阅读说明：本技术 电流施加用针尖、手持件以及皮肤处理装置 (Current application needle tip, handpiece, and skin treatment device ) 是由 姜栋丸 善惠珍 于 2020-07-17 设计创作，主要内容包括：本发明涉及一种配备有针头的电流施加用针尖、手持件以及皮肤处理装置,所述针头形成有随着除了针头的末端以外的一部分区域以非绝缘的状态暴露而以电磁方式通电的有源区。(The present invention relates to a current-applying needle tip equipped with a needle formed with an active region electromagnetically energized as a partial region other than the tip of the needle is exposed in a non-insulated state, a handpiece, and a skin treatment device.)

1. A current applying needle tip comprising:

a needle head fixing part; and

a plurality of needles having a first insulating region formed at a distal end thereof and at least one active region and at least one second insulating region formed at a remaining portion thereof, the plurality of needles being disposed at one side of the needle fixing portion and applied with an electric current,

wherein the active region is exposed to electromagnetically energize,

the first insulating region and the second insulating region are formed by coating with an insulator.

2. The current-applying needle tip according to claim 1,

the plurality of needles output different or same polarity between adjacent needles, each of the needles having more than one of the active regions disposed at the same height,

electrical energy is provided only to a specific depth of skin through an energy transmission region formed between the active regions of the respective needles.

3. The current-applying needle tip according to claim 2,

the active regions are formed to have the same size.

4. The current-applying needle tip according to claim 2,

and adjusting the size of the energy transmission area formed on the skin by adjusting the intensity of the current applied to the plurality of needles.

5. The current-applying needle tip according to claim 4,

when the plurality of tips have a plurality of active regions spaced apart from each other,

the plurality of energy transfer regions formed between the plurality of active regions are diffused by adjusting the intensity of the current applied to the plurality of needles to 20W to 50W.

6. The current-applying needle tip according to claim 2,

of two needles adjacent to each other among the plurality of needles, one outputs (+) polarity and the other outputs (-) polarity.

7. A hand piece characterized by being mounted with the current-applying needle tip according to claim 1.

8. A skin treatment device, comprising:

a housing for inhalation to a target site on a skin surface;

a needle cassette mounted at one side of the housing;

the current-applying needle tip according to claim 1, disposed inside the needle cartridge;

a driving unit configured to reciprocate the current application needle tip inside or outside the needle cassette;

a power supply unit for applying a current to the plurality of needles of the current application needle tip; and

and a control unit that controls the drive unit and the power supply unit.

9. Skin treatment device according to claim 8,

the needle box has a first space formed between a contact surface contacting the skin and a needle fixing part of the current application needle tip,

the first space creates a negative pressure before the needle is inserted into the skin.

10. A method of manufacturing a current-application needle tip according to any one of claims 1 to 7, comprising the steps of:

preparing a conductive substance to be generated to a thickness of an active region corresponding to the non-insulating region;

coupling a plurality of needles to the needle fixing part;

inserting a plurality of needles into the conductive material up to positions of the plurality of needles where active regions are to be formed; and

and ejecting an insulating material in a state where the plurality of needles are inserted into the conductive material to form a first insulating region and a second insulating region.

Technical Field

The present invention relates to a current-applying needle tip equipped with a needle formed with an active region electromagnetically energized as a partial region other than the tip of the needle is exposed in a non-insulated state, a handpiece, and a skin treatment device.

Background

Generally, the human skin acts as a primary barrier against environmental influences such as the sun, cold and wind. With aging, the skin loses its viable appearance and wrinkles develop due to environmental influences.

From the outside to the inside, the skin is composed of an epidermis having a thickness of about 100 μm, a dermis layer having a thickness of about 4mm below the epidermis, and a subcutaneous layer below the dermis layer.

This dermal layer is composed of collagen, glycosaminoglycans and proteoglycans, and the subcutaneous layer has elastic fibers that connect the differences between the collagen and the subcutaneous layers of the dermal layer.

Among these, collagen and elastic fibers provide toughness and elasticity to the skin, but may lose toughness and elasticity with aging and exposure to sunlight. As a result, skin vitality may be reduced, and thus many skin treatment devices for providing skin vitality are being developed.

Such a skin treatment device is a device for treating skin for the purpose of treating various scars or skin diseases, or for the purpose of beauty such as skin improvement or wrinkle improvement, which delivers various energy sources to the skin, thereby inducing scars on the skin and stimulating collagen of the skin to induce a regeneration action of collagen.

The skin treatment apparatus has various types such as a mode of transmitting ultrasonic waves (HIFU type), a mode of transmitting electric energy (RF type), and a mode of transmitting laser light (Optical type).

Wherein the radiofrequency current is applied after the invasive application of the insulated needle or the non-insulated needle to the skin with the skin treatment device in a manner that transmits electrical energy. As a result, the electrical energy is transmitted to the deep part of the skin through the insulated needle or the uninsulated needle.

Fig. 1 to 2 are views showing a needle used in a conventional skin treatment device.

Conventionally, a method of applying electric energy (RF) to a treatment site of skin 20 by inserting an insulated needle 10 of fig. 1 and a non-insulated needle 30 of fig. 2 into epidermis 21 and dermis 22 of skin 20 has been used. However, as the concentration of the electric energy to the sharp tip is shown due to the characteristic that the electric energy is concentrated to the tip of the needle, the electric energy is concentrated around the tip for both the insulated needle 10 and the non-insulated needle 30 entirely coated with the insulator 11 except for the tip 12. Therefore, there is a problem that only the skin 20 portion where the tip portion is located is excessively burned.

Furthermore, there is a problem that the insulated needle 10 can only transmit power to the skin 20 where the tip portion 12 is located, and cannot transmit power to the skin 20 located at the side of the needle.

Furthermore, all portions 31 of the non-insulated needle 30 are not coated with an insulator and thus can transmit power to the side of the needle, but transmit power to all surfaces contacted by the needle, thereby presenting problems of increased total energy and causing excess energy. Further, there are also problems as follows: as described above, the non-insulated needle 30 may also concentrate electric energy at the tip, which may be a cause of unnecessary pain.

In addition, the non-insulated needle 30 cannot transmit electric energy only to a certain depth of the skin 20 but transmits electric energy to all parts where the needle is inserted, and thus there is a problem that it is impossible to treat only the skin 20 corresponding to a certain target depth.

Disclosure of Invention

Technical problem

The present invention has been made to solve the above problems, and an object of the present invention is to provide a current application needle tip capable of supplying electric energy to only a specific depth of the skin.

Further, another object of the present invention is to provide a current application needle tip capable of preventing excessive electric energy concentrated to a tip of a needle from being transmitted to the skin.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

Technical scheme

A current application tip according to an embodiment of the present invention includes: a needle head fixing part; and a plurality of needles having a first insulating region formed at a distal end thereof, at least one active region and at least one second insulating region formed at a remaining portion thereof, the plurality of needles being disposed at one side of the needle fixing portion and being applied with a current, wherein the active region is exposed and electromagnetically energized, and the first insulating region and the second insulating region may be coated with an insulator.

In addition, since the plurality of needles output different or the same one polarity between adjacent needles and each of the needles has more than one of the active regions disposed at the same height, electric power can be supplied only to a specific depth of the skin through an energy transfer region formed between the active regions of the respective needles.

In addition, the respective active regions may be formed in the same size.

In addition, the size of the energy transmission area formed on the skin can be adjusted by adjusting the intensity of the current applied to the plurality of needles.

Further, when the plurality of needles have a plurality of active regions spaced apart from each other, it is possible to diffuse a plurality of energy transmission regions formed between the plurality of active regions by adjusting the intensity of current applied to the plurality of needles to 20W to 50W.

In addition, one of the two adjacent needles of the plurality of needles outputs (+) polarity, and the other outputs (-) polarity.

A handpiece according to an embodiment of the present invention may be equipped with the aforementioned current application tip.

A skin treatment device according to an embodiment of the present invention may include: a housing for inhalation to a target site on a skin surface; a needle cassette mounted at one side of the housing; a current-applying needle tip of a first item disposed inside the needle cartridge; a driving unit configured to reciprocate the current application needle tip inside or outside the needle cassette; a power supply unit for applying a current to the plurality of needles of the current application needle tip; and a control unit that controls the drive unit and the power supply unit.

Further, the needle cassette has a first space formed between a contact surface contacting the skin and the current application needle tip, and the first space may form a negative pressure before the needle tip is inserted into the skin.

The method for manufacturing the current application needle tip according to an embodiment of the present invention may include the steps of: preparing a conductive substance to be generated to a thickness of an active region corresponding to the non-insulating region; coupling a plurality of needles to the needle fixing part; inserting a plurality of needles into the conductive material until the needles are inserted to positions where active regions are to be formed; and forming a first insulating region and a second insulating region by injecting an insulating material in a state where the plurality of needles are inserted into the conductive material. Other details of the invention are included in the description and the accompanying drawings.

Technical effects

Accordingly, the current-applying needle tip according to an embodiment of the present invention can supply electric energy to only a specific depth of the skin through the energy transfer regions formed between the active regions of the respective needles since the active regions of the respective needles are arranged at the same height for the plurality of needles.

Further, since the tip of the needle of the current application needle tip according to an embodiment of the present invention is insulated, it is possible to prevent excessive electric energy concentrated to the tip of the needle from being transmitted to the skin.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

Drawings

Fig. 1 to 2 are views showing a needle used in a conventional skin treatment device.

Fig. 3 is an exploded perspective view illustrating a skin treatment device according to an embodiment of the present invention.

Fig. 4 is a sectional view showing a skin treatment device according to an embodiment of the present invention.

Fig. 5 is a plan view (bipolar type) showing a state where a needle is arranged at a needle fixing portion for a current-applying needle tip according to an embodiment of the present invention.

Fig. 6 is a schematic view showing a needle according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of the energy transmission region of a current application tip (bipolar type) according to an embodiment of the present invention.

Fig. 8a and 8b are comparative diagrams (bipolar type) for explaining the power transmission effect of the needle according to an embodiment of the present invention.

Fig. 9 is a graph showing a depth to a coagulated region formed at the epidermis of the skin by a plurality of first needles according to an embodiment of the present invention, is a graph showing a length of the coagulated region, and is a graph showing a width of the coagulated region.

Fig. 10a and 10b are comparative diagrams (unipolar type) for explaining the power transmission effect of the needle according to an embodiment of the present invention.

FIG. 11 is a schematic diagram illustrating energy transmission regions of a first needle and a second needle in accordance with an embodiment of the present invention.

FIG. 12 is a perspective view showing a handpiece in accordance with an embodiment of the present invention.

Fig. 13 is a sectional view showing a current application tip mounted on a handpiece according to an embodiment of the present invention.

Fig. 14 is a sectional view showing that a pumping effect occurs at a current application tip mounted to a handpiece in accordance with an embodiment of the present invention.

Detailed Description

The advantages and features of the present invention and the manner of attaining them will become apparent by reference to the following detailed description of an embodiment taken in conjunction with the accompanying drawings. However, the present invention can be implemented in various forms different from each other, and is not limited to the embodiment disclosed below, and the embodiment is provided only to complete the disclosure of the present invention and to fully inform the scope of the present invention to those skilled in the art to which the present invention pertains, and the present invention is defined only by the scope of the claims.

The terminology used in the description is for the purpose of describing one embodiment only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically mentioned in the sentence. The use of "comprising" and/or "including" in the specification does not exclude the presence or addition of one or more other constituent elements than the mentioned constituent elements. Throughout the specification, the same reference numerals refer to the same constituent elements, and "and/or" includes each and all combinations of one or more of the constituent elements mentioned. Although the terms "first", "second", etc. are used to describe various constituent elements, it is obvious that these constituent elements are not limited by these terms. These terms are only used to distinguish one constituent element from another constituent element. Therefore, the first component mentioned below is within the technical idea of the present invention, and may be obviously the second component.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in the same sense as commonly understood by one of ordinary skill in the art to which this invention belongs. Furthermore, terms defined in commonly used dictionaries may not be interpreted ideally or excessively unless expressly defined otherwise.

As described in the drawings, "lower", "upper", and the like as spatially relative terms may be used for convenience in describing a correlation between one constituent element and another constituent element. Spatially relative terms should be understood to include different orientations of the components in use or operation in addition to the orientation depicted in the figures. For example, when a component shown in the drawings is turned over, a component described as "lower" or "lower" of another component may be positioned "upper" of another component. Thus, "below" as an exemplary term may include both below and above directions. The constituent elements may also be oriented in other directions, and the spatially relative terms may be interpreted accordingly.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 3 is an exploded perspective view illustrating a skin treatment device according to an embodiment of the present invention, and fig. 4 is a sectional view illustrating the skin treatment device according to an embodiment of the present invention.

As shown in fig. 3 to 4, the skin treatment device according to an embodiment of the present invention may include a housing 110, a current applying needle tip, a driving part 140, a power supply part 150, a connector 160, a needle cartridge 170, a connection part 180, and a control part (not shown).

The housing 110 accommodates the driving part 140 and the power supply part 150, one side of the housing 110 is replaceably combined with the needle cartridge 170, and the other side of the housing 110 is combined with the connector 160 through the connection member 180.

The housing 110 may be separated into a left side housing and a right side housing. Such left and right side housings may be detachably coupled by bolts 113, insertion members 114, first coupling members 111, and second coupling members 112. Wherein the bolt 113 may screw-couple the left and right casings, the insertion part 114 may surround a head of the bolt 113, and the first and second coupling parts 111 and 112 may be respectively insertion-coupled at one end and the other end to the left and right casings 110 and 110.

The other side of the housing 110 is coupled with the connection member 180 by the third coupling member 115 and the fourth coupling member. The interiors of the third coupling member 115, the fourth coupling member 116, and the connection member 180 may be communicated for electrical wires passing through the connector 160.

The current-applying needle tip, which transmits electric energy generated by the current applied from the power supply part 150 to a target site of the skin, functions to remove damaged collagen, elastic fiber, etc. in the target site of the skin and promote new formation, may include the needle fixing part 120 and the plurality of needles 130.

The needle fixing part 120 is disposed inside the needle magazine 170, is provided to be capable of moving back and forth inside or outside the needle magazine 170 by the driving part 140, and functions to fix the plurality of needles 130. Therefore, when the needle fixing part 120 is reciprocally moved inside or outside the needle magazine 170 by the driving part 140, the plurality of needles 130 may be reciprocally moved inside or outside the needle magazine 170 by the driving part 140.

For example, the plurality of needles 130 may be arranged to have at least one of one or more rows and one or more columns on one surface of the needle fixing part 120.

Further, a plurality of through holes for fixing the plurality of needles 130 may be formed on one surface of the needle fixing portion 120.

The plurality of needles 130 invade the skin and serve to transmit electric energy generated by the current applied from the power supply part 150 to a target portion of the skin.

Specifically, the plurality of needles 130 are moved and projected to the outside of the needle magazine 170 together with the needle fixing portion 120 by the driving portion 140 in a state where the contact surface of the needle magazine 170 is in contact with the surface of the skin, and after entering the skin, transmit the electric energy generated by the current applied from the power supply portion 150 to the target site of the skin.

On the other hand, the plurality of needles 130 invaded into the skin needs to be rapidly discharged to prevent the risk of accident and to reduce the pain of the skin. Therefore, the control unit described later drives the driving unit 140 so that the plurality of needles 130 that have entered the skin can be rapidly discharged, and the plurality of needles 130 that have entered the skin can be rapidly discharged.

The plurality of needles 130 may be implemented in a Bipolar (Bipolar) manner in which both the needles 130 of (+) polarity and the needles 130 of (-) polarity are included. In this bipolar type, current applied to the needle 130 of (+) polarity flows back to the needle 130 of (-) polarity. As a result, an energy transmission region for transmitting electric energy can be formed between the active regions 132a and 132b of the plurality of needles 130, which will be described later. Alternatively, (+) polarity may be the anode and (-) polarity may be the cathode.

The inside of the needle 130 may be hollow, and the material of the needle 130 may be made of a conductive material such as metal, silicon, etc., or a non-conductive material. When the material of the needle 130 is made of a non-conductive material, the non-conductive material may be plated with a conductive material.

A partial region of the needle 130 including the tip may be coated with an insulator, and the tip may be formed in a sharp structure. The insulator can be coated by parylene coating, teflon coating or ceramic coating. On the other hand, the following will be made for the partial regions (i.e., the first insulating region and the second insulating region) including the tip coated with the insulator in the needle 130.

In addition, the active region of the needle 130, which is not coated with an insulator, is electromagnetically energized. So that the current applied to the active region of the needle 130 of (+) polarity flows back to the active region of the needle 130 of (-) polarity. As a result, electrical energy may be transferred between the active regions of the plurality of needles 130. Such an active region will be described later.

The driving part 140 is disposed inside the housing 110, and reciprocates the needle fixing part 120 and the plurality of needles 130 inside or outside the needle magazine 170. In this case, the driving unit 140 may be driven by any one of electromagnetic force, hydraulic pressure, pneumatic pressure, and solenoid valve that moves by an electric signal.

The power supply part 150 is disposed inside the housing 110 and applies a current to the plurality of pins 130. At this time, the current applied to the plurality of needles 130 by the power supply part 150 may be a radio frequency current, and the intensity of the current applied to the plurality of needles 130 by the power supply part may be controlled by the control part.

The connector 160 may be electrically connected to an external power source, and may have wires electrically connecting the external power source with the driving part 140, the control part, and the power supply part 150.

The connection member 180 connects the connector 160 to the other side of the housing 110, and wires of the connector 160 penetrate the inside.

The needle cassette 170 may be a current application needle tip or a housing that houses the current application needle tip. The needle magazine 170 is hereinafter defined as a housing that houses the needle tip for current application.

The needle magazine 170 may have a contact surface contacting a surface of the skin to be penetrated by the plurality of needles 130, and may be detachably provided on one side of the housing 110. As described above, the plurality of needles 130 are provided in the needle magazine 170, and the plurality of needles 130 are fixed to the needle fixing portion 120 which is reciprocated inside or outside the needle magazine 170 by the driving portion 140.

The abutting surface of the needle magazine 170 may be formed as a flat surface. Therefore, the surface of the skin closely contacting the closely contacting surface of the needle magazine 170 can be in a flat state, and thus the plurality of needles 130 can intrude into the surface of the skin in a flat state, so that the plurality of needles 130 intrude into the skin all at the same depth. As a result, the electric power transmitted between the plurality of needles 130 can be transmitted to only a specific depth of the skin according to that only the specific depth of the skin is uniformly arranged between the plurality of needles 130.

The proximal surface of the needle magazine 170 may be formed with a plurality of perforations for passing the respective needles 130 therethrough. Accordingly, each needle 130 may protrude to the outside of the needle magazine 170 through a plurality of penetration holes.

The material of the contact surface of the needle box 170 may be rubber or silicone so that the contact surface can be easily brought into close contact with the skin surface. Further, the contact surface of the needle magazine 170 may be formed in a circular shape or a polygonal shape.

On the other hand, the needle magazine 170 may have a first space formed between the close contact surface of the needle magazine 170 abutting the skin surface and the needle fixing part 120, and such a first space may form a negative pressure before the plurality of needles 130 are inserted into the skin. Such a negative pressure may be formed in a case where the skin surface is closely adhered to the close adhesion surface of the needle magazine 170 by the control part or in a case where the needle fixing part 120 and the plurality of needles 130 are moved to the outside of the needle magazine 170 by the driving part 140. Further, the negative pressure may be formed by a pump (not shown) that sucks air of the first space, and the pump may be disposed inside the case 110.

In this way, when the skin surface is in close contact with the contact surface of the needle magazine 170, negative pressure is generated in the first space, and thus the skin surface is sucked into the contact surface of the needle magazine 170. As a result, the surface of the skin closely attached to the close-attaching surface of the magazine 170 can be in a flat state.

The control unit controls the drive unit 140 and the power supply unit 150.

For example, the control unit may control the distance by which the needle fixing unit 120 and the plurality of needles 130 are reciprocally moved by the driving unit 140 so that the plurality of needles 130 penetrate into the target region of the skin in a state where the surface of the skin is in close contact with the contact surface of the needle cassette 170.

In addition, in a state where the plurality of needles 130 invade the skin, the control part may operate the power supply part 150 to transmit the electric energy to the skin through the plurality of needles 130.

On the other hand, when the plurality of needles 130 penetrate the skin in a state where the surface of the skin is in close contact with the contact surface of the needle magazine 170, the surface of the skin in close contact with the contact surface of the needle magazine 170 may be deformed by the pressure applied to the surface of the skin by the plurality of needles 130. To compensate for this, it is preferable to form the lengths of the respective needles 130 fixed to the needle fixing part 120 to be different lengths.

For example, when the plurality of needles 130 invade the skin, the needle 130 disposed at the center of the needle fixing part 120 among the plurality of needles 130 may invade the skin in a state of drooping than the needle 130 disposed at the edge of the needle fixing part 120.

To compensate for this, the needle 130 disposed at the center of the needle fixing part 120 may have a length longer than the needle 130 disposed at the edge of the needle fixing part 120. That is, the needle 130 disposed at the center of the needle fixing part 120 protrudes from the needle fixing part 120 than the needle 130 disposed at the edge of the needle fixing part 120.

Fig. 5 is a plan view (bipolar type) showing a state where a needle is disposed at a needle fixing portion for a current application needle tip according to an embodiment of the present invention, fig. 6 is a schematic view showing a needle according to an embodiment of the present invention, fig. 7 is a schematic view (bipolar type) showing an energy transfer region of a current application needle tip according to an embodiment of the present invention, and fig. 8a and 8b are diagrams (bipolar type) for explaining an effect of electric energy transfer of a needle according to an embodiment of the present invention.

Referring to fig. 5, the current applying needle tip according to an embodiment of the present invention functions to transmit electric energy generated by a current (i.e., a radio frequency current) applied from an external power source to a target site of skin, and may include a needle fixing part 120 and a plurality of needles 130.

The needle fixing part 120 is the same as the needle fixing part 120 of the skin treatment device described above, and thus detailed description is omitted.

After the plurality of needles 130 invade the skin, it functions to transmit electric energy generated by current applied from an external power source to a target site of the skin. The penetration of the plurality of needles 130 into the skin can be performed by the driving unit and the control unit of the skin treatment device described above.

Such a plurality of needles 130 may be arranged and fixed on one surface of the needle fixing part 120.

For example, the plurality of needles 130 may be arranged to have at least one of more than one row and more than one column on one surface of the needle fixing part 120 to be fixed.

In addition, each row and column of the plurality of pins 130 outputs different polarities in a crossing manner with each other, and may be implemented as a Bipolar Type (Bipolar Type) in which both pins 130 of (+) polarity and pins 130 of (-) polarity are included.

Referring to fig. 5, the plurality of needles 130 may alternately output (+) polarity and (-) polarity at each row of the respective needles 130 and alternately output (+) polarity and (-) polarity at each column of the respective needles 130.

Thus, two needles 130 adjacent to each other along a row or column are composed of needles 130 of (+) polarity and needles 130 of (-) polarity.

When a current is applied to the plurality of pins 130 of such a bipolar type, the current applied to the pin 130 of (+) polarity flows back to the pin 130 of (-) polarity or the current applied to the pin 130 of (-) polarity flows back to the pin 130 of (+) polarity. As a result, electrical energy may form a lesion area at a particular depth in the skin through an energy transmission region A, C that transmits energy between later-described active regions 132a, 132b of the plurality of needles 130.

The present invention can form a lesion area at a specific depth of the skin by the energy transfer area A, C transferring electric energy between the active areas 132a, 132b of the plurality of needles 130, which will be described later.

On the other hand, at least one of at least two or more needles 130 adjacent to one needle 130 among the plurality of needles 130 may have the same polarity as the one needle 130.

Referring to fig. 6 to 7, the plurality of needles 130 may be formed at ends with first insulation regions 131a, 131b, and at the remaining portions with at least one active region 132a, 132b and at least one second insulation region 132a, 133 a.

The first insulation regions 131a, 131b are regions where the ends of the respective needles 130 are coated with an insulator.

The active regions 132a, 132b are regions where predetermined regions other than the ends of the respective needles 130 are exposed. Specifically, the active regions 132a, 132b are regions where predetermined regions other than the ends of the respective needles 130 are not coated with an insulator and are exposed. Such active regions 132a, 132b are electromagnetically energized by means of a current applied to the respective needle 130.

On the other hand, when the plurality of needles 130 of the bipolar type invade the skin and current is applied, as the current applied to the active regions 132a, 132b of the needles 130 of the (+) polarity flows back to the active regions 132a, 132b of the needles 130 of the (-) polarity, an energy transmission region A, C for transmitting electric energy is formed between the active regions 132a, 132b of the plurality of needles 130, thereby forming a lesion region D of uniform thickness at the skin site.

At this time, since the ends of the plurality of needles 130 are insulated by the first insulating regions 131a and 131b, electric power is not transmitted from the ends of the plurality of needles 130, at which the rf current is concentrated, to the skin site, and thus it is possible to prevent the skin site adjacent to the ends from having a bell-shaped damage region like that of the existing needle (i.e., a needle whose end is not coated with an insulator)

In fact, it can be confirmed with reference to fig. 8a that the bell-shaped damaged area and the burn, as in the case of the conventional needle (i.e., the needle having the end not coated with the insulator), do not occur at the skin site adjacent to the ends of the plurality of needles 130.

Furthermore, since the energy transfer regions A, C of the plurality of needles 130 occur from skin sites adjacent to the active areas 132a, 132b of the sidewalls of the plurality of needles 130, the injury region D preferentially occurs from skin sites adjacent to the sidewalls of the plurality of needles 130.

However, referring to fig. 8b, in the case of a plurality of needles of a conventional bipolar type (i.e., needles having ends not coated with an insulator), if the rf current is concentrated at the ends due to the characteristics of the rf current, a bell-shaped first lesion area 22a and burns may occur at a skin site adjacent to the ends as excessive power is transmitted from the ends to the skin site.

In addition, since the energy transmission regions of the existing plurality of needles transmitting electric energy preferentially occur at the skin site adjacent to the distal ends of the plurality of needles and then at the skin site adjacent to the sidewalls of the plurality of needles, the second lesion 22b preferentially occurs at the skin site adjacent to the sidewalls of the plurality of needles after the first lesion 22a occurs at the skin site adjacent to the distal ends of the plurality of needles.

Therefore, in the case of the conventional multiple needles, even when the second damaged region 22b is generated preferentially from the skin site adjacent to the side wall, the second damaged region 22b is generated at the skin site adjacent to the side wall after the first damaged region 22a is generated at the skin site adjacent to the tip, and thus unnecessary electric energy is supplied and the treatment time is delayed.

Referring to fig. 6 to 7, the plurality of needles 130 may include a first needle 130a and a second needle 130b, and for convenience of description, the first needle 130a and the second needle 130b are exemplified for the plurality of needles 130.

The first needle 130a may form a first insulation region 131a at an end and a plurality of active regions 132a and a plurality of second insulation regions 133a alternately along a length direction at the remaining portion. For example, the first needle 130a may alternately form a single first insulating region 131a, two or more active regions 132a, and two or more second insulating regions 133a (refer to the left side of fig. 6).

In this way, in the case where the plurality of needles 130 are constituted only by the first needles 130a, when the plurality of first needles 130a invade the skin, a plurality of energy transmission regions a spaced from each other are formed between the plurality of first needles 130a, and thus, electric energy can be supplied to a plurality of skin sites through the plurality of energy transmission regions a spaced from each other.

The second needle 130b may have a single first insulating region 131b, a single active region 132b, and a single second insulating region 133 b. That is, the second needle 130b forms a second insulating region 133b at the end, and forms a single active region 132b and a single second insulating region 133b along the length direction at the remaining portion. (refer to the right side of FIG. 6)

Referring to fig. 7, with each of the plurality of needles 130 having more than one active region 132a, 132b disposed at the same height, when the plurality of needles 130 invade the skin, the energy transmission region A, C formed between the active regions 132a, 132b of the respective needles 130 is disposed only at a specific depth of the skin. Thus, electrical energy may be provided only to a particular depth of skin by energy delivery regions A, C disposed at a particular depth of skin.

The active regions 132a, 132b of the respective needles 130 may be formed to be the same size. Specifically, the active regions 132a of the respective needles 130 may have the same length and thickness.

On the other hand, by adjusting the intensity of the current applied to the plurality of needles 130, the size (e.g., depth and width) of the energy delivery area A, C formed in the skin can be adjusted. The current intensity may be adjusted using the aforementioned power supply portion or control portion of the skin treatment device, and details thereof will be described in the following experimental examples.

Referring to the left side of fig. 7, the plurality of needles 130 are constituted by a plurality of first needles 130a having a plurality of active regions 132a spaced apart from each other, and in the case where a plurality of energy transmission regions a are formed between such a plurality of first needles 130a, when the plurality of first needles 130a invade the skin, electric energy can be supplied to a plurality of skin sites through the plurality of energy transmission regions a.

However, depending on the needs of the user, it may be desirable to transfer electrical energy between the various energy transfer regions a.

For this reason, by adjusting the intensity of the current applied to the plurality of first needles 130a to a specific numerical range, the plurality of energy transmission regions a formed between the plurality of first needles 130a can be diffused in the longitudinal direction, respectively. As a result, electric energy can be transmitted between the plurality of energy transmission regions a.

At this time, the diameter of each of the first needles 130a may be 0.23mm to 0.27mm, the length t1 of the first insulating region 131a of each of the first needles 130a may be 0.28mm to 0.32mm, the length t1 of the active region 132a of each of the first needles 130a may be 0.23mm to 0.27mm, the spaced distance (t2, i.e., the length of the second insulating region 133a located between the active regions 132a of each of the first needles 130 a) between the active regions 132a of each of the first needles 130a may be 0.28mm to 0.32mm, and the length of the second insulating region 133a located at the uppermost end of the first needle 130a is not particularly limited. Further, the interval between the plurality of first needles 130a may be 1mm to 2.4mm, but the present invention is not limited thereto.

The reason for specifying the above-mentioned numerical values will be described with reference to experimental examples.

[ Experimental example ]

Fig. 9 is a graph showing a depth from the epidermis of the skin to the coagulation zone formed by the energy transmission regions formed between the plurality of first needles according to an embodiment of the present invention, is a graph showing a length of the coagulation zone and is a graph showing a width of the coagulation zone.

After a plurality of first needles 130a, which are composed of the first insulating region 131a having the above-mentioned value and the second insulating region 133a interposed between the two active regions 132a having the above-mentioned value, were infiltrated into the skin and applied with a current, the depth from the epidermis of the skin to the coagulation region, the length of the coagulation region formed on the skin, and the width were measured by two energy transmission regions a formed between the two active regions 132a of the plurality of first needles 130a, respectively.

Wherein the intensity of the current applied to the plurality of first needles 130a is adjusted to be 20W to 60W. The current intensity is adjusted using the power supply unit or the control unit of the skin treatment apparatus described above.

As a result, when a current of 20W to 60W is applied to the plurality of first needles 130a, the depth of the epidermis to the coagulation zone (i.e., the depth at which the energy transmission region is formed at the skin) is adjusted to 0.71mm to 1.00 mm. That is, it is confirmed that the depth at which the energy transmission regions a are formed in the skin can be adjusted by adjusting the current applied to the plurality of first needles 130 a. (refer to a graph showing the depth of the skin to the coagulated region shown in FIG. 9)

Further, the width of the coagulation zone (i.e., the width at which the energy transmission region is formed at the skin) is adjusted to 0.18m to 0.48mm when a current of 20W to 60W is applied to the plurality of first needles 130 a. That is, it was confirmed that the width of the energy transmission region a formed in the skin can be adjusted by adjusting the intensity of the current applied to the plurality of first needles 130 a. (refer to the graph showing the width of the coagulated region shown in FIG. 9)

In addition, when the current intensity applied to the plurality of first needles 130a is 20W to 50W, the added maximum length of the two active regions 132a is 0.54mm (i.e., 0.27mm × 2), and the length of the coagulation region formed in the skin by the two energy transmission regions a is 0.542mm to 0.790 mm.

That is, it can be confirmed that the length of the coagulated region formed on the skin by the two energy transmission regions a is greater than the added maximum length of the two active regions 132 a. Therefore, it was confirmed that the two energy transmission regions a spread in the longitudinal direction, respectively.

However, when the intensity of the current applied to the plurality of first needles 130a is less than 20W or more than 50W, the two energy transmission regions do not spread in the length direction. Therefore, it is preferable that the intensity of the current applied to the first needle 130a is 20W to 50W. (refer to the graph showing the length of the coagulated region shown in FIG. 9)

Further, when the intensity of current applied to the plurality of first needles 130a is 42W, the minimum length of the sum of the two active regions 132a and the second insulating region 133a is 0.74mm (i.e., 0.23mm × 2+0.28mm), and the length of the coagulation region formed in the skin by the two energy transmission regions is 0.790 mm.

That is, it can be confirmed that the length of the coagulated region formed on the skin by the two energy transmission regions a is greater than the minimum length of the sum of the two active regions 132a and the second insulating region 133 a. Therefore, it was confirmed that an overlapping region B having a length of 0.05mm (0.790mm-0.74mm) as a difference between two values and partially overlapping occurred at the two energy transmission regions a. (refer to the graph showing the length of the coagulated region shown in FIGS. 7 and 9.)

The concept of such an overlap region B is shown on the left side of fig. 7.

As described above, the plurality of first needles 130a may form therebetween a plurality of energy transmission regions a spaced apart in the length direction.

At this time, when the intensity of the current applied to the plurality of first needles 130a is 42W, the plurality of energy transmission regions a formed between the plurality of first needles 130a are respectively diffused in the length direction while being more greatly diffused than a half of the length of the second insulation region 133a, thereby forming an overlapping region B partially overlapping the plurality of energy transmission regions a.

The length t5 of each of the plurality of energy transmission regions a extending in the length direction may be 0.23mm to 0.25mm, and the total length t6 of two energy transmission regions a adjacent to each other among the plurality of energy transmission regions a extending as above may be 1.25mm to 1.32 mm.

Referring to the right side of fig. 7, as an example, when the plurality of needles 130 are formed of a plurality of second needles 130b, energy transmission regions C may be formed between the active regions 132b of the plurality of second needles 130 b. When such a plurality of second needles 130b invades the skin, electric energy can be supplied to a single skin site through the energy transmission region C.

Referring to the left side of fig. 6 and the right side of fig. 7, as an example, the diameter of the second needle 130b may be 0.23mm to 0.27mm, the length t3 of the first insulation region 131b of the second needle 130b may be 0.18mm to 0.22mm, the length t4 of the active region 132b of the second needle 130b may be 0.48mm to 0.52mm, and the length of the second insulation region 133b positioned at the topmost end of the second needle 130b is not particularly limited.

Further, the interval between the second needles 130b may be 1mm to 2.4mm, but the present invention is not limited thereto.

On the other hand, when the current applied to the plurality of second needles 130b is 20W to 50W, the energy transmission regions C formed between the active regions of the plurality of second needles 130b are diffused in the length direction, and the length of diffusion of such energy transmission regions C may be 0.23 to 0.25, and the total length of the energy transmission regions C may be 0.98mm to 1.02 mm.

Accordingly, the current application needle tip according to an embodiment of the present invention can prevent the electric energy concentrated to the tip of the needle from being transmitted to the skin to generate a bell-shaped damage region by forming the insulated first insulation region at the tip of the needle.

Further, the current-applying needle tip according to an embodiment of the present invention has the active regions of each of the needles arranged at the same height with respect to the plurality of needles, respectively, so that electric energy can be supplied only to a specific depth of the skin through the energy transfer regions formed between the active regions of the respective needles.

As an example, the plurality of needles 130 are connected to one or more radio frequency sources (for example, a power supply part of the skin treatment device), the plurality of needles 130 arranged in at least one of the longitudinal and transverse directions may output the same polarity alternately or may be grouped separately, and may be implemented as a single pole type (Monopolar type) equipped with a ground electrode of the opposite polarity. For example, the plurality of needles 130 may all output with (+) polarity and the ground electrode may be implemented with (-) polarity. In addition, the plurality of needles 130 may all be output with (-) polarity, and the ground electrode is implemented with (+) polarity.

Fig. 10a and 10b are comparative diagrams (unipolar type) for explaining the power transmission effect of the needle according to an embodiment of the present invention.

For convenience of description, the unipolar needle 130 will be described with reference to the unipolar first needle 130 a. However, it is apparent that the unipolar type second needle 130b also has the functions and effects that the unipolar type first needle 130a has.

Referring to fig. 10a, when the first needle 130a of the unipolar type invades the skin and the radio frequency current is applied, the radio frequency current is concentrated to the end of the first needle 130a according to the characteristics of the radio frequency current, however, the end of the first needle 130a is insulated and the active area 132a of the sidewall is exposed, so that the radio frequency current applied to the first needle 130a flows back from the active area 132a of the sidewall of the first needle 130a to the ground electrode disposed at a non-target site (for example, outside the skin).

As a result, an energy transmission region E for transmitting electric energy from the active region 132a of the sidewall of the first needle 130a is formed in a wide range, and a wide range of skin sites can be treated by such energy transmission region E.

That is, the treatment range of the skin site by the first needle 130a is improved.

Thereafter, although the first needle 130a invades the skin and the radio frequency current is continuously applied, since the electric power is not transmitted to the skin site at the end where the radio frequency current of the first needle 130a is concentrated, it is possible to prevent the occurrence of a bell-shaped damage region and a scald at the skin site adjacent to the end of the first needle 130 a.

Furthermore, since the energy transfer area E of the first needle 130a occurs from a skin site adjacent to the active area 132a of the sidewall of the first needle 130a, a damage area preferentially occurs from the skin site adjacent to the sidewall of the first needle 130 a.

In contrast, referring to fig. 10b, when the existing single-pole type needle 30 (i.e., a needle whose distal end is not coated with an insulator) invades the skin and rf current is applied, the rf current is concentrated to the distal end of the existing needle 30 according to the characteristics of the rf current, and the distal end of the existing needle 30 is in an exposed state, so that the current applied to the existing needle 30 flows back to the ground electrode disposed at a non-target site (e.g., outside the skin) centering on the distal end of the existing needle 30.

As a result, an energy transmission region 30a for transmitting electric energy is formed in a narrow range centering on the tip of the conventional needle 30, and the skin portion in the narrow range can be treated by the energy transmission region 30.

That is, the conventional needle 30 has a limited range of treatment for the skin site.

Thereafter, if the existing needle 30 invades the skin and the radio frequency current is continuously applied, an excessive amount of electric energy is transferred from the end of the existing needle 30 where the radio frequency current is concentrated to the skin site, and thus a bell-shaped damage region and burn occur in the skin site adjacent to the end of the existing needle 30.

Further, since the energy transmission region 30a of the conventional needle 30 occurs preferentially at the skin site adjacent to the side wall of the conventional needle 30 after the skin site adjacent to the tip of the conventional needle 30 occurs, the second lesion region occurs preferentially at the skin site adjacent to the side wall after the first lesion region occurs preferentially at the skin site adjacent to the tip.

Therefore, in the conventional needle 30, even if the second damaged region is preferentially generated at the skin site adjacent to the side wall, the second damaged region is generated at the skin site adjacent to the side wall after the first damaged region is generated at the skin site adjacent to the distal end, and thus unnecessary electric power is supplied and the treatment time is delayed.

On the other hand, the plurality of needles 130 of the single pole type may be composed of first needles 130a and second needles 130b alternately arranged along columns and rows, in which case the first needles 130a are grouped into first needle 130a groups and the second needles 130b are grouped into second needle 130b groups.

For example, the needles 130 designated (+) with reference to FIG. 5 are grouped into a first group of needles 130a, and the needles 130 designated (-) are grouped into a second group of needles 130 b.

Such first set of pins 130a and second set of pins 130b may be alternately applied with rf current.

As an example, the first and second groups of needles 130a and 130b may be connected in parallel to the same rf source, and rf current may be alternately applied to the first and second groups of needles 130a and 130b by switching of the same rf source.

As another example, the first and second groups of needles 130a and 130b may be individually connected to different rf sources from each other, and rf currents may be alternately applied to the first and second groups of needles 130a and 130b by applying rf currents at different times from each other by the different rf sources from each other.

As such, if the rf current is applied to the first and second needle 130a and 130b groups at different times from each other, the proximity effect occurring at the plurality of needles 130 of a single pole type having such first and second needle 130a and 130b groups can be prevented.

The proximity effect means that the rf current applied to the plurality of needles 130 of the unipolar type flows to only a portion of the plurality of needles 130. For example, the proximity effect may mean that the rf current flows only to an edge-positioned one of the plurality of needles 130 of the unipolar type, or that the rf current flows only to a center-positioned one of the plurality of needles 130 of the unipolar type.

FIG. 11 is a schematic diagram illustrating energy transmission regions of a first needle and a second needle in accordance with an embodiment of the present invention.

As shown in fig. 11, the depth C1 of the skin required for the transmission of electric energy for the treatment of black spots may be 0.5mm or less, the depth C2 of the skin required for the transmission of electric energy for the skin color, skin texture, tightening of the skin may be 1mm or less, and the depth C3 of the skin required for the transmission of electric energy for the treatment of pores and rosacea may be 1.25mm or less.

That is, the depth of the skin required for the transmission of electric energy may vary according to the subject, and the first needle 130a and the second needle 130b of the present invention may form energy transmission regions at different skin depths from each other.

In addition, the first needle 130a may form an energy transmission area at a skin depth for treating black spots, skin tone, skin texture, tightening, pores, rosacea, and the second needle 130b may form an energy transmission area at a skin depth for treating black spots, skin tone, skin texture, tightening.

Fig. 12 is a perspective view illustrating a handpiece according to an embodiment of the present invention, fig. 13 is a sectional view illustrating a current application tip mounted on the handpiece according to an embodiment of the present invention, and fig. 14 is a sectional view illustrating a pumping effect occurring at the current application tip mounted on the handpiece according to an embodiment of the present invention.

As shown in fig. 12-14, a handpiece 500 may be included.

The handpiece 500 is a part held by a doctor, and the doctor can change a target point (for example, a part of the face) by moving the handpiece 500 while contacting it to the skin of a subject. The handpiece 500 may be connected to the skin treatment device by a cable.

The handpiece 500 may house a drive module 700 as well as a power module. Thus, the cable can electrically connect the drive module 700 and the power supply module built in the handpiece 500 to the electronic control module built in the skin treatment device, respectively. An end of the handpiece 500 may be mounted with a current application tip 600. At this time, the current-applying needle tip 600 may be accommodated in a needle magazine replaceably mounted to the end of the hand piece 500, thereby being mounted to the end of the hand piece 500.

The outer side of the handpiece 500 may be arranged with: a first conductive member 501 for electrically connecting the needle unit 620 of the current-applying needle tip 600 and the power supply module; a second conductive component 502 for switching to a cable connector 503 to electrically connect the power module with a cable. In this case, the first conductive member 501 and the second conductive member 502 may be formed in a film form. As an example, the first conductive member 501 and the second conductive member 502 may be a Flexible Printed Circuit Board (FPCB). Although described later, since the needle unit 620 of the current-applying needle tip 600 is reciprocated (driven), in order to prevent the conductive wires from colliding during the reciprocation of the needle unit 620 of the current-applying needle tip 600, the conductive wires of the needle unit 620 of the current-applying needle tip 600 and the power module and the conductive wires of the power module and the cable are disposed outside the hand piece 500.

The current application needle tip 600 may be a member that applies a high frequency to a deep part of the skin at a target site. The current-applying tip 600 may be detachably mounted to an end of the hand piece 500. The current application tip 600 may include a cylinder 610 and a needle unit 620. The cylinder 610 may be a component that is detachably mounted to the end of the handpiece 500 as a "stator". The needle unit 620 as a "mover (moving in a vertical direction)" may be a component as follows: including more than one needle 621, and can invade the deep part of the skin at a target site with a certain period (driving period of the driving module), and apply high Frequency (RF) to the dermis layer of the skin as required.

The cylinder 610 may be formed hollow in a vertical direction. The inner space of the cylinder 610 may be arranged with a needle unit 620. The lower side of the cylinder 610 may be opened, and the lower end portion of the cylinder 610 may be disposed on the surface of the skin of the target site. The open portion of the cylinder 610 may be closed by the surface of the skin at the target site.

The cylinder 610 may include a first cylinder 611 and a second cylinder 612. At this time, the first cylinder 611 may be located at the upper side, and the second cylinder 612 may be located at the lower side. The lower end of the first cylinder 611 and the upper end of the second cylinder 612 may be connected. The underside of the second cylinder 612 may be open.

The first cylinder 611 and the second cylinder 612 may have a needle unit 620 disposed inside thereof, and a connection portion of the first cylinder 611 and the second cylinder 612 may be closed by the needle unit 620.

The link 625 of the needle unit 620 may penetrate the upper surface of the first cylinder 611. The first cylinder 611 may form a first space 1 and a remaining space 1-1 due to the first plunger 623-1 of the needle unit 620. That is, the inner space of the first cylinder 611 may be closed in the vertical direction by the first plunger 623-1 of the needle unit 620, and may be divided into a first space 1 at the upper side and a remaining space 1-1 at the lower side.

In order to maintain the airtightness of the first space 1 of the first cylinder 611, a gasket 626 may be disposed between the upper face of the first cylinder 611 and the link 625 of the needle unit 620. Further, a washer 626 may be disposed between an inner circumferential surface of the first cylinder 611 and an outer circumferential surface of the first plunger 623-1 of the needle unit 620.

The lower end of the second cylinder 612 may be disposed on the surface of the skin at the target site. Thus, the lower open portion of the second cylinder 612 may be closed by the surface of the skin at the target site. The second cylinder 612 may form a second space 2 opened therebelow due to the second plunger 623-2 of the needle unit 620. The inner space of the second cylinder 612 may be closed in the vertical direction by the second plunger 623-2 of the needle unit 620, and the holder 622 of the needle unit 620 and the second plunger 623-2 of the needle unit 620 may be disposed at the upper side and the second space 2 opened at the lower side may be disposed at the lower side.

More than one groove 612-1 (refer to fig. 3) may be formed under the second cylinder 612. The one or more grooves 612-1 of the second cylinder 612 may be formed from the outer circumferential surface of the second cylinder 612 to the inner circumferential surface of the second cylinder 612. That is, more than one groove 612-1 of the second cylinder 612 may be formed through the second cylinder 612. In addition, more than one groove 612-1 of the second cylinder 612 may be arranged spaced apart from each other along the lower periphery of the second cylinder 612. That is, more than one groove 612-1 of the second cylinder 612 may be formed spaced apart from each other in the circumferential direction.

On the other hand, as described above, the lower open portion of the second space 2 may be closed by means of the surface of the skin of the target site. At this time, in order to maintain the airtightness of the second space 2, a gasket 626 may be disposed between the inner circumferential surface of the second cylinder 612 and the outer circumferential surface of the second plunger 623-2 of the needle unit 620. On the other hand, the second space 2 is selectively connected to the outside only at the lower end portion thereof by one or more grooves 612-1 of the second cylinder 612 in a state where the airtightness is maintained, so that a pumping effect described later can be improved.

More than one needle 621 of the needle unit 620 may be arranged in the second space 2. As described above, since the lower side of the second space 2 is opened, more than one needle 621 enters the surface of the skin of the target site through the opened portion of the second space 2.

A sectional area perpendicular to the vertical direction of the first cylinder 611 may be larger than a sectional area perpendicular to the vertical direction of the second cylinder 612. Accordingly, the amount of change in the volume of the first space 1 of the first cylinder 611 can be larger than the amount of change in the volume of the second space 2 of the second cylinder 612 by the reciprocation of the plunger 623 of the needle unit 620 in the vertical direction.

The cylinder 610 may additionally include a mount 613 (see fig. 11). Mount 613 may be located in second space 2. The mount 613 may be disposed to be inclined downward toward the inside from the inner circumferential surface of the second cylinder 612. The mount may be in the form of a ring and disposed along the inner circumferential surface of the second cylinder 612. In this case, the holder 613 of the present invention may be arranged along the periphery of more than one needle 621 of the needle unit 620, in the same manner as the "valve seat". That is, the mount 613 may cover the periphery of more than one needle 621 of the needle unit 620.

The outboard end of mount 613 is a fixed end and the inboard end of mount 613 may be a free end. Accordingly, the downward inclination angle of mount 613 may vary due to the flow of air around mount 613. To promote the variable effect of the tilt angle, mount 613 may be formed of an elastic material.

The outboard end of mount 613 may be disposed on the upper side than the one or more slots 612-1 of second cylinder 612. As a result, the inclination angle of mount 613 can be changed by the flow of air flowing through one or more grooves 612-1 of second cylinder 612. The mount 613 interacts with one or more grooves 612-1 of the second cylinder 612 to enhance the pumping effect described below.

The needle unit 620 may be disposed inside the cylinder 610. The needle unit 620 can be reciprocated in the vertical direction by the driving module 700. That is, the needle unit 620 may be disposed inside the first cylinder 611 and the second cylinder 612 and be capable of reciprocating as a "piston". Further, by providing the plunger 623, the internal spaces of the first cylinder 611 and the second cylinder 612 can be divided, and the volumes of the internal spaces of the first cylinder 611 and the second cylinder 612 can be changed.

The needle unit 620 may repeatedly (periodically) invade the skin of the target site by means of a back and forth movement in the vertical direction. Further, the needle unit 620 generates high frequency in the deep part of the skin at the target site, and collagen, elastic fiber, and the like damaged by the heat energy generated by the high frequency are regenerated with the lapse of time, so that the elasticity of the skin can be increased.

The needle unit 620 may include more than one needle 621, a retainer 622, a plunger 623, and a linkage 625. The needle 621 may be the aforementioned needle 130, and the holder 622 may be the aforementioned needle fixing part 120.

More than one needle 621 is reciprocally movable with the plunger 623 to alternately repeat the operations of inserting and discharging from the skin. One or more needles 621 are applied with high frequency to generate heat energy to the deep skin of the target site.

However, the present invention is not limited to this, and the one or more needles 621 may be applied with electric energy, ultrasonic waves, or the like in various wavelength bands in addition to the high frequency. Further, as described above, the electric energy, the ultrasonic wave, or the like may not be applied to the one or more needles 621.

When power of high frequency or the like is applied to one or more needles 621, the power module may be electrically connected to receive power. To this end, the one or more needles 621 may be electrically connected to the power module via the first conductive member 501.

On the other hand, the plurality of electrodes of the one or more needles 621 have two polarities, and may be a Bipolar type (Bipolar type) electrode unit in which a high frequency is generated between adjacent electrodes, or a Monopolar type (Monopolar type) electrode unit in which a plurality of electrodes have the same polarity. On the other hand, when more than one needle 621 is a single-pole type (monopolarr type), a ground electrode module (not shown) for reflowing the radio frequency generated at the more than one needle 621 may be additionally provided.

More than one needle 621 may be supported by the retainer 622. More than one needle 621 may extend downwardly from the retainer 622. More than one needle 621 may be arranged in the second space 2 of the second cylinder 612.

The one or more needles 621 may be reciprocated in the vertical direction by the driving force of the driving module 700. The lower end portion of the one or more needles 621 may be disposed deep in the skin of the target site at the bottom dead center of the needle unit 620, and the lower end portion of the one or more needles 621 may be disposed at the upper side of the skin surface of the target site at the top dead center of the needle unit 620.

Thus, more than one needle 621 may repeatedly penetrate the depth of the skin at the target site. At this time, the one or more needles 621 protrude downward through an open portion formed under the second space 2 of the second cylinder 612 and then return (return) upward. Further, the penetration depth of the one or more needles 621 may be about 2.1 mm.

The holder 622 may be a component that supports more than one needle 621. The holder 622, like the one or more needles 622, may be arranged in the second space 2 of the second cylinder 612. Further, the holder 622 may be disposed below the second plunger 623-2 and combined with the second plunger 623-2. Further, the retainer 622 may optionally be omitted, in which case more than one needle 621 may be disposed directly on the plunger 623.

The plunger 623 reciprocally moves downward and upward and forms a first space 1 and a second space 2 inside the cylinder 610. Further, the plunger 623 may be formed with a first passage 3 connecting the first space 1 and the second space 2.

Since the amount of change in the volume of the first space 1 due to the reciprocation of the plunger 623 is larger than the amount of change in the volume of the second space 2, the gas of the second space 2 can move to the first space 1 through the first passage 3 when the plunger 623 moves downward, and the gas of the first space 1 can move to the second space 2 through the first passage 3 when the plunger 623 moves upward.

Therefore, when the plunger 623 moves downward, one or more needles 621 can invade the skin and form a negative pressure state (pressure decrease) in the second space 2, and when the plunger 623 moves upward, one or more needles 621 can be discharged from the skin and form a positive pressure state (pressure increase) in the second space 2

The plungers 623 may include a first plunger 623-1 and a second plunger 623-2. The first plunger 623-1 may be disposed in the inner space of the first cylinder 611. The first plunger 623-1 may close the inner space of the first cylinder 611 in a vertical direction, thereby forming a first space 1 at an upper side and a remaining space 1-1 at a lower side at the first cylinder 611.

The first plunger 623-1 can reciprocate in the vertical direction by the driving force of the driving module 700. When the first plunger 623-1 moves downward, the volume of the first space 1 may increase and the volume of the remaining space 1-1 may decrease (refer to (1) of fig. 14). When the first plunger 623-1 moves to the upper side, the volume of the first space 1 may decrease and the volume of the remaining space 1-1 may increase (refer to (2) of fig. 14).

The second plunger 623-2 may be located in the inner space of the second cylinder 612. The second plunger 623-2 closes the inner space of the second cylinder 612 in the vertical direction, thereby forming a second space 2 in the second cylinder 612.

The second plunger 623-2 can reciprocate in the vertical direction by the driving force of the driving module 700. When the second plunger 623-2 moves downward, the volume of the second space 2 may decrease (refer to (1) of fig. 5). When the second plunger 623-2 moves to the upper side, the volume of the second space 2 may increase.

A first passage 3 connecting the first space 1 and the second space 2 may be formed at the first plunger 623-1 and the second plunger 623-2. At this time, the first passage 3 formed in the first plunger 623-1 and the second plunger 623-2 may be one or more flow paths (3-1) penetrating the first plunger 623-1 and the second plunger 623-2 in the vertical direction (formed in the first plunger and the second plunger).

The connecting rod 625 may be disposed at an upper side of the first plunger 623-1. The link 625 may be moved in a vertical direction by the driving force of the driving module 700. The link 625 is connected to the driving module 700 and the first plunger 623-1, and performs a function of transmitting the driving force of the driving module 700 to the first plunger 623-1.

The operation (pumping effect) of the current application tip 600 will be described below with reference to fig. 14. When the skin treatment apparatus of the present invention is operated, the needle unit 620 reciprocates in the vertical direction (vertical direction), and can repeatedly invade the skin at the target site (thermal energy is generated in the deep part of the skin when high frequency is applied). In addition, a drug for relieving pain due to invasion or promoting wound regeneration may be applied to the surface of the skin at the target site.

When the needle unit 620 moves downward, the volume of the first space 1 may increase and the volume of the second space 2 may decrease. At this time, the amount of change in the volume of the first space 1 may be greater than the amount of change in the volume of the second space 2 due to the difference in the sectional areas of the first space 1 and the second space 2 perpendicular to the vertical direction. That is, the volume of the first space 1 may be increased by an amount greater than the decrease in the volume of the second space 2. Further, since the first space 1 and the second space 2 are connected by the first passage 3, the gas of the second space 2 can move to the first space 1 through the first passage 3 (refer to (1) of fig. 11, move due to a pressure difference caused by a difference in the amount of change in volume). Therefore, the second space 2 is brought into a "negative pressure state (pressure is decreased; conversely, the first space is brought into a positive pressure state by an increase in pressure)" to suck the skin surface at the target site, and the skin height at the target site can be made uniform. As a result, the one or more needles 621 can be invaded at a uniform depth (the effect of the uniform depth invasion is obtained because the plurality of needles irradiate high frequency at an invasion depth (set depth) conforming to the medical design condition).

When the needle unit 620 moves to the upper side, the volume of the first space 1 may decrease and the volume of the second space 2 may increase. At this time, the amount of change in the volume of the first space 1 may be greater than the amount of change in the volume of the second space 2 due to the difference in the sectional areas of the first space 1 and the second space 2 perpendicular to the vertical direction. That is, the decrease amount of the volume of the first space 1 may be greater than the increase amount of the volume of the second space 2 of the second cylinder 612. Further, since the first space 1 and the second space 2 are connected by the first passage 3, the gas of the first space 1 can move to the second space 2 through the first passage 3 (refer to (2) of fig. 5, move due to a pressure difference caused by a difference in the amount of change in volume). As a result, the second space 2 can be in a "positive pressure state (pressure is increased; conversely, the first space is in a negative pressure state due to pressure reduction)" to deeply inject the drug applied to the surface of the skin at the target site into the inside of the invasion site (hole formed by insertion and discharge of the needle electrode) (effect of deeply injecting the drug into the skin).

Further, the first cylinder 611 may be formed with a second passage 4 connecting the remaining space 1-1 and the outside. The second passage 4 can prevent the pressure of the gas of the remaining space 1-1 from hindering the reciprocation of the first plunger 623-1 in the vertical direction. That is, when the needle unit 620 moves downward, the air of the remaining space 1-1 may be discharged to the outside to remove the resistance.

In one embodiment, the needle of the present invention may be manufactured as follows. First, a silicone gel to be generated to a thickness of an active region corresponding to a non-insulating portion is prepared, and a needle is combined into a needle magazine, and the silicone gel is inserted until a position of the active region where the needle is to be formed, and an insulating substance is injected in a state where the needle is inserted into the silicone gel, whereby a first insulating region and a second insulating region can be formed. The needle may be manufactured so that partial regions are not insulated and then finally assembled, or the needle may be manufactured and then inserted into a silicone layer to be insulated.

Specifically, when manufacturing a current-applying needle tip including the same number of active regions at specific and same positions, a needle that is not subjected to an insulation treatment is preferentially fixed in a needle magazine, and the needle is inserted into a silicone gel having a thickness corresponding to the range of the active regions. At this time, in order to simultaneously arrange a plurality of needles at a predetermined depth, a silicone pad of a certain thickness may be stretched from both sides so as not to be collapsed when inserting the needles. In addition, when a plurality of active regions are formed at the same position of each needle, a silicone pad having a thickness corresponding to the range of each active region is inserted into the plurality of needles while maintaining a distance corresponding to the distance between the active regions. Then, the plurality of needles are subjected to an insulating process in a state where the silicone gel is disposed at a position where an active region is to be formed. In this way, multiple needles can form active regions at the same location.

Among them, the following various materials can be used instead of using silica gel: the needle can be arranged at a desired position by penetrating it, and can be produced with a thickness of a range in which an active region is to be formed. For example, a soft material such as silicone rubber or rubber may be used.

The method for manufacturing the current application needle tip according to an embodiment of the present invention may include the steps of: preparing silica gel to be generated to be the thickness of an active area corresponding to the non-insulation area; coupling a plurality of needles to the needle fixing part; inserting a plurality of needles into the silicone gel up to the positions of the needles where active regions are to be formed; and injecting an insulating material to form a terminal portion and an insulating region in a state where the plurality of needles are inserted into the silicone gel.

Although the embodiments of the present invention have been described with reference to the drawings, those having ordinary skill in the art to which the present invention pertains will appreciate that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.