JPH0242286Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention automatically switches the polarity of the negative potential treatment device to the commercial power supply even if it is inserted in the opposite direction, and allows the treatment electrode to The present invention relates to a device that outputs a regular therapeutic voltage.

[Conventional technology]

When performing treatment with a DC negative potential therapy device, there are two types: one that requires two electrodes, a treatment conductor and a grounding conductor, and one that returns one pole to the commercial power supply and performs treatment using only the treatment conductor. There is something to do. In the former case, depending on the structure of the building, it is difficult to reliably ground the ground, and it is also difficult to determine whether the grounding state is complete. In the latter case, due to the difference in the direction in which the plug is inserted into the commercial power outlet, the waveform of the commercial power supply is added to the output, and the normal therapeutic effect may not be obtained. For this reason, some systems reduce the effect by returning the voltage to the midpoint of the commercial power supply, but this still outputs a voltage of 50V AC, which is not desirable.

[Problem that the invention attempts to solve]

In order to obtain proper treatment effects, conventionally, a voltage detector such as a neon tube was used to determine the ground side of the commercial power supply, but the luminance of the neon tube itself was low and it was difficult to distinguish. AC of the treatment device
Another drawback was that it required polarity markings on the outlet plug, and it was also complicated to handle.

The present invention eliminates these conventional drawbacks and automatically switches the polarity of the power supply so that a treatment voltage with a regular waveform can be obtained simply by touching the check plate provided on the treatment device body. The purpose is to provide equipment.

[Means for solving problems]

In order to achieve this purpose, the automatic connection device for the ground side line of the commercial power supply in the negative potential therapy device of the present invention supplies power from the commercial power supply to the primary side of the transformer,
A negative potential treatment device comprising a negative potential generation circuit on the secondary side of the transformer, wherein the positive line of the negative potential generation circuit returns to one of the two lines on the primary side of the transformer. 2 of the transformer, in which a regular treatment voltage is output from the negative electrode of the negative potential generation circuit when the feedback line is connected to the ground side line of the commercial power source. A switching contact of a polarity switching relay is inserted between the feedback circuit from the negative potential generation circuit on the next side to the primary side of the transformer and the two lines on the power input side, and is separate from the transformer. A check plate for detecting power supply polarity is connected to an input terminal of an amplifier circuit driven by a power supply whose one power supply line is connected to the feedback line on the primary side of the transformer; The present invention is characterized in that the polarity switching relay is driven by the output so that the feedback circuit on the primary side of the transformer is automatically switched to the ground side line of the power supply.

〔Example〕

Hereinafter, the present invention will be explained based on two examples of implementation circuits shown in FIGS. 1 and 2.

First, a first embodiment shown in FIG. 1 will be described. 1 in the diagram is the plug that plugs into the AC outlet,
2 is the primary side circuit of the transformer T1, 3 is a treatment voltage generation circuit configured on the secondary side of the transformer T1, 4 is an output terminal that outputs the treatment voltage, and 5 is the positive line of the treatment voltage generation circuit 3. A feedback circuit for feeding back to one line (hereinafter referred to as a feedback circuit) 6 of the primary circuit 2 of the transformer T1, 7 a non-feedback circuit, and 8 an amplifier configured on the secondary side of the transformer T2. 9 is a check plate connected to the input terminal of the amplifier circuit 8, 10 is a polarity switching relay connected as an output load of the amplifier circuit 8, and 11 and 12 are the contacts of the relay and are connected to the transformer T1. A switching contact is inserted between the primary line and the plug 1 side, 13 is a connection line connecting the feedback point a of the feedback circuit 5 and the ground line of the amplifier circuit 8, and 14 is a connection line between the feedback line 6 and the non-contact line. a first high resistance circuit connected between the feedback circuit 7;
5 is a second high resistance circuit connected in parallel to the closing switch SW2.

Below, SW1 is the power switch, F is the fuse,
R1 to R28 are fixed or variable resistors, N1 to N3
is a neon lamp, C1 to C5 are capacitors, D1
~D8 represents a diode, and Q1 to Q6 represent transistors.

The operation of the circuit of this first embodiment will be explained below.

Now, when the plug 1 is inserted into the commercial power outlet with the correct polarity, that is, when the line l1 is the ground line of the commercial power supply, turn on the power switch SW2 and check the check plate 9.
When a human body such as a finger is touched, the switching contacts 11 and 12 of the polarity switching relay 10 switch to the line l1 as shown in the figure.
Since the line 12 is connected to the line 6 and the line 12 is connected to the line 7, the check plate 9 which is grounded by the human body and the feedback line 6 are at the same potential, and therefore the transistor Q1 which is the input of the amplifier circuit 8 The base current does not flow, so the relay 10 does not operate, and the switching contacts 11 and 12 continue to connect the line l1 and the line 6, and the line l2 and the line 7.

Next, when the plug 1 is inserted into the power outlet with reverse polarity, that is, when the line 12 is the ground line of the commercial power supply, the power switch is
When SW2 is turned on and a human body touches the check plate 9 with a finger or the like, the switching contacts 11 and 12 of the polarity switching relay 10 switch the line l1 to the line 6 as shown in the figure.
Since line l2 is connected to line 7,
During the half cycle in which the line l1 becomes a negative voltage with respect to the ground, the potential of the check plate 9 becomes a positive potential relative to the ground line of the amplifier circuit 8, and the base potential of the transistor Q1 becomes higher than the emitter potential. Transistor Q1 turns on. Therefore, transistor Q2 is also turned on, and Q2
The collector output is a rectangular wave with the same period as the power supply frequency. Once transistor Q2 is turned on, transistor Q4 is also turned on at that moment. Then, the resistor R2 connected to the collector of Q4
3. Due to the bias of R24, transistor Q3 is turned on, and its collector voltage rises, so that current continuously flows into the base of transistor Q4 through resistor 25, so even if transistor Q2 is subsequently turned off, transistor Q4 remains The polarity switching relay 10 is continuously turned on and is its load.
is operated to switch the switching contacts 11 and 12 to the other pole. Therefore, line l2 is line 6
Since the lines l1 are respectively connected to the lines 7, the return line 6 is automatically connected to the ground line of the power supply.

FIG. 2 shows a circuit of the second embodiment of the present invention, and most of the configuration is the same as the first embodiment, but the difference from the first embodiment is that the first embodiment has a polarity switching circuit. The contacts 11 and 12 of the relay 10 are configured to connect the lines l1 and l2 and the lines 6 and 7 to the correct polarity, whereas in the second embodiment, the primary return point of the return path 5 is connected to the line Relay 1 for polarity switching to return to the correct one of 6 or 7
0 contact 11' selects the feedback point. That is, when line 12 is the ground line of the commercial power source, when the check plate 9 is touched with a finger, the potential of the check plate 9 changes to the ground line of the amplifier circuit 8 during a half cycle in which the line 11 becomes negative potential with respect to the ground. The base potential of the transistor Q1 becomes higher than the emitter potential, and the transistor Q1 is turned on. Similarly to the first embodiment, the transistor Q4 is continuously turned on, and its load, which is the polarity The switching relay 10 is operated to switch the switching contact 11' to the line 7. Therefore, the feedback point of the feedback circuit 5 becomes the ground line 7, that is, the line 12.

In this way, by touching the check plate 9 with your finger or the like, you can always connect the positive line of the therapeutic voltage generation circuit 3, which is the secondary circuit of the transformer T1, to the ground side line of the commercial power supply, and turn it on. By turning on the switch SW2, a normal treatment voltage can be applied to the output terminal 4.

[Effect of idea]

As mentioned above, according to the present invention, it is possible to automatically switch the polarity of the power supply so that a treatment voltage with a regular waveform can be obtained by simply touching the check plate provided on the treatment device body with a finger, etc. Even a therapist without any electrical knowledge can obtain the correct therapeutic effect.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a first embodiment of the present invention, and FIG. 2 is a circuit diagram showing a second embodiment of the present invention. 1... Plug, 2... Primary side circuit of transformer T1, 3... Treatment voltage generation circuit, 4... Output terminal, 5... Feedback circuit, 6... Feedback line, 7... Non-feedback circuit. , 8...Amplification circuit, 9...Check plate, 10...Polarity switching relay, 11, 12...
...Switching contact, 13... Connection line, 14... First high resistance circuit, 15... Second high resistance circuit.

Claims (1)

[Scope of utility model registration request] This is a negative potential treatment device in which power is supplied from a commercial power supply to the primary side of a transformer, and a negative potential generation circuit is configured on the secondary side of the transformer, and the positive electrode line of the negative potential generation circuit is connected to the transformer. It is fed back to one of the two lines on the primary side, and when the fed back line is connected to the ground side line of the commercial power supply, the normal treatment voltage is output from the negative electrode of the negative potential generation circuit. In the negative potential therapy device configured as follows, two of the transformers
A switching contact of a polarity switching relay is inserted between the feedback circuit from the negative potential generation circuit on the next side to the primary side of the transformer and the two lines on the power input side, and is separate from the transformer. A check plate for detecting power supply polarity is connected to an input terminal of an amplifier circuit driven by a power supply whose one power supply line is connected to the feedback line on the primary side of the transformer; A grounding side of a commercial power source in a negative potential treatment device, characterized in that the polarity switching relay is driven by the output so that the feedback line on the primary side of the transformer is automatically switched to the grounding side line of the power supply. Automatic track connection device.