JP2019072171A - Bioelectrode sheet - Google Patents

Abstract

To inhibit an electrode mounted on a living body surface from coming off even when a wearer moves, and adjust an interval between two electrodes arbitrarily while reducing the possibility of a support medium fracturing.SOLUTION: A bioelectrode sheet includes two electrodes 20a and 20b provided to one surface of a base material 10, electrolyte layers 40a and 40b that are laminated on the base material 10, covering the electrodes 20a and 20b individually, and two connection terminals 31a and 31b provided on the other surface of the base material 10, which are connected to the electrodes 20a and 20b respectively. The base material 10 includes, between the electrodes 20a and 20b, a plurality of grooves 11 that extend in parallel to one another in a direction intersecting with a direction that the electrodes 20a and 20b are opposed to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bioelectrode sheet for acquiring a biosignal.

  2. Description of the Related Art Conventionally, in order to transmit an electrical signal from a living body to a measurement device, an electrode pad adhered and fixed to the skin surface of the living body is used. In the electrocardiogram application and the like, a method of connecting an electrode provided on a support and a connection terminal electrically connected to the electrode to an external measuring device is generally used. Such a biomedical electrode pad is configured such that the electrode is provided on one side of the support and the electrode is covered with an electrolyte to realize an electrical connection between the electrode and the living body. ing.

  When two electrodes are attached to the surface of the living body with an adhesive or the like, in many situations, two electrodes are attached to the surface of the living body at regular intervals, but if there is trauma at the attachment site or the physical size of the wearer It is desirable to adjust the distance between the two electrodes, depending on what kind of electrical signal is to be obtained. Further, even when the wearer moves, it is necessary to prevent the electrode attached to the surface of the living body from falling off.

  Here, a stretchable sheet is used as a support for the electrode, and the lead wire electrically connected to the electrode is made to extend and contract by meandering, whereby the electrode is a living body by the operation of the wearer. The electrode pad which suppressed falling off from the surface is considered, and it is disclosed by patent document 1. FIG.

  Moreover, a plurality of perforations are provided between the two electrodes of the support, and by cutting the perforations, the area between the perforations is made a connection part, whereby the distance between the two electrodes can be adjusted. A pad is considered, and Patent Document 2 is disclosed.

Patent No. 3923861 Patent No. 6181356 gazette

  However, in the case of using a stretchable sheet as a support of an electrode as disclosed in Patent Document 1, there is a possibility that the support is physically fragile in a stretched state and broken. At the same time, when the support is stretched, it can not withstand the pulling force and may break. In addition, if the support is repeatedly stretched and shrunk, the recovery may decline.

  Further, as disclosed in Patent Document 2, in the case where a perforation is provided between the two electrodes of the support and the perforation is made a junction by cutting the perforation, the junction is If it is thin, it may be physically fragile.

  The present invention has been made in view of the problems of the above-described conventional techniques, and is applied to the surface of the living body even when the wearer moves while reducing the possibility of breakage of the support. An object of the present invention is to provide a sheet for biological electrodes, in which the electrodes are not easily detached and the distance between the two electrodes can be arbitrarily adjusted.

In order to achieve the above object, the present invention is
A sheet-like support,
Two electrodes provided on one side of the support;
An electrolyte layer laminated on the support, covering the two electrodes individually;
The other surface of the support has two connection terminals provided respectively connected to the two electrodes,
The support has a plurality of grooves extending parallel to each other in a direction crossing the direction in which the two electrodes face each other between the two electrodes.

  In the present invention configured as described above, the support is folded in a mountain and valley folds with the plurality of grooves provided between the two electrodes of the support as folding portions, whereby the two electrodes face each other. The electrode attached to the surface of the living body is unlikely to come off even when the wearer moves, and the distance between the two electrodes can be arbitrarily adjusted. At this time, since the support is expanded and contracted only by mountain-folding and valley-folding the support, no brittle portion is formed in the support, and the possibility of breakage is reduced.

  According to the present invention, the support is stretchable in the direction in which the two electrodes face each other by mountain-folding and valley-folding the support using a plurality of grooves provided between the two electrodes of the support as folds. Therefore, while reducing the possibility of breakage of the support, it is difficult for the electrode attached to the surface of the living body to come off even when the wearer moves, and the distance between the two electrodes can be arbitrarily adjusted. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the sheet | seat for bioelectrodes of this invention, (a) is a surface figure, (b) is an AA 'sectional view shown to (a), (c) is a back view. (D) is an enlarged view of part B shown in (b). It is a figure for demonstrating the manufacturing method of the sheet | seat for biological electrodes shown in FIG. It is a figure for demonstrating the effect | action of the sheet | seat for biological electrodes shown in FIG. It is an enlarged view of the groove vicinity in the state which bent the sheet | seat for bioelectrodes shown in FIG. 1 as a fold part. It is a figure which shows 2nd Embodiment of the sheet | seat for bioelectrodes of this invention, (a) is a surface figure, (b) is an AA 'sectional view shown to (a), (c) is a back view It is. It is a figure for demonstrating the usage method of the sheet | seat for biological electrodes shown in FIG. It is a figure which shows 3rd Embodiment of the sheet | seat for bioelectrodes of this invention, (a) is a surface figure, (b) is an AA 'sectional view shown to (a), (c) is a back view It is. It is a figure which shows 4th Embodiment of the sheet | seat for bioelectrodes of this invention, (a) is a surface figure, (b) is an AA 'sectional view shown to (a), (c) is a back view It is. It is a figure which shows other embodiment of the groove provided in the sheet | seat for bioelectrodes of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First Embodiment
FIG. 1 is a view showing a first embodiment of the bioelectrode sheet of the present invention, where (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), (c Is a reverse view, and (d) is an enlarged view of a portion B shown in (b).

  As shown in FIG. 1, the present embodiment is a bioelectrode sheet 1 having a base material 10, two electrodes 20a and 20b, connection terminals 31a, 31b, 32a and 32b, and electrolyte layers 40a and 40b. .

  The base substrate 10 is to be a support in the present invention. The base substrate 10 is a sheet made of a resin material such as track-shaped polyethylene naphthalate, polyethylene terephthalate, or polyamide having a longitudinal direction. The base material 10 is not limited to the above-described material as long as it is an insulator material having a tensile strength not to be easily cut. The thickness of the base substrate 10 is not particularly limited, but is preferably 1 mm or less, more preferably 0.5 mm or less, and further preferably 0.2 mm or less.

  The electrodes 20a and 20b are made of Ag, AgCl, or the like, and are fixed in contact with the skin surface of the living body to obtain an electrical signal from the living body, and are provided on one side of the base substrate 10. In the vicinity of the end in the longitudinal direction, they are provided to face each other in the longitudinal direction.

  The connection terminals 32a and 32b are provided corresponding to the electrodes 20a and 20b in the vicinity of the center of the base material 10 in the longitudinal direction on the surface on which the electrodes 20a and 20b of the base material 10 are provided. The connection terminals 32a and 32b are electrically connected to the electrodes 20a and 20b through the wirings 34a and 34b formed on the base member 10, respectively.

  The connection terminals 31a and 31b are provided to face the connection terminals 32a and 32b, respectively, on the surface of the base member 10 opposite to the electrodes 20a and 20b. The connection terminals 32a and 32b are electrically connected to the connection terminals 31a and 31b through through holes 33a and 33b formed in the base substrate 10, respectively.

  The insulating layer 50 is laminated on the surface of the base substrate 10 on which the electrodes 20a and 20b are provided, with the connection terminals 32a and 32b and the wires 34a and 34b being covered, for example, by applying an insulating tape. Moreover, the electrodes 20a and 20b are individually covered, and electrolyte layers 40a and 40b made of an electrolyte gel are stacked. Further, the adhesive layer 60 is laminated by applying an adhesive to a region which does not overlap with the electrolyte layers 40a and 40b and does not face the groove 11 described later.

  On the surface of the base substrate 10 opposite to the electrodes 20a and 20b, a plurality of grooves 11 each having a trapezoidal cross section are formed between the electrodes 20a and 20b. The plurality of grooves 11 is a base in a direction crossing the direction in which the electrodes 20a and 20b face each other in the regions between the electrode 20a and the connection terminals 31a and 32a and between the electrode 20b and the connection terminals 31b and 32b. It extends parallel to each other from the end of the substrate 10 to the opposite end. The plurality of grooves 11 extend in parallel with each other, but the angles formed by each other may be parallel or may have a slight inclination with each other. In FIG. 1A, the groove 11 is shown by a broken line, but the groove 11 may be formed continuously from the end side of the base material 10 to the opposite end side, May be formed. Although the thickness of the groove 11 depends on the thickness of the base substrate 10, it is preferably 0.5 mm or more, more preferably 0.3 mm or more, and still more preferably 0.1 mm or less. Although the width of the groove 11 depends on the thickness of the base substrate 10, it is preferably 1 to 2 mm when the thickness of the base substrate 10 is 0.2 mm as described above. Although the groove 11 does not extend from the edge of the base 10 to the opposite edge, the groove 11 extends from the vicinity of the edge of the base 10 to the proximity of the opposite edge. The groove 11 may not be formed in the region near the edge of the base material 10.

  Below, the manufacturing method of the sheet | seat 1 for biological electrodes comprised as mentioned above is demonstrated.

  FIG. 2 is a figure for demonstrating the manufacturing method of the sheet | seat 1 for biological electrodes shown in FIG.

  When manufacturing the sheet | seat 1 for biological electrodes shown in FIG. 1, the some groove | channel 11 is first formed in one side of the base material 10 (FIG. 2 (a)). The grooves 11 may be formed by cutting using a laser or a blade, or by debossing by pressing.

  Next, the wirings 34a and 34b are formed on the surface of the base substrate 10 opposite to the grooves 11 by printing using a conductive ink (FIG. 2B). Since the wires 34a and 34b are for connecting the electrodes 20a and 20b provided on the base substrate 10 and the connection terminals 32a and 32b, respectively, the electrodes 20a and the connection terminals 31a and 32a, and the electrodes The grooves 11 formed in the respective regions between 20b and the connection terminals 31b and 32b are opposed to each other.

  Next, on the surface of the base substrate 10 on which the wires 34a and 34b are formed, the electrodes 20a are connected to the ends of the wires 34a and 34b at both ends of the base substrate 10 in the longitudinal direction. , 20b (Fig. 2 (c)).

  Next, on the surface of the base material 10 on which the wires 34a and 34b are formed, connection terminals 32a and 32b are formed at the end of the wires 34a and 34b opposite to the electrodes 20a and 20b. The through holes 33a and 33b are formed opposite to the connection terminals 32a and 32b, and the connection terminals 31a and 31b are opposed to the connection terminals 32a and 32b on the surface of the base material 10 on which the grooves 11 are formed. It forms (FIG.2 (d)). Thus, the electrodes 20a and 20b provided on one surface of the base substrate 10 and the connection terminals 31a and 31b provided on the other surface of the base substrate 10 respectively have the wires 34a and 34b and the connection terminal 32a. , 32b and the through holes 33a, 33b are electrically connected.

  Next, the insulating layer 50 is stacked by covering the connection terminals 32a and 32b and the wires 34a and 34b, for example, by applying an insulating tape to the surface of the base substrate 10 on which the electrodes 20a and 20b are provided (FIG. 2) (E)).

  Thereafter, the electrodes 20a and 20b are individually covered on the surface of the base substrate 10 on which the electrodes 20a and 20b are provided, and the electrolyte layers 40a and 40b are laminated, and do not overlap with the electrolyte layers 40a and 40b. The adhesive layer 60 is laminated by applying an adhesive to a region not facing 11 and the bioelectrode sheet 1 shown in FIG. 1 is completed (FIG. 2 (f)).

  The bioelectrode sheet 1 manufactured as described above is mounted on a living body by the adhesive layer 60 with the surface provided with the electrodes 20a and 20b as a mounting surface, and the measurement device is connected to the connection terminals 31a and 31b. Thus, the electrical signals from the living body are acquired by the electrodes 20a and 20b, and the acquired electrical signals are transmitted from the connection terminals 31a and 31b to the measuring device. At this time, the wires 34a and 34b connected to the electrodes 20a and 20b and the connection terminals 32a and 32b are formed on the surface on which the electrodes 20a and 20b are provided. The wires 34a and 34b and the connection terminals 32a and 32b are provided. Since 32 b is covered by the insulating layer 50, contact with a living body is avoided. In the case where the electrolyte layers 40a and 40b play the role of the adhesive layer, it is not necessary to provide the adhesive layer 60.

  Below, the effect | action of the sheet | seat 1 for biological electrodes mentioned above is demonstrated.

  FIG. 3 is a figure for demonstrating an effect | action of the sheet | seat 1 for biological electrodes shown in FIG. 1, and shows the cross section of the sheet | seat 1 for biological electrodes. In order to make the function of the bioelectrode sheet 1 easy to understand, the wirings 34a and 34, the insulating layer 50 and the adhesive layer 60 are not shown. FIG. 4 is an enlarged view of the vicinity of the groove 11 in a state in which the sheet for biological electrodes 1 shown in FIG. 1 is bent with the groove 11 as a fold.

  As described above, in the bioelectrode sheet 1 shown in FIG. 1, in one surface of the base substrate 10, in a direction crossing the direction in which the electrodes 20a and 20b face each other between the two electrodes 20a and 20b. A plurality of grooves 11 extending parallel to one another are formed. Therefore, as shown in FIG. 3 (b), the base substrate 10 is alternately folded with the mountain folds 12 and the valley folds 13 with the groove 11 as the folded portion, as shown in FIG. 3 (a). The distance between the electrodes 20a and 20b can be narrowed with respect to the state where 10 is extended. At this time, since the groove 11 to be the folded portion has a constant width because the cross section thereof is trapezoidal, as shown in FIG. 4A, the groove 11 is formed with the groove 11 as the folded portion. As shown in FIG. 4 (b), not only the mountain fold 13 whose outer surface is on the outer side, but also the valley fold 12 whose surface on which the groove 11 is formed with the groove 11 as the fold is inside. Can.

  As described above, in the bioelectrode sheet 1 shown in FIG. 1, the base substrate 10 is mountain-folded and valley-folded with the plurality of grooves 11 provided between the two electrodes 20a and 20b of the base substrate 10 as folding portions. By folding, the base substrate 10 can expand and contract in the direction in which the two electrodes 20a and 20b face each other, whereby a load is applied to the base substrate 10 even when the wearer wearing the bioelectrode sheet 1 moves. The electrodes 20a and 20b attached to the surface of the living body are unlikely to come off, and the distance between the two electrodes 20a and 20b can be arbitrarily adjusted. At that time, since the base substrate 10 is expanded and contracted only by mountain-folding and valley-folding the base substrate 10, no fragile portion occurs in the base substrate 10, and the possibility of breakage is reduced. . In addition, since the connection terminals 31a and 31b for connecting the external measurement device are formed on the same base substrate 10 as the electrodes 20a and 20b, no fragile portion exists. It is avoided that material 10 grade breaks.

  In addition, in the sheet | seat 1 for biological electrodes of this form, the groove | channel 11 is formed in the surface on the opposite side to electrode 20a, 20b of the base material 10. As shown in FIG. This is because the wires 34a and 34b are formed on the surface of the base material 10 on which the electrodes 20a and 20b are provided in order to connect the electrodes 20a and 20b and the connection terminals 32a and 32b. When the groove 11 is formed between 20b and the connection terminals 32a and 32b, it becomes difficult to form the wires 34a and 34b by printing or the like.

Second Embodiment
FIG. 5 is a view showing a second embodiment of the bioelectrode sheet of the present invention, wherein (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), (c ) Is a reverse view.

  In this embodiment, as shown in FIG. 5, a groove 11 is formed between two connection terminals 31a and 31b on the surface of the base substrate 10 opposite to the electrodes 20a and 20b as compared with the one shown in FIG. The bioelectrode sheet 101 differs in that the adhesive layer 60 is not laminated on the surface of the base substrate 10 opposite to the electrodes 20a and 20b.

  FIG. 6 is a figure for demonstrating the usage method of the sheet | seat 101 for biological electrodes shown in FIG.

  In the sheet 101 for biological electrodes in the present embodiment, as described above, the adhesive layer 60 like the sheet 1 for biological electrodes shown in FIG. 1 does not exist. Therefore, as shown in FIG. 6, a part of the bioelectrode sheet 101 is covered by the cover seal 2 in which the adhesive layer is laminated on the back surface of the sheet, and is mounted on the living body. As described above, when the electrolyte layers 40a and 40b play the role of the adhesive layer, the cover seal 2 is not necessary. Thus, in the bioelectrode sheet 101 mounted on a living body, two electrodes are formed by mountain-folding and valley-folding the base material 10 with the groove portion 11 as a folding portion as in the case shown in FIG. The interval between 20a and 20b can be adjusted arbitrarily.

Third Embodiment
FIG. 7 is a view showing a third embodiment of the bioelectrode sheet of the present invention, where (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), (c ) Is a reverse view.

  This embodiment is different from that shown in FIG. 5 as shown in FIG. 7 in the sheet 201 for a bioelectrode which is different in that the groove 11 is formed on the surface on which the electrodes 20a and 20b of the base substrate 10 are provided. It is.

  In the bioelectrode sheet 101 shown in FIG. 5, since the groove 11 is formed between the two connection terminals 31a and 31b as described above, the electrodes 20a and 20b are connected to the connection terminals 32a and 32b, respectively. The groove 11 is not formed in the region opposed to the interconnections 34a and 34b. Therefore, the grooves 11 do not affect the formation of the wirings 34a and 34b, and as shown in FIG. 7, the grooves 11 can be formed on the surface of the base material 10 on which the electrodes 20a and 20b are provided. .

  Also in the bioelectrode sheet 201 configured as described above, the cover seal 2 is used or the electrolyte layer 40a or 40b is attached to the living body as in the case shown in FIG. By mountain-folding and valley-folding the base 10 with the groove 11 as a fold, the distance between the two electrodes 20a and 20b can be arbitrarily adjusted.

Fourth Embodiment
FIG. 8 is a view showing a fourth embodiment of the bioelectrode sheet of the present invention, wherein (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), (c ) Is a reverse view.

  In this embodiment, as shown in FIG. 8, the electrodes 20a and 20b and the connection terminals 31a and 31b are provided opposite to each other through the base material 10, as compared with the one shown in FIG. And the connection terminals 31a and 31b are directly connected to each other through the through holes 33a and 33b formed in the base substrate 10, respectively. And since wiring 34a, 34b for respectively connecting electrode 20a, 20b and connection terminal 32a, 32b is not formed, the groove | channel 11 is the front and back of the base material 10 between two electrodes 20a and 20b. Are respectively formed.

  Also in the bioelectrode sheet 201 configured as described above, the cover seal 2 is used or the electrolyte layer 40a or 40b is attached to the living body as in the case shown in FIG. By mountain-folding and valley-folding the base 10 with the groove 11 as a fold, the distance between the two electrodes 20a and 20b can be arbitrarily adjusted.

  If the position of the groove 11 formed in the base material 10 is between the two electrodes 20a and 20b, the combination shown in the above embodiment is combined as long as there is no hindrance to the formation of the wires 34a and 34b. May be

(Other embodiments)
FIG. 9 is a view showing another embodiment of the groove provided in the bioelectrode sheet of the present invention, and shows a cross section of a region corresponding to the region shown in the cross section shown in FIG. .

  The grooves provided in the bioelectrode sheet of the present invention are not limited to those having a trapezoidal cross section as shown in FIG. 1, and the grooves 411 having a triangular cross section as shown in FIG. 9 (a). Alternatively, as shown in FIG. 9B, it may be a groove 511 whose cross section is rectangular. It is also conceivable to form the groove by forming a slit from one surface of the base substrate 10. In that case, since the groove formed by the slits has little influence on the formation of the wiring, it can be formed on any surface of the base material 10 regardless of the region where the wiring is formed, but the base material Depending on the material of 10, it may be difficult to bend so that the surface on which the groove is formed is inside. In such a case, it is necessary to alternately form grooves formed of slits on both sides of the base substrate 10.

1, 101, 201, 301 Sheet for biological electrode 2 Cover seal 10 Base material 11, 411, 511 Groove 12 Valley fold 13 Mountain fold 20a, 20b Electrode 31a, 31b, 32a, 32b Connection terminal 33a, 33b Through hole 34a, 34b Wiring 40a, 40b Electrolyte layer 50 Insulating layer 60 Adhesive layer

Claims (1)

A sheet-like support,
Two electrodes provided on one side of the support;
An electrolyte layer laminated on the support, covering the two electrodes individually;
The other surface of the support has two connection terminals provided respectively connected to the two electrodes,
The sheet for bioelectrodes, wherein the support has a plurality of grooves extending parallel to each other in a direction crossing the direction in which the two electrodes face each other between the two electrodes.

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