KR20140144009A - Apparatus for measuring bioelectric signal - Google Patents

Abstract

The present invention relates to an apparatus for measuring a bioelectric signal. The apparatus for measuring a bioelectric signal includes: first and second electrodes having mutually different polarities and attached on an examinee to output bioelectric signals; a virtual ground unit connected to the first and second electrodes to provide reference electric potentials of the first and second electrodes; a pre-amplifier connected to the first and second electrodes and for extracting a signal having a component different from those of the bioelectric signals from the bioelectric signals to amplify the extracted bioelectric signals; and at least one amplifier for amplifying the signal output from the pre-amplifier, where the virtual ground unit includes first and second resistors connected in serial between the first and second electrodes, connected between the first and second resistors and a ground voltage which is equal to that of the bioelectric signal measuring apparatus. Thus, instead of generating the reference potentials by using the signal output from the skin of the examinee, the reference potential of the signal for sensing the bioelectric signal by using the ground voltage used in the measuring apparatus, so that the stability of the measured bioelectric signal is improved, thereby improving the reliability of the measured bioelectric signal.

Description

[0001] APPARATUS FOR MEASURING BIOELECTRIC SIGNAL [0002]

The present invention relates to a living body signal measuring apparatus.

Currents produced by the heart in the human thorax flow along the skin, and the skin makes a voltage difference that can be measured between electrodes raised to two positions on the skin. Typical tests performed by attaching an electrode to the subject of the subject (i.e., the person who outputs the biological signal to be measured) include ECG (Electro Cardio Graphy) signal measurement that measures the potential associated with the heartbeat, Electromyogram signal measurement, which is a curve recording the action potential, and brain wave measurement to measure brain waves.

To measure electrocardiogram signals, EMG signals, and brain waves, several electrodes are attached to the corresponding positions of the skin to obtain a desired signal waveform.

At this time, when the contact state of at least one of the electrodes attached to the skin is not normal for measuring a bio-signal such as an electrocardiogram signal, an electromyogram signal, and an electroencephalogram signal, accurate measurement of a living body signal is not performed.

In addition, as the number of electrodes attached to the skin increases, the position of the electrodes attached to the skin changes due to the movement of the examinee attaching the electrodes to the corresponding positions of the skin, or the adhesion of the electrodes is weakened, There is a problem in that an error occurs in the data.

As described above, as the number of electrodes attached to the skin increases, the accuracy of the measured biological signals decreases and the inconvenience of the examinee increases.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art.

Another technical problem to be solved by the present invention is to reduce the inconvenience of the examinee.

According to an aspect of the present invention, there is provided a bio-signal measuring apparatus comprising first and second electrodes having different polarities and attached to a subject and outputting a bio-signal, the first and second electrodes being connected to the first and second electrodes, A virtual ground unit for providing a reference potential of the second electrode, a preamplifier unit connected to the first and second electrodes, for extracting and amplifying only different components of the bio-signals output from the first and second electrodes, And at least one amplifying unit for amplifying a signal output from the preamplifier unit, wherein the virtual grounding unit includes first and second resistors connected in series between the first and second electrodes, and first and second resistors connected in series between the first and second electrodes, And the ground voltage is equal to the ground voltage of the bio-signal measuring device.

The first and second resistors each have a resistance value of 1 M? To 10 M?, And the third resistor has an average resistance value of the first and second resistors.

The biological signal may be an electrocardiogram signal, an EMG signal or a brain file.

When the living body signal is an electrocardiogram signal, the bandpass filter unit may have a signal passband of 0.1 Hz to 50 Hz, and when the living body signal is an EMG signal, the bandpass filter unit may have a signal passband of 0.1 Hz to 1 KHz have.

The biological signal measurement apparatus may further include a band stop filter unit connected to the at least one amplification unit and removing a frequency signal in a frequency band of 50 Hz to 70 Hz.

When the biological signal is a brain file, the band pass filter unit may have a signal pass band of 0.1 Hz to 30 Hz.

The bio-signal measuring device according to the above feature may further include a body having a polyhedron shape, a first electrode part and a second electrode part which are respectively located on different surfaces of the body and connected to the first electrode and the second electrode, And a connection part which is located on a surface different from the surface on which the first electrode part and the second electrode part are located and is connected to another block.

The biological signal measuring apparatus may further include a data connection connector located on a surface different from a surface on which the first electrode unit, the second electrode unit, and the connection unit are located and being connected to an output terminal of the at least one amplification unit .

The bio-signal measuring apparatus may further include an external connection terminal having a connector having a first electrode unit and a second electrode unit connected to each other and a connection terminal connected to the first and second electrodes, respectively.

The bio-signal measuring apparatus includes a body having a polyhedron shape, a first electrode unit spaced apart from the first electrode unit and connected to the first electrode and the second electrode, A connecting portion which is located on a surface different from the surface on which the first electrode portion and the second electrode portion are located and is connected to another block, and a surface on which the first electrode portion, the second electrode portion, A mounting band may be inserted and connected to each of the viewing faces to include a coupling portion.

According to this aspect, the number of electrodes to be adhered to the subject's skin is two to reduce the number of electrodes in order to measure a living body signal such as an electrocardiogram signal, an electromyogram signal, and an EEG signal.

This reduces the inconvenience of the user because the number of electrodes attached to the skin of the examinee is small, and the accuracy of the bio-signal measurement is improved by reducing the number of electrodes whose adhesion decreases due to the user's movement.

Further, instead of generating a reference potential (e.g., ground potential) using a signal output from the skin, a reference potential of a signal for sensing the biological signal is provided using the ground voltage used in the measuring apparatus, The reliability of the measured biological signal is increased.

1 is a block diagram of an electrocardiogram signal measuring apparatus, which is an example of a bio-signal measuring apparatus according to an embodiment of the present invention.
2 is a block diagram of an apparatus for measuring an EMG signal, which is another example of a bio-signal measuring apparatus according to an embodiment of the present invention.
FIG. 3 is a view showing an example of the structure of a bio-signal measuring apparatus according to an embodiment of the present invention, wherein (b) is a view when (a) is rotated by 180 degrees.
4 is a view showing another example of the structure of a bio-signal measuring apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Hereinafter, a bio-signal measuring apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, referring to FIG. 1, an electrocardiogram signal measuring apparatus will be described in detail as an example of a bio-signal measuring apparatus according to an embodiment of the present invention.

1, an electrocardiogram measuring circuit of an electrocardiogram measuring apparatus according to an embodiment of the present invention includes a first electrode 11 which is a positive electrode and a second electrode which is a negative electrode 12, an imaginary ground unit 20 connected to the electrode unit 10, a preamplifier unit 30 connected to the electrode unit 10, a preamplifier unit The bandpass filter unit 40 and the bandpass filter unit 40 are connected in series to the first and second amplification units 50 and 60.

In this example, a signal output from the second electrode 12, which is a (-) pole, is used as a reference signal in the preamplifier 30 and a signal output from the first electrode 11, which is a (+) pole, It is used as an electrocardiogram measurement signal for measuring a desired electrocardiogram signal.

Therefore, the second electrode 12, which is a (-) pole, is attached to the right side of the heart and the first electrode 11, which is a (+) pole, is attached to the right side of the heart to measure the electrocardiogram signal, Is attached to the left side of the heart.

A signal applied through the first electrode 11 and the second electrode 12 is input to the preamplifier unit 20.

The virtual ground unit 20 is provided for providing a ground serving as a reference of signals output from the first and second electrodes 11 and 12. The virtual ground unit 20 includes first and second electrodes 11 and 12, And second resistors R21 and R21 and a third resistor R23 connected between the two resistors R21 and R21 and the ground voltage VGND.

At this time, the ground voltage VGND may be about +0 V, which is equal to the ground voltage used when designing the electrocardiogram signal measuring circuit. The ground voltage VGND may be a portable battery, for example, a rechargeable battery And is externally applied through a non-rechargeable portable battery.

The first and second resistors R21 and R22 may have a value of 1 MΩ to 10 MΩ and the third resistor R21 may have an average resistance value of the first and second resistors R21 and R22.

The first electrode 11 is connected to the ground voltage VGND by the first and third resistors R21 and R23 and the second electrode 12 is connected to the second and third resistors R22 and R23, Is connected to the ground voltage (VGND) by the first and second electrodes 11 and 12 to prevent the first and second electrodes 11 and 12 from being shorted.

At this time, since each of the first and second resistors R21 and R22 has a resistance value of 1 M OMEGA or more, the first and second resistors R21 and R22 serve as high impedances, and do not flow toward the ground voltage VGND, The signals output from the electrodes 11 and 12 are applied to the preamplifier 30.

The preamplifier 20 extracts only the different components except the common signal, which is the same component in the bio-signals applied from the first and second electrodes 11 and 12, and amplifies them.

Since the reference signal is a signal output from the second electrode 12, the pre-amplifier unit 20 removes the same component as the electrocardiogram signal output from the second electrode 12, And extracts only a signal of a component different from that of the second electrode 12 and amplifies the signal.

The preamplifier 20 includes an amplifier 21 and a differential amplifier 22.

The amplifying unit 21 includes first and second operational amplifiers OP1 and OP2 having first and second electrodes 11 and 12 connected to a non-inverting input terminal (+), first and second operational amplifiers OP1 and OP2, Between the inverting input terminals (-) of the operational amplifiers OP1 and OP2 and the resistors R1 and R2 connected between the output terminals and the inverting input terminals (-) of the first and second operational amplifiers OP1 and OP2, And a resistor R3 connected in parallel to each of the resistors R1 and R2.

The differential amplifying unit 22 includes resistors R4 and R5 having one terminal connected to the output terminals of the first and second operational amplifiers OP1 and OP2 of the amplifying unit 21, A third operational amplifier OP3 having an output terminal connected to the band-pass filter unit 40 to which the inverting terminal is connected, a resistor R6 connected to the other terminal of the resistor R5, And a resistor R7 connected between the terminal and the output terminal of the operational amplifier OP3.

The amplifying unit 31 implements a noninverting amplifier circuit by the operational amplifiers OP1 and OP2 and the resistors R1 and R3 and the signal output from the first and second electrodes 11 and 12 is amplified by the non- The gain of the noninverting amplifiers OP1 and OP2 is controlled by the magnitudes of the resistors R1 and R3 and the resistors R2 and R3 Respectively.

The differential amplifier 32 is an amplifier that outputs an output proportional to the difference between the two input signals (+, -), and the gain of the output voltage is determined by the resistors R4-R6.

The amplification degree of the preamplifier 30 having this structure is 10, for example.

The band pass filter 40 passes only a signal having a predetermined frequency band out of the signals output from the pre-amplifier 30, and the frequency band of the signal passed in this example is 0.1 Hz to 50 Hz.

Each of the first and second amplifying units 50 and 60 amplifies the inputted signal by a predetermined amplification degree and outputs the amplified signal. The amplification degree of the first amplifying unit 50 is 10 and the second amplifying unit 60 is 100 .

In this example, two amplifying units 50 and 60 are provided, but the number of amplifying units may be changed. In an alternative example, one or more amplifying units may be provided. you can change it.

The electrocardiogram signal measuring circuit according to the present invention is configured such that, instead of using the right leg driving circuit for grounding providing the reference potentials of the first and second electrodes 11 and 12, the virtual grounding unit uses the ground voltage VGND of the electrocardiogram signal measuring circuit, The reference potential of the first and second electrodes 11 and 12 is stable.

That is, when the right leg driving circuit is used, an electrode (that is, a grounding electrode) connected to the right leg driving circuit is attached to the right leg of the subject to be examined located farther from the heart, Is used as the reference potential of the electrodes (11, 12) for measuring the signal.

However, the intensity of the signal generated at the right leg of the examinee and output from the grounding electrode is weak, and the state of the signal is not constant depending on the movement of the examinee or the attachment state of the grounding electrode.

As a result, the reference potential of the electrodes 11 and 12 is unstable and the state of the signal output from the electrodes 11 and 12 is not stable. Therefore, the safety of the electrocardiogram signal is reduced, and accurate electrocardiogram signals can not be measured.

However, instead of using the signal output from the skin of the examinee's skin, that is, the skin of the right leg, this example uses the voltage (VGND) used as the ground voltage of the living body signal measuring circuit through the virtual ground unit 20, Thereby generating a reference potential of the second electrode 11, 12.

Therefore, the state of the output signal of the first and second electrodes 11 and 12, which output the measured signal based on the imaginary grounding unit 20, is also stable because the ground voltage VGND is stable compared with the signal measured from the skin It is stable. As a result, the electrocardiogram signals measured by the first and second electrodes 11 and 12 are accurate and stable.

Since the electrode for grounding attached to the skin of the subject does not require a separate right leg drive circuit, the structure of the electrocardiogram signal measuring circuit is simplified and the number of electrodes attached to the skin of the examinee is reduced, thereby improving the satisfaction of the user .

Furthermore, since the signal output from the weak right-hand driving circuit is not used, the band-pass filter unit 40 has a signal pass band of 0.1 Hz to 50 Hz, which is less than 60 Hz, which is the frequency of the commercial power source. Therefore, since the signal output from the band-pass filter unit 40 does not include 60 Hz electric noise, a separate band stop filter unit for eliminating the electric noise is omitted. As a result, the structure of the electrocardiogram signal measuring circuit is further simplified.

The virtual ground unit 20 according to the present embodiment is also applied to an electromyogram signal measuring apparatus and an EEG apparatus that output not only an electrocardiogram signal but also an EMG signal and an EEG.

Fig. 2 shows an electromyogram signal measuring circuit provided in the electromyogram signal measuring apparatus when the vital sign measuring apparatus is applied to the electromyogram signal measuring apparatus.

As shown in Fig. 2, the electromyogram signal measuring circuit is similar to the electrocardiogram signal measuring circuit shown in Fig.

However, since the EMG signal has a frequency range of about 0.1 Hz to 1 KHz, it further includes a band stop filter unit for removing a frequency signal of 50 Hz to 70 Hz in order to remove 60 Hz electrical noise.

The structure of the electrode unit 10, the virtual ground unit 20, the preamplifier unit 30, the bandpass filter unit 40, and the first and second amplification units 50 and 60 are the same . At this time, the amplification degree of the preamplifier 30, the first and second amplifiers 50 and 60 is the same as that of the electrocardiogram signal measuring circuit, but the signal pass band of the bandpass filter 40 is different, And may have a signal passband of 0.1 Hz to 1 KHz.

When the bio-signal measuring apparatus is an EEG measuring apparatus for measuring brain waves, the EEG measuring circuit mounted on the apparatus has the same structure as the electrocardiogram signal measuring circuit shown in Fig.

Amplification of the first and second amplification units 50 and 60 due to the difference in the frequency magnitude between the electrocardiogram signal and the brain waves and the range of the signal pass band of the bandpass filter unit 40, The resistance value and the gain of the resistance used in the resistor may be different.

Since the amplification degree of the preamplifier 30 is about 10 and the amplification degree of the first and second amplification units 50 and 60 is 100 and the intensity of the EEG is smaller than that of the electrocardiogram signal, The amplification of the EEG measurement circuit may be larger than that of the EEG measurement circuit.

In addition, the band-pass filter unit of the EEG measurement circuit may have a signal passband of 0.1 Hz to 30 Hz.

As described above, since the EMG signal measuring apparatus and the EEG apparatus also use the virtual ground unit 20 by using the ground voltage (VGND) instead of using the separate ground providing circuit (e.g., the right leg driving circuit) The structure of the device and the EEG device is simplified, and the number of electrodes attached to the skin of the examinee is reduced, thereby improving the satisfaction of the user.

In addition, since the signal state of the ground voltage VGND is stable, the signals output from the first and second electrodes 11 and 12 are stable for measuring the EMG signal and EEG, so that stable and accurate EMG signal measurement is performed .

The bio-signal measuring apparatus having the bio-signal measuring circuit according to an embodiment of the present invention is fabricated into a block shape capable of being fastened to a polyhedron-shaped block such as another hexahedron as shown in FIG.

3, the bio-signal measuring apparatus includes a body 100 having a hexahedral shape, a first electrode unit T11 electrically connected to the first electrode 11, which is a positive electrode, is positioned on one surface of the body 100, And a second electrode portion T12 electrically connected to the second electrode 12, which is a negative electrode, are positioned on two opposite sides of the first electrode T11 opposite to the first electrode T11.

At this time, the data connection connector 13 is located on the opposite side of the first electrode unit T11 and on one side facing the surface on which the first electrode unit T11 is formed, And is electrically connected to the output terminal of the second amplifier 60, which is the output terminal of the signal measuring device.

Therefore, the biometric signal output from the second amplifying unit 60 is output to the data connector 13.

The data connection connector 13 is connected to other blocks to communicate with each other, and can transmit another block of the bio-signal measured through the present block. At this time, the communication of the biological signal can be performed wirelessly or by wire.

An external connection terminal 14 is connected to the other surface on which the first and second electrode units T11 and T12 and the data connection connector 13 are not located.

3, the external connection terminal 14 is connected to the first electrode unit T111 and the connector 15 connected to the second electrode unit T121 through the wiring, Two connection terminals (not shown) formed in the connector 15 and two connection terminals (not shown) connected to the inside of the external connection terminal 14 are electrically connected in correspondence with each other as they are inserted into the connection terminal 14. The first and second electrode portions T111 and T121 connected to the connector 15 through the wiring are electrically connected to the first and second electrodes 11 and 12, respectively.

The first and second electrode units T111 and T121 connected to the connector 15 and the first and second electrode units T11 and T12 to which the body 100 of the bio- The first and second electrodes (not shown) of the living body signal measuring circuit built in the body 100 receive the living body signals generated in the body by being respectively attached to the corresponding body parts of the examinee, 11 and 12, respectively.

A connection portion 16 for connecting to another removable block is disposed on one side of the body 100 where the electrode portions T11 and T12, the data connection connector 13 and the external connection terminal 14 are not located . At this time, the connection portion 16 has protrusions or depressions, and is coupled with connection portions of other blocks having opposite shapes.

Therefore, the user combines the bio-signal measuring device with the bio-signal measurement circuit by using the connection unit 16 to form a desired shape or add a desired function. Since the connecting portion 16 has a detachable structure with other blocks, the coupling state with other blocks can be released if necessary.

One method for measuring an electrocardiogram signal using a bio-signal measuring device having such a structure is to connect a second electrode T12, which is a (-) electrode, to a left hand and a first electrode T11 which is a (+) electrode You can touch it with your right hand.

At this time, since the number of the first electrode units T11 is one and the number of the second electrode units T12 is two, the examinee catches the second electrode unit T12 with two fingers of the left hand, T11) can be attached to the right hand, so that the electrocardiogram signal can be easily measured.

In this case, instead of using the first and second electrode units T11 and T12 attached to the body 100, the external connection terminal 14 may be used instead of the first and second electrode units T11 and T12. The connector 15 inserted in the connector 15 is used.

That is, the first and second electrode units T111 and T121 connected to the connector 15 are attached to the subject's head or face portion for electroencephalogram measurement, and the first and second electrode units T111 and T121 And outputs the measured EEG to the first and second electrodes 11 and 12.

Next, a structure of a living body signal measuring apparatus, that is, an electromyogram signal measuring apparatus, for measuring an EMG signal will be described with reference to FIG.

As shown in FIG. 4, the body 100 of the EMG signal measuring apparatus is also formed of a polyhedron-shaped block such as a hexahedron.

At this time, the first electrode unit T11 and the second electrode unit T12 are positioned apart from each other on one surface. The first electrode unit T11 is electrically connected to the first electrode 11 and the second electrode unit T12 is electrically connected to the second electrode 12 as described above.

The data connection connector 13 is located on the other side where the first and second electrode units T11 and T12 are not located and on the other side is formed a protrusion or a depression for connection with another block. (16) is positioned so that the opposite shape is coupled with the connection of other blocks.

At this time, in order to measure the EMG, a coupling portion (not shown) for connecting a mounting band 17 to the body 100 is additionally provided on each of two opposing surfaces of the body 100 .

At this time, the engaging portion and the mounting band 17 have a structure that can be detached and attached as required.

In the case of this example, the external connection terminal may be omitted.

One of the methods of measuring an EMG signal using an EMG signal measuring apparatus having such a structure is as follows.

First, the mounting band 17 is inserted into the coupling portion, and the other two electromyographic signal measuring devices having a block shape are coupled to each other. In this case, the surfaces of the first and second electrode units T11 and T12 are opposed to each other so that the electrode units facing each other are the same electrode unit. In other words, The first electrode portions T11 are positioned so as to face each other and the second electrode portions T12 are also connected so as to face each other.

Through this connection, the two EMG signal measuring devices are connected to each other in the form of a ring via two mounting bands 17. In this state, the ring-shaped electromyographic signal measuring device is inserted into a region of the subject's wrist, ankle, or forearm where the EMG signal is to be measured, and the first and second electrode portions T11 and T12 provided in the respective measuring devices Contact the affected area of the skin.

As a result, the electromyogram signal, which is a living body signal output through each of the electrode portions T11 and T12, is input to the first and second electrodes 11 and 12 of the electromyogram signal measuring circuit so that an electromyogram signal of a desired region is output do.

Thus, since the bio-signal measuring device is formed in a detachable block form with other blocks, it can be used as a recreation mechanism or a training material for designing a desired form by a user, and a living body signal measuring path for measuring a bio- It is possible to measure the biological signal easily and conveniently, and to check the health condition regardless of the place or time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

10: electrode part 11: anode electrode
12: cathode electrode 20: virtual ground
30: Preamplifier section 40: Bandpass filter section
50, 60: amplifying section 70: band stop filter section
T11, T111: first electrode portion T12, T121: second electrode portion
13: Data connection connector 14: External connection terminal
15: connector 16: connection
17: fixing band 18:

Claims (11)

In the bio-signal measuring device,
First and second electrodes having polarities different from each other and attached to the subject to output a living body signal,
A virtual ground unit connected to the first and second electrodes and providing a reference potential of the first electrode and the second electrode,
A preamplifier connected to the first and second electrodes for extracting and amplifying only different components of the bio-signals outputted from the first and second electrodes,
At least one amplifying unit for amplifying a signal output from the preamplifier unit,
Lt; / RTI >
Wherein the virtual ground is connected between first and second resistors and a ground voltage, the first and second resistors being connected in series between the first and second electrodes,
The ground voltage is equal to the ground voltage of the bio-signal measuring device
Apparatus for measuring biological signals. The method of claim 1,
Wherein the first and second resistors each have a resistance value of 1 M? To 10 M?, And the third resistor has an average resistance value of the first and second resistors. 3. The method according to claim 1 or 2,
Wherein the bio-signal is an electrocardiogram signal, an electromyogram signal, or an EEG signal. 4. The method of claim 3,
Wherein the band pass filter unit has a signal pass band of 0.1 Hz to 50 Hz when the biological signal is an electrocardiogram signal. 4. The method of claim 3,
Wherein the band pass filter unit has a signal pass band of 0.1 Hz to 1 KHz when the biological signal is an EMG signal. The method of claim 5,
And a band stop filter unit connected to the at least one amplification unit and removing a frequency signal in a frequency band of 50 Hz to 70 Hz. 4. The method of claim 3,
Wherein the band pass filter unit has a signal pass band of 0.1 Hz to 30 Hz when the biological signal is brain file. The method of claim 1,
A body having a polyhedral shape,
A first electrode portion and a second electrode portion that are located on different surfaces of the body and are respectively connected to the first electrode and the second electrode,
And a second electrode portion that is located on a surface different from the surface on which the first electrode portion and the second electrode portion are located and is connected to another block,
And a biosignal measuring device. 9. The method of claim 8,
And a data connection connector located on a surface different from a surface on which the first electrode portion, the second electrode portion, and the connection portion are located and connected to an output terminal of the at least one amplification portion. 9. The method of claim 8,
Further comprising an external connection terminal having a connector having a first electrode portion and a second electrode portion connected thereto and having connection terminals respectively connected to the first and second electrodes. The method of claim 1,
A body having a polyhedral shape,
A first electrode portion and a second electrode portion which are located on the same surface of the body and are spaced apart from each other and connected to the first electrode and the second electrode,
A connecting portion located on a surface different from a surface on which the first electrode portion and the second electrode portion are located and connected to another block, and
A mounting band is inserted and connected to each of the surfaces facing the first electrode portion, the second electrode portion, and the surface on which the connecting portion is located and facing each other,
Further comprising:

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