JP2014054451A - Electric stimulation output circuit and electrostimulator comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric stimulation output circuit capable of outputting treatment waves capable of bringing about a great treatment effect, while simplifying a configuration and making costs low, and an electrostimulator comprising the same.SOLUTION: An electric stimulation output circuit A includes a mask signal generation circuit 1 and a treatment wave generation/selection circuit 2. Continuous AC waves or some of the continuous AC waves can be extracted as treatment waves by using a mask signal, and either the continuous AC waves or some of the continuous AC waves can be selectively output as the treatment waves.

Description

  The present invention relates to an electrical stimulation output circuit for applying electrical stimulation by outputting an electrical therapeutic wave to a human body, and an electrical stimulation device incorporating the electrical stimulation output circuit.

  In electrical stimulation, in order to stimulate muscles, it is necessary to be able to obtain strong stimulation with high-power treatment waves, but when strong stimulation is performed, it is necessary to avoid unpleasant electrical stimulation There is also. For this reason, there has been proposed one that can variously control a pulsed alternating wave that is a therapeutic wave (see, for example, Patent Document 1).

JP 2010-184113 A

  However, in the prior art, the configuration for the control is complicated and expensive, and the feasibility is extremely poor.

  An object of the present invention is to provide an electrical stimulation output circuit capable of outputting a therapeutic wave that has a simple configuration and is inexpensive, and can provide a high therapeutic effect, and an electrical stimulation device including the electrical stimulation output circuit.

  The electrical stimulation output circuit according to claim 1 has an output conversion circuit that converts a part of a continuous alternating current wave into a therapeutic wave and outputs the therapeutic wave.

  The electrical stimulation output circuit according to claim 2 is characterized in that the output conversion circuit is provided with a mask signal generation circuit for generating a mask signal used for extracting a part of the continuous AC wave.

  The electrical stimulation output circuit according to claim 3, wherein the mask signal generation circuit generates a trigger signal generation unit that generates a trigger signal that indicates the timing of the output, and a zero cross signal that indicates a zero cross position of the continuous AC wave And a mask signal generation unit that generates the mask signal based on the trigger signal and the zero cross signal.

  According to claims 1 to 3, it is possible to extract a part of a continuous AC wave as a treatment wave with a simple and inexpensive configuration. Compared to the rectangular wave used for low frequency treatment, a mild irritation can be obtained, low frequency treatment with high output can be easily performed, and an increase in treatment effect can be expected without causing discomfort and pain.

  The part of the continuous AC wave is preferably one period of the continuous AC wave, but is not limited to this, and may be a plurality of periods or a part within one period of the continuous AC wave. Good. Moreover, the frequency and waveform of a continuous alternating current wave are not specifically limited, The frequency and waveform according to the treatment objective may be sufficient.

  The electrical stimulation output circuit according to claim 4, wherein the output conversion circuit extracts the part of the continuous AC wave as a treatment wave using the mask signal generated by the mask signal generation circuit, and A therapeutic wave generation / selection circuit is provided that selectively outputs a continuous AC wave or the part as a therapeutic wave.

The electrical stimulation output circuit according to claim 5, wherein when the continuous AC wave is selected as a treatment wave in the treatment wave generation / selection circuit, an output for medium frequency treatment and / or interference wave treatment, When the part is selected as a treatment wave, the part is output as an output for low-frequency treatment. According to the fourth and fifth aspects, a continuous treatment wave used for the treatment of the medium frequency and the interference wave and a pulse wave used for the treatment of the low frequency treatment can be obtained from one circuit. It can be performed.

  The electrical stimulation device according to claim 6 has the electrical stimulation output circuit.

  The electrical stimulation apparatus according to claim 7 has mode selection means for selecting a mode of low frequency therapy, medium frequency therapy and / or interference wave therapy.

  According to the sixth and seventh aspects, since a medium frequency, interference wave, and low frequency treatment wave can be obtained with one circuit, a medium frequency, interference wave, and low frequency treatment wave can be obtained in one apparatus. There is no need to mount a circuit, and the apparatus can be simple, inexpensive, small, and lightweight. Moreover, since the treatment of medium frequency, interference wave, and low frequency can be performed by one unit, even if the space for the treatment room or the like where the apparatus is installed is narrow and the treatment devices for medium frequency, interference wave, and low frequency cannot be installed, 1 It is possible to handle only with a stand, and it is possible to freely select and carry out treatment of medium frequency, interference wave, and low frequency according to the patient's symptoms, etc. Compared to the case where each frequency treatment device is installed, the patient does not have to wait for a specific device and the desired treatment can be performed efficiently.

  The electrical stimulation device according to claim 8 is characterized in that treatment can be performed while changing a low frequency, a medium frequency, and / or an interference wave as the treatment wave.

  The present invention can output a wide variety of treatment waves with a mild and high therapeutic effect with a simple and inexpensive configuration.

FIG. 1 is a block diagram of an electrical stimulation output circuit according to an embodiment of the present invention. FIG. 2 is a timing chart of signals in each part of the electrical stimulation output circuit. FIG. 3 is a block diagram of an electrical stimulation device incorporating an electrical stimulation output circuit.

  Hereinafter, an electrical stimulation output circuit according to an embodiment of the present invention and an electrical stimulation apparatus incorporating the electrical stimulation output circuit will be described with reference to the accompanying drawings.

  The electrical stimulation output circuit will be described with reference to FIGS. The electrical stimulation output circuit A according to the embodiment includes a mask signal generation circuit 1 and a treatment wave generation / selection circuit 2, and these circuits 1 and 2 convert a continuous alternating current wave or a part of the continuous alternating current wave into a therapeutic wave. An output conversion circuit for converting and outputting is configured.

  The mask signal generation circuit 1 generates a mask signal used for extracting a part of the continuous AC wave (hereinafter referred to as an AC extraction wave), and the treatment wave generation / selection circuit 2 includes: While extracting an alternating current wave as a treatment wave using the mask signal, either the continuous alternating current wave or the alternating current extraction wave can be selected and output as a treatment wave.

  The mask signal generation circuit 1 generates a mask signal used for extracting the part by masking a part other than the continuous AC wave output, and includes a trigger signal generation unit 1a and a zero cross signal generation unit 1b. And a mask signal generation unit 1c.

The generation of the mask signal will be described with reference to FIG. 2. FIG. 2 (a) shows the waveform of the continuous AC wave, FIG. 2 (b) shows the waveform of the mask signal, and FIG. The waveform of an alternating current extraction wave is shown.

  The trigger signal generation unit 1a generates a trigger signal that instructs the output timing of the mask signal. When the trigger signal is input, the zero-cross signal generation unit 1b generates a zero-cross signal corresponding to the zero-cross position of the continuous AC wave in FIG. When a trigger signal is input from the trigger signal generation unit 1a, the mask signal generation unit 1c corresponds to one period T of a continuous AC wave, as shown in FIG. A mask signal having a pulse width to be generated is generated.

  Although not shown, the mask signal generator 1c connects, for example, the inverted output terminal of the first stage D flip-flop to the input terminal of the next stage D flip flop, and inputs the trigger signal to the input terminal of the first stage D flip flop. When a zero-cross signal is input as a clock to the clock terminal of the D flip-flop at the next stage and the output from each output terminal of the D flip-flop is input to the AND gate, a mask signal can be obtained from the AND gate. May be.

  As described above, when the mask signal from the mask signal generation circuit 1 is at a high level, the treatment wave generation / selection circuit 2 is configured to generate the alternating current that is a part of a continuous alternating current wave as shown in FIG. The extracted wave is extracted as a therapeutic wave, and either the continuous AC wave or the AC extracted wave is selected as a therapeutic wave and output. The therapeutic wave generation / selection circuit 2 may include a multiplexer inside for the selection.

  From the above, in the electrical stimulation output circuit A of the present embodiment, the selection mode determined by the treatment wave selection signal input to the treatment wave generation / selection circuit 2 is the treatment mode by the medium frequency or the treatment mode by the interference wave. When the selection mode is the low frequency treatment mode, the AC extraction wave of FIG. 2C is output as the treatment wave.

  Therefore, in the electrical stimulation output circuit A of the present embodiment, the continuous AC wave used for the treatment of the medium frequency and the interference wave and the AC extraction wave used for the low frequency treatment can be obtained from one circuit. Electrical stimulation treatment can be performed. The low-frequency treatment mode is a mode in which treatment is performed with a low-frequency electrical stimulation current of about 1 Hz to several hundred Hz, and the medium-frequency treatment mode is a mode in which treatment is performed with a medium-frequency electrical stimulation current of about 1 kHz to 10 kHz. The interference wave treatment mode is a mode in which two or more types of relatively high medium frequencies are used, and treatment is performed using an interference current (beat) corresponding to the frequency difference between the medium frequencies.

  In addition, when the AC extracted wave output from the electrical stimulation output circuit A of the present embodiment is used as a sine wave for low frequency treatment, it is milder compared with the rectangular wave generally used for conventional low frequency treatment. A low frequency treatment with high output can be easily achieved, and an increase in therapeutic effect can be expected without causing discomfort and pain.

  In the present embodiment, as described above, a part of a continuous AC wave can be extracted as a treatment wave with a simple and inexpensive configuration, particularly when the continuous AC wave is a sine wave and the frequency is low. Compared to the conventional square wave used for low frequency treatment, a mild irritation can be obtained and low frequency treatment at high power can be easily performed, increasing the therapeutic effect without causing discomfort and pain. Can be expected.

  In the electrical stimulation output circuit A of the present embodiment, for example, the zero cross signal generation unit 1b, the mask signal generation unit 1c, and the like may be configured by an IC capable of programming such as an FPGA (Field Programmable Gate Array).

  With reference to FIG. 3, the electrical stimulation apparatus provided with the electrical stimulation output circuit A of this embodiment is demonstrated. This electrical stimulator B has n channels. Since all channels have the same configuration, for convenience of explanation, one channel (ch) will be described. This channel includes an oscillator 3 that oscillates and outputs a continuous AC wave, and the configuration shown in FIG. It has an electrical stimulation output circuit A, an output intensity setting circuit 4, an output amplifier circuit 5, a transformer 6, an output connector 7, and a pair of conductors 8 and 9. The same applies to the other channels 2 to n.

  The control unit 10 controls the circuits in each channel, and outputs a treatment mode to the electrical stimulation output circuit A. Therefore, the control part 10 can comprise the mode selection means which selects the mode of low frequency treatment, medium frequency treatment, and / or interference wave treatment.

  The continuous AC wave output from the oscillator 3 is input to the electrical stimulation output circuit A. The electrical stimulation output circuit A selects and outputs a continuous AC wave as a treatment wave when the selection mode input from the control unit 10 is a treatment mode using a medium frequency or a treatment mode using an interference wave. When in the low frequency treatment mode, an AC extracted wave is output as a treatment wave.

  The therapeutic wave output from the electrical stimulation output circuit A is set in intensity by the output intensity setting circuit 4, amplified by the output amplifier circuit 5, and passed to the conductors 8 and 9 via the transformer 6 and the output connector 7. Is output. In the present embodiment, the electrical stimulation output circuit A is provided between the transmitter 3 and the output intensity setting circuit 4, but the position where the electrical stimulation output circuit A is provided is not limited to this position.

  From the conductors 8 and 9, a treatment wave as an electrical stimulation current is applied to a human body (not shown), and the necessary electrical stimulation treatment is performed.

  In addition, the control part 10 may perform control which can treat, changing a low frequency, a medium frequency, and / or an interference wave as a treatment wave.

  In this electrical stimulation device B, it is not necessary to mount a circuit for obtaining a medium frequency, interference wave, or low frequency treatment wave in one device B, and the device configuration is simple, inexpensive, small, and lightweight. It is configured.

  Further, in this electrical stimulation apparatus B, since the treatment of medium frequency, interference wave, and low frequency can be performed by one unit, the space for the treatment room or the like in which the apparatus is installed is narrow, and the treatment apparatus for medium frequency, interference wave, and low frequency, respectively. Even if it cannot be installed, it can be handled with only one unit, and it is possible to select and carry out treatment of medium frequency, interference wave, and low frequency according to the patient's symptoms etc., for example, introduce multiple units of this device Compared to the case where therapeutic devices for medium frequency, interference wave, and low frequency are installed, the patient does not have to wait for a specific device, and the desired treatment can be performed efficiently. Can do.

  In this electrical stimulation apparatus B, in addition to the combination of medium frequency treatment, interference wave treatment, and low frequency treatment, a combination of medium frequency treatment and low frequency treatment may be used, and various combinations such as combinations of interference wave treatment and low frequency treatment may be used. Combinations are possible.

  Note that the AC extraction wave of this embodiment may be appropriately amplitude-modulated or frequency-modulated appropriately according to the purpose of treatment. Moreover, you may control various generation | occurrence | production periods and rest periods of an alternating current wave with a mask signal. For example, an AC extraction wave may be generated every time one to a plurality of cycles of a continuous AC wave are controlled by controlling the mask signal.

In addition, although the alternating current extraction wave of this embodiment is 1 period of this continuous alternating current wave as a part of continuous alternating current wave, it is not limited to this, By controlling a mask signal, 1 period of continuous alternating current wave The extracted AC wave may be an AC extracted wave obtained by extracting a plurality of continuous AC waves, and may be extracted according to the purpose of treatment. Moreover, the frequency and waveform of a continuous alternating current wave are not specifically limited, The frequency and waveform according to the treatment objective may be sufficient.

A electrical stimulation output circuit B electrical stimulation device 1 mask signal generation circuit 1a trigger signal generation unit 1b zero cross signal generation unit 1c mask signal generation unit 2 treatment wave generation / selection circuit

Claims (8)

It has an output conversion circuit that converts a part of continuous AC wave into a treatment wave and outputs it
An electrical stimulation output circuit characterized by the above. The output conversion circuit is provided with a mask signal generation circuit for generating a mask signal used for extracting a part of the continuous AC wave.
The electrical stimulation output circuit according to claim 1. The mask signal generation circuit includes:
A trigger signal generation unit for generating a trigger signal for instructing the timing of the output;
A zero-cross signal generating unit that generates a zero-cross signal indicating a zero-cross position of the continuous AC wave;
A mask signal generation unit that generates the mask signal by the trigger signal and the zero-cross signal;
The electrical stimulation output circuit according to claim 2, further comprising: The output conversion circuit uses the mask signal to extract a part of the continuous AC wave as a treatment wave, and to select and output the continuous AC wave or a part of the AC wave as a treatment wave. A selection circuit is provided,
The electrical stimulation output circuit according to claim 2, wherein the electrical stimulation output circuit is provided. The therapeutic wave generation / selection circuit outputs the intermediate alternating current wave as a therapeutic wave when the continuous AC wave is selected as the therapeutic wave, and outputs the one wave when the part is selected as the therapeutic wave. Output part for low frequency treatment,
The electrical stimulation output circuit according to claim 4.   An electrical stimulation apparatus comprising the electrical stimulation output circuit according to claim 1. Having mode selection means for selecting a mode of low frequency treatment, medium frequency treatment and / or interference wave treatment,
The electrical stimulation apparatus according to claim 6. Treatment can be performed while changing the low frequency, medium frequency and / or interference wave as the therapeutic wave,
The electrical stimulation apparatus according to claim 6 or 7, wherein

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