycled with a view to being returned to the keratin materials K to be treated, the composition C then circulating at least partly in a closed circuit. The treatment and purification unit is for example a filtration system comprising one or more filters arranged to stop particles suspended in the composition, such as skin debris removed during cleaning. A filtration system is for example arranged between the suction pump and the reservoir 7, such that the composition C is returned to the reservoir 7 after filtration.

[0181] The handpiece may comprise, where appropriate, around the openings 101 and 102 of the treatment head 5, a sealing element 103, shown schematically in [Fig.5], such as a flexible lip, to contain the composition C when the head is applied to the skin, and facilitate its return through the conduit 6b. The lip may be made up of sub-elements between which the composition can be recovered.

[0182] The treatment head 5 comprises at least one transducer 13 emitting acoustic waves and a sonotrode, the surface 10 in contact with the composition being for example defined by a free end of the sonotrode. Bubbles can be generated in the composition C thanks to the acoustic waves due to the power and frequency of the acoustic waves.

[0183] The transducer 13 or its sonotrode are preferably removable. Thus, they can be easily removed from the device in order to clean them.

[0184] The emission surface 10 of the acoustic waves towards the liquid medium may comprise reliefs or engravings where the bubbles can originate at different levels along the longitudinal axis of the transducer 13. In particular, these reliefs may offer nucleation sites at their top and at their base. The reliefs may allow a more homogeneous production of the bubbles. These reliefs may also promote the collapse of the bubbles, because the differences in levels along the longitudinal axis make it possible to generate relatively extensive cavitation zones, not limited to a single plane. In addition to the reliefs of the emission surface 10 which contribute to improving the production of the bubbles, the emission surface may have reliefs which pursue another purpose, for example exercising an action of retaining the fluid or cleaning the zone to be treated.These are, for example, reliefs made of a flexible material, for example hairs, in particular flocking hairs.

[0185] The handpiece 2 may further comprise an electronic circuit 14.

[0186] The electronic circuit 14 may comprise a control unit capable of communicate with a human-machine interface 17, visible in particular in [Fig. 7], the interface 17 being able to include a screen 171 and / or control buttons 172 and / or indicator lights 173, or even communicate via a wireless link with a terminal such as than a mobile phone. The indicator lights 173 can provide information to the user on the operating status of the device and / or its operating mode, in particular by means of colored LED lighting and / or flashing.

[0187] The human-machine interface 17 makes it possible in particular to carry out a remote diagnosis of the device, to reprogram it, to upgrade its software, and / or to automatically send commands for the delivery of accessories to replace used accessories, cleaning and / or treatment products.

[0188] The human-machine interface 17 can make it possible to adjust certain operating parameters of the device 1, for example the intensity with which the acoustic waves are emitted.

[0189] The electronic circuit 14 can control the operation of the pump 11, the suction pump 30, a battery 18 powering the device (in particular its load) and receive data from one or more sensors (not shown) such as a contact sensor of the device on the keratin materials.

[0190] The electronic circuit 14 can also communicate with an optical detector, not shown, making it possible to detect the presence of a compound to be removed from the surface of the keratin materials, and possibly determine the quantity present.

[0191] The electronic circuit 14 can also detect when the handpiece 2 is received on the support 3 and then start the pump to allow the circulation of the composition C in a closed loop in the handpiece 2, allowing the cleaning and disinfection of the circuit 6 and the reservoir 7, as illustrated in [Fig.5].

[0192] The electronic circuit 14 is connected by a connector 15 to an electronic generator 16, supplying in particular the transducer 13. This generator 16 comprises for example an oscillator and a power stage.

[0193] The electronic circuit 14 may only start the pump 11 and / or the suction pump 30 and / or the emission of acoustic waves by the transducer 13 when the area to be treated is in contact with the skin or with a sealing part, in particular in a manner which allows the composition to be recycled.

[0194] The battery 18 may be removable, it may be used to power the entire device 1, or only a part, in particular the pump 11. The battery 18 may be of various types, for example Li-ion or NiMH, preferably of a type suitable for humid conditions or which can be immersed in a liquid at least partially. The battery 18 is preferably rechargeable. The battery 18 is preferably selected to ensure, without having to be recharged, the power supply of the device 1 during several consecutive treatments, or even several treatments and cleaning of the device 1. Support

[0195] The support 3 comprises, as illustrated in [Fig.6A], a first housing 8 for accommodate the handpiece 2 and a second housing 9 to accommodate the reservoir with an opening 71 of the reservoir 7, facing downwards.

[0196] The reservoir 7 can be accommodated in the housing 9 of the support, as visible in FIGS. 3A and 3B, while the handpiece 2 separated from the reservoir 7 is accommodated in the housing 8 of the support 3.

[0197] The support 3 comprises a closing part 31 arranged so as to cooperate with the surface 10 of the treatment head 5 to close the fluid circuit, while allowing for example the fluid to circulate in the treatment zone.

[0198] The device is for example charged using a USB port (not shown), in particular arranged on the support 3. The support 3 comprises for example, as illustrated, a first connector 32 and the handpiece 2 a second connector 22 arranged to connect to the first connector 32 when the handpiece 2 is received on the support 3, this connection allowing the handpiece 2 to be charged. The connectors 22 and 32 may be connectors of which at least one is spring-loaded.

[0199] Alternatively, the handpiece 2 can be charged by induction when it is received on the support 3.

[0200] The battery 18 can also be removed and charged separately.

[0201] The device 1 comprises at least one UV radiation source 20, for example one or more UV-C lamps, making it possible to clean and disinfect the internal and external surfaces of the device.

[0202] The UV radiation source 20 allows the disinfection of all or part of the internal and / or external parts of the device 1, in particular the reservoir 7, the circuit 6, the treatment and purification unit 40, the pumps 11 and 30 and / or the surface(s) of the device in contact with the keratin materials.

[0203] The surfaces in contact with the keratin materials are for example the treatment head 5, a grid, and / or a guide and / or combing member.

[0204] Each UV radiation source may emit radiation with a wavelength between 100 nm and 400 nm, preferably between 100 nm and 280 nm (UV-C radiation), in particular between 250 nm and 270 nm, for example equal to 254 nm, 265 nm or 185 nm. The UV radiation source may comprise a UV-C LED, which allows energy savings and a long service life of the source. The UV radiation source may emit UV radiation with an intensity I between 2.9 mW / cm2 and 1080 mW / cm2.

[0205] The UV radiation may pass completely or partially through the materials constituting the device, and / or any liquid and / or other compound stored and / or conveyed in the device. The UV radiation may be reflected, completely or partially, by materials constituting the device.

[0206] As illustrated in Figures 4 and 5, UV-C radiation sources 20 may be located on handpiece 2, for example to expose part of the fluid circulation circuit and / or the reservoir to UV radiation.

[0207] As illustrated in Figures 6A and 6B, the UV-C lamps 20 may be located on the support 3. These UV-C lamps 20 are for example located at the level of the closing part 31, in order to disinfect the surface 10 of the treatment head 5 and the openings 101 and 102, and at the level of the housing 9 near the opening 71 of the reservoir 7 when it is received in the housing 9, in order to disinfect the latter.

[0208] UV-C 20 lamps are, for example, OSLON® UV 3535, SU CULBN2.VC LED lamps from the OSRAM brand, with an emission peak at 275 nm. This lamp model has the advantage of being compact and economical.

[0209] Use for the treatment of keratin materials

[0210] The device 1 can be used for the treatment of keratin materials K, for example skin.

[0211] The treatment head 5 is thus brought into contact with the keratin materials K by the user manipulating the handpiece 2, and the latter can start the device 1 while the treatment head is applied against the keratin materials. The composition C coming from the reservoir 7 then circulates in the circuit 6, in particular in the conduit 6a, by driving the pump 11. The composition C circulating in the conduit 6a is released in contact with the keratin materials K through the opening 101.

[0212] The transducer 13 generates acoustic waves allowing the formation of bubbles within the cosmetic composition C, and their collapse, thus allowing the desired treatment of the keratin materials K.

[0213] Composition C is reinjected, at least in part, into circuit 6, in particular thanks to the suction pump 30. Composition C enters the treatment head 5 through the opening 102 to be sent to the treatment and purification unit 40.

[0214] At the outlet of the treatment and purification unit 40, the composition C is returned to the tank 7. Cleaning and disinfection

[0215] After use, the device may be cleaned by implementing one of the methods illustrated in Figures 5 or 6B, or both methods one after the other.

[0216] In [Fig.5], the handpiece 2 is accommodated on the support 3 with the reservoir 7 not separated. The circulation of the liquid contained in the reservoir is ensured by starting the pump 11. The closure part 31 closes the treatment zone thanks to the sealing element 103, so that the composition circulating in the conduit 6a and exiting through the opening 101, returns to the circuit 6 and the reservoir 7 after having been reinjected into the circuit 6 through the opening 102, this thanks to the suction of the pump 30.

[0217] During this cleaning, the tank 7 may be previously filled with a disinfectant and / or cleaning composition in order to improve the cleaning and disinfection of the circuit 6 and the tank 7.

[0218] In [Fig.6B], in step A, the reservoir 7 is separated from the handpiece 2. Then it is positioned in the housing 9 of the support 3 in step B, with the opening 71 of the reservoir 7 facing downwards. In step C, the reservoir 7 is drained in the housing 9. Finally, in step D, the handpiece 2 is received in the housing 8 of the support 3 with the surface 10 of the treatment head 5 facing the closure part 31, and the UV radiation sources 20 are switched on in order to disinfect the reservoir 7 and the surface 10, as well as the openings 101 and 102 present on the treatment head and the circuit 6.

[0219] In a variant not illustrated, the reservoir 7 is not separated from the handpiece 2 and the latter is received in the housing 8 of the support 3, with the surface 10 of the treatment head 5 facing the obturation part 31. The method described in [Fig. 5] is then implemented and the UV radiation sources 20 of the support 3, as illustrated in [Fig. 6A], are also switched on. The reservoir 7 is for example made of a material transparent to UV so that the latter can contribute to disinfecting it.

[0220] In another variant not illustrated, the support 3 comprises a single source of UV radiation, located at the level of the obturation part 31. The reservoir 7 is not separated from the handpiece 2 and the latter is received in the housing 8 of the support 3, with the surface 10 of the treatment head 5 facing the obturation part 31. The method described in [Fig.5] is then implemented and the source of UV radiation is switched on. Implementation variants

[0221] Figures 8 and 9 show a variant of device 1. This device comprises a handpiece 2 comprising two reservoirs 7a and 7b which cannot be separated from the handpiece 2, and does not comprise a support 3.

[0222] The handpiece 2 is arranged to distribute the composition C onto an area of ​​keratin materials K to be treated, through at least one opening 101 located at the level of the treatment head 5. The reservoir 7a is for example a reservoir of composition to be distributed, it is connected to the pump 11 by a conduit 63 which can, as illustrated, send the composition C to the treatment area through a conduit 61 opening through the opening 101. The reservoir 7b recovers the composition C which has been in contact with the area to be treated by means of a conduit 62 which opens into an opening 102.

[0223] In the devices of Figures 8 and 9, UV-C lamps 20 are located inside the handpiece 2, respectively in the treatment head 5 and inside the tank 7.

[0224] In the example of [Fig.8], the wall 23 of the handpiece 2 may be covered on the inside with aluminum, in particular aluminum foil, making it possible to reflect the UV radiation in order to concentrate it inside the handpiece, with the aim of obtaining better disinfection of the elements present inside it. The walls 72 of the reservoir 7 and the walls 64 of the circuit 6 are for example made of FEP, which is a plastic material making it possible to transmit the UV radiation inside the circuit 6 and the reservoir 7.

[0225] In the example of [Fig.9], the wall 72 of the tank and the wall of the circuit 6 can be covered on the inside with aluminum, in particular aluminum foil, in order to concentrate the UV radiation inside the tank 7 and the circuit 6 for better disinfection thereof. The UV lamp 20 also makes it possible to disinfect the composition C circulating in the circuit 6.

[0226] The treatment head 5 comprises in this example a transducer 13 arranged relative to a spacer 50 so as to provide a space E between the surface for emitting the acoustic waves and the surface of the keratin materials K to be treated.

[0227] The spacer 50 advantageously comprises at least one leg extending axially over less than 360° around the axis of the transducer 13, in front of the emission surface. By “in front”, it is meant that the leg extends beyond the emission surface in the direction of the keratin materials K to be treated. The spacer 50 may be in the form of an end piece attached to the rest of the treatment head 5 by means of a fixing part, or be monolithic with the body thereof, for example.

[0228] The treatment head 5 may comprise, as illustrated, a grid 19, preferably at least partially non-absorbent, defining a contact surface with the keratin materials K to be treated. The grid 19 has at least one opening through which the waves emitted by the transducer 13 can propagate in the direction of the materials K to be cleaned. Thanks to the grid 19, it is possible to control more precisely the distance between the transducer 13 and the surface of said keratin materials K, which makes it possible to improve the action of the bubbles in the vicinity of the surface of the keratin materials K, while avoiding direct contact of the transducer 13 with these keratin materials K. The grid 19 is preferably removable.This makes it easier to clean and allows it to be replaced between uses, or, if desired, to interchange several grids depending on the use, for example by choosing the type of grid best suited to the morphology of the area to be cleaned.

[0229] The device 1 may comprise at least one fluid circulation conduit extending along the leg(s), or in them, or more generally in the support part of the grid and / or in the latter. This conduit may be made of a material transparent to UV.

[0230] Of course, the invention is not limited to the examples which have just been described. The support 3 and the handpiece 2 of the same device 1 may in particular both comprise at least one source of UV radiation 20.

[0231] The device may comprise a bubble generator for generating additional bubbles within the fluid. The bubble generator may be arranged in the device 1 so as to generate bubbles beforehand, simultaneously or cyclically with respect to the emission of the acoustic waves.

[0232] In the case of hair treatment, the device according to the invention may comprise at least one guide and / or combing member arranged to guide the hair in its movement near and / or in contact with the emission surface of the transducer. The guide and / or combing member may be arranged to guide the hair laterally, for example by having stops between which the hair is engaged. The guide and / or combing member may comprise at least one lateral hair guide surface, making it possible to hold the hair during its treatment. The guide and / or combing member may be fixed removably or not on the device.

[0233] The handpiece may have only one pump which ensures the circulation of the fluid in the treatment area, and its return to a reservoir intended to recover the used fluid.

Claims

Claims

1. Device (1) for treating human keratin materials (K), in particular skin and / or hair, comprising a handpiece (2) comprising: - a treatment head (5) to be placed in contact with the keratin materials (K) to be treated, defining at least one treatment zone, - at least one reservoir (7) for containing a fluid, in particular a cosmetic composition (C), used during the treatment, - at least one circuit (6) for circulating the fluid used during the treatment, comprising at least one channel (6a; 61) for supplying the fluid to the treatment zone from the reservoir (7) and at least one channel (6b;62) return of the fluid from the treatment zone, the device (1) further comprising: - a closure part (31), intended to be placed in contact with the treatment head (5) in the absence of use of the device (1) for treating the human keratin materials (K), this closure part (31) having a surface arranged to close the treatment zone so as to allow the recirculation of the fluid in the circuit (6) for circulation of the fluid in the absence of contact of the treatment head (5) with the human keratin materials (K).;

2. Device according to claim 1, the handpiece (2) comprising at least one ultrasonic transducer (13) for emitting acoustic waves at least into the fluid present in the treatment area.

3. Device according to one of claims 1 and 2, the handpiece (2) comprising at least one electric pump (11) for circulating the fluid in the circuit (6) for circulating the fluid between the reservoir(s) (7) and the keratin materials (K) to be treated.

4. Device according to any one of the preceding claims, the device (1) comprising a support (3) arranged to receive the handpiece (2) when the device (1) is not used for the treatment of keratin materials (K), this support (3) being in particular arranged to electrically supply the pump (11) when the handpiece (2) is received in the holder (3).

5. Device according to the preceding claim, the closure part (31) being defined by the support (3).

6. Device according to one of claims 4 or 5, the support (3) and the handpiece (2) having electrical contacts (32; 22) which come into mutual contact when the handpiece (2) is received on the support (3).

7. Device according to any one of the preceding claims, comprising at least one source of UV radiation (20).

8. Device according to the preceding claim and claim 4, the support (3) electrically supplying the UV radiation source (20), in particular while the handpiece (2) is supplied by the support (3), thanks to electrical contacts present on the support and on the handpiece and which come into mutual contact when the handpiece is received on the support or by induction.

9. Device according to any one of the preceding claims, the fluid, in particular the cosmetic composition (C), comprising at least one surfactant.

10. Device according to any one of the preceding claims, the reservoir (7) being removable.

11. Device according to the preceding claim and claim 4, the support (3) comprising a housing (9) arranged to accommodate the reservoir (7) separate from the handpiece (2).

12. Device according to any one of the preceding claims and claim 6, at least one UV radiation source (20) emitting UV radiation inside the reservoir (20).

13. Method for cleaning and disinfecting a device (1) for treating keratin materials (K) as defined in any one of the preceding claims, the method comprising: (1) positioning the handpiece (2) on the support (3) so that the closure part (31) comes into contact with the handpiece (2) and closes the treatment area, (2) recirculating the fluid in the fluid circulation circuit (6).

14. Method according to the preceding claim, the support (3) feeding the handpiece (2) when the latter is positioned on the support (3).

15. Method according to one of claims 13 or 14, comprising: (3) separating said at least one reservoir (7) from the handpiece (2), (4) positioning the tank (7) thus separated on the support (3).

16. Method according to any one of claims 13 to 15, the fluid which circulates during the cleaning phase being water, a cleaning composition containing at least one cleaning active ingredient, or the cosmetic composition (C) used elsewhere during the treatment of keratin materials (K).

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