Needle tip for applying electric current, handpiece and skin treatment device

Abstract

The present invention relates to a needle tip for applying current, a hand piece, and a skin treatment device equipped with a needle having an active area that is electromagnetically energized as a portion of the area other than the tip of the needle is exposed in a non-insulated state.

Description

Technical Field

[0001] The present invention relates to a needle tip for applying current, a hand piece, and a skin treatment device equipped with a needle having an active area that is electromagnetically energized as a portion of the area other than the tip of the needle is exposed in a non-insulated state. Background Art

[0002] Normally, human skin functions as a primary barrier against environmental influences such as sun, cold, wind, etc. With aging, the skin loses its vibrant appearance and develops wrinkles due to environmental influences.

[0003] From the outside to the inside, the skin is composed of an epidermis with a thickness of about 100 μm, a dermis with a thickness of about 4 mm located below the epidermis, and a subcutaneous layer located below the dermis.

[0004] The dermis is composed of collagen, glycosaminoglycans, and proteoglycans, and the subcutaneous layer has elastic fibers that bridge the difference between the collagen of the dermis and the subcutaneous layer.

[0005] Among them, collagen and elastin fibers provide toughness and elasticity for the skin, but they may lose toughness and elasticity with aging and exposure to sunlight. As a result, the vitality of the skin may be reduced, and therefore many skin treatment devices for giving skin vitality are currently being developed.

[0006] This skin treatment device is a device for treating skin for the purpose of treating various scars or skin diseases, or for cosmetic purposes such as skin improvement or wrinkle improvement. It delivers a variety of energy sources to the skin, thereby inducing scars on the skin and stimulating the skin's collagen to induce collagen regeneration.

[0007] There are various types of skin treatment devices, such as a method of transmitting ultrasonic waves (HIFU type), a method of transmitting electric energy (RF type), and a method of transmitting laser light (optical type).

[0008] Among them, the skin treatment device using the method of transmitting electrical energy inserts an insulating needle or a non-insulating needle into the skin and then applies a radio frequency current. As a result, the electrical energy is transmitted to the deep part of the skin through the insulating needle or the non-insulating needle.

[0009] Figure 1 to Figure 2 This is a diagram showing a needle used in a conventional skin treatment device.

[0010] In the past, the Figure 1 Insulated needle 10 and Figure 2The non-insulated needle 30 is inserted into the epidermis 21 and dermis 22 of the skin 20 to apply electric energy (RF) to the treatment part of the skin 20. However, due to the characteristic that the electric energy is concentrated at the sharp end, the energy tends to be concentrated at the end of the needle, and the electric energy tends to be concentrated around the end of the insulated needle 10 and the non-insulated needle 30 coated with the insulator 11 on the entire part except the end 12. Therefore, there is a problem that only the part of the skin 20 where the end is located is excessively burned.

[0011] In addition, there is a problem that the insulating needle 10 can only transmit electrical energy to the skin 20 where the distal end portion 12 is located, but cannot transmit electrical energy to the skin 20 located on the side of the needle.

[0012] In addition, since all parts 31 of the non-insulated needle 30 are not coated with an insulator, electric energy can be transmitted to the side of the needle, but electric energy is transmitted to all surfaces that the needle contacts, so there is a problem of increasing total energy and causing excess energy. In addition, there is a problem that, as described above, the non-insulated needle 30 may also concentrate electric energy at the tip, which may cause unnecessary pain.

[0013] In addition, the non-insulated needle 30 cannot transmit electrical energy only to a specific depth of the skin 20 but transmits electrical energy to all parts where the needle is inserted, so there is a problem that the skin 20 corresponding to the specific target depth cannot be treated only. Summary of the invention

[0014] Technical issues

[0015] The present invention is proposed to solve the above-mentioned problems, and an object of the present invention is to provide a needle tip for applying current that can provide electrical energy only to a specific depth of the skin.

[0016] Furthermore, another object of the present invention is to provide a needle tip for applying current that can prevent excessive electric energy concentrated on the needle tip from being transmitted to the skin.

[0017] The problems that the present invention is intended to solve are not limited to the problems mentioned above, and those skilled in the art can clearly understand other problems that are not mentioned from the following description.

[0018] Technical Solution

[0019] According to one embodiment of the present invention, a needle tip for applying current includes: a needle fixing portion; and a plurality of needles, wherein a first insulating region is formed at the end and at least one active region and at least one second insulating region are formed at the remaining portion, the plurality of needles are arranged on one side of the needle fixing portion and current is applied thereto, wherein the active region is exposed and energized electromagnetically, and the first insulating region and the second insulating region may be coated with an insulator.

[0020] In addition, since the adjacent needles among the multiple needles output different or the same polarity, and the at least one active area of ​​each needle is arranged at the same height, electrical energy can be provided only to a specific depth of the skin through the energy transmission area formed between the active areas of each needle.

[0021] Furthermore, the respective active regions may be formed to have the same size.

[0022] Furthermore, by adjusting the intensity of the current applied to the plurality of needles, the size of the energy transmission area formed on the skin can be adjusted.

[0023] In addition, when the plurality of needles have a plurality of active regions spaced apart from each other, the intensity of the current applied to the plurality of needles is adjusted to 20 W to 50 W, thereby enabling the plurality of energy transmission regions formed between the plurality of active regions to be diffused.

[0024] Furthermore, among two adjacent needles among the plurality of needles, one outputs a (+) polarity and the other outputs a (-) polarity.

[0025] The handpiece according to an embodiment of the present invention may be equipped with the aforementioned needle tip for applying current.

[0026] According to one embodiment of the present invention, a skin treatment device may include: a shell, which is sucked into a target area on the skin surface; a needle box, which is installed on one side of the shell; a needle tip for applying current of the first item, which is arranged inside the needle box; a driving unit, which makes the needle tip for applying current move back and forth inside or outside the needle box; a power supply unit, which applies current to multiple needles of the needle tip for applying current; and a control unit, which controls the driving unit and the power supply unit.

[0027] Furthermore, the needle box has a first space formed between the close contact surface close to the skin and the current application needle tip, and the first space can form a negative pressure before the needle tip is inserted into the skin.

[0028] According to an embodiment of the present invention, a method for manufacturing a needle tip for applying current may include the following steps: preparing a conductive material to be formed into a thickness of an active region corresponding to a non-insulating region; combining a plurality of needles to a needle fixing portion; inserting a plurality of needles into the conductive material until the plurality of needles are inserted into the position where the active region is to be formed; and spraying an insulating material with the plurality of needles inserted into the conductive material to form a first insulating region and a second insulating region. Other specific matters of the present invention are included in the specific embodiments and drawings.

[0029] Technical Effects

[0030] Accordingly, according to an embodiment of the present invention, for a plurality of needles, the active areas of the respective needles are arranged at the same height, and thus electrical energy can be provided only to a specific depth of the skin through the energy transmission area formed between the active areas of the respective needles.

[0031] Furthermore, since the tip of the needle of the needle tip for current application according to an embodiment of the present invention is insulated, it is possible to prevent excessive electric energy concentrated at the tip of the needle from being transmitted to the skin.

[0032] The effects of the present invention are not limited to the effects mentioned above, and those skilled in the art can clearly understand other effects not mentioned through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 to Figure 2 This is a diagram showing a needle used in a conventional skin treatment device.

[0034] Figure 3 is an exploded perspective view showing a skin treatment device according to an embodiment of the present invention.

[0035] Figure 4 is a cross-sectional view showing a skin treatment device according to an embodiment of the present invention.

[0036] Figure 5 This is a plan view (bipolar type) showing a state where a needle tip for applying a current according to an embodiment of the present invention is arranged in a needle tip fixing portion.

[0037] Figure 6 is a schematic diagram showing a needle according to an embodiment of the present invention.

[0038] Figure 7 FIG. 1 is a schematic diagram of an energy transmission region of a current applying needle tip according to an embodiment of the present invention (bipolar type).

[0039] Figure 8a and Figure 8b 1 is a comparative diagram for explaining the power transmission effect of a needle according to an embodiment of the present invention (bipolar type).

[0040] Fig. 9 1 is a graph showing the depth of the coagulation zone from the epidermis of the skin formed by the plurality of first needles according to an embodiment of the present invention, a graph showing the length of the coagulation zone, and a graph showing the width of the coagulation zone.

[0041] Fig.10a and Fig.10b It is a comparative diagram for explaining the power transmission effect of the needle according to an embodiment of the present invention (monopolar type).

[0042] Fig.11is a schematic diagram showing energy transmission areas of a first needle and a second needle according to an embodiment of the present invention.

[0043] Fig.12 is a perspective view showing a hand piece according to an embodiment of the present invention.

[0044] Fig.13 1 is a cross-sectional view showing a needle tip for applying current mounted on a hand piece according to an embodiment of the present invention.

[0045] Fig.14 2 is a cross-sectional view showing a pumping effect occurring at a current applying needle tip mounted on a handpiece according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] References and Attachments Figure 1 The advantages and features of the present invention and the methods for achieving these can be clearly seen from the following detailed embodiment. However, the present invention can be implemented in a variety of different forms and is not limited to the embodiment disclosed below. This embodiment is provided only to make the disclosure of the present invention complete and to fully inform the scope of the present invention to ordinary technicians in the technical field to which the present invention belongs. The present invention is only defined by the scope of the claims.

[0047] The terms used in this specification are for illustrating an embodiment, rather than for limiting the present invention. In this specification, the singular also includes the plural, unless specifically mentioned in a sentence. The "comprises" and / or "comprising" used in the specification do not exclude the existence or addition of one or more other constituent elements other than the mentioned constituent elements. Throughout the entire specification, the same reference numerals refer to the same constituent elements, and "and / or" includes each of the mentioned constituent elements and all combinations of more than one. Although "first", "second", etc. are used to describe a variety of constituent elements, these constituent elements are obviously not limited to these terms. These terms are only used to distinguish one constituent element from another constituent element. Therefore, the first constituent element mentioned below is within the technical idea of ​​the present invention, and it is obvious that it can also be a second constituent element.

[0048] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used as the meanings commonly understood by those skilled in the art to which the present invention belongs. In addition, the terms defined in the commonly used dictionaries cannot be interpreted ideally or excessively unless specifically and clearly defined.

[0049] As shown in the figure, "below", "beneath", "lower", "above", "upper", etc., which are spatially relative terms, can be used to conveniently describe the correlation between one constituent element and another constituent element. Spatially relative terms should be understood to include different directions of the constituent elements when in use or operation in addition to the directions shown in the figure. For example, when the constituent elements shown in the figure are turned over, the constituent element described as "below" or "beneath" of another constituent element can be placed "above" of another constituent element. Therefore, "below" as an exemplary term can include both the directions of below and above. The constituent elements can also be oriented in other directions, so the spatially relative terms can be interpreted according to the orientation.

[0050] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0051] Figure 3 is an exploded perspective view showing a skin treatment device according to an embodiment of the present invention, Figure 4 is a cross-sectional view showing a skin treatment device according to an embodiment of the present invention.

[0052] like Figure 3 to Figure 4 As shown, a skin treatment device according to an embodiment of the present invention may include a housing 110, a needle tip for applying current, a driving unit 140, a power supply unit 150, a connector 160, a needle box 170, a connecting component 180, and a control unit (not shown).

[0053] The housing 110 accommodates the driving unit 140 and the power supply unit 150 . A needle box 170 is replaceably coupled to one side of the housing 110 , and the other side of the housing 110 is coupled to the connector 160 via a connecting component 180 .

[0054] The housing 110 can be separated into a left housing and a right housing. The left housing and the right housing can be detachably combined by a bolt 113, an inserting component 114, a first combining component 111, and a second combining component 112. The bolt 113 can threadably combine the left housing and the right housing, the inserting component 114 can surround the head of the bolt 113, and the first combining component 111 and the second combining component 112 can be inserted and combined at one end and the other end of the left housing 110 and the right housing 110, respectively.

[0055] The other side of the housing 110 is connected to the connection member 180 via the third connection member 115 and the fourth connection member. The third connection member 115, the fourth connection member 116, and the interior of the connection member 180 may be connected so that the wires of the connector 160 pass through.

[0056] The needle tip for current application transmits the electric energy generated by the current applied by the power supply part 150 to the target part of the skin, thereby removing damaged collagen, elastic fibers, etc. in the target part of the skin and promoting the formation of new ones. The needle tip for current application may include a needle fixing part 120 and a plurality of needles 130.

[0057] The needle fixing part 120 is arranged inside the needle box 170, and is configured to be able to move back and forth inside or outside the needle box 170 through the driving part 140, and plays a role in fixing the plurality of needles 130. Therefore, when the needle fixing part 120 moves back and forth inside or outside the needle box 170 through the driving part 140, the plurality of needles 130 can also move back and forth inside or outside the needle box 170 through the driving part 140.

[0058] As an example, on one surface of the needle fixing part 120 , the plurality of needles 130 may be arranged and fixed so as to have at least one of one or more rows and one or more columns.

[0059] Furthermore, a plurality of through holes through which the plurality of needles 130 are passed and fixed may be formed on one surface of the needle fixing portion 120 .

[0060] The plurality of needles 130 penetrate into the skin and play a role in transmitting electric energy generated by the current applied by the power supply unit 150 to a target part of the skin.

[0061] Specifically, when the close-fitting surface of the needle box 170 is in close contact with the surface of the skin, the multiple needles 130 are moved and protruded toward the outside of the needle box 170 together with the needle fixing part 120 with the help of the driving part 140, so that after penetrating into the skin, the electric energy generated by the current applied by the power supply part 150 is transmitted to the target part of the skin.

[0062] On the other hand, the multiple needles 130 that have penetrated the skin need to be quickly expelled to prevent accidents and reduce skin pain. Therefore, the control unit described later drives the drive unit 140 to expel the multiple needles 130 that have penetrated the skin quickly, thereby quickly expelling the multiple needles 130 that have penetrated the skin.

[0063] The plurality of needles 130 may be implemented in a bipolar manner including both the needles 130 of (+) polarity and the needles 130 of (-) polarity. In this bipolar type, the current applied to the needles 130 of (+) polarity flows back to the needles 130 of (-) polarity. As a result, an energy transfer region for transferring electric energy may be formed between the active regions 132a and 132b described later of the plurality of needles 130. On the other hand, the (+) polarity may be an anode, and the (-) polarity may be a cathode.

[0064] The inside of the needle 130 may be hollow, and the material of the needle 130 may be made of a conductive material or a non-conductive material such as metal, silicone, etc. When the material of the needle 130 is made of a non-conductive material, it may be formed into a structure in which a conductive material is plated on the non-conductive material.

[0065] The partial area including the end of the needle 130 may be coated with an insulator, and the end may be formed into a sharp structure. The coating of the insulator may be achieved by using polyparaxylene coating, Teflon coating or ceramic coating. On the other hand, the partial area including the end coated with the insulator in the needle 130 (i.e., the first insulating area and the second insulating area) will be described later.

[0066] In addition, the active area of ​​the needle 130 that is not coated with an insulator is energized in an electromagnetic manner. Therefore, the current applied to the active area of ​​the needle 130 with (+) polarity flows back to the active area of ​​the needle 130 with (-) polarity. As a result, electric energy can be transmitted between the active areas of the plurality of needles 130. Such an active area will be described later.

[0067] The driving unit 140 is disposed inside the housing 110 and moves the needle fixing unit 120 and the plurality of needles 130 back and forth inside or outside the needle box 170. At this time, the driving unit 140 can be driven by any one of electromagnetic force, oil pressure, air pressure, and electromagnetic valves moved by electrical signals.

[0068] The power supply unit 150 is disposed inside the housing 110 and applies current to the plurality of needles 130. At this time, the current applied by the power supply unit 150 to the plurality of needles 130 may be a radio frequency current, and the current intensity applied by the power supply unit to the plurality of needles 130 may be controlled by the control unit.

[0069] 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 unit 140 , the control unit, and the power supply unit 150 .

[0070] The connection member 180 connects the connector 160 and the other side of the housing 110 , and the electric wires of the connector 160 pass through the inside.

[0071] The needle box 170 may be a needle tip for applying current or a housing for accommodating the needle tip for applying current. The needle box 170 is defined as a housing for accommodating the needle tip for applying current.

[0072] The needle box 170 may have a close contact surface that is close to the 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 needle box 170 has a plurality of needles 130 disposed therein, and the plurality of needles 130 are fixed to the needle fixing part 120 that moves back and forth between the inner side or the outer side of the needle box 170 by the driving part 140.

[0073] The close contact surface of the needle box 170 can be formed into a plane. Therefore, the surface of the skin close to the close contact surface of the needle box 170 can be in a flat state, so the plurality of needles 130 can penetrate into the flat surface of the skin, so that the depths of penetration of the plurality of needles 130 into the skin are all the same. As a result, since only a specific depth of the skin is uniformly arranged between the plurality of needles 130, the electrical energy transmitted between the plurality of needles 130 can be transmitted only to the specific depth of the skin.

[0074] The close contact surface of the needle box 170 may be formed with a plurality of perforations for passing each needle 130. Therefore, each needle 130 may protrude to the outside of the needle box 170 through the plurality of perforations.

[0075] The material of the close contact surface of needle box 170 can be made of rubber or silicone to make the close contact surface easy to be close to the skin surface. In addition, the close contact surface of needle box 170 can be formed into a circle or a polygon.

[0076] On the other hand, the needle box 170 may have a first space formed between the close contact surface of the needle box 170 that is close to the skin surface and the needle fixing part 120, and this first space may form a negative pressure before the plurality of needles 130 are inserted into the skin. This negative pressure may be formed when the skin surface is close to the close contact surface of the needle box 170 by means of the control part or when the needle fixing part 120 and the plurality of needles 130 are moved to the outside of the needle box 170 by means of the driving part 140. In addition, the negative pressure may be formed by a pump (not shown) that sucks air into the first space, and the pump may be provided inside the housing 110.

[0077] In this way, when the surface of the skin is in close contact with the close contact surface of the needle box 170, since negative pressure is formed in the first space, the surface of the skin is sucked into the close contact surface of the needle box 170. As a result, the surface of the skin in close contact with the close contact surface of the needle box 170 can be in a flat state.

[0078] The control unit plays a role of controlling the driving unit 140 and the power supply unit 150 .

[0079] As an example, when the surface of the skin is in close contact with the contact surface of the needle box 170, the control unit can control the drive unit 140 to move the needle fixing unit 120 and the multiple needles 130 back and forth so that the multiple needles 130 invade the target part of the skin.

[0080] In addition, in a state where the plurality of needles 130 intrude into the skin, the control part may operate the power supply part 150 to transmit electric energy to the skin through the plurality of needles 130 .

[0081] On the other hand, when the skin surface is in close contact with the close contact surface of the needle box 170, when a plurality of needles 130 penetrate into the skin, the skin surface in close contact with the close contact surface of the needle box 170 may be deformed due to the pressure applied to the skin surface by the plurality of needles 130. In order to compensate for this, it is preferred that the lengths of the respective needles 130 fixed to the needle fixing portion 120 be different.

[0082] For example, when the plurality of needles 130 penetrate into the skin, the needles 130 arranged at the center of the needle fixing part 120 among the plurality of needles 130 may penetrate into the skin in a state of hanging down more than the needles 130 arranged at the edge of the needle fixing part 120 .

[0083] To compensate for this, the needle 130 disposed at the center of the needle fixing portion 120 may have a longer length than the needle 130 disposed at the edge of the needle fixing portion 120. That is, the needle 130 disposed at the center of the needle fixing portion 120 protrudes from the needle fixing portion 120 more than the needle 130 disposed at the edge of the needle fixing portion 120.

[0084] Figure 5 is a plan view (bipolar type) showing a state where a needle tip is arranged in a needle tip fixing portion for applying a current according to an embodiment of the present invention. Figure 6 is a schematic diagram showing a needle according to an embodiment of the present invention, Figure 7 is a schematic diagram of the energy transmission area of ​​the current application needle tip according to an embodiment of the present invention (bipolar type), Figure 8a and Figure 8b FIG. 1 is a diagram for explaining the power transmission effect of a needle according to an embodiment of the present invention (bipolar type).

[0085] Reference Figure 5 According to an embodiment of the present invention, the needle tip for current application plays a role in transmitting electric energy generated by current (ie, radio frequency current) applied from an external power source to a target part of the skin, and may include a needle fixing portion 120 and a plurality of needles 130.

[0086] The needle fixing part 120 is the same as the needle fixing part 120 of the skin treatment device described above, and therefore a detailed description thereof will be omitted.

[0087] After the multiple needles 130 penetrate into the skin, they play a role in transmitting the electric energy generated by the current applied from the external power source to the target part of the skin. The penetration of the multiple needles 130 into the skin can be performed by the driving unit and the control unit of the skin treatment device described above.

[0088] Such a plurality of needles 130 may be arranged and fixed on one side of the needle fixing portion 120 .

[0089] For example, the plurality of needles 130 may be arranged and fixed on one surface of the needle fixing part 120 to have at least one of one or more rows and one or more columns.

[0090] In addition, each row and column of the plurality of needles 130 outputs different polarities in a mutually crossed manner, and a bipolar type including both needles 130 of (+) polarity and needles 130 of (-) polarity may be implemented.

[0091] Reference Figure 5 , the plurality of needles 130 may alternately output (+) polarity and (−) polarity in each row of the needles 130 , and alternately output (+) polarity and (−) polarity in each column of the needles 130 .

[0092] Therefore, two needles 130 adjacent to each other along a row or a column are composed of a needle 130 of (+) polarity and a needle 130 of (−) polarity.

[0093] When current is applied to the bipolar needles 130, the current applied to the (+) polarity needles 130 flows back to the (-) polarity needles 130, or the current applied to the (-) polarity needles 130 flows back to the (+) polarity needles 130. As a result, the electric energy can be transmitted to the energy transmission areas A and C between the active areas 132a and 132b of the plurality of needles 130 to be described later to form a damaged area at a specific depth of the skin.

[0094] The present invention can form a damaged area at a specific depth of the skin through energy transmission areas A and C that transmit electrical energy between active areas 132a and 132b of a plurality of needles 130 described later.

[0095] 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 that of the one needle 130 .

[0096] Reference Figure 6 to Figure 7 The plurality of needles 130 may be formed with first insulating regions 131a, 131b at the ends, and may be formed with at least one active region 132a, 132b and at least one second insulating region 133a, 133b at the remaining portions.

[0097] The first insulating regions 131 a , 131 b are regions where the distal ends of the respective needles 130 are coated with an insulator.

[0098] The active regions 132a and 132b are regions where a predetermined region other than the tip of each needle 130 is exposed. Specifically, the active regions 132a and 132b are regions where a predetermined region other than the tip of each needle 130 is not coated with an insulator and is exposed. Such active regions 132a and 132b are energized electromagnetically by a current applied to each needle 130.

[0099] On the other hand, when multiple bipolar needles 130 invade the skin and apply current, as the current applied to the active areas 132a, 132b of the (+) polarity needles 130 flows back to the active areas 132a, 132b of the (-) polarity needles 130, energy transfer areas A, C for transmitting electrical energy are formed between the active areas 132a, 132b of the multiple needles 130, thereby forming a damaged area D with uniform thickness on the skin.

[0100] At this time, since the ends of the plurality of needles 130 are insulated by the first insulating regions 131a and 131b, electrical energy will not be transmitted from the ends of the plurality of needles 130 where the radio frequency current is concentrated to the skin part, thereby preventing the occurrence of a bell-shaped damaged area at the skin part adjacent to the ends as in the case of the existing needles (i.e., the needles whose ends are not coated with an insulator).

[0101] In fact, referring to Figure 8a It was confirmed that a bell-shaped damaged area and burns, which were the case with conventional needles (ie, needles whose tips were not coated with an insulator), did not occur in the skin area adjacent to the tips of the plurality of needles 130 .

[0102] In addition, since the energy transmission areas A and C of the multiple needles 130 start from the skin parts adjacent to the active areas 132a and 132b of the side walls of the multiple needles 130, the damage area D preferentially starts from the skin parts adjacent to the side walls of the multiple needles 130.

[0103] However, referring to Figure 8b For existing bipolar multiple needles (i.e., needles whose ends are not coated with an insulator), if the radio frequency current is concentrated on the ends due to the characteristics of the radio frequency current, excessive electrical energy will be transmitted from the ends to the skin part, thereby causing a bell-shaped first injury area 22a and burns in the skin part adjacent to the ends.

[0104] In addition, since the energy transmission area of ​​the existing multiple needles for transmitting electrical energy occurs first in the skin area adjacent to the ends of the multiple needles and then in the skin area adjacent to the side walls of the multiple needles, the first damage area 22a occurs first in the skin area adjacent to the ends of the multiple needles and then the second damage area 22b occurs in the skin area adjacent to the side walls of the multiple needles.

[0105] Therefore, for the existing multiple needles, even if you want to preferentially generate the second damaged area 22b starting from the skin area adjacent to the side wall, the second damaged area 22b will occur in the skin area adjacent to the side wall after the first damaged area 22a occurs in the skin area adjacent to the end, thereby providing unnecessary electrical energy and delaying the treatment time.

[0106] Reference Figure 6 to Figure 7 The plurality of needles 130 may include a first needle 130a and a second needle 130b. For the convenience of description, the plurality of needles 130 will be described below taking the first needle 130a and the second needle 130b as examples.

[0107] The first needle 130a may form a first insulating region 131a at the end, and alternately form a plurality of active regions 132a and a plurality of second insulating regions 133a along the 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 (see Figure 6 on the left side of the ).

[0108] In this way, in the case where the multiple needles 130 are composed only of the first needles 130a, when the multiple first needles 130a invade the skin, a plurality of energy transmission areas A separated from each other are formed between the multiple first needles 130a, so that electrical energy can be provided to multiple skin parts through the multiple energy transmission areas A separated from each other.

[0109] The second needle 130b may have a single first insulating region 131b, a single active region 132b, and a single second insulating region 133b. That is, the second needle 130b forms a first insulating region 131b 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. (See Figure 6 on the right side)

[0110] Reference Figure 7As each of the multiple needles 130 has more than one active area 132a, 132b arranged at the same height, when the multiple needles 130 penetrate the skin, the energy transmission areas A, C formed between the active areas 132a, 132b of each needle 130 are only arranged at a specific depth of the skin. Therefore, the energy transmission areas A, C arranged at a specific depth of the skin can only provide electrical energy to a specific depth of the skin.

[0111] The active areas 132a, 132b of each needle 130 may be formed to have the same size. Specifically, the active areas 132a of each needle 130 may have the same length and thickness.

[0112] On the other hand, the size (e.g., depth and width) of the energy transmission areas A and C formed on the skin can be adjusted by adjusting the current intensity applied to the multiple needles 130. The current intensity can be adjusted using the power supply unit or control unit of the aforementioned skin treatment device, and the details of this will be described in the following experimental examples.

[0113] Reference Figure 7 On the left side, the multiple needles 130 are composed of a plurality of first needles 130a having a plurality of active areas 132a separated from each other, and a plurality of energy transmission areas A are formed between the plurality of first needles 130a. When the plurality of first needles 130a invade the skin, electrical energy can be provided to a plurality of skin sites through the plurality of energy transmission areas A.

[0114] However, according to user needs, it may be necessary to transmit electrical energy between various energy transmission areas A.

[0115] Therefore, by adjusting the current intensity applied to the plurality of first needles 130a to a specific value range, the plurality of energy transmission areas A formed between the plurality of first needles 130a can be spread in the length direction. As a result, electrical energy can be transmitted between the plurality of energy transmission areas A.

[0116] At this time, the diameter of each first needle 130a may be 0.23mm to 0.27mm, the length t1 of the first insulating region 131a of each first needle 130a may be 0.28mm to 0.32mm, the length t2 of the active region 132a of each first needle 130a may be 0.23mm to 0.27mm, the spacing distance between the active regions 132a of each first needle 130a (t1′, i.e., the length of the second insulating region 133a located between the active regions 132a of each first needle 130a) may be 0.28mm to 0.32mm, and the length of the second insulating region 133a located at the top of the first needle 130a is not particularly limited. Further, the intervals between the plurality of first needles 130a may be 1mm to 2.4mm, but the present invention is not limited thereto.

[0117] The reasons for specifying the above-mentioned numerical values ​​will be described with reference to experimental examples.

[0118] [Experimental example]

[0119] Fig. 9 1 is a graph showing the depth of the coagulation zone from the epidermis of the skin formed by the energy transmission region formed between the plurality of first needles according to an embodiment of the present invention, 1 is a graph showing the length of the coagulation zone, and 1 is a graph showing the width of the coagulation zone.

[0120] After a plurality of first needles 130a consisting of a first insulating region 131a having the above-mentioned value and a second insulating region 133a sandwiched between two active regions 132a having the above-mentioned value were penetrated into the skin and current was applied, the depth from the epidermis of the skin to the coagulation zone formed through two energy transmission regions A respectively formed between the two active regions 132a of the plurality of first needles 130a, and the length and width of the coagulation zone formed in the skin were measured.

[0121] The intensity of the current applied to the plurality of first needles 130a is adjusted to 20 W to 60 W. The intensity of the current is adjusted using the power supply unit or the control unit of the aforementioned skin treatment device.

[0122] As a result, when a current of 20W to 60W was applied to the plurality of first needles 130a, the depth from the epidermis to the coagulation zone (i.e., the depth of the energy transmission zone formed in the skin) was adjusted to 0.71mm to 1.00mm. That is, it can be confirmed that the depth of the energy transmission zone A formed in the skin can be adjusted by adjusting the current applied to the plurality of first needles 130a. (See Fig. 9 Graph showing the depth of the epidermis to the coagulation zone)

[0123] In addition, when a current of 20W to 60W is applied to the plurality of first needles 130a, the width of the coagulation zone (i.e., the width of the energy transmission area formed on the skin) is adjusted to 0.18mm to 0.48mm. That is, it can be confirmed that by adjusting the current intensity applied to the plurality of first needles 130a, the width of the energy transmission area A formed on the skin can be adjusted. (See Fig. 9 Graph showing the width of the solidification zone shown)

[0124] In addition, when the current intensity applied to the multiple first needles 130a is 20W to 50W, the maximum length of the two active areas 132a added together is 0.54mm (i.e., 0.27mm×2), and the length of the coagulation zone formed on the skin through the two energy transmission areas A is 0.542mm to 0.790mm.

[0125] That is, it can be confirmed that the length of the coagulation zone formed on the skin by the two energy transmission regions A is greater than the maximum length of the two active regions 132a added together. Therefore, it can be confirmed that the two energy transmission regions A are respectively spread in the length direction.

[0126] However, when the current intensity applied to the plurality of first needles 130a is less than 20W or greater than 50W, the two energy transmission regions do not spread in the length direction. Therefore, preferably, the current intensity applied to the first needles 130a is 20W to 50W. (See Fig. 9 Graph showing the length of the solidification zone shown)

[0127] In addition, when the current intensity applied to the multiple first needles 130a is 42W, the minimum length of the two active areas 132a and the second insulating area 133a added together is 0.74mm (i.e., 0.23mm×2+0.28mm), and the length of the coagulation area formed on the skin through the two energy transmission areas is 0.790mm.

[0128] That is, it can be confirmed that the length of the coagulation zone formed on the skin by the two energy transmission areas A is greater than the minimum length of the two active areas 132a and the second insulating area 133a added together. Therefore, it can be confirmed that an overlapping area B having a length of 0.05 mm (0.790 mm-0.74 mm) as the difference between the two values ​​occurs in the two energy transmission areas A. (See Figure 7 as well as Fig. 9 Graph showing the length of the solidification zone shown)

[0129] The concept of this overlapping area B is Figure 7 The left side is shown.

[0130] As described above, a plurality of energy transmission areas A separated along the length direction may be formed between the plurality of first needles 130 a .

[0131] At this time, when the current intensity applied to the multiple first needles 130a is 42W, the multiple energy transmission areas A formed between the multiple first needles 130a spread along the length direction respectively, and at the same time spread larger than half the length of the second insulating area 133a, thereby forming an overlapping area B in which a part of the energy transmission areas A overlap.

[0132] In this way, the length t5 of the multiple energy transmission areas A diffused along the length direction can be 0.23mm to 0.25mm, and the total length t6 of two adjacent energy transmission areas A in the multiple energy transmission areas A diffused as above can be 1.25mm to 1.32mm.

[0133] Reference Figure 7 As an example, when the plurality of needles 130 is composed of a plurality of second needles 130b, an energy transmission region C can be formed between the active regions 132b of the plurality of second needles 130b. When such a plurality of second needles 130b invade the skin, electrical energy can be provided to a single skin site through the energy transmission region C.

[0134] Reference Figure 6 The left side and Figure 7 On the right side, as an example, the diameter of the second needle 130b can be 0.23mm to 0.27mm, the length t3 of the first insulating area 131b of the second needle 130b can be 0.18mm to 0.22mm, the length t4 of the active area 132b of the second needle 130b can be 0.48mm to 0.52mm, and the length of the second insulating area 133b located at the top of the second needle 130b will not be particularly limited.

[0135] Further, the intervals between the second needles 130b may be 1 mm to 2.4 mm, but the present invention is not limited thereto.

[0136] On the other hand, when the current applied to the plurality of second needles 130b is 20W to 50W, the energy transfer region C formed between the active areas of the plurality of second needles 130b diffuses along the length direction, and the length t7 of the diffusion of such energy transfer region C can be 0.23mm to 0.25mm, and the total length t8 of the energy transfer region C can be 0.98mm to 1.02mm.

[0137] Accordingly, the needle tip for applying current according to one embodiment of the present invention forms an insulating first insulating region at the end of the needle tip, thereby preventing the electric energy concentrated at the end of the needle tip from being transmitted to the skin and causing a bell-shaped damaged region.

[0138] In addition, according to an embodiment of the present invention, for a plurality of needles, the active area of ​​each needle is arranged at the same height, so that electrical energy can be provided only to a specific depth of the skin through the energy transmission area formed between the active areas of the respective needles.

[0139] As an example, the plurality of needles 130 are connected to more than one RF source (e.g., the power supply of the skin treatment device), and the plurality of needles 130 arranged in at least one of the longitudinal and transverse directions can output the same polarity alternately or in groups, and can be implemented as a monopolar type equipped with a ground electrode of opposite polarity. For example, the plurality of needles 130 can all output with (+) polarity, and the ground electrode can be implemented as (-) polarity. In addition, the plurality of needles 130 can all output with (-) polarity, and the ground electrode can be implemented as (+) polarity.

[0140] Fig.10a and Fig.10b It is a comparative diagram for explaining the power transmission effect of the needle according to an embodiment of the present invention (monopolar type).

[0141] For the sake of convenience, the monopolar needle 130 is described below with reference to the monopolar first needle 130a, but it is obvious that the monopolar second needle 130b also has the functions and effects of the monopolar first needle 130a.

[0142] Reference Fig.10a When the monopolar first needle 130a penetrates the skin and applies radio frequency current, according to the characteristics of the radio frequency current, the radio frequency current will be concentrated on the end of the first needle 130a. However, the end of the first needle 130a is insulated, and the active area 132a of the side wall is exposed. Therefore, the radio frequency current applied to the first needle 130a flows back from the active area 132a of the side wall of the first needle 130a to the ground electrode arranged at a non-target location (for example, the outside of the skin).

[0143] As a result, an energy transmission region E that transmits electrical energy from the active region 132a of the side wall of the first needle 130a is formed over a wide range, and a wide range of skin sites can be treated through this energy transmission region E.

[0144] That is, the treatment range of the first needle 130a on the skin area is improved.

[0145] Thereafter, although the first needle 130a penetrates the skin and continuously applies radio frequency current, since the end of the first needle 130a where the radio frequency current is concentrated will not transmit electrical energy to the skin site, it is possible to prevent a bell-shaped damaged area and burns from occurring in the skin site adjacent to the end of the first needle 130a.

[0146] Furthermore, since the energy transmission region E of the first needle 130a occurs from the skin portion adjacent to the active area 132a of the side wall of the first needle 130a, the damaged region preferentially occurs from the skin portion adjacent to the side wall of the first needle 130a.

[0147] On the contrary, refer to Fig.10b When the existing monopolar needle 30 (i.e., the needle whose end is not coated with an insulator) penetrates the skin and applies radio frequency current, the radio frequency current will be concentrated on the end of the existing needle 30 according to the characteristics of the radio frequency current, and the end of the existing needle 30 will be in an exposed state. Therefore, the current applied to the existing needle 30 will flow back to the ground electrode arranged at a non-target location (e.g., the outside of the skin) with the end of the existing needle 30 as the center.

[0148] As a result, an energy transmission region 30a for transmitting electric energy is formed in a narrow range with the tip of the conventional needle 30 as the center, and the skin area in a narrow range can be treated through this energy transmission region 30a.

[0149] That is, the existing needle 30 has a limited treatment range for skin areas.

[0150] Thereafter, if the existing needle 30 invades the skin and the RF current is continuously applied, excessive electric energy is transmitted from the end of the existing needle 30 where the RF current is concentrated to the skin portion, thereby causing a bell-shaped damaged area and burns in the skin portion adjacent to the end of the existing needle 30.

[0151] In addition, since the energy transmission area 30a of the existing needle 30 occurs preferentially in the skin area adjacent to the end of the existing needle 30 and then in the skin area adjacent to the side wall of the existing needle 30, the second damage area occurs preferentially in the skin area adjacent to the side wall after the first damage area occurs preferentially in the skin area adjacent to the end.

[0152] Therefore, for the existing needle 30, even if you want to preferentially cause the second damage area to occur in the skin area adjacent to the side wall, the first damage area will occur in the skin area adjacent to the end and then the second damage area will occur in the skin area adjacent to the side wall, thereby providing unnecessary electrical energy and delaying the treatment time.

[0153] On the other hand, the plurality of monopolar needles 130 may be composed of first needles 130a and second needles 130b alternately arranged in columns and rows. In this case, the first needles 130a are grouped into first needle 130a groups, and the second needles 130b are grouped into second needle 130b groups.

[0154] For example, Figure 5The needles 130 indicated by (+) as a reference are grouped into a first needle group 130a, and the needles 130 indicated by (-) are grouped into a second needle group 130b.

[0155] The first needle group 130a and the second needle group 130b may be alternately applied with radio frequency current.

[0156] As an example, the first needle group 130a and the second needle group 130b can be connected in parallel to the same RF source, and by switching the same RF source, RF current can be alternately applied to the first needle group 130a and the second needle group 130b.

[0157] As another example, the first needle group 130a and the second needle group 130b can be separately connected to different RF sources, and RF currents can be applied to the first needle group 130a and the second needle group 130b alternately by means of the different RF sources at different times.

[0158] As such, if radio frequency currents are applied to the first needle group 130a and the second needle group 130b at different times from each other, proximity effect occurring in the plurality of needles 130 of the monopolar type having such first needle group 130a and second needle group 130b can be prevented.

[0159] The proximity effect refers to that the radio frequency current applied to the plurality of monopolar needles 130 flows only to a part of the plurality of needles 130. For example, the proximity effect may refer to that the radio frequency current flows only to the needles at the edge of the plurality of monopolar needles 130, or the radio frequency current flows only to the needles at the center of the plurality of monopolar needles 130.

[0160] Fig.11 is a schematic diagram showing energy transmission areas of a first needle and a second needle according to an embodiment of the present invention.

[0161] like Fig.11 As shown, the depth C1 of the skin required for transmitting electrical energy for treating dark spots can be less than 0.5 mm, the depth C2 of the skin required for transmitting electrical energy for skin color, skin texture, and skin tightening can be less than 1 mm, and the depth C3 of the skin required for transmitting electrical energy for treating pores and rosacea can be less than 1.25 mm.

[0162] That is, the skin depth required for transmitting electrical energy may vary depending on the treatment object, and the first needle 130a and the second needle 130b of the present invention can form energy transmission areas at different skin depths.

[0163] In addition, the first needle 130a can form an energy transmission area at the skin depth for treating dark spots, skin color, skin texture, tightening, pores, and rosacea, and the second needle 130b can form an energy transmission area at the skin depth for treating dark spots, skin color, skin texture, and tightening.

[0164] Fig.12 is a perspective view showing a handpiece according to an embodiment of the present invention, Fig.13 is a cross-sectional view showing a needle tip for applying current installed on a handpiece according to an embodiment of the present invention, Fig.14 2 is a cross-sectional view showing a pumping effect occurring at a current applying needle tip mounted on a handpiece according to an embodiment of the present invention.

[0165] like Figure 12 to Figure 14 As shown, a hand piece 500 may be included.

[0166] The handpiece 500 is a part held by the doctor, and the doctor can move the handpiece 500 while contacting the handpiece 500 with the subject's skin to change the target location (for example, a part of the face). The handpiece 500 can be connected to the skin treatment device via a cable.

[0167] The handpiece 500 may have a built-in drive module 700 and a power module. Therefore, the cable may electrically connect the drive module 700 and the power module built in the handpiece 500 to the electronic control module built in the skin treatment device, respectively. A needle tip 600 for current application may be installed at the end of the handpiece 500. At this time, the needle tip 600 for current application may be accommodated in a needle box that is replaceably installed at the end of the handpiece 500, thereby being installed at the end of the handpiece 500.

[0168] The outside of the handpiece 500 may be arranged with: a first conductive component 501, which is used to electrically connect the needle unit 620 of the current application needle tip 600 and the power module; and a second conductive component 502, which is used to transfer to the cable connector 503 and electrically connect the power module to the cable. At this time, the first conductive component 501 and the second conductive component 502 can be made into a film form. As an example, the first conductive component 501 and the second conductive component 502 can be a flexible printed circuit board (FPCB, Flexible printed circuit board). Although it will be described later, since the needle unit 620 of the current application needle tip 600 will move back and forth (drive), in order to prevent the conductive wires from colliding during the reciprocating movement of the needle unit 620 of the current application needle tip 600, the conductive wires of the needle unit 620 of the current application needle tip 600 and the power module, and the conductive wires of the power module and the cable are arranged on the outside of the handpiece 500.

[0169] The needle tip 600 for applying current may be a component that applies high frequency to the deep skin of the target location. The needle tip 600 for applying current may be detachably mounted on the end of the handpiece 500. The needle tip 600 for applying current may include a cylinder 610 and a needle unit 620. The cylinder 610 may be a component that is detachably mounted on the end of the handpiece 500 as a "stator". The needle unit 620 as a "mover (moving in the vertical direction)" may be a component that includes one or more needles 621 and can penetrate into the deep skin of the target location at a certain period (the driving period of the driving module), and apply high frequency (RF, Radio Frequency) to the dermis of the skin as needed.

[0170] The cylinder 610 may be hollow in the vertical direction. The inner space of the cylinder 610 may be provided with a needle unit 620. The bottom of the cylinder 610 may be opened, and the lower end of the cylinder 610 may be arranged on the surface of the skin of the target site. Therefore, the open portion of the cylinder 610 may be closed due to the surface of the skin of the target site.

[0171] 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 lower side of the second cylinder 612 may be open.

[0172] A needle unit 620 may be disposed inside the first cylinder 611 and the second cylinder 612 , and a connection portion between the first cylinder 611 and the second cylinder 612 may be closed by the needle unit 620 .

[0173] The connecting rod 625 of the needle unit 620 may pass through the upper surface of the first cylinder 611. The first space 1 and the remaining space 1-1 may be formed in the first cylinder 611 due to the first plunger 623-1 of the needle unit 620. That is, the internal space of the first cylinder 611 may be closed in the vertical direction due to the first plunger 623-1 of the needle unit 620, and may be divided into the first space 1 located at the upper side and the remaining space 1-1 located at the lower side.

[0174] In order to maintain the airtightness of the first space 1 of the first cylinder 611, a gasket 626 may be arranged between the upper surface of the first cylinder 611 and the connecting rod 625 of the needle unit 620. In addition, a gasket 626 may be arranged between the inner circumferential surface of the first cylinder 611 and the outer circumferential surface of the first plunger 623-1 of the needle unit 620.

[0175] The lower end of the second cylinder 612 can be arranged on the surface of the skin of the target site. Therefore, the open portion below the second cylinder 612 can be closed by means of the surface of the skin of the target site. The second cylinder 612 can form a second space 2 opened below due to the second plunger 623-2 of the needle unit 620. The internal space of the second cylinder 612 can be closed in the vertical direction due to the second plunger 623-2 of the needle unit 620, and the retainer 622 of the needle unit 620 and the second plunger 623-2 of the needle unit 620 can be arranged on the upper side, and the second space 2 opened below can be arranged on the lower side.

[0176] One or more grooves 612-1 may be formed on the bottom of the second cylinder 612 (see Fig.12 ). 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, the one or more grooves 612-1 of the second cylinder 612 may be formed to penetrate the second cylinder 612. In addition, the one or more grooves 612-1 of the second cylinder 612 may be arranged to be spaced apart from each other along the outer periphery of the lower surface of the second cylinder 612. That is, the one or more grooves 612-1 of the second cylinder 612 may be formed to be spaced apart from each other in the circumferential direction.

[0177] On the other hand, as described above, the lower open portion of the second space 2 can be closed by means of the surface of the skin at the target site. At this time, in order to maintain the airtightness of the second space 2, a gasket 626 can be arranged 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 by means of one or more grooves 612-1 of the second cylinder 612 while maintaining the airtightness, thereby improving the pumping effect described later.

[0178] More than one needle 621 of the needle unit 620 may be arranged in the second space 2. As described above, since the bottom of the second space 2 is open, the more than one needle 621 enters the surface of the skin of the target site through the open part of the second space 2.

[0179] The cross-sectional area perpendicular to the vertical direction of the first cylinder 611 may be larger than the cross-sectional area perpendicular to the vertical direction of the second cylinder 612. Therefore, by virtue of the reciprocating movement of the plunger 623 of the needle unit 620 in the vertical direction, the change in volume of the first space 1 of the first cylinder 611 may be larger than the change in volume of the second space 2 of the second cylinder 612.

[0180] The cylinder 610 may additionally include a frame. The frame may be located in the second space 2. The frame may be arranged to be inclined downward from the inner circumferential surface of the second cylinder 612 toward the inner side. The frame may be in a ring shape and arranged along the inner circumferential surface of the second cylinder 612. In this case, the frame of the present invention has the same shape as the "valve seat" and may be arranged along the periphery of one or more needles 621 of the needle unit 620. That is, the frame may cover the periphery of one or more needles 621 of the needle unit 620.

[0181] The outer end of the seat frame is a fixed end, and the inner end of the seat frame can be a free end. Therefore, the downward tilt angle of the seat frame can be changed due to the flow of air around the seat frame. In order to enhance the variable effect of the tilt angle, the seat frame can be formed of an elastic material.

[0182] The outer end of the mount may be arranged on the upper side compared to the one or more grooves 612-1 of the second cylinder 612. As a result, the tilt angle of the mount may be changed by the flow of air flowing through the one or more grooves 612-1 of the second cylinder 612. The mount interacts with the one or more grooves 612-1 of the second cylinder 612 to enhance the pumping effect described later.

[0183] The needle unit 620 can be arranged inside the cylinder 610. The needle unit 620 can move back and forth in the vertical direction with the help of the driving module 700. That is, the needle unit 620 can be arranged inside the first cylinder 611 and the second cylinder 612, and can move back and forth like a "piston". Further, a plunger 623 is provided, so that the internal space of the first cylinder 611 and the second cylinder 612 can be divided, and the volume of the internal space of the first cylinder 611 and the second cylinder 612 can be changed.

[0184] The needle unit 620 can repeatedly (periodically) penetrate the skin of the target location by means of reciprocating movement in the vertical direction. Furthermore, the needle unit 620 generates high frequency in the deep part of the skin of the target location, and the collagen and elastic fibers damaged by the heat energy generated by the high frequency are regenerated over time, thereby increasing the elasticity of the skin.

[0185] The needle unit 620 may include one or more needles 621, a holder 622, a plunger 623, and a connecting rod 625. The needle 621 may be the needle 130 described above, and the holder 622 may be the needle fixing part 120 described above.

[0186] The one or more needles 621 can reciprocate together with the plunger 623, thereby alternately repeating the operation of inserting into the skin and ejecting from the skin. The one or more needles 621 are applied with high frequency, thereby generating heat energy deep in the skin of the target location.

[0187] However, the present invention is not limited thereto, and electric energy and ultrasonic waves of various wavelength bands may be applied to the one or more needles 621 in addition to high frequency. Furthermore, as described above, electric energy or ultrasonic waves may not be applied to the one or more needles 621 .

[0188] When high frequency electric energy is applied to one or more needles 621, they can be electrically connected to a power module to receive power. To this end, one or more needles 621 can be electrically connected to the power module via the first conductive component 501.

[0189] On the other hand, the multiple electrodes in the one or more needles 621 have two polarities, and can be bipolar type electrode units that generate high frequency between adjacent electrodes, or can be monopolar type electrode units in which multiple electrodes have the same polarity. On the other hand, when the one or more needles 621 are monopolar type, a ground electrode module (not shown) for reflux of the radio frequency generated in the one or more needles 621 can be additionally provided.

[0190] One or more needles 621 may be supported by the holder 622. One or more needles 621 may extend downward from the holder 622. One or more needles 621 may be arranged in the second space 2 of the second cylinder 612.

[0191] One or more needles 621 can move back and forth in the vertical direction by the driving force of the driving module 700. At the bottom dead point of the needle unit 620, the lower end of one or more needles 621 can be arranged in the deep part of the skin of the target location, and at the top dead point of the needle unit 620, the lower end of one or more needles 621 can be arranged on the upper side of the skin surface of the target location.

[0192] Therefore, one or more needles 621 can repeatedly penetrate deep into the skin of the target site. At this time, one or more needles 621 pass through the open portion formed below the second space 2 of the second cylinder 612, protrude downward, and then return (return) to the upper side. In addition, the penetration depth of one or more needles 621 can be about 2.1 mm.

[0193] The holder 622 may be a component that supports one or more needles 621. The holder 622 is the same as the one or more needles 622 and may be arranged in the second space 2 of the second cylinder 612. In addition, the holder 622 may be arranged below the second plunger 623-2 and combined with the second plunger 623-2. In addition, the holder 622 may be omitted as appropriate, and in this case, the one or more needles 621 may be directly arranged on the plunger 623.

[0194] The plunger 623 reciprocates downward and upward to form a first space 1 and a second space 2 inside the cylinder 610. In addition, the plunger 623 may be formed with a first channel 3 connecting the first space 1 and the second space 2.

[0195] Since the change in volume of the first space 1 caused by the reciprocating movement of the plunger 623 is greater than the change in volume of the second space 2, when the plunger 623 moves downward, the gas in the second space 2 can move to the first space 1 through the first channel 3, and when the plunger 623 moves upward, the gas in the first space 1 can move to the second space 2 through the first channel 3.

[0196] Therefore, when the plunger 623 moves downward, one or more needles 621 can penetrate into the skin and form a negative pressure state (pressure reduction) 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.

[0197] The plunger 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 vertically seal the inner space of the first cylinder 611, thereby forming a first space 1 located at the upper side and a remaining space 1-1 located at the lower side in the first cylinder 611.

[0198] The first plunger 623-1 can move back and forth 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 can increase, and the volume of the remaining space 1-1 can decrease (refer to Fig.14 (1)). When the first plunger 623-1 moves upward, the volume of the first space 1 may decrease, while the volume of the remaining space 1-1 may increase (refer to Fig.14 (2)).

[0199] The second plunger 623 - 2 may be located in the inner space of the second cylinder 612 . The second plunger 623 - 2 vertically closes the inner space of the second cylinder 612 , thereby forming a second space 2 in the second cylinder 612 .

[0200] The second plunger 623-2 can move back and forth 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 can be reduced (refer to Fig.14 (1)). When the second plunger 623-2 moves to the upper side, the volume of the second space 2 may increase.

[0201] The first plunger 623-1 and the second plunger 623-2 may form a first channel 3 connecting the first space 1 and the second space 2. At this time, the first channel 3 formed in the first plunger 623-1 and the second plunger 623-2 may be one or more flow paths (3-1) (formed in the first plunger and the second plunger) that penetrate the first plunger 623-1 and the second plunger 623-2 in the vertical direction.

[0202] The connecting rod 625 may be arranged on the upper side of the first plunger 623-1. The connecting rod 625 may move in the vertical direction by the driving force of the driving module 700. The connecting rod 625 is connected to the driving module 700 and the first plunger 623-1, and may perform the function of transmitting the driving force of the driving module 700 to the first plunger 623-1.

[0203] Below, refer to Fig.14 The operation (pumping effect) of the needle tip 600 for applying current is described. When the skin treatment device of the present invention is operated, the needle unit 620 moves back and forth in the vertical direction (up and down direction), and can repeatedly invade the skin of the target location (heat energy is generated deep in the skin when high frequency is applied). In addition, a drug that relieves pain caused by invasion or promotes wound regeneration can be applied to the surface of the skin at the target location.

[0204] 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, due to the difference in the cross-sectional area of ​​the first space 1 and the second space 2 perpendicular to the vertical direction, the change in the volume of the first space 1 may be greater than the change in the volume of the second space 2. That is, the increase in the volume of the first space 1 may be greater than the decrease in the volume of the second space 2. In addition, since the first space 1 and the second space 2 are connected by the first channel 3, the gas in the second space 2 can move to the first space 1 through the first channel 3 (refer to Fig.14 (1), due to the pressure difference caused by the difference in volume change). Therefore, the second space 2 becomes a "negative pressure state (pressure decreases; on the contrary, the first space becomes a positive pressure state due to pressure increase)" and sucks the surface of the skin at the target location, and the height of the skin at the target location can be made uniform. As a result, more than one needle 621 can penetrate at a uniform depth (the effect of penetrating at a uniform depth is achieved because multiple needles irradiate high frequency at the penetration depth (set depth) that meets medical design conditions).

[0205] When the needle unit 620 moves upward, the volume of the first space 1 can decrease, and the volume of the second space 2 can increase. At this time, due to the difference in the cross-sectional area of ​​the first space 1 and the second space 2 perpendicular to the vertical direction, the change in the volume of the first space 1 can be greater than the change in the volume of the second space 2. That is, the decrease in the volume of the first space 1 can be greater than the increase in the volume of the second space 2 of the second cylinder 612. In addition, since the first space 1 and the second space 2 are connected by means of the first channel 3, the gas in the first space 1 can move to the second space 2 through the first channel 3 (refer to Fig.14 (2), due to the pressure difference caused by the difference in volume change). As a result, the second space 2 can be in a "positive pressure state (pressure increases; on the contrary, the first space becomes a negative pressure state due to pressure reduction)" and the drug applied to the surface of the skin at the target location can be deeply injected into the inside of the invasion site (the hole formed by the insertion and discharge of the needle electrode) (the effect of deeply injecting the drug into the deep part of the skin).

[0206] In addition, the first cylinder 611 may be formed with a second channel 4 connecting the remaining space 1-1 and the outside. The second channel 4 may prevent the pressure of the gas in the remaining space 1-1 from hindering the reciprocating movement of the first plunger 623-1 in the vertical direction. That is, when the needle unit 620 moves downward, the air in the remaining space 1-1 may be discharged to the outside to eliminate resistance.

[0207] In one embodiment, the needle of the present invention can be manufactured as follows. First, a silicone rubber having a thickness to be formed into an active area corresponding to a non-insulating portion is prepared, and the needle is combined with a needle box and inserted into the silicone rubber until the position of the active area of ​​the needle is to be formed, and an insulating material is sprayed in the state where the needle is inserted into the silicone rubber, thereby forming a first insulating area and a second insulating area. In addition, the needle can also be manufactured so that some areas are respectively non-insulated and then finally assembled, or the needle can be inserted into the silicone rubber layer for insulation treatment after being manufactured.

[0208] Specifically, when manufacturing a needle tip for applying current including the same number of active areas at a specific and identical position, a needle that has not been insulated is preferentially fixed in a needle box, and then the needle is inserted into a silicone rubber with a thickness corresponding to the range of the active area. At this time, in order to arrange multiple needles at a predetermined depth at the same time, a silicone pad of a specific thickness can be stretched from both sides so that it will not collapse when the needle is inserted. In addition, when multiple active areas are formed at the same position of each needle, a silicone pad of a thickness corresponding to the range of each active area is maintained at a distance equivalent to the distance between the active areas. Then, the silicone is arranged in a state where the active area is to be formed, and the multiple needles are insulated. In this way, multiple needles can form active areas at the same position.

[0209] In particular, various materials can be used instead of silicone: the needle can be passed through and placed at a desired position, and can be formed in a thickness within the range where the active region is to be formed. For example, soft materials such as silicone and rubber can be used.

[0210] According to one embodiment of the present invention, a method for manufacturing a needle tip for applying current may include the following steps: preparing silicone gel having a thickness to be generated as an active area corresponding to a non-insulating area; combining a plurality of needles to a needle fixing portion; inserting the plurality of needles into the silicone gel until the plurality of needles are positioned to form an active area; and spraying insulating material with the plurality of needles inserted into the silicone gel to form a terminal portion and an insulating area.

[0211] The embodiments of the present invention are described above with reference to the accompanying drawings, but it is understood by those with ordinary knowledge in the technical field to which the present invention belongs that the present invention can be implemented in other specific forms without changing its technical ideas or essential features. Therefore, the embodiments described above should be understood to be exemplary in all aspects, rather than limiting.

Claims

1. A needle tip for applying current, characterized in that: include: Needle fixing part; as well as A plurality of needles, a first insulating region is formed at the end, at least one active region and at least one second insulating region are formed at the sidewall portion other than the end, the plurality of needles are arranged on one side of the needle fixing portion, and current is applied thereto, wherein the active region is exposed and energized electromagnetically, The first insulating region and the second insulating region are formed by coating with an insulator, The plurality of needles are equipped with a monopolar type that outputs the same polarity, The plurality of needles include a plurality of first needles and a plurality of second needles arranged alternately along columns and rows, Radio frequency current is applied alternately to the plurality of first needles and the plurality of second needles.

2. The current applying needle tip according to claim 1, characterized in that: The at least one active area of ​​each of the needles is arranged at the same height, Electrical energy is supplied only to a specific depth of the skin through the energy transmission area formed between the active areas of the respective needles.

3. The current applying needle tip according to claim 2, characterized in that: The active regions are formed to have the same size.

4. The current applying needle tip according to claim 2, characterized in that: 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.

5. The current applying needle tip according to claim 4, characterized in that: When the plurality of needles have a plurality of active areas separated from each other, The intensity of the current applied to the plurality of needles is adjusted to 20 W to 50 W, so that the plurality of energy transmission regions formed between the plurality of active regions are diffused.

6. The current applying needle tip according to claim 1, characterized in that: When current is applied to the plurality of needles, as the energy transmission area is generated from the skin area adjacent to the active area, the damaged area is preferentially generated from the skin area adjacent to the side walls of the plurality of needles.

7. A hand piece, characterized in that The current applying needle tip according to claim 1 is mounted.

8. A skin treatment device, characterized in that: include: The shell is sucked into the target area on the skin surface; A needle box, mounted on one side of the housing; The needle tip for applying current according to claim 1, arranged inside the needle box; A driving unit, which moves the current application needle tip back and forth inside or outside the needle box; a power supply unit for applying current to the plurality of needles of the current applying needle tip; as well as The control unit controls the driving unit and the power supply unit.

9. The skin treatment device according to claim 8, characterized in that The needle box has a first space formed between a close contact surface close to the skin and a needle fixing portion of the current application needle tip. The first space forms a negative pressure before the needle is inserted into the skin.

10. A method for manufacturing a needle tip for applying current, wherein the needle tip for applying current is the needle tip for applying current according to any one of claims 1 to 6, characterized in that: The steps include: preparing a conductive material to be formed into a thickness corresponding to the active region of the non-insulating region; combining a plurality of needles to the needle fixing portion; Inserting a plurality of needles into the conductive material until the plurality of needles are located at positions where active regions are to be formed; as well as The insulating material is sprayed 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.

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