END PIECE
The end piece may have any geometric shape. The external surface of the end piece forms the application surface in which the electrodes are embedded.
The material may be predominantly in a non-oxidized form.
The application surface may be completely inert from a chemical point of view with respect to the products and keratin materials.
The application surface may be covered with a varnish.
The application surface may be polished.
The end piece may have a biocidal material, for example silver or copper, on its surface. Such a metal may be deposited in the form of a thin layer.
According to one embodiment of the invention, the application surface is smooth. In this case, the device is particularly suitable for wide areas such as the cheeks or the forehead, if a massaging action is not desired.
According to another embodiment of the invention, the end piece has an external surface provided with at least one relief.
In this case, the device may also serve to massage a chosen area of the body. Advantageously, the relief has at least one boss on which the electrodes are disposed.
The relief element may in particular be chosen from spikes, balls and rollers. The relief elements may themselves be smooth or have complementary raised areas.
More advantageously, the boss comprises a rotary head (roll-on).
In particular, the head is a ball or a cylinder. Alternatively, the relief elements may be removable. It is thus possible to change the relief elements of the device, for example in order to modify their dimensions, their surface properties, or else their roughness.
The relief elements may comprise a thermoplastic material of the acrylic type, cellulose type, polycarbonate type, polyamide type, styrene type, polyolefm type, vinyl type or polyethylene terephthalate type and mixtures of said materials in a variable proportion, which are expanded or not expanded. The relief elements may also comprise one or more thermoplastic resins or one or more metals.
The electrodes may be removable, flexible or mounted on ball joints for example in order to better optimize contact with the reliefs of the skin.
SUPPLEMENTARY FUNCTIONS
The device may comprise one or more treatment modules which can be activated selectively, for example it is conceivable to subject the end piece to light, to a source of heat, or even to vibrations, as will be explained in detail below. i) Source of light
According to the invention, the device advantageously comprises a source of light.
The source of light may be, for example, at least one LED, as described in the documents FR-A-2 917 299, US-A-2010/274329 or WO-A-2008/057640. ii) Source of heat
According to the invention, the device advantageously comprises a source of heat.
In this case, it is possible to modify the temperature of the external surface of the end piece and/or of the region treated and/or to transmit energy to the external surface of the end piece and/or to the region treated.
The device may comprise for example a heating resistor or a thermoelectric element or an infrared source which is positioned under the end piece.
Preferably, the source of heat comprises an infrared source or a resistor. The device may comprise a heating module and be configured to heat the external surface of the end piece to a predefined temperature, for example to a temperature of between 35°C and 45°C. In the case of a device comprising a heating module, the heating surface can reach a temperature of 10°C to 35°C greater than room temperature, preferably of 15°C to 25°C greater in heating mode. The power delivered by the heating module may be between 0.25 and 10 W, preferably between 0.5 and 5 W.
More preferably, the source of heat is housed entirely inside the device.
The resistor may be connected to a board by two insulated connectors, using for example the location of the switches.
The infrared source may be integrated into the body of the device, such as the handle. The external part of the device, for example a shell, can serve to guide the infrared radiation towards the end piece.
The electrical circuit may comprise at least one electronic switch which is connected in series with the heating member and makes it possible for example to supply it with power at the desired ratio.