JPWO2020090105A1 - Electrical stimulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric stimulator which is easy to install and does not generate excessive pain at the time of electric stimulation. SOLUTION: A first belt electrode mounted on the knee of the right foot of the human body, a second belt electrode mounted on the knee of the left foot of the human body, and one of the first and second belt electrodes. Control to alternately execute a first mode in which electrical stimulation is performed with the electrode of 1 as a positive electrode and the other electrode as a negative electrode, and a second mode in which electrical stimulation is performed with the other electrode as a positive electrode and the other electrode as a negative electrode. The first mode has a first stimulation pattern that gradually increases the voltage value of the electrical stimulation pulse signal, and a second mode that maintains the voltage value of the electrical stimulation pulse signal at the target voltage value. It is configured by making the stimulation pattern continuous, and each of the electrical stimulation pulse signals is composed of a smoothed square wave in which a square wave is smoothed so that the voltage value gradually approaches a predetermined voltage value, and the second The mode is characterized in that it is composed of a waveform obtained by reversing the forward and reverse of each electrical stimulation pulse signal in the first mode. [Selection diagram] FIG. 11

Description

The present invention relates to a method for controlling an electrical stimulator.

Conventionally, in industries such as medicine and sports, electric muscle stimulation (hereinafter referred to as EMS) that induces skeletal muscle contraction has been performed for muscle building, incontinence management, spinal malformation management, spasticity management, and the like. ..

Patent Document 1 is an electrical stimulation fitting that applies electrical stimulation to a human body using an electrical signal output from an electrical signal output device that outputs an electrical signal, and is an electrical signal output from the electrical signal output device. The first electrode for applying the electric signal to the human body, the second electrode for applying the electric signal output from the electric signal output device to the human body, and the first electrode and the second electrode are held in a separated state. Then, the first electrode is located on one side surface side of the body portion of the human body, the second electrode is located on the other side surface side of the body portion of the human body, and is mounted so as to surround the body portion. The first electrode mounting member having the first electrode holding portion and the electric signal output from the electric signal output device are applied to the human body to have a polarity different from that of the first electrode and the first electrode. A third electrode paired with the electrode of No. 1 and a second electrode holding portion that holds the third electrode and is attached at a position surrounding one knee portion on the side where the first electrode is located. A fourth electrode mounting member having a second electrode and an electric signal output from the electric signal output device are applied to the human body to have a polarity different from that of the second electrode and to be paired with the second electrode. And a third electrode mounting member having a third electrode holding portion that holds the fourth electrode and is mounted at a position that surrounds the other knee portion on the side where the second electrode is located. Disclosed is an electrode for electrical stimulation characterized by having.

Utility Model Registration No. 3194492

The electrical stimulation fitting disclosed in Patent Document 1 described above requires a belt-type electrode to be wound around the body, the knee of the right leg, and the knee of the left leg, so that the wearing work is extremely difficult. It becomes complicated. In addition, it is necessary to design the waveform so as not to give excessive pain to the human body when performing electrical stimulation.

In order to solve the above problems, the electrical stimulator of the present invention has (1) a first belt electrode mounted on the knee of the right foot of the human body and a second belt mounted on the knee of the left foot of the human body. A first mode in which electrical stimulation is performed using an electrode and one of the first and second belt electrodes as a positive electrode and the other electrode as a negative electrode, and the other electrode as a positive electrode and the other electrode as a negative electrode. It has a control unit that alternately executes a second mode of performing electrical stimulation, and the first mode has a first stimulation pattern that gradually increases the voltage value of the electrical stimulation pulse signal and electrical stimulation. It is configured by continuing with a second stimulation pattern that maintains the voltage value of the pulse signal at the target voltage value, and each of the electrical stimulation pulse signals is a square wave so that the voltage value gradually approaches a predetermined voltage value. The second mode is composed of a signal having a waveform obtained by inverting the forward and reverse of each electrical stimulation pulse signal in the first mode. apparatus.

(2) The above (2), characterized in that there is a stimulation stop time in which the voltage value of the electrical stimulation pulse signal is set to 0 when switching from one of the first and second modes to the other mode. The electrical stimulator according to 1).

(3) When the area of the smoothed square wave of the second stimulation pattern is S1 and the area of the square wave that is the basis of the second stimulation pattern is S2, it is the difference between S1 and S2. The electrical stimulator according to (1) or (2) above, wherein the difference area ΔS is 10% or more of the S2.

(4) In the smoothed square wave in the second stimulation pattern, the voltage value at the start end of the pulse width is larger than 0, and at a predetermined position between the start end of the pulse width and the end of the pulse width. The electrical stimulator according to any one of (1) to (3) above, wherein the target voltage value is reached.

(5) The electrical stimulator according to any one of (1) to (4) above, wherein the stimulation time in the first mode is 2 seconds to 6 seconds.

According to the present invention, by adopting the polarity reversal, the electrode can be arranged in only two places, so that the electrode mounting work becomes easy. In addition, since the stimulation intensity is gradually increased immediately after the polarity is switched and the waveform of each pulse signal is smoothed, it is possible to suppress the occurrence of pain due to the sudden electrical stimulation applied to the human body. ..

It is a perspective view of the electric stimulator. The attachment position of the belt electrode is shown, (a) is a front view of the human body, and (b) is a rear view of the human body. It is a top view of the right leg electrode mounting member and the left leg electrode mounting member, and shows the surface opposite to the surface on which the electrodes are located. It is a functional block diagram of an electric signal output device. It is a waveform diagram which shows the signal before processing (FIG. 5A) and the signal after processing (FIG. 5B) in an output voltage generation circuit. It is a waveform diagram which shows the signal before processing (FIG. 6A) and the signal after processing (FIG. 6B) in an output voltage generation circuit. It is a waveform diagram of the base pulse signal generated by a controller. It is a waveform diagram for demonstrating the processing performed by an output synthesis circuit. It is a waveform diagram of the annealed synthesis signal synthesized by an output synthesis circuit. The waveform before the polarity inversion of the annealed composite signal amplified by the output amplifier circuit is shown. The waveform after polarity inversion of the annealed composite signal amplified by the output amplifier circuit is shown. It is an enlarged view which enlarged the waveform of the amplified annealed pulse signal.

(First Embodiment)
Hereinafter, the electrical stimulator 1 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the electrical stimulator. 2A and 2B show the attachment positions of the belt electrodes, where FIG. 2A is a front view of the human body and FIG. 2B is a rear view of the human body.

The electrical stimulator 1 includes an electrical signal output device 20 (corresponding to a control unit), a right leg electrode mounting member 21 (corresponding to a first belt electrode), and a left leg electrode mounting member 22 (second belt electrode). Corresponds to). The right leg electrode mounting member 21 is mounted on the knee of the right leg of the human body. The left leg electrode mounting member 22 is mounted on the knee of the left leg of the human body. Here, the above-knee is a position corresponding to the stop portion of the quadriceps femoris.

The right leg electrode mounting member 21 includes a right leg electrode mounting member 21a, a right leg electrode 21b, a right leg electrode accommodating portion 21c, and a right leg band-shaped conductive portion 21d. The right leg band 21a extends in a band shape, is made of a material that can be expanded and contracted in the longitudinal direction, and has a length exceeding the circumference above the knee of the human body. The left leg electrode mounting member 22 includes a left leg electrode mounting member 22a, a left leg electrode 22b, a left leg electrode accommodating portion 22c, and a left leg band-shaped conductive portion 22d. The left leg band 22a extends in a band shape, is made of a material that can be expanded and contracted in the longitudinal direction, and has a length exceeding the circumference above the knee of the human body.

The right leg electrode accommodating portion 21c is formed between the right leg band 21a and the right leg band-shaped conductive portion 21d by sewing the outer edge portion of the right leg band-shaped conductive portion 21d formed in a mesh shape to the right leg band 21a. It forms a space for accommodating the right leg electrode 21b. The left leg electrode accommodating portion 22c is formed between the left leg band 22a and the left leg band-shaped conductive portion 22d by sewing the outer edge portion of the left leg band-shaped conductive portion 22d formed in a mesh shape to the left leg band 22a. It forms a space for accommodating the left bundle branch electrode 22b.

Here, a slit may be formed in the right leg electrode accommodating portion 21c by not sewing a part of the outer edge portion of the right leg band-shaped conductive portion 21d to the right leg band 21a. Through this slit, the right leg electrode 21b can be slid into the right leg electrode accommodating portion 21c, or the right leg electrode 21b housed in the right leg electrode accommodating portion 21c can be taken out. Similarly, the left leg band-shaped conductive portion 22d may be formed with a slit for sliding the left leg electrode 22b.

Here, a knit material, a woven fabric, a non-woven fabric, or the like having water retention can be used for the right leg strip-shaped conductive portion 21d (left leg strip-shaped conductive portion 22d). The right leg band-shaped conductive portion 21d (left leg band-shaped conductive portion 22d) comes into contact with the knee of the human body when the right leg electrode mounting member 21 (left leg electrode mounting member 22) is mounted. By impregnating the right leg strip-shaped conductive portion 21d (left leg strip-shaped conductive portion 22d) with a liquid such as water, energization of the human body becomes easy.

The right bundle branch band 21a (left bundle branch band 22a) can be made of a waterproof material. As a result, it is possible to prevent the liquid exuded from the right leg-shaped conductive portion 21d (left leg-shaped conductive portion 22d) from flowing out through the right leg band 21a (left leg band 22a).

The surface of the right leg-shaped conductive portion 21d (left leg-shaped conductive portion 22d) may be water-repellent. As a result, it is possible to prevent the liquid contained in the right leg band-shaped conductive portion 21d (left leg band-shaped conductive portion 22d) from flowing out from the right leg band-shaped conductive portion 21d (left leg band-shaped conductive portion 22d).

FIG. 3 is a plan view of the right leg electrode mounting member 21 and the left leg electrode mounting member 22, and is a surface opposite to the surface on which the electrodes are located (that is, the right leg electrode mounting member 21 and the left shown in FIG. 1). The back surface of the leg electrode mounting member 22) is shown. With reference to the figure, the contact 110A is provided on the right leg electrode mounting member 21. A conductive wire 201A extending from the electric signal output device 20 is connected to the contact 110A. The contact 110A can be composed of, for example, one of a male and a female hook made of a conductive metal. On the other hand, the tip of the conductive wire 201A connected to the contact 110A can be formed by the other hook of the male and female hooks.

The left leg electrode mounting member 22 is provided with a contact 110B. A conductive wire 201B extending from the electric signal output device 20 is connected to the contact 110B. The contact 110B can be composed of, for example, one of a male and a female hook made of a conductive metal. On the other hand, the tip of the conductive wire 201B connected to the contact 110B can be formed by the other hook of the male and female hooks.

A predetermined electricity is generated by operating the electric signal output device 20 in a state where the conductive wire 201A is connected to the contact 110A of the right leg electrode mounting member 21 and the conductive wire 201B is connected to the contact 110B of the left leg electrode mounting member 22. A stimulus can be given.

Here, with reference to FIGS. 1 and 3, a male hook-and-loop fastener 211 is provided on the surface of the right leg electrode mounting member 21 on the side where the right leg electrode 21b is located, and the surface on the opposite side. A female hook-and-loop fastener 212 is provided on (in other words, the surface on the side where the contact 110A is located). The hook-and-loop fastener 211 is provided on one end side of the right leg electrode mounting member 21 in the longitudinal direction, and the hook-and-loop fastener 212 is provided on the other end side of the right leg electrode mounting member 21 in the longitudinal direction.

When the right leg electrode mounting member 21 is wound around the rat neck of the right leg, the fibers of these surface fasteners 211 and 212 are entangled with each other, so that the right leg electrode mounting member 21 is fixed. Similar to the right leg electrode mounting member 21, the left leg electrode mounting member 22 is provided with hook-and-loop fasteners 221 and 222, but details thereof will be omitted.

Next, the configuration of the electric signal output device 20 will be described in detail. FIG. 4 is a functional block diagram of the electric signal output device. With reference to the figure, the electric signal output device 20 includes a controller 201, an output voltage generation circuit 202, an output synthesis circuit 204, a polarity switching circuit 205, an output amplifier circuit 206, an output detection circuit 207, and an output. Includes terminal 208 and output adjustment volume 209.

The output adjustment volume 209 is operated to adjust the output level (in other words, the voltage value of the output pulse waveform), and for example, a volume resistor or a rotary encoder can be used. The controller 201 controls the entire electric signal output device 20, and for example, a CPU (central processing unit) can be used. The controller 201 calculates and processes the input signal received from the output adjustment volume 209 to generate an output level determination signal for determining the output level. For example, when the output adjustment volume 209 is configured by a rotary encoder, the controller 201 performs arithmetic processing on the digital signal generated by the rotary encoder to generate a PWM signal as an output level determination signal. When the output adjustment volume 209 is composed of a volume resistor, the controller 201 performs arithmetic processing on the analog signal generated by the volume resistor to generate a digital signal as an output level determination signal.

Conventionally, the output level has been adjusted in the final stage of the output (specifically, the subsequent stage of the output amplifier circuit 206). However, since the output voltage becomes high (specifically, 100 V or more), it is necessary to increase the size of the output adjustment volume to improve the withstand voltage. On the other hand, by arranging the output adjustment volume 209 in the front stage (that is, the front stage of the controller 201), the required withstand voltage level can be reduced (specifically, about several V), so that the output adjustment volume 209 can be miniaturized. .. As a result, the output adjustment volume 209 can be configured by a component that outputs a digital signal such as an encoder.

Further, the controller 201 generates a continuous pulse signal (hereinafter, the pulse signal output from the controller 201 is referred to as a base pulse signal), and outputs this to the output synthesis circuit 204. The frequency of the base pulse signal is not particularly limited, but may be, for example, 3 Hz or more and 100 Hz or less. The base pulse signal is a smoothed signal obtained by smoothing the rising edge of a rectangular wave (see FIG. 7).

The output voltage generation circuit 202 converts the output level determination signal (digital signal) output from the controller 201 into an analog signal (hereinafter, referred to as an analog voltage signal). FIG. 5A shows a PWM signal as an output level determination signal, and FIG. 5B shows an analog voltage signal obtained by analog-converting the PWM signal. FIG. 6A shows an output level determination signal (digital signal) obtained by arithmetically processing the analog signal generated by the volume resistance, and FIG. 6B shows an analog voltage signal obtained by analog-converting the analog signal. There is.

For the output voltage generation circuit 202, for example, a voltage follower circuit can be used.

The output synthesis circuit 204 corrects the voltage level of the base pulse signal generated by the controller 201 by using the analog voltage signal output from the output voltage generation circuit 202. That is, the output synthesis circuit 204 synthesizes the base pulse signal and the analog voltage signal as shown in FIG. 8 to generate the smoothing synthesis signal shown in FIG.

An operational amplifier may be installed after the output synthesis circuit 204. In this case, the smoothed composite signal is amplified by the operational amplifier and then output to the output amplifier circuit 206. The polarity switching circuit 205 outputs an instruction signal for instructing the output amplification circuit 206 of the signal amplification direction.

The output amplifier circuit 206 is a circuit for amplifying the smoothing synthesis signal output from the output synthesis circuit 204 to the output voltage (therapeutic output), and is smoothing synthesis according to the polarity direction output from the polarity switching circuit 205. Amplifies the signal. For the output amplifier circuit 206, for example, a transformer can be used. The smoothed composite signal amplified by the output amplifier circuit 206 (hereinafter, may be referred to as an amplified smoothed pulse signal) is output to the human body via the conductive wires 201A and 201B connected to the output terminal 208. It should be noted that this amplified annealed pulse signal corresponds to the electrical stimulation pulse signal described in the claims.

The output detection circuit 207 detects how much the amplified annealed pulse signal output from the output terminal 208 has flowed to the load (human body), and outputs the detection result to the controller 201. Here, when the detected value does not reach a desired level, the controller 201 can output a notification signal for notifying the electrode mounting failure or control to stop the electrical stimulation. The notification signal may be a voice output signal or an image signal.

Here, the waveforms of the signals shown in FIGS. 5 to 9 are examples for explaining a signal processing method, and do not constitute an embodiment of the present invention.

The signal waveform of the embodiment of the present invention will be described in detail. FIG. 10 shows the waveform of the amplified annealed pulse signal amplified by the output amplifier circuit 206 before the polarity inversion, and FIG. 11 shows the waveform of the amplified annealed pulse signal amplified by the output amplification circuit 206 after the polarity inversion. The waveform (hereinafter, may be referred to as an electrical stimulation pulse signal) is shown. However, FIGS. 10 and 11 are schematic views, and in actual electrical stimulation, the first mode and the second mode are alternately and continuously performed a plurality of times according to the set time.

With reference to FIG. 11, the electrical stimulation pulse signal can be mode-designed so that the polarities are switched in a cycle of, for example, 7 seconds. That is, the polarity switching circuit 205 can output a polarity signal to the output amplifier circuit 206 so that the polarities are alternately switched at a cycle of 7 seconds.

When the right leg electrode 21b is positive and the left leg electrode 22b is negative polarity, electrical stimulation is mainly applied to the right leg, and when the left leg electrode 22b is positive electrode and the right leg electrode 21b is negative polarity, it is mainly applied to the left leg. Electrical stimulation is applied. Here, the electrical stimulation of the present embodiment is configured by alternately repeating the first mode and the second mode with a stimulation stop time in between.

The first mode is configured by making the first stimulation pattern and the second stimulation pattern continuous. The first stimulation pattern is a stimulation pattern that continuously outputs an amplified annealed pulse signal while gradually increasing the voltage value toward the target voltage value. That is, in the first stimulation pattern, an amplified annealed pulse signal having a predetermined frequency is output, and of the two adjacent amplified annealed pulse signals, the amplified annealed pulse signal located in the subsequent stage is the amplified annealed pulse signal located in the previous stage. It is configured so that the voltage value is larger than the pulse signal. The second stimulation pattern is configured by reversing the amplified annealed pulse signal included in the first stimulation pattern in the forward and reverse directions. The target voltage value can be, for example, 50 to 100 V. The reason will be described later.

The stimulation time in the first mode (second mode) is preferably 2 seconds to 6 seconds, more preferably 3 seconds or 5 seconds. The stimulation rest time is preferably 1 to 3 seconds, more preferably 2 seconds.

The time ratios of the first stimulation pattern and the second stimulation pattern constituting the first mode (second mode) are not particularly limited because they vary depending on the frequency.

FIG. 12 is an enlarged view of an enlarged waveform of the amplified annealed pulse signal (that is, the amplified annealed pulse signal that has reached the target voltage value) in the second stimulation pattern, and is a waveform when the anomaly processing is not performed. Is also shown. For convenience of explanation, the pulse signal when the tanning process is not performed is referred to as a square wave, and the pulse signal when the tanning process is performed is referred to as a tanned square wave. Further, the position where the pulse wave starts is defined as the pulse width start end, and the position where the pulse wave ends is defined as the pulse width end.

The square wave has a rectangular shape, and the annealed square wave has a chamfered shape in which the upper end of the pulse width start portion of the square wave is chamfered. That is, in the smoothed square wave, the voltage value V1 at the beginning of the pulse width is higher than 0, and the voltage curve from the voltage value V1 toward the target voltage value draws a curve curve in which the slope gradually decreases. Further, the end portion of the voltage curve is located closer to the start end portion of the pulse width than the end portion of the pulse width (in other words, the target voltage value continues for a predetermined time). The position corresponding to the end of the voltage curve corresponds to the predetermined position described in the claims.

Here, when the area of the square wave is 100%, the signal is such that the area of the chamfered portion (in other words, the difference area which is the area difference between the square wave and the smoothed square wave) ΔS is at least 10% or more. Is desirable to generate. In other words, when the area of the smoothed square wave in the second stimulation pattern is S1 and the area of the square wave that is the basis of the second stimulation pattern is S2, the area ratio S1 / S2 is preferably 0.9 or less. It is desirable to generate a signal so that

As for the amplified annealed pulse signal included in the first stimulation pattern, a square wave is annealed by the area corresponding to the above ΔS.

Here, when polarity reversal in which the polarities of the two electrodes are alternately switched is executed, pain may occur in the human body due to the voltage difference (in other words, back pulse) before and after the polarity reversal. That is, in the case of the two-channel configuration as shown in Patent Document 1, since it is not necessary to reverse the polarity, the problem due to the back pulse does not occur, but the one-channel configuration premised on the polarity reversal as in the present invention is adopted. In that case, the problem due to the back pulse becomes remarkable. Therefore, in the present embodiment, a time is provided for gradually increasing the stimulus intensity immediately after the polarity is switched, and the waveform of the pulse signal is formed to generate pain due to the sudden electrical stimulus being applied to the human body. It is suppressing.

Here, as described above, the pain given to the human body can be more reliably relieved by performing the tampering treatment so that the ΔS is at least 10% or more. The upper limit of ΔS is not particularly limited, but if it becomes excessive, the stimulation intensity becomes insufficient. Therefore, it is desirable to set the upper limit value of ΔS so that at least the time for maintaining the target voltage value of the amplified annealed pulse signal in the second stimulation pattern is 1/5 or more of the pulse width.

As described above, in the present embodiment, the polarities of the right leg electrode 21b and the left leg electrode 22b are alternately switched so that both the left and right legs can be alternately electrically stimulated. Therefore, unlike Patent Document 1, it is not necessary to have a two-channel configuration of a waist and a right leg and a waist and a left leg, so that the electrode mounting work can be easily performed.

(Modification example 1)
In the above-described embodiment, the voltage value of the pulse waveform at the stimulation stop time is set to 0, but the present invention is not limited to this, and the voltage value may be set to a low voltage value of 0 or more, which is sufficiently smaller than the target voltage value. it can.

(Modification 2)
The circuit configuration of the electric signal output device 20 described above is an example, and the present invention is not limited thereto. For example, the output adjustment volume 209 may be arranged after the output amplifier circuit 206.

The present invention will be specifically described with reference to Examples.
(Example 1)
Various electrical stimuli were applied to subjects A to C using the electrical stimulator of the above embodiment. The electrical stimulation time was 20 minutes, and the presence or absence of pain due to electrical stimulation was evaluated. Subjects A to C were intended for working adults who do not actively engage in training or sports on a daily basis. When almost no pain was felt, it was evaluated as "very good", when the pain was weak and not accompanied by pain, it was evaluated as "good", and when the pain was strong and painful, it was evaluated as "poor".

The target voltage was 50V or 70V. The frequency was 10 Hz or 20 Hz. In Nos. 1, 2, 4, 5, 7, and 8, the square wave was annealed. In Nos. 3, 6 and 9, the tanning process for the square wave was not performed. The smoothing process was performed by the controller 201 as described above. The stimulation time (that is, the time of the first mode (second mode)) was set to 5 seconds. The stimulation stop time was set to 2 seconds.

In Nos. 1, 4 and 7, the evaluation was “very good” because ΔS, which is the area difference between the square wave and the annealed square wave, was 10% or more. In Nos. 2 and 5, the evaluation was “good” because ΔS, which is the area difference between the square wave and the annealed square wave, was less than 10%. In Nos. 3, 6 and 9, the evaluation was "poor" because it was an electrical stimulation by a square wave. In No. 8, ΔS is less than 10%, but the target voltage is small, so it is presumed that the evaluation of subject B is “very good”.

In No. 3, when the target voltage was lowered to 40 V and electrical stimulation was performed, all the subjects evaluated it as less painful electrical stimulation. Here, the effect of electrical stimulation (muscle hypertrophy, etc.) is roughly proportional to the integrated current amount obtained by integrating the current flowing through the human body during electrical stimulation. That is, the larger the integrated current amount, the more effective the electrical stimulation. Therefore, theoretically, even if the target voltage is 40 V, if the electrical stimulation time is lengthened, an effect such as muscle hypertrophy can be exhibited. However, if the electrical stimulation time becomes long, the burden on the user increases, so that the target voltage cannot be lowered excessively. The limit of one electrical stimulation time varies depending on the user, but from the results of the questionnaire, the appropriate electrical stimulation time is preferably 40 minutes or less, and more preferably 30 minutes or less.

Since there is a limitation of the electrical stimulation time as described above, it is desirable that the target voltage is 50 V or more. However, when the target voltage is increased to 50 V or more, as shown in the above test results, excessive pain occurs at the time of electrical stimulation if the square wave remains. An object of the present invention is to raise a target voltage to perform painless electrical stimulation in a relatively short time, and to achieve this object, a square wave is smoothed.

1 Electrical stimulator 20 Electrical signal output device 21 Right leg electrode mounting member 21b Right leg electrode 21c Right leg electrode storage section 21d Right leg band-shaped conductive section 22 Left leg electrode mounting member 22b Left leg electrode 22c Left leg electrode storage section 22d Left leg Band-shaped conductive part 201 Controller 202 Output voltage generation circuit 204 Output synthesis circuit 205 Polarity switching circuit 206 Output amplification circuit 207 Output detection circuit 208 Output terminal

Claims (5)

The first belt electrode mounted on the knee of the right foot of the human body,
A second belt electrode mounted on the knee of the left foot of the human body,
The first mode in which one of the first and second belt electrodes is used as a positive electrode and the other electrode is used as a negative electrode for electrical stimulation, and the other electrode is used as a positive electrode and the other electrode is used as a negative electrode for electrical stimulation. A control unit that alternately executes the second mode to be performed, and
Have,
In the first mode, a first stimulation pattern that gradually increases the voltage value of the electrical stimulation pulse signal and a second stimulation pattern that maintains the voltage value of the electrical stimulation pulse signal at the target voltage value are made continuous. Each of the electrical stimulation pulse signals is composed of an annealed square wave that is a square wave so that the voltage value gradually approaches a predetermined voltage value.
The second mode is an electrical stimulation device characterized in that it is composed of a signal having a waveform obtained by reversing the forward and reverse of each electrical stimulation pulse signal in the first mode. The first aspect of the present invention, wherein there is a stimulation stop time for setting the voltage value of the electrical stimulation pulse signal to 0 when switching from one of the first and second modes to the other mode. Electrical stimulator. When the area of the smoothed square wave of the second stimulation pattern is S1 and the area of the square wave that is the basis of the second stimulation pattern is S2,
The electrical stimulator according to claim 1 or 2, wherein the difference area ΔS, which is the difference between the S1 and the S2, is 10% or more of the S2. In the smoothed square wave in the second stimulation pattern, the voltage value at the start of the pulse width is larger than 0, and the target voltage is at a predetermined position between the start of the pulse width and the end of the pulse width. The electrical stimulator according to any one of claims 1 to 3, wherein the value is reached. The electrical stimulation device according to any one of claims 1 to 4, wherein the stimulation time in the first mode is 2 seconds to 6 seconds.