JP2007097769A - Bioelectrode and its connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bioelectrode with a shield structure for preventing the mixing of disturbance noise, improve its wearing property and miniaturize the bioelectrode and its connecting structure. <P>SOLUTION: This connecting structure comprises the bioelectrode and a clamping clip, and the bioelectrode has a multiple-layered structure, a first insulating layer 41, a shielding layer 42, a second insulating layer 43, an electrode element layer 44 and an electrolyte 45 in descending order. The shielding layer is disposed to cover the electrode element layer and constitutes a clamp part 55 being clamped by exposing a part of a superposed part. A clamping clip body is formed of an insulator, has an upper part structure 49 and a lower part structure relatively movable to each other, when clamping, the lower part structure has a signal wire terminal 47 coming into contact with the electrode element layer, and a signal wire 52 connected thereto and disposed inside the lower par structure, and the upper part structure has a shield terminal 46 coming into contact with the shielding layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bioelectrode suitable for being attached to the skin surface of a living body and a connection structure thereof, and more particularly to a bioelectrode that prevents disturbance noise from being mixed into the bioelectrode and a connection structure thereof.

Electrocardiographic diagnostic techniques using electrocardiographs are rapidly developing in both medical and veterinary fields.
In order to measure this electrocardiogram, it is necessary to attach a bioelectrode for measuring electrocardiogram information directly to the skin on the surface of the living body.
The biological electrode needs to be able to be reliably attached to the living body in order to accurately detect the electrical signal generated in the living body and to reliably detect the electrical signal from the subject's skin surface during the measurement. is there.

  Electrocardiographic bioelectrodes used in conventional ECG telemeter transmitters and portable ECG recorders (Holter ECG) are generally composed of a connector, such as a magnet type, hook type, or tab type, and a lead wire. Is input to the electrocardiographic amplifier through the induced code.

The bioelectrode that induces bioelectricity generated in the living body is a bioelectrode, but the bioelectricity is weak, and the electrical contact state between the electrode and the measurement target part is large in the stability of the bioelectric signal induced from the living body. affect.
The impedance representing the electrical contact state between the part to be measured and the electrode is generally a high value of several tens KΩ to several hundreds KΩ. When this impedance is high, it is easy to receive the noise from the outside.
In particular, in the Holter electrocardiograph, since the subject wears clothing, it is inevitable to receive noise such as static electricity due to friction of the clothing.

An example of a conventional bioelectrode and its connection structure will be described with reference to FIG.
FIG. 9 is a schematic diagram showing a basic structure of a conventional bioelectrode and its connection structure.
The left half of FIG. 9 is a cross-sectional view of the bioelectrode, and the first insulating layer 141, electrode element layer 144, and electrolyte 145 are composed of soft materials from the top.
The electrolyte 145 is a portion that becomes a contact point with the living body, and is made of an adhesive conductive material. The electrolyte 145 is attached to the living body, extracts a biological signal, and is extracted outside through the electrode element layer 144.
The right half is a cross-sectional view of a holding clip for taking out a biological signal from the biological electrode, and a signal line is formed between the upper portion 149 of the holding clip body and the lower portion 150 in which the signal line 152 is formed. A terminal 147 is formed.
With the above-described configuration, the biological signal is guided to the biological signal measuring device (not shown) via the signal line 152.
In the bioelectrode of FIG. 9 and its connection structure, since it does not shield the electrode element layer 144, it is inevitable to receive noise such as static electricity due to friction of clothes.

And what is shown to FIG. 7 and 8 is known as a biological electrode which excludes the influence of a noise.
(See Patent Document 1)
FIG. 7 is a plan view showing the configuration of the bioelectrode, and FIG. 8 is a sectional view thereof.
In the figure, 10 is a bioelectrode member, 20 is a tab-type connector member that clamps the connection member 14 of the bioelectrode member, and 30 is a shield member.
The bioelectrode member 10 is a fixed base material 11, an insulating member 12 that covers substantially the upper part of the electrode, an adhesive conductive gel 13 that constitutes the electrode, and a connection member 14 that leads detection bioelectricity from the conductive gel 13 to the connector member 20. It is configured.

The fixing base material 11 has adhesiveness so as to be fixed to the living body from above the conductive gel 13 so as not to be peeled off from the living body, and the fixing base material 11 leads bioelectricity onto the conductive gel 13. The hole is vacant.
Then, bioelectricity is led out from the hole to the connecting member 14 and connected to the connector 20. The insulating member 12 is disposed on the connecting member 14 for fixing and insulating the connecting member 14.

The shield member 30 having a configuration unique to this example is composed of a conductive gel 32 that adheres to the surface of the living body skin, and a sheet member 33 in which a conductive layer 31 is disposed on the living body contact surface.
The sheet member 33 has a vertically long shape as shown in the figure, covers the electrode main part including the conductive gel 13 part excluding the clamping part of the connector member 20, and further extends in the distal direction from the electrode part. A conductive gel 32 that electrically connects the conductive layer 31 and the biological surface to maintain the conductive layer 31 at the biological surface potential is provided at the extended portion.
Registered Utility Model Publication No. 3020953

Since the conventional shield structure for bioelectrodes requires grounding to a living body, it is sufficient to shield only the electrode electrolyte as a shield member. There is a problem of not becoming.
In addition, since a method of grounding the living body is adopted, a conductive adhesive gel is required, and when the impedance due to adhesion between the conductive adhesive gel and the living body (skin) is high, the grounding effect is lowered. Therefore, there is a problem that the mixing of noise cannot be suppressed.

  An object (object) of the present invention is to provide a living body electrode for measuring a living body signal having a shield structure for preventing disturbance noise from being mixed, and to improve the feeling of mounting on the living body and to provide a living body electrode and a connection structure thereof. The purpose of the present invention is to provide a bioelectrode using a soft material that fits the body in a compact size and a connection structure thereof.

In order to solve the above-mentioned problem, the invention according to claim 1 is a connection structure including a biological electrode and a clamping clip for extracting a biological signal from the biological electrode,
The bioelectrode has a multi-layer configuration of a first insulating layer, a shield layer, a second insulating layer, an electrode element layer, and an electrolyte from above, and the shield layer is disposed so as to cover the electrode element layer. And a part of the overlapping portion of the shield layer and the electrode element layer is exposed to constitute a clamping part that is clamped by the clamping clip, and the body of the clamping clip is formed of an insulator. An upper structure and a lower structure, each of which is relatively movable, wherein the lower structure includes a signal line terminal that contacts the electrode element layer and the signal line terminal when the holding clip is held by the holding portion. And the upper structure is disposed so as to come into contact with the shield layer when the sandwiching clip is sandwiched between the sandwiching portions. Equipped with shield terminal Said pinching clips tightly held the sandwiching portion of the biological electrode, and wherein the deriving the biological signal line and the shield terminal to an external measuring device.

Further, the shield terminal of the upper structure is disposed so as to cover the signal line terminal and the signal line of the lower structure. (Claim 2)
Further, the lower structure of the clip body is provided with a contact point that contacts the shield terminal, the contact point is connected to a braid of a shield wire, the signal line is connected to a core wire of the shield wire, and the shield wire Is derived to an external measuring device. (Claim 3)
Further, in the upper structure of the clip body, the shield terminal is connected to a braid of a shield wire, the signal wire is connected to a core wire of the shield wire, and the shield wire is led to an external measuring device. To do. (Claim 4)
Further, the upper structure and the lower structure of the main body of the holding clip are coupled to each other through a fulcrum so as to be relatively rotatable. (Claim 5)
The upper structure and the lower structure of the main body of the sandwiching clip are coupled so as to be relatively horizontally movable. (Claim 6)

  Further, the bioelectrode used in the connection structure described above, wherein the bioelectrode is formed of a soft material, and includes a first insulating layer, a shield layer, a second insulating layer, an electrode element layer, and the like from above. The electrolyte has a multilayer structure, and the upper insulating layer of the portion sandwiched by the sandwiching clip of the shield layer is removed. (Claim 7)

  Further, the bioelectrode used in the connection structure, wherein the bioelectrode is formed of a soft material, and a first portion including a first insulating layer, a shield layer, and an adhesive layer from above, The second insulating layer, the electrode element layer, and the second portion formed of the electrolyte are divided and formed, and the upper insulating layer of the portion sandwiched by the sandwiching clip of the shield layer is removed. To do. (Claim 8)

  In the bioelectrode and the connection structure thereof according to the present invention, when the bioelectrode for measuring a biosignal has a shield structure for preventing mixing of disturbance noise, the bioelectrode and the connection structure thereof are improved. The body can be made as compact as possible to fit the body.

The bioelectrode of the present invention and the connection structure thereof will be described with reference to FIGS.
Each figure is schematically shown, and in the cross-sectional view, the thickness is drawn larger than other dimensions.
1 and 2 are schematic views showing the basic structure of the biological electrode and its connection structure according to the first embodiment of the present invention.
FIG. 1 is a sectional view thereof, and FIG. 2 is a bottom view thereof.
The left half of FIG. 1 is a cross-sectional view of the bioelectrode. From the top, the first insulating layer 41, the shield layer 42, the second insulating layer 43, the electrode element layer 44, and the electrolyte 45 are made of soft materials. Is formed.
The electrolyte 45 is a portion that becomes a contact point with the living body, and is made of an adhesive conductive material. The electrolyte 45 is attached to the living body, takes out a biological signal, and is taken out through the electrode element layer 44.
The shield layer 42 is configured to cover the electrode element layer 44 by using a soft conductive material such as aluminum foil and sandwiching the upper and lower sides thereof between the first insulating layer 41 and the second insulating layer 43. ing.
Then, one end of the shield layer 42 is removed from the insulating layer 41, together with the second insulating layer 43 and the electrode element layer 44 below the shield layer 42 from which the insulating layer 41 is removed in FIG. The clamping part 55 clamped by this clamping clip is formed.

Further, in FIG. 1, the right half is a cross-sectional view of a holding clip for taking out a biological signal from a biological electrode, and an upper portion 49 (insulator) and a signal line 52 are formed inside the holding clip. A shield terminal 46, a signal line terminal 47, and a contact 48 are formed between the lower portion 50 (insulator), and the shield terminal 46 is disposed so as to cover the signal line terminal 47 and the signal line 52. Yes.
The signal line 52 is connected to a core wire of a shield wire connected to a biological signal measuring device (not shown), and the contact 48 is connected to the braid 51 of the shield wire.
In FIG. 1, the bioelectrode sandwiching portion 55 is sandwiched between the left end of the shield terminal 46 and the signal line terminal 47.
The shield layer 42 is connected to the contact 48 via the shield terminal 46 in a state where the bioelectrode sandwiching portion 55 is sandwiched by the sandwich clip, and the electrode element layer 44 is connected to the signal line terminal 47. To the signal line 52.
With the above-described configuration, the biological signal and the shield layer can be collectively guided to a biological signal measuring device (not shown) via the shield wire.
The shield wire braid 51 is connected to a ground line to the measuring device.

  According to the bioelectrode and its connection structure described in FIGS. 1 and 2, the bioelectrode for measuring a biosignal and the holding clip have a shield structure for preventing the introduction of disturbance noise, thereby improving the feeling of wearing on the living body. In addition, the bioelectrode and its connection structure can be made of a soft material having a compact size and fitted to the body.

FIG. 3 is a view showing the structure of the holding clip in the second embodiment of the present invention.
FIG. 3 is a cross-sectional view of a holding clip for extracting a biological signal from a biological electrode, and shows an upper portion 49 and a lower portion 50 of the holding clip main body in the first embodiment shown in FIGS. This specifically shows the bond.
In FIG. 3, a fulcrum 54 is formed at the right ends of the upper part 49 and the lower part 50 with a pin or the like, and the upper part 49 and the lower part 50 are formed to be relatively rotatable. The lower portion 50 is configured to be biased in a direction in which the lower portion 50 approaches, so that the shield terminal 46 and the signal line terminal 47 sandwich the bioelectrode sandwiching portion and the shield terminal 46 and the contact 48 are brought into contact with each other. Can be made.
Although not shown in FIG. 3, it is also possible to provide a lock mechanism that locks the biological electrode in a sandwiched state.

FIG. 4 is a view showing another structure of the holding clip according to the third embodiment of the present invention.
FIG. 4 is a cross-sectional view of a holding clip for extracting a biological signal from a biological electrode, and shows an upper portion 49 and a lower portion 50 of the holding clip body in the first embodiment shown in FIGS. This specifically shows the bond.
In FIG. 4, the upper portion 49 is formed to be slidable with respect to the lower portion 50, and the bioelectrode sandwiching portion can be sandwiched by sliding the upper portion in the bioelectrode direction.
Also in FIG. 4, although not shown in the figure, it is possible to provide a lock mechanism that locks the biological electrode in a sandwiched state.

FIG. 5 is a view showing still another structure of the holding clip according to the fourth embodiment of the present invention.
FIG. 5 is a cross-sectional view of a holding clip for extracting a biological signal from a biological electrode. This holding clip shields the braid 51 of the shield wire by omitting the contact 48 in FIGS. 1, 3 and 4. The terminal 46 is directly connected.
According to the above configuration, the number of parts can be reduced as compared with the configurations of FIGS.

FIG. 6 is a diagram showing another structure of the bioelectrode according to the fifth embodiment of the present invention.
The bioelectrode of FIG. 6 is formed of a soft material, and includes a first portion including an insulating layer 41, a shield layer 42, and an adhesive layer 53 from the top, and a first portion including an insulating layer 43, an electrode element layer 44, and an electrolyte 45. The first part and the second part are used by being overlapped with the adhesive layer when attached to a living body.
It is to be noted that the upper insulating layer 41 of the sandwiching portion 55 that is sandwiched by the sandwiching clip of the shield layer is removed as in the case of FIG.
By dividing the bioelectrode into a first part and a second part as shown in FIG. 6, it is possible to easily shield the conventional bioelectrode as shown in FIG. is there.

  According to the first to eighth aspects of the present invention, when the living body electrode for measuring the living body signal has a shield structure for preventing the mixing of disturbance noise, the wearing feeling to the living body is improved and the living body electrode and its connection structure are provided. The body can be made as compact as possible to fit the body, and industrial applicability is extremely large.

It is sectional drawing of the bioelectrode of the 1st Embodiment of this invention, and its connection structure. It is a bottom view of the bioelectrode of the 1st embodiment of this invention, and its connection structure. It is a figure which shows the structure of a clamping clip in the 2nd embodiment of this invention. It is a figure which is a 3rd embodiment of this invention and shows another structure of a clamping clip. It is a 4th embodiment of this invention, and is a figure which shows another structure of a clamping clip. It is a 5th embodiment of this invention, and is a figure which shows another structure of a bioelectrode. It is a top view which shows the structure of the conventional bioelectrode. It is sectional drawing which shows the structure of the conventional bioelectrode. It is a figure which shows the basic structure of the conventional bioelectrode and its connection structure.

Explanation of symbols

41 First insulating layer 42 Shield layer 43 Second insulating layer 44 Electrode element layer 45 Electrolyte 46 Shield terminal 47 Signal line terminal 48 Contact point 49 Upper structure of the clip body 50 Lower structure 51 of the clip body 51 Shield wire braid 52 Signal line 53 Adhesive layer 54 Support point 55 Nipping part

Claims (8)

A connection structure composed of a biological electrode and a clamping clip for extracting a biological signal from the biological electrode,
The bioelectrode has a multi-layer configuration of a first insulating layer, a shield layer, a second insulating layer, an electrode element layer, and an electrolyte from above, and the shield layer is disposed so as to cover the electrode element layer. A part of the overlapping part of the shield layer and the electrode element layer is exposed and constitutes a sandwiching part sandwiched by the sandwiching clip,
The body of the sandwiching clip is formed of an insulator, and includes an upper structure and a lower structure that are relatively movable, and the lower structure is configured such that the electrode is disposed when the sandwiching clip is sandwiched between the sandwiching portions. A signal line terminal contacting the element layer; and a signal line connected to the signal line terminal and disposed inside the lower structure, wherein the upper structure sandwiches the sandwiching clip with the sandwiching portion. Sometimes with a shield terminal arranged to contact the shield layer;
A connection structure characterized in that the clamping clip is clamped by the clamping part of the biological electrode, and the biological signal line and the shield terminal are led out to an external measuring device. The connection structure according to claim 1, wherein the shield terminal of the upper structure is disposed so as to cover the signal line terminal and the signal line of the lower structure. The lower structure of the clip body is provided with a contact that contacts the shield terminal, the contact is connected to a braid of a shield wire, the signal line is connected to a core wire of the shield wire, and the shield wire is externally connected. The connection structure according to claim 1, wherein the connection structure is led out to a measuring device. The shield terminal of the upper structure of the clip body is connected to a braid of a shield wire, the signal wire is connected to a core wire of the shield wire, and the shield wire is led to an external measuring device. Item 3. The connection structure according to Item 1 or 2. The connection structure according to any one of claims 1 to 4, wherein the upper structure and the lower structure of the main body of the holding clip are coupled to each other via a fulcrum so as to be relatively rotatable. The connection structure according to any one of claims 1 to 4, wherein the upper structure and the lower structure of the main body of the holding clip are coupled so as to be relatively horizontally movable. A bioelectrode used in the connection structure according to any one of claims 1 to 6,
The bioelectrode is formed of a soft material and has a multi-layer configuration of a first insulating layer, a shield layer, a second insulating layer, an electrode element layer, and an electrolyte from above,
The bioelectrode according to claim 1, wherein the insulating layer on the upper portion of the portion of the shield layer sandwiched by the sandwiching clip is removed. A bioelectrode used in the connection structure according to any one of claims 1 to 6,
The bioelectrode is formed of a soft material, and includes a first portion including a first insulating layer, a shield layer, and an adhesive layer from above, and a second portion including a second insulating layer, an electrode element layer, and an electrolyte. Divided into parts,
The bioelectrode according to claim 1, wherein the insulating layer on the upper portion of the portion of the shield layer sandwiched by the sandwiching clip is removed.

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