JP2914115B2 - Potential therapy device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a potential treatment apparatus for applying a voltage to a subject to perform treatment.

[0002]

2. Description of the Related Art In general, a potential therapy apparatus applies an AC voltage to the entire human body or applies an AC voltage to a local part of the human body to treat stiffness and constipation.

As shown in FIG. 2, this electric potential therapy apparatus comprises a main body 21, an electric floor 29, local conductors 30 and 31, and the main body 21 comprises an operation section 22, a display section 23, a control section 24, a transformer 25 and 26 and protection resistors 27 and 28.

[0004] The electric floor 29 is a mat-shaped one, and an AC voltage (about 3000 V to about 9000 V) from the transformer 25 is applied to the human body through the electric floor 29 when a person sits on or sleeps on the mat. Give to.

Further, by selectively using the pen-shaped local conductor 30 and the roller-shaped local conductor 31 in accordance with the shape of the part where the human body is desired to be treated, the AC voltage from the transformer 26 is applied to the local part of the human body. (Approximately 200 V to approximately 800 V) is applied to the human body via the local conductors 30 and 31.

In order to change the voltage applied to the human body,
By setting the applied voltage from the operation unit 22, the control unit 2
In 4, the primary taps of the transformers 25 and 26 are switched.
The output on the secondary side can be made variable.

The display unit 23 displays the magnitude of the voltage applied to the human body, the remaining time of the output time of the applied voltage, and the like.

In the electric potential treatment, a relatively high voltage is applied to the human body.
If a voltage higher than the specified value is generated due to a failure such as 6 or a voltage fluctuation of the power supply line of the AC 100 V line, a danger to the human body is given.

For this reason, even if a high voltage exceeding a specified value is generated, there is no danger to the human body between the transformer 25 and the electric floor 29 and between the transformer 26 and the local conductors 30 and 31. The current limiting protection resistors 27 and 28 are inserted to prevent an overcurrent from flowing to the human body.

[0010]

However, an increase in current can be prevented to some extent only by providing a protection resistor for limiting the current. However, when a very high voltage or the like is applied, the current is not limited. However, there is a problem that the overcurrent cannot be prevented even if the resistor exists.

The present invention has been made in order to solve the above-mentioned problems, and detects an overvoltage generated from a device immediately after an overvoltage is generated, thereby preventing a human body from overcurrent. It is intended to provide a treatment device.

[0012]

In order to achieve the above object, a voltage generating circuit and an electrode for applying a voltage from the voltage generating circuit to a subject are provided, and a voltage is applied to all or a local portion of the subject. In a potential therapy apparatus for applying and treating, a resistance provided between a voltage input side of the voltage generation circuit and a ground line, and a voltage generated by a leakage current from a human body detected by the resistance and a predetermined voltage are applied. And a shutoff circuit for shutting off the voltage applied to the subject when the voltage detected by the resistor exceeds a predetermined voltage value.

[0013]

When an overvoltage is applied to the object due to a failure of the voltage generating circuit, a large leakage current is generated from the electrode for applying the voltage to the object to the ground via the object. This leakage current is detected as a voltage value by a resistor provided between the voltage input side of the voltage generating circuit and the ground line through the AC line, and this voltage value is compared with a predetermined voltage by a comparison circuit, and When the voltage exceeds the voltage, the voltage applied to the subject is cut off by the cutoff circuit.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows the main components of a potential therapy apparatus according to the present invention. An operation unit 1 for selecting an output time of a potential and a local potential, and for selecting a magnitude of a potential;
Reference numeral 2 denotes a display unit for displaying time, potential intensity, etc., 3 denotes a control unit for controlling the entire apparatus, 4 denotes a transformer as a voltage generation circuit, and 5 denotes a power supply for supplying DC power to the control unit 3 and the like. ,
6 and 12 are relays, 7 is an electric floor, 8 is a filter for removing surges and noises, 9 is a comparator, 10 is a self-holding circuit, 11 is a 100 V AC power supply, 13 is an AC line connection, R1, R2, R3 is a resistor.

Next, the operation will be described. First, the AC line connection unit 13 is connected to an outlet or the like connected to the AC 100 V power supply 11 in order to operate the potential therapy device.

Then, when AC100V is supplied to the entire apparatus by an ON / OFF switch of the apparatus, the apparatus becomes operable. Next, the output time is set by the timer button 1a of the operation unit 1, and the magnitude of the potential is set by the output setting button 1b. This setting button switches the pattern each time it is pressed. For example, the timer button 1
The output time of 20 minutes, 30 minutes, 40 minutes, 50 minutes, and 1 hour can be sequentially changed by a.

By repeatedly pressing the output setting button 1b, the output voltages of 3000V, 6000V and 9000V can be sequentially switched.

When such a setting is completed and the start / stop button 1c is pressed, the control unit 3 performs control in accordance with the set parameters, and when this button is pressed again, the output voltage is forcibly turned off.

The switching tap of the relay 6 has the transformer 4 at the top.
Output voltage 3000V, middle to 6000V, lower 9V
000V.

For example, assuming that the potential output of 6000 V is selected by the output setting button 1 b, the control unit 3 switches the tap of the relay 6 (the second tap from the top is connected to the AC 100 V line). 4 is set to 6000V. The voltage thus created is supplied to the electric floor 7.

A human being to be treated exists on the electric floor 7 in a sitting state or a sleeping state.
Is applied. Then, the remaining time of the set application time of the high voltage and the like are displayed on the display unit 2.

It is sufficient that the voltage set in the normal device is maintained within a range that does not affect the human body. However, an overvoltage occurs due to a failure of the transformer 4 or a voltage fluctuation of the AC 100 V line, and the human body has an excessive voltage. Since a dangerous state occurs when a current flows, a current limiting resistor R3 is provided to prevent an overcurrent from flowing. However, when overcurrent cannot be prevented by the current limiting resistor R3, danger to the human body is prevented as follows.

The leakage current from the human body is grounded, AC100
It returns to the ground line side of the AC line connection unit 13 via the V power supply 11. Since the relay 12 is normally closed,
This leakage current flows through the resistors 4 and 2 of the transformer 4 through the resistors R1 and R2.
It passes through the next side and flows into the electric floor 7 from the current limiting resistor R3.

A voltage is generated across the resistor R2 by the leakage current. The voltage generated at both ends of the resistor R2 is input to the comparator 9 through the filter 8. A reference voltage Vr set in advance from the control unit 3 is input to the comparator 9. If the comparison voltage Vs input to the comparator 9 is higher than the reference voltage Vr, the relay 9 is driven. Sends a relay drive signal to the self-holding circuit 10,
The self-holding circuit 10 latches the relay drive signal, turns off the relay 12, cuts off the connection between the AC 100V line and the transformer 4, and stops high voltage output to the human body.

At this time, the self-holding circuit 10 keeps outputting the relay drive signal to the relay 12 unless forcedly reset from the outside, and prevents the relay 12 from being turned on again, so that the safety is high. In the case of forcibly resetting, the control unit 3 outputs a reset signal to the self-holding circuit 12 by pressing a reset button 1d provided on the operation unit 1.

The filter 8 is provided with a comparator 9 which generates a surge voltage generated when the tap of the relay 6 is switched to change the output of the transformer 4 and a noise mixed in the AC line.
The filter 8 removes surge voltage and noise.

In the above embodiment, since the reference voltage Vr is a DC voltage and the comparison voltage Vs input to the comparator is an AC voltage, the peak value of the reference voltage Vr is compared with the peak value of the comparison voltage Vs to compare the comparison voltage Vs. Although the relay 12 is turned off when the peak value exceeds the reference voltage Vr, a full-wave rectifier circuit is provided between the comparator 9 and the filter 8 to convert the comparison voltage Vs to a DC voltage level. You may make it compare with the reference voltage Vr. Furthermore, instead of looking at only the steady voltage after removing surge voltage and noise, a filter 8 is used as a band-pass filter or the like so as to pass surge voltage or noise of a certain cycle width, so that an abnormal state can be quickly detected. May be.

In the above embodiment, the power supply is cut off by using the relay 12, but the relay 6 may be turned off to cut off the transformer output.

Further, in the above embodiment, an example in which the electric floor is connected to the potential therapy apparatus has been described. However, even when a local conductor is connected, the same circuit configuration as described above can be used. It can be operated as a safety circuit for preventing danger to the human body.

[0030]

As described above, according to the potential therapy apparatus of the present invention, the leakage current returning to the earth line of the apparatus is converted into a voltage and compared with a reference voltage. Since the applied voltage is cut off, if an overvoltage occurs due to a failure of the voltage generation circuit or a fluctuation in the voltage of the AC 100 V power supply line, the applied voltage to the human body can be cut off instantaneously, thereby improving safety. it can.

Although the voltage applied to the human body is a high voltage, the circuit for cutting off the high voltage output has a low detection voltage, so that there is no need to require special specifications such as withstand voltage for circuit elements. The circuit configuration can be simple and small.

[Brief description of the drawings]

FIG. 1 is a diagram showing a potential therapy apparatus according to one embodiment of the present invention.

FIG. 2 is a diagram showing a conventional potential therapy device.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61N 1/08 A61N 1/10

Claims (1)

(57) [Claims] 1. A potential therapy apparatus comprising: a voltage generation circuit; and an electrode for applying a voltage from the voltage generation circuit to a subject, and applying a voltage to all or a portion of the subject to perform treatment. A resistor provided between a voltage input side of the voltage generation circuit and a ground line, a comparison circuit for comparing a voltage generated by a leakage current from a human body detected by the resistance with a predetermined voltage value, A potential cutoff circuit for cutting off a voltage applied to the subject when a voltage detected by the resistance exceeds a predetermined voltage value.