Electric shock prevention circuit for electric potential therapy devices

Abstract

The present invention relates to an electric shock prevention circuit for an electric potential therapy device, which can maintain a constant output current by adjusting the output resistance or maintaining a constant input or output voltage, thereby preventing the user from feeling uneasy due to a sudden change in the electric shock sensation.

Description

[Technical Field]

[0001] The present invention relates to a device for treating the human body using an electric potential difference, and more particularly to a technique for preventing electric shocks that occur during treatment. [Background technology]

[0002] An electric potential therapy device is a device that generates an electric field around the human body and stimulates the human body with that field to achieve a therapeutic effect.

[0003] For this reason, electric potential therapy devices apply high voltage to the insulated human body, but since the floor and walls of the room surrounding the human body are close to the earth, which has a potential of 0V, an electric field is formed between the high voltage and the earth, which is the floor or wall.

[0004] Such electric potential therapy devices output different electric potentials depending on the treatment area, and therefore the amount of output current changes, which causes the electric shock sensation felt by the user to vary. If the electric shock sensation changes due to changes in current, the user may feel psychologically uneasy and may even become averse to the electric potential therapy device, which can cause problems with smooth treatment.

[0005] The inventors of the present invention have been researching and working to solve the problem of electric shock sensation in conventional electric potential therapy devices. As a result of extensive efforts to complete an electric shock prevention circuit for an electric potential therapy device that can equalize the amount of electric potential change to prevent shock to the user due to voltage changes in the electric potential therapy device, the present invention has been completed. Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide an electric shock prevention circuit for an electric potential therapy device that can reduce the shock to the user caused by changes in electric potential.

[0007] On the other hand, other objects of the present invention not explicitly stated will be considered within the scope that can be easily inferred from the detailed description below and the effects thereof. [Means for solving the problem]

[0008] The electric shock prevention circuit of the electric potential therapy device according to the present invention includes a power supply input section to which an AC power supply is input; a transformer section having an input tap connected to the power supply input section and two or more output taps; two or more output resistors each having one end connected to one of the two or more output taps and having resistance values ​​proportional to the voltages of the output taps; a switch section connected to the other ends of the two or more output resistors for selectively outputting the voltages of the two or more output taps; and an output section connected to the switch section.

[0009] The resistance values ​​of the two or more output resistors are adjusted so that the output currents of the two or more output taps are the same.

[0010] The power supply unit further includes a voltage measuring unit for measuring the voltage of the power supply input unit; an input switch unit for adjusting the voltage input to the input tap of the transformer unit according to a switching duty; and a control unit for adjusting the switching duty of the input switch unit according to the voltage measured by the voltage measuring unit to keep the voltage input to the input tap of the transformer unit constant.

[0011] The transformer further includes a voltage measuring unit for measuring a voltage at an output tap of the transformer; an input switch unit for adjusting a voltage input to an input tap of the transformer according to a switching duty; and a control unit for adjusting a switching duty of the input switch unit according to the voltage measured by the voltage measuring unit to keep the voltage input to the input tap of the transformer constant.

[0012] The power supply may further include an AC-DC transformer unit that converts the AC voltage of the power input unit into a DC voltage; and an inverter unit that converts the DC voltage output from the AC-DC transformer unit into an AC voltage and transmits it to an input tap of the transformer unit.

[0013] The output resistor is a variable resistor, and the power supply may further include a power supply measuring unit for measuring the voltage of the power supply input unit or the voltage of the output tap of the transformer; and a control unit for adjusting the resistance value of the output resistor according to the voltage measured by the power supply measuring unit. [Effects of the Invention]

[0014] According to the present invention, by applying a resistance according to the output voltage to the secondary side of the transformer for potential output, it is possible to minimize the impact caused by voltage changes and provide a constant electric shock sensation.

[0015] On the other hand, it is noted that even if an effect is not explicitly mentioned here, the effects and provisional effects described in the following specification that are expected by the technical features of the present invention are treated as if they were described in the specification of the present invention. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to a preferred embodiment of the present invention. [Figure 2] FIG. 10 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to another preferred embodiment of the present invention. [Figure 3] FIG. 10 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to yet another preferred embodiment of the present invention. [Figure 4] FIG. 10 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to yet another preferred embodiment of the present invention. [Figure 5] FIG. 10 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to yet another preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, the configuration of the present invention and the effects resulting from the configuration will be described in detail with reference to the drawings, which illustrate various embodiments of the present invention. In describing the present invention, detailed descriptions of related well-known functions will be omitted if they are obvious to those skilled in the art and are deemed to unnecessarily obscure the gist of the present invention.

[0018] Terms such as "first" and "second" may be used to describe various components, but the components should not be limited by these terms. These terms may be used only to distinguish one component from another. For example, a "first component" may be referred to as a "second component," and similarly, a "second component" may be referred to as a "first component" without departing from the scope of the present invention. Furthermore, singular expressions include plural expressions unless clearly expressed differently in the context. Terms used in the embodiments of the present invention may be interpreted in the manner commonly known to those skilled in the art, unless otherwise defined.

[0019] Hereinafter, the configurations of the present invention and the effects resulting from the configurations thereof will be described in detail with reference to the drawings, which illustrate various embodiments of the present invention.

[0020] FIG. 1 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to a preferred embodiment of the present invention.

[0021] The electric shock prevention circuit 100 of the present invention comprises a power input section 110, a transformer section 120, output resistors 130 and 132, a switch section 140, and an output section 150.

[0022] AC power is input to the power input unit 110 and transferred to an input tap of the transformer unit 120 .

[0023] The transformer 120 converts the AC input voltage into the voltage required for the electric potential treatment device. To this end, the transformer 120 is configured with a plurality of taps each having a different output voltage.

[0024] A plurality of output taps of the transformer unit 120 are selected by the switch unit 140 and transmitted to the output unit 150, so that the user receives electric potential therapy.

[0025] At this time, if the output voltage is transmitted to the user as it is, the user will feel a large electric shock, so output resistors 130 and 132 are required to limit the output.

[0026] However, since the electric shock sensation inevitably changes depending on the magnitude of the output voltage of the transformer 120, it is necessary to minimize the electric shock sensation caused by voltage changes. Therefore, the output resistors 130 and 132 can be set to be proportional to the voltage of the output tap of the transformer 120.

[0027] The higher the voltage of the output tap of the transformer unit 120, the larger the resistance value of the output resistors 130, 132 should be set, so that the current transmitted to the user will be approximately the same, and the change in the sensation of electric shock due to voltage changes will be less noticeable.

[0028] Alternatively, the ratio of the output voltages of the transformer 120 and the ratio of the output resistors 130, 132 can be set to be the same. If the ratio of the output voltages and the ratio of the resistors are the same, the output currents at all output taps will be the same because the current is the value obtained by dividing the voltage by the resistance. Therefore, the electric shock sensation caused by the output voltage will be the same, which can alleviate the user's anxiety.

[0029] FIG. 2 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to another preferred embodiment of the present invention.

[0030] The electric shock prevention circuit 200 according to another embodiment of the present invention may further include a voltage measuring unit 260, an input switch unit 270, and a control unit 280 in addition to the power input unit 210, the transformer unit 220, the output resistors 230 and 232, the switch unit 240, and the output unit 250.

[0031] Even if the resistance values ​​of the output resistors 230 and 232 are set to keep the output current of the output tap of the transformer unit 220 constant, the electric shock sensation felt by the user may vary if the voltage of the power input unit 210 is unstable. This is because the transformer unit 220 converts the voltage at the output tap based on the voltage of the input tap, and therefore may be unstable depending on the input voltage.

[0032] Therefore, after measuring the voltage of the power supply input unit 210 by the voltage measuring unit 260, the control unit 280 adjusts the switching duty of the input switch unit 270 according to the measured voltage, thereby maintaining the input voltage constant.

[0033] To this end, the voltage measuring unit 260 converts the input voltage using a low-voltage transformer, rectifies the converted voltage using a full-bridge rectifier, and then divides the voltage using resistors.

[0034] The control unit 280 measures the input voltage divided by the voltage measurement unit 260 to measure the stability of the input voltage, and then controls the switching duty of the input switch unit 270 accordingly, thereby maintaining a constant output voltage of the transformer unit 220. To this end, the control unit 280 includes one or more processors and memories and controls the switching duty of the switch unit 270.

[0035] FIG. 3 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to yet another preferred embodiment of the present invention.

[0036] An electric shock prevention circuit 300 according to another embodiment of the present invention may further include a voltage measuring unit 360, an input switch unit 370, and a control unit 380 in addition to a power input unit 310, a transformer unit 320, output resistors 330 and 332, a switch unit 340, and an output unit 350.

[0037] Unlike the example of FIG. 2, in the example of FIG. 3, the voltage measurement unit 360 can be placed at the output tap of the transformer unit 320.

[0038] The voltage measuring unit 360 is composed of a resistor and a phototransistor and can measure the output voltage.

[0039] The control unit 380 is composed of one or more processors and a control unit, and can control the switching duty of the input switch unit 370 according to the voltage of the voltage measuring unit 360. Therefore, the transformer unit 320 can output a constant output voltage by controlling the switching duty of the input switch unit 370, and the output current is adjusted to a constant value by the output resistors 330 and 332, so that the user does not feel any change in the sensation of electric shock due to the change in voltage.

[0040] FIG. 4 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to yet another preferred embodiment of the present invention.

[0041] An electric shock prevention circuit 400 according to another embodiment of the present invention may further include an AC-DC converter unit 460 and an inverter unit 470 in addition to a power input unit 410, a transformer unit 420, output resistors 430 and 432, a switch unit 440, and an output unit 450.

[0042] The output voltage of the transformer 420 depends on the input voltage of the power input unit 410. Therefore, if the input voltage of the power input unit 410 is stabilized, the output voltage of the output tap of the transformer 420 can also be stabilized.

[0043] For this purpose, the AC-DC converter unit 460 and the inverter unit 470 can be used to stabilize the voltage.

[0044] The power converted to DC by the AC-DC converter unit 460 is converted back to AC by the inverter unit 470. At this time, the inverter unit 470 generates AC at a predetermined constant output voltage, thereby stabilizing the input voltage of the transformer unit 420.

[0045] Since the output voltage of the transformer 420 is converted into the same current by the output resistors 430 and 432, the user cannot sense the change in the electric shock caused by the output voltage, and therefore, the user can avoid the anxiety caused by the change in the electric shock.

[0046] FIG. 5 is a circuit diagram of an electric shock prevention circuit of an electric potential therapy device according to yet another preferred embodiment of the present invention.

[0047] The electric shock prevention circuit 500 according to another embodiment of the present invention may further include a voltage measuring unit 560 and a control unit 570 in addition to the power input unit 510, the transformer unit 520, the output resistors 530 and 532, the switch unit 540, and the output unit 550.

[0048] The voltage measuring unit 560 can measure the voltage of the power input unit 510 or the output tap of the transformer unit 520 .

[0049] The control unit 570 may include one or more processors and memories. The control unit 570 adjusts the output current of the transformer unit 520 based on the measured voltage. The output current can be adjusted by adjusting the resistance values ​​of the output resistors 530 and 532.

[0050] Therefore, the output resistors 530 and 532 may be variable resistors. By adjusting the resistance value of the variable resistors, the output current of the transformer 520 can be adjusted to a constant value, so that the user does not feel uneasy due to changes in the sensation of electric shock.

[0051] According to the electric shock prevention circuit of the present invention as described above, the electric shock sensation caused by changes in the output voltage of the electric potential therapy device is maintained constant, thereby preventing the user from feeling uneasy due to a sudden change in the electric shock sensation.

[0052] The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above, and it should be reiterated that the scope of protection of the present invention should not be limited by obvious modifications or substitutions in the technical field to which the present invention belongs.

Claims

1. a power supply input section to which AC power is input; a transformer unit having an input tap connected to the power input unit and two or more output taps; two or more output resistors, one end of which is connected to the two or more output taps, and each having a resistance value proportional to the voltage of the output tap; a switch unit connected to the other end of the two or more output resistors to selectively output voltages of the two or more output taps; and An electric shock prevention circuit for an electric potential therapy device, comprising: an output section connected to the switch section.

2. 2. The electric shock prevention circuit for an electric potential therapy device according to claim 1, wherein the resistance values ​​of the two or more output resistors are adjusted so that the output currents of the two or more output taps are the same.

3. a voltage measuring unit for measuring a voltage of the power supply input unit; an input switch unit for adjusting a voltage input to an input tap of the transformer unit according to a switching duty; and 2. The electric shock prevention circuit of claim 1, further comprising: a control unit that adjusts the switching duty of the input switch unit according to the voltage measured by the voltage measurement unit to adjust the voltage input to the input tap of the transformer unit to a constant value.

4. a voltage measuring unit for measuring a voltage at an output tap of the transformer unit; an input switch unit for adjusting the voltage input to the input tap of the transformer unit according to a switching duty; and 2. The electric shock prevention circuit of claim 1, further comprising: a control unit that adjusts the switching duty of the input switch unit according to the voltage measured by the voltage measurement unit to adjust the voltage input to the input tap of the transformer unit to a constant value.

5. an AC-DC transformer that converts the AC voltage of the power supply input into a DC voltage; and 2. The electric shock prevention circuit for an electric potential therapy device according to claim 1, further comprising: an inverter unit that converts the DC voltage output of the AC-DC transformer unit into an AC voltage and transmits it to an input tap of the transformer unit.

6. the output resistor is a variable resistor; a power supply measuring unit for measuring the voltage of the power supply input unit or the voltage of the output tap of the transformer unit; and 2. The electric shock prevention circuit for an electric potential therapy device according to claim 1, further comprising: a control unit for adjusting the resistance value of the output resistor according to the voltage measured by the power supply measurement unit.

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