Skin care equipment

Abstract

The present invention relates to a skin management device that includes a main body including a first terminal; and a head portion, and by applying different frequencies to multiple electrodes in alternating fashion at a set period, high-frequency thermal energy can be transmitted evenly from the upper dermis to the lower dermis in RF mode.

Description

[Technical Field]

[0001] The present invention relates to a skin care device that applies different frequencies to multiple electrodes in alternating fashion at set intervals, so that high-frequency thermal energy is transmitted evenly from the upper to lower dermis layers, and that forms a passage for cosmetics (formulation) to move in the innermost electrodes of the multiple electrodes, while not forming a passage for movement in the outermost electrodes, so that the cosmetics are spread evenly only inside the head portion during use. [Background technology]

[0002] Human skin can become polluted by external activities and wrinkles can form due to aging, hormonal changes, etc. In recent years, as interest in skin has increased, various cleansing devices that can effectively remove skin pollutants, as well as devices for skin beauty and anti-aging, have been developed.

[0003] For example, devices that deliver high-frequency or infrared energy to the skin have been developed. These devices apply thermal energy to the skin, improving the elasticity of the applied skin area and effectively delivering beauty products to the skin.

[0004] Additionally, devices that deliver sound waves and light to the skin have been developed. For example, sonophoresis and laser poration devices have been developed that can deliver cosmetic products to the inside of the skin using ultrasound or laser light. These devices can form a pathway for injecting cosmetics into the skin using ultrasound or laser light, thereby increasing the skin penetration rate of the cosmetic products.

[0005] Additionally, devices have been developed that physically deliver beauty products to the skin using a small amount of current. For example, devices that use iontophoresis, electroporation, electroosmosis, etc., can effectively deliver active ingredients into the skin by applying an electric current to charged or neutral beauty products.

[0006] That is, various devices have been developed that can provide skin beautification and anti-aging functions by utilizing light energy, sound waves, electric current, vibration, etc.

[0007] Generally, beauty devices that use high frequency waves are devices that apply electrical stimulation to the skin to care for the skin, and can provide electrical stimulation in the high frequency band to the skin. More specifically, when high frequency waves are applied to the skin, deep heat, which is frictional heat, is generated as ions in cells move from the negative electrode to the positive electrode. The deep heat is approximately 40°C to 50°C, and sterilizes the skin. Furthermore, the deep heat dilates blood vessels in the skin, facilitating metabolic function and effectively delivering beauty products to the skin.

[0008] For this reason, devices using high frequency waves include electrodes formed on the surface, which can come into contact with the user's skin. However, when the device is used on a curved skin area such as the face, the electrodes may not contact the skin smoothly. As a result, there is a problem that high frequency waves may be applied excessively to some areas, causing skin damage such as burns, and high frequency waves may not be applied to other areas.

[0009] In addition, the electrodes of the device generally protrude from the surface of the device to contact the skin, which can make it difficult to smoothly massage curved areas of the skin, such as the cheeks, chin, and corners of the eyes, when a user holds the device and massages the skin.

[0010] Therefore, there is a need for a new skin care device that can solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention was created to solve the problems of the prior art as described above, and the object of the present invention is to provide a skin care device that allows high-frequency thermal energy to be evenly transmitted from the upper dermis to the lower dermis, and that allows cosmetics to be evenly spread only inside the head during use. [Means for solving the problem]

[0012] a second terminal disposed on a lower portion of the substrate and electrically connected to the first terminal of the body; and a third electrode disposed on the second electrode and equally spaced apart from the first electrode; and a fourth electrode disposed on the third electrode and equally spaced apart from the first electrode. The first, second, third, and fourth electrodes operate in a first RF mode, and the first RF mode applies different frequencies to any two of the first, second, third, and fourth electrodes in a first RF mode so as to alternately apply different frequencies at a set period to each of the first, second, third, and fourth electrodes, thereby allowing high-frequency thermal energy to be evenly transmitted from the upper dermis to the lower dermis.

[0013] Specifically, in the first RF mode, the frequencies used for the first, second, third, and fourth electrodes are set to four frequencies in the range of 1 MHz to 3 MHz (high frequency), and the four frequencies can be set to the first frequency, second frequency, third frequency, and fourth frequency in order from longest to shortest frequency.

[0014] Specifically, the first frequency is 2.2M H z, the second frequency may be set to 1.8 MHz, the third frequency may be set to 1.4 MHz, and the fourth frequency may be set to 1.0 MHz.

[0015] Specifically, the device further includes an acceleration mode for rapid heat transfer to the skin before the operation of the first RF mode, and the acceleration mode is activated by selecting any one of acceleration level 1, acceleration level 2, and acceleration level 3, which are set in order from shortest to longest acceleration time, and the current of the first frequency is supplied to the third and fourth electrodes with a duty of 100%, and a negative current is applied to one of the third and fourth electrodes and a positive current is applied to the other electrode.

[0016] Specifically, the first RF mode is automatically executed for a predetermined time from the time when the acceleration mode is completed, and is automatically interrupted after the predetermined time has elapsed. The first RF mode may be divided into Step 1 and Step 2, in which currents of any two of the first, second, third, and fourth frequencies are alternately applied to any two of the first, second, third, and fourth electrodes at a set period, and no current is supplied to the other two electrodes.

[0017] Specifically, in the first RF mode, in step 1, currents of the second frequency and the fourth frequency are alternately applied to each of the first and second electrodes several times to several tens of times in a cycle of less than one second during a first set time, and in step 2, currents of the first frequency and the third frequency are alternately applied to each of the third and fourth electrodes several times to several tens of times in a cycle of less than one second during the first set time, and a negative current is applied to one of the two first and second electrodes or the two third and fourth electrodes; A positive current is applied to the other electrode. Step 1 and step 2 may be alternately performed with a second set time interval in between during which no current is supplied to the first, second, third, and fourth electrodes.

[0018] Specifically, the first set time may become longer as the acceleration level goes from the acceleration level 1 to the acceleration level 3, and the second set time may become relatively shorter as the acceleration level goes from the acceleration level 1 to the acceleration level 3.

[0019] Specifically, the first RF mode may be repeatedly executed for a certain period of time after the acceleration mode in the order of step 1, step 2, step 1, and step 2.

[0020] Specifically, the first, second, third, and fourth electrodes are operated in a first EMS mode instead of the first RF mode. The first EMS mode is divided into steps 3, 4, and 5, in which a current of a fifth frequency is applied to any two of the first, second, third, and fourth electrodes at a set period, and no current is supplied to the other two electrodes. In step 3, the current of the fifth frequency is applied to each of the third and fourth electrodes, in step 4, the current of the fifth frequency is applied to each of the first and fourth electrodes, and in step 5, the current of the fifth frequency is applied to each of the first and second electrodes, and a negative current may be applied to one of the two third and fourth electrodes, two first and fourth electrodes, or two first and second electrodes, and a positive current may be applied to the other electrode.

[0021] Specifically, the first EMS mode is executed by selecting one of stimulation levels 1, 2, and 3, which are set in order from shortest to longest so that the stimulation times are different for each of steps 3, 4, and 5, and current can be prevented from being supplied to each of the first, second, third, and fourth electrodes for a certain period of time between each of steps 3, 4, and 5.

[0022] Specifically, the first EMS mode can be executed repeatedly for a certain period of time in the order of step 3 → step 4 → step 5 → step 4 → step 3 → step 4 → step 5 → step 4.

[0023] Specifically, the first, second, third, and fourth electrodes are operated in an RF+EMS mode instead of the first RF mode, and the RF+EMS mode may be divided into steps 6, 7, and 8, in which the second RF mode is performed on any two of the first, second, third, and fourth electrodes, and the second EMS mode is performed on the other two electrodes.

[0024] Specifically, in step 6, the first and second electrodes are operated in the second RF mode, and the third and fourth electrodes are operated in the second EMS mode; in step 7, the second and third electrodes are operated in the second RF mode, and the first and fourth electrodes are operated in the second EMS mode; and in step 8, the third and fourth electrodes are operated in the second RF mode, and the first and second electrodes are operated in the second EMS mode.

[0025] Specifically, the second RF mode sets the frequency used for the first, second, third, and fourth electrodes to four frequencies in the range of 1 MHz to 3 MHz (high frequency), and the four frequencies are set to the first frequency, second frequency, third frequency, and fourth frequency in order from longest to shortest frequency, and the second EMS mode can set the frequency used for the first, second, third, and fourth electrodes to one fifth frequency in the low frequency range.

[0026] Specifically, the device further includes an acceleration mode for rapid heat transfer to the skin before the activation of the second RF mode, and the acceleration mode is activated by selecting any one of acceleration level 1, acceleration level 2, and acceleration level 3, which are set in order from shortest to longest acceleration time, and the current of the first frequency is supplied to the third and fourth electrodes with a duty of 100%, and a negative current is applied to one of the third and fourth electrodes and a positive current is applied to the other electrode.

[0027] Specifically, in the second RF mode, in step 6, currents of the first frequency and the second frequency are alternately applied to each of the first and second electrodes several times to several tens of times in a cycle of less than one second during a first set time; in step 7, currents of the second frequency and the third frequency are alternately applied to each of the second and third electrodes several times to several tens of times in a cycle of less than one second during the first set time; and in step 8, currents of the third frequency and the fourth frequency are alternately applied to each of the third and fourth electrodes several times to several tens of times in a cycle of less than one second during the first set time; and a negative current is applied to one of the two first and second electrodes, the two second and third electrodes, or the two third and fourth electrodes; A positive current is applied to the other electrode. The steps 6, 7, and 8 are alternately executed with a gap of a second set time during which no current is supplied to each of the first, second, third, and fourth electrodes, and the first set time becomes longer as the acceleration level increases from the acceleration level 1 to the acceleration level 3, and the second set time becomes relatively shorter as the acceleration level increases from the acceleration level 1 to the acceleration level 3. In the second EMS mode, in step 6, a current of the fifth frequency is applied to each of the third and fourth electrodes, in step 7, a current of the fifth frequency is applied to each of the first and fourth electrodes, and in step 8, a current of the fifth frequency is applied to each of the first and second electrodes, and a negative current is applied to one of the two third and fourth electrodes, the two first and fourth electrodes, or the two first and second electrodes, and a positive current is applied to the other electrode.

[0028] Specifically, the second EMS mode is executed by selecting one of stimulation levels 1, 2, and 3, which are set in order from shortest to longest so that the stimulation time is different in each of steps 6, 7, and 8, and current can be prevented from being supplied to each of the first, second, third, and fourth electrodes for a certain period of time between steps 6, 7, and 8.

[0029] Specifically, the RF+EMS mode can be repeatedly executed for a certain period of time in the second RF mode and the second EMS mode in the order of step 6 → step 7 → step 8 → step 7 → step 6 → step 7 → step 8 → step 7. [Effects of the Invention]

[0030] The skin management device according to the present invention applies different frequencies to multiple electrodes in alternating fashion at a set period, thereby enabling high-frequency thermal energy to be evenly transferred from the upper dermis to the lower dermis in RF mode, thereby maximizing the skin improvement effect.

[0031] In addition, the skin care device according to the present invention has a passageway for cosmetics (formulation) formed in the innermost electrode among the multiple electrodes, so that the cosmetics can be spread evenly along the passageway onto the electrode during use.

[0032] In addition, the skin care device according to the present invention does not form a movement path in the outermost electrode among the plurality of electrodes, thereby allowing the cosmetics to be spread evenly only inside the head portion during use.

[0033] In addition, the skin care device according to the present invention uses high and low frequencies in combination in multiple electrodes, allowing high frequency thermal energy to be transmitted evenly from the upper to lower dermis layers through the electrodes operating in RF mode, and eliminating muscle pain and activating muscles through the electrodes operating in EMS (Electrical Muscle Stimulation) mode, thereby further maximizing the skin improvement effect.

[0034] In addition, the skin care device according to the present invention can provide light of various wavelength bands to the user's skin through the light emitting element, thereby maximizing cosmetic effects such as inducing collagen formation in the user's skin and reducing fine wrinkles, as well as providing therapeutic effects such as soothing the area where light of various wavelength bands is applied and alleviating inflammation that has formed.

[0035] In addition, the skin management device according to the present invention has a head unit equipped with multiple electrodes that can be detached from the main body, so that if the head unit is damaged or malfunctions, only the head unit can be replaced, resulting in high efficiency.If a user wants to use additional functions other than those included in the head unit that is equipped, the user can connect the head unit that includes the additional functions to the main body and use it, without having to purchase or install a separate skin management device for the additional functions, allowing the user to use the skin management device economically and efficiently.

[0036] In addition, the skin management device according to the present invention is capable of supplying not only high-frequency / low-frequency currents but also at least one current selected from galvanic current and weak current to multiple electrodes, thereby generating deep heat within the user's skin, activating muscles, promoting the production of adenosine triphosphate (ATP), and effectively delivering cosmetics or drugs into the skin.

[0037] In addition, the skin management device according to the present invention has a curved surface on the head where the multiple electrodes come into contact with the user's skin, allowing it to effectively adhere to relatively curved areas such as the chin, cheeks, and corners of the eyes, and the multiple electrodes can effectively contact the skin without being separated from the skin, allowing it to effectively massage the user's skin. [Brief explanation of the drawings]

[0038] [Figure 1] 1 is a perspective view of a skin management device according to an embodiment of the present invention.

[0039] [Figure 2] 1 is an exploded perspective view of a skin management device according to an embodiment of the present invention.

[0040] [Figure 3] FIG. 2 is a rear perspective view of a head unit in a skin management device according to an embodiment of the present invention.

[0041] [Figure 4] FIG. 2 is a front view of a head unit in the skin management device according to an embodiment of the present invention.

[0042] [Figure 5] 5 is a cross-sectional view of the head portion taken along line AA' in FIG. 4.

[0043] [Figure 6] 1 is an exploded perspective view of a head portion of a skin management device according to an embodiment of the present invention.

[0044] [Figure 7] FIG. 1 is a first perspective view of an electrode unit in a skin management device according to an embodiment of the present invention.

[0045] [Figure 8] FIG. 2 is a second perspective view of the electrode unit in the skin management device according to an embodiment of the present invention.

[0046] [Figure 9] FIG. 2 is an exploded perspective view of an electrode unit in the skin management device according to an embodiment of the present invention.

[0047] [Figure 10] FIG. 2 is a front view of a cover of a housing in a skin management device according to an embodiment of the present invention.

[0048] [Figure 11] FIGS. 11(a) and 11(b) are diagrams showing a comparison of the transfer of thermal energy to the dermis layer in the skin care device of the present invention and the skin care device of the comparative invention. DETAILED DESCRIPTION OF THE INVENTION

[0049] The objectives, particular advantages, and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. It should be noted that, in this specification, when referring to components in each drawing, the same components have been given the same numbers as far as possible, even if they appear in different drawings. Furthermore, when describing the present invention, if it is determined that a detailed description of related publicly known technology may unnecessarily obscure the gist of the present invention, such a detailed description will be omitted.

[0050] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0051] FIG. 1 is a perspective view of a skin management device according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of a skin management device according to one embodiment of the present invention, and FIG. 3 is a rear perspective view of a head portion of a skin management device according to one embodiment of the present invention.

[0052] 1 to 3, a skin management device 1 according to an embodiment of the present invention may include a main body 2 and a head unit 3.

[0053] The main body 2 may have a shape that is easy for a user to hold in his / her hand and may be connected to the head unit 3. The main body 2 may have a shape that extends in one direction. For example, the main body 2 may have a shape that extends vertically. The main body 2 may have a bar or stick shape that extends in one direction, such as a cylinder or polygonal prism. This allows the user to control the position of the skin management device 1 by holding the main body 2 in his / her hand.

[0054] The main body 2 may include a front cover 21, a rear cover 22, and a recess 23. The main body 2 may have an internal storage space formed by the front cover 21 and the rear cover 22.2 Various elements for operating the skin management device 1, such as a battery 24, a charging terminal 25, a switch 26, a function button 27, an indicator lamp 28, and a first terminal 29, can be arranged in the storage space.

[0055] The recess 23 may be provided on one side of an upper portion of the front cover 21 of the main body 2. The recess 23 may have a shape recessed toward the inside of the main body 2 on one side of the front cover 21 of the main body 2, and may be configured to allow the head unit 3 to be detachable.

[0056] The battery 24 can supply power to the skin management device 1. For example, the battery 24 can supply power to both the main body 2 and the head unit 3 connected to the main body 2. The battery 24 can include one selected from a primary battery such as a manganese (Mn) battery, an alkaline battery, a mercury battery, or a silver oxide battery. The battery 24 can also include one selected from a secondary battery such as a nickel-cadmium (Ni-Cd) battery, a nickel-metal hydride (Ni-MH) battery, or a lithium-ion (Li-ion) battery.

[0057] If the skin management device 1 includes a rechargeable battery 24, a cover for attaching and detaching the battery 24 may be disposed on the rear cover 22 of the main body 2. Alternatively, if the battery 24 is disposed inside the main body 2 and is difficult to attach and detach, a charging terminal 25 may be provided on the rear cover 22 of the skin management device 1. The charging terminal 25 may be electrically connected to the battery 24 disposed inside the main body 2, and a portion of the charging terminal 25 may be exposed to the outside of the rear cover 22 of the main body 2. A user can charge the battery 24 by connecting a USB port, cable, etc. for charging the battery 24 to the exposed charging terminal 25. Alternatively, the skin management device 1 may be provided to be wirelessly rechargeable. Specifically, the skin management device 1 may be provided to be wirelessly rechargeable using a coil, etc., disposed inside the main body 2. For example, the skin management device 1 may charge the battery 24 using a wireless charging method such as a magnetic resonance method or a magnetic induction method.

[0058] The switch 26 may be installed so as to partially protrude from the outside of the front cover 21 of the main body 2, and the installation position is not limited, and it may be installed at any position where the user can conveniently operate it. The switch 26 may be a physical switch including an elastic body such as a spring. Alternatively, the switch 26 may be an electrical switch formed with a touch electrode or the like. The user can turn the operation of the skin management device 1 on / off via the switch 26.

[0059] The function button 27 may be installed so as to partially protrude from the outside of the front cover 21 of the main body 2, and the installation position is not limited, and it may be installed at any position that is convenient for the user to operate. The function button 27 can select functions of the skin management device 1. For example, the function button 27 can select functions such as the first RF mode, the first EMS mode, the RF+EMS mode, and the light-emitting mode.

[0060] The indicator lamp 28 may be installed so as to be partially exposed on the outside of the front cover 21 of the main body 2. For example, the indicator lamp 28 may be arranged adjacent to the switch 26 and / or the function button 27, and may display the current state of the skin management device 1, such as the switching state of the skin management device 1 or the functional state of the first RF mode, the first EMS mode, the light-emitting mode, etc.

[0061] The first terminal 29 may be electrically connected to the battery 24. The first terminal 29 may be electrically connected to the second terminal 34 of the head portion 3 coupled thereto via the recess 23.

[0062] The head unit 3 can be connected to the main body 2, and the head unit 3 can be physically connected to the main body 2. For example, the head unit 3 can have a shape corresponding to a recess 23 provided in the front cover 21 of the main body 2, and can be inserted to a predetermined depth into such recess 23 and connected thereto. The head unit 3 can be configured to be detachable from the main body 2.

[0063] The head unit 3 may also be electrically connected to the main body 2. For example, the head unit 3 may have a second terminal 34 on its underside, which may be electrically connected to a first terminal 29 provided in the internal storage space of the main body 2. This allows the battery 24 disposed within the main body 2 to supply power to the head unit 3.

[0064] The head unit 3 will be described in detail below with reference to FIGS.

[0065] Figure 4 is a front view of the head unit in a skin management device according to one embodiment of the present invention, Figure 5 is a cross-sectional view of the head unit cut along line A-A' in Figure 4, Figure 6 is an exploded oblique view of the head unit in a skin management device according to one embodiment of the present invention, Figure 7 is a first oblique view of the electrode unit in a skin management device according to one embodiment of the present invention, Figure 8 is a second oblique view of the electrode unit in a skin management device according to one embodiment of the present invention, Figure 9 is an exploded oblique view of the electrode unit in a skin management device according to one embodiment of the present invention, and Figure 10 is a front view of the housing cover in a skin management device according to one embodiment of the present invention.

[0066] The head unit 3 can include a housing 31 , a substrate 32 , a light-emitting element 33 , a second terminal 34 , and an electrode unit 35 .

[0067] The housing 31 may be composed of a frame 311 and a cover 312 that covers the upper part of the frame 311, thereby leaving the lower part open and providing an accommodation space therein. The accommodation space of the housing 31 may accommodate a substrate 32, a light emitting element 33, a second terminal 34, and an electrode unit 35. The frame 311 may be formed to a size that allows the edges of the substrate 32 and the electrode unit 35 to be fixed.

[0068] The cover 312 may be provided on the upper part of the frame 311. The cover 312 may be translucent or opaque and may include a material that transmits light emitted from the light emitting device 33. The cover 312 may also include a material that is lightweight and can prevent damage from external impact or contact. For example, the cover 312 may include at least one of materials such as resin, ceramic, and metal, and may transmit light emitted from the light emitting device 33 while having improved reliability against the external environment.

[0069] The cover 312 may have a structure that allows it to be coupled to and separated from the frame 311. However, the embodiment is not limited thereto, and it goes without saying that the cover 312 and the frame 311 may be integrally formed.

[0070] As described above, the housing 31, which is made up of the frame 311 and the cover 312, may include a plurality of holes 313a, 313b, 313c, 313d, 313e, 313f, and 313g so that a portion of the holes is exposed to the outside when the electrode unit 35 is housed therein. The plurality of holes 313a, 313b, 313c, 313d, 313e, 313f, and 313g are components related to the electrode unit 35, and will be described below together with the electrode unit 35.

[0071] A substrate 32 may be accommodated within the housing 31. A plurality of light emitting elements 33 may be disposed on an upper portion of the substrate 32, and a second terminal 34 electrically connected to the first terminal 29 of the body 2 may be provided on a lower portion of the substrate 32.

[0072] The plurality of light emitting elements 33 may be electrically connected to the substrate 32. The plurality of light emitting elements 33 may be disposed on an upper surface of the substrate 32. The plurality of light emitting elements 33 may be disposed in an edge region of the substrate 32.

[0073] When a light-emitting mode is selected by the function button 27, the plurality of light-emitting elements 33 can emit light in the visible light band. Specifically, the plurality of light-emitting elements 33 are visible light-emitting elements that can emit light with a wavelength of about 400 nm or more. For example, the plurality of light-emitting elements 33 can emit light in at least one of the following wavelength bands: green light in the wavelength band of about 450 nm to about 580 nm, orange light in the wavelength band of about 590 nm to about 620 nm, and red light in the wavelength band of about 620 nm to about 750 nm.

[0074] In this embodiment, the light-emitting mode can be used alone or in parallel with the first RF mode, the first EMS mode, or the RF+EMS mode. The skin management device 1 of the present invention can be configured to operate the light-emitting mode together with the first RF mode, the first EMS mode, or the RF+EMS mode.

[0075] The electrode unit 35 may be accommodated inside the housing 31. The electrode unit 35 may be disposed on the substrate 32. The electrode unit 35 may include a material that is harmless to the human body. Specifically, the electrode unit 35 may include a metal material that is conductive and does not deform when contacted with the skin. For example, the electrode unit 35 may include at least one metal selected from aluminum (Al), copper (Cu), zinc (Zn), iron (Fe), nickel (Ni), chromium (Cr), silver (Ag), gold (Au), platinum (Pt), stainless steel (SUS), and alloys thereof.

[0076] The electrode unit 35 is electrically connected to the substrate 32 and can be in contact with the user's skin. The electrode unit 35 can provide at least one of high-frequency / low-frequency current, galvanic current, and weak current to the user's skin.

[0077] The electrode unit 35 may include a plurality of electrodes 351a, 351b, 351c, and 351d. For example, the electrode unit 35 may include a first electrode 351a, a second electrode 351b, a third electrode 351c, and a fourth electrode 351d that are spaced apart from one another.

[0078] The first electrode 351a can be positioned in the center of the head portion 3, the second electrode 351b can be wrapped around the first electrode 351a and spaced apart at equal intervals, the third electrode 351c can be wrapped around the second electrode 351b and spaced apart at equal intervals, and the fourth electrode 351d can be wrapped around the third electrode 351c and spaced apart at equal intervals.

[0079] The first electrode 351a may have a planar shape of a half square ring, but is not limited thereto and may be variously shaped, such as a ring shape or a doughnut shape. The first electrode 351a may be formed to a first width and a first height, and may have an inverted U-shaped cross section. This reduces the weight of the first electrode 351a, and further reduces the overall weight and manufacturing cost of the head unit 3.

[0080] The first electrode 351a may include a first contact portion 352a and a second contact portion 352b exposed to the outside of the head portion 3. The first contact portion 352a and the second contact portion 352b may be electrodes that come into contact with the user's skin.

[0081] The first contact portion 352a and the second contact portion 352b may have shapes corresponding to each other. For example, the first contact portion 352a and the second contact portion 352b may have an inverted U-shaped cross section.

[0082] The first contact portion 352a and the second contact portion 352b may face each other and be spaced apart in a first direction (horizontal direction), and may be symmetrical to each other with respect to an imaginary line in a second direction (vertical direction).

[0083] The first contact portion 352a and the second contact portion 352b may include an upper surface that faces and contacts the user's skin. The upper surface of each of the first contact portion 352a and the second contact portion 352b may be positioned higher than the upper surface of the cover 312 of the housing 31. This allows the first contact portion 352a and the second contact portion 352b to come into contact with the user's skin and provide at least one of a high-frequency / low-frequency current, a galvanic current, and a weak current to the skin.

[0084] The first electrode 351a may further include a first connecting portion 353a and a second connecting portion 353b. The first connecting portion 353a and the second connecting portion 353b may be disposed on both ends of the first contact portion 352a and the second contact portion 352b, respectively, and may connect the first contact portion 352a and the second contact portion 352b.

[0085] The first connecting portion 353a and the second connecting portion 353b may have corresponding shapes. For example, the first connecting portion 353a and the second connecting portion 353b may face each other and be spaced apart in the second direction (vertical direction). In addition, the first connecting portion 353a and the second connecting portion 353b may be symmetrical with respect to an imaginary line in the first direction (horizontal direction).

[0086] The first connecting portion 353a and the second connecting portion 353b may not be exposed to the outside of the head unit 3. For example, the first connecting portion 353a and the second connecting portion 353b may be bent and extended from both ends of the first contact portion 352a and the second contact portion 352b toward the substrate 32.

[0087] The first and second connecting portions 353a and 353b may have a height lower than the first and second contact portions 352a and 352b. The upper surfaces of the first and second connecting portions 353a and 353b may be disposed lower than the upper surface of the cover 312. The first and second connecting portions 353a and 353b may be recessed at both ends of the first and second contact portions 352a and 352b, respectively.

[0088] Such first connecting portion 353a and second connecting portion 353b can provide a passageway for the cosmetics (formulation) to move, and during use, the cosmetics can be spread evenly over the first electrode 351a along the first connecting portion 353a and second connecting portion 353b.

[0089] Furthermore, the embodiment may include a first contact portion 354a connecting the first electrode 351a and the substrate 32. The first contact portion 354a may extend toward the substrate 32 in at least one configuration of a first contact portion 352a, a second contact portion 352b, a first connecting portion 353a, and a second connecting portion 353b, allowing a set current to be applied to the first electrode 351a.

[0090] The second electrode 351b may have a shape corresponding to the first electrode 351a. For example, the second electrode 351b may have a planar shape of a half square ring, but is not limited thereto and may be various other shapes such as a ring shape or a doughnut shape. The second electrode 351b may have a second width and a second height and may have an inverted U-shaped cross section. This reduces the weight of the second electrode 351b, and further reduces the overall weight and manufacturing cost of the head unit 3.

[0091] The second electrode 351b may include a third contact portion 352c and a fourth contact portion 352d exposed to the outside of the head portion 3. The third contact portion 352c and the fourth contact portion 352d may be electrodes that come into contact with the user's skin.

[0092] The third contact portion 352c and the fourth contact portion 352d may have shapes corresponding to each other. For example, the third contact portion 352c and the fourth contact portion 352d may have an inverted U-shaped cross section.

[0093] The third contact portion 352c and the fourth contact portion 352d may face each other and be spaced apart in the first direction (horizontal direction), and may be symmetrical to each other with respect to an imaginary line in the second direction (vertical direction).

[0094] The third contact portion 352c and the fourth contact portion 352d may include an upper surface that faces and contacts the user's skin. The upper surfaces of the third contact portion 352c and the fourth contact portion 352d may be positioned higher than the upper surface of the cover 312 of the housing 31. This allows the third contact portion 352c and the fourth contact portion 352d to come into contact with the user's skin and provide at least one of a high-frequency / low-frequency current, a galvanic current, and a weak current to the skin.

[0095] The second electrode 351b may further include a third connecting portion 353c and a fourth connecting portion 353d. The third connecting portion 353c and the fourth connecting portion 353d may be disposed on both ends of the third contact portion 352c and the fourth contact portion 352d, respectively, and may connect the third contact portion 352c and the fourth contact portion 352d.

[0096] The third connecting portion 353c and the fourth connecting portion 353d may have corresponding shapes. For example, the third connecting portion 353c and the fourth connecting portion 353d may face each other and be spaced apart in the second direction (vertical direction). In addition, the third connecting portion 353c and the fourth connecting portion 353d may be symmetrical with respect to an imaginary line in the first direction (horizontal direction).

[0097] The third connecting portion 353c and the fourth connecting portion 353d may not be exposed to the outside of the head portion 3. For example, the third connecting portion 353c and the fourth connecting portion 353d may be bent and extended from both ends of the third contact portion 352c and the fourth contact portion 352d toward the substrate 32.

[0098] The third connecting portion 353c and the fourth connecting portion 353d may have a height lower than the third contact portion 352c and the fourth contact portion 352d. The upper surfaces of the third connecting portion 353c and the fourth connecting portion 353d may be disposed lower than the upper surface of the cover 312. The third connecting portion 353c and the fourth connecting portion 353d may be recessed at both ends of the third contact portion 352c and the fourth contact portion 352d, respectively.

[0099] Such third connecting portion 353c and fourth connecting portion 353d can provide a passageway for the cosmetics (formulation) to move, and during use, the cosmetics can be spread evenly over the second electrode 351b along the third connecting portion 353c and fourth connecting portion 353d.

[0100] Furthermore, the embodiment may include a second contact portion 354b connecting the second electrode 351b and the substrate 32. The second contact portion 354b may extend toward the substrate 32 in the form of at least one of the third contact portion 352c, the fourth contact portion 352d, the third connecting portion 353c, and the fourth connecting portion 353d, allowing a set current to be applied to the second electrode 351b.

[0101] The third electrode 351c may have a shape corresponding to the second electrode 351b. For example, the third electrode 351c may have a planar shape of a half square ring, but is not limited thereto and may be various other shapes such as a ring shape or a doughnut shape. The third electrode 351c may have a third width and a third height and may have an inverted U-shaped cross section. This reduces the weight of the third electrode 351c, and further reduces the overall weight and manufacturing cost of the head unit 3.

[0102] The third electrode 351c may include a fifth contact portion 352e and a sixth contact portion 352f exposed to the outside of the head portion 3. The fifth contact portion 352e and the sixth contact portion 352f may be electrodes that come into contact with the user's skin.

[0103] The fifth contact portion 352e and the sixth contact portion 352f may have shapes corresponding to each other. For example, the fifth contact portion 352e and the sixth contact portion 352f may have an inverted U-shaped cross section.

[0104] The fifth contact portion 352e and the sixth contact portion 352f may face each other and be spaced apart in the first direction (horizontal direction), and may be symmetrical to each other with respect to an imaginary line in the second direction (vertical direction).

[0105] The fifth contact portion 352e and the sixth contact portion 352f may include an upper surface that faces and contacts the user's skin. The upper surfaces of the fifth contact portion 352e and the sixth contact portion 352f may be positioned higher than the upper surface of the cover 312 of the housing 31. This allows the fifth contact portion 352e and the sixth contact portion 352f to come into contact with the user's skin and provide at least one of a high-frequency / low-frequency current, a galvanic current, and a weak current to the skin.

[0106] The third electrode 351c may further include a fifth connecting portion 353e and a sixth connecting portion 353f. The fifth connecting portion 353e and the sixth connecting portion 353f may be disposed on both ends of the fifth contact portion 352e and the sixth contact portion 352f, respectively, and may connect the fifth contact portion 352e and the sixth contact portion 352f.

[0107] The fifth connecting portion 353e and the sixth connecting portion 353f may have corresponding shapes. For example, the fifth connecting portion 353e and the sixth connecting portion 353f may face each other and be spaced apart in the second direction (vertical direction). In addition, the fifth connecting portion 353e and the sixth connecting portion 353f may be symmetrical with respect to an imaginary line in the first direction (horizontal direction).

[0108] The fifth connecting portion 353e and the sixth connecting portion 353f may not be exposed to the outside of the head unit 3. For example, the fifth connecting portion 353e and the sixth connecting portion 353f may have a shape in which both ends of the fifth contact portion 352e and the sixth contact portion 352f are bent and extended toward the substrate 32.

[0109] The fifth connecting portion 353e and the sixth connecting portion 353f may have a height lower than the fifth contact portion 352e and the sixth contact portion 352f. The upper surfaces of the fifth connecting portion 353e and the sixth connecting portion 353f may be disposed lower than the upper surface of the cover 312. The fifth connecting portion 353e and the sixth connecting portion 353f may be provided in a concave shape at both ends of the fifth contact portion 352e and the sixth contact portion 352f, respectively.

[0110] Such fifth connecting portion 353e and sixth connecting portion 353f can provide a passageway for the cosmetics (formulation) to move, and during use, the cosmetics can be spread evenly over the third electrode 351c along the fifth connecting portion 353e and sixth connecting portion 353f.

[0111] Furthermore, the embodiment may include a third contact portion 354c connecting the third electrode 351c and the substrate 32. The third contact portion 354c may extend toward the substrate 32 in the form of at least one of a fifth contact portion 352e, a sixth contact portion 352f, a fifth connecting portion 353e, and a sixth connecting portion 353f, allowing a set current to be applied to the third electrode 351c.

[0112] The fourth electrode 351d may have a shape corresponding to the third electrode 351c. For example, the fourth electrode 351d may have a planar shape of a half square ring, but is not limited thereto and may be various other shapes such as a ring shape or a doughnut shape. The fourth electrode 351d may have a fourth width and a fourth height and may have an inverted U-shaped cross section. This reduces the weight of the fourth electrode 351d, and further reduces the overall weight and manufacturing costs of the head unit 3.

[0113] In this embodiment, the fourth electrode 351d differs from the first, second, and third electrodes 351a, 351b, and 351c described above in that the connecting portions 353a, 353b, 353c, 353d, 353e, and 353f are omitted and the fourth electrode 351d has one common seventh contact portion 352g.

[0114] The fourth electrode 351d may include a seventh contact portion 352g exposed to the outside of the head portion 3. The seventh contact portion 352g may be an electrode that comes into contact with the user's skin.

[0115] The seventh contact portion 352g may have an inverted U-shaped cross section.

[0116] The seventh contact portion 352g may include an upper surface that faces and contacts the user's skin. The upper surface of the seventh contact portion 352g may be positioned higher than the upper surface of the cover 312 of the housing 31. This allows the seventh contact portion 352g to come into contact with the user's skin and provide at least one of a high-frequency / low-frequency current, a galvanic current, and a weak current to the skin.

[0117] As described above, the fourth electrode 351d of this embodiment differs from the first, second, and third electrodes 351a, 351b, and 351c described above in that it does not have connecting portions 353a, 353b, 353c, 353d, 353e, and 353f that provide passageways for the cosmetics, thereby allowing the cosmetics to be spread evenly only inside the head portion 3 during use.

[0118] Furthermore, this embodiment may include a fourth contact portion 354e connecting the fourth electrode 351d and the substrate 32. At least one of the fourth contact portions 354e may extend toward the substrate 32 from the seventh contact portion 352g, allowing a set current to be applied to the fourth electrode 351d.

[0119] In this embodiment, the first width of the first electrode 351a, the second width of the second electrode 351b, the third width of the third electrode 351c, and the fourth width of the fourth electrode 351d may be the same or similar to each other.

[0120] However, in this embodiment, the first height of the first electrode 351a, the second height of the second electrode 351b, the third height of the third electrode 351c, and the fourth height of the fourth electrode 351d may be the same or similar, but it is preferable to form them to be different for the following reasons.

[0121] For example, the first height of the first electrode 351a arranged in the center of the head part 3 based on the horizontal plane may be the highest, and the fourth height of the fourth electrode 351d arranged on the outermost edge of the head part 3 may be the lowest.

[0122] For example, the difference in height between adjacent electrodes among the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d may be in the range of 5% to 25%. Preferably, the difference in height between adjacent electrodes among the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d may be in the range of 5% to 20%. More preferably, the difference in height between adjacent electrodes among the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d may be in the range of 5% to 15%.

[0123] If the difference in height between adjacent electrodes among the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d exceeds approximately 25% or is less than approximately 5%, the contact characteristics between the user's skin and the contact portions 352a, 352b, 352c, 352d, 352e, 352f, and 352g may be degraded. As an example, the user's skin area is divided into flat skin areas and curved skin areas such as the cheeks, chin, and corners of the eyes. If the difference in height between adjacent electrodes among the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d exceeds approximately 25%, the contact characteristics of contact portions 352a, 352b, 352c, 352d, 352e, 352f, and 352g are reduced in the flat skin areas, and if the difference in height is less than approximately 5%, the contact characteristics of contact portions 352a, 352b, 352c, 352d, 352e, 352f, and 352g are reduced in the curved skin areas. Furthermore, when the difference in height between adjacent electrodes among the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d exceeded approximately 25%, a phenomenon occurred in which cosmetics or medications placed between the head unit 3 and the user's skin migrated to the edge area of ​​the head unit 3 or to the central area of ​​the head unit 3.

[0124] As mentioned above, the housing 31 consisting of the frame 311 and the cover 312 may include a plurality of holes 313a, 313b, 313c, 313d, 313e, 313f, and 313g so that a portion of the electrode part 35 is exposed to the outside when it is housed.

[0125] The cover 312 may include first and second holes 313a and 313b formed in areas corresponding to the first and second contact portions 352a and 352b of the first electrode 351a, respectively, third and fourth holes 313c and 313d formed in areas corresponding to the third and fourth contact portions 352c and 352d of the second electrode 351b, respectively, fifth and sixth holes 313e and 313f formed in areas corresponding to the fifth and sixth contact portions 352e and 352f of the third electrode 351c, respectively, and a seventh hole 313g formed in an area corresponding to the seventh contact portion 352g of the fourth electrode 351d.

[0126] Specifically, the first and second holes 313a and 313b may be disposed in regions vertically overlapping the first and second contact portions 352a and 352b, respectively, and may have shapes corresponding to the first and second contact portions 352a and 352b. A portion of the first electrode 351a, for example, a portion of the first contact portion 352a, may be inserted into the first hole 313a, and a portion of the first electrode 351a, for example, a portion of the second contact portion 352b, may be inserted into the second hole 313b.

[0127] At this time, a portion of each of the first and second contact portions 352a, 352b is positioned at the bottom of the cover 312, and the remaining portion of each of the first and second contact portions 352a, 352b protrudes from the top surface of the cover 312 and can come into contact with the user's skin.

[0128] The third and fourth holes 313c and 313d may be disposed in regions vertically overlapping the third and fourth contact portions 352c and 352d, respectively, and may have shapes corresponding to the third and fourth contact portions 352c and 352d. A portion of the second electrode 351b, for example, a portion of the third contact portion 352c, may be inserted into the third hole 313c, and a portion of the second electrode 351b, for example, a portion of the fourth contact portion 352d, may be inserted into the fourth hole 313d.

[0129] In this case, a portion of each of the third and fourth contact portions 352c and 352d is positioned at the bottom of the cover 312, and the remaining portion of each of the third and fourth contact portions 352c and 352d protrudes from the top surface of the cover 312 and can come into contact with the user's skin.

[0130] The fifth and sixth holes 313e and 313f may be disposed in regions vertically overlapping the fifth and sixth contact portions 352e and 352f, respectively, and may have shapes corresponding to the fifth and sixth contact portions 352e and 352f. A part of the third electrode 351c, for example, a part of the fifth contact portion 352e, may be inserted and disposed in the fifth hole 313e, and a part of the third electrode 351c, for example, a part of the sixth contact portion 352f, may be inserted and disposed in the sixth hole 313f.

[0131] At this time, a portion of each of the fifth and sixth contact portions 352e, 352f is positioned at the bottom of the cover 312, and the remaining portion of each of the fifth and sixth contact portions 352e, 352f protrudes from the top surface of the cover 312 and can come into contact with the user's skin.

[0132] The seventh hole 313g may be disposed in a region vertically overlapping with the seventh contact portion 352g and may have a shape corresponding to the seventh contact portion 352g. A part of the fourth electrode 351d, for example, a part of the seventh contact portion 352g, may be inserted and disposed in the seventh hole 313g.

[0133] At this time, a portion of the seventh contact portion 352g is disposed below the cover 312, and the remaining portion of the seventh contact portion 352g protrudes from the upper surface of the cover 312 and can come into contact with the user's skin.

[0134] The skin management device 1 of this embodiment configured as described above has a plurality of first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d. The first, second, and third electrodes 351a, 351b, and 351c are disposed inside the head portion 3. toBy forming the first to sixth connecting parts 353a, 353b, 353c, 353d, 353e, and 353f as cosmetic passageways, the cosmetics can be spread evenly along the passageways to all electrodes 351a, 351b, 351c, and 351d during use, and by not forming a connecting part as a passageway for the fourth electrode 351d, which is located at the outermost edge of the head part 3, the cosmetics can be spread evenly only inside the head part during use.

[0135] In addition, the skin management device 1 of this embodiment applies different frequencies to the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d alternately at a set cycle, thereby enabling high-frequency thermal energy to be transmitted evenly from the upper dermis to the lower dermis in the first RF mode, and enabling muscle pain to be relieved and muscles to be activated by the low-frequency massage function in the EMS (Electrical Muscle Stimulation) mode.

[0136] The skin management device 1 according to the present invention can be operated in an acceleration mode, a first RF mode, a first EMS mode, or an RF+EMS mode by applying a current of a selected frequency to at least two selected electrodes from the plurality of first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d, as will be described with reference to Table 1 below. Here, the acceleration mode can be included in the first RF mode. In this embodiment, it should be clear that the term 'acceleration' is used in the concept of quickly raising the skin temperature to a certain level while using the skin management device. Under this concept, the acceleration mode is a frequency (first frequency; 2.2M, which will be described later) that can heat the user's skin most quickly at a duty of 100% for a certain period of time prior to the frequency alternation of the basic operation, in order to quickly eliminate the coldness felt when the skin comes into contact with metal and cosmetics during initial use, and to provide the user's skin with a rapid warmth sensation and deep heat transfer. H z) is applied to the boosting section.

[0137] [Table 1]

[0138] The depth to which high-frequency waves penetrate into the skin varies depending on the wavelength. Therefore, in the skin management device 1 of this embodiment, the frequencies used by the four first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d can be set to four frequencies in the range of 1 MHz to 3 MHz (high frequency) so that deep heat can be applied from the upper dermis to the lower dermis in the first RF mode. The four frequencies can be set to the first frequency, the second frequency, the third frequency, and the fourth frequency in order from longest to shortest. For example, the first frequency can be set to 2.2 MHz, the second frequency to 1.8 MHz, the third frequency to 1.4 MHz, and the fourth frequency to 1.0 MHz, but are not limited thereto.

[0139] The first, second, third and fourth frequencies can be selectively applied in the acceleration mode for rapid temperature rise and the first RF mode for massaging with the head part 3.

[0140] The acceleration mode quickly raises the skin temperature to a certain level while using the device, improving the speed at which deep heat is felt.

[0141] The acceleration mode can be activated by the user selecting one of acceleration level 1, acceleration level 2, and acceleration level 3 using function button 27. Acceleration level 1, acceleration level 2, and acceleration level 3 can be set in order of acceleration time from shortest to longest. For example, acceleration level 1 can be set to 5 seconds, acceleration level 2 to 10 seconds, and acceleration level 3 to 15 seconds.

[0142] In the acceleration mode, the head unit 3 can be accelerated by supplying a current to the third and fourth electrodes 351c and 351d, which are arranged on the outside of the electrode unit 35, among the first, second, third and fourth electrodes 351a, 351b, 351c and 351d. At this time, the third and fourth electrodes 351c and 351d are supplied with the first frequency (2.2 MHz), which is the highest frequency, so as to achieve a faster temperature rise rate than the target. H z) can be supplied with a duty of 100%.

[0143] In the above, the first frequency (2.2M H Of the third and fourth electrodes 351c and 351d to which the current z) is applied, a negative current may be applied to one electrode and a positive current may be applied to the other electrode. For example, a negative current may be applied to the third electrode 351c and a positive current may be applied to the fourth electrode 351d.

[0144] The first RF mode may be automatically executed for a certain time period from the time the acceleration mode is completed, and the execution may be automatically interrupted after the certain time period has elapsed.

[0145] The first RF mode can be divided into step 1 and step 2, in which currents of any two of the first, second, third, and fourth frequencies are alternately applied to any two of the four first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d at a set period, while no current is supplied to the other two electrodes.

[0146] For example, in step 1, currents of the second frequency (1.8 MHz) and the fourth frequency (1.0 MHz) may be applied alternately to the first electrode 351a and the second electrode 351b in a cycle of less than one second, and in step 2, currents of the first frequency (2.2 MHz) and the third frequency (1.4 MHz) may be applied alternately to the third electrode 351c and the fourth electrode 351d in a cycle of less than one second. The alternating cycle may be 1 to 999 ms (milliseconds).

[0147] In the first RF mode, when step 1 is executed, step 2 is not executed, and conversely, when step 2 is executed, step 1 is not executed. Steps 1 and 2 can be executed alternately for a set time, and when the set time is reached, the first RF mode can be automatically terminated. The execution process of steps 1 and 2 will be described in detail below.

[0148] In step 1, a current of the second frequency (1.8 MHz) and a current of the fourth frequency (1.0 MHz) can be supplied to each of the first electrode 351a and the second electrode 351b during a first set time, alternating several to several tens of times.

[0149] In the above, a negative current may be applied to one of the first and second electrodes 351a and 351b to which the currents of the second and fourth frequencies are applied, and a positive current may be applied to the other electrode. For example, a negative current may be applied to the first electrode 351a, and a positive current may be applied to the second electrode 351b.

[0150] In step 2, a current of a first frequency (2.2 MHz) and a current of a third frequency (1.4 MHz) can be supplied to each of the third electrode 351c and the fourth electrode 351d during a first set time, alternating several to several tens of times.

[0151] In the above, items 1 and 3 Zhou Of the two third and fourth electrodes 351c and 351d to which a current of a certain frequency is applied, a negative current may be applied to one electrode and a positive current may be applied to the other electrode. For example, a negative current may be applied to the third electrode 351c and a positive current may be applied to the fourth electrode 351d.

[0152] Between the above-mentioned steps 1 and 2, a current with a frequency of 0 MHz is supplied to each of the first, second, third and fourth electrodes 351a, 351b, 351c and 351d (current-off state) for a second set time.

[0153] In the above, the first set time and the second set time may vary depending on the acceleration level selected in the acceleration mode.

[0154] For example, in the acceleration mode, the third and fourth electrodes 351c and 351d are supplied with the first frequency (2.2M). H When acceleration level 1 is selected in which a current of z) is supplied for 5 seconds (s), a first set time during which step 1 or step 2 is executed can be 30 milliseconds (ms), and a second set time during which step 1 and step 2 are not executed can be 20 ms, so that an acceleration temperature corresponding to acceleration level 1 can be maintained.

[0155] In this case, the current of the second frequency (1.8 MHz) and the current of the fourth frequency (1.0 MHz) applied to the first electrode 351a and the second electrode 351b, respectively, and the current of the first frequency (2.2 MHz) and the current of the third frequency (1.4 MHz) applied to the third electrode 351c and the fourth electrode 351d, respectively, can be supplied with a duty of 60% so as to maintain an acceleration temperature corresponding to acceleration level 1, but is not limited to this.

[0156] Also, in acceleration mode, when acceleration level 2 is selected in which current of a first frequency (2.2 MHz) is supplied to the third and fourth electrodes 351c and 351d for 10 seconds (seconds), the first set time during which step 1 or step 2 is executed can be 40 ms (milliseconds), and the second set time during which step 1 and step 2 are not executed can be 10 ms (milliseconds), so as to maintain the acceleration temperature corresponding to acceleration level 2.

[0157] In this case, the current of the second frequency (1.8 MHz) and the current of the fourth frequency (1.0 MHz) applied to the first electrode 351a and the second electrode 351b, respectively, and the current of the first frequency (2.2 MHz) and the current of the third frequency (1.4 MHz) applied to the third electrode 351c and the fourth electrode 351d, respectively, can be supplied with a duty of 80% so as to maintain an acceleration temperature corresponding to acceleration level 2, but is not limited to this.

[0158] In addition, in the acceleration mode, the third and fourth electrodes 351c and 351d are supplied with the first frequency (2.2M H When acceleration level 3 is selected, in which a current of z) is supplied for 15 seconds (seconds), the first set time during which step 1 or step 2 is executed can be 45 ms (milliseconds), and the second set time during which step 1 and step 2 are not executed can be 5 ms, so as to maintain the acceleration temperature corresponding to acceleration level 3.

[0159] In this case, the current of the second frequency (1.8 MHz) and the current of the fourth frequency (1.0 MHz) applied to the first electrode 351a and the second electrode 351b, respectively, and the current of the first frequency (2.2 MHz) and the current of the third frequency (1.4 MHz) applied to the third electrode 351c and the fourth electrode 351d, respectively, can be supplied with a duty of 90% so as to maintain an acceleration temperature corresponding to acceleration level 3, but is not limited to this.

[0160] As described above, the first RF mode of the skin management device 1 can select any one of acceleration level 1, acceleration level 2, and acceleration level 3. After the acceleration mode, the first and second electrodes 351a and 351b in step 1 and the third and fourth electrodes 351c and 351d in step 2, which are executed in the first RF mode, can be repeatedly executed in a fixed order. The first RF mode can be repeatedly executed in the order of step 1 → step 2 → step 1 → step 2 for a fixed period of time. In this case, the total execution time of the first RF mode can be set to about 5 minutes for the safety of the user, but is not limited to this.

[0161] In the skin management device 1 of this embodiment, the frequency used for the four first, second, third and fourth electrodes 351a, 351b, 351c and 351d can be set to at least one fifth frequency, for example, at least one fifth frequency in the range of 150Hz (low frequency) or less, and the execution time can be set in various ways to execute the first EMS mode, in order to eliminate muscle pain and activate the muscles.

[0162] The first EMS mode can be automatically executed for a certain time from the time the acceleration mode is completed, and can be automatically interrupted after the certain time has elapsed. Of course, the first EMS mode can be executed independently of the acceleration mode.

[0163] The first EMS mode can be performed by applying a current of the fifth frequency to any two of the four first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d at a set period and not supplying current to the other two electrodes, and can be divided into steps 3, 4, and 5. In the skin management device 1 of this embodiment, the fifth frequency is set to 50 Hz, but the present invention is not limited to this.

[0164] For example, in step 3 of the first EMS mode, a current of a fifth frequency (50 Hz) can be applied to each of the third electrode 351c and the fourth electrode 351d, while no current is applied to the first electrode 351a and the second electrode 351b. In step 4 of the first EMS mode, a current of a fifth frequency (50 Hz) can be applied to each of the first electrode 351a and the fourth electrode 351d, while no current is applied to the second electrode 351b and the third electrode 351c. In step 5 of the first EMS mode, a current of a fifth frequency (50 Hz) can be applied to each of the first electrode 351a and the second electrode 351b, while no current is applied to the third electrode 351c and the fourth electrode 351d.

[0165] The fifth frequency applied in each of steps 3, 4, and 5 of the first EMS mode may be the same, but is not limited to this.

[0166] The first EMS mode described above can be executed by varying the stimulation time in each of steps 3, 4, and 5 in which the fifth frequency is applied. The first EMS mode can be activated by the user selecting one of stimulation levels 1, 2, and 3 using function button 27. Stimulation levels 1, 2, and 3 are classified according to stimulation time, with stimulation level 1 having the shortest stimulation time and stimulation level 3 having the longest stimulation time. For example, stimulation level 1 can be set to 10 μs (microseconds), stimulation level 2 to 12 μs (microseconds), and stimulation level 3 to 14 μs (microseconds), but the stimulation times are not limited thereto.

[0167] In addition, the first EMS mode supplies a current of 0 Hz frequency (current off state) to each of the first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d for a certain period of time, for example, 20 ms (milliseconds), between each of steps 3, 4, and 5.

[0168] Of the two third and fourth electrodes 351c and 351d, the two first and fourth electrodes 351a and 351d, or the two first and second electrodes 351a and 351b to which the current of the fifth frequency is applied, a negative current may be applied to one electrode and a positive current may be applied to the other electrode. For example, of the two electrodes, a negative current may be applied to the former electrode and a positive current may be applied to the latter electrode.

[0169] In the first EMS mode, when step 3 is executed, step 4 and step 5 are not executed, when step 4 is executed, step 3 and step 5 are not executed, and when step 5 is executed, step 3 and step 4 are not executed.

[0170] As described above, the first EMS mode of the skin management device 1 can select any one of stimulation level 1, stimulation level 2, and stimulation level 3, and the third and fourth electrodes 351c and 351d in step 3, the first and fourth electrodes 351a and 351d in step 4, and the first and second electrodes 351a and 351b in step 5, which are executed in the first EMS mode, can be repeatedly executed in a fixed order. The first EMS mode of the skin management device 1 can be repeatedly executed for a fixed period of time in the order of step 3 → step 4 → step 5 → step 4 → step 3 → step 4 → step 5 → step 4. In this case, the total execution time of the first EMS mode can be set to about 5 minutes for the safety of the user, but is not limited to this.

[0171] The RF+EMS mode of the skin management device 1 may be a mode in which the second RF mode and the second EMS mode are executed in combination. The RF+EMS mode may be realized by executing the second RF mode and the second EMS mode simultaneously, or by adding the second EMS mode while executing the second RF mode, or by additionally executing the second RF mode while executing the second EMS mode.

[0172] The RF+EMS mode of the skin management device 1 of this embodiment can be divided into steps 6, 7, and 8, in which the second RF mode is performed on any two of the four first, second, third, and fourth electrodes 351a, 351b, 351c, and 351d, and the second EMS mode is performed on the other two electrodes.

[0173] In step 6 of the RF+EMS mode, the first electrode 351a and the second electrode 351b may be operated in the second RF mode, and the third electrode 351c and the fourth electrode 351d may be operated in the second EMS mode.

[0174] The first electrode 351a and the second electrode 351b operated in the second RF mode can be configured to alternately apply currents of a first frequency (2.2 MHz) and a second frequency (1.8 MHz) at a period of less than one second.

[0175] Each of the third electrode 351c and the fourth electrode 351d operating in the second EMS mode can have a fifth frequency (50 Hz) current applied for a time of 10 μs (microseconds), 12 μs (microseconds), or 14 μs (microseconds) by selecting stimulation level 1, stimulation level 2, or stimulation level 3.

[0176] In step 6 of the RF+EMS mode described above, the second RF mode differs from step 1 of the first RF mode described above only in the frequency applied to the first electrode 351a and the second electrode 351b, and the remaining conditions may be the same or similar, and therefore, detailed description thereof will be omitted here to avoid duplication.

[0177] Furthermore, in step 6 of the RF+EMS mode, the second EMS mode may be performed using the same electrodes and under the same or similar conditions as step 3 of the first EMS mode described above, and therefore, detailed description thereof will be omitted here to avoid duplication.

[0178] In step 7 of the RF+EMS mode, the second electrode 351b and the third electrode 351c can be operated in the second RF mode, and the first electrode 351a and the fourth electrode 351d can be operated in the second EMS mode.

[0179] The second electrode 351b and the third electrode 351c, which are operated in the second RF mode, can be configured to alternately apply currents of the second frequency (1.8 MHz) and the third frequency (1.4 MHz) at a period of less than one second.

[0180] Each of the first electrode 351a and the fourth electrode 351d operating in the second EMS mode can have a current of a fifth frequency (50 Hz) applied for a time of 10 μs (microseconds), 12 μs (microseconds), or 14 μs (microseconds) by selecting stimulation level 1, stimulation level 2, or stimulation level 3.

[0181] In step 7 of the RF+EMS mode described above, the second RF mode differs from step 1 of the first RF mode described above only in the frequency applied to the second electrode 351b, and the remaining conditions may be the same or similar; and compared to step 2 of the first RF mode described above, the second RF mode differs from step 1 of the first RF mode described above only in the frequency applied to the third electrode 351c, and the remaining conditions may be the same or similar; therefore, detailed description thereof will be omitted here to avoid duplication.

[0182] Furthermore, in step 7 of the RF+EMS mode, the second EMS mode may be performed using the same electrodes and under the same or similar conditions as step 4 of the first EMS mode described above, and therefore, detailed description thereof will be omitted here to avoid duplication.

[0183] In step 8 of the RF+EMS mode, the third electrode 351c and the fourth electrode 351d can be operated in the second RF mode, and the first electrode 351a and the second electrode 351b can be operated in the second EMS mode.

[0184] The third electrode 351c and the fourth electrode 351d, which are operated in the second RF mode, can be configured to alternately apply currents of the third frequency (1.4 MHz) and the fourth frequency (1.0 MHz) at a period of less than 1 second.

[0185] Each of the first electrode 351a and the second electrode 351b operating in the second EMS mode can have a fifth frequency (50 Hz) current applied for a time of 10 μs (microseconds), 12 μs (microseconds), or 14 μs (microseconds) by selecting stimulation level 1, stimulation level 2, or stimulation level 3.

[0186] In step 8 of the RF+EMS mode described above, the second RF mode differs from step 2 of the first RF mode described above only in the frequency applied to the third electrode 351c and the fourth electrode 351d, and the remaining conditions may be the same or similar, and therefore, detailed description thereof will be omitted here to avoid duplication.

[0187] Furthermore, in step 8 of the RF+EMS mode, the second EMS mode may be performed using the same electrodes and under the same or similar conditions as step 5 of the first EMS mode described above, and therefore, detailed description thereof will be omitted here to avoid duplication.

[0188] As described above, in the RF+EMS mode of the skin management device 1, the second RF modes of steps 6, 7, and 8 can be executed corresponding to steps 1 and 2 of the first RF mode. In the RF+EMS mode of the skin management device 1, the second EMS modes of steps 6, 7, and 8 can be executed corresponding to steps 1 and 2 of the first RF mode. teeth This can be performed in a manner corresponding to steps 3, 4, and 5 of the first EMS mode described above.

[0189] In the RF+EMS mode of the skin management device 1, steps 6, 7, and 8 may be performed by combining the execution process of steps 1 and 2 of the first RF mode and the execution process of steps 3, 4, and 5 of the first EMS mode, although the execution order may be different.

[0190] That is, in the RF+EMS mode, the RF mode can select any one of acceleration level 1, acceleration level 2, and acceleration level 3, and the first and second electrodes 351a and 351b in step 6, the second and third electrodes 351b and 351c in step 7, and the third and fourth electrodes 351c and 351d in step 8, which are executed in the second RF mode after the acceleration mode, can be repeatedly executed in a certain order. In the RF+EMS mode, the second RF mode can be repeatedly executed for a certain period of time in the order of step 6 → step 7 → step 8 → step 7 → step 6 → step 7 → step 8 → step 7.

[0191] In addition, in the RF+EMS mode, the third and fourth electrodes 351c and 351d in step 6, the first and fourth electrodes 351a and 351d in step 7, and the first and second electrodes 351a and 351b in step 8, which are performed in the second EMS mode, may be repeatedly performed in a certain order. In the RF+EMS mode, the second EMS mode may be repeatedly performed for a certain period of time in the order of step 6 → step 7 → step 8 → step 7 → step 6 → step 7 → step 8 → step 7.

[0192] When the skin management device 1 of this embodiment was tested on a human body in RF mode, the following results were obtained.

[0193] 1. Skin wrinkle analysis

[0194] [1] Wrinkles around the eyes: Compared to before use, the overall size, depth, and maximum depth parameters were significantly reduced immediately after use and after 4 weeks (p<0.05), with reduction rates ranging from 8.87% to 14.52%.

[0195] [2] Nasolabial folds: Compared to before use, the overall size and depth parameters were significantly reduced immediately after use and after 4 weeks, and the width parameter was significantly reduced after 4 weeks of use (p<0.05), with reduction rates ranging from 3.43% to 10.08%.

[0196] [3] Forehead wrinkles: Compared to before use, the overall size and depth parameters were significantly reduced immediately after use and after 4 weeks (p<0.05), with reduction rates ranging from 2.14% to 10.08%.

[0197] [4] Glabellar wrinkles: Compared to before use, the overall size, depth, and maximum depth parameters were significantly reduced immediately after and 4 weeks after use, and the width parameter was significantly reduced 4 weeks after use (p<0.05), with reduction rates ranging from 1.85% to 11.78%.

[0198] 2.Skin pore analysis

[0199] Compared to before use, volume, count, and density parameters were significantly reduced at 2 and 4 weeks after use (p<0.05), with reduction rates ranging from 6.79% to 14.66%.

[0200] 3. Skin Brightness Analysis

[0201] Compared to before use, the hyperconcentration parameter of the pigmented area significantly decreased after 2 and 4 weeks of product use, and the affected area parameter significantly decreased after 4 weeks of product use (p<0.05). The reduction rates were 7.44% and 11.16%, respectively, for the hyperconcentration parameter, and 14.07% for the affected area parameter.

[0202] 4. Elastic recovery analysis of indented skin

[0203] Compared to before use, the elastic recovery of the pressed skin mark significantly increased (p<0.05) at 2 and 4 weeks after use of the product, with the increase rates being 12.78% and 21.82%, respectively.

[0204] 5. Skin moisture (density) analysis

[0205] Compared to before use, skin moisture (density) increased significantly (p<0.05) immediately after use and 4 weeks later, with increases of 226.79% and 12.07%, respectively.

[0206] 6. Skin density analysis

[0207] Compared to before use, skin density significantly increased (p<0.05) after 2 and 4 weeks of product use, with increases of 8.60% and 17.90%, respectively.

[0208] 7. Skin lifting analysis

[0209] Compared to before use, the volume of the double chin area was significantly reduced immediately after use and 4 weeks later (p<0.05), with reduction rates of 10.14% and 21.74%, respectively.

[0210] 11(a), which shows the transfer of thermal energy to the dermis layer by the skin management device 1 of the present invention, and FIG. 11(b), which shows the transfer of thermal energy to the dermis layer by the skin management device of the comparative invention, the thermal energy transfer in the skin management device 1 of the present invention is uniform from the upper dermis to the lower dermis, whereas the thermal energy transfer in the skin management device of the comparative invention is superior in terms of thermal energy transfer efficiency, such that when thermal energy is transferred to the upper dermis, thermal energy is not transferred to the lower dermis. Here, the skin management device of the comparative invention uses fixed RF frequency electrodes, changes the frequency in units of 2 seconds or more, and simultaneously transfers energy to the epidermis and the lower dermis, and is one of the products currently on the market.

[0211] The features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by a person skilled in the art to which the embodiment belongs. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

[0212] Furthermore, although the above description has focused on the embodiments, these are merely examples and are not intended to limit the present invention. A person skilled in the art to which the present invention pertains may make various modifications and applications not exemplified above within the scope of the essential characteristics of the present embodiments. For example, each component specifically presented in the embodiments may be modified and implemented. Differences related to such modifications and applications should be construed as being included within the scope of the present invention as defined by the appended claims.

Claims

1. a body including a first terminal; a head portion connected to the body and detachable from the body, The head portion is a housing including an internal storage space; a substrate disposed within the housing; an electrode portion disposed within the housing and on the substrate; a second terminal disposed on a lower portion of the substrate and electrically connected to the first terminal of the body; The electrode portion is a first electrode disposed at the center of the head portion; a second electrode wrapped around the first electrode and spaced apart at equal intervals; a third electrode that is wrapped around the second electrode and spaced apart at equal intervals; a fourth electrode that is wrapped around the third electrode and spaced apart at equal intervals; the first, second, third, and fourth electrodes are operated in a first RF mode; The first RF mode is a skin management device that applies different frequencies to any two of the first, second, third, and fourth electrodes in an alternating manner at a set period, so that high-frequency thermal energy is transmitted evenly from the upper dermis to the lower dermis.

2. The first RF mode is The frequencies used for the first, second, third, and fourth electrodes are set to four frequencies in the range of 1 MHz to 3 MHz (high frequency); The skin management device according to claim 1 , wherein the four frequencies are set to a first frequency, a second frequency, a third frequency, and a fourth frequency in order from longest to shortest.

3. The first frequency is set to 2.2 Mhz; The second frequency is set to 1.8 MHz; The third frequency is set to 1.4 MHz; The skin management device according to claim 2 , wherein the fourth frequency is set to 1.0 MHz.

4. further comprising an acceleration mode for rapid heat transfer to the skin prior to activation of the first RF mode; The acceleration mode is One of acceleration levels 1, 2, and 3 is selected and activated, which are set in order from shortest to longest acceleration time, the third and fourth electrodes are supplied with the current of the first frequency at a duty of 100%; The skin management device according to claim 2 , wherein a negative current is applied to one of the third and fourth electrodes, and a positive current is applied to the other electrode.

5. The first RF mode is The acceleration mode is automatically executed for a certain period of time from the time when the acceleration mode is completed, and the execution is automatically interrupted after the certain period of time has elapsed.

5. The skin management device according to claim 4, wherein the process is divided into step 1 and step 2 in such a way that when currents of any two of the first, second, third, and fourth frequencies are alternately applied to any two of the first, second, third, and fourth electrodes at a set period, no current is supplied to the other two electrodes.

6. The first RF mode is In the step 1, the currents of the second frequency and the fourth frequency are alternately applied to the first and second electrodes several times to several tens of times in a cycle of less than one second during a first set time, In the step 2, the currents of the first frequency and the third frequency are alternately applied to each of the third and fourth electrodes several times to several tens of times in a cycle of less than one second during the first set time, A negative current is applied to one of the two first and second electrodes or the two third and fourth electrodes, and a positive current is applied to the other electrode; The skin management device according to claim 5 , wherein the steps 1 and 2 are alternately performed with a second set time interval in between during which no current is supplied to the first, second, third, and fourth electrodes.

7. the first set time is increased from the acceleration level 1 to the acceleration level 3, The skin management device according to claim 6 , wherein the second set time becomes relatively shorter as the acceleration level goes from the acceleration level 1 to the acceleration level 3.

8. The first RF mode is The skin management device according to claim 5 , wherein, after the acceleration mode, the steps 1, 2, 1 and 2 are repeatedly executed in this order for a certain period of time.

9. the first, second, third, and fourth electrodes are operated in a first EMS mode instead of the first RF mode; The first EMS mode is When a current of a fifth frequency is applied to any two of the first, second, third, and fourth electrodes at a set period, no current is supplied to the other two electrodes, and the process is divided into steps 3, 4, and 5, and is performed; In the step 3, a current of the fifth frequency is applied to each of the third and fourth electrodes; In the step 4, a current of the fifth frequency is applied to each of the first and fourth electrodes; In step 5, a current of the fifth frequency is applied to each of the first and second electrodes; The skin management device according to claim 1, wherein a negative current is applied to one of the two third and fourth electrodes, the two first and fourth electrodes, or the two first and second electrodes, and a positive current is applied to the other electrode.

10. The first EMS mode is Select and execute any one of stimulation level 1, stimulation level 2, and stimulation level 3, which are set in order from shortest to longest stimulation times so that the stimulation times are different in each of steps 3, 4, and 5; The skin management device according to claim 9 , wherein no current is supplied to the first, second, third, and fourth electrodes for a certain period of time during each of steps 3, 4, and 5.

11. The first EMS mode is The skin management device according to claim 9, wherein the steps are repeatedly executed for a certain period of time in the order of step 3 → step 4 → step 5 → step 4 → step 3 → step 4 → step 5 → step 4.

12. the first, second, third, and fourth electrodes are operated in an RF+EMS mode instead of the first RF mode; The RF+EMS mode is The skin management device of claim 1, wherein the second RF mode is performed on any two of the first, second, third, and fourth electrodes, and the second EMS mode is performed on the other two electrodes, and the process is divided into steps 6, 7, and 8.

13. In step 6, the first and second electrodes are operated in the second RF mode, and the third and fourth electrodes are operated in a second EMS mode; In step 7, the second and third electrodes are operated in the second RF mode, and the first and fourth electrodes are operated in the second EMS mode; The skin management device of claim 12, wherein in step 8, the third and fourth electrodes are operated in the second RF mode, and the first and second electrodes are operated in the second EMS mode.

14. The second RF mode is The frequencies used for the first, second, third, and fourth electrodes are set to four frequencies in the range of 1 MHz to 3 MHz (high frequency); The four frequencies are set to a first frequency, a second frequency, a third frequency, and a fourth frequency in order from longest to shortest, The second EMS mode is The skin management device according to claim 13, wherein the frequencies used for the first, second, third, and fourth electrodes are set to a fifth frequency in the low frequency range.

15. further comprising an acceleration mode for rapid heat transfer to the skin prior to activation of the second RF mode; The acceleration mode is One of acceleration levels 1, 2, and 3 is selected and activated, which are set in order from shortest to longest acceleration time, the third and fourth electrodes are supplied with the current of the first frequency at a duty of 100%; The skin management device according to claim 14 , wherein a negative current is applied to one of the third and fourth electrodes, and a positive current is applied to the other electrode.

16. The second RF mode is In step 6, the currents of the first frequency and the second frequency are alternately applied to the first and second electrodes several times to several tens of times in a cycle of less than one second during a first set time, In step 7, the currents of the second frequency and the third frequency are alternately applied to the second and third electrodes several times to several tens of times in a cycle of less than one second during the first set time, In step 8, the currents of the third frequency and the fourth frequency are alternately applied to the third and fourth electrodes several times to several tens of times in a cycle of less than one second during the first set time, A negative current is applied to one of the two first and second electrodes, the two second and third electrodes, or the two third and fourth electrodes, and a positive current is applied to the other electrode; Steps 6, 7, and 8 are alternately performed with a second set time interval therebetween during which no current is supplied to the first, second, third, and fourth electrodes, respectively; the first set time is increased from the acceleration level 1 to the acceleration level 3, the second set time becomes relatively shorter as the acceleration level goes from the acceleration level 1 to the acceleration level 3, The second EMS mode is In step 6, a current of the fifth frequency is applied to each of the third and fourth electrodes; In step 7, a current of the fifth frequency is applied to each of the first and fourth electrodes; In step 8, a current of the fifth frequency is applied to each of the first and second electrodes; The skin management device of claim 15, wherein a negative current is applied to one of the two third and fourth electrodes, the two first and fourth electrodes, or the two first and second electrodes, and a positive current is applied to the other electrode.

17. The second EMS mode is Select and execute any one of stimulation level 1, stimulation level 2, and stimulation level 3, which are set in order from shortest to longest stimulation times so that the stimulation times are different in each of steps 6, 7, and 8; The skin management device according to claim 16, wherein no current is supplied to the first, second, third, and fourth electrodes for a certain period of time during each of steps 6, 7, and 8.

18. The RF+EMS mode is The skin management device according to claim 12, wherein the steps 6, 7, 8, 7, 6, 7, 8, and 7 are repeatedly executed in this order for a certain period of time in the second RF mode and the second EMS mode.

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