High frequency skin treatment device and its control method

Abstract

The present invention provides a high-frequency skin treatment device and a control method thereof, which is a device for performing high-frequency skin treatment by transmitting high-frequency energy to the skin, and which can perform high-frequency invasive treatment and non-invasive treatment selectively or in parallel with one device, and which can perform invasive treatment and non-invasive treatment simultaneously in parallel, thereby improving the efficiency of high-frequency energy transmission and reducing the patient's fear and pain caused by invasive treatment, thereby enabling comfortable treatment.

Description

[Technical Field]

[0001] The present invention relates to a high-frequency skin treatment device and a control method thereof, and more particularly to a skin treatment device and a control method thereof that uses high-frequency energy by applying either one or a combination of two methods selected from an invasive method and a non-invasive method to the skin to achieve effects such as wrinkle reduction and skin elasticity enhancement. [Background technology]

[0002] Human skin consists of the epidermis, dermis, and the subcutaneous fat layer below it. The dermis below the epidermis is connected to the basal layer and contains water, proteins, carbohydrates, minerals, and other substances in a jelly-like state. The dermis layer of the skin is composed of the papillary layer, which contains capillaries related to blood circulation and lymphatic vessels that transport lymph while providing nutrients to the epidermis layer, and the reticular layer, which is made up of collagen, which is a collagen fiber related to skin wrinkles, elastin, which is an elastic fiber that gives skin elasticity, and the matrix. For skin beauty treatments such as preventing skin aging, beneficial substances are supplied to the dermis layer as described above, or new collagen is synthesized. A typical treatment method for such skin beauty treatments involves inserting a microneedle into the dermis layer of the skin and applying high frequency energy to the dermal tissue to form a coagulation region in a specific area of ​​the dermal tissue, and then inducing new collagen synthesis in the dermis layer during the natural healing process of the coagulation region. For example, numerous prior art documents, such as U.S. Patent Publication US2005-0222565, U.S. Registered Patent US9,095,357, U.S. Registered Patent US9,510,899, U.S. Registered Patent US6,277,116, and U.S. Patent Publication US2002-0128641, disclose devices and methods for inserting multiple microneedles into the dermis layer of the skin and then applying RF energy to the microneedles to form a coagulation region in the dermal tissue. On the other hand, the invasive method using microneedles as described above has the advantage that the needles can penetrate directly into the dermis layer and transmit high-frequency energy, but since the invasive method causes fear and pain for the patient, devices are used that transmit high-frequency energy in a non-invasive manner to achieve effects similar to those of the invasive method. For example, Korean Patent Publication No. 2005-0114676 and U.S. Patent Publication US2014-0128944 disclose non-invasive devices in which electrodes on a chip are brought into contact with the skin and high-frequency energy is transmitted to the skin through the electrodes. However, the non-invasive high-frequency devices described above have the disadvantage that, because the electrodes come into contact with the epidermis of the skin and generate heat from high-frequency energy, there is a high risk of epidermal damage due to burns, and because it is difficult for the high-frequency heat energy to be effectively transmitted to the dermis layer below the epidermis, long-term treatment is required to achieve the desired skin treatment effect. That is, in skin treatment methods using high frequency energy, the invasive and non-invasive methods described above each have advantages and disadvantages, and the choice of which method to use is a matter of choice. However, the invasive and non-invasive high frequency treatment devices are implemented as completely separate and independent devices, or as separate and independent handpiece devices within a single main body, which causes the inconvenience of having to operate and use each device separately when performing invasive treatment and non-invasive treatment. Furthermore, as described above, when performing high-frequency skin treatment, different devices must be operated separately, making it difficult to quickly switch between invasive and non-invasive treatments in the conventional technology. Furthermore, even if an attempt is made to perform treatments in which invasive and non-invasive procedures are performed simultaneously, there is a problem in that this is not possible with the conventional techniques described above. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention provides a high-frequency skin treatment device and a control method thereof, which is a device for performing high-frequency skin treatment by transmitting high-frequency energy to the skin, and which can perform high-frequency invasive treatment and non-invasive treatment selectively or in parallel with one device, and which can perform invasive treatment and non-invasive treatment simultaneously in parallel, thereby improving the efficiency of high-frequency energy transmission and reducing the patient's fear and pain caused by invasive treatment, thereby enabling comfortable treatment. [Means for solving the problem]

[0004] A high-frequency skin treatment device according to one embodiment of the present invention includes a contact electrode unit that contacts the treatment surface of the skin and generates deep heat deep within the treatment surface using a high-frequency signal; a needle assembly having a plurality of needle electrodes that invade the treatment surface and transfer heat to the tissue using a high-frequency signal; a needle drive unit that moves the needle assembly to control the invasion of the plurality of needle electrodes; a multi-channel high-frequency generation unit including a first channel that transfers a high-frequency signal for generating the deep heat to the contact electrode unit and a second channel that transfers a high-frequency signal for heating the tissue to the plurality of needle electrodes; and a control unit that presets a plurality of treatment modes using a combination of one or two of non-invasive treatments using the contact electrode unit and invasive treatments using the plurality of needle electrodes, and controls the needle drive unit and the multi-channel high-frequency generation unit according to the selected treatment mode. Furthermore, preferably, the control unit is configured to control the depth of deep heat generation deep in the skin by the contact electrode unit by controlling the first channel of the multi-channel high-frequency generating unit and switching the high-frequency signal during the non-invasive treatment depending on the treatment mode, and to control the tissue heating depth of the invasive needle electrodes by controlling the needle driving unit and controlling the skin invasion depth of the multiple needle electrodes during the invasive treatment. Preferably, the control unit controls the first channel of the multi-channel high-frequency generating unit to transmit to the contact electrode unit a high-frequency signal of a frequency for generating deep heat by the contact electrode unit at a depth corresponding to the invasive depth of the needle electrodes selected or preset for the invasive treatment during the non-invasive treatment according to the treatment mode, and after the deep heat is generated by the contact electrode unit, controls the needle driving unit to invade the multiple needle electrodes to the invasive depth of the selected or preset needle electrodes so that the invasive treatment is performed. Preferably, the first channel of the multi-channel high frequency generator includes a first high frequency generator that generates high frequency signals of different frequencies according to the depth of deep heat generation in the deep part of the skin, and a switching connection unit that switches the high frequency signals so that a high frequency signal of a frequency selected from the high frequency signals of the multiple frequencies generated by the first high frequency generator is transmitted to the contact electrode unit. Preferably, the needle driving unit is configured to adjust the depth of skin invasion of the multiple needle electrodes by adjusting the moving distance of the needle assembly under the control of the control unit, a first channel of the multi-channel high-frequency generator generates high-frequency signals of multiple frequencies different from each other according to the depth of deep heat generation in the deep part of the skin and switches between the multiple high-frequency signals so that the high-frequency signal of a selected frequency is transmitted to the contact electrode unit, and a second channel of the multi-channel high-frequency generator is configured to generate high-frequency signals of a selected or preset frequency so that the multiple invaded needle electrodes transfer heat to tissue and transmit them to the multiple needle electrodes, and the control unit, when selecting a frequency of the high-frequency signal to be transmitted through the first channel, controls the contact electrode unit to generate deep heat in a depth region within the skin corresponding to the selected frequency, and controls the needle driving unit so that the multiple needle electrodes invade to a needle depth within the depth region where the deep heat is generated, so that the invaded needle electrodes transfer heat to the site where the deep heat is generated in accordance with the high-frequency signal. Preferably, the control unit is configured to control the first channel of the multi-channel high-frequency generating unit, the needle driving unit, and the second channel of the multi-channel high-frequency generating unit so as to select a plurality of different frequencies for the non-invasive treatment, and sequentially perform a combined treatment of generating deep heat via the contact electrode unit, invading the plurality of needle electrodes, and heating tissue via the invaded needle electrodes at each of a number of different depths within the skin corresponding to the number of selected frequencies. Preferably, the needle driving unit is provided in a handpiece, and the needle assembly is provided inside a needle tip that is detachably connected to an end of the handpiece and is configured to be connected to the needle driving unit. The lower end surface of the needle tip is provided with a plurality of needle holes through which the plurality of needle electrodes respectively pass and protrude, and the contact electrode unit is provided on the lower end surface of the needle tip around the plurality of needle holes, with a first contact electrode and a second contact electrode forming an electrode pair protruding from the lower end surface of the needle tip. Preferably, the needle driving unit is provided in a handpiece, the needle assembly is provided inside a needle tip that is detachably connected to an end of the handpiece, and is configured to be connected to the needle driving unit, and a plurality of needle holes are provided on the lower end surface of the needle tip so that the plurality of needle electrodes pass through and protrude, respectively, and the contact electrode unit includes a plurality of individual contact electrodes that are provided individually for each of the plurality of needle holes and are arranged to contact the periphery of the position on the treatment surface where each of the needle electrodes invades. Meanwhile, a control method for a high-frequency skin treatment device according to one embodiment of the present invention is a control method for a high-frequency skin treatment device that provides a treatment mode that combines a non-invasive treatment on the skin using a contact electrode unit that contacts the treatment surface of the skin and an invasive treatment in which multiple needle electrodes are invaded into the treatment surface to transfer heat to tissue in accordance with a high-frequency signal, and includes the steps of selecting a frequency of a high-frequency signal for the non-invasive treatment, applying a high-frequency signal of the selected frequency to the contact electrode unit that contacts the treatment surface to generate deep heat in a depth region within the skin corresponding to the selected frequency, controlling a needle driving unit that moves the multiple needle electrodes so that the multiple needle electrodes invade to a needle depth within the depth region where the deep heat is generated, and applying predetermined or selected high-frequency signals to the multiple needle electrodes so that heat is transferred via the multiple needle electrodes to the tissue at a needle depth within the depth region where the deep heat is generated. Preferably, the method further includes the steps of: switching the frequency applied to the contact electrode portion to a high-frequency signal of another frequency in order to change the depth region where the deep heat is generated; and controlling the needle driving portion so that the multiple needle electrodes invade to a needle depth within the depth region corresponding to the frequency changed by the switching. Meanwhile, a control method for a high-frequency skin treatment device according to another embodiment of the present invention is a control method for a high-frequency skin treatment device that provides a treatment mode that combines a non-invasive treatment on the skin using a contact electrode unit that contacts the treatment surface of the skin and an invasive treatment in which multiple needle electrodes are invaded into the treatment surface to transfer heat to the tissue in response to a high-frequency signal, and includes the steps of setting a number of multi-shot stacks and selecting a number of frequencies to be applied to the contact electrode unit corresponding to the set number of stacks, transmitting a high-frequency signal to the contact electrode unit while switching between multiple frequencies selected to generate deep heat for each depth region within the skin corresponding to the set number of stacks, setting needle depths at which the multiple needle electrodes are located for each depth region, and controlling a needle drive unit to position the multiple needle electrodes at each needle depth to transfer heat using the high-frequency signal. Preferably, the step of positioning the multiple needle electrodes at each of the needle depths and transmitting heat using high-frequency signals is characterized in that a combined treatment of generating deep heat via the contact electrode portion for each of the depth regions, moving the multiple needle electrodes to the corresponding needle depth, and heating tissue using the invasive needle electrodes is performed sequentially. Preferably, in the step of selecting the frequency to be applied to the contact electrode portion, two is selected as the number of stacks, a first frequency and a second frequency are selected as the frequencies to be applied to the contact electrode portion, and the step of positioning the plurality of needle electrodes at each needle depth to transfer heat by a high-frequency signal includes the steps of applying a high-frequency signal of the first frequency to the contact electrode portion to generate deep heat in a first depth region within the skin, controlling the needle driving unit to invade the plurality of needle electrodes to a first needle depth within the first depth region, and applying a high-frequency signal to the invaded plurality of needle electrodes to transfer heat to the tissue at the first needle depth, and controlling the needle driving unit to position the plurality of needle electrodes to a second needle depth within a second depth region corresponding to the second frequency, switching the frequency of the high-frequency signal applied to the contact electrode portion to the second frequency to generate deep heat in the second depth region within the skin, and applying a high-frequency signal to the plurality of needle electrodes positioned at the second needle depth to transfer heat to the tissue at the second needle depth. Preferably, in the step of selecting the frequency to be applied to the contact electrode portion, three is selected as the number of stacks, a first frequency, a second frequency, and a third frequency are selected as the frequencies to be applied to the contact electrode portion, and the step of positioning the plurality of needle electrodes at each needle depth and transferring heat by a high frequency signal includes the steps of applying a high frequency signal of the first frequency to the contact electrode portion to generate deep heat in a first depth region in the skin, controlling the needle driving unit to invade the plurality of needle electrodes to a first needle depth in the first depth region, and applying a high frequency signal to the invaded plurality of needle electrodes to transfer heat to tissue at the first needle depth, and controlling the needle driving unit to invade a second needle in a second depth region corresponding to the second frequency. and controlling the needle driving unit to position the plurality of needle electrodes at a third needle depth within a third depth region corresponding to the third frequency, switching the frequency of the high-frequency signal applied to the contact electrode unit to the third frequency to generate deep heat in the third depth region within the skin, and applying the high-frequency signal to the plurality of needle electrodes positioned at the third needle depth to transfer heat to the tissue at the third needle depth. [Effects of the Invention]

[0005] The high-frequency skin treatment device and its control method according to the present invention is a device that transmits high-frequency energy to the skin to perform high-frequency skin treatment, and can perform high-frequency invasive treatment and non-invasive treatment selectively or in parallel in a single device. By performing invasive treatment and non-invasive treatment simultaneously in parallel, the efficiency of high-frequency energy transmission is improved, and the patient's fear and pain caused by the invasion are alleviated, allowing for a more comfortable treatment. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a diagram showing the configuration of a high-frequency skin treatment device according to an embodiment of the present invention; [Figure 2] 2 is a diagram showing a state in which the needle electrodes have moved and protruded outward in the high-frequency skin treatment device shown in FIG. 1. FIG. [Figure 3] 1 is a block diagram showing the configuration and control system of a high-frequency skin treatment device according to an embodiment of the present invention. [Figure 4] 1A to 1C are diagrams illustrating various types of contact electrode configurations in a high-frequency skin treatment device according to an embodiment of the present invention. [Figure 5] 1 is a diagram showing a configuration in which individual contact electrodes are provided as contact electrode units in a high-frequency skin treatment device according to an embodiment of the present invention; [Figure 6] and [Figure 7] 1 is a flowchart illustrating a method for controlling a high-frequency skin treatment device according to an embodiment of the present invention, which is connected to one another at the reference point "A" to form a single flowchart. [Figure 8] 10A and 10B are diagrams illustrating a case where deep heat is generated at a deep position within the skin using a high-frequency skin treatment device according to one embodiment of the present invention, and thermal coagulation is generated using needle electrodes. [Figure 9] FIG. 9 is a diagram showing a case where deep heat is generated at a shallower position within the skin than in the case shown in FIG. 8, and where thermal coagulation is produced by needle electrodes. [Figure 10] and [Figure 11] 10A-10C illustrate an example process for performing a multi-depth combined mode using a high frequency skin treatment device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0007] The high frequency skin treatment device and its control method according to the present invention will be described in detail with reference to the drawings. The configuration, operation and control system of a high-frequency skin treatment device according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2 are diagrams showing the configuration and operation of a high-frequency skin treatment device according to one embodiment of the present invention, in which Fig. 1 shows a state before a needle for invasive treatment is operated, and Fig. 2 shows a state in which the needle is operated and protrudes to the outside. Fig. 3 is a block diagram showing the configuration and control system of a high-frequency skin treatment device according to one embodiment of the present invention. As shown in Figures 1 and 2, a high-frequency skin treatment device according to one embodiment of the present invention includes applicators 100, 200 connected to a main device (not shown), and the applicator includes a handpiece 100 configured to be held by the practitioner's hand and a needle tip 200 detachably connected to the end of the handpiece 100. As shown in FIGS. 1 and 2, a needle assembly 220 is provided inside the needle tip 200, a contact electrode unit 300 is provided at the outer end of the needle tip 200, and a needle drive unit (including a drive motor 110 and a drive shaft 112) that moves the needle assembly 220 may be provided inside the handpiece 100. The needle assembly 220 is provided inside the needle tip 200 so as to be movable in a linear direction up and down by a needle driving unit, and may include a needle base 222 connected to the driving shaft 112, and a plurality of needle electrodes 224 fixed to the needle base 222. The needle electrodes 224 may be realized as micro-needles with sharp tips and fine diameters for easy skin penetration. In addition, as shown in Figure 1, the end of the needle tip 200 may be provided with multiple needle holes 202 formed at positions corresponding to each needle electrode so that multiple needle electrodes 224 can penetrate through and protrude to the outside. When the practitioner activates an external switch (e.g., a foot switch), the drive motor 110 inside the handpiece 100 drives the drive shaft 112 in a linear direction to move the needle base 222, and as the needle base 222 moves, it moves the multiple needle electrodes 224, so that the multiple needle electrodes 224 located inside the needle tip 200, as shown in FIG. 1, can penetrate the multiple needle holes 202 of the needle tip 200 and protrude to the outside, as shown in FIG. 2. With the end of the needle tip 200 in contact with the skin, the plurality of needle electrodes 224 can protrude from the needle tip 200 through the process described above and invade the surface of the skin to be treated, and heat can be transferred to the dermal tissue in the skin by a high-frequency signal through the needle electrodes 224 that have invaded the surface of the skin to be treated. The plurality of needle electrodes 224 are electrically connected to a high-frequency generator provided inside the handpiece or in the main device, and each needle electrode can transfer heat to the tissue by a high-frequency signal generated by the high-frequency generator. The generation and transfer of high-frequency signals by the high-frequency generator will be described below. On the other hand, as shown in Figures 1 and 2, the contact electrode portion 300 provided at the end of the needle tip 200 comes into contact with the treated surface of the skin and generates deep heat in the intradermal tissue of the treated surface, i.e., deep inside, using a high-frequency signal. As described above, the multiple needle electrodes 224 of the needle assembly 220 can be used to perform skin invasive treatment using high frequency energy, and the contact electrode portion 300 provided at the end of the needle tip 200 can be used to perform high frequency non-invasive treatment. In other words, the high-frequency skin treatment device according to one embodiment of the present invention can provide a treatment mode that can perform non-invasive treatment on the skin using a contact electrode portion that contacts the treatment surface of the skin, a treatment mode that can perform invasive treatment by invading multiple needle electrodes into the treatment surface of the skin and transferring heat to the tissue in response to a high-frequency signal, and a treatment mode that combines the non-invasive treatment and invasive treatment. The contact electrode section 300, which can perform non-invasive treatment on the treatment surface of the skin, can have a first contact electrode 311 and a second contact electrode 312 that form an electrode pair and are provided protruding from the lower end surface 201 of the needle tip 200 around multiple needle holes 202 on the lower end surface 201 of the needle tip 200. The electrode pair of the first contact electrode and the second contact electrode may be provided as a single pair at the end of the needle tip 200, or as multiple pairs, but Figures 1 to 3 show a case where two pairs of contact electrodes are provided. 1 to 3, the first contact electrode 311 and the second contact electrode 312 may be disposed adjacent to each other to form an electrode pair, and the third contact electrode 321 and the fourth contact electrode 322 may be disposed adjacent to each other to form an electrode pair. Specifically, each contact electrode may be bar-shaped and disposed on each of the four sides of the lower end surface 201 of the needle tip 200. Here, two contact electrodes forming an electrode pair means that the two contact electrodes have different polarities and an electric field is formed between the two contact electrodes that make up the electrode pair when an alternating current is applied to the two contact electrodes. As shown in FIGS. 1 to 3, the first contact electrode 311 and the second contact electrode 312 form an electrode pair. JPEG2026506189000002.jpg1011), and the third contact electrode 321 and the fourth contact electrode 322 may be arranged in an "L" shape, forming an electrode pair. The contact electrode unit 300, which comprises one or more electrode pairs as described above, generates deep heat deep within the treated surface of the skin as the electrode pairs form an electric field in response to the application of a high-frequency signal while in contact with the treated surface of the skin; the lower the frequency of the high-frequency signal applied to the contact electrode unit, the deeper the depth at which deep heat is generated (i.e., the higher the frequency of the high-frequency signal, the shallower the depth at which deep heat is generated). 3, the first contact electrode 311 is shown as a positive electrode and the paired second contact electrode 312 is shown as a negative electrode, but when an AC current is applied to the two contact electrodes by a high frequency signal, the polarities of the two electrodes change in response to a phase change of the AC current. The same is true for the third contact electrode 321 and the fourth contact electrode 322. As shown in FIG. 3, a high-frequency skin treatment device according to one embodiment of the present invention includes a multi-channel high-frequency generating unit 500 including a first channel 501 that transmits a high-frequency signal to a contact electrode unit 300 to generate deep heat deep within the skin, and a second channel 502 that transmits a high-frequency signal to a plurality of needle electrodes to heat intradermal tissue, and a control unit 400 that pre-sets a plurality of treatment modes by combining any one or two of non-invasive treatments using the contact electrode unit 300 and invasive treatments using a plurality of needle electrodes, and controls the needle driving unit 110 and the multi-channel high-frequency generating unit 500 according to a treatment mode selected from the plurality of treatment modes. As shown in FIG. 3, the first channel 501 of the multi-channel high frequency generator 500 may include a first high frequency generator 510 that generates high frequency signals of different frequencies depending on the depth of deep heat generation in the skin, and a switching connector 512 that switches the high frequency signals so that a high frequency signal of a selected frequency from the high frequency signals of the multiple frequencies generated by the first high frequency generator 510 is transmitted to the contact electrode unit 300. As shown in FIG. 3, the first high frequency generating unit 510 can generate first, second, and third frequencies, which are different from each other, and the switching connecting unit 512 can selectively switch the frequency from the first to third frequencies according to the depth of deep heat generation based on the control of the control unit 400, and transmit the frequency to the contact electrode unit. For example, if the magnitude of the frequency of the high frequency signal generated by the first high frequency generating unit 510 is the first frequency < the second frequency < the third frequency, the control unit 400 first controls the switching connecting unit 512 to connect the first frequency to the contact electrode unit, thereby generating deep heat in a first depth region (depth corresponding to the first frequency) deep in the skin, and then the switching connecting unit 512 switches the frequency to connect the second frequency to the contact electrode unit, thereby generating deep heat in the second depth region (depth corresponding to the second frequency), and the switching connecting unit 512 switches the frequency to connect the third frequency to the contact electrode unit, thereby generating deep heat in a third depth region (depth corresponding to the third frequency) (here, the deep heat generation depth varies depending on the magnitude of the frequency, and the depth of the first depth region > the depth of the second depth region > the depth of the third depth region). As described above, the contact electrode unit 300 generates deep heat deep in the skin using a high-frequency signal while in contact with the skin, and can adjust the depth at which deep heat is generated by switching the signal depending on the magnitude of the frequency of the high-frequency signal. Meanwhile, while the contact electrode unit adjusts the depth of deep heat generation according to the magnitude of the frequency as described above, the needle driving unit of the needle assembly provided at the needle tip can adjust the skin penetration depth of the multiple needle electrodes by adjusting the movement distance of the needle assembly based on the control of the control unit. After the needle electrodes are inserted to the desired depth in the skin, the second high-frequency generating unit 520 of the second channel 502 transmits high-frequency signals to the multiple needle electrodes, so that the multiple needle electrodes transmit thermal energy to the tissue at the inserted depth, allowing the needle electrodes to heat the tissue at the selected depth. As shown in FIG. 3, the multiple needle electrodes 224 can be configured so that adjacent needle electrodes have different polarities, and when an alternating current (AC) is applied to each needle electrode by a high-frequency signal, the polarity of each needle electrode changes in response to a phase change in the AC current, generating an electric field between adjacent needle electrodes of different polarities, thereby applying heat to the tissue between the adjacent needle electrodes. The high frequency skin treatment device according to one embodiment of the present invention may provide a non-invasive treatment mode in which deep heat is generated deep within the skin using the contact electrode unit, the first high frequency generator, and the switching connection unit 512 as described above, an invasive treatment mode in which invasive treatment is performed by heating tissue within the skin using the needle driver, multiple needle electrodes, and the second high frequency generator, and a combined treatment mode in which non-invasive treatment and invasive treatment are combined. The combined treatment mode may include a single-depth combined mode and a multi-depth combined mode. The single-depth combined mode and the multi-depth combined mode will be described in more detail below. Meanwhile, various configurations of the contact electrode part will be described with reference to FIGS. In FIG. 4(a), the first contact electrode 331 and the second contact electrode 332 are formed in the shape of "[" and "]" around the multiple needle holes 202 protruding from the lower end surface 201 of the needle tip 200, forming an electrode pair. In FIG. 4(b), the first contact electrode 341 and the second contact electrode 342 are formed in the shape of " JPEG2026506189000003.jpg1011" shape and "L" shape, forming an electrode pair. In the combined treatment mode, deep heat is generated in the skin by the electrode pairs 331 and 332, 341 and 342 of the contact electrode section, forming a deep heat area. After preheating the tissue in this way with deep heat, the electrode pair of the needle electrode 224 invades the deep heat area and heats the tissue with high-frequency energy. This has the advantage of lowering the impedance of the skin tissue during invasive treatment, increasing the transmission efficiency of high-frequency energy, and making treatment easier. The contact electrode portion provided on the needle tip 200 shown in Fig. 5 includes a plurality of individual contact electrodes 350 that are provided individually for each of the plurality of needle holes 202 and are arranged to contact around the position of each needle electrode 224 that invades the treatment surface of the skin. Fig. 5(a) shows the state before the needle electrodes protrude through the needle holes 202, and Fig. 5(b) shows the state after the needle electrodes 224 protrude through the needle holes 202. As shown in FIG. 5, each individual contact electrode 350 is provided at a position corresponding to each needle electrode 224, and just as adjacent needle electrodes have different polarities, adjacent individual contact electrodes are also configured to have different polarities, so that an electric field can be formed between adjacent individual contact electrodes by a high-frequency signal to generate deep heat. As shown in Figure 5, when an individual contact electrode 350 is provided at each needle electrode position, the area in which deep heat is generated in the skin by the individual contact electrodes 350 of each electrode pair does not spread widely around, but can be limited to the area in which tissue is heated by the needle electrodes that make up the electrode pair at that position.Therefore, the tissue is first preheated by generating deep heat in the skin tissue, and then coagulation is formed in the deep heat generation area by heating the tissue with the needle electrodes, thereby further improving the efficiency of high-frequency energy transmission. Meanwhile, a method for controlling a high frequency skin treatment device according to an embodiment of the present invention will be described with reference to the flowcharts shown in Figures 6 and 7. Figures 6 and 7 show the operation process for each treatment mode provided by a high frequency skin treatment device according to an embodiment of the present invention, and are linked together based on "A" in Figures 6 and 7 to form a single flowchart as a whole. The high-frequency skin treatment device according to one embodiment of the present invention provides four treatment modes, namely, Mode 1 to Mode 4, and allows the practitioner to select one of the four treatment modes in consideration of the practitioner's diagnosis and the patient's condition (S10). The first mode (S100) is a non-invasive treatment mode that performs non-invasive treatment by generating deep heat deep within the skin using a contact electrode unit, a first high-frequency generating unit, and a switching connecting unit, and the second and third modes are combined treatment modes that perform non-invasive treatment and invasive treatment in combination, with the second mode (S200) being a single-depth combined mode, the third mode (S300) being a multiple-depth combined mode, and the fourth mode (S400) being an invasive treatment mode that performs invasive treatment by heating tissue within the skin using a needle driving unit, multiple needle electrodes, and a second high-frequency generating unit. When the first mode is selected (S100), the practitioner can select a number of frequencies to be applied to the contact electrode portion according to the depth of deep heat generation (S110). Here, the selected frequencies are referred to as the first frequency, the second frequency, and the third frequency. With the contact electrode unit in contact with the skin, the previously selected first frequency is applied to the contact electrode unit to generate deep heat in a first depth region within the skin corresponding to the first frequency (S120). That is, the control unit controls the switching connection unit to connect the first frequency among the multiple frequencies generated by the first high frequency generation unit to the contact electrode unit, thereby generating deep heat in the first depth region. After the application of the first frequency to the contact electrode unit is completed, the control unit controls the switching connection unit to perform frequency switching to the second frequency so that the second frequency is connected to the contact electrode unit (S130). The contact electrode unit to which the second frequency is applied can generate deep heat in a second depth region within the skin corresponding to the second frequency (S140). After the application of the second frequency to the contact electrode unit is completed, the control unit controls the switching connection unit to perform frequency switching to the third frequency so that the third frequency is connected to the contact electrode unit (S150). The contact electrode unit to which the third frequency is applied can generate deep heat in a third depth region within the skin that corresponds to the third frequency (S160). In this way, by using the contact electrode portion to generate deep heat in various depth regions within the skin, non-invasive treatment can be performed on the surface of the skin to be treated. On the other hand, when the second mode, which is the single-depth composite mode, is selected (S200), a frequency corresponding to the depth within the skin that requires treatment, i.e., the frequency to be applied to the contact electrode unit, is selected (S210), and the selected frequency is applied to the contact electrode unit while the contact electrode unit is in contact with the surface of the skin to be treated, thereby generating deep heat in the first depth region within the skin (S220). As described above, deep heat is generated in the first depth region via the contact electrode portion by applying a frequency to the contact electrode portion for a preset time period or for a time period set by the practitioner. After the application of the frequency to the contact electrode unit is completed (S230), the control unit operates and controls the drive motor of the needle drive unit to move the needle assembly, thereby inserting the needle electrode to a first needle depth within the first depth region (S240). Then, a preset frequency is applied to the needle electrode, heating the tissue through the needle electrode at the site where deep heat is generated, thereby creating a thermocoagulation site (S250). That is, a needle electrode is inserted into the preheated tissue in the first depth region, which is the region where deep heat generated by the contact electrode portion has acted, and thermal coagulation is produced by high-frequency energy. In this way, by generating deep heat in the tissue within the skin through the contact electrode portion, the impedance of the skin tissue is reduced and the transmission efficiency of the high-frequency energy transmitted by the needle electrode is increased, thereby reducing the fear and pain caused by the invasion and enabling a more comfortable treatment. Treatment using the single-depth combined mode as described above can control the frequency of the high-frequency signal applied to the contact electrode section and the insertion depth of the needle electrode using the needle drive section so that deep heat generation and thermal coagulation are achieved at a selected or preset depth. That is, when the insertion depth of the needle electrode is set (or selected) to a first needle depth, the frequency applied to the contact electrode portion can be adjusted to a first frequency so that the contact electrode portion generates deep heat in a predetermined area including the first needle depth, and when the insertion depth of the needle electrode is set (or selected) to a second needle depth, the frequency applied to the contact electrode portion can be adjusted to a second frequency so that the contact electrode portion generates deep heat in a predetermined area including the second needle depth. After generating thermal coagulation by invasive needle electrode and application of high frequency as described above, the control unit can terminate the application of frequency to the needle electrode and control the drive motor to return the needle electrode to its original position (S260). The treatment using the single-depth combined mode will be described in more detail with reference to FIGS. Figure 8 shows a case where deep heat is generated at a deep position within the skin and thermal coagulation is produced using a needle electrode, while Figure 9 shows a case where deep heat is generated at an even shallower position within the skin than in the case shown in Figure 8 and thermal coagulation is produced using a needle electrode. In other words, the depth to which the needle electrode penetrates into the skin can be selected and determined in advance by the practitioner, or can be set in advance. When the first needle depth is deeper than the second needle depth, Figure 8 shows a process of inserting a needle electrode to the first needle depth to transmit high-frequency energy to the tissue in the skin and generate thermal coagulation, in which deep heat is transmitted to a predetermined region including the first needle depth via the contact electrode portion to preheat the predetermined region including the first needle depth (referred to as the "first depth region") before inserting the needle electrode. Figure 9 shows a process of inserting a needle electrode to the second needle depth (a depth shallower than the first needle depth) to transmit high-frequency energy to the tissue in the skin and generate thermal coagulation, in which deep heat is transmitted to a predetermined region including the second needle depth via the contact electrode portion to preheat the predetermined region including the second needle depth (referred to as the "second depth region") before inserting the needle electrode. As shown in (a) of Figure 8, when the contact electrode unit 300 provided at the end of the needle tip 200 is in contact with the surface of the skin, the control unit controls the switching connection unit to connect a first frequency among the multiple frequencies generated by the first high-frequency generating unit to the contact electrode unit 300, thereby transmitting deep heat HD1 to the intradermal tissue D. By transmitting deep heat HD1 to tissue D for a preset time or a time selected by the practitioner, the first depth region WD1 becomes preheated, as shown in (b) of Figure 8, and the generation of deep heat by the contact electrode portion 300 ends. Next, as shown in (c) of Figure 8, the control unit activates the drive motor 110, causing the drive shaft 112 to move the needle assembly downward, and the needle electrode 224 passes through the needle hole and is inserted into the skin.At this time, based on the control of the drive motor by the control unit, the needle electrode 224 is inserted to a first needle depth h1 within a first depth region WD1 that has been preheated by deep heat. As shown in (d) of Figure 8, the control unit controls the second high-frequency generating unit to transmit a high-frequency signal to the needle electrode 224, thereby heating tissue by high-frequency energy near each end of the needle electrode 224 and generating thermal coagulation CA1. Such a thermal coagulation CA1 is generated near the first needle depth h1 within the first depth region WD1 that has already been preheated by the deep heat of the contact electrode portion. As described above, by generating deep heat using the contact electrode portion in the first depth region WD1 within the skin and preheating the tissue D, the impedance of the skin tissue can be reduced, and by inserting the needle electrode to the first needle depth h1 within the first depth region WD1 and transmitting high-frequency energy, the efficiency of energy transmission to the tissue can be increased, thereby reducing the fear and pain caused by the invasion and enabling a more comfortable treatment. On the other hand, rather than performing the treatment only at a specific depth as described above, the treatment can be performed continuously at other depths as well, and after creating thermal coagulation CA1 at the first needle depth h1, treatment can be performed to create thermal coagulation at a second needle depth that is even shallower than the first needle depth, as shown in Figure 9. As shown in (a) of Figure 9, with the contact electrode unit 300 provided at the end of the needle tip 200 in contact with the surface of the skin, the control unit controls the switching connection unit to connect the second frequency of the multiple frequencies generated by the first high-frequency generating unit to the contact electrode unit 300, thereby transmitting deep heat HD2 to the tissue D within the skin. As mentioned above, the lower the frequency, the deeper the depth at which deep heat is generated, and conversely, the higher the frequency, the shallower the depth at which deep heat is generated.Therefore, in Figure 8, the contact electrode portion transfers deep heat to a first depth region within the skin using a first frequency, and in Figure 9, by applying a second frequency that is even higher than the first frequency to the contact electrode portion, deep heat can be transferred to a second depth region WD2 that is even shallower than the first depth region. By transmitting deep heat HD2 to tissue D for a preset time or a time selected by the practitioner, the second depth region WD2 becomes preheated, as shown in (b) of Figure 9, and the generation of deep heat by the contact electrode portion 300 ends. Next, as shown in (c) of Figure 9, the control unit activates the drive motor 110, causing the drive shaft 112 to move the needle assembly downward, and the needle electrode 224 passes through the needle hole and is inserted into the skin. At this time, based on the control of the drive motor by the control unit, the needle electrode 224 is inserted to a second needle depth h2 within the second depth region WD2 preheated by deep heat. As shown in (d) of Figure 9, the control unit controls the second high-frequency generating unit to transmit a high-frequency signal to the needle electrode 224, thereby heating tissue by high-frequency energy near each end of the needle electrode 224 and generating thermal coagulation CA2. Such a thermal coagulation CA2 is generated near the second needle depth h2 within the second depth region WD2 that has already been preheated by the deep heat of the contact electrode portion. As described above, by generating deep heat using the contact electrode portion in the second depth region WD2 within the skin and preheating the tissue D, the impedance of the skin tissue can be reduced, and by inserting the needle electrode to the second needle depth h2 within the second depth region WD2 and transmitting high-frequency energy, the efficiency of energy transmission to the tissue can be increased, thereby reducing the fear and pain caused by the invasion and enabling a more comfortable treatment. Meanwhile, the third mode, which is a multi-depth combined mode, and the fourth mode for interventional procedures will be described with reference to the flowchart shown in FIG. The multi-depth combined mode is a multi-shot treatment that generates deep heat and creates thermal coagulation using needle electrodes at multiple depths within the skin (where one shot is used to create thermal coagulation at one depth, multi-shot means creating thermal coagulation at multiple depths). The number of depths at which shots are performed is referred to as the "stack number." For example, a stack number of 2 means that shots are performed at two different depths within the skin. When the third mode, which is a multi-depth composite mode, is selected (S300), the number of multi-shot stacks is set, and multiple frequencies applied to the contact electrode part according to the depth of deep heat generation in the skin can be selected corresponding to the set number of stacks (S310). For example, if the stack number is set to 2, treatment is performed to a needle depth of two layers within the skin, and for this purpose, two frequencies can be selected so that the contact electrode portion can generate deep heat in depth regions corresponding to the two needle depths, respectively. Here, we will explain an example in which the contact electrode portion generates deep heat in a first depth region including the first needle depth and a second depth region including the second needle depth in order for the needle electrode to perform shots at the first needle depth and the second needle depth, respectively, and a first frequency and a second frequency are selected from the multiple frequencies generated by the first high-frequency generating portion to generate such deep heat. With the contact electrode portion of the needle tip in contact with the skin, in the first channel of the multi-channel high frequency generator, the control unit can control so that a first frequency among the selected frequencies is connected to the contact electrode portion by the switching connection unit, and the contact electrode portion to which the first frequency is applied can generate deep heat in a first depth region within the skin corresponding to the first frequency (S320). Deep heat generation in the first depth region via the contact electrode unit is performed by applying a frequency to the contact electrode unit for a preset time or a time set by the practitioner. After application of the frequency to the contact electrode unit is completed, the control unit operates and controls the drive motor of the needle drive unit to move the needle assembly, thereby inserting the needle electrode to the first needle depth within the first depth region (S330). Then, a preset frequency is applied to the needle electrode to heat tissue via the needle electrode in the area where deep heat has been generated, thereby creating a thermocoagulation site (S340). That is, a needle electrode is inserted into the preheated tissue in the first depth region, which is the region where deep heat generated by the contact electrode portion has acted, and thermal coagulation is produced by high-frequency energy. When the application of the frequency to the needle electrode is completed, after completing one of the two stack numbers, the control unit can control the drive motor to move the needle assembly so that the needle electrode is positioned at the second needle depth for treatment of the next layer (S350). That is, after the needle electrode performs a shot at the first needle depth, it can be made to immediately move to the second needle depth without returning. After the needle electrode moves to the second needle depth, in the first channel of the multi-channel high frequency generator, the control unit can control the switching connection unit to switch to the second frequency so that the second frequency is connected to the contact electrode unit, and the contact electrode unit to which the second frequency is applied can generate deep heat in a second depth region within the skin corresponding to the second frequency (S360). Deep heat is generated in the second depth region via the contact electrode unit by applying a frequency to the contact electrode unit for a preset time or for a time set by the practitioner, and after the application of the frequency to the contact electrode unit is completed, the control unit can apply a preset frequency to the needle electrode to heat the tissue via the needle electrode at the site where deep heat was generated, thereby creating a thermal coagulation site (S370). In other words, the needle electrode, which is already located at the second needle depth, can heat the tissue with high-frequency energy to produce thermal coagulation in the preheated tissue in the second depth region, which is the area where the deep heat generated by the contact electrode portion acts. After generating thermal coagulation by invasively inserting the needle electrode and applying high frequency to multiple depths according to the number of stacks set as described above, the control unit can terminate the application of frequency to the needle electrode and control the drive motor to return the needle electrode to its original position (S380). In this way, by generating deep heat by the contact electrode and generating thermal coagulation by the needle electrode continuously at multiple depths within the skin, the efficiency of energy transmission is improved, and the fear and pain caused by the invasion are reduced, making the treatment easier. In addition, the treatment time can be significantly reduced compared to when treatment is performed separately for each depth. The treatment using the multi-depth combined mode will be described in more detail with reference to FIGS. Figures 10 and 11 show an example of a multi-depth combined mode treatment according to steps S310 to S380 described above. Although the treatment steps according to the multi-depth combined mode are shown separately in Figures 10 and 11, Figures 10 and 11 show a single treatment process as a whole. That is, the multi-depth composite mode according to steps S310 to S380 shows the procedure performed in the order of Figure 10(a) → Figure 10(b) → Figure 10(c) → Figure 10(d) → Figure 11(a) → Figure 11(b) → Figure 11(c) → Figure 11(d). The number of multi-shot stacks is set to 2, and the first and second frequencies can be selected as the frequency applied to the contact electrode unit depending on the depth of deep heat generation within the skin, corresponding to the set number of stacks. First, as shown in (a) of Figure 10, with the contact electrode unit 300 provided at the end of the needle tip 200 in contact with the surface of the skin, the control unit controls the switching connection unit to connect the first frequency to the contact electrode unit 300, thereby transmitting the first deep heat hd1 to the tissue D within the skin. As the first deep heat hd1 is generated by the contact electrode portion 300, the first depth region wd1 of the tissue D within the skin is preheated, as shown in (b) of Figure 10, and the generation of the first deep heat by the contact electrode portion 300 ends. Next, as shown in (c) of Figure 10, the control unit activates the drive motor 110, causing the drive shaft 112 to move the needle assembly downward, and the needle electrode 224 passes through the needle hole and is inserted into the skin.At this time, based on the control of the drive motor by the control unit, the needle electrode 224 is inserted to a first needle depth h1 within a first depth region wd1 that has been preheated by deep heat. As shown in (d) of Figure 10, the control unit controls the second high-frequency generating unit to transmit a high-frequency signal to the needle electrode 224, thereby heating the tissue with high-frequency energy near each end of the needle electrode 224 and generating a thermal coagulation CA1 at the first needle depth h1 within the first depth region WD1 preheated by deep heat. Once the thermal coagulation ca1 is generated at the first needle depth h1 in this manner, the transmission of high-frequency energy through the needle electrode 224 ends, and then, as shown in (a) of Figure 11, the control unit controls the drive motor 110 to move the needle assembly 220 so that the needle electrode 224 is positioned at the second needle depth h2. In this state, the control unit can control the switching connection unit to switch to the second frequency and connect the second frequency to the contact electrode unit 300, as shown in (b) of Figure 11, and the contact electrode unit 300 to which the second frequency is applied can generate second deep heat hd2 in a second depth region within the skin corresponding to the second frequency. In this way, the second deep heat hd2 is generated and the second depth region of the intradermal tissue is preheated, and as shown in (c) of Figure 11, the first depth region and the second depth region wd2 can all be preheated. After the deep heat is transmitted to the second depth region, the application of the second frequency to the contact electrode unit 300 is terminated, and as shown in (d) of Figure 11, the control unit controls the second high-frequency generating unit to transmit a high-frequency signal to the needle electrode 224, thereby heating the tissue by high-frequency energy near each end of the needle electrode 224 and generating a thermal coagulation ca2 at the second needle depth h2 within the second depth region preheated by the deep heat. As described above, in the multi-depth combined mode, in a single process, thermal coagulation ca1 and ca2 can be generated at the first needle depth h1 and the second needle depth h2, respectively, to complete multi-shots, as shown in (d) of Figure 11. Figures 10 and 11 show a process of generating thermal coagulation at two depths using two stack numbers, but this is not limited to this, and deep heat generation and thermal coagulation can be performed at multiple depths using three or more stack numbers. For example, three may be selected as the number of multi-shot stacks in the multiple depth composite mode, and a first frequency, a second frequency, and a third frequency may be selected as frequencies applied to the contact electrode portion. Thus, a high-frequency signal of a first frequency is applied to the contact electrode unit to generate deep heat in a first depth region within the skin, the control unit controls the needle driving unit to invade the plurality of needle electrodes to a first needle depth within the first depth region, and a high-frequency signal is applied to the invaded plurality of needle electrodes to transfer heat to tissue at the first needle depth and generate thermocoagulation, and then the control unit controls the needle driving unit to position the plurality of needle electrodes at a second needle depth within a second depth region corresponding to a second frequency, and switches the frequency of the high-frequency signal applied to the contact electrode unit to the second frequency to generate deep heat in the second depth region within the skin, and transfers heat to the second needle depth. A high-frequency signal can be applied to the multiple needle electrodes positioned at the third needle depth to transfer heat to the tissue at the second needle depth and create thermal coagulation.The control unit then controls the needle drive unit to position the multiple needle electrodes at the third needle depth within the third depth region corresponding to the third frequency, switches the frequency of the high-frequency signal applied to the contact electrode unit to the third frequency to generate deep heat in the third depth region within the skin, and applies a high-frequency signal to the multiple needle electrodes positioned at the third needle depth to transfer heat to the tissue at the third needle depth and create thermal coagulation, thereby creating thermal coagulation at three different depths within the skin and completing multi-shot. In this way, by generating deep heat by the contact electrode and generating thermal coagulation by the needle electrode continuously at multiple depths within the skin, the efficiency of energy transmission is improved, and the fear and pain caused by the invasion are reduced, making the treatment easier. In addition, there is an advantage in that the treatment time can be significantly shortened compared to when performing treatment separately for each depth. Meanwhile, returning to FIG. 7, when the fourth mode, which is an invasive treatment mode, is selected (S400), the needle electrode invasive depth can be set by the practitioner (S410), and the control unit can insert the needle electrode to the set depth by controlling the drive motor to move the needle assembly (S420). Then, with the needle electrode inserted to the set depth, the control unit can apply a preset frequency to the needle electrode to heat the skin tissue at the insertion position and generate thermal coagulation (S430). After the application of the frequency to the needle electrode is completed, the control unit can control the drive motor to return the needle electrode to its original position (S440). As described above, the high-frequency skin treatment device and its control method according to one embodiment of the present invention is an apparatus that transmits high-frequency energy to the skin to perform high-frequency skin treatment, and can perform high-frequency invasive treatment and non-invasive treatment selectively or in parallel in a single device. By performing invasive treatment and non-invasive treatment simultaneously in parallel, the efficiency of high-frequency energy transmission is improved, and the patient's fear and pain caused by the invasion are reduced, allowing for a more comfortable treatment. It is also possible to perform multiple treatments at multiple depths within the skin in a single process, which significantly reduces the treatment time. [Industrial Applicability]

[0008] The high frequency skin treatment device and its control method according to the present invention can be used in the industrial fields of skin beauty and skin treatment, which can achieve effects such as wrinkle reduction and skin elasticity enhancement using high frequency.

Claims

1. A contact electrode portion that contacts the treatment surface of the skin and generates deep heat in the deep part of the treatment surface by a high-frequency signal; a needle assembly having a plurality of needle electrodes that invade the treatment surface and transfer heat to the tissue by a high-frequency signal; a needle driving unit that moves the needle assembly to control the invasion of the plurality of needle electrodes; a multi-channel radio frequency generating unit including a first channel for transmitting a radio frequency signal for generating deep heat to the contact electrode unit, and a second channel for transmitting a radio frequency signal for heating the tissue to the plurality of needle electrodes; A high-frequency skin treatment device including: a control unit that pre-sets multiple treatment modes by combining one or two of non-invasive treatments using the contact electrode unit and invasive treatments using the multiple needle electrodes, and controls the needle driving unit and the multi-channel high-frequency generating unit according to the selected treatment mode.

2. The control unit The high-frequency skin treatment device of claim 1, characterized in that it is configured to control the depth of deep heat generation deep in the skin by the contact electrode unit by controlling the first channel of the multi-channel high-frequency generating unit to switch the high-frequency signal during the non-invasive treatment depending on the treatment mode, and to control the tissue heating depth of the invasive needle electrodes by controlling the needle driving unit to control the skin invasion depth of the multiple needle electrodes during the invasive treatment.

3. The control unit 2. The high-frequency skin treatment device of claim 1, wherein, depending on the treatment mode, the first channel of the multi-channel high-frequency generating unit is controlled to transmit to the contact electrode unit a high-frequency signal of a frequency for generating deep heat by the contact electrode unit at a depth corresponding to the invasive depth of the needle electrodes selected or preset for the invasive treatment during the non-invasive treatment, and after the deep heat is generated by the contact electrode unit, the needle driving unit is controlled to invade the multiple needle electrodes to the invasive depth of the selected or preset needle electrodes so that the invasive treatment is performed.

4. 2. The high frequency skin treatment device of claim 1, wherein the first channel of the multi-channel high frequency generator includes: a first high frequency generator that generates high frequency signals of different frequencies according to the depth of deep heat generation in the skin; and a switching connection unit that switches high frequency signals so that a high frequency signal of a selected frequency from the high frequency signals of the multiple frequencies generated by the first high frequency generator is transmitted to the contact electrode unit.

5. the needle driving unit is configured to adjust the skin invasion depth of the plurality of needle electrodes by adjusting the movement distance of the needle assembly under the control of the control unit, The first channel of the multi-channel high frequency generator generates high frequency signals of different frequencies according to the depth of deep heat generation in the skin, and the high frequency signals of the different frequencies are switched to transmit the high frequency signal of the selected frequency to the contact electrode unit; a second channel of the multi-channel radio frequency generator configured to generate and transmit to the plurality of needle electrodes radio frequency signals at a selected or preset frequency such that the plurality of needle electrodes transmit heat to tissue; The high-frequency skin treatment device of claim 1, characterized in that when the frequency of the high-frequency signal transmitted through the first channel is selected, the control unit controls the contact electrode unit to generate deep heat in a depth region within the skin corresponding to the selected frequency, and controls the needle driving unit so that the multiple needle electrodes invade to a needle depth within the depth region where the deep heat is generated, so that the invaded needle electrodes transmit heat in accordance with the high-frequency signal to the area where the deep heat is generated.

6. The control unit 2. The high frequency skin treatment device of claim 1, wherein the device is configured to control the first channel of the multi-channel high frequency generator, the needle driving unit, and the second channel of the multi-channel high frequency generator, respectively, so as to sequentially perform a combined treatment of generating deep heat through the contact electrode unit, invading the multiple needle electrodes, and heating tissue through the invaded needle electrodes at different depths in the skin corresponding to the number of selected frequencies by selecting a plurality of different frequencies for the non-invasive treatment.

7. the needle driver is provided in a handpiece, and the needle assembly is provided inside a needle tip that is detachably coupled to an end of the handpiece and is configured to be coupled with the needle driver; a plurality of needle holes are provided in a lower end surface of the needle tip so that the plurality of needle electrodes pass through and protrude, The high-frequency skin treatment device of claim 1, characterized in that the contact electrode portion is provided on the lower end surface of the needle tip around the plurality of needle holes, with a first contact electrode and a second contact electrode forming an electrode pair protruding from the lower end surface of the needle tip.

8. the needle driver is provided in a handpiece, and the needle assembly is provided inside a needle tip that is detachably coupled to an end of the handpiece and is configured to be coupled with the needle driver; a plurality of needle holes are provided in a lower end surface of the needle tip so that the plurality of needle electrodes pass through and protrude, The high-frequency skin treatment device of claim 1, characterized in that the contact electrode portion includes a plurality of individual contact electrodes provided for each of the plurality of needle holes and arranged to contact around the positions on the treatment surface where the respective needle electrodes invade.

9. A control method for a high frequency skin treatment device that provides a treatment mode by combining a non-invasive treatment for the skin using a contact electrode portion that contacts the treatment surface of the skin, and an invasive treatment in which a plurality of needle electrodes are invaded into the treatment surface and heat is transferred to tissue in response to a high frequency signal, selecting a frequency of a radiofrequency signal for the non-invasive procedure; A step of applying a high-frequency signal of the selected frequency to the contact electrode portion in contact with the treatment surface, thereby generating deep heat in a depth region within the skin corresponding to the selected frequency; controlling a needle driving unit that moves the plurality of needle electrodes so that the plurality of needle electrodes invade a needle depth within the depth region where the deep heat is generated; A method for controlling a high-frequency skin treatment device, comprising the step of applying a predetermined or selected high-frequency signal to the plurality of needle electrodes so that heat is transferred via the plurality of needle electrodes to tissue at a needle depth within the depth region where the deep heat is generated.

10. A step of switching and changing the frequency applied to the contact electrode portion to a high frequency signal of another frequency in order to change the depth region where the deep heat is generated; The method for controlling a high-frequency skin treatment device according to claim 9, further comprising the step of controlling the needle driving unit so that the plurality of needle electrodes invade to a needle depth within a depth range corresponding to the frequency changed by the switching.

11. A control method for a high frequency skin treatment device that provides a treatment mode by combining a non-invasive treatment for the skin using a contact electrode portion that contacts the treatment surface of the skin, and an invasive treatment in which a plurality of needle electrodes are invaded into the treatment surface and heat is transferred to tissue in response to a high frequency signal, a step of setting the number of multi-shot stacks and selecting a number of frequencies to be applied to the contact electrode portion corresponding to the set number of stacks; A method for controlling a high-frequency skin treatment device, comprising the steps of: transmitting a high-frequency signal to the contact electrode portion while switching between a plurality of frequencies selected to generate deep heat for each depth region within the skin corresponding to the set number of stacks; setting a needle depth at which the plurality of needle electrodes are located for each depth region; and controlling a needle driving portion to position the plurality of needle electrodes at each needle depth and transmit heat by the high-frequency signal.

12. The step of transferring heat by a high frequency signal by positioning the plurality of needle electrodes at each needle depth includes: A control method for a high-frequency skin treatment device as described in claim 11, characterized in that a combined treatment of generating deep heat through the contact electrode portion, moving the position of the multiple needle electrodes to the corresponding needle depth, and heating tissue by the invasive needle electrodes is performed sequentially for each depth region.

13. In the step of selecting a frequency to be applied to the contact electrode portion, Two is selected as the number of stacks, and a first frequency and a second frequency are selected as the frequencies applied to the contact electrode portion, The step of transferring heat by a high frequency signal by positioning the plurality of needle electrodes at each needle depth includes: applying a high-frequency signal of the first frequency to the contact electrode unit to generate deep heat in a first depth region within the skin, controlling the needle driving unit to invade the plurality of needle electrodes to a first needle depth within the first depth region, and applying a high-frequency signal to the invaded plurality of needle electrodes to transfer heat to tissue at the first needle depth; 12. The method for controlling a high-frequency skin treatment device according to claim 11, further comprising the steps of: controlling the needle driving unit to position the plurality of needle electrodes at a second needle depth within a second depth region corresponding to the second frequency; switching the frequency of the high-frequency signal applied to the contact electrode unit to the second frequency to generate deep heat in the second depth region within the skin; and applying a high-frequency signal to the plurality of needle electrodes positioned at the second needle depth to transfer heat to the tissue at the second needle depth.

14. In the step of selecting a frequency to be applied to the contact electrode portion, Three is selected as the number of stacks, and a first frequency, a second frequency, and a third frequency are selected as the frequencies applied to the contact electrode portion, The step of transferring heat by a high frequency signal by positioning the plurality of needle electrodes at each needle depth includes: applying a high-frequency signal of the first frequency to the contact electrode unit to generate deep heat in a first depth region within the skin, controlling the needle driving unit to invade the plurality of needle electrodes to a first needle depth within the first depth region, and applying a high-frequency signal to the invaded plurality of needle electrodes to transfer heat to tissue at the first needle depth; controlling the needle driving unit to position the plurality of needle electrodes at a second needle depth within a second depth region corresponding to the second frequency, switching the frequency of the high frequency signal applied to the contact electrode unit to the second frequency to generate deep heat in the second depth region within the skin, and applying the high frequency signal to the plurality of needle electrodes positioned at the second needle depth to transfer heat to tissue at the second needle depth; 12. The method for controlling a high-frequency skin treatment device according to claim 11, further comprising the steps of: controlling the needle driving unit to position the plurality of needle electrodes at a third needle depth within a third depth region corresponding to the third frequency; switching the frequency of the high-frequency signal applied to the contact electrode unit to the third frequency to generate deep heat in the third depth region within the skin; and applying a high-frequency signal to the plurality of needle electrodes positioned at the third needle depth to transfer heat to the tissue at the third needle depth.

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