Apparatus for processing human keratin material

Abstract

The present invention relates to a device, in particular an electrophoretic device, for the treatment of human keratin material, which delivers a cosmetic or dermatological composition onto the human keratin material and applies an electric current, the applied composition being contained in a In the cylindrical body (20) carried by the device, the cylindrical body has a main body and a piston constituting a reservoir, the transmission screw passes through the piston, and the piston can move in the main body under the action of the relative rotation of the screw rod and the piston, and the device includes An electric drive motor (70) for causing this relative rotation of the screw and piston, and an electronic circuit for controlling the motor.

Description

technical field [0001] The present invention relates to a device for treating human keratin material by applying a cosmetic or dermatological composition thereto and applying an electric current. Background technique [0002] Application of an electrical current to the skin is known to facilitate penetration of active agents. Thus, the treatment of human keratin materials by means of iontophoresis devices is known. Iontophoresis enables the diffusion of active agents through the skin by electrical stimulation in a non-invasive manner. The applied current can be adjustable in strength and polarity (anodic or cathodic). Transdermal diffusion of molecules by iontophoresis is based on two principles, electrorepulsion and electroosmosis. [0003] Electrorepulsion is the movement of ionized molecules caused by the repulsion of charges of the same sign. Therefore, positively charged species will diffuse through the skin at the anode (+). [0004] Electroosmosis is the movement...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of this system is its axial space requirement, since when the reservoir is full, the entire threaded element is located outside the reservoir

This limits the volume of the reservoir and imposes space constraints that limit the ergonomically possible shapes

[0007] Finally, each time the reservoir is replaced, the threaded element must be returned to its original position, thereby complicating the operation of changing the reservoir

[0008] There is a need to be able to precisely meter the amount of product dispensed by the treatment device, in order to avoid in particular an excess composition that might increase the intensity of the electric current passing through the human keratin material, because of the conductive properties of the composition, or, conversely, to avoid an insufficient amount of composition material, which impairs the establishment of current and thus has an adverse effect on the normal operation of the device

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