JPH046769Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention insulates one end of the secondary winding of a transformer within the transformer, and connects the other end to a conductor for contacting the human body. Regarding transformers for medical treatment equipment.

[Conventional technology]

In the transformer of this type of treatment device, one end of the secondary winding is insulated even though the voltage on the secondary side is extremely high, so if the other end is grounded through a human body, etc. Since the end portion changes from an electrically floating state to a reference potential, a high voltage is generated directly between the vicinity of the insulation treatment portion of the secondary winding, the iron core, and the primary winding.

As a result, dielectric breakdown occurs and corona discharge occurs, causing insulation failure and power loss due to aging. Conventional countermeasures have been to use transformers with high insulation performance, such as by using cores with large core windows or by applying advanced insulation treatment.

[Problems to be solved by the invention] However, if a core with a large core window is used, the treatment device itself must become larger and heavier, making it expensive and inconvenient to handle. Furthermore, applying advanced insulation treatment not only complicates the manufacturing process but also increases costs.

The purpose of this invention is to create a transformer for treatment equipment that has high insulation performance by simply adding a simple modification to the secondary winding of the transformer, eliminating the need to use a core with a large core window or applying advanced insulation treatment. Our goal is to provide the following.

[Means for solving problems]

The characteristic configuration of the treatment device according to the present invention is that the two transformers
While configuring the next winding as a plurality of winding groups,
The outer diameter of the insulated winding group is made smaller than the outer diameter of the other winding groups, and its functions and effects are as follows.

[Effect]

In other words, by reducing the outer diameter of the insulated winding group, the distance between the winding group and the core and primary winding located on its outer periphery, that is,
As the gap increases, the electric field strength decreases and the spark voltage increases, making it possible to significantly improve insulation performance.

[Effect of idea]

The above structure and action improve the insulation performance of the transformer, so there is no need to use a transformer with a large core with a large core window or to perform special insulation treatment, and the treatment device itself is also compact. It has become lightweight, inexpensive, and convenient to handle.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

To connect the single-phase AC power supply 100V to the primary winding N1 of the primary circuit of the transformer Tr through the voltage regulator SD, connect the switch SW, the energizing pilot lamp PL1, and the safety circuit A as shown in Figure 4. voltage regulator
A voltmeter V and an output pilot lamp PL2 are provided on the input side of the SD, and on the output side.

In the secondary circuit of the transformer Tr, one end of the secondary winding N ₂ is insulated inside the transformer Tr, and the other end is connected to the connection cord 1 via a high resistance R. A conductor port 2 is attached to the.

As shown in Fig. 6, these parts are housed in a wooden case 3, and a switch SW and a voltage regulator are installed on the front panel 3a of the case 3.
Knob 4 for SD, the above two pilot lamps
PL1, PL2, the meter M of the voltmeter V, and the conductor port 2 are exposed.

Next, the function of each part will be explained. switch
The SW is located on the input side of the voltage regulator SD to turn on single-phase AC 100V for general household use, and when turned on, the energizing pilot lamp PL1 lights up. The voltage regulator SD uses a slider, and by rotating the adjustment knob 4, the output voltage can be varied from 0V to 135V, and the voltage value is measured by the voltmeter V and displayed on the meter M. Ru. The output pilot lamp PL2 lights up when the voltage value becomes 50V or more.

A safety circuit A is provided on the input side of the voltage regulator SD.
This is to cut off the circuit on the primary side of the transformer Tr if a current of 1 mA or more that is dangerous to the human body attempts to flow to the next side.

As shown in FIGS. 1 and 2, the transformer Tr is an external iron type circular winding transformer using a laminated iron core 5, and a cylindrical insulating film 6a is fitted around the center of the iron core 5. A primary winding is formed on the outer peripheral surface of this insulating film 6a.
Secondary winding N 2 consisting _of N ₁ and two winding groups N _2a and N _2b
It is formed by being wrapped around it. The primary winding N ₁ is wound 230 times using a polyester conductor wire with a diameter of 0.6 mm, and the secondary winding N ₂ is wound 30000 times using an enamelled wire with a diameter of 0.09 mm, of which the secondary winding N ₂ is the first winding group N _2a is 18000 times, the second winding group N _2b is
It is wound 12,000 times, or with a turns ratio of 6:4. Both winding groups N _2a and N _2b , as shown in Fig. 5,
Each has one lead wire a1, a2, b1, b2 on the inner circumferential part and the outer circumferential part, and both winding groups
The connection between N _2a and N _2b is the leader line a2 on the inner periphery,
It is conducted by b1 comrades.

Out of the second winding _N2 , the lead wire a1 on the outer periphery of the first winding group _N2a is connected to the connection cord 1 via a high resistance R to significantly limit the current. Since high voltage is applied to the lead wire b2 on the outer periphery of N _2b , the outer periphery of the second winding group N _2b inside the transformer Tr is taped and insulated.

By making a difference in the number of turns of both winding groups N _{2a and} N _2b of the second winding N ₂ , the outer diameter D ₂ of the second winding group N _2b is smaller than that of the first winding group N _2a . The diameter D is smaller than ₁ , so as shown in _FIG .
The gap _G2 between the first winding group N2a and the iron core 5 is 1.5 to 2 times larger than the gap _G1 between the first winding group _N2a and the iron core 5.
Note that an insulating film 6b is used to insulate the transformer Tr.

Next, we will explain how to use this electric potential treatment device and the situation when an accident occurs.

First, when the user places himself on the insulating mat 7 and turns on the switch SW, the single-phase AC 100V for general household use is input to the voltage regulator SD, and the energizing pilot lamp PL1 is lit. Ru.
Next, gradually turn adjustment knob 4 to adjust the voltage regulator SD.
As the output voltage is increased, when the voltmeter V reaches 50V, the output pilot lamp PL2 lights up and enters the applicable range of use. Furthermore, when the rated primary voltage of the transformer Tr is increased to 100V, the transformer
A high voltage of just under 12000V is generated on the secondary side of the Tr. Therefore, by insulating one end of the high voltage side inside the transformer Tr and floating it, the voltage between the outer lead wire of the first winding group _N2a and the ground becomes approximately 3000V. This 2
The high voltage on the next side is transmitted to the conductor 10 attached to the tip of the conductor cord 8 by inserting the jack 9 of the conductor cord 8 into the conductor port 2. At this time, the current flowing through the secondary side is extremely small. When this conductor 10 is brought into close contact with the user's skin placed on the insulating mat 7, there will be a potential difference between the user's body and the conductor 10. There is no potential and the potential difference constantly fluctuates, but when it becomes high and the electric field strength exceeds a critical level, calcium in the human body is ionized. Incidentally, the results are said to be effective for headaches, stiff shoulders, insomnia, and constipation.

Next, a case will be described in which an abnormal situation occurs while using the electric potential therapy device.

For example, if a user inadvertently protrudes from the insulating mat 7 while sleeping, the conductor 10 is grounded through the human body and its potential becomes zero. In this case, since a high resistance R is inserted between the conductor 10 and the transformer Tr, there is no effect on the human body, but since the conductor 10 is fixed as a reference potential, that is, the lead wire of the transformer Tr a
1 becomes the reference potential, a high voltage of about 12,000 V is also generated between the iron core 5 of the voltage generator Tr, which is also at the reference potential, and the insulated lead wire b2. Furthermore, a voltage as high as √2 is generated instantaneously. At that time, there is a possibility that dielectric breakdown may occur between the transformer and the gap _G2 , resulting in discharge, but the transformer Tr of the present invention has a large gap _G2 and significantly improved insulation performance, so it can withstand sufficient resistance. I can do it.

In addition, although the electric potential treatment device of this example has the insulation performance of the transformer Tr significantly improved as described above,
If high voltage continues to be applied to the gap _G2 between the secondary winding _N2 and the iron core 5 for a long period of time, the insulating film 6b corresponding to that part will deteriorate, causing electrical discharge due to insulation failure. There is a risk that the short-circuit current will flow to the iron core 5 side. Although this is suppressed by using a high resistance R, this does not cut off the circuit, so if this state is left as it is, the current will continue to flow through the circuit forever, and instead it will cause secondary damage due to heat generation, etc. This can lead to disasters. This electric potential treatment device has a secondary winding _N2 to prevent this.
A safety circuit A is further provided to interrupt the circuit on the primary side when an abnormal current of 1 mA flows through the circuit.

[Brief explanation of the drawing]

The drawings show an embodiment of the transformer of the treatment device according to the present invention, and FIG. 1 is a side view of the transformer, FIG. 2 is a plan view of the transformer, FIG. 3 is an enlarged view of the gap part, and FIG.
The figure is an overall circuit diagram of the treatment device, FIG. 5 is a circuit diagram of a transformer, and FIG. 6 is an overall perspective view of the treatment device. 10...Conductor, Tr...Transformer, _N2 ...Secondary winding, _N2a , _N2b ...Winding group of secondary winding, _D1 , _D2 ...
...Outer diameter of the winding group.

Claims (1)

[Scope of utility model registration request] In the transformer of the treatment device, one end of the secondary winding _N2 of the transformer Tr is insulated within the transformer Tr, and the other end can be connected to a conductor 10 for contacting the human body. A treatment device in which the secondary winding N ₂ is configured as a plurality of winding groups, and the outer diameter D ₂ of the insulated winding group N _2b is smaller than the outer diameter D ₁ of the other winding group N _2a . transformer.