JP7411831B2 - beauty treatment equipment - Google Patents

Description

The present invention relates to a beauty treatment device.

Patent Document 1 describes a technology for applying beauty treatment to warm the skin from deep inside by bringing electrodes into contact with the user's face, limbs, etc. and passing a high-frequency current through the skin between the electrodes.

JP2016-187732

The effects of beauty treatment obtained by passing an electric current through the skin vary depending on individual differences and physical condition, and when using lotion, it also changes depending on the type of lotion. The technique disclosed in Patent Document 1 does not take into consideration how to respond to changes in these situations.
Therefore, an object of the present invention is to reduce fluctuations in the effect of beauty treatment when the situation changes.

The present invention provides an electrode unit including a first electrode and a second electrode, a first power supply unit that applies a first voltage that is an AC voltage between the first and second electrodes, and A beauty treatment device is provided, which includes a measurement section that measures a resistance value between electrodes, and a control section that controls the first voltage according to the measured resistance value.

Furthermore, the control unit may increase the first voltage as the measured resistance value increases.

Furthermore, the control unit may increase the frequency of the first voltage as the measured resistance value increases.

Further, a second voltage may be a DC voltage, a pulse voltage, or an AC voltage whose polarity is reversed between a grip portion held by the user, a third electrode provided on the grip portion, and the electrode portion and the third electrode. and a second power supply section for applying voltage, and the control section may control the first voltage and the second voltage according to the measured resistance value.

Further, the control unit may increase the second voltage as the measured resistance value increases.

Further, the control unit controls the first period in which the first voltage is applied and the second period in which the second voltage is applied to occur alternately, and the larger the measured resistance value is, the longer the first period is. And at least one of the second period may be lengthened.

Further, a columnar portion having a mounting surface to which the electrode portion is attached and having a circular cross section, and an annular magnetic body having an inner diameter larger than an outer circumference of the columnar portion are fitted into the columnar portion. a stopper that stops the magnetic body when the magnetic body is attracted to the magnetic body, and a stopper that is provided with a magnet that attracts the magnetic body; The columnar portion may be sandwiched and fixed.

Further, the stopper may have a portion whose size in the radial direction of the circle is smaller than the circular outer periphery of the magnetic body fitted into the columnar portion.

According to the present invention, it is possible to reduce fluctuations in the effect of beauty treatment when the situation changes.

Diagram showing the appearance of the facial beauty device of the example Diagram showing the front, side, and back of the facial beauty device An enlarged view of the stopper, etc. Diagram showing the functional configuration of a facial beauty device Diagram showing an example of the first control table Diagram showing an example of the second control table Diagram showing an example of the third control table Diagram showing an example of the fourth control table A diagram showing an example of the operation procedure of the facial beauty device 1 in voltage control processing

[1] Example FIG. 1 shows the appearance of a facial beauty device 1 according to an example. In FIG. 1(a), only the external appearance of the facial beauty device 1 is shown, and in FIG. 1(b), the state in which the facial beauty device 1 is covered with cotton 70 is shown. FIG. 2 shows the front, side, and back of the facial beauty device 1. 2(a) shows the front, FIG. 2(b) shows the side, and FIG. 2(c) shows the back.

The facial beauty device 1 is an instrument that mainly performs beauty treatments on the user's face, and is an example of the "beauty treatment device" of the present invention. The facial beauty device 1 includes a head section 10 and a main body 50. The head portion 10 is a portion that is pressed against the user's skin. The main body 50 is a rod-shaped portion having a first surface 51, two second surfaces 52, and a third surface 53, all of which are elongated surfaces, and is a portion that is held by the user. The main body 50 is an example of the "grip section" of the present invention. The head portion 10 is provided at one end of the first surface 51 in the longitudinal direction A1 of the main body 50.

In the facial beauty device 1, the side where the first surface 51 faces, that is, the side where the head part 10 is provided, is the front, the side where the second surface 52 faces, and the third surface 53 faces. The other side is the back. The first surface 51 is provided with operation buttons 54 that are operated by the user.
The operation button 54 may be a touch-type switch displayed on a liquid crystal panel, or may be a mechanical switch. The operation button 54 accepts an operation for selecting an operation mode of the facial beauty device 1 and an operation for starting operation in the selected operation mode.

In this embodiment, a configuration related to an operation in a cleansing mode in which dirt is removed from the skin while performing deep layer heating to warm the deep layers of the skin will be described. The head section 10 includes an electrode section 20, a columnar section 30, and a stopper 40. The deep heating and dirt removal described above are both performed by passing an electric current through the skin. The electrode section 20 is a section that includes an electrode to which a voltage is applied to cause a current to flow through the skin during deep heating and dirt removal. Hereinafter, the voltage for deep heating will be referred to as a "first voltage", and the voltage for removing dirt will be referred to as a "second voltage". The electrode section 20 includes a first electrode 21 and a second electrode 22.

The first electrode 21 is an electrode with a circular outer periphery, and in this embodiment, is an annular electrode with an opening at the center. The second electrode 22 is an annular electrode with an open center, and is arranged concentrically with the first electrode 21 and outside the outer periphery of the first electrode 21 . Due to these shapes and arrangements, the distance between the first electrode 21 and the second electrode 22 is constant anywhere on the circumference. A high frequency voltage (voltage indicating high frequency, also referred to as RF (Radio Frequency) voltage) is applied between the first electrode 21 and the second electrode 22 as the first voltage described above.

The columnar portion 30 is a columnar portion with a circular cross section, and in this embodiment, has a cylindrical shape. The columnar section 30 has a bottom surface 31 and a side surface 32, and the electrode section 20 is attached to the bottom surface 31. The bottom surface 31 is an example of the "mounting surface" of the present invention. The columnar portion 30 has a casing that forms an internal space in which wiring and the like are arranged, and the casing is made of an electrically insulating material such as plastic, nonmetal, or ceramic. As a result, even if a voltage is applied to the electrode section 20, the current does not flow through the housing of the columnar section 30, but instead flows through the user's skin.

A ring 60 is fitted into the columnar part 30. The ring 60 is an annular magnetic body having an inner diameter larger than the outer circumference of the columnar portion. The ring 60 is made of a ferromagnetic material such as iron, cobalt, nickel, an alloy thereof, or ferrite. The stopper 40 is connected to the opposite side of the bottom surface 31 of the columnar section 30, and is a portion that stops the ring 60 when the ring 60 is fitted into the columnar section 30.

The stopper 40 has a magnet part 41 and a notch part 42. The magnet part 41 has four magnets, each of which is embedded in the stopper 40 in this embodiment. The bottom surface 31 of the columnar part 30 is covered with cotton 70 made of cotton fibers formed into a sheet shape, as shown in FIG. 1(b). Cotton 70 is an example of the "porous covering" of the present invention. In this way, the cotton 70 covering the bottom surface 31 is sandwiched and fixed between the ring 60 attracted by the magnet part 41 and the columnar part 30 (specifically, its side surface 32).

The stopper 40 has an annular shape, and a notch 42 is formed by cutting a part of the outer circumferential side of the stopper 40 .
FIG. 3 shows an enlarged view of the stopper 40 and the like. In FIG. 3, the first electrode 21, the second electrode 22, and the ring 60 are shown hatched for easy identification. The first electrode 21, the second electrode 22, the columnar portion 30, and the stopper 40 (the circular outer peripheral portion thereof) are all arranged concentrically about the center point P1.

Further, the ring 60 fitted into the columnar portion 30 is also approximately concentric with these. Assuming that the direction from the center point P1 toward the outer circumference is the radial direction A2, the cutout portion 42 has a smaller radial dimension than the circular outer circumference of the ring 60 of the stopper 40 that is fitted into the columnar portion 30. It is a part. That is, the dimension B1 of the outer periphery of the ring 60 in the radial direction A2>the dimension B2 of the notch 42 of the stopper 40 in the radial direction A2.

By providing the notch 42, the ring 60 with the cotton 70 fixed thereon can be pushed from the back side, making it easier to remove the ring 60 compared to the case where the notch 42 is not provided. Note that the columnar portion 30, the stopper 40, and the ring 60 only need to have a shape that allows the cotton 70 to be fixed in this manner. For example, the columnar portion may have a truncated cone shape whose cross section becomes smaller as it approaches the bottom surface 31. Further, the stopper may be in the shape of a polygonal plate, or may be in the form of a disc with a radius smaller than the outer periphery of the ring 60 and without a notch (even if the stopper does not stop the ring 60). (This is because the ring 60 can be pushed from the back side.)

A portion of the fixed cotton 70 that covers the bottom surface 31 of the columnar portion 30 serves as a contact portion 71 that comes into contact with the user's skin. The contact portion 71 is a portion to which dirt from the user's skin adheres when the head portion 10 of the facial beauty device 1 operating in the cleansing mode is pressed against the user's skin. In the cleansing mode, the contact portion 71 is impregnated with cleansing lotion to make it easier to remove dirt.

A third electrode 55 is provided on the third surface 53 of the main body 50 . The third electrode 55 is an elongated circular electrode extending from one end of the third surface 53 in the longitudinal direction A1. By providing the third electrode 55 over such a wide range, the third electrode 55 always comes into contact with the user's hand holding the main body 50 . The aforementioned second voltage (voltage for removing dirt) is applied between the third surface 53 and the electrode section 20.

A DC voltage or a pulse voltage is used as the second voltage. A direct current voltage is a voltage that is constant in magnitude and direction and when applied causes a direct current to flow. Note that even if the magnitude is not constant and varies somewhat, if the direction is constant, it may be regarded as a DC voltage. Further, the pulse voltage refers to a voltage obtained by alternately repeating periods in which a DC voltage is applied and periods in which it is not applied. Although a case will be described below in which a pulse voltage is used as the second voltage, a DC voltage may be used instead of the pulse voltage.

FIG. 4 shows the configuration of the electronic circuit of the facial beauty device 1. The facial beauty device 1 includes, in addition to an electrode section 20 having a first electrode 21 and a second electrode 22 and a third electrode 55, a first power supply section 81, a second power supply section 82, a voltage control section 83, and a resistance measuring section. A control circuit board 80 having a section 84 is provided. The control circuit board 80 is a board provided with a circuit for controlling voltage, and is composed of electronic elements (for example, a capacitor, a coil, an IC chip, a memory, etc.).

The first power supply section 81 applies a high frequency voltage as a first voltage between the first electrode 21 and the second electrode 22. The first power supply unit 81 includes an oscillation circuit that generates a high-frequency voltage, a booster circuit that boosts the oscillated voltage, and the like, and applies a high-frequency voltage of about 1 [MHz] to 4 [MHz], for example. When the head unit 10 to which a high-frequency voltage is applied by the first power supply unit 81 is pressed against the user's skin, a high-frequency current flows to the skin through the lotion soaked into the cotton 70 .

Since the distance between the first electrode 21 and the second electrode 22 is constant anywhere on the circumference as described above, the distance between the first electrode 21 and the second electrode 22 is uniform. High frequency current flows. Therefore, it is possible to apply a high frequency current over a wide range and evenly to the user's skin located between the first electrode 21 and the second electrode 22, so that the heat generating area of the user's skin is wide and stimulation due to the current application is reduced. become even. As a result, the amount of heat generated per unit area of the skin is smaller than, for example, when high-frequency current is passed between spherical electrodes. This prevents the user from feeling uncomfortable.

The second power supply section 82 includes an oscillation circuit that generates a pulse voltage, a boost circuit that boosts the oscillated voltage, etc., and includes an electrode section 20 (one or both of the first electrode 21 and the second electrode 22) and a third A pulse voltage is applied between the electrodes 55. When the user grasps the main body 50 of the facial beauty device 1 and presses the head section 10 against the skin, a weak direct current flows into the user's body via the hand touching the third electrode 55 and the lotion soaked into the cotton 70. Current flows.

In the cleansing mode, the second power supply section 82 applies a pulse voltage to the electrode section 20 so that the third electrode 55 side has a negative potential. As a result, the skin side has a negative potential with respect to the head portion 10, and so-called ion derivation is performed in which the negatively charged waste matter, dirt, etc. that have adhered to the skin are adsorbed to the cotton 70. In the facial beauty device 1, deep layer heating using high frequency voltage and dirt removal using pulse voltage are performed alternately.

The voltage control unit 83 controls the high frequency voltage applied by the first power supply unit 81 by controlling the first power supply unit 81, and controls the pulse voltage applied by the second power supply unit 82 by controlling the second power supply unit 82. control. The voltage control section 83 is an example of the "control section" of the present invention. The voltage control unit 83 performs control so that the first period in which the high frequency voltage is applied and the second period in which the pulse voltage is applied occur alternately. The voltage control unit 83 controls, for example, to make both the first period and the second period the same length (for example, about 5 to 15 seconds).

Further, the voltage control section 83 uses the measurement results by the resistance measurement section 84 to control both voltages.
The resistance measuring section 84 measures the resistance value between the first electrode 21 and the second electrode 22. In this embodiment, the resistance measuring section 84 measures electrical resistance as a resistance value. As shown in FIG. 1B, when the cotton 70 is fixed and soaked with lotion (before the head unit 10 is pressed against the user's skin), the resistance measuring unit 84 is connected to the first electrode 21 and Since a current flows through the lotion due to the high frequency voltage applied between the second electrodes 22, the resistance value of the lotion is measured. When the head unit 10 is pressed against the user's skin, a current flows through the lotion to the user's skin, so the resistance measurement unit 84 measures the resistance value indicating the combined resistance of the lotion and the user's skin. Measure.

This resistance value (electrical resistance) changes depending on the user's skin condition, the type of lotion, etc.
For example, it is known that when a high-frequency current is passed through the skin of a human body, the skin generates heat, and as the temperature of the skin increases, the impedance inside the skin gradually decreases. Therefore, as the temperature of the skin increases, the amount of current flowing between the first electrode 21 and the second electrode 22 increases, and the measured resistance value decreases. The resistance measuring section 84 measures the resistance value at predetermined time intervals (for example, every 0.5 seconds), and supplies the measured resistance value to the voltage control section 83 each time.

The voltage control section 83 controls the high frequency voltage and the pulse voltage according to the resistance value thus measured by the resistance measurement section 84. For example, the voltage control unit 83 increases the high frequency voltage (increases the amplitude of the high frequency voltage) as the measured resistance value increases. In order to perform this control, the voltage control unit 83 stores, for example, a first control table that associates resistance value ranges with high frequency voltages.

FIG. 5 shows an example of the first control table. In the example of FIG. 5, high frequency voltages "Vrf1", "Vrf2" and "Vrf3" (Vrf1<Vrf2<Vrf3) are applied to the resistance value ranges "less than R11", "R11 or more and less than R12", and "R12 or more". are associated. When the voltage control unit 83 receives the measurement result from the resistance measurement unit 84, it applies the high frequency voltage that is associated with the resistance value range including the measurement result in the first control table. Thereby, the voltage control unit 83 increases the high frequency voltage as the measured resistance value increases as described above.

The larger the resistance value between the first electrode 21 and the second electrode 22, the smaller the current flowing through the skin when a high frequency voltage is applied, and the more difficult it is to warm the inside of the skin. For example, if the resistance value is less than R11 when lotion α is used, and the resistance value is R12 or more when lotion β is used, the latter is less likely to warm the inside of the skin than the former if the high frequency voltage is the same. Such differences in the ease with which the inside of the skin warms occur due to individual differences in the skin of each user, and also due to differences in the skin condition of the same user.

Therefore, by performing the above control (voltage control by the voltage control unit 83), compared to the case where this control is not performed, it is possible to reduce the amount of damage caused by individual differences in skin, skin condition, and differences in circumstances such as the type of lotion. By reducing the difference in the magnitude of the current flowing through the skin, it is possible to reduce the temperature difference inside the skin (that is, the difference in deep thermal effect). Furthermore, as the skin temperature rises, the resistance value decreases as described above, so the high frequency voltage also decreases. This can also prevent excessive heating of the inside of the skin. Furthermore, as described above, the resistance measuring section 84 measures the resistance value of the lotion even before the head section 10 is pressed against the user's skin, so the head section 10 is more effective than when the above control is not performed. It is possible to reduce the difference in the magnitude of the current flowing through the skin (particularly the difference caused by the difference in the type of lotion) even before it is pressed against the user's skin.

Further, the voltage control unit 83 increases the pulse voltage (increases the DC voltage included in the pulse voltage) as the measured resistance value increases. In order to perform this control, the voltage control unit 83 stores, for example, a second control table that associates resistance value ranges with pulse voltages.
FIG. 6 shows an example of the second control table. In the example of FIG. 6, the pulse voltages "Vp1", "Vp2", and "Vp3"(Vp1<Vp2<Vp3) are applied to the resistance value ranges "less than R21,""R21 or more and less than R22," and "R22 or more." are associated.

When the voltage control unit 83 receives the measurement result from the resistance measurement unit 84, it applies a pulse voltage associated with the resistance value range including the measurement result in the second control table. Thereby, the voltage control unit 83 increases the pulse voltage as the measured resistance value increases as described above.

The larger the resistance value between the first electrode 21 and the second electrode 22, the smaller the current flowing through the skin when a pulse voltage is applied, and the less dirt etc. will be attracted to the cotton 70 (the effect of ion extraction will be smaller). Become). Therefore, by performing the above control, differences in the magnitude of the current flowing through the skin due to individual differences in skin, condition, type of lotion, etc. can be reduced, and dirt etc. adsorbed to the cotton 70 can be reduced. The difference (that is, the difference in the effect of ion extraction) can be reduced.

Further, the voltage control unit 83 increases the first period during which the high frequency voltage is applied as the measured resistance value increases. In order to perform this control, the voltage control unit 83 stores, for example, a third control table that associates resistance value ranges with first periods.
FIG. 7 shows an example of the third control table. In the example of FIG. 7, the resistance value ranges of "less than R31", "more than R31 and less than R32", and "more than R32" are included in the first periods "Trf1", "Trf2", and "Trf3"(Trf1<Trf2<Trf3). ) are associated.

When the voltage control unit 83 receives the measurement result from the resistance measurement unit 84, it applies a high-frequency voltage during a first period that is associated with the resistance value range that includes the measurement result in the third control table. . Thereby, the voltage control unit 83 lengthens the first period (the period during which the high frequency voltage is applied) as the measured resistance value increases, as described above. In this case, in a situation where the inside of the skin is difficult to warm, the first period is lengthened to enhance the deep heating effect.

For example, if the inside of the skin is difficult to warm even when the maximum high-frequency voltage is applied, the deep heating effect can be enhanced by lengthening the first period. On the other hand, if the inside of the skin becomes too warm even when the minimum amount of high-frequency voltage is applied, the deep heating effect can be suppressed by shortening the first period. In addition, even when changing the first period, as with changing the high-frequency voltage, the magnitude of the current flowing through the skin due to individual differences in skin, skin condition, type of lotion, etc. By reducing the difference, the temperature difference inside the skin (that is, the difference in deep thermal effect) can be reduced.

Further, the voltage control unit 83 increases the second period during which the pulse voltage is applied as the measured resistance value increases. In order to perform this control, the voltage control unit 83 stores, for example, a fourth control table that associates resistance value ranges with second periods.
FIG. 8 represents an example of the fourth control table. In the example of FIG. 8, the resistance value ranges "less than R41", "R41 or more and less than R42", and "R42 or more" are included in the first periods "Tp1", "Tp2", and "Tp3"(Tp1<Tp2<Tp3). ) are associated.

When the voltage control unit 83 receives the measurement result from the resistance measurement unit 84, it applies a pulse voltage during a second period that is associated with the resistance value range that includes the measurement result in the fourth control table. . Thereby, the voltage control unit 83 lengthens the second period (the period during which the pulse voltage is applied) as the measured resistance value increases, as described above. In this case, in a situation where dirt or the like is difficult to adsorb to the cotton 70, the second period is lengthened to enhance the effect of ion extraction.

For example, if dirt and the like are not sufficiently adsorbed to the cotton 70 even when the maximum pulse voltage is applied, the effect of ion extraction can be increased by lengthening the second period. In addition, even when changing the second period, as in the case of changing the pulse voltage, the magnitude of the current flowing through the skin due to individual differences in skin, skin condition, and differences in conditions such as the type of lotion etc. By reducing the difference, it is possible to reduce the difference in dirt etc. adsorbed to the cotton 70 (that is, the difference in the effect of ion extraction).

Note that the first to fourth control tables are not limited to those shown in FIGS. 5 to 8. For example, the range of resistance values may be set to two, or may be set to four or more. Further, each of the above controls may be performed using a relational expression between the resistance value, the high frequency voltage, the pulse voltage, and the first period or the second period. In short, any method may be used as long as the higher the resistance value, the higher the high frequency voltage, the higher the pulse voltage, the longer the first period, or the longer the second period.

The facial beauty device 1 performs voltage control processing to control high frequency voltage and pulse voltage based on the above configuration.
FIG. 9 shows an example of the operation procedure of the facial beauty device 1 in voltage control processing. This operation procedure is started when an operation is performed to change the operation mode of the facial beauty device 1 to the cleansing mode and start the operation. First, the facial beauty device 1 (first power supply section 81 or second power supply section 82) starts applying either a high frequency voltage or a pulse voltage (step S10). Which voltage is to be started may be determined in advance, or may be the voltage that was applied at the end of the previous cycle.

Next, the facial beauty device 1 (resistance measurement unit 84) measures the resistance value between the first electrode 21 and the second electrode 22 (step S11). Subsequently, the facial beauty device 1 (voltage control unit 83) determines the high frequency voltage to be applied based on the measured resistance value (step S12). Next, the facial beauty device 1 (voltage control unit 83) determines the pulse voltage to be applied based on the measured resistance value (step S13). Subsequently, the facial beauty device 1 (voltage control unit 83) determines a first period and a second period based on the measured resistance value (step S14). Note that the operations in steps S12 to S14 may be performed in a different order or in parallel.

Next, the facial beauty device 1 (voltage control unit 83) determines whether the measurement interval has elapsed (step S21), and if it is determined that the measurement interval has elapsed (YES), returns to step S11 (resistance value measurement). perform the operation. If the facial beauty device 1 (voltage control unit 83) determines that the elapsed time has not elapsed (NO), the application period (the first period if a high frequency voltage is currently being applied, or the first period if a pulse voltage is being applied). It is determined whether the second period) has elapsed (step S22).

If the facial beauty device 1 (voltage control unit 83) determines in step S22 that the interval has not elapsed (NO), it returns to step S21 (determining whether the measurement interval has elapsed) and performs the operation, and determines that the interval has elapsed (YES). If so, change the type of voltage to be applied (if a high frequency voltage is currently being applied, change to a pulse voltage; if a pulse voltage is currently being applied, change to a high frequency voltage) (step S23). After step S23, the facial beauty device 1 (voltage control unit 83) returns to step S21 (determining whether the measurement interval has elapsed) and performs the operation.

In this example, by controlling the high-frequency voltage and pulse voltage as described above, differences in the magnitude of the current flowing through the skin due to individual differences in skin, skin conditions, and differences in conditions such as the type of lotion are eliminated. By making it small, the difference in deep thermal effect and the effect of ion extraction are reduced. In this way, according to the present embodiment, it is possible to reduce fluctuations in the effects of beauty treatment (deep heating effect and ion derivation effect) when the situation changes.

Further, in this embodiment, cleansing is performed by ion extraction while warming the inside of the skin by alternately applying a high frequency voltage and a pulse voltage. As mentioned above, the warmer the inside of the skin, the easier the current will flow, so in this example, by simultaneously performing deep heating, the effect of ion extraction can be enhanced compared to the case where only pulse voltage is applied.

Further, in this embodiment, the ring 60, which is a magnetic material, is attracted by the magnet portion 41 provided on the stopper 40, thereby fixing the cotton 70. When the head section 10 is pressed against the user's skin, the magnetic force generated by the magnet section 41 passes through the ring 60 and reaches the user's skin. As a result, force is applied to the ions in the blood components, increasing their movement and promoting blood circulation. In the facial beauty device 1, by utilizing the mechanism for fixing the cotton 70 (magnet part 41 and ring 60) to promote blood circulation, compared to the case where these are used as separate mechanisms,
It is also possible to downsize the device.

[2] Modifications The embodiments described above are merely examples of implementing the present invention, and may be modified as follows. Furthermore, the embodiments and modifications described above may be implemented in combination as necessary.

[2-1] Frequency Control In the above embodiment, the voltage control section 83 controlled the high frequency voltage, but the frequency of the high frequency voltage may also be controlled. In this case, the voltage control unit 83 increases the frequency of the high-frequency voltage as the measured resistance value increases. The voltage control unit 83 may perform this control using a control table as explained in FIG. 5, or may perform this control using a relational expression between the resistance value and the frequency of the high-frequency voltage.

It is known that the higher the frequency of the high-frequency voltage, the faster the temperature inside the skin rises. Therefore, by controlling the frequency of the high-frequency voltage as in this modification, in the same way as when controlling the high-frequency voltage in the example of FIG. 5, individual differences in skin, skin condition, type of lotion, etc. By reducing the difference in the magnitude of the current flowing through the skin due to the difference, it is possible to reduce the temperature difference inside the skin (i.e. the difference in deep thermal effect), and prevent excessive heating of the inside of the skin. It can also be prevented.

[2-2] Target of voltage control In the above embodiment, the voltage control unit 83 performed all of the high-frequency voltage control, pulse voltage control, first period control, and second period control. At least one or more controls may be performed. Further, the second power supply unit 82 applies the above-mentioned DC voltage instead of the pulse voltage, or applies an AC voltage with the polarity reversed, and the voltage control unit 83 controls these voltages. Good too. Furthermore, the control of the frequency of the high-frequency voltage described in the above modification may be combined. By controlling at least one of the high-frequency voltage, the frequency of the high-frequency voltage, or the first period, it is possible to reduce fluctuations in the deep thermal effect. By controlling either of the two periods, fluctuations in the ion extraction effect can be reduced.

[2-3] Target of beauty treatment In the above embodiment, a facial beauty device, which is a device that mainly performs beauty treatment on the user's face, has been described. The present invention may also be applied to a beauty treatment device that performs beauty treatment on other parts of the body.

[2-4] Porous Covering In the above embodiment, the cotton 70 formed from cotton fibers was used as a porous covering to cover the bottom surface 31 of the columnar part 30, but the invention is not limited to this. Other types of fibers, such as hemp and silk, formed into sheets may also be used as the porous covering. in short,
The porous coating may be made of any material as long as it is soft enough to be placed over the bottom surface 31 of the columnar portion 30, has the property of permeating lotion and adsorbing dirt etc. when pressed against the skin. The body may also be used.

[2-5] Ion Introduction In the above embodiment, the second power supply section 82 applied a pulse voltage to extract ions, but it is also possible to reverse the polarity of the voltage and apply a pulse voltage to introduce ions. You can. In this case, the lotion charged with negative ions will adsorb to the skin and penetrate more easily. In addition, since the skin is warmed to the inside by deep heat and cells are activated, lotion can penetrate even more easily.

[2-6] Operation mode In the above embodiment, the facial beauty device 1 operates in the cleansing mode, but it is not limited to this. For example, it may operate in a mode in which the above-described iontophoresis is performed while performing deep heating, It may operate in a mode in which only deep heating is performed, a mode in which only dirt removal is performed, and a mode in which only ion introduction is performed.

[2-7] Direct contact with the skin In the above embodiment, the facial beauty device 1 was used with the cotton 70 covered on the bottom surface 31 of the columnar part 30, but the facial beauty device 1 was used without the cotton 70 covered. You can. In that case, the resistance value is measured with the first electrode and the second electrode in direct contact with the user's skin by operating the facial beauty device 1, for example, in the mode that only performs deep heating described above, and the measured resistance value is Since a high frequency voltage corresponding to the temperature is applied, similarly to the embodiment, it is possible to reduce fluctuations in the deep thermal effect when conditions such as the skin condition change.

[2-8] First Electrode In the above embodiment, the first electrode had an annular shape with an opening at the center, but it may also have a disk shape with no opening at the center. Even in that case, since the distance between the first electrode and the second electrode is constant no matter where on the circumference, the heat generating area of the user's skin can be widened and the stimulation caused by energization can be made uniform.

[2-9] Electrode Section In the above embodiment, the electrode section includes a first electrode and a second electrode both having an annular shape, but the present invention is not limited to this. The electrode portion may include, for example, a polygonal and annular first electrode and a second electrode, or may include a rod-shaped first electrode and a second electrode arranged in parallel. Regardless of the shape, it is desirable that the distance between the first electrode and the second electrode be the shortest in the area, as this will allow the high-frequency current to flow more uniformly over a wider area.

[2-10] Resistance Value In the above embodiment, the resistance measuring unit 84 measures the electrical resistance (resistance) as the resistance value between the first electrode 21 and the second electrode 22. The reactance between the electrode 21 and the second electrode 22 may be measured as a resistance value. In short, a value representing the difficulty of current flow between the first electrode 21 and the second electrode 22 may be measured as the resistance value. In addition,
A value that represents the ease with which current flows, such as conductance, can also be treated as a resistance value, since its reciprocal value represents the difficulty in current flow.

[2-11] Method for Measuring Resistance Value In the above embodiment, the resistance measuring unit 84 measures the current flowing between the first electrode 21 and the second electrode 22 when a high frequency voltage is applied between the first electrode 21 and the second electrode 22. Although the resistance value between the electrodes 22 was measured, the method for measuring the resistance value is not limited to this. For example, the resistance measurement unit 84 measures the resistance of the first electrode 21 and the second electrode 22 by a current flowing when a measurement voltage (for example, a DC voltage) for measuring the resistance value is applied between the first electrode 21 and the second electrode 22. The resistance value between the two electrodes 22 may also be measured.

In this case, for example, before the first power supply section 81 applies a high frequency voltage for deep heating, a measurement voltage is first applied, the resistance measurement section 84 measures the resistance value, and the resistance measurement section 84 measures the resistance value. By controlling the voltage control unit 83 so that the high frequency voltage and pulse voltage are applied, the difference in the magnitude of the current flowing through the skin can be reduced at the start of the beauty treatment compared to a case where this control is not performed. It can be made smaller from Further, the resistance measuring section 84 may provide another pair of electrodes on the bottom surface 31 of the columnar section 30 and measure the resistance value between them, or a sensor that outputs a value indicating electrical resistance on the bottom surface 31. Alternatively, the resistance value may be measured using the output value.

In short, any method may be used to measure the resistance value as long as it is an indicator of the ease with which current flows in the portion of the user's skin that the head portion 10 is pressed against. In addition, when the resistance measuring section 84 measures the resistance value between the first electrode 21 and the second electrode 22 as in the embodiment, there is no need to provide other electrodes or sensors, so it is less expensive than when they are provided. This allows the device to be made smaller.

DESCRIPTION OF SYMBOLS 1... Facial device, 10... Head part, 20... Electrode part, 21... First electrode, 22... Second electrode, 30... Column part, 31... Bottom surface, 40... Stopper, 41... Magnet part, 42... Notch part , 50...Main body, 55...Third electrode, 60...Ring, 70...Cotton.

Claims (7)

an electrode section including a first electrode and a second electrode;
a first power supply unit that applies a first voltage that is an AC voltage between the first and second electrodes;
a measuring unit that measures a resistance value between the first and second electrodes;
A control unit that increases the frequency of the first voltage as the measured resistance value increases . The beauty treatment device according to claim 1, wherein the control unit increases the first voltage as the measured resistance value increases. The control unit increases the application period of the first voltage as the measured resistance value increases.
The beauty treatment device according to claim 1 or 2. a grip portion held by the user;
a third electrode provided on the grip portion;
A second power supply unit that applies a DC voltage, a pulse voltage, or an AC voltage whose polarity is reversed with respect to the first voltage as a second voltage between the electrode unit and the third electrode,
The control unit further controls the second voltage according to the measured resistance value.
The beauty treatment device according to claim 1 or 2. The control unit increases the second voltage as the measured resistance value increases.
The beauty treatment device according to claim 4. The control unit increases the application period of the second voltage as the measured resistance value increases.
The beauty treatment device according to claim 4 or 5. The control unit controls so that a first period in which the first voltage is applied and a second period in which the second voltage is applied alternate.
The beauty treatment device according to any one of claims 4 to 6.

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