JPS6229063B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a facial beauty device that automatically determines the dryness and wetness of the skin and always supplies a low frequency voltage with an optimal waveform.

Recently, various portable facial beauty devices that use low-frequency voltage have been developed and are gradually becoming popular in general households, but these types of facial beauty devices cannot supply the appropriate low-frequency voltage to the affected area. It is essential. In other words, there are two types of skin: oily skin and rough skin, and in general, the two differ greatly in electrical resistance and low-frequency voltage required for treatment, and they are also sensitive to negative low-frequency voltage. It has the effect of stimulating the skin and nerves and promoting sweating, and conversely, positive low-frequency voltage has the effect of calming the skin and nerves and suppressing sweating, so it is recommended to use it before facial treatment using low-frequency waves. First, it is necessary to determine whether the skin is oily or rough, as well as its degree. However, such determination usually requires expensive equipment and a high level of judgment by experts.
You can easily purchase a commercially available portable low-frequency facial beauty device,
Facial surgery was often performed without realizing that the output voltage was not appropriate for one's skin, resulting in undesirable results.

Therefore, in the case of electronic facial treatment, it is necessary to use a low-frequency treatment device that has the ability to automatically determine the dryness and wetness of the patient's skin simply by touching the electrodes to the patient's skin and always supply the optimal low-frequency voltage. Although this is desirable, such a low-frequency treatment device has not been known so far.

As a result of intensive studies aimed at solving the problem, the inventor of the present invention found that by connecting a galvanic electrode to the output end of a rectangular wave oscillation circuit via a capacitor, the capacitance of the capacitor is applied as a load to the capacitor and the galvanic electrode. The equivalent resistance of the skin to be in contact is set to form a differential circuit that is effective for the oscillation output of the rectangular wave oscillation circuit, and when the skin is rough and the equivalent resistance is relatively high, the voltage is applied to the related electrode. Differentiate the negative voltage component of the low frequency voltage to a degree that increases it slightly,
It has been found that when the skin is oily and the equivalent resistance is relatively low, the purpose can be achieved by using a low frequency treatment device that completely differentiates a rectangular wave and converts it into a low frequency voltage that alternates between positive and negative and supplies it to the skin.

That is, the present invention connects a related electrode to the output end of a rectangular wave oscillation circuit via a capacitor,
The structure of the facial beauty device is characterized in that the capacitance of the capacitor is set so that the capacitor and a load resistor that is in contact with the related electrode form a differential circuit with respect to the oscillation output of the rectangular wave oscillation circuit. This is a summary.

The present invention will be described below with reference to illustrated embodiments.

1 and 2 show a facial care device of the present invention which uses a blocking oscillation circuit and a multivibrator as the rectangular wave oscillation circuit, respectively, and the output end of the rectangular wave oscillation circuit is connected to terminals A and B via a capacitor C. A skin of equivalent resistance R is connected between these terminals as a load.

Figure 3 shows how the voltage waveform across the skin changes depending on the value of the equivalent resistance R of the skin.When the equivalent resistance R is very large relative to the reactance component of the capacitor C, As shown in A, a low frequency voltage with a rectangular waveform almost equal to the input waveform is applied to the equivalent resistance R, and when the product of the capacitance of the capacitor C and the load resistance approaches the pulse width τ of the rectangular wave, the output is output. The waveform is capacitor C
is differentiated by a differentiating circuit consisting of an equivalent resistance R, and the negative voltage component increases as shown in FIG.
When the value of the product becomes smaller than τ, the output waveform becomes an almost completely differential waveform as shown in FIG. 3C. At this time, the capacitance of capacitor C was 0.01 microfarads, and the equivalent resistance R was 1 megohm in case A of Figure 3, 20 kilohms in case b, and 5 kilohms in case c. Normally, the equivalent resistance R of the skin is about several tens of kilohms to several hundred kilohms in the case of rough skin, and several kilohms to several tens of kilohms in the case of oily skin. By setting the time constant to vary from approximately the pulse width τ of the square wave to a smaller range to form a differential circuit that is effective for the square wave, the voltage is automatically applied depending on the skin condition. This means that the waveform of the applied voltage can be changed.

The inventor conducted an experiment and found that the frequency range was 5 to 5.
For square waves of 50 hertz, preferably 10 to 30 hertz, a range of 0.0001 to 0.1 microfarads, preferably 0.005 to 0.05 microfarads, has generally been suitable.

FIG. 4 shows an external view of the facial beauty device of the present invention,
A roll holding stand 2 made of a metal plate or the like is provided on the surface of the apparatus main body 1, and supports water-retentive sponge roll electrodes 3, 3. The main body 1 is equipped with a square wave oscillation circuit 4 and a battery 5. Interior. One or more water-retaining sponge roll electrodes 3 can be provided, but it is recommended to provide two or more in order to make good contact with the skin, equalize the current density, and make it easier to handle. good.

To explain how to use the facial beauty device of the present invention, first, the electrodes 3 are impregnated with water or an appropriate medicinal solution, and then the device body 1 is held and the electrodes are brought into contact with the affected skin and a low frequency voltage is applied. do it. The low-frequency voltage is applied continuously or with breaks as appropriate while observing the condition of the affected area, and is applied at a voltage of several tens of positive and negative volts, preferably up to several positive and negative volts, and approximately 1
The current may be applied within a range of 30 to 30 milliamps, preferably 5 to 20 milliamps.

As mentioned above, the facial beauty device of the present invention is configured to supply a low-frequency voltage with an optimal waveform simply by contacting the electrode with the skin, so the degree of oiliness and roughness of the skin can be determined each time it is used. Therefore, there is no need to use a switch or the like to select a low frequency voltage according to the degree of the problem.

In addition, despite such functions, the facial beauty device of the present invention can be extremely lightweight, so it has the practical benefit of being able to be carried freely and performing full-scale facial beauty treatments comfortably.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention in which a blocking oscillation circuit is used as the rectangular wave oscillation circuit, and FIG.
An embodiment of the present invention using a multivibrator as a rectangular wave oscillation circuit, FIG. 3 shows how the output waveform changes depending on the equivalent resistance of the skin.
FIG. 4 shows an external view of the facial beauty device of the present invention. The symbols in the figure are explained as follows. 1
2 is the facial beauty device body, 2 is an electrode holding stand, 3 is a water-retentive sponge roll electrode, 4 is a square wave oscillation circuit, and 5 is a battery.

Claims (1)

[Scope of Claims] 1. A rectangular wave oscillator circuit has a capacitor connected to its output end via a capacitor, and the capacitance of the capacitor is equal to the capacitance of the capacitor and the load resistor that is to be in contact with the resistor electrode. A facial beauty device characterized by being set to form a differential circuit for the oscillation output of a wave oscillation circuit. 2. The facial beauty device according to claim 1, wherein the rectangular wave oscillation circuit is a blocking oscillation circuit or a multivibrator. 3. The facial beauty device according to claim 1 or 2, wherein the electrode is formed in the shape of a sponge roll from a water-retentive material. 4. The facial beauty device according to claim 1, 2 or 3, wherein the capacitance of the capacitor is in the range of 0.0001 to 0.1 microfarads. 5 Claim 1, characterized in that it is for treating oily or rough skin;
The facial beauty device according to item 2, 3, or 4.