Device for cosmetic treatments

1. A device for cosmetic treatment comprising a body consisting of a first section, arranged at a first end of the body, in which a drive motor of the device is arranged, a second section, arranged at a second end of the body, opposite the first end, in which a needle-holding cartridge is fitted, and a third section, that connects the first section to the second section, in which a drive means is housed, wherein said needle-holding cartridge comprises a support element configured for supporting a single needle, or a plurality of needles, wherein said support element is movable inside a casing of said needle-holding cartridge and is driven to move inside said casing by said drive means between a start position in which said needle(s) do not protrude outside said body and an end position in which said needle(s) protrude from said body for a preset distance, wherein said third section comprises an adjusting ring nut rotatable around a longitudinal axis of the body, wherein a rotation of said adjusting ring nut determines a variation of the start position of said support element and of said preset distance, characterized in that on an outer surface of the adjusting ring nut a first graduated scale and a second graduated scale are impressed and on the second section of the body an indicating element is impressed that is associated with both the graduated scales, said first graduated scale and said second graduated scale indicating values of said preset distance.

2. The device of claim 1 , wherein said first graduated scale comprises values between 0 and 0.3 mm and is associated with said needle-holding cartridge so configured that a maximum protrusion of the needle(s) from the body of the device, when the support element is in said end position, is not greater than 0.3 mm.

3. The device of claim 1 , wherein said second graduated scale comprises values between 0 and 2.5 mm and is associated with said needle-holding cartridge so configured that a maximum protrusion of the needle(s) from the body of the device, when the support element is in said end position, is not greater than 2.5 mm.

4. The device of claim 1 , wherein said casing is provided with a hole, or with a first opening, placed at a first end of the casing, said needle(s) protruding from said hole or from said first opening when said support element is in said end position, wherein said support element is provided with a rod-shaped appendage that protrudes from the casing through a second opening placed at a second end of the casing, opposite the first end, wherein said appendage interacts with said drive means.

5. The device of claim 4 , wherein on said appendage a coil spring is fitted, arranged between a first collar that is part of the appendage and a second collar obtained in the casing.

6. The device of claim 1 , wherein said casing is provided with an outer thread by which the needle-holding cartridge is configured to be tightened in a threaded hole made at the second end of the body.

7. The device of claim 4 , wherein said drive means comprises a first disc-shaped thrust element, fitted inclined with respect to said longitudinal axis on an outlet shaft of the drive motor of the device, a further disc fitted to a first end of a rod-shaped second thrust element, arranged along said longitudinal axis, wherein said first thrust element interacts periodically with said further disc by exerting thereupon a thrust that is variable between a minimum value and a maximum value, and vice versa, wherein a second end of said second thrust element is in contact with the appendage of the support element when said needle-holding cartridge is screwed into a threaded hole.

8. The device of claim 1 , wherein said drive motor is supplied by a feeder that is connectable to a power grid and to the drive motor.

9. The device of claim 1 , wherein said drive motor is supplied by a rechargeable battery housed in the body.