JPH03963Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a biological electrode for extracting electrical signals generated from a living body.

<Conventional technology> Conventionally, electrodes have been attached to the surface of a subject's body as biological electrodes for measuring cardiac action currents and action potentials.
Various fixable structures have been developed, and measures such as interposing a conductive cream or paste between the electrode and the body surface have been taken to improve adhesion.

On the other hand, from the viewpoint of ease of attachment of biological electrodes, a substantially circular one-touch type as shown in FIG. 4 has been developed. This electrode consists of a conductive electrode piece 1' made of metal foil with a conductive adhesive material layer 2' having adhesive properties on one side, and a tongue piece part 1'' for connection with a biomedical diagnostic device. is made to protrude from the end of the conductive electrode piece 1'.
The use of this electrode is superior to the use of the conductive cream or paste in terms of ease of attachment and non-contamination of the skin surface.

<Problems to be solved by the invention> However, conductive creams and pastes have various problems such as complicated application operations, poor adhesion during sweating, and contamination of the skin surface.

In addition, since the biomedical electrode shown in FIG. 4 has a tongue portion 1'' that protrudes outside the conductive electrode piece 1', a lead wire such as a clip for connecting to a biomedical diagnostic device is required. When the terminal is connected to the tongue portion 1″, stress acts on the tongue portion 1″, and the applied stress is
Acting on the proximal end of the conductive adhesive material layer 2', the electrode is lifted by the terminal, and wall opening stress is created between the skin surface and the conductive adhesive material layer 2' after connection. This may cause the conductive adhesive material layer 2' to lift up and peel off from the tongue portion 1'' side, causing instability of electrical signals due to poor adhesion.Especially when used for long periods of time, such as for monitoring purposes. In this case, such a phenomenon is noticeable.

Furthermore, the conductive electrode pieces that make up these electrodes generally use silver/silver chloride as a nonpolarizable material, or expensive metal foils such as nickel, tin, or chromium. In order to reduce manufacturing costs, which is an important factor for disposable electrodes, providing a tongue protruding from the end of the electrode piece is not satisfactory in terms of manufacturing complexity and yield. It is.

<Means for solving the problems> The present invention was devised to solve the above problems, and by providing a structure in which the electrode tongue piece is provided by forming a cut inside the electrode piece. It can be easily attached to the subject's body surface, and it is possible to connect lead wire terminals for connection to biomedical diagnostic equipment without compromising adhesion, and it can be used stably for a long time as a monitoring electrode. An object of the present invention is to provide a biological electrode that can be used and manufactured at low cost.

That is, the present invention consists of a flexible electrode piece that follows the skin surface and a conductive adhesive material layer that fixes the electrode piece on the skin surface and transmits electrical signals from the living body to the electrode piece. is essentially formed in the peripheral portion of the electrode piece, and in the non-formed part of the material layer, a conductive tongue piece for connecting a terminal for extracting an electrical signal from a living body to a biomedical diagnostic device is formed by a cut. This invention relates to a biological electrode provided within the electrode piece terminal.

Hereinafter, the biological electrode of the present invention will be specifically explained using the drawings.

FIG. 1 is a perspective view showing one embodiment of the biomedical electrode of the present invention, in which a flexible electrode piece 1 that follows the skin surface and a conductive adhesive material layer 2 on the peripheral part (opposing area) are shown.
The material layer 2 has a conductive tongue piece 4 connectable to a biomedical diagnostic device in the non-forming part A.
Two cuts 3 extending from one side of the electrode are formed inside the electrode piece. The conductive tongue piece 4 provided by the cut 3 is used by being made to stand up from the cut 3 after the biological electrode of the present invention is applied to the skin surface.

FIG. 2 is a perspective view of another example of a biomedical electrode, in which a conductive adhesive material layer 2 is provided over the entire peripheral portion of a flexible electrode piece 1, and a non-forming portion A in the center is provided with a conductive adhesive material layer 2 for use in a biomedical diagnostic device. A connectable conductive tongue piece 4 is formed by a substantially U-shaped cut 3.

FIG. 3 is a plan view of another example of the biological electrode of the present invention, in which chevron-shaped cuts 3 are provided in the non-formed portion A provided in the same manner as in FIG. Since the conductive tongue piece 4 can be made upright and stacked in two layers, the lead wire terminal for taking out the obtained electric signal to the biomedical diagnostic device will not fall off.
It can be connected securely.

The electrode piece 1 serves as a medium for guiding electrical signals extracted from the skin surface to a biomedical diagnostic device via the conductive adhesive material layer 2, and is made of metal such as copper, tin, nickel, or aluminum. Examples include sheet-like materials, or electrically conductive sheet-like materials such as plastic films, paper, woven fabrics, and non-woven fabrics on which metal thin film layers are provided by means such as electroless plating, vacuum evaporation, or lamination. Select and use a material that is flexible enough to follow the movements of the skin surface. Furthermore, by providing an electrically insulating layer on the opposite surface of the electrode piece 1 from the conductive adhesive material layer 2 to form a stacked structure of a conductive layer and an electrically insulating layer, the biological surface of the biological electrode of the present invention can be improved. It can be applied and installed to prevent noise caused by contact when extracting electrical signals.

The conductive adhesive material layer 2 provided around the electrode piece is a flexible layer for attaching and fixing the biological electrode of the present invention on the skin surface and guiding the extracted electrical signal to the biomedical diagnostic device. It consists of layers and is made of a conductive material. These substances include, for example, polysaccharides such as karaya gum, natural polymers such as natural rubber, semi-synthetic polymers such as various celluloses, polyacrylic acid (or its salts), polyacrylic acid ester derivatives, Synthetic polymeric substances such as homopolymers or copolymers of polyvinyl alcohol can be used, but conductive substances such as various metal powders, carbon, and water may be added to improve the conductivity of the polymeric substance. You can. Further, the electrically conductive substance can also be used in combination with a known material that does not substantially have electrical conductivity.

The conductive adhesive material layer 2 made of the polymeric substance can be provided as is around the electrode piece 1, but it also strengthens the shape retention of the layer and prevents contamination such as adhesive residue on the skin surface. In order to do this, a reinforcing sheet that does not inhibit the conductivity of the layer can be interposed. Examples of these reinforcing sheets include paper, woven fabrics, non-woven fabrics, various plastic films, and metal foils, but when using non-conductive materials, provide through holes in the reinforcing sheets to ensure conduction. and use it.

<Effects of the Invention> As described above, the biomedical electrode of the present invention has a conductive tongue for connecting to a biomedical diagnostic device inside the electrode through a cut, thereby forming a lead wire terminal for connection. When attaching the electrode, the connection operation is much easier than with conventional biological electrodes that have external tongues (see Figure 4), and the conductive adhesive material layer does not lift up from the adhesive end surface of the biological surface after connection. Furthermore, since the weight load after connecting the lead wire terminal is applied to the entire biomedical electrode, it is possible to improve poor adhesion due to local loads and the instability of electrical signals associated therewith.

Furthermore, as is clear from each figure, the biological electrode of the present invention has a conductive tongue piece for connection in the internal area of the electrode piece, so there is no waste of expensive electrode piece material, and it can be packaged compactly. It has the feature of being able to reduce bulk during storage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the biological electrode of the present invention.
FIG. 2 is a perspective view of another biological electrode, FIG. 3 is a plan view of another biological electrode, and FIG. 4 is a perspective view of a conventional biological electrode. 1... Electrode piece, 2... Conductive adhesive material layer, 3...
... Cut, 4... Conductive tongue piece, A... Part where conductive material is not formed.

Claims (1)

[Claims for Utility Model Registration] (1) A flexible electrode piece that follows the skin surface, and a conductive adhesive material layer that fixes the electrode piece on the skin surface and transmits electrical signals from a living body to the electrode piece. The material layer is essentially formed on the peripheral portion of the electrode piece, and the non-forming portion of the material layer has a conductive layer for connecting a terminal for extracting electrical signals from a living body to a biomedical diagnostic device. A living body electrode, wherein a tongue piece is provided within the electrode piece terminal by a cut. (2) The living body electrode according to claim 1, wherein the electrode piece is made of a laminate of a conductive layer and an electrically insulating layer, and a conductive material layer is provided on the conductive layer side.