JP3893561B2 - Biological electrode - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a biological electrode used in contact with a living body, which is used by being connected to a main body device such as an electrocardiograph or a low-frequency treatment machine.
[0002]
[Prior art]
A living body terminal electrode disclosed in Japanese Patent Application Laid-Open No. 9-98954 has a magnet disposed on either a base portion adhered to a living body or a terminal portion of a measurement end, and the base portion and the terminal portion are separated by the suction force. The base portion is composed of a base sheet, an electrode portion fixed to the base sheet, and an adhesive sheet. The electrode portion forms an electrode on one side of the insulating sheet, and the other side. It has a metal magnetic piece between them.
[0003]
[Problems to be solved by the invention]
However, the biological terminal electrode of the above-mentioned reference has a problem that the structure of the base body itself having the electrode is complicated and cannot be easily replaced when the conductive ability of the electrode is lowered. In addition, when the electrode itself is dropped, there is a problem that measurement is impossible.
[0004]
For this reason, the present invention provides a living body electrode having a structure in which living body information can be detected even if an electrode in contact with a living body can be easily replaced and there is no electrode in contact with the living body in the unlikely event. There is to do.
[0005]
[Means for Solving the Problems]
Therefore, the biological electrode according to the present invention is a biological electrode that is used in contact with a living body, and is connected to the main body device via an electric wire, and has a substantially flat plate-shaped main body portion and a substantially central portion of the main body portion. A metal electrode part constituted by a recessed part formed on the peripheral part of the concave part, a protruding electrode part formed in a predetermined range on the periphery of the concave part, and a biological contact electrode part detachably attached to the concave part There is. Further, the protruding electrode may be constituted by a protruding portion protruding at a predetermined position of the main body portion.
[0006]
Furthermore, the biocontact electrode portion includes a core portion made of a nonwoven fabric, a soft polyurethane resin layer impregnated and held in the core portion and containing a conductive material powder, and a conductive sheet disposed on the side surface of the biocontact side. And an adhesive portion for the concave portion disposed on a side surface facing the conductive sheet. The conductive sheet is preferably made of conductive urethane. The conductive material powder is preferably silver chloride powder.
[0007]
Further, the adhesive portion may be formed of a ferromagnetic metal, and a permanent magnet may be fixed to the concave portion.
[0008]
Furthermore, it is preferable that the adhesive portion is subjected to silver plating.
[0009]
Moreover, the said adhesion part may be formed with an electroconductive adhesive material.
[0010]
Furthermore, it is preferable that a groove portion communicating with the concave portion is formed in the main body portion of the metal electrode portion in order to facilitate attachment / detachment of the biological contact electrode portion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
As shown in FIG. 1, a biological electrode 1 according to the present invention includes a main body device (not shown) and a metal electrode part 3 connected via an electric wire 2 and a biological contact electrode part 4 that comes into contact with a living body (not shown). Is done.
[0013]
For example, as shown in FIGS. 2 and 3, the metal electrode portion 3 includes a flat plate-like main body portion 31, a concave portion 32 formed substantially at the center, and a permanent magnet 34 fixed in the concave portion 32, It is comprised by the protruding electrode part 33 formed in the periphery of the said recessed part 32 in the predetermined range. In this embodiment, a cut portion 35 is formed between the pair of protruding electrode portions 33 in order to attach and detach the living body contact electrode portion 4 described below. Further, the protruding electrode part 33 may be constituted by a protruding part protruding at a predetermined position of the main body part 31.
[0014]
The biological contact electrode part 4 is arranged on a core part 41 made of nonwoven fabric, a conductive soft polyurethane resin layer 42 impregnated and held in the core part 41, and a side surface of the soft polyurethane resin layer 42 on the ecological contact side. The conductive sheet 43 and the adhesive portion 44 to the concave portion 32 disposed on the side surface facing the conductive sheet 44 are configured. In this embodiment, the bonding portion 44 is made of a ferromagnetic metal such as stainless steel, and the surface thereof is silver-plated.
[0015]
Usually, the flexible polyurethane resin layer 42 is effective for ensuring the contact area by matching the contact portion of the electrode with the shape and unevenness of the living body, but it tends to spread unnecessarily. Used to hold the soft polyurethane resin. The soft polyurethane resin layer 42 is mixed with a conductive material powder, such as silver chloride powder, in order to provide conductivity.
[0016]
In addition, the conductive sheet 43 is not provided so as to be in close contact with the living body by the adhesive force of this surface as in the prior art, but the adhesive force is made as weak as possible so as not to leave an excessive chemical substance in the living body. It is provided to do. For this reason, when appropriate, for example, a method of pressing with a hand or fixing with a band may be necessary, but this can prevent the covering caused by the electrodes.
[0017]
The living body electrode 1 can be configured by mounting the living body contact electrode portion 4 having the above configuration in the concave portion 32 of the metal electrode portion 3. Moreover, since the said biocontact electrode part 4 is cheap compared with the conventional electrode and mass production is possible, when the contact property or detectability of the biocontact electrode part 4 falls, it can replace | exchange easily. Therefore, the contactability and detectability can be maintained high, and the life of the living body electrode itself can be extended.
[0018]
Moreover, in the said structure, even when the biological contact electrode part 4 is lost, there exists an advantage that a certain amount of biological electrode can be measured with the protruding electrode part 33 and the main-body part 31. FIG.
[0019]
The biomedical electrode 1 according to the second embodiment shown in FIGS. 5 and 6 is obtained by further improving the structure of the cut portion 31 and extends outward from the cut portion 31 in the radial direction. A groove 50 is formed. As a result, the biological contact electrode unit 4 can be attached and detached more easily. In the second embodiment, the same portions as those of the first embodiment described above or portions having the same effects are denoted by the same reference numerals, and the description thereof is omitted.
[0020]
【The invention's effect】
As described above, according to the present invention, since the living body contact electrode portion is detachable and has a structure that can be detected only by the metal electrode portion, there is no worry in the unlikely event, Since the contact electrode part can be exchanged, it can be hygienic, and the detection system can be maintained for a long time.
[0021]
Furthermore, by using the conductive sheet, it is possible to prevent an excess chemical substance from remaining in the living body, so that there is an effect that the covering is less than that of the conventional electrode.
[0022]
In addition, since the conventional electrode contains a large amount of moisture, there are problems such as deterioration of conductivity and reduction of tackiness due to evaporation of moisture. However, the biomedical electrode according to the present invention contains moisture. Therefore, it can be used for a long time.
[0023]
In addition, since the soft resin is used and the traceability of the skin irregularities on the surface of the living body is improved, the electrical resistance does not change with respect to vibration during measurement (hand tremor, vibration, body movement). A good electrocardiogram waveform can be obtained.
[0024]
In addition, the biomedical electrode according to the present invention has a feature that, in the unlikely event, only the metal electrode portion can play a role to some extent.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a biomedical electrode according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the metal electrode portion of the biomedical electrode according to the first embodiment of the present invention.
FIG. 3 is a plan view of the metal electrode portion of the biomedical electrode according to the first embodiment of the present invention.
FIG. 4 is a cross-sectional view of a biological contact electrode portion of the biological electrode according to the first embodiment of the present invention.
FIG. 5 is a cross-sectional view of a biological electrode according to a second embodiment of the present invention.
FIG. 6 is a plan view of a biological electrode according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Biological electrode 2 Electric wire 3 Metal electrode part 4 Biological contact electrode part 31 Main body part 32 Control part 33 Protruding electrode part 34 Permanent magnet 35 Notch part 41 Core part 42 Soft polyurethane resin layer 43 Conductive sheet 44 Adhesive part 50 Groove part

Claims (7)

In a biomedical electrode used in contact with a living body,
The main body device is connected to the main body via an electric wire, and includes a substantially flat plate-shaped main body portion, a concave portion formed substantially at the center of the main body portion, and a protruding electrode portion formed in a predetermined range on the periphery of the concave portion. A metal electrode part configured;
A living body electrode comprising: a living body contact electrode portion detachably attached to the recess. The bio-contact electrode part is composed of a non-woven core, a soft polyurethane resin layer impregnated and held in the core and containing conductive material powder, a conductive sheet disposed on the bio-contact side surface, The living body electrode according to claim 1, wherein the living body electrode includes an adhesive portion with respect to the concave portion disposed on a side surface facing the conductive sheet. The biological electrode according to claim 2, wherein the conductive sheet is made of conductive urethane. The living body electrode according to claim 2 or 3, wherein the adhesion portion is formed of a ferromagnetic metal, and a permanent magnet is fixed to the recess. The biomedical electrode according to claim 4, wherein the adhesive portion is subjected to silver plating. The living body electrode according to claim 2, wherein the adhesive portion is formed of a conductive adhesive material. The groove portion that communicates with the concave portion is formed in the main body portion of the metal electrode portion so as to facilitate attachment / detachment of the biological contact electrode portion. Electrode for living body.

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