Skin treatment equipment

Abstract

To provide novel skin treatment equipment capable of effectively operating in a wide area and treating small parts and a curved skin surface.SOLUTION: Skin treatment equipment includes a head part and electrodes for giving the skin electric stimulations provided along the surface of the head part. Intersection lines of the surface of the head part and a first vertical cross section including a first direction of the head part are curved, and intersection lines of the surface of the head part and a second vertical cross section including a second direction orthogonal to the first direction of the head part are curved, and at least a part of intersection lines of the surface of the head part and a horizontal cross section are curved.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a skin treatment device.

Background Art

[0002] There is known a technique of activating fibroblasts present in the skin by stimulation with a physical stimulation generation circuit (ultrasonic oscillation circuit, low-frequency generation circuit, heat generation circuit, light wavelength oscillation circuit) to promote the production of collagen and elastin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in Patent Document 1 and Patent Document 2, although a beauty device having an electrode portion is disclosed, there is a problem that it is difficult to act on a wide area or to effectively act on fine parts or a curved skin surface.

[0005] Therefore, an object of the present disclosure is to provide a novel skin treatment device that can act on a wide area and can also effectively act on fine parts or a curved skin surface.

Means for Solving the Problems

[0006] On one side, it includes a head portion and electrodes provided along the surface of the head portion for applying electrical stimulation to the skin. The intersection line between the surface of the head portion and a first vertical cross-section including the first direction of the head portion is curved. The intersection line between the surface of the head portion and a second vertical cross-section including a second direction orthogonal to the first direction of the head portion is curved. At least a part of the intersection line between the surface of the head portion and a horizontal cross-section is curved, and a skin treatment device is provided.

Advantages of the Invention

[0007] According to the present disclosure, a novel skin treatment device is provided that can act on a wide area and is also effective in acting on fine parts and curved skin surfaces.

Brief Description of the Drawings

[0008]

Figure 1

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings.

[0010] (First Embodiment) FIG. 1 is a perspective view showing the appearance of a skin treatment device 200 according to this embodiment as an example of a specific configuration mode of the skin treatment device. FIG. 2 is a schematic functional block diagram of the skin treatment device according to this embodiment. FIGS. 3A to 3F are a schematic front view, a schematic rear view, a schematic top view, a schematic bottom view, a schematic left side view, and a schematic right side view of the skin treatment device 200, respectively. FIG. 4 is a diagram for explaining an example of the size of the skin treatment device 200.

[0011] For the sake of explanation, the longitudinal direction (first direction) of the skin treatment device 200 is referred to as the x-axis direction or the horizontal direction, and may be referred to as right or left. Further, the short-side direction (second direction) of the skin treatment device 200, which is perpendicular to the x-axis, is referred to as the y-axis direction or the depth direction, and may be referred to as back or front. Also, the vertical direction is referred to as the z-axis direction or the height direction, and may be referred to as up or down.

[0012] The skin treatment device 200 of this embodiment is in the form of a beauty device, and is configured to apply beauty-related effects to the skin of the user's face by applying various outputs through a plurality of electrodes that contact the user's skin. However, in a modified example, the skin treatment device 200 may be configured to apply similar beauty-related effects to other parts of the user's body in addition to or instead of the user's face. Here, the various outputs refer to outputs such as AC stimulation, electrical stimulation including DC stimulation, ultrasonic waves, and LED light irradiation. Further, the skin treatment device 200 may be used to apply effects different from beauty-related effects (for example, an effect of promoting transdermal absorption of pharmaceuticals).

[0013] The beauty-related effects are arbitrary and may include the elimination of sagging, tightening, fat burning, lifting, face slimming, firmness and gloss of the skin, improvement of moisture, or any combination of two or more of the like. Also, the beauty-related effects may be effects that can be quantified or effects that cannot be quantified.

[0014] The skin treatment device 200 of this embodiment is configured to apply beauty-related effects to the user's skin by applying various outputs through a plurality of electrodes that come into contact with the user's skin.

[0015] The skin treatment device 200 of this embodiment is portable and can be held by the user's hand, but it may also be applied in a movable type that is movably supported by a fixed device via an arm, a probe, etc.

[0016] As shown in FIG. 2, the skin treatment device 200 according to this embodiment may include a main body 210, one or more electrodes (exemplified by electrodes 221 to 227), a heater 230, an LED 240, buttons 251 to 253, a temperature sensor 261, a motion sensor 262, a display unit 270, a secondary battery 280, and part or all of a control unit 290. The skin treatment device 200 may be provided with a detachable lid (not shown) that covers the terminal for USB connection.

[0017] As shown in FIGS. 3A to 3F, the main body 210 includes a front surface 211, a back surface 212, a bottom surface 213, and a head portion 214. In this case, the user can hold the main body 210 and apply the head portion 214 to a desired site on his / her own face or the face of another person (e.g., a patient), thereby applying various outputs from the skin treatment device 200 to the desired site.

[0018] The shape of the main body 210 is symmetric about a yz vertical cross-section (see the dashed line in FIGS. 3A and 3C) passing through the center in the horizontal direction. As shown in FIG. 4, the main body 210 has, for example, a horizontal length (width) of about 114.35 mm, a depth length of about 43.2 mm, and a height of about 72.2 mm. However, the width and the depth length may be substantially the same. And the main body 210 can accommodate part or all of the heater 230, the LED 240, the temperature sensor 261, the motion sensor 262, the secondary battery 280, and the control unit 290.

[0019] Each surface of the main body 210 may be a flat surface or a curved surface, but in this example, all surfaces are curved surfaces. The front surface 211 and the back surface 212 can also be referred to as the side surfaces of the main body 210. The front surface 211 and the back surface 212 extend in the x-axis direction in a belt shape and are joined to each other on the left and right side surfaces. Buttons 251 to 253 and a display unit 270 are arranged on the back surface 212. As shown in Fig. 3F, a cap 212a that covers a USB terminal for charging the secondary battery 280 is provided near the joint on the right side surface. The front surface 211 and the back surface 212 are formed of, for example, an ABS resin.

[0020] The bottom 213 corresponding to the lower part of the main body 210 has an inverted M shape, and two downward convex portions 213a, 213b and a concave portion 213c therebetween are provided. The width of the concave portion 213c (the distance between the apexes of the convex portions 213a and 213b) is, for example, 5 mm to less than 100 mm, preferably less than 20 to 60 mm, and the height (the depth of the concave portion 213c) is 1 mm to less than 50 mm, preferably 1 mm to less than 20 mm. The inner grip diameter may be of a size that can be gripped by the user's hand. For example, for a woman with an inner grip diameter of about 40 mm in this embodiment, it is a suitable size for placing the base of the thumb and holding the skin treatment device 200. The bottom 213 can also be used as a cassa. The bottom 213 is formed of a light-transmissive material, for example, a PET resin. Electrodes may also be provided on the bottom 213 to be in contact with the skin and apply an electrical stimulus. Note that the shape formed by the two convex portions in the inverted M shape and the concave portion therebetween is not limited to the bottom, and may be provided on the side surface connecting the head portion and the bottom. It can be used as a cassa, is formed of a light-transmissive material, for example, a PET resin, and may have a structure that irradiates light outward.

[0021] The head portion 214 is capable of contacting the user's skin and has a form suitable for contacting the user's skin. The head portion 214 desirably has, for example, a curved shape without a flat portion, and more desirably has a shape curved in three axial directions. Note that the curved shape only requires at least a part of the head portion 214 to be curved. The head portion 214 is provided on the upper part of the main body 210. The lower part of the head portion 214 is connected to the upper parts of the front surface 211 and the back surface 212. Note that the head portion 214 may be integral with the front surface 211 and the back surface 212 or may be a separate member. The head portion 214 has a contact surface that contacts the user's skin, and the form of the contact surface may be arbitrary, such as rectangular, circular, elliptical, or polygonal.

[0022] A plurality of electrodes or electrode groups can be disposed in the head portion 214 for each attribute. In this embodiment, electrodes 221 to 227 are provided in the head portion 214.

[0023] Specifically, as shown in FIGS. 3A and 3B, when the head portion 214 is viewed from the front to the back along the y-axis, the surface (upper surface) of the head portion 214 is curved. In other words, the intersection line between the surface of the head portion 214 and the xz cross-section (vertical cross-section including the longitudinal direction) is curved. More specifically, the intersection line is convex with the lateral center (the dashed line in FIG. 3A) as the vertex, and the height decreases as it approaches both ends. Here, the vertical cross-section including the longitudinal direction described above is the first vertical cross-section including the first direction of the present invention.

[0024] Further, as shown in FIGS. 3C and 3D, when the head portion 214 is viewed from above to below along the z-axis, the surface (outer contour) of the head portion 214 is curved. In other words, the intersection line between the surface of the head portion 214 and the xy cross-section (horizontal cross-section) is curved. Note that the entire intersection line does not have to be curved, and it only needs to be curved at least in part.

[0025] Furthermore, as shown in FIGS. 3E and 3F, when looking at the head portion 214 from left (right) to right (left) along the x-axis, the surface (upper surface) of the head portion 214 is curved. In other words, the intersection line between the surface of the head portion 214 and the yz cross-section (vertical cross-section including the short side direction) is curved. More specifically, the intersection line is convex with a predetermined position (see arrow F in FIGS. 3E and 3F) as the vertex, and the height becomes lower as it approaches both ends. The vertex forms a top extending in the x-axis direction (the top appears as the upper surface in FIGS. 3A and 3B). Here, the vertical cross-section including the short side direction described above is the second vertical cross-section including the second direction of the present invention.

[0026] The electrodes 221 to 227 are provided along the head portion 214 of this embodiment, and both the portions with the electrodes 221 to 227 and the portions without them in the head portion 214 can be used as the cassa. The head portion 214 is formed of a light-transmissive material, for example, a PET resin.

[0027] The electrodes 221 to 227 are in contact with the skin to give an electrical stimulus. An example of the electrical stimulus is to apply an alternating voltage to any one of the electrodes, and the vicinity of the electrode on the skin is heated by induction heating. Another example of the electrical stimulus is to apply an alternating voltage between any two electrodes, and a current flows through the skin between the two electrodes and is heated by conductive heating and / or a muscle stimulus is given. The voltage amplitude and frequency of these alternating voltages may be fixed, or any of the preset options may be applied, or the user may be able to set or select arbitrarily. Another example of the electrical stimulus is ion introduction from any one or more of the electrodes. More specific examples of how to give an electrical stimulus to the skin from the electrodes 221 to 227 will be described later.

[0028] At least a part (preferably all) of the electrodes 221 to 227 does not protrude from the surface of the head portion 214. In other words, it is preferably provided on the same curved surface as the surface of the head portion 214. When the electrodes 221 to 227 are brought into contact with the skin, the head portion 214 will also come into contact with the skin. However, since the electrodes 221 to 227 do not protrude from the head portion 214, when the electrodes 221 to 227 are moved while in contact with the skin, it is possible to prevent the electrodes 221 to 227 from catching on the skin and causing physical irritation. However, a part or all of the electrodes 221 to 227 may protrude from the surface of the head portion 214.

[0029] One of the electrodes (for example, electrode 223) is provided near the apex of the head portion 214. Another one of the electrodes (for example, electrode 222) is provided at a position away from the apex of the head portion 214. And these electrodes 222 and 223 are separated from each other to such an extent that they can be in a state where electrode 223 is in contact with the skin but electrode 222 is not in contact with the skin, a state where electrode 223 is not in contact with the skin but electrode 222 is in contact with the skin, and a state where both electrode 223 and electrode 222 are in contact with the skin. As an example, the shortest distance between electrode 222 and electrode 223 is more than 1 mm and less than 70 mm, preferably more than 1 mm and less than 50 mm, more preferably more than 1 mm and less than 30 mm, and they are separated from each other.

[0030] Also, at least a part of one or more (preferably two or more) of the electrodes 221 to 227 is visible from any of the x-axis direction, y-axis direction, and z-axis direction. By arranging the electrodes in this way on the curved head portion 214, it becomes easier to bring the desired electrode into contact with the skin from various angles.

[0031] Hereinafter, specific examples of the shape, arrangement, and size of the electrodes 221 to 227 will be described. Electrode 221 is provided at the leftmost end of the head portion 214 (see FIG. 3A). The area of electrode 221 is, for example, about 20 to 500 mm 2 or so, and as a specific example, 240 mm 2is the case. Further, the electrode 221 generally extends in the y-axis direction (see FIG. 3C). Furthermore, a part of the electrode 221 is on the front surface 211 side from the top, and another part is on the back surface 212 side (see FIG. 3C). However, when comparing the area of the portion on the front surface 211 side with the area of the portion on the back surface 212 side, it is desirable that the former is larger.

[0032] With such a configuration, it becomes easier to bring the portion of the electrode 221 on the front surface 211 side into contact with the skin. In addition, while bringing the portion of the electrode 221 on the front surface 211 side into contact with the skin, the display unit 270 disposed on the back surface 212 can be viewed with a mirror. In addition, when the skin treatment device 200 is held in the hand, it becomes difficult for a finger to touch the electrode 221 on the back surface 212 side. The same applies to the other electrodes 222 to 227.

[0033] The electrode 222 is provided adjacent to the electrode 221 (see FIG. 3A). The area of the electrode 222 is, for example, 20 to 500 mm 2 or so, and as a specific example, 310 mm 2 or so, and is larger than the electrode 221. The electrode 222 generally extends in the y-axis direction along the electrode 221 (see FIG. 3C).

[0034] A part 223a of the electrode 223 is provided adjacent to the electrode 222, another part 223b is provided near the vertex of the head portion 214, and another part 223c is provided adjacent to the electrode 226 (see FIG. 3A). The area of the electrode 223 is, for example, 100 to 800 mm 2 or so, and as a specific example, 470 mm 2 or so. At least a part of each of the portions 223a to 223c of the electrode 223 extends in the y-axis direction.

[0035] The electrode 224 is disposed between a part 223a and 223b of the electrode 223 and generally extends in the y-axis direction. The area of the electrode 224 is, for example, 20 to 600 mm 2 or so, and as a specific example, 300 mm 2 is.

[0036] Since the electrodes 225 to 227 are respectively the left - right reversed versions of the electrodes 224, 222, and 221, a detailed description thereof will be omitted.

[0037] As shown in FIG. 4, the distance (the longest distance) between the location closest to the left end of the head portion 214 in the electrode 221 and the location closest to the right end of the head portion 214 in the electrode 227 provided at the rightmost side of the head portion 214 is about 103 mm, but desirably it is 110 mm or less. Also, the shortest distance between the electrode 221 and the electrode 227 is about 70 mm, but desirably it is 50 mm or more, and more desirably 70 mm or more. And one or more of the electrodes 222 to 226 may be arranged between the electrodes 221 and 227.

[0038] By setting the size in this way, it is possible to bring the electrodes 221 to 227 into contact with the large muscles (major and minor cheekbones) of the face and apply stimulation. By bringing the electrodes 221 to 227 into contact with a wide range covering the cheeks, the skin treatment device 200 can be moved along the muscles and face lines in a wide range, enabling care over a wide range along the curved surface of the cheeks in a single treatment.

[0039] Supplementary explanations for the above - mentioned size will be given based on FIGS. 5 and 6. It is known that the average distance between the earlobes of women (FIG. 5(a)) is 141.5 mm, the nose width (FIG. 5(b)) is 33 mm, and the average value of the B - B' distance in FIG. 5(c) is 54.25 (= (141.5 - 33) / 2) mm. Therefore, the shortest distance between the electrode 221 and the electrode 227 is desirably 50 mm or more. Also, it is known that the average distance between the back of the head and the nasion of women (FIG. 6(a)) is 177 mm, the distance between the back of the head and the earlobe (FIG. 6(b)) is 85.3 mm, and the average value of the A - A' distance in FIG. 6(c) is 91.7 mm (= 177 - 85.3). Therefore, in terms of preventing unnecessary enlargement, a longest distance of 110 mm between the electrode 221 and the electrode 227 is sufficient, and less than that is desirable.

[0040] Also, as shown in FIG. 4, the distance between the tip of a part 223b of the electrode 223 on the back surface 212 side and the top of the head part 214 is, for example, about 5 to 20 mm, and as a specific example, it is 15 mm. By setting such a distance, it becomes easier to bring the head part 214 provided with the electrode 223 into contact with the neck muscle.

[0041] Also, the distance between the center of gravity of the electrode 221 and the center of gravity of the electrode 222 is, for example, 13.5 mm, and it is preferably 10 mm or more. By setting such a distance, it becomes possible to bring only the electrodes 221 and 222 into contact with the skin at fine parts such as the temples and the inner corners of the eyes.

[0042] Although not shown in the figure, the shortest distance between the electrode 221 and the electrode 222 is, for example, about 1 to 10 mm, and as a specific example, it is about 4 mm. The shortest distance between the electrode 222 and the part 223a of the electrode 223 is, for example, about 1 to 10 mm, and as a specific example, it is about 3.55 mm. The shortest distance between the part 223a of the electrode 223 and the electrode 224 is, for example, about 1 to 10 mm, and as a specific example, it is about 2 mm. The shortest distance between the electrode 224 and the part 223b of the electrode 223 is, for example, about 1 to 10 mm. Thus, the distances between the electrodes are not uniform. Thereby, it is possible to flexibly adjust whether to apply electrical stimulation to a narrow range or a wide range on the skin. Also, by making the distance between some of the electrodes sufficiently small (for example, the shortest distance between the part 223a of the electrode 223 and the electrode 224 is about 2 mm), the skin in contact with the electrode is more likely to feel warmth.

[0043] Figs. 7A to 7E show an example of the usage method of the skin treatment device according to this embodiment. By arranging the electrodes 221 to 227 as described above, it can be applied to a wide area such as the décolletage or the neck muscles. For example, by using the upper surface of the skin treatment device 200 (the part visible in Fig. 3C), the electrodes 221 to 217 can be brought into contact with the skin surface of a wide area such as the décolletage or the neck muscles (see Fig. 7A). Also, when applying to the cheeks, by using the front surface 211 of the skin treatment device 200 (the part visible in Fig. 3A), the electrodes 221 to 227 can be brought into contact with the skin surface of the cheeks (see Fig. 7B). Also, when applying to fine parts such as the temples and the inner corners of the eyes, by using the side surface (the part visible in Fig. 2E or Fig. 2F), only the electrodes 221 and 222 can be brought into contact with the skin surface of fine parts such as the temples and the inner corners of the eyes (see Figs. 7C and 7D). Also, when applying to a concerned part such as a nasolabial fold, by using the top of the skin treatment device 200, only the electrodes 223 to 225 can be brought into contact with the skin surface (see Fig. 7E). In this way, the skin treatment device according to the present invention can effectively act with one device even on a wide area, on fine parts, or on a curved skin surface, and by effectively acting while pressing against a wide surface, the lifting effect on the skin can be enhanced.

[0044] Here, it is desirable that the electrodes 221 to 227 are not planar but curved. The reason will be described below.

[0045] Fig. 8 is a diagram for explaining the difference in contact area depending on the shape of the electrode. The larger the contact area between the electrode and the skin, the smaller the resistance, and the larger the current flowing through the skin. Assuming that the electrode is flat, as shown in Figs. 8(b1) to 8(b3), regardless of the contact pressure between the skin and the electrode, the contact area between the electrode and the skin is almost constant. Therefore, when the electrode comes into contact with the skin, the contact area becomes large, and a large current suddenly flows through the skin.

[0046] In contrast, in this embodiment, since the electrodes are curved, as shown in FIGS. 8(a1) to (a3), the higher the contact pressure between the skin and the electrodes, the larger the contact area between the electrodes and the skin. Therefore, by gradually increasing the contact pressure, the contact area can be gradually increased, preventing a large current from flowing suddenly through the skin. In particular, since each electrode is curved in three axial directions, finer adjustment of the current flowing through the skin becomes possible, which brings about a desirable effect. Also, due to the curved head shape, the user can adjust the physical sensation of electrical stimulation while adjusting the degree of the pressing force.

[0047] FIG. 9 is a diagram showing an overview of the control unit 290 according to this embodiment. FIG. 10 is a diagram showing an example of the hardware configuration of the control unit 290. In FIG. 10, the peripheral device 160 is schematically illustrated in association with the hardware configuration of the control unit 290.

[0048] The control unit 290 is electrically connected to a power source and is also electrically connected to a plurality of electrodes 221 to 229 and the like. The power source may be realized by an internal battery that can be mounted on the skin treatment device 200, and / or may be realized by an external power source that can be connected to the skin treatment device 200. Note that the control unit 290 may include a power supply circuit or the like that generates various operating power supplies based on the power source. Also, the control unit 290 may include a general-purpose processor, a special-purpose processor, an integrated circuit, an ASIC (Application Specific Integrated Circuits), or the like. In this embodiment, the power source is the secondary battery 280.

[0049] In the example shown in FIG. 10, the control unit 290 includes a CPU (Central Processing Unit) 111, a RAM (Random Access Memory) 112, a ROM (Read Only Memory) 113, an auxiliary storage device 114, a drive device 115, and a communication interface 117 connected by a bus 119, and a wired transceiver 125 and a wireless transceiver 126 connected to the communication interface 117.

[0050] The auxiliary storage device 114 is, for example, an HDD (Hard Disk Drive), an SSD (Solid State Drive), etc., and is a storage device that stores data related to application software, etc. The wired transmission / reception unit 125 includes a transmission / reception unit capable of communicating using a wired network. A peripheral device 160 is connected to the wired transmission / reception unit 125. However, part or all of the peripheral device 160 may be connected to the bus 119 or may be connected to the wireless transmission / reception unit 126. Note that the peripheral device 160 may include the plurality of electrodes 30 described above and a portable terminal such as, for example, the user's smartphone. When including a portable terminal, the user may be able to perform various settings related to the skin treatment device 200 via the portable terminal.

[0051] The wireless transmission / reception unit 126 is a transmission / reception unit capable of communicating using a wireless network. The wireless network may include a wireless communication network of a mobile phone, the Internet, a VPN (Virtual Private Network), a WAN (Wide Area Network), etc. Further, the wireless transmission / reception unit 126 may include a near-field communication (NFC) unit, a Bluetooth (registered trademark) communication unit, a Wi-Fi (Wireless-Fidelity) transmission / reception unit, an infrared transmission / reception unit, etc.

[0052] Note that the control unit 290 may be connectable to the recording medium 116. The recording medium 116 stores a predetermined program. The program stored in this recording medium 116 is installed in the auxiliary storage device 114, etc. of the control unit 290 via the drive device 115. The installed predetermined program can be executed by the CPU 111 of the control unit 290. For example, the recording medium 116 may be a recording medium that optically, electrically, or magnetically records information, such as a CD (Compact Disc)-ROM, a flexible disk, a magneto-optical disk, etc., or a semiconductor memory that electrically records information, such as a ROM, a flash memory, etc. Note that the recording medium 116 does not include a carrier wave.

[0053] In this embodiment, the control unit 290 generates one or more output waveforms that can be applied to the skin via a plurality of electrodes 221 to 227 based on the secondary battery 280.

[0054] In this embodiment, the control unit 290 generates an alternating current waveform M0 (alternating current stimulation) having a frequency between 10 kHz and 250 kHz. In this case, the control unit 290 generates the alternating current waveform M0 so as to be applicable to the user's skin via the plurality of electrodes 221 to 227. That is, the generated alternating current waveform M0 can be applied to the user's skin with some of the plurality of electrodes as the positive electrode (or negative electrode) and the other electrodes as the negative electrode (or positive electrode). The frequency and control method in the present invention are not limited to this embodiment, and high frequency, low frequency, ion import / export, microcurrent, etc. may be used.

[0055] Note that in this specification, unless otherwise specified, the "alternating current waveform" is a concept that includes not only a sine wave but also any waveform having bipolarity.

[0056] The inventor of the present application has found in the research that when the frequency of the alternating current waveform M0 and the distance between the electrodes are within a predetermined range, it is possible to effectively achieve both the heat sensation effect and the muscle stimulation effect. That is, by combining the electrodes, the distance between different electrodes can be selected, and by applying an appropriate frequency according to the selected distance between the electrodes, it becomes possible to provide various electrical stimulations from a single device. With this function, the skin treatment device according to the present invention can realize a customized treatment according to the part and purpose of use.

[0057] As shown in FIG. 2, the heater 230 is disposed inside the main body 210 and is configured to heat some or all of the electrodes 221 to 227 based on control from the control unit 290. One heater 230 may be provided to heat the electrodes 221 to 227, or seven heaters 230 corresponding to each of the electrodes 221 to 227 may be provided. The heating level may be constant. Alternatively, the heating level may be adjustable by the user using a button described later. As a specific example, the user may be able to select any one of 38 degrees, 40 degrees, and 42 degrees.

[0058] The LED 240 is an example of a light source and irradiates light outward through the translucent bottom portion 213 and / or the head portion 214 based on control from the control unit 290. Hereinafter, an arrangement example of the LED 240 will be shown. Note that the light source of the present invention is not limited to an LED, and various light sources such as a halogen lamp and an organic EL can be used.

[0059] FIG. 11 is a yz cross-sectional view of the skin treatment device 200. The skin treatment device 200 has one or more LEDs 241, and the light from the LEDs 241 passes through the translucent head portion 214 and exits between the electrodes. When a light-blocking member 301 is disposed between the head portion 214 and the LED 241, a hole 301a (light-transmitting portion) through which the light from the LED 241 passes is provided in the light-blocking member 301. The LED 241 may be attached to the back surface of the head portion 214, but is preferably disposed at a distance from the head portion 214. This is because light can be diffused between the LED 241 and the head portion 214.

[0060] Note that the portion of the light-blocking member 301 through which light passes may not be a physical hole 301a, and the portion may be light-transmissive. That is, the light-blocking member 301 may be a member in which a light-blocking process (for example, painting, vapor deposition, printing) is performed on a part of a light-transmissive member (for example, a PET resin), and a portion where the light-blocking process is not performed becomes a light-transmissive portion through which light passes.

[0061] In addition, the skin treatment device 200 has one or more LEDs 242, and the light from the LEDs 242 passes through the translucent bottom 213. When a light-blocking member 302 is disposed between the bottom 213 and the LEDs 242, a hole 302a (light-transmitting portion) through which the light from the LEDs 242 passes is provided in the light-blocking member 302. The LEDs 242 may be attached to the back surface of the bottom 213, but are preferably disposed at a distance from the bottom 213. This is because light can be diffused between the LEDs 242 and the bottom 213.

[0062] Note that the portion of the light-blocking member 302 through which light passes may not be a physical hole 302a, and the portion may be translucent. That is, the light-blocking member 302 may be a part of a light-transmitting member (e.g., a PET resin) subjected to a light-blocking process (e.g., painting, vapor deposition, printing), and a configuration may be adopted in which a portion not subjected to the light-blocking process serves as a light-transmitting portion and light passes therethrough. Thus, the skin treatment device according to the present invention has a double structure including a translucent head portion and a light-blocking portion, whereby it is possible to appropriately diffuse light and prevent the internal device structure from being exposed from the outside.

[0063] The LED 241 may emit red light. Thereby, blood circulation can be promoted and an effect of improving skin elasticity can be expected. The LED 241 may emit blue light. Thereby, it is possible to suppress skin secretion and expect an effect of tightening pores. The LED 241 may emit yellow light. Thereby, it is possible to activate skin turnover and expect the skin to have transparency and gloss. There is no particular limitation on the color of the light emitted by the LED 241, and it may emit other colors (e.g., blue-green), or two or more LEDs emitting different colors may be provided. The same applies to the LEDs 242.

[0064] The buttons 251 to 253 are an example of an input interface and receive operations from the user. The position where the buttons 251 to 253 are provided is arbitrary, but it is preferably provided on the same surface as the display unit 270, and more preferably provided in the vicinity of the display unit 270.

[0065] Button 251 controls the on / off of the power supply of the skin treatment device 200. For example, when Button 251 is long-pressed in the power-off state, the power supply is turned on. When Button 251 is long-pressed in the power-on state, the power supply is turned off. When Button 251 is single-pressed in the power-on but standby mode state, it enters the active mode. Further, Button 251 sets the heating level by the heater 230. For example, by single-pressing Button 251 in the power-on state, the heating level is sequentially changed as heating level 1 (38 degrees), heating level 2 (40 degrees), heating level 3 (42 degrees), etc.

[0066] Buttons 252 and 253 set or select which electrode to apply what kind of electrical stimulation, or in other words, which electrode to generate what kind of voltage (for example, the amplitude level and frequency of the alternating voltage). As an example, Button 252 sets one of the predetermined operation modes. Button 253 sets the amplitude level of the voltage. Specific examples of the operation mode will be described later.

[0067] The temperature sensor 261 is configured to measure a predetermined location of the skin treatment device 200. As an example, a temperature sensor 261 for measuring the temperature of the electrodes 221 to 227 and a temperature sensor 261 for measuring the temperature of the heater 230 are provided. The measured temperature is transmitted to the control unit 290. The control unit 290 may control the heater 230 according to the measured temperature of the electrodes 221 to 227 or the heater 230. For example, the control unit 290 performs feedback control so that the temperature of the electrodes 221 to 227 reaches the set heating level, or turns off the heater 230 when the temperature exceeds a predetermined temperature.

[0068] The motion sensor 262 is configured to detect the movement of the skin treatment device 200. The detected movement is transmitted to the control unit 290. As an example, when no movement is detected for a predetermined period, the control unit 290 sets the skin treatment device 200 to the standby mode to suppress the consumption of the secondary battery 280.

[0069] The display unit 270 is an example of an output interface and presents various information to the user. The position where the display unit 270 is provided is arbitrary, but it is desirable that the display unit 270 be provided on the back surface 212 together with the buttons 251 to 253. This is because while the portions of the electrodes 221 to 227 on the front surface 211 side are in contact with the skin, the buttons 251 to 253 and the display unit 270 arranged on the back surface 212 can be seen in the mirror.

[0070] Information indicating the power state (e.g., on / off state, remaining amount of the secondary battery) can be displayed on the display unit 270. Also, the set heating level can be displayed on the display unit 270. Further, information indicating from which electrode what kind of electrical stimulation is to be given (e.g., amplitude level of the alternating voltage, frequency, operation mode) can be displayed on the display unit 270.

[0071] The secondary battery 280 is, for example, a lithium-ion battery and supplies power to each part of the skin treatment device 200 based on the control by the control unit 290. Note that a primary battery may be used instead of the secondary battery 280, or power may be supplied from an external DC power source via a commercial AC power supply or USB or the like.

[0072] The control unit 290 controls each part of the skin treatment device 200. For example, the control unit 290 incorporates a voltage converter (such as a DC-AC converter) and generates an alternating voltage with a desired amplitude level and frequency and outputs it from any of the electrodes 221 to 227. Also, the control unit 290 controls the heater 230 or the LED 240 according to the set heating level. Part or all of the control unit 290 may be implemented by hardware or may be realized by a processor executing a predetermined program.

[0073] Hereinafter, specific examples of the control by the control unit 290 will be shown. The control unit 290 performs switching control on which two electrodes among the electrodes 221 to 227 an alternating voltage is to be generated between.

[0074] As a more specific example, when the operation mode is set to the first operation mode by the user's operation on the button 252, the control unit 290 generates an alternating voltage between the electrode 221 and the electrode 222. In this case, the control unit 290 preferably does not generate a voltage from the other electrodes 223 to 227 (floating).

[0075] FIG. 12A schematically shows the operation of the control unit 290 in the first operation mode. The control unit 290 converts the DC voltage from the secondary battery 280 into an alternating voltage of a predetermined frequency and outputs it from the electrodes 221 and 222.

[0076] On the other hand, when the operation mode is set to the second operation mode by the user's operation on the button 252, the control unit 290 generates an alternating voltage between the electrode 221 and the electrode 227. In this case, the control unit 290 preferably does not generate a voltage from the other electrodes 222 to 226 (floating).

[0077] FIG. 12B schematically shows the operation of the control unit 290 in the second operation mode. The control unit 290 converts the DC voltage from the secondary battery 280 into an alternating voltage of a predetermined frequency and outputs it from the electrodes 221 and 227.

[0078] In the first operation mode described above, the distance between the electrodes 221 and 222 where the alternating voltage is generated is relatively short. Therefore, it is possible to give an electrical stimulus (muscle stimulus) and a sense of warmth to a narrow range between the electrodes 221 and 222 on the skin. On the other hand, in the second operation mode, the distance between the electrodes 221 and 227 where the alternating voltage is generated is relatively long. Therefore, it is possible to give an electrical stimulus (muscle stimulus) and a sense of warmth to a wide range between the electrodes 221 and 227 on the skin, and in particular, a gentle muscle stimulus and a sense of warmth can be given. Thus, the range for giving an electrical stimulus can be flexibly controlled.

[0079] In addition, the control unit 290 controls which two of the electrodes 221 to 227 are to be made conductive, in other words, which two electrodes are to have a voltage of the same waveform generated, and in other words, which two electrodes are to have a voltage of the same frequency and the same phase generated.

[0080] As a more specific example, when the operation mode is set to the first operation mode described above by the user's operation on the button 252, the control unit 290 generates an alternating current between the electrode 221 and the electrode 222. The voltage generated at the electrodes 221 and 222 at this time is schematically shown in FIG. 13A.

[0081] On the other hand, when the operation mode is set to the third operation mode by the user's operation on the button 252, the control unit 290 conducts the electrodes 221 and 222 (as the same waveform), and conducts the electrodes 226 and 227 (as the same waveform), while generating an alternating voltage between the electrode 222 and the electrode 226.

[0082] FIG. 12C schematically shows the operation of the control unit 290 in the third operation mode. The control unit 290 conducts the electrodes 221 and 222 (there may be a component having a resistance value between the electrodes 221 and 222), and conducts the electrodes 226 and 227 (there may be a component having a resistance value between the electrodes 226 and 227), and converts the DC voltage from the secondary battery 280 into an alternating voltage of a predetermined frequency and outputs it from the electrodes 221(222), 226(227). The voltage generated at the electrodes 221, 222, 226, and 227 at this time is schematically shown in FIG. 13B.

[0083] In the third operation mode, the area of the electrodes where voltages of the same frequency and the same phase are generated can be increased. Thereby, the flow of a large current locally to the skin is suppressed, and the pain is reduced.

[0084] Note that such a mode may be predetermined, or the user may arbitrarily set the amplitude level, the frequency, which two electrodes among the electrodes 221 to 227 generate an alternating voltage, and which two electrodes among the electrodes 221 to 227 are to be conducted.

[0085] (Variations in electrode relationships) Figures 14 to 16 show variations (modes) of the pair of electrode relationships when electrical stimulation is applied. It may be set to increase the variation of the distance between the electrodes. Figure 18 is an explanatory diagram of the effect.

[0086] With such an electrode structure, various distances between the electrodes can be taken with combinations of electrode pairs. Figures 14 to 16 show variations of combinations of electrode pairs by lines R15 to R17 in the figures. If implemented with a structure in which electrical stimulation is applied at various distances between the electrodes, the distance between the electrodes and the applied frequency can be adjusted, and the region where the electrothermal stimulation acts strongly and the region where the electromyostimulation acts strongly, the region where the electrothermal stimulation and the electromyostimulation act compatibly preferably, etc., the combination of electrodes and the frequency can be controlled according to the purpose. For example, in Figure 17, the action region SC182 by the electrode pair shown in Figure 16 and the action region SC181 by the electrode pairs shown in Figures 14 and 15 are schematically shown. Note that the variations in the combination of electrodes are not limited to this, and combinations such as electrode 221 and 227, 221 and 226 may be used.

[0087] Also, at the distance between the electrodes and the frequency where the electromyostimulation is the main, by adding heating by a heater (not shown) built into the head portion 214 from the skin surface, the effect of warming can be assisted. At the distance between the electrodes and the frequency with electrothermal stimulation, when the thermal sensation stimulation is weak or depending on the characteristics of the site, in addition to the electrical stimulation, heating by a heater can be added from the skin surface. By using both the electrical stimulation and the heater, it is possible to warm from inside the muscle and from the skin surface, and the thermal stimulation can be further strengthened. That is, by providing a heater on the electrode, the heating effect from the surface is added.

[0088] Since the depth of the thermal action is different between the heater and the AC stimulation heat of 40 kHz to 250 kHz, it is possible to use separately, such as adopting stimulation mainly with the heater for sites with thin skin thickness such as the eye area, and adopting a combination of the heater and the AC stimulation heat for sites with thick skin thickness such as the cheek. Thereby, effective care according to the characteristics of each site is realized.

[0089] According to the above, the following aspects are exemplified.

[0090] [A1] A head part, and an electrode provided along the surface of the head part for applying an electrical stimulus to the skin, wherein the intersection line between the surface of the head part and a first vertical cross-section including a first direction of the head part is curved, and the intersection line between the surface of the head part and a second vertical cross-section including a second direction orthogonal to the first direction of the head part is curved, A skin treatment device, wherein at least a part of the intersection line between the surface of the head part and a horizontal cross-section is curved.

[0091] [A2] At least a part of the electrode is visible from a direction orthogonal to the first vertical cross-section, at least a part of the electrode is visible from a direction orthogonal to the second vertical cross-section, The skin treatment device according to [A1], wherein at least a part of the electrode is visible from a direction orthogonal to the horizontal cross-section.

[0092] [A3] The skin treatment device according to [A1] or [A2], wherein the electrode is provided so as not to protrude from the surface of the head part.

[0093] [A4] The skin treatment device according to [A1] or [A2], wherein the electrode is provided on the same curved surface as the surface of the head part.

[0094] [B1] A convex head part, a first electrode provided along the surface of the head part near the apex of the head part for applying an electrical stimulus to the skin, and a second electrode provided along the surface of the head part at a position away from the apex of the head part for applying an electrical stimulus to the skin.

[0095] [B2] The state in which the first electrode is brought into contact with the skin and the second electrode is not brought into contact with the skin, and The state in which the second electrode is brought into contact with the skin and the first electrode is not brought into contact with the skin, and The first electrode and the second electrode are separated from each other to such an extent that any of the states in which the first electrode and the second electrode are brought into contact with the skin can be taken. The skin treatment device according to [B1].

[0096] [B3] The first electrode and the second electrode are separated from each other by 1 mm or more and less than 70 mm. The skin treatment device according to [B1] or [B2].

[0097] [C1] A main body having a first surface, a second surface on the opposite side thereof, and a convex head portion, wherein the head portion is provided at an upper portion of the main body and has a top portion extending in a predetermined direction of the main body, and a main body, An electrode for applying an electrical stimulus to the skin, provided at least in part on the first surface side of the top portion in the head portion. The skin treatment device comprising the electrode.

[0098] [C2] The electrode includes a first portion provided on the first surface side of the top portion and a second portion provided on the second surface side of the top portion, The skin treatment device according to [C1], wherein the area of the first portion is larger than that of the second portion.

[0099] [C3] The skin treatment device according to [C1] or [C2], comprising a display portion provided on the second surface of the main body.

[0100] [C4] On the display portion, Information indicating the power state of the skin treatment device, and Information indicating what kind of electrical stimulus is applied from the electrode, At least a part of which is displayed. The skin treatment device according to [C3].

[0101] [D1] A main body provided with a concave portion at the lower part and a head portion at the upper part, and an electrode provided on the head portion for applying an electrical stimulus to the skin, the skin treatment device comprising the same.

[0102] [D2] The skin treatment device according to [D1], wherein the concave portion is for placing the base of the thumb and holding the skin treatment device.

[0103] [D3] The skin treatment device according to [D1] or [D2], wherein the concave portion has a width of 5 mm or more and less than 100 mm and a height of 1 mm or more and less than 50 mm.

[0104] [E1] A head portion, a first electrode and a second electrode provided on the head portion for applying an electrical stimulus to the skin, and a light source arranged so that light is emitted between the first electrode and the second electrode and separated from the head portion, the skin treatment device comprising the same.

[0105] [E2] A light-transmitting portion through which light from the light source passes is provided between the head portion and the light source, and a light-blocking member is provided, The skin treatment device according to [E1], wherein the head portion is formed of a light-transmitting material.

[0106] [E3] The skin treatment device according to [E2], wherein the light-transmitting portion is a hole provided in the light-blocking member.

[0107] [E4] The skin treatment device according to [E2], wherein the light-blocking member is a part of a light-shielding member subjected to a light-shielding process, and a portion not subjected to the light-shielding process is the light-transmitting portion.

[0108] [F1] A main body having a head portion at the upper part and a bottom portion at the lower part, and an electrode provided on the head portion for applying an electrical stimulus to the skin, A skin treatment device comprising a light source arranged to emit light from the bottom portion.

[0109] [F2] A non-translucent member is provided between the bottom portion and the light source, and the non-translucent member is provided with a translucent portion through which light from the light source passes. The skin treatment device according to [F1], wherein the bottom portion is formed of a translucent material.

[0110] [F3] The skin treatment device according to [F2], wherein the translucent portion is a hole provided in the non-translucent member.

[0111] [F4] The skin treatment device according to [F2], wherein the non-translucent member is a part of a light-shielding member on which a light-shielding process is performed, and a portion where the light-shielding process is not performed is the translucent portion.

[0112] [G1] A head portion, A first electrode, a second electrode, and a third electrode provided on the head portion for applying an electrical stimulus to the skin. A skin treatment device, wherein the widths of the first electrode and the second electrode are different from the widths of the second electrode and the third electrode.

[0113] [H1] A head portion, A first electrode, a second electrode, and a third electrode provided on the head portion for applying an electrical stimulus to the skin, A control unit that switches and controls a first mode in which an AC voltage is generated between the first electrode and the second electrode and a second mode in which an AC voltage is generated between the second electrode and the third electrode, and the second mode in which the first electrode and the second electrode are electrically connected. A skin treatment device comprising the control unit.

[0114] [I1] A head portion, A plurality of electrodes provided on the head portion for applying an electrical stimulus to the skin, A skin treatment device comprising a control unit that controls which electrodes of the plurality of electrodes are to be electrically connected to each other.

[0115] [I2] The skin treatment device according to [I1], wherein the control unit controls which electrodes of the plurality of electrodes are to be electrically connected to each other based on a user operation.

[0116] [J1] A head portion, A first electrode, a second electrode, and a third electrode provided on the head portion for applying an electrical stimulus to the skin, The first electrode has a first portion, a second portion, and a third portion that are electrically connected, The second electrode is disposed between the first portion and the second portion, The skin treatment device, wherein the third electrode is disposed between the second portion and the third portion.

[0117] [J2] The skin treatment device according to [J1], wherein at least a part of the first portion, at least a part of the second portion, at least a part of the third portion, at least a part of the second electrode, and at least a part of the third electrode extend in substantially the same direction.

[0118] [K1] A head portion, A first electrode provided at the most one end side of the head portion for applying an electrical stimulus to the skin, A second electrode provided on the other end side of the head portion opposite to the one end for applying an electrical stimulus to the skin, The distance between the location closest to the one end in the first electrode and the location closest to the other end in the second electrode is 110 mm or less, The skin treatment device, wherein the shortest distance between the first electrode and the second electrode is 50 mm or more.

[0119] [K2] The skin treatment device according to [K1], wherein the shortest distance between the first electrode and the second electrode is 70 mm or more.

[0120] Any part or all of each functional unit described in this specification may be implemented by a program. The program mentioned in this specification can be non-temporarily recorded on a computer-readable recording medium.

[0121] Such a program may be one installed in a computer (so-called native application). In that case, the program may be downloaded to the computer via a communication line such as the Internet (including wireless communication), or may be distributed in a state where it is installed in the computer.

[0122] Alternatively, the program may be one that operates on a web browser (so-called web application). In that case, the computer may receive the program described in a markup language file (for example, an HTML file) from a server and execute it by the web browser.

[0123] Based on the above description, those skilled in the art may be able to conceive of additional effects and various modifications of the present invention, but the aspects of the present invention are not limited to the individual embodiments described above. For example, inventions that take out only a part of each embodiment or inventions that combine a plurality of embodiments are naturally assumed. Various additions, changes, and partial deletions are possible without departing from the conceptual ideas and spirits of the present invention derived from the content defined in the claims and their equivalents.

[0124] For example, what is described as one device (or member, the same hereinafter) in this specification (including what is depicted as one device in the drawings) may be implemented by a plurality of devices. Conversely, what is described as a plurality of devices in this specification (including what is depicted as a plurality of devices in the drawings) may be implemented by one device. Alternatively, some or all of the means and functions included in a certain device may be included in other devices.

[0125] Also, not all of the matters described in this specification are essential requirements. In particular, matters described in this specification but not described in the claims can be regarded as optional additional matters.

[0126] Also, unless otherwise specified, the term "means" in this specification and the claims means hardware itself (or functions realized by hardware) and does not include humans (or human mental activities).

[0127] Furthermore, the functions realized by the components described in this specification may be implemented in circuitry or processing circuitry including a general-purpose processor, an application-specific processor, an integrated circuit, ASICs (Application Specific Integrated Circuits), a CPU (a Central Processing Unit), conventional circuits, and / or combinations thereof, which are programmed to realize the described functions. The processor includes transistors and other circuits and is regarded as circuitry or processing circuitry. The processor may be a programmed processor that executes a program stored in a memory.

[0128] Also, in this specification, circuitry, unit, and means are hardware programmed to realize the described functions or hardware that executes them. The hardware may be any hardware disclosed in this specification or any hardware known to be programmed or execute to realize the described functions.

[0129] When the hardware is a processor regarded as a type of circuitry, the circuitry, means, or unit is a combination of hardware and software used to configure the hardware and / or the processor.

[0130] It should be noted that the applicant of the present application only knows the publicly known inventions described in the documents in the "Prior Art Documents" column of this specification, and it should also be noted that the present invention is not necessarily intended to solve the problems in the publicly known inventions of the same documents. The problems to be solved by the present invention should be determined in consideration of the entire specification. For example, in this specification, when there is a description that a predetermined effect is achieved by a specific configuration, it can also be said that the problems that are the reverse of the predetermined effect are solved. However, it is not necessarily the case that such a specific configuration is an essential requirement.

[0131] Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes are possible within the scope described in the claims. It is also possible to combine all or a plurality of the components of the above-described embodiments.

Explanation of Reference Numerals

[0132] 200 Skin treatment device 210 Main body 211 Front surface 212 Rear surface 212a Cap 213 Bottom 213a, 213b Protrusions 213c Recess 214 Head portion 221~227 Electrodes 230 Heater 240~242 LEDs 251~253 Buttons 261 Temperature sensor 262 Motion sensor 270 Display unit 280 Secondary battery 290 Control unit 301, 302 Light-blocking members

Claims

1. a head part, and electrodes provided along the surface of the head part for applying an electrical stimulus to the skin, wherein an intersection line between the surface of the head part and a first vertical cross section including a first direction of the head part is curved, an intersection line between the surface of the head part and a second vertical cross section including a second direction orthogonal to the first direction of the head part is curved, and at least a part of an intersection line between the surface of the head part and a horizontal cross section is curved, a skin treatment device.

2. at least a part of the electrodes is visible from a direction orthogonal to the first vertical cross section, at least a part of the electrodes is visible from a direction orthogonal to the second vertical cross section, at least a part of the electrodes is visible from a direction orthogonal to the horizontal cross section, the skin treatment device according to claim 1.

3. the electrodes are provided on the same curved surface as the surface of the head part, the skin treatment device according to claim 1 or 2.

4. a convex head part, a first electrode provided along the surface of the head part near the apex of the head part for applying an electrical stimulus to the skin, and a second electrode provided along the surface of the head part at a position away from the apex of the head part for applying an electrical stimulus to the skin, a skin treatment device.

5. a state where the first electrode is in contact with the skin and the second electrode is not in contact with the skin, a state where the second electrode is in contact with the skin and the first electrode is not in contact with the skin, and a state where the first electrode and the second electrode are in contact with the skin, the skin treatment device according to claim 5, wherein the first electrode and the second electrode are separated from each other to such an extent that any of the above states can be achieved.

6. the first electrode and the second electrode are separated from each other by 1 mm or more and less than 70 mm, the skin treatment device according to claim 5 or 6.

7. a main body having a first surface, a second surface on the opposite side thereof, and a convex head part, wherein the head part is provided at an upper part of the main body and has a top extending in a predetermined direction of the main body, the main body, and an electrode provided at least partially on the first surface side of the top in the head part for applying an electrical stimulus to the skin, a skin treatment device.

8. the electrode includes a first portion provided on the first surface side of the top and a second portion provided on the second surface side of the top, and the area of the first portion is larger than that of the second portion, the skin treatment device according to claim 8.

9. a head part, The first electrode and the second electrode provided in the head portion for applying an electrical stimulus to the skin, A skin treatment device comprising a light source arranged so that light emits between the first electrode and the second electrode and separated from the head portion.

10. A light-transmitting portion through which light from the light source passes is provided between the head portion and the light source, and a light-transmitting member provided with a light-transmitting portion is provided, The skin treatment device according to claim 10, wherein the head portion is formed of a light-transmitting material.

11. A main body having a head portion at the upper part and a bottom portion at the lower part, An electrode provided in the head portion for applying an electrical stimulus to the skin, A skin treatment device comprising a light source arranged so that light emits from the bottom portion.

12. A light-transmitting portion through which light from the light source passes is provided between the bottom portion and the light source, and a light-transmitting member provided with a light-transmitting portion is provided, The skin treatment device according to claim 12, wherein the bottom portion is formed of a light-transmitting material.

13. A head portion, The first electrode, the second electrode, and the third electrode provided in the head portion for applying an electrical stimulus to the skin, A skin treatment device in which the widths of the first electrode and the second electrode are different from the widths of the second electrode and the third electrode.

14. A head portion, The first electrode, the second electrode, and the third electrode provided in the head portion for applying an electrical stimulus to the skin, A control unit that switches and controls a first mode in which an AC voltage is generated between the first electrode and the second electrode and a second mode in which an AC voltage is generated between the second electrode and the third electrode, and a second mode in which the first electrode and the second electrode are conducted. A skin treatment device comprising:

15. A head portion, A plurality of electrodes provided in the head portion for applying an electrical stimulus to the skin, A skin treatment device comprising a control unit that controls which electrodes are conducted among the plurality of electrodes.

16. The skin treatment device according to claim 16, wherein the control unit controls which electrodes are conducted among the plurality of electrodes based on a user operation.

17. A head portion, The first electrode, the second electrode, and the third electrode provided in the head portion for applying an electrical stimulus to the skin, The first electrode has a first portion, a second portion, and a third portion that are electrically connected, The second electrode is disposed between the first portion and the second portion, The skin treatment device, wherein the third electrode is disposed between the second portion and the third portion.

18. The skin treatment device according to claim 18, wherein at least a part of the first part, at least a part of the second part, at least a part of the third part, at least a part of the second electrode, and at least a part of the third electrode extend in substantially the same direction.

19. A head part, a first electrode provided at the most distal end side of the head part for applying an electrical stimulus to the skin, a second electrode provided at the other end side of the head part opposite to the one end for applying an electrical stimulus to the skin, and the distance between the location closest to the one end in the first electrode and the location closest to the other end in the second electrode is 110 mm or less, a skin treatment device, wherein the shortest distance between the first electrode and the second electrode is 50 mm or more.

20. The skin treatment device according to claim 20, wherein the shortest distance between the first electrode and the second electrode is 70 mm or more.

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