Needle tip for power application

Abstract

To provide a needle tip for power application that is capable of preventing excessive electrical energy concentrated on a tip end of a needle from being transferred to skin.SOLUTION: A needle tip for power application comprises a needle fixing part, and a plurality of needles 130a, 130b each with a first insulated region 131a, 131b formed at a tip end. The power is applied to each of the needles 130a, 130b by an electricity providing part. The first insulated region 131a, 131b is coated with an insulating material.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a needle tip for applying power, a handpiece, and a skin treatment device, which are provided with a needle having an active region that is electromagnetically conductive by leaving some areas of the needle, excluding the end, exposed and uninsulated. [Background technology]

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

[0003] 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 4 mm located below the epidermis, and a subcutaneous layer located below the dermis layer.

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

[0005] Here, collagen and elastic fibers provide the skin with stiffness and elasticity, but the stiffness and elasticity may be lost due to aging and exposure to sunlight, resulting in a decrease in skin vitality, and therefore, many skin treatment devices have been developed to vitalize the skin.

[0006] Such skin treatment devices treat the skin for cosmetic purposes, such as treating various scars or skin diseases, improving the skin, or reducing wrinkles, and induce wounds in the skin by transmitting various energy sources to the skin, and stimulate collagen in the skin to induce collagen regeneration.

[0007] There are various types of skin treatment devices, such as an ultrasonic wave transmission type (HIFU type), an electric energy transmission type (RF type), and a laser light transmission type (Optical type).

[0008] Among them, the skin treatment device that transmits electrical energy applies RF power after an insulated or non-insulated needle is inserted into the skin, so that the electrical energy is transmitted deep into the skin by the insulated or non-insulated needle.

[0009] 1 and 2 are diagrams showing a needle used in a conventional skin treatment device.

[0010] Conventionally, a method has been used in which electrical (RF) energy is applied to a treatment area of ​​the skin 20 by inserting an insulated needle 10 of Fig. 1 and a non-insulated needle 30 of Fig. 2 into the epidermis 21 and dermis 22 of the skin 20. However, since electrical energy has a tendency to concentrate at the pointed end of the needle, both the insulated needle 10, whose entirety except for the distal end 12 is coated with an insulator 11, and the non-insulated needle 30 tend to concentrate electrical energy around the distal end. Therefore, there has been a problem in that excessive lacerations occur only in the area of ​​the skin 20 where the distal end is located.

[0011] Furthermore, there was a problem in that the insulated needle 10 could transmit electrical energy only to the skin 20 where the distal end 12 was located, and could not transmit electrical energy to the skin 20 located on the side of the needle.

[0012] Furthermore, since the non-insulated needle 30 is not coated with an insulator over all of its portions 31, it is possible to transmit electrical energy to the sides of the needle, but transmitting electrical energy to all of the surfaces that the needle is in contact with increases the overall energy, which can lead to the problem of excessive energy being induced. As mentioned above, the non-insulated needle 30 also has the problem of electrical energy concentrating at the distal end, which can lead to unnecessary pain.

[0013] Furthermore, there was a problem in that the non-insulated needle 30 was unable to deliver electrical energy only to a certain depth in the skin 20, and was unable to treat only the skin 20 corresponding to a specific target depth by delivering electrical energy to all sites where the needle was inserted. Summary of the Invention [Problem to be solved by the invention]

[0014] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power application needle tip that can supply electrical energy only to a specific depth of the skin.

[0015] Another object of the present invention is to provide a power application needle tip that can prevent excessive electrical energy concentrated at the tip of the needle from being transmitted to the skin.

[0016] The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0017] A needle tip for applying power according to one embodiment of the present invention includes a needle fixing part, a first insulating region formed at an end, and at least one active area and at least one second insulating area formed at a remaining portion, and includes a plurality of needles arranged on one side of the needle fixing part to which power is applied, the active area being exposed and electromagnetically conductive, and the first insulating area and the second insulating area being coated with an insulator.

[0018] In addition, the multiple needles output alternately different or the same polarity, and one or more active areas for each needle are 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 each needle.

[0019] Furthermore, each of the active regions can be formed to have the same size.

[0020] In addition, the size of the energy transfer area formed on the skin can be adjusted by adjusting the intensity of the power applied to the multiple needles.

[0021] Furthermore, when the multiple needles have multiple active regions spaced apart from each other, the intensity of the power applied to the multiple needles can be adjusted to 20W to 50W to diffuse the multiple energy transfer regions formed between the multiple active regions.

[0022] Furthermore, of the plurality of needles, one of two adjacent needles can output a (+) polarity, and the other can output a (-) polarity.

[0023] The handpiece according to an embodiment of the present invention may be equipped with the above-described power application needle tip.

[0024] A skin treatment device according to one embodiment of the present invention includes a casing that sucks in a target area on the surface of the skin, a cartridge attached to one side of the casing, a power-applying needle tip of claim 1 that is disposed inside the cartridge, a driving unit that moves the power-applying needle tip back and forth inside or outside the cartridge, an electricity providing unit that applies power to a plurality of needles of the power-applying needle tip, and a control unit that controls the driving unit and the electricity providing unit.

[0025] In addition, the cartridge has a first space formed between a contact surface that contacts the skin and a needle fixing portion of the power application needle tip, and negative pressure can be formed in the first space before the needle is inserted into the skin.

[0026] A manufacturing method for a needle tip for applying power according to one embodiment of the present invention includes the steps of providing a conductive material of a thickness to be formed as an active region corresponding to a non-insulated portion, coupling a plurality of needles to a needle fixing portion, inserting the plurality of needles into the conductive material up to the position of the plurality of needles where the active region is to be formed, and injecting an insulating material with the plurality of needles inserted into the conductive material to form a first insulating region and a second insulating region. Effect of the Invention

[0027] As a result, the power application needle tip of one embodiment of the present invention can provide electrical energy only to a specific depth of the skin through the energy transmission area formed between the active areas of each needle by arranging the active area of ​​each needle at the same height for multiple needles.

[0028] In addition, in the power application needle tip according to an embodiment of the present invention, the end of the needle is insulated, so that excessive electrical energy concentrated at the end of the needle can be prevented from being transmitted to the skin.

[0029] The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief description of the drawings]

[0030] [Figure 1] FIG. 1 shows a needle used in a conventional skin treatment device. [Diagram 2] FIG. 1 shows a needle used in a conventional skin treatment device. [Diagram 3]1 is an exploded perspective view showing a skin treatment device according to an embodiment of the present invention; [Figure 4] 1 is a cross-sectional view showing a skin treatment device according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a plan view (bipolar type) showing a state in which a needle is disposed on a needle fixing portion for a power application needle tip according to one embodiment of the present invention. [Figure 6] 1 is a schematic diagram showing a needle according to one embodiment of the present invention. [Figure 7] FIG. 2 is a schematic diagram showing the energy transfer area of ​​a power application needle tip according to one embodiment of the present invention (bipolar type). [Figure 8a] FIG. 13 is a comparative diagram (bipolar type) illustrating the electrical energy transmission effect of a needle according to an embodiment of the present invention. [Figure 8b] FIG. 13 is a comparative diagram (bipolar type) illustrating the electrical energy transmission effect of a needle according to an embodiment of the present invention. [Figure 9] 11 is a graph showing the depth from the epidermis to the coagulation zone formed in the skin by a plurality of first needles in one embodiment of the present invention, a graph showing the length of the coagulation zone, and a graph showing the width of the coagulation zone. [Figure 10a] FIG. 13 is a comparative diagram (monopolar type) illustrating the electrical energy transmission effect of a needle according to an embodiment of the present invention. [Figure 10b] FIG. 13 is a comparative diagram (monopolar type) illustrating the electrical energy transmission effect of a needle according to an embodiment of the present invention. [Figure 11] FIG. 2 is a schematic diagram showing energy transfer areas of a first needle and a second needle according to one embodiment of the present invention. [Figure 12] FIG. 1 is a perspective view showing a handpiece according to an embodiment of the present invention. [Figure 13] FIG. 2 is a cross-sectional view showing a power application needle tip attached to a handpiece according to an embodiment of the present invention. [Figure 14] 1 is a cross-sectional view showing a state in which a pumping effect occurs in a power application needle tip attached to a handpiece according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] The advantages and features of the present invention, and the method of achieving them, will become clear from the following detailed description of an embodiment in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiment disclosed below, and can be realized in various different forms. However, the embodiment is provided to complete the disclosure of the present invention and to allow those skilled in the art to fully understand the scope of the present invention, and the present invention is only defined by the scope of the claims.

[0032] The terms used in this specification are for describing one embodiment and are not intended to limit the present invention. In this specification, the singular form includes the plural form unless otherwise specified. The words "comprises" and / or "comprising" used in this specification do not exclude the presence or addition of one or more other elements other than the elements mentioned. The same reference numerals refer to the same elements throughout the specification, and "and / or" includes each and every combination of one or more of the recited elements. Even if "first", "second", etc. are used to describe various elements, it is understood that these elements are not limited by these terms. These terms are used merely to distinguish one element from another element. Therefore, it goes without saying that the first element referred to below may also be the second element within the technical spirit of the present invention.

[0033] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification are used as meanings commonly understood by ordinary skilled artisans in the technical field to which the present invention belongs. Furthermore, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly and specifically defined.

[0034] Spatially relative terms such as "below," "beneath," "lower," "above," "upper," and the like, may be used to easily describe the relationship of one component to another, as shown. Spatially relative terms should be understood to include different orientations of components in use or operation in addition to the orientation shown. For example, if the components shown are turned over, a component described as "below" or "beneath" another component may be placed "above" the other component. Thus, the exemplary term "below" can include both an orientation of below and above. Components may be oriented in other directions, and thus the spatially relative terms may be interpreted accordingly.

[0035] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0036] FIG. 3 is an exploded perspective view showing a skin treatment device according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view showing a skin treatment device according to an embodiment of the present invention.

[0037] As shown in Figures 3 and 4, a skin treatment device according to one embodiment of the present invention may include a casing 110, a needle tip for applying power, a driving unit 140, an electricity providing unit 150, a connector 160, a cartridge 170, a connecting member 180 and a control unit (not shown).

[0038] The casing 110 accommodates the driving unit 140 and the power supply unit 150. A cartridge 170 is replaceably coupled to one side of the casing 110, and a connector 160 is coupled to the other side of the casing 110 via a coupling member 180.

[0039] The casing 110 can be separated into a left casing and a right casing. The left casing and the right casing can be detachably coupled by a bolt 113, an insert member 114, a first coupling member 111 and a second coupling member 112. Here, the bolt 113 can screw the left casing and the right casing together, the insert member 114 can cover the head of the bolt 113, and the first coupling member 111 and the second coupling member 112 can fit the left casing 110 and the right casing 110 at one end and the other end, respectively.

[0040] The other side of the casing 110 may be coupled to the connecting member 180 by a third coupling member 115 and a fourth coupling member. The third coupling member 115, the fourth coupling member 116 and the inside of the connecting member 180 may be in communication with each other so that the electric wire of the connector 160 can pass through them.

[0041] The power application needle tip transmits electrical energy generated by the power applied from the electricity provider 150 to the target area of ​​the skin to remove damaged collagen, elastic fibers, etc. at the target area of ​​the skin and promote new formation, and may include a needle fixing part 120 and a plurality of needles 130.

[0042] The needle fixing part 120 is disposed inside the cartridge 170 and is installed so as to be reciprocally movable inside or outside the cartridge 170 by the driving part 140, and serves to fix the plurality of needles 130. Therefore, when the needle fixing part 120 reciprocates inside or outside the cartridge 170 by the driving part 140, the plurality of needles 130 can also reciprocate inside or outside the cartridge 170 by the driving part 140.

[0043] For example, a plurality of needles 130 may be arranged and fixed to one surface of the needle fixing portion 120 in at least one of one or more rows and one or more columns.

[0044] In addition, a number of through holes may be formed on one surface of the needle fixing part 120, through which the needles 130 may be fixed.

[0045] The needles 130 penetrate the skin and transmit the electrical energy generated by the power applied from the electricity provider 150 to a target site on the skin.

[0046] Specifically, the multiple needles 130 are moved and protruded out of the cartridge 170 together with the needle fixing unit 120 by the driving unit 140 while the surface of the skin is in contact with the contact surface of the cartridge 170, and then invade the skin, and transmit electrical energy generated by the power applied from the electricity supply unit 150 to the target area of ​​the skin.

[0047] Meanwhile, if the needles 130 that have entered the skin are not quickly removed, the risk of an accident cannot be prevented and pain on the skin cannot be reduced. Therefore, the control unit, which will be described later, drives the driving unit 140 so that the needles 130 that have entered the skin can be quickly removed.

[0048] The plurality of needles 130 may be realized in a bipolar manner including both (+) and (-) polarity needles 130. In such a bipolar type, power applied to the (+) polarity needles 130 is returned to the (-) polarity needles 130. As a result, an energy transfer region in which electrical energy is transferred between active regions 132a and 132b (described later) of the plurality of needles 130 may be formed. Meanwhile, the (+) polarity may be an anode, and the (-) polarity may be a cathode.

[0049] The needle 130 has a hollow interior, and may be made of a conductive material such as metal or silicon, or a non-conductive material. When the needle 130 is made of a non-conductive material, it may be formed in a structure in which a conductive material is plated on the non-conductive material.

[0050] The needle 130 may be formed with a structure in which a part of the needle 130 including the end is coated with an insulator and the end is pointed. The insulator may be coated by a parylene coating, a Teflon coating, or a ceramic coating. Meanwhile, the part of the needle 130 including the end coated with an insulator (i.e., a first insulating region and a second insulating region) will be described later.

[0051] Furthermore, the active areas of the needles 130 that are not coated with an insulator are electromagnetically conductive. Thus, power applied to the active areas of the needles 130 with a (+) polarity is returned to the active areas of the needles 130 with a (-) polarity. As a result, electrical energy can be transferred between the active areas of the multiple needles 130. Such active areas will be described later.

[0052] The driving unit 140 is installed inside the casing 110 and reciprocates the needle fixing unit 120 and the plurality of needles 130 inside or outside the cartridge 170. At this time, the driving unit 140 may be driven by any one of electromagnetic force, hydraulic force, pneumatic force, and a solenoid valve operated by an electric signal.

[0053] The electricity provider 150 is installed inside the casing 110 and applies power to the plurality of needles 130. At this time, the power applied from the electricity provider 150 to the plurality of needles 130 is RF power, and the intensity of the power applied from the electricity provider to the plurality of needles 130 can be controlled by the control unit.

[0054] The connector 160 can be electrically connected to an external power source and can have electric wires that electrically connect the external power source to the driving unit 140, the control unit, and the power providing unit 150.

[0055] The connecting member 180 connects the connector 160 to the other side of the casing 110, and the electric wires of the connector 160 pass through the inside of the connecting member 180.

[0056] The cartridge 170 may be a power application needle tip or a housing that houses the power application needle tip. Hereinafter, the cartridge 170 is defined as a housing that houses the power application needle tip.

[0057] The cartridge 170 may have a contact surface that contacts the surface of the skin where the multiple needles 130 are to be inserted, and may be detachably installed on one side of the casing 110 . As described above, the cartridge 170 includes a plurality of needles 130 fixed to the needle fixing part 120 that is reciprocated inside or outside the cartridge 170 by the driving part 140 .

[0058] The contact surface of the cartridge 170 may be formed as a flat surface. Therefore, the surface of the skin contacting the contact surface of the cartridge 170 may be in a flat state, and the needles 130 may invade the flat surface of the skin, so that the depth to which the needles 130 penetrate the skin is the same. As a result, the needles 130 are uniformly arranged only at a specific depth of the skin, so that the electrical energy transmitted between the needles 130 may be transmitted only to a specific depth of the skin.

[0059] A plurality of through holes for passing through each needle 130 may be formed on the contact surface of the cartridge 170. Therefore, each needle 130 may protrude to the outside of the cartridge 170 through the plurality of through holes.

[0060] The material of the contact surface of the cartridge 170 may be rubber or silicone so that it can easily contact the surface of the skin. Also, the contact surface of the cartridge 170 may be formed in a circular or polygonal shape.

[0061] Meanwhile, the cartridge 170 may have a first space formed between a contact surface of the cartridge 170 that contacts the surface of the skin and the needle fixing part 120, and a negative pressure may be generated in the first space before the plurality of needles 130 are inserted into the skin. Such a negative pressure may be generated when the surface of the skin is brought into contact with the contact surface of the cartridge 170 by the control unit, or when the needle fixing part 120 and the plurality of needles 130 are moved to the outside of the cartridge 170 by the driving unit 140. In addition, the negative pressure may be generated by a pump (not shown) that sucks air in the first space, and the pump may be installed inside the casing 110.

[0062] As a result, when the surface of the skin is brought into contact with the contact surface of the cartridge 170, a negative pressure is generated in the first space, and the surface of the skin is sucked into the contact surface of the cartridge 170. As a result, the surface of the skin in contact with the contact surface of the cartridge 170 may become flat.

[0063] The control unit serves to control the driving unit 140 and the electricity providing unit 150 .

[0064] As an example, the control unit can control the distance that the driving unit 140 moves the needle fixing unit 120 and the multiple needles 130 back and forth so that the multiple needles 130 invade the target area of ​​the skin while the surface of the skin is in contact with the contact surface of the cartridge 170.

[0065] In addition, the control unit can operate the electricity providing unit 150 so that electrical energy is transmitted to the skin by the needles 130 in a state where the needles 130 are inserted into the skin.

[0066] Meanwhile, when the needles 130 invade the skin while the surface of the skin is in contact with the contact surface of the cartridge 170, the surface of the skin may become inclined due to the pressure applied by the needles 130 to the surface of the skin. To compensate for this, it is preferable to form the lengths of the needles 130 fixed to the needle fixing part 120 to be different.

[0067] For example, when multiple needles 130 are inserted into the skin, the needle 130 positioned at the center of the needle fixing portion 120 can be inserted in a looser state than the needles 130 positioned in the frame of the needle fixing portion 120.

[0068] To compensate for this, the needle 130 arranged in the center of the needle fixation part 120 can have a greater length than the needle 130 arranged in the frame of the needle fixation part 120. That is, the needle 130 arranged in the center of the needle fixation part 120 protrudes further from the needle fixation part 120 than the needle 130 arranged in the frame of the needle fixation part 120.

[0069] Figure 5 is a plan view (bipolar type) showing the state in which a needle is placed on a needle fixing portion for a needle tip for applying electric power according to one embodiment of the present invention, Figure 6 is a schematic diagram showing a needle for one embodiment of the present invention, Figure 7 is a schematic diagram (bipolar type) showing the energy transmission area of ​​a needle tip for applying electric power according to one embodiment of the present invention, and Figures 8a and 8b are diagrams explaining the electrical energy transmission effect of a needle for one embodiment of the present invention (bipolar type).

[0070] Referring to FIG. 5, the power application needle tip according to one embodiment of the present invention serves to transmit electrical energy generated by power (i.e., RF power) applied from an external power source to a target area of ​​the skin, and may include a needle fixing part 120 and a plurality of needles 130.

[0071] The needle fixing portion 120 is the same as the needle fixing portion 120 of the above-mentioned skin treatment device, so a detailed description thereof will be omitted.

[0072] After being penetrated into the skin, the needles 130 serve to transmit electrical energy generated by power applied from an external power source to a target site on the skin. Here, the penetration of the needles 130 into the skin can be performed by the driving unit and the control unit of the above-mentioned skin treatment device.

[0073] The plurality of needles 130 may be arranged and fixed on one surface of the needle fixing part 120 .

[0074] For example, the needles 130 may be arranged and fixed to one surface of the needle fixing portion 120 in at least one of one or more rows and one or more columns.

[0075] The needles 130 output different polarities alternately for each row and column, and can be realized as a bipolar type including both needles 130 of (+) polarity and needles 130 of (-) polarity.

[0076] Referring to FIG. 5, the multiple needles 130 may alternate between (+) polarity and (-) polarity for each row of each needle 130, and may alternate between (+) polarity and (-) polarity for each column of each needle 130.

[0077] Therefore, two needles 130 adjacent to each other by a row or column are constituted by a needle 130 of (+) polarity and a needle 130 of (-) polarity.

[0078] When power is applied to such bipolar type multiple needles 130, the power applied to the needle 130 of (+) polarity is returned to the needle 130 of (-) polarity, or the power applied to the needle 130 of (-) polarity is returned to the needle 130 of (+) polarity. As a result, a damage area can be formed at a specific depth in the skin by energy transfer areas A and C where electrical energy is transferred between active areas 132a and 132b (described later) of the multiple needles 130.

[0079] The present invention can form a damaged area at a specific depth in the skin by energy transfer areas A and C, in which electrical energy is transferred between active areas 132a and 132b of a plurality of needles 130, which will be described later.

[0080] On the other hand, in the multiple needles 130 , at least one of at least two or more needles 130 adjacent to one needle 130 can have the same polarity as the one needle 130 .

[0081] 6 and 7, the needles 130 may have first insulating regions 131a, 131b formed at their ends, and at least one active region 132a, 132b and at least one second insulating region 132a, 133a formed in the remaining portions.

[0082] The first insulating regions 131a, 131b are formed by coating the ends of the needles 130 with an insulator.

[0083] The active regions 132a and 132b are formed by exposing a predetermined region of each needle 130 except for the end of the needle. Specifically, the active regions 132a and 132b are formed by exposing a predetermined region of each needle 130 except for the end of the needle without being coated with an insulator. The active regions 132a and 132b are electromagnetically energized by power applied to each needle 130.

[0084] Meanwhile, when multiple bipolar type needles 130 invade the skin and apply power, the power applied to the active areas 132a, 132b of the (+) polarity needles 130 is returned to 132a, 132b of the (-) polarity needles 130, forming energy transmission areas A and C where electrical energy is transmitted between the active areas 132a, 132b of the multiple needles 130, thereby forming a damage area D of uniform thickness at the skin site.

[0085] At this time, the ends of the multiple needles 130 are insulated by the first insulating regions 131a, 131b, and electrical energy is not transmitted from the ends of the multiple needles 130 where the RF power is concentrated to the skin site, thereby preventing the occurrence of a bell-shaped damage area in the skin site adjacent to the ends as occurs with conventional needles (i.e., needles whose ends are not coated with an insulator).

[0086] Indeed, referring to FIG. 8a, it can be seen that the skin area adjacent to the ends of the multiple needles 130 does not develop bell-shaped damage areas and lacerations as occurs with conventional needles (i.e., needles whose ends are not coated with insulation).

[0087] In addition, the energy transfer areas A, C of the multiple needles 130 are generated from the skin area adjacent to the active areas 132a, 132b of the side walls of the multiple needles 130, so that the damage area D is preferentially generated from the skin area adjacent to the side walls of the multiple needles 130.

[0088] On the other hand, referring to FIG. 8b, in the case of conventional bipolar type multiple needles (i.e., needles whose ends are not coated with an insulator), when RF power is concentrated at the ends due to the characteristics of RF power, excessive electrical energy is transmitted from the ends to the skin area, causing a bell-shaped first damage area 22a and lacerations in the skin area adjacent to the ends.

[0089] In addition, the energy transmission area to which the electrical energy of conventional multiple needles is transmitted occurs preferentially in the skin area adjacent to the ends of the multiple needles, and then occurs in the skin area adjacent to the side walls of the multiple needles, so that a first damage area 22a occurs preferentially in the skin area adjacent to the ends of the multiple needles, and then a second damage area 22b occurs in the skin area adjacent to the side walls of the multiple needles.

[0090] Therefore, even when conventional multiple needles are used to preferentially generate a second damage area 22b from the skin area adjacent to the side wall, the first damage area 22a is generated from the skin area adjacent to the end, and then the second damage area 22b is generated in the skin area adjacent to the side wall, resulting in the provision of unnecessary electrical energy and delaying treatment time.

[0091] 6 and 7, the plurality of needles 130 may include a first needle 130a and a second needle 130b, and for convenience of explanation, the plurality of needles 130 will be described below using the first needle 130a and the second needle 130b as examples.

[0092] The first needle 130a may have a first insulating region 131a formed at an end thereof, and a plurality of active regions 132a and a plurality of second insulating regions 133a formed alternately along the length of the remaining portion. For example, the first needle 130a may have a single first insulating region 131a, two or more active regions 132a, and two or more second insulating regions 133a formed alternately (see the left side of FIG. 6).

[0093] As a result, when the multiple needles 130 are composed only of first needles 130a, multiple energy transmission areas A spaced apart from one another are formed between the multiple first needles 130a when the multiple first needles 130a invade the skin, and electrical energy can be provided to multiple skin sites via the multiple energy transmission areas A spaced apart from one another in this manner.

[0094] 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 may have a second insulating region 133b formed at an end, and a single active region 132b and a single second insulating region 133b formed along the length of the remaining portion (see the right side of FIG. 6).

[0095] 7, the multiple needles 130 have one or more active areas 132a, 132b arranged at the same height for each needle 130, so that energy transfer areas A, C formed between the active areas 132a, 132b of each needle 130 when the multiple needles 130 invade the skin are arranged only at a specific depth of the skin. Therefore, electrical energy can be provided only to a specific depth of the skin through the energy transfer areas A, C arranged at the specific depth of the skin.

[0096] 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.

[0097] Meanwhile, the size (e.g., depth and width) of the energy transfer areas A and C formed on the skin can be adjusted by adjusting the intensity of the power applied to the multiple needles 130. Here, the adjustment of the power intensity can be performed using the electricity provider and controller of the skin treatment device described above, and details of this will be described in the following experimental examples.

[0098] Referring to the left side of Figure 7, when the multiple needles 130 are composed of multiple first needles 130a having multiple active areas 132a spaced apart from each other, and multiple energy transmission areas A are formed between such multiple first needles 130a, electrical energy can be provided to multiple skin sites through the multiple energy transmission areas A when the multiple first needles 130a invade the skin.

[0099] However, depending on the needs of the user, it may be necessary to transmit electrical energy between the energy transmission areas A.

[0100] To this end, by adjusting the intensity of the power applied to the first needles 130a within a specific range, the energy transfer areas A formed between the first needles 130a can be diffused in the longitudinal direction, so that the electrical energy can be transferred between the energy transfer areas A.

[0101] In this case, the diameter of each first needle 130a is 0.23 mm to 0.27 mm, the length t1 of the first insulating region 131a of each first needle 130a is 0.28 mm to 0.32 mm, the length t1 of the active region 132a of each first needle 130a is 0.23 mm to 0.27 mm, the separation distance between the active regions 132a of each first needle 130a (t2, i.e., the length of the second insulating region 133a located between the active regions 132a of each first needle 130a) is 0.28 mm to 0.32 mm, and the length of the second insulating region 133a located at the uppermost end of the first needle 130a is not particularly limited. Furthermore, the interval between the multiple first needles 130a is 1 mm to 2.4 mm, but the present invention is not limited thereto.

[0102] The reasons for the above numerical values ​​will be explained with reference to experimental examples. EXAMPLES

[0103] FIG. 9 is a graph showing the depth from the epidermis to the coagulation zone formed in the skin by the energy transfer area formed between multiple first needles in one embodiment of the present invention, a graph showing the length of the coagulation zone, and a graph showing the width of the coagulation zone.

[0104] A plurality of first needles 130a composed of a first insulating region 131a having the above-mentioned numerical values ​​and a second insulating region 133a interposed between two active regions 132a having the above-mentioned numerical values ​​were inserted into the skin to apply power, and then the depth from the epidermis to the coagulation zone formed in the skin by the two energy transfer regions A 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.

[0105] Here, the intensity of the power applied to the plurality of first needles 130a was adjusted to 20 W to 60 W. The adjustment of the power intensity was performed using the electricity supply unit and the control unit of the above-mentioned skin treatment device.

[0106] As a result, when 20W to 60W of power was applied to the multiple first needles 130a, the depth from the epidermis to the coagulation zone (i.e., the depth at which the energy transfer area is formed in the skin) was adjusted to 0.71 to 1.00 mm. In other words, it was confirmed that the depth at which the energy transfer area A is formed in the skin can be adjusted by adjusting the intensity of the power applied to the multiple first needles 130a. (See the graph showing the depth from the epidermis to the coagulation zone in FIG. 9.)

[0107] In addition, when 20W to 60W of power was applied to the multiple first needles 130a, the width of the coagulation zone (i.e., the width where the energy transfer area is formed on the skin) was adjusted to 0.18mm to 0.48mm. In other words, it was confirmed that the width where the energy transfer area A is formed on the skin can be adjusted by adjusting the intensity of the power applied to the multiple first needles 130a. (See the graph showing the width of the coagulation zone in Figure 9.)

[0108] Furthermore, when the intensity of the power applied to the multiple first needles 130a was 20W to 50W, the maximum combined length of the two active areas 132a was 0.54mm (i.e., 0.27mm x 2), and the length of the coagulation zone formed on the skin by the two energy transmission areas A was 0.542mm to 0.790mm.

[0109] That is, it was confirmed that the length of the coagulation zone formed on the skin by the two energy-transmission regions A was greater than the maximum length of the two active regions 132a combined. Therefore, it was confirmed that the two energy-transmission regions A each expanded in the longitudinal direction.

[0110] However, when the intensity of the power applied to the multiple needles 130a was less than 20 W or more than 50 W, the two energy transfer regions did not expand in the longitudinal direction. Therefore, it is preferable that the intensity of the power applied to the first needle 130a is 20 W to 50 W. (See the graph showing the length of the coagulation zone shown in FIG. 9.)

[0111] Furthermore, when the power intensity applied to the multiple first needles 130a was 42 W, the minimum length of the two active areas 132a and the second insulating area 133a combined was 0.74 mm (i.e., 0.23 mm x 2 + 0.28 mm), and the length of the coagulation zone formed on the skin by the two energy transfer areas A was 0.790 mm.

[0112] That is, it was confirmed that the length of the coagulation zone formed on the skin by the two energy transfer areas A was greater than the minimum length of the two active areas 132a and the second insulating area 133a combined. Therefore, it was confirmed that the two energy transfer areas A had a length of 0.05 mm (0.790 mm-0.74 mm), which is the difference between the two values, and an overlapping area B was generated where the two energy transfer areas A partially overlapped (see graphs showing the length of the coagulation zone in Figures 7 and 9).

[0113] The concept of such overlap region B is as shown on the left side of FIG.

[0114] As described above, a plurality of energy transfer regions A spaced apart in the longitudinal direction may be formed between the first needles 130a.

[0115] In this case, when the intensity of the power applied to the multiple first needles 130a is 42 W, the multiple energy transfer regions A formed between the multiple first needles 130a each expand along the longitudinal direction and expand to greater than half the length of the second insulating region 133a, thereby forming overlapping regions B in which the multiple energy transfer regions A partially overlap.

[0116] The length t5 of each of the multiple energy transfer regions A in the longitudinal direction is 0.23 mm to 0.25 mm, and the total length t6 of two adjacent energy transfer regions A among the multiple energy transfer regions A thus spread may be 1.25 mm to 1.32 mm.

[0117] 7, for example, when the plurality of needles 130 is composed of a plurality of second needles 130b, an energy transfer area C may be formed between the active areas 132b of the plurality of second needles 130b. When the plurality of second needles 130b invade the skin, electrical energy may be provided to a single skin site via the energy transfer area C.

[0118] 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 is 0.23 mm to 0.27 mm, the length t3 of the first insulating region 131b of the second needle 130b is 0.18 mm to 0.22 mm, the length t4 of the active region 132b of the second needle 130b is 0.48 mm to 0.52 mm, and the length of the second insulating region 133b located at the uppermost end of the second needle 130b is not particularly limited.

[0119] Furthermore, the distance between the second needles 130b is 1 mm to 2.4 mm, but the present invention is not limited to this.

[0120] On the other hand, when the intensity of the power applied to the multiple second needles 130b is 20W to 50W, the energy transmission region C formed between the active regions 132b of the multiple second needles 130b expands in the longitudinal direction, the length of the energy transmission region C is 0.23 to 0.25, and the total length of the energy transmission region C may be 0.98mm to 1.02mm.

[0121] As a result, the power application needle tip according to one embodiment of the present invention has a first insulating region formed at the end of the needle, thereby preventing electrical energy concentrated at the end of the needle from being transmitted to the skin and causing a bell-shaped damage region.

[0122] In addition, the power application needle tip according to one embodiment of the present invention can provide electrical energy only to a specific depth of the skin through the energy transmission area formed between the active areas of each needle by arranging the active area of ​​each needle at the same height for multiple needles.

[0123] As an example, the multiple needles 130 are connected to one or more RF sources (e.g., an electrical supply unit of a skin treatment device), and the multiple needles 130 arranged in at least one of the vertical and horizontal directions may be individually or grouped to alternately output the same polarity, and may be realized as a monopolar type in which a ground electrode of the opposite polarity is provided. For example, the multiple needles 130 may all be output with a (+) polarity, and the ground electrode may be realized with a (-) polarity. Also, the multiple needles 130 may all be output with a (-) polarity, and the ground electrode may be realized with a (+) polarity.

[0124] 10a and 10b are comparative diagrams (monopolar type) illustrating the electrical energy transmission effect of a needle according to one embodiment of the present invention.

[0125] For the sake of convenience, the monopolar needle 130 will be described below with reference to the monopolar first needle 130a. However, it goes without saying that the functions and effects of the monopolar first needle 130a are also possessed by the monopolar second needle 130b.

[0126] Referring to FIG. 10a, when a monopolar type first needle 130a invades the skin and RF power is applied, due to the characteristics of the RF power, the RF power is concentrated at the end of the first needle 130a. However, since the end of the first needle 130a is insulated and the active area 132a on the side wall is exposed, the RF power applied to the first needle 130a is returned from the active area 132a on the side wall of the first needle 130a to a ground electrode positioned at a non-target point (e.g., outside the skin).

[0127] As a result, an energy transfer area E, to which electrical energy is transferred from the active area 132a on the sidewall of the first needle 130a, is formed over a wide range, and such energy transfer area E allows treatment of a wide range of skin sites.

[0128] That is, the first needle 130a improves treatment coverage of the skin site.

[0129] Thereafter, even if the first needle 130a continues to invade the skin and the application of RF power, electrical energy is not transmitted to the skin site from the end of the first needle 130a where the RF power is concentrated, thereby preventing the occurrence of a bell-shaped damaged area and lacerations in the skin site adjacent to the end of the first needle 130a.

[0130] In addition, the energy transfer region E of the first needle 130a occurs from the skin area adjacent to the active region 132a of the sidewall of the first needle 130a, so that the damage region occurs preferentially from the skin area adjacent to the sidewall of the first needle 130a.

[0131] On the other hand, referring to FIG. 10b, when a monopolar type conventional needle (30, i.e., a needle whose end is not coated with an insulator) invades the skin and RF power is applied, due to the characteristics of the RF power, the RF power is concentrated at the end of the conventional needle 30. However, since the end of the conventional needle 30 is exposed, the power applied to the conventional needle 30 is returned to a ground electrode placed at a non-target point (e.g., outside the skin) centered on the end of the conventional needle 30.

[0132] As a result, an energy transfer area 30a, through which electrical energy is transferred, is formed over a narrow range around the tip of the conventional needle 30, and such energy transfer area 30a allows treatment of a narrow range of skin site.

[0133] That is, the conventional needle 30 is limited in the extent to which it can treat a skin site.

[0134] Thereafter, as the penetration of the skin by the conventional needle 30 and application of RF power continues, excessive electrical energy is transferred to the skin site from the end of the conventional needle 30 where the RF power is concentrated, causing a bell-shaped damaged area and lacerations in the skin site adjacent to the end of the conventional needle 30.

[0135] In addition, the energy transmission area 30a of the conventional needle 30 occurs preferentially in the skin area adjacent to the end of the conventional needle 30, and then occurs later in the skin area adjacent to the side wall of the conventional needle 30, such that a first damage area occurs preferentially in the skin area adjacent to the end, and then a second damage area occurs later in the skin area adjacent to the side wall.

[0136] Therefore, even when the conventional needle 30 is intended to preferentially generate a second damage area from the skin area adjacent to the side wall, after the first damage area is generated from the skin area adjacent to the end, the second damage area is generated in the skin area adjacent to the side wall, resulting in the supply of unnecessary electrical energy and delaying the treatment time.

[0137] On the other hand, the monopolar type multiple needles 130 may consist of first needles 130a and second needles 130b arranged alternately along columns and rows, in which case the first needles 130a may be grouped into a first needle 130a group and the second needles 130b may be grouped into a second needle 130b group.

[0138] For example, with reference to FIG. 5, the needles 130 marked with (+) are grouped in the first needle 130a group, and the needles 130 marked with (-) are grouped in the second needle 130b group.

[0139] RF power may be applied alternately to the first group of needles 130a and the second group of needles 130b.

[0140] As an example, the first group of needles 130a and the second group of needles 130b can be connected in parallel to the same RF source, and RF power can be applied alternately to the first group of needles 130a and the second group of needles 130b by switching the same RF source.

[0141] As another example, the first group of needles 130a and the second group of needles 130b can be individually connected to different RF sources, and RF power can be applied alternately to the first group of needles 130a and the second group of needles 130b by the different RF sources applying RF power at different times.

[0142] In this manner, when RF power is applied to the first group of needles 130a and the second group of needles 130b at different times, the proximity effect occurring in the monopolar type multiple needles 130 having such a first group of needles 130a and a second group of needles 130b can be prevented.

[0143] Here, the proximity effect refers to RF power applied to the monopolar type needles 130 flowing only to some of the monopolar type needles 130. For example, the proximity effect causes RF power to flow only to those of the monopolar type needles 130 located at the edges, or to those of the monopolar type needles 130 located in the center.

[0144] FIG. 11 is a schematic diagram showing energy transfer areas of a first needle and a second needle according to one embodiment of the present invention.

[0145] As shown in FIG. 11, the skin depth C1 where electrical energy needs to be delivered to treat blemishes can be 0.5 mm or less, the skin depth C2 where electrical energy needs to be delivered to treat skin tone, skin texture, and skin titanning can be 1 mm or less, and the skin depth C3 where electrical energy needs to be delivered to treat pores and rosacea can be 1.25 mm or less.

[0146] That is, since the skin depth to which electrical energy needs to be delivered may vary depending on the treatment target, the first needle 130a and the second needle 130b of the present invention can form energy delivery regions at different skin depths.

[0147] In addition, the first needle 130a can form an energy transfer area at a depth of the skin for treating age spots, skin tone, skin texture, titaning, pores, and rosacea, and the second needle 130b can form an energy transfer area at a depth of the skin for treating age spots, skin tone, skin texture, and titaning.

[0148] FIG. 12 is a perspective view of a handpiece according to one embodiment of the present invention, FIG. 13 is a cross-sectional view of a power application needle tip attached to a handpiece according to one embodiment of the present invention, and FIG. 14 is a cross-sectional view of a state in which a pumping effect is generated in the power application needle tip attached to a handpiece according to an embodiment of the present invention.

[0149] As shown in FIGS. 12-14, a handpiece 500 can be included.

[0150] The handpiece 500 is a part that is held by the physician, and the physician can move the handpiece 500 while it is in contact with the subject's skin to change the target location (for example, a part of the face). The handpiece 500 can be connected to a skin treatment device via a cable.

[0151] The handpiece 500 may include a drive module 700 and a power supply module. Thus, the cable may electrically connect each of the drive module 700 and the power supply module included in the handpiece 500 to an electronic control module included in the skin treatment device. A power application tip 600 may be attached to an end of the handpiece 500. In this case, the power application needle tip 600 may be replaceably attached to the end of the handpiece 500 in the form of a cartridge.

[0152] A first conductive member 501 for electrically connecting the needle unit 620 of the power application needle tip 600 to the power module and a second conductive member 502 for electrically connecting the power module and the cable by being docked to the cable connector 503 may be disposed on the outside of the handpiece 500. In this case, the first conductive member 501 and the second conductive member 502 may be manufactured in a film shape. As an example, the first conductive member 501 and the second conductive member 502 may be a flexible printed circuit board (FPCB). As described below, since the needle unit 620 of the power application needle tip 600 moves back and forth (drives), the conductive lines of the needle unit 620 of the power application needle tip 600 and the power module and the conductive lines of the power module and the cable are provided on the outside of the handpiece 500 so that the conductive lines do not come into contact during the reciprocating movement of the needle unit 620 of the power application needle tip 600.

[0153] The power application needle tip 600 may be a member that applies high frequency to the deep part of the skin at the target location. The power application needle tip 600 may be detachably attached to the end of the hand piece 500. The power application needle tip 600 may include a cylinder 610 and a needle unit 620. The cylinder 610 is a "stator" and may be a member that is detachably attached to the end of the hand piece 500. The needle unit 620 is a "movable element (moves vertically)" that includes one or more needles 621 and can invade the deep part of the skin at the target location at a constant period (driving period of the driving module), and may be a member that applies high frequency (RF, Radio Frequency) to the dermis layer of the skin as necessary.

[0154] The cylinder 610 may have a vertical hole. A needle unit 620 may be disposed in the internal space of the cylinder 610. The lower surface of the cylinder 610 may be open, and the lower end of the cylinder 610 may be disposed on the surface of the skin at the target location. Thus, the open portion of the cylinder 610 may be closed by the surface of the skin at the target location.

[0155] The cylinder 610 may include a first cylinder 611 and a second cylinder 612 . In this case, the first cylinder 611 may be located on the upper side, and the second cylinder 612 may be located on the lower side. The lower end of the first cylinder 611 may be connected to the upper end of the second cylinder 612. The lower surface of the second cylinder 612 may be open.

[0156] A needle unit 620 may be disposed inside the first cylinder 611 and the second cylinder 612 , and the connecting portion between the first cylinder 611 and the second cylinder 612 may be closed by the needle unit 620 .

[0157] A connecting rod 625 of the needle unit 620 may penetrate through an upper surface of the first cylinder 611. A first space 1 and a surplus space 1-1 may be formed in the first cylinder 611 by the first plunger 623-1 of the needle unit 620. That is, the internal space of the first cylinder 611 may be closed vertically by the first plunger 623-1 of the needle unit 620, and may be divided into a first space 1 located on the upper side and a surplus space 1-1 located on the lower side.

[0158] In order to maintain airtightness of the first space 1 of the first cylinder 611, a gasket 626 may be disposed between an upper surface of the first cylinder 611 and a connecting rod 625 of the needle unit 620. In addition, a gasket 626 may be disposed between an inner peripheral surface of the first cylinder 611 and an outer peripheral surface of the first plunger 623-1 of the needle unit 620.

[0159] The lower end of the second cylinder 612 may be disposed on the surface of the skin at the target location. Thus, the open portion of the lower surface of the second cylinder 612 may be closed by the surface of the skin at the target location. The second cylinder 612 may have a second space 2 with an open lower surface formed therein by the second plunger 623-2 of the needle unit 620. The internal space of the second cylinder 612 may be vertically closed by the second plunger 623-2 of the needle unit 620, the holder 622 of the needle unit 620 and the second plunger 623-2 of the needle unit 620 may be disposed on the upper side, and the second space 2 with an open lower surface may be located on the lower side.

[0160] One or more grooves 612-1 may be formed on the lower surface of the second cylinder 612 (see FIG. 3). 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 penetrating the second cylinder 612. Also, the one or more grooves 612-1 of the second cylinder 612 may be arranged spaced apart from each other along the 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 spaced apart from each other in the circumferential direction.

[0161] Meanwhile, as described above, the open portion of the lower surface of the second space 2 can be closed by the surface of the skin at the target location. In this case, in order to maintain airtightness of the second space 2, a gasket 626 can be disposed between the inner peripheral surface of the second cylinder 612 and the outer peripheral surface of the second plunger 623-2 of the needle unit 620. Meanwhile, while maintaining airtightness of the second space 2, only the lower end portion is selectively connected to the outside through one or more grooves 612-1 of the second cylinder 612, thereby improving the pumping effect described below.

[0162] One or more needles 621 of the needle unit 620 may be disposed in the second space 2. As described above, the lower surface of the second space 2 is open, so that the one or more needles 621 can pass through the open portion of the second space 2 and enter the surface of the skin at the target location.

[0163] 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, the amount of change in the volume of the first space 1 of the first cylinder 611 may be larger than the amount of change in the volume of the second space 2 of the second cylinder 612 due to the vertical reciprocating movement of the plunger 623 of the needle unit 620.

[0164] The cylinder 610 may further include a seat 613 (see FIG. 11 ). The seat 613 may be located in the second space 2. The seat 613 may be arranged so as to incline downwardly from the inner circumferential surface of the second cylinder 612 toward the inside. The seat 613 may be ring-shaped and arranged along the inner circumferential surface of the second cylinder 612. In this case, the seat 613 of the present invention may be arranged along the periphery of one or more needles 621 of the needle unit 620, similar to the shape of a “valve seat”. That is, the seat 613 may cover the periphery of one or more needles 621 of the needle unit 620.

[0165] An outer end of the sheet 613 may be a fixed end, and an inner end of the sheet 613 may be a free end. Therefore, the angle of the downward inclination of the sheet 613 may be variable depending on the air flow around the sheet 613. To improve the variable effect of the inclination angle, the sheet 613 may be made of an elastic material.

[0166] An outer end of the sheet 613 may be disposed above one or more grooves 612-1 of the second cylinder 612. As a result, the inclination angle of the sheet 613 may be varied by the flow of air flowing through one or more grooves 612-1 of the second cylinder 612. The sheet 613 may interact with one or more grooves 612-1 of the second cylinder 612 to enhance the pumping effect described below.

[0167] The needle unit 620 may be disposed inside the cylinder 610. The needle unit 620 may 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 may reciprocate like a "piston." Furthermore, the needle unit 620 may be provided with a plunger 623 to partition the internal spaces of the first cylinder 611 and the second cylinder 612, and the volumes of the internal spaces of the first cylinder 611 and the second cylinder 612 may be changed.

[0168] The needle unit 620 can repeatedly (periodically) invade the skin at the target location by vertical reciprocating movement. Furthermore, the needle unit 620 generates high frequency waves deep in the skin at the target location, and collagen and elastic fibers damaged by thermal energy from the high frequency waves are regenerated over time, thereby increasing the firmness of the skin.

[0169] 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 above-mentioned needle 130, and the holder 622 may be the above-mentioned needle fixing portion 120.

[0170] One or more needles 621 can be alternately inserted and ejected from the skin by reciprocating with the plunger 623. Radio frequency can be applied to the one or more needles 621 to generate thermal energy deep in the skin at the target location.

[0171] However, without being limited thereto, electric energy, ultrasonic waves, etc. of various wavelength bands other than high frequency waves may be applied to one or more needles 621. Furthermore, as described above, it is also possible that electric energy, ultrasonic waves, etc. are not applied to one or more needles 621.

[0172] When electrical energy such as high frequency is applied to one or more needles 621, the needles 621 can be electrically connected to a power supply module to receive power. To this end, the needles 621 can be electrically connected to the power supply module via the first conductive member 501 described above.

[0173] Meanwhile, the one or more needles 621 may be a bipolar type electrode unit in which multiple electrodes have two polarities and high frequency is generated between adjacent electrodes, or a monopolar type electrode unit in which multiple electrodes all have the same polarity. Meanwhile, when the one or more needles 621 are of the monopolar type, a ground electrode module (not shown) for returning the high frequency generated by the one or more needles 621 may be additionally provided.

[0174] The one or more needles 621 can be supported by a holder 622. The one or more needles 621 can extend downward from the holder 622. The one or more needles 621 can be disposed in the second space 2 of the second cylinder 612.

[0175] The one or more needles 621 can be reciprocated in the vertical direction by the driving force of the driving module 700. At the bottom dead center of the needle unit 620, the lower end of the one or more needles 621 can be positioned deep in the skin of the target point, and at the top dead center of the needle unit 620, the lower end of the one or more needles 621 can be positioned above the skin surface of the target point.

[0176] Therefore, the one or more needles 621 can repeatedly invade deep into the skin at the target location. In this case, the one or more needles 621 can pass through an opening formed on the lower surface of the second space 2 of the second cylinder 612, protrude downward, and then return (return) to the upper side. Meanwhile, the invasion depth of the one or more needles 621 can be approximately 2.1 mm.

[0177] The holder 622 may be a member that supports one or more needles 621. The holder 622 may be disposed in the second space 2 of the second cylinder 612, as well as the one or more needles 621. The holder 622 may be disposed on the lower surface of the second plunger 623-2 and may be coupled to the second plunger 623-2. Furthermore, the holder 622 may be omitted in some cases, in which case the one or more needles 621 may be disposed directly on the plunger 623.

[0178] The plunger 623 can reciprocate upward and downward to form a first space 1 and a second space 2 inside the cylinder 610. In addition, the plunger 623 can be formed with a first channel 3 connecting the first space 1 and the second space 2.

[0179] Since the amount of change in volume of the first space 1 due to the reciprocating movement of the plunger 623 is greater than the amount of change in volume of the second space 2, when the plunger 623 moves downward, gas in the second space 2 can move to the first space 1 via the first channel 3, and when the plunger 623 moves upward, gas in the first space 1 can move to the second space 2 via the first channel 3.

[0180] Therefore, when the plunger 623 moves downward, one or more needles 621 invade the skin, and a negative pressure state can be created in the second space 2 (a decrease in pressure), and when the plunger 623 moves upward, one or more needles 621 are expelled from the skin, and a positive pressure state can be created in the second space 2 (an increase in pressure).

[0181] 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 internal space of the first cylinder 611. The first plunger 623-1 may close the internal space of the first cylinder 611 in the vertical direction to form a first space 1 located in the upper side and a surplus space 1-1 located in the lower side of the first cylinder 611.

[0182] The first plunger 623-1 can reciprocate vertically 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 surplus space 1-1 can decrease (see 1 in FIG. 14). When the first plunger 623-1 moves upward, the volume of the first space 1 can decrease and the volume of the surplus space 3 can increase (see 2 in FIG. 14).

[0183] The second plunger 623-2 may be located in the internal space of the second cylinder 612. The second plunger 623-2 may close the internal space of the second cylinder 612 in the vertical direction to form a second space 2 in the second cylinder 612.

[0184] The second plunger 623-2 can reciprocate vertically 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 decrease (see 1 in FIG. 5). When the second plunger 623-2 moves upward, the volume of the second space 2 can increase.

[0185] The first plunger 623-1 and the second plunger 623-2 may be formed with a first channel 3 connecting the first space 1 and the second space 2. In this case, 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 that vertically penetrate the first plunger 623-1 and the second plunger 623-2 (formed in the first plunger and the second plunger).

[0186] The connecting rod 625 may be disposed above the first plunger 623-1. The connecting rod 625 may be moved vertically 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 function to transmit the driving force of the driving module 700 to the first plunger 623-1.

[0187] Hereinafter, the operation (pumping effect) of the power application needle tip 600 will be described with reference to Fig. 14. When the skin treatment device of the present invention is operated, the needle unit 620 reciprocates vertically (up and down) and can repeatedly invade the skin at the target location (when high frequency is applied, heat energy is generated deep in the skin). Meanwhile, a drug can be applied to the surface of the skin at the target location to relieve pain caused by the invasion or promote wound regeneration.

[0188] 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. In this case, due to the difference in the cross-sectional areas of the first space 1 and the second space 2 in 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. Meanwhile, 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 (see 1 in FIG. 11, movement due to the pressure difference due to the difference in the change in volume). Therefore, the second space 2 is in a "negative pressure state (pressure decrease; conversely, the first space is in a positive pressure state due to an increase in pressure)" and the surface of the skin at the target point can be sucked in, and the height of the skin on the surface of the target point can be made uniform. As a result, one or more needles 621 can penetrate to a uniform depth (effect of penetrating to a uniform depth, because each of the multiple needles irradiates high frequency at a penetration depth (already set depth) that meets the medical design conditions).

[0189] When the needle unit 620 moves upward, the volume of the first space 1 may decrease, and the volume of the second space 2 may increase. In this case, due to the difference in the cross-sectional areas of the first space 1 and the second space 2 in 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 decrease in the volume of the first space 1 may be greater than the increase in the volume of the second space 2 of the second cylinder 612. Meanwhile, since the first space 1 and the second space 2 are connected by the first channel 3, the gas in the first space 1 can move to the second space 2 through the first channel 3 (see 2 in FIG. 5, movement due to the pressure difference due to the difference in the change in volume). As a result, the second space 2 is in a "positive pressure state (increased pressure; conversely, the first space is in a negative pressure state due to a decreased pressure)" and the drug applied to the surface of the skin at the target point can be deeply injected into the inside of the invasive site (the hole formed by the insertion and ejection of the needle electrode) (the effect of injecting the drug deep into the deep part of the skin).

[0190] Meanwhile, the first cylinder 611 may be formed with a second channel 4 connecting the surplus space 1-1 with the outside. The second channel 4 may prevent the gas pressure in the surplus space 1-1 from interfering with the vertical reciprocating movement of the first plunger 623-1. That is, when the needle unit 620 moves downward, the air in the surplus space 1-1 may be discharged to the outside to remove resistance.

[0191] In one embodiment, the needle of the present invention can be manufactured as follows. First, silicon having a thickness to be formed as an active region corresponding to a non-insulated portion is provided, the needle is coupled to a cartridge, and inserted into the silicon up to a position where the active region of the needle is to be formed, and an insulating material is sprayed while the needle is inserted into the silicon to form a first insulating region and a second insulating region. Alternatively, the needle can be manufactured so that some regions are not insulated and then finally assembled, or the needle can be manufactured and then inserted into a silicon layer for insulation treatment.

[0192] Specifically, when manufacturing a power application needle tip including the same number of active areas at the same specific position, a needle that has not been subjected to insulation treatment is first fixed to a cartridge, and the needle is inserted into silicon having a thickness corresponding to the range of the active area. At this time, the silicon pad having a specific thickness can be pulled from both sides so that the needle does not loosen when the needle is inserted, so that the multiple needles can be positioned at a certain depth at the same time. Also, when multiple active areas are formed at the same position of each needle, multiple needles are inserted while maintaining the silicon pad having a thickness corresponding to the range of each active area by the distance between the active areas. Then, insulation treatment is performed on the multiple needles while the silicon is positioned at the position where the active area is to be formed. This allows the multiple needles to form active areas at the same position.

[0193] Here, silicon can be used in place of various materials that can be formed to a desired thickness range through which needles can penetrate and be placed at a desired position to form an active region, for example, any soft material such as silicon or rubber can be used.

[0194] A manufacturing method for a needle tip for applying power in one embodiment of the present invention may include the steps of providing silicon of a thickness to be formed as an active region corresponding to a non-insulated portion, coupling a plurality of needles to a needle fixing portion, inserting the plurality of needles into the silicon up to the position of the plurality of needles where the active region is to be formed, and injecting an insulating material with the plurality of needles inserted into the silicon to form an end portion and an insulating region.

[0195] Although an embodiment of the present invention has been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the embodiment described above should be understood as illustrative in all respects and not restrictive.

Claims

1. A needle fixing portion; a plurality of needles to which power is applied by an electrical provider; Each of the needles is formed with at least one active area and an insulating area disposed on all parts of the needle except the active area; the active area is exposed and electromagnetically energized; the insulating region is coated with an insulator; The plurality of needles include a plurality of first needles provided in a first area located at a center of the needle fixing portion; a plurality of second needles arranged in a second area of ​​the needle fixing portion that is located outside the first area, The first needle has a length greater than that of the second needle.

2. A needle tip for applying power as described in claim 1, characterized in that a plurality of active areas are formed in each of the needles, and the multiple active areas in each of the needles are arranged spaced apart from each other in the longitudinal direction of the needle.

3. The power application needle tip of claim 1, characterized in that one or more of the active areas for each of the needles are arranged at the same height, thereby providing electrical energy only to a specific depth of the skin through an energy transfer area formed between the active areas of adjacent needles.

4. The power applying needle tip according to claim 3 , wherein each of the active regions is formed to have the same size.

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