Beauty device
The cosmetic device uses an amplitude-modulated current to create electroporation, addressing the inability of existing devices to remove internal skin dirt by opening cellular gaps for effective dirt removal.
Patent Information
- Application Number
- JP2024010432
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2025-08-07
AI Technical Summary
Existing beauty devices can effectively remove surface dirt but struggle to remove internal dirt deep within the skin, as they rely on ion derivation that requires gaps for internal dirt to pass through to the skin surface, which is blocked, leaving the skin not fully clean.
A cosmetic device with an electric circuit board generating an energization signal that includes an amplitude-modulated current based on a sine wave with ultra-low frequency range added to a square-wave pulse current, creating an electroporation effect to open gaps between cells and facilitate ion extraction of both surface and internal dirt.
The device effectively removes both surface and internal skin dirt through ion extraction and electroporation, ensuring thorough skin cleanliness by opening cellular gaps for deep dirt removal.
Smart Images
Figure 2025115786000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a cosmetic device. [Background technology]
[0002] A beauty device described in Patent Document 1 is known as background technology for removing skin impurities using a handheld beauty device. Paragraph
[0061] of Patent Document 1 states, "The positive pulse mode is an operating mode in which a DC pulse voltage is continuously applied between the four main electrodes 170-200 and the auxiliary electrode 126b so that the main electrodes 170-200 are at a high potential." Paragraph
[0063] of Patent Document 1 states, "Ion derivation is a method of passing a weak current through the skin to move impurities and other substances having an electric charge corresponding to the polarity of the current to the skin surface. For example, to remove negatively charged impurities and other substances from inside the skin using the beauty device 1 of this example, the main electrodes 170-200 can be brought into contact with the skin and the beauty device 1 can be operated in the positive pulse mode. Operating the beauty device 1 in the positive pulse mode generates an ion derivation current in the closed circuit that moves impurities and other substances to the outside of the skin." [Prior art documents] [Patent documents]
[0003] [Patent Document 1] International Publication No. 2016 / 068199 Summary of the Invention [Problem to be solved by the invention]
[0004] Regarding the dirt removal performance of beauty devices, in the dirt removal operating mode, users want to achieve clean skin by removing not only surface dirt adhering to the surface layer of the skin, but also internal dirt present deep within the skin.
[0005] In contrast, the beauty device described in Patent Document 1 presses the main electrode against the skin in the positive pulse mode for dirt removal, thereby attracting and removing negatively charged dirt such as sebum and dust to the positively charged main electrode. Thus, the skin dirt removal technology described in Patent Document 1 uses ion derivation due to the positive electrical force of the main electrode to remove negatively charged dirt by moving the dirt toward the main electrode. Therefore, when removing internal dirt deep within the skin, a gap (hereinafter referred to as a "gap") is required for the internal dirt to pass through to the skin surface. However, if the gap is blocked, the internal dirt cannot be removed even by ion derivation. Therefore, the beauty device described in Patent Document 1 can remove surface dirt from the skin, but it cannot effectively remove internal dirt deep within the skin, leaving the problem of not being able to effectively remove internal dirt. As a result, it cannot meet user demands for clean skin by removing not only surface dirt but also internal dirt.
[0006] To provide a beauty device which has been made in view of the above-mentioned problem and which effectively removes not only surface dirt on the skin but also internal dirt present deep inside the skin when removing dirt by ion derivation. [Means for solving the problem]
[0007] The cosmetic device of the present invention comprises a body, an electrode located on the body at a position where it comes into contact with the skin, a conductive grip located on the body at a position where it is gripped by a user, and an electric circuit board connected to the electrode and the conductive grip and generating a predetermined energization signal based on a DC power source. The electric circuit board has an energization signal generation circuit that sets the electrode voltage higher than the conductive grip voltage and generates, as the energization signal, a signal obtained by adding an amplitude-modulated current based on a sine wave whose amplitude is modulated with a frequency in the ultra-low frequency range to a square-wave pulse current. [Effects of the Invention]
[0008] The beauty device of the present invention uses an electroporation effect that opens gaps between cells using amplitude-modulated current, so when removing dirt by ion extraction, it can effectively remove not only surface dirt from the skin but also internal dirt that exists deep within the skin. [Brief explanation of the drawings]
[0009] [Figure 1] FIG. 1 is a perspective view showing a cosmetic device of Example 1. [Figure 2] 1 is a front view showing the cosmetic device of Example 1. FIG. [Figure 3] 3 is an enlarged front view showing an electrode portion of the cosmetic device of Example 1. FIG. [Figure 4] FIG. 2 is a block diagram showing the electrical configuration of the beauty device of the first embodiment. [Figure 5] 10 is a time chart showing an example of an electrode square wave characteristic, a conductor grip square wave characteristic, and an amplitude-modulated sine wave characteristic generated by a first energization signal generating circuit in a clean mode. DETAILED DESCRIPTION OF THE INVENTION
[0010] A mode for carrying out the cosmetic device of the present invention will be described below based on Example 1 shown in the drawings.
[0011] The beauty device of Example 1 is a handheld device that is held by the user and was developed to improve skin condition. This beauty device has three operating modes that can be selected by the user: "clean mode," "lift mode," and "heat mode." The beauty device of the present invention, which removes dirt from the skin, performs its function when the "clean mode" is selected and used. [Example]
[0012] [Overall structure of the beauty device (Fig. 1 to 3)] 1 and 2, the cosmetic device E includes a body 10, an electrode 20, a conductive grip 30, a battery power supply 40 (DC power supply), an electric circuit board 50, a power and mode selection switch 60, and a level switch 70. The X-axis direction refers to the long dimension when the cosmetic device E is viewed from the front, the Y-axis direction refers to the short dimension when the cosmetic device E is viewed from the front, and the Z-axis direction refers to the thickness direction perpendicular to the X-axis and Y-axis.
[0013] The body body 10 is composed of a front panel 11, which is located on the front side of the cosmetic device E and has a long, plate-like shape that is long in the X-axis direction and short in the Y-axis direction, and a body panel 12, which is located on the back side of the cosmetic device E and has a long, container-like shape that matches the front panel 11. The front panel 11 has an electrode-mounting inclined surface 11a that occupies just under half of the panel's length in the X-axis direction from the top end, and a button-mounting plane 11b that occupies just over half of the panel's length in the X-axis direction from the bottom end. The electrode-mounting inclined surface 11a is inclined toward the depth direction relative to the button-mounting plane 11b at an angle of approximately 20° to ensure ease of use when applying the electrodes 20 to the face. The body panel 12 has a three-dimensional curved shape with all corners curved to ensure ease of grip. The front panel 11 and the body panel 12 are resin molded products made from the same resin material, such as EBS resin (a thermoplastic resin made from acrylonitrile, butadiene, and styrene) or PC resin (polycarbonate resin).
[0014] The electrode 20 is positioned on the electrode setting inclined surface 11a of the front panel 11 of the body main body 10, where it comes into contact with the skin. The electrode 20 has an electrode head 20a that protrudes from the circular end surface 21b of the electrode base 21 and an electrode shaft 20b that is inserted into the electrode through-hole 21a of the electrode base 21 and connected to the electrical circuit board 50. The electrode 20 has an electrode end surface 20c of the electrode head 20a, which is a combination of a circular flat surface and a smooth arcuate end surface, as the surface that comes into contact with the skin. The electrodes 20 are arranged in a circular region defined on the electrode setting inclined surface 11a, with a total of four electrodes 20 (two pairs), for example, two electrodes (one pair) in the X-axis direction and two electrodes (one pair) in the Y-axis direction, and are arranged in a circular arrangement with equal circumferential intervals. As shown in FIG. 3, the four electrodes 20 are identified by designating them as a first electrode 20A, a second electrode 20B, a third electrode 20C, and a fourth electrode 20D. The electrode 20 is made of a conductive metal material such as 316 medical stainless steel.
[0015] As shown in FIG. 3, the electrode base 21 is a shallow, cup-shaped resin molded product that is fixed to cover a circular region where four electrodes 20 and blue / red LED lamp units 22 are set at the end positions of the electrode-setting inclined surface 11a. The electrode base 21 has a circular end surface 21b with four electrode through-holes 21a into which the electrodes 20 are fitted, and a short, cylindrical side surface 21c extending from the outer periphery of the circular end surface 21b toward the electrode-setting inclined surface 11a. As shown in FIG. 3, the circular central region of the electrode base 21, including the blue / red LED lamp units 22, is made of a transparent resin portion that transmits LED light, while the annular end surface and side surface regions other than the transparent resin portion are made of an opaque (or translucent) resin portion that blocks the transmission of LED light. The electrode base 21 is a resin molded product, and the resin material used is, for example, PETG (polyethylene terephthalate) resin or PC resin. The electrode base 21 has a cotton ring 23 disposed on its outer periphery, the cotton ring 23 having an inner diameter longer than the outer diameter of the electrode base 21 .
[0016] The blue / red LED lighting unit 22 is configured, for example, with a common light-emitting surface and blue and red chips provided on the back side of the common light-emitting surface. As shown in Fig. 3, the common light-emitting surfaces of the blue / red LED lighting unit 22 are arranged in an X-shaped arrangement in the cross-shaped gaps formed between the opposing inner surfaces of the four electrodes 20 on the electrode setting inclined surface 11a covered by the electrode base 21 (for example, 7 x 2 - 1 = 13). The blue / red LED lighting unit 22 is turned off when the clean mode is selected, the blue LED light is turned on when the lift mode is selected, and the red LED light is turned on when the heat mode is selected.
[0017] The cotton ring 23 has a circular ring shape that surrounds the electrode base 21 and is detachably attached to the electrode setting inclined surface 11a on the outer periphery of the electrode base 21. In the clean mode, this cotton ring 23 is used to attach and secure cotton soaked in purified water, ion-extracting lotion, or the like. The cotton ring 23 is made of iron material that has been plated with chrome or the like, and is detachably attached by the magnetic force of a magnet set on the back side of the electrode setting inclined surface 11a.
[0018] The conductor grip 30 is a component that serves as a conductive secondary electrode when the electrode 20 is the main electrode. The conductor grip 30 is located at the portion of the trunk body 10 that is gripped by the user and is incorporated at a position that connects the front panel 11 and the body panel 12. The overall shape of the conductor grip 30 is a rectangle that matches the outer periphery of the front panel 11. The cross section of the conductor grip 30 is an inverted L-shape that has a width that matches the outline of the front panel 11 and a depth that increases toward the body panel 12. The conductor grip 30 is a resin molded product coated with a conductive metal, and is manufactured, for example, by chrome-plating a resin molded product made of EBS resin.
[0019] As shown in Fig. 2, battery power supply 40 is a circuit power supply that supplies a DC voltage (e.g., 5 V) to electric circuit board 50. As shown in Fig. 2, battery power supply 40 is built into body main body 10, and uses a rechargeable battery such as a lithium-ion battery or a nickel-metal hydride battery. Note that cosmetic device E is provided with a female connector terminal (not shown) on its bottom surface to which a male connector terminal from an external charger is connected.
[0020] The electric circuit board 50 is connected to the electrodes 20 and the conductive grip 30, and generates a predetermined energization signal based on the battery power supply 40. As shown in Fig. 2, the electric circuit board 50 is built into the trunk main body 10 together with the battery power supply 40. The detailed configuration of the electric circuit board 50 will be described later.
[0021] The power & mode selection switch 60 is a switch that functions both as a power switch and a mode selection switch, and has a power & mode selection button 61 formed on the front panel 11. This power & mode selection switch 60 functions as a power on / off switch when the power & mode selection button 61 is pressed and held down, and functions as a mode selection switch when the button is pressed normally while the power is on. When a mode is selected by pressing the power & mode selection switch 60, one of the characters "CLEAN," "LIFT," or "HEAT" lights up in white below the power & mode selection button 61 to indicate the selected mode. The front panel 11 also has a white LED light unit 62 behind the position where "CLEAN," "LIFT," or "HEAT" is displayed, and the selected mode is indicated by switching the lighting position.
[0022] The level switch 70 is a switch for selecting an intensity level, and has a level button 71 formed on the front panel 11. When the lift mode or heat mode is selected, the level switch 70 functions to select an intensity level from multiple levels (for example, five levels) by pressing the level button 71. When an intensity level is selected by operating the switch, the level switch 70 displays a vertical row of circles, the number of which represents the selected intensity level, lit in white above the level button 71. The front panel 11 also has a white LED light unit 72 behind the position where the circles are displayed, and the intensity level is displayed by switching the number of circles lit.
[0023] [Beauty device electrical system configuration (Fig. 4, Fig. 5)] 4, the electrical system of the cosmetic device E includes a circuit output system including the electrodes 20 and conductive grip 30, an electric circuit board 50 to which the battery power supply 40 is connected, and a circuit input system including a power supply & mode selection switch 60 and a level switch 70. In addition to the electrodes 20 and conductive grip 30, the circuit output system also includes a blue / red LED lamp unit 22, a white LED lamp unit 62, and a white LED lamp unit 72, whose on / off state is controlled by an LED operation control circuit (not shown).
[0024] The electric circuit board 50 has a first energization signal generating circuit 51 that operates when the clean mode is selected, a second energization signal generating circuit 52 that operates when the lift mode is selected, and a third energization signal generating circuit 53 that operates when the heat mode is selected. The first energization signal generating circuit 51 corresponds to the energization signal generating circuit described in the claims.
[0025] When the clean mode is selected, the first energization signal generating circuit 51 has a basic circuit that sets the electrode voltage higher than the conductor grip voltage as the energization signal output to the electrode 20 and the conductor grip 30 in order to adsorb and remove dirt from the skin by ion derivation.
[0026] The second energization signal generating circuit 52 has a basic circuit that generates two output waves in the mid-frequency range with a frequency difference as energization signals to be output to each of the two pairs of electrodes 20 in order to electrically stimulate the muscles using interference waves and increase the muscle mass present in the deep layers of the skin when the lift mode is selected.
[0027] The third energization signal generating circuit 53 has a basic circuit that generates a radio frequency wave with frequency waveform characteristics that fluctuate in a predetermined high frequency range as an energization signal to be output to the electrode 20 when the heat mode is selected, in order to apply a thermal stimulus to the skin and improve skin metabolism.
[0028] The first energization signal generating circuit 51 sets the electrode voltage higher than the conductor grip voltage and generates an energization signal by adding an amplitude-modulated current of a sine wave whose amplitude is modulated by a frequency in the ultra-low frequency range to a square-wave pulse current. This first energization signal generating circuit 51 has a voltage setting unit 511, a square-wave generating unit 512, an amplitude-modulated sine wave generating unit 513, and an energization signal generating unit 514.
[0029] The voltage setting unit 511 sets the square wave voltage and the sine wave voltage. In this embodiment, the square wave voltage is set to a fixed voltage of 21 Vpp, and the sine wave voltage is set to 1.5 V. In other words, instead of allowing for multiple levels to be selected based on the voltage difference, the square wave voltage is set to 21 Vpp, resulting in a single fixed level. The square wave voltage of 21 Vpp is the voltage between the two pairs of electrodes 20 and the voltage difference between the electrodes 20 and the conductor grip 30. The voltage peaks are 21 Vpp between the two pairs of electrodes 20 and between the electrodes 20 and the conductor grip 30. However, the average voltage between the electrodes 20 and the conductor grip 30 is higher than the average voltage between the two pairs of electrodes 20. The 21 Vpp between the two pairs of electrodes 20 results in an electrical pulse with a lower duty ratio than the current between the electrodes 20 and the conductor grip 30.
[0030] The square wave generating unit 512 generates a series of rectangular waves with a predetermined duty ratio and a frequency in the mid-frequency range, and generates a rectangular wave for the electrode and a rectangular wave for the conductor grip by a square wave number distribution such that the number of rectangular waves for the electrode 20 is greater than the number of rectangular waves for the conductor grip 30. Here, the frequency in the mid-frequency range is set to a frequency within the range of 1 kHz to 10 kHz. In this embodiment, the predetermined duty ratio is set to 50%, and the square wave frequency is set to 21 Vpp to 4.2 kHz.
[0031] The square wave generating unit 512 divides the continuous square waves into cycle units, each cycle consisting of a predetermined number of square waves. The square wave generating unit 512 generates square waves for the electrode 20 and square waves for the conductor grip by setting the ratio of the predetermined number of square waves to be higher than the ratio of the square waves to be used for the conductor grip 30. In this embodiment, the predetermined number of square waves in one cycle is set to 10, and by dividing this ratio at an 8:2 ratio, the number of square waves for the electrode is set to 8 and the number of square waves for the conductor grip is set to 2. Therefore, the square wave characteristics for the electrode are 8 / 10 square wave characteristics as shown in FIG. 5(a), and the square wave characteristics for the conductor grip are 2 / 10 square wave characteristics as shown in FIG. 5(b).
[0032] The amplitude-modulated sine wave generator 513 generates an amplitude-modulated sine wave whose amplitude is modulated by a frequency in the ultra-low frequency range in order to form gaps between cells by electroporation. Here, the frequency in the ultra-low frequency range is set to 1.0 Hz or less, and the amplitude modulation percentage is set to a percentage value less than 8%. In this embodiment, the frequency in the ultra-low frequency range is set to 1.5 V to 0.66 Hz, and the amplitude modulation percentage is set to 3.6%. Therefore, the amplitude-modulated sine wave characteristics become waveform characteristics due to amplitude modulation, as shown in FIG. 5(c).
[0033] The energization signal generating unit 514 generates a first energization signal to be output to the electrode 20 by adding an amplitude-modulated sine wave to the rectangular wave for the electrode, and generates a second energization signal to be output to the conductor grip 30 by adding an amplitude-modulated sine wave to the rectangular wave for the conductor grip.
[0034] [How to use the beauty device] When a user selects clean mode to remove skin impurities, the user covers the electrode 20 and electrode base 21 of the cosmetic device E with cotton soaked in purified water, ion-extracting lotion, or the like. The user then uses the cotton ring 23 to magnetically secure the outer periphery of the cotton to the electrode setting inclined surface 11a of the front panel 11. The user then presses and holds the power and mode selection button 61. The power is turned on by the long-press operation, and clean mode is selected as the initial mode. The user can confirm that clean mode has been selected by the word “CLEAN” being displayed below the power and mode selection button 61, indicating that clean mode has been selected. While holding the cosmetic device E, the user presses the cotton covering the electrode end surface 20c of the electrode 20 against the area of the face or other area from which they wish to remove impurities, and the impurities are removed from the skin at the pressed area.
[0035] When a user wants to apply electrical stimulation to facial muscles by selecting lift mode, if the user presses the power and mode selection button 61 of the beauty device E in the normal manner while clean mode is selected, the mode selection switches from clean mode to lift mode. When the user performs the normal button press, the text displayed below the power and mode selection button 61 changes from "CLEAN" to "LIFT," allowing the user to confirm that the selection has been switched to lift mode. Then, while holding the beauty device E, the user presses the electrode end surface 20c of the electrode 20 against the area of the face they want to lift, and electrical stimulation is applied to the muscles in the pressed area.
[0036] When a user wants to apply a thermal stimulus to the skin by selecting heat mode, if the user presses the power and mode selection button 61 of the beauty device E in the normal manner while the lift mode is selected, the mode selection will switch from lift mode to heat mode. When the user performs the normal button press, the text displayed below the power and mode selection button 61 will simultaneously change from "LIFT" to "HEAT," confirming that the selection has been switched to heat mode. Then, while still holding the beauty device E, the user presses the electrode end surface 20c of the electrode 20 against the area of the face where they want to improve wrinkles or skin elasticity, and a thermal stimulus will be applied to the skin in the pressed area.
[0037] When the user wants to increase the electrical stimulation applied to the muscles when the lift mode is selected, or when the user wants to increase the thermal stimulation applied to the skin when the heat mode is selected, the user uses the level button 71 of the level switch 70. When the user presses the level button 71 located above the power & mode selection button 61 once, level 2, one level higher than level 1 (the initial intensity level), is selected with a single button press. Then, when the user presses the button twice, level 3, one level higher than level 2, is selected, and so on. The intensity level increases up to a maximum of five levels depending on the number of presses. The number of circles corresponding to the currently selected intensity level is displayed by the white LED light unit 72 at the top of the level button 71, and the user can confirm the selected intensity level by the number of circles lit. Note that, to return to level 1, pressing the level button 71 when level 5 has been reached returns to level 1 (the initial intensity level).
[0038] [Clean mode removes dirt from the skin] Conventionally, circuits that generate an electrical signal for removing skin impurities have been known that simply use a weak direct current to set a voltage difference between a main electrode and an auxiliary electrode. When removing skin impurities using a beauty tool equipped with a conventional circuit, the positively charged main electrode is pressed against the skin, causing negatively charged impurities such as sebum and dust to be adsorbed to the main electrode and removed. Thus, conventional technology removes impurities by using the electrical force of ions drawn from the positively charged electrode to move negatively charged impurities toward the electrode. Therefore, when removing internal impurities present deep within the skin, if the gap necessary for the impurities to pass through to the surface of the skin is blocked, the internal impurities cannot be removed even by ion drawing.
[0039] In contrast, the first energization signal generating circuit 51 sets the electrode voltage higher than the conductor grip voltage, and is configured to generate an energization signal by adding an amplitude-modulated current based on a sine wave whose amplitude is modulated by a frequency in the ultra-low frequency range to a pulse current based on a rectangular wave.
[0040] Therefore, while holding the beauty device E with the clean mode selected, the user presses the cotton covering the electrode end surface 20c of the electrode 20 against the area of the face or other area from which dirt needs to be removed. In this state, when the electrode is in the rectangular wave region, current flows from the electrode 20 to the conductive grip 30 due to the voltage difference setting, and ions flow from the conductive grip 30 through the skin toward the electrode 20 (in the opposite direction to the current). As a result, negatively charged surface dirt on the skin is moved toward the cotton covering the electrode 20 by the ion derivation action, which moves the dirt using the positive electrical force of the electrode 20. Therefore, surface dirt on the skin, such as sebum and dust, is adsorbed to the cotton covering the electrode 20 and removed by the ion derivation action. Here, the ion derivation action refers to the action of moving negatively charged substances using the force of positive electricity that attracts negatively charged substances.
[0041] Additionally, when the user presses the cotton covering the electrode end surface 20c against the skin in the same manner as described above, the amplitude-modulated sine wave generated by the amplitude-modulated sine wave generator 513 is applied to the skin from the electrode 20 and the conductive grip 30. This amplitude-modulated sine wave becomes an amplitude-modulated current, which applies an electrical pulse stimulus to the skin from the electrode 20 and the conductive grip 30, thereby creating an electroporation effect that opens minute gaps between cells in the cellular tissue that makes up the skin. The opening of minute gaps between cells creates a pathway that leads internal dirt present deep within the skin to the outside. Therefore, the internal dirt deep within the skin moves to the outside of the skin due to the synergistic effect of the ion extraction effect and the electroporation effect that opens minute gaps between cells, and is then adsorbed to the cotton covering the electrode 20 and removed.
[0042] In this way, when the clean mode is selected, the beauty device E uses an amplitude-modulated current to create an electroporation effect that opens intercellular gaps. The electroporation effect opens intercellular gaps, allowing the beauty device E in clean mode to effectively remove not only surface dirt but also internal dirt deep within the skin when removing it through ion extraction.
[0043] [Effects of Beauty Device E] (1) The cosmetic device E includes a body 10, an electrode 20 arranged on the body 10 at a position where it will come into contact with the skin, a conductive grip 30 arranged on the body 10 at a position where it will be held by the user, and an electric circuit board 50 connected to the electrode 20 and the conductive grip 30 and generating a predetermined energization signal based on a DC power source. The electric circuit board 50 has an energization signal generation circuit (first energization signal generation circuit 51) that sets the electrode voltage higher than the conductive grip voltage as the energization signal and generates a signal by adding an amplitude-modulated current based on a sine wave whose amplitude is modulated by a frequency in the ultra-low frequency range to a square-wave pulse current. This invention can effectively remove not only surface dirt but also internal dirt deep inside the skin when removing dirt by ion derivation. As a result, the beauty device E can meet the user's demand for clean skin by removing not only surface dirt but also internal dirt.
[0044] (2) The first energization signal generating circuit 51 includes a voltage setting unit 511 that sets a rectangular wave voltage and a sine wave voltage; a rectangular wave generating unit 512 that generates a rectangular wave for the electrode and a rectangular wave for the conductor grip by a rectangular wave number distribution among successive rectangular waves with a predetermined duty ratio and a frequency in the mid-frequency range such that the number of rectangular waves for the electrode 20 is greater than the number of rectangular waves for the conductor grip 30; an amplitude-modulated sine wave generating unit 513 that generates an amplitude-modulated sine wave that is amplitude-modulated by a frequency in the ultra-low frequency range; and an energization signal generating unit 514 that adds an amplitude-modulated sine wave to the rectangular wave for the electrode to generate a first energization signal to be output to the electrode 20 and adds an amplitude-modulated sine wave to the rectangular wave for the conductor grip to generate a second energization signal to be output to the conductor grip 30. This invention allows for both a setting in which the ion extraction effect is dominant and a setting in which the electroporation effect is effective when a rectangular wave pulse current is continuously applied to the skin from the electrode 20 and the conductive grip 30.
[0045] (3) The rectangular wave generating unit 512 divides the continuous rectangular waves into cycle units, each cycle consisting of a predetermined number of rectangular waves, and generates a rectangular wave for the electrode and a rectangular wave for the conductor grip by setting the occupancy ratio of the predetermined number of rectangular waves by the rectangular wave number for the electrode 20 to be higher than the occupancy ratio of the rectangular wave number for the conductor grip 30. According to the present invention, when the ion extraction effect is set to be dominant, the occupation ratio of the square wave number is set in cycle units, so that the setting can be made without causing discomfort to the user while ensuring a high degree of freedom in the setting.
[0046] (4) The square wave generating unit 512 sets the frequency of the mid-frequency range to a frequency within the range of 1 KHz to 10 KHz. This invention can prevent the face from receiving an electric shock during the ion extraction process when a square-wave pulse current is applied to the skin from the electrode 20 and the conductive grip 30. For example, experiments have confirmed that a low frequency of less than 1 kHz can cause an electric shock during the ion extraction process. It is more preferable to set the mid-frequency range to a frequency between 2.0 kHz and 6.0 kHz (4.2 kHz in this embodiment) within the range of 1 kHz to 10 kHz.
[0047] (5) When amplitude-modulated sine wave generating unit 513 generates an amplitude-modulated sine wave using a frequency in the ultra-low frequency range, it sets the frequency in the ultra-low frequency range to a frequency of 1.0 Hz or less. This invention can soften the electrical stimulation experienced by the user when a sine wave amplitude modulated current is applied to the skin from the electrode 20 and the conductive grip 30. For example, experiments have confirmed that when the frequency exceeds 1.0 Hz, the peak and valley values fluctuate significantly, and the electrical stimulation experienced by the user is too strong. It is more preferable to set the frequency of the ultra-low frequency range below 1.0 Hz to a frequency between 0.4 Hz and 0.8 Hz (0.66 Hz in this embodiment).
[0048] (6) When generating an amplitude-modulated sine wave by amplitude modulation, the amplitude-modulated sine wave generating unit 513 sets the percentage value of the amplitude modulation to a value smaller than 8%. This invention can reduce the sensation of an electric shock on the skin when a sine wave amplitude modulated current is applied to the skin from the electrode 20 and the conductor grip 30. For example, experiments have confirmed that when the amplitude modulation percentage is set to 8%, the sensation of an electric shock on the skin is too strong. Note that the amplitude modulation percentage is preferably a percentage value smaller than 8% that falls within the range of 2% to 5% (3.6% in this embodiment).
[0049] The cosmetic device E of Example 1 has been described above with reference to the drawings. However, the specific configuration of the cosmetic device of the present invention is not limited to Example 1, and design changes and additions are permitted as long as they do not deviate from the gist of the invention according to each claim in the scope of the claims.
[0050] In the first embodiment, the voltage setting unit 511 is configured to set the square wave voltage to 21 Vpp in a single fixed level. However, the voltage setting unit is not limited to a fixed level setting. For example, similar to the "lift mode" and "heat mode," the voltage setting unit may be configured to allow five levels to be selected based on the voltage difference between the electrode and the conductive grip. Furthermore, the voltage setting unit may be configured to allow multiple levels other than five levels to be selected based on the voltage difference. By allowing multiple levels to be selected, the user has the freedom to select an intensity level from multiple levels, which can accommodate individual differences in the intensity level requirements for the clean mode.
[0051] In the first embodiment, the square wave generating unit 512 generates a square wave with a 50% duty ratio and a frequency in the mid-frequency range. This is because many beauty devices tend to have a 50% duty ratio, and users prefer a 50% duty ratio over other ratios. However, the square wave generating unit is not limited to a configuration with a 50% duty ratio, and may be configured with a duty ratio other than 50%, for example.
[0052] In the first embodiment, the square wave generating unit 512 generates a square wave for an electrode and a square wave for a conductor grip by dividing the square wave number of 10 into 8 and 2, with 10 being one cycle. However, the square wave generation is not limited to the configuration using these square wave numbers. The square wave number for one cycle may be, for example, an increased or decreased number from 10. Furthermore, as long as the sum of the square wave number for an electrode and the square wave number for a conductor grip is set to one cycle of square wave number and the ion derivation effect is dominant, the ratio may be divided into various ratios other than the 8:2 ratio (for example, 9:1, 7:3, etc.).
[0053] Example 1 illustrates an example of a beauty device E having a "clean mode," a "lift mode," and a "heat mode" that can be selected by the user. However, the beauty device is not limited to an example having three modes. For example, the beauty device may have a single function with only a "clean mode." The beauty device may have two modes: a "clean mode" and one other mode. The beauty device may have four or more modes including a "clean mode." Furthermore, if the beauty device has multiple modes, the other modes are not limited to "lift mode" and "heat mode" as long as it has at least a "clean mode" or an operating mode equivalent to the "clean mode." [Explanation of symbols]
[0054] E beauty device 10. Body 20 electrodes 30 Conductor Grip 40 Battery power supply (DC power supply) 50 Electrical Circuit Board 51 1st energization signal generation circuit (energization signal generation circuit) 60 Power & Mode Selector Switch 70 Level switch
Claims
1. A cosmetic device comprising: a body main body; an electrode disposed on the body main body at a position where the electrode comes into contact with the skin; a conductive grip disposed on the body main body at a position where the user holds the electrode; and an electric circuit board connected to the electrode and the conductive grip and configured to generate a predetermined electrical signal based on a DC power source, The electric circuit board has an energization signal generating circuit that sets the electrode voltage higher than the conductor grip voltage and generates a signal by adding an amplitude-modulated current based on a sine wave whose amplitude is modulated by a frequency in the ultra-low frequency range to a pulse current based on a square wave. This is a beauty device that features the following.
2. The beauty device according to claim 1, The energization signal generating circuit includes: a voltage setting unit that sets a square wave voltage and a sine wave voltage; a rectangular wave generating unit that generates rectangular waves for the electrode and rectangular waves for the conductor grip by a rectangular wave number distribution in which the number of rectangular waves for the electrode is greater than the number of rectangular waves for the conductor grip, among successive rectangular waves with a predetermined duty ratio and a frequency in the medium frequency range; an amplitude-modulated sine wave generating unit that generates an amplitude-modulated sine wave that is amplitude-modulated by a frequency in the ultra-low frequency range; an energization signal generating unit that generates a first energization signal to be output to the electrode by adding the amplitude-modulated sine wave to the electrode rectangular wave, and generates a second energization signal to be output to the conductor grip by adding the amplitude-modulated sine wave to the conductor grip rectangular wave. This is a beauty device that features the following.
3. The beauty device according to claim 2, The rectangular wave generating unit divides the continuous rectangular wave into cycle units, each cycle consisting of a predetermined number of rectangular waves, and generates the rectangular wave for the electrode and the rectangular wave for the conductor grip by setting the occupation ratio of the predetermined number of rectangular waves by the number of rectangular waves for the electrode to be higher than the occupation ratio of the number of rectangular waves for the conductor grip. This is a beauty device that features the following.
4. The beauty device according to claim 3, The square wave generating unit sets the frequency of the mid-frequency range to a frequency included in the range of 1 KHz to 10 KHz. A beauty device characterized by:
5. The beauty device according to any one of claims 2 to 4, When the amplitude-modulated sine wave generating unit generates the amplitude-modulated sine wave using a frequency in an ultra-low frequency range, the frequency in the ultra-low frequency range is set to a frequency of 1.0 Hz or less. A beauty device characterized by:
6. The beauty device according to claim 5, When the amplitude-modulated sine wave generating unit generates the amplitude-modulated sine wave by amplitude modulation, the amplitude modulation percentage value is set to a value smaller than 8%. A beauty device characterized by:
Citation Information
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