JPH0438963A - Electric thrapeutic instrument - Google Patents

Abstract

PURPOSE: To provide sufficient electric stimulus to a muscular tissue and increase softening and activating effects on the muscular tissue so as to increase a treating effect by supplying a treatment signal obtained by amplitude- modulating a medium frequency of 7kHz to 15kHz changeable in a hinge treating effect frequency hand with a low frequency to a body. CONSTITUTION: By adjusting the level of a triangular wave outputted from a VCO11 with a variable resistor 12, a medium frequency oscillator 20 produces a medium frequency signal modulated between 7kHz to 15kHz around 11kHz. A medium frequency outputted from the medium frequency oscillator 20 is level-adjusted by a variable resistor 21, its unnecessary components are eliminated by a low pass filter 22 and then supplied to an amplitude modulator 23. The output signal of a low frequency oscillator 25 set to a certain frequency by a frequency selection switch 24 is level-adjusted by a variable resistor 25, a low frequency signal after unnecessary components are eliminated by the low pass filter 27 is inputted to the amplitude modulator 23 and amplitude- modulated. The output signal of the amplitude modulator 23 as a treating signal is supplied to a first treatment electrode 33.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an electric therapy device, and in particular to an electric therapy device that applies electrical stimulation to muscle tissue based on medium frequency signals and is used for activation treatment of muscle tissue. Regarding treatment equipment.

"Prior Art" Conventionally, as this type of electric therapy device, devices employing various methods have been proposed. Such electric therapy devices are configured to apply low frequency current to muscles to activate muscle tissues and the like.

It was not enough to activate the deep muscle tissue of the body.

Therefore, in recent years, slowly varying medium frequencies (7kHz~
By passing an alternating current (referring to a frequency of 15kHz) through the body,
Products have been proposed that activate even the deep muscle tissue of the body.

When a therapeutic current is passed through electrodes attached to the body using such an electric therapy device, a cross-sectional current flows through muscles related to the limbs, joints, etc., and can activate deep muscle tissue in the body. can.

``Problems to be Solved by the Invention'' However, in the case of the above-mentioned conventional electric therapy device, only one medium frequency electric signal is selected from among the medium frequencies and supplied to the body, so sufficient electrical stimulation is not achieved. The disadvantage was that it was not possible to give

An object of the present invention is to provide an electric therapy device that can sufficiently apply electrical stimulation to muscle tissue.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a voltage controlled oscillator which oscillates a frequency modulated signal and whose level is varied according to an input voltage; A medium frequency oscillator whose frequency is modulated by a frequency modulated signal from a voltage controlled oscillator, a low frequency oscillator which oscillates a low frequency signal with a low frequency, and a 7 kI (z ~ 1
The present invention proposes an electric therapy device characterized by comprising an amplitude modulator that obtains a treatment signal by modulating the amplitude of a 5 kHz medium frequency wave with a low frequency signal from the low frequency wave.

``Effect'' The medium frequency varies in the frequency band that has the effect, centering on the medium frequency that has a high relaxing and activating effect on muscle tissue.

Further, the medium frequency frequency modulated in this manner is amplitude modulated with a low frequency to form a treatment signal. When the therapeutic signal configured in this manner is supplied to the body, a therapeutic current flows deep into the body, and the therapeutic effect can be enhanced.

``Example'' An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an electric therapy device according to the present invention.

In FIG. 1, a variable resistor 10 is connected to a main power source, and the output variable voltage of the variable resistor 10 is inputted to a control terminal of a voltage controlled oscillation circuit (VCO) 11. By varying the movable portion of the variable resistor 10, the output variable voltage changes, and the oscillation frequency of vCOll is varied.

The oscillation output of this vCOll is controlled by the variable resistor 12 for level adjustment.
The oscillation signal adjusted by the variable resistor 12 is supplied to the amplifier 14 via the resistor 13.

A variable resistor 15 and a semi-fixed variable resistor 16 are connected in parallel to the main power supply, and the variable terminal of the resistor 15 is connected to the b contact of the switch 17, and the variable terminal of the resistor 16 is connected to the switch 1.
7, respectively.

A movable contact C of the switch 17 is connected via a resistor 18 to a terminal for varying the amplification factor of the amplifier 14.

The output terminal of the amplifier 14 is connected to the control terminal of a medium frequency oscillator 20 capable of oscillating a frequency (medium frequency) of 7 kHz to 15 kI (z), and this medium frequency oscillator 20 is
7 centered around a frequency of 11 kHz depending on the output signal of 4.
It is designed to oscillate between kHz and 15kHz, and can be output as a type of frequency modulation signal.

The output of this medium frequency oscillator 20 is connected to a variable resistor 21, so that the level of the medium frequency signal is varied by the variable resistor 21 and supplied to a low pass filter 22.

The low-pass filter 22 is configured to remove unnecessary harmonic components from the inputted medium-frequency signal and supply the medium-frequency signal to the amplitude modulator 23 .

Further, the frequency selection switch 24 is connected to a low frequency oscillator 25, and the low frequency oscillator 25 is configured to oscillate and output a low frequency signal having a frequency of, for example, 18 to 0.055 Hz selected by the frequency selection switch 24. It has become.

The low frequency signal from the low frequency oscillator 25 is supplied to a low pass filter 27 after its level is adjusted by a variable resistor 26 that adjusts the degree of modulation.

The low-pass filter 27 removes unnecessary harmonic components from the input low-frequency signal and supplies the obtained low-frequency signal to the amplitude modulator 23 .

The amplitude modulator 23 amplitude modulates the medium frequency signal with a low frequency signal and outputs the result.

The output of the amplitude modulator 23 is controlled by the control signal of the timer 28.
N, the phase shift circuit 3 via the switch 29 that turns OFF.
It is set to be input as 0.

The phase shift circuit 30 shifts the phase of the input treatment signal by 120 degrees, and inputs its output to the phase shift circuit 31.

The phase shift circuit 31 shifts the phase of the input treatment signal by 120 degrees. Phase shift circuit 30
Let the input signal of the 1st phase shift circuit 30 be the first treatment signal, the output signal of the first phase shift circuit 30 be the second treatment signal, and the output signal of the phase shift circuit 31 be the third treatment signal.

Here, each treatment signal is transmitted to three treatment electrodes 33.34.3.
5, respectively. Each treatment signal is
The phases differ by 120 degrees.

The operation of the embodiment configured in this way will be explained below.

FIGS. 2 to 4 are diagrams for explaining the operation of the embodiment of the present invention.

First, the treatment electrodes 33, 34, 35 are placed on the body, for example on the arm 40.
will be affixed to. Next, VCOII, amplitude modulator 23
, causes the low frequency oscillator 25 to oscillate.

Here, the VCOII is caused to oscillate in a triangular wave as shown in FIG. 2 (,).

The frequency is adjusted by a variable resistor 10, and the level of the output signal is adjusted by a variable resistor 12, and then supplied to an amplifier 14.

In the amplifier 14, the input triangular wave signal is passed through the variable resistor 1.
5 or the voltage V at the level determined by the semi-fixed variable resistor 16.
2(b)), and frequency modulates the medium frequency oscillator 20 with the output signal.

The medium frequency oscillator 20, as shown in FIG.
Outputs a medium frequency signal whose frequency changes from Hz to 12kHz.

In addition, in FIG. 2(c), the vertical axis shows frequency and the horizontal axis shows time. In addition, the output of the medium frequency oscillator 20 is as shown in FIG.
As shown in d), it can also be expressed as a frequency modulation signal in which the amplitude is constant and the frequency changes.

The medium frequency output from the medium frequency oscillator 20 (Fig. 2(d)
) is supplied to the amplitude modulator 23 after its level is adjusted by a variable resistor 21 and unnecessary components are removed by a low-pass filter 22 .

Furthermore, the output signal of the low frequency oscillator 25 (FIG. 2(e)) set to a constant frequency by the frequency selection switch 24 is as follows.
The level is adjusted by a variable resistor 26, and a low pass filter 27
Unnecessary components are removed.

The low frequency signal from the low pass filter 27 is input to the amplitude modulator 23 to amplitude modulate the medium frequency signal.

The treatment signal which is the output signal of the amplitude modulator 23 (FIG. 2(f)
)) is output as the first treatment signal via switch 29.
is supplied to the treatment electrode 33 and the phase shift circuit 30
is input.

The second treatment signal phase-shifted by 120 degrees by the phase shift circuit 3o is supplied to the second treatment electrode 34 and also to the phase shift circuit 31.

The third treatment signal phase-shifted by 120 degrees by the phase shift circuit 31 is supplied to the third treatment electrode 35.

When the first to third treatment electrodes 33, 34, and 35 are used in this manner and a three-phase treatment signal is supplied to them, a treatment current flows within the muscle tissue of the arm 4o, resulting in a therapeutic effect, as shown in the figure. goes up.

Note that by adjusting the level of the triangular wave output from the VCO II with the variable resistor 12, the medium frequency oscillator 20
undergoes frequency modulation according to the triangular wave level. For example, as shown in Figure 3, at 11, 7kHz centered around Hz
It can be a medium frequency signal modulated between z and 15.

Furthermore, when the amplifier 14 does not output a triangular wave signal, the medium frequency oscillator 20 outputs a medium frequency signal that is not frequency modulated. For example, when the level of the triangular wave signal is adjusted to zero with the variable resistor 12, the switch 1
When 7 is set to the a contact side, the middle frequency oscillator 20 is located at the center 11.
Outputs kHz.

Also, if the switch 17 is set to the b contact side, the variable resistor 15
You can select medium frequencies from 7kHz to 15kHz.

In this way, the medium frequency is mainly used, and this is frequency modulated,
It has also been confirmed through experiments that when the amplitude-modulated treatment signal is supplied to an electrode attached to the skin 41, it penetrates through the subcutaneous layer 42 and into the muscle tissue 43, as shown in FIG. 4(a).

This is because the conventional treatment using low frequency signals is
This means that the therapeutic effect is significantly higher than in the case where the therapeutic current does not reach the muscle tissue 43 as shown in FIG.

Thus, it can be seen that the electric therapy device of the present invention has high relaxation and activation effects.

It should be noted that among the medium frequencies, 1lkl (z) is known to have a high relaxing and activating effect, and the device of the present invention whose frequency changes around 11 kHz can greatly enhance the therapeutic effect.

"Effects of the Invention" As explained above, according to the present invention, it is possible to supply the body with a therapeutic signal obtained by amplitude modulating a medium frequency of 7 kHz to 15 kHz, which varies in a frequency range with high therapeutic effect, at a lower frequency. , it is possible to sufficiently apply electrical stimulation to the muscle tissue, thereby enhancing the relaxation and activation effects on the muscle tissue and enhancing the therapeutic effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the electric therapy device according to the present invention, FIG. 2 is a waveform diagram for explaining the operation of the embodiment of the present invention, and FIG. Figure 4 is a penetration diagram of the main parts of the skin, Figure 4 (a) shows the therapeutic effect of the device of the present invention using medium frequency, and Figure 4 (b) shows the therapeutic effect of low frequency. be. 11...vC○ 20...Mid-frequency oscillator 23...Amplitude modulator 25...Low-frequency oscillator 3o, 31...Phase shift circuit 33.35.35...Electrode patent Mullen Beck Gerhard Georg Diagram (b) Diagram Diagram

Claims (1)

[Claims] A voltage-controlled oscillator that oscillates a frequency-modulated signal and whose level is varied according to an input voltage; a medium-frequency oscillator whose frequency is modulated by the frequency-modulated signal from the voltage-controlled oscillator; a low frequency oscillator that oscillates a low frequency signal with a low frequency, and an amplitude modulator that modulates the amplitude of a 7 kHz to 15 kHz medium frequency from the medium frequency oscillator with the low frequency signal from the low frequency to obtain a treatment signal. An electric therapy device characterized by: