JPH055512B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a low frequency treatment device.

2. Description of the Related Art Conventionally, low-frequency treatment devices have been known that perform treatment by applying electrodes to appropriate locations on the human body and flowing low-frequency current through the electrodes to the human body. In this conventional treatment device, the voltage waveform of the current flowing inside the human body was a square wave, a pulse wave, a sawtooth wave, a trapezoidal wave, or the like.
Therefore, the therapeutic effect could not be said to be sufficient.

The present invention is a treatment device that performs treatment by applying electrodes to appropriate parts of the human body, such as the site to be treated, and in order to increase the treatment effect, the waveform is the same or similar to the normal undistorted action potential waveform of a healthy human nerve. The present invention provides a low frequency treatment device equipped with a circuit that generates a voltage waveform.

It is already known that each organ of the human body is operated by currents with specific voltage waveforms, and among these, the waveform of nerve action potentials is as shown in FIG. It is believed that the current having the voltage waveform shown in FIG. 1 is transmitted through the nervous system with the least resistance. On the other hand, when a current with a voltage waveform such as a square wave is used as in a conventional low frequency treatment device, there is a certain resistance to the transmission of the current to the nervous system.

The present invention has been made based on the above reasons, and the details of the low frequency treatment device of the present invention will be explained below.

The treatment device of the present invention applies current to the human body by connecting a cord from the output end of the device of the present invention to an electrode applied to a predetermined location on the human body or an electrode of a puncture needle inserted, and the voltage waveform of the current to be applied is In order to make the waveform the same as or similar to the waveform of a normal, undistorted action potential of a healthy human nerve, a circuit for generating the voltage waveform as described above is provided. When such a low frequency treatment device of the present invention is used for treatment, the waveform of the current flowing for treatment is the waveform shown in FIG. 1 or a waveform similar thereto. A much higher therapeutic effect can be obtained than in the previous treatment.

Next, the circuit used in the treatment device of the present invention is as shown in FIG. Before explaining the details of this circuit, the oscillation circuit that is the basis thereof will be explained. Figure 3 shows a free-running blocking oscillator circuit. In this figure, when a voltage is applied to -V _EE , the resistance R ₁
A base current i _B is supplied to transistor 1 through it. As a result, collector current i _C begins to flow to the collector side of transistor 1. This current i _C increases from zero to the saturation current. During this time, an electromotive force V _WG shown by an arrow is generated between W and G of the primary winding of the transformer 2. This voltage V _WG is applied to the base of transistor 1 through capacitor C ₁ and increases the base current i _B. Due to this positive feedback, the collector current i _C increases rapidly, reaches the saturation current I _C in a time on the order of μs, and thus becomes a constant value. At that time, the voltage of the capacitor C ₁ has the polarity shown by the arrow in Figure 3, and becomes V _C ≒ V _WG > V _EE . As the collector current i _C increases in this way and reaches the saturation current I _C , the current becomes constant and V _WG =0. Then the voltage of capacitor C ₁
Transistor 1 is turned off because V _C puts the base of transistor 1 at a positive potential. As a result, the energy stored in the primary side of the transformer 2 generates a voltage pulse of opposite polarity to V _WG . Now capacitor C ₁ starts discharging through resistor R ₁ . As a result, when V _C <V _EE , the base current of transistor 1 begins to flow, and the collector current i _C begins to flow, returning to the initial operation. Thereafter, the above-described operations are repeated, so that pulses as shown in FIG. 4 are oscillated.

The circuit used in the treatment apparatus of the present invention is designed based on the circuit shown in FIG. 3 as described above, and is as shown in FIG. 2. As can be seen by comparing the circuit in Figure 2 with the circuit in Figure 3, a second capacitor C ₂ is connected to the primary winding of the transformer 2, and a third capacitor C ₃ is connected to the secondary winding of the transformer 2. It is connected. In other words, by these, the width of the pulse shown in FIG. 4 is expanded in the time direction. Furthermore, a resistor _R2 is connected to the primary winding of the transformer 2 via a diode D. By applying a load to only one polarity using the diode D and resistor _R2 , the amplitude of one polarity of the pulse is compressed. In this way, the pulse waveform shown in Fig. 4 (the waveform indicated by A in Fig. 5) is changed to the pulse waveform A' shown in Fig. 5, and the oscillation is made as shown in Fig. 1. A waveform that is almost the same as that of a nerve action potential can be obtained.

For low-frequency treatment devices, the energization interval (pulse interval) may vary depending on the area to be treated and the patient's condition.
It is common practice to use different types of drugs, and this provides a sufficient therapeutic effect. For this purpose, the output terminal of a periodic control circuit (not shown) is connected to the terminal indicated by reference numeral 4, and the signal current from the periodic control circuit is passed as the base current of the transistor 3, thereby making the transistor 3 conductive, and its emitter. A current is passed through the base of the connected transistor 1 to operate the circuit shown in FIG. 2 as described above, and to oscillate a pulse having the voltage waveform shown in FIG. 5. Since the circuit of FIG. 2 does not oscillate unless the signal current from the period control circuit flows, the pulse interval oscillated by the period control circuit is controlled to a desired time interval. Further, in FIG. 2, reference numerals 5 and 6 are output terminals connected to electrodes applied to or inserted into the human body, and a polarity converter is provided here as shown. In the case of treatment, it is preferable to change the polarity depending on the treatment content. In other words, when a current with the waveform shown in FIG. 1 flows into the human body, a sedative effect occurs, and conversely, when a current with the same waveform flows out of the human body, an stimulant effect occurs. Therefore, it is necessary to change the polarity of treatment when a sedative effect is required and when a stimulant effect is required, and by doing so, appropriate treatment can be performed. Furthermore, the therapeutic effect may be increased by switching the polarity at regular intervals. Therefore, a polarity converter is provided at each output end.

In addition, the variable resistors VR ₁ , VR ₂ , VR ₃ ,
The energizing current is adjusted by VR ₄ , and its magnitude is
It is measured by the voltage at terminals 7 and 8. Also, since transistor 1 allows a large current to flow, an electrolytic capacitor _C4 is connected to the power source to reduce the impedance of the power source.

As explained above, since the treatment device of the present invention uses a current with a voltage waveform that is the same as or similar to a human nerve action potential, it can further increase the treatment effect compared to conventional low-frequency treatment devices of this type. It's something you get. Furthermore, by using a treatment device having an electric circuit as shown in Fig. 2, a current having a voltage waveform that is the same as or similar to the normal activation voltage waveform without distortion of a healthy human nerve as shown in Fig. 1 can be used. All treatments are possible.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the waveform of an action potential of a human nerve, Fig. 2 is a circuit diagram showing an example of the electric circuit of the treatment device of the present invention, and Fig. 3 is an oscillation circuit that is the basis of the circuit in Fig. 2. FIG. 4 is a diagram showing pulses generated by the circuit shown in FIG. 3, and FIG. 5 is a diagram showing pulses generated by the circuit shown in FIG. 2. In the figure, 1...transistor, 2...transformer, _C1 , _C2 , _C3 ...capacitor, D...
Diode, R ₁ , R ₂ ...Resistance.

Claims (1)

[Scope of Claims] 1. A treatment device having a circuit connected to the electrode in order to perform treatment by inserting or applying an electrode to an appropriate part of the human body and flowing a current into the human body through the electrode, the circuit being connected to the human body. A low-frequency treatment device characterized by being a circuit that generates a voltage waveform that is the same as or similar to the waveform of a nerve action potential. 2. In a treatment device that has a circuit connected to the electrode in order to perform treatment by inserting or applying an electrode to an appropriate location on the human body and flowing a current into the human body through the electrode, the circuit connects one end of the primary winding to a transistor. a transformer whose other end is connected to the collector side of the transistor via a first capacitor to the base side of the transistor; a second capacitor connected to both ends of the primary winding of the transformer; A load resistor is connected to both ends of the transformer via a diode, and a third capacitor is connected to both ends of the secondary winding of the transformer. A low-frequency treatment device with a voltage waveform similar to that of