JPH0344171Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrode element of a biological induction electrode used for detecting weak voltage from a living body.

[Conventional technology]

As is well known, bioelectricity generated in a living body is induced by the activities of the heart, brain, muscles, etc.

In particular, bioelectricity generated in the heart is measured by recording weak currents induced on the skin of a living body using an external electrocardiograph.
Diagnosing heart abnormalities.

In this electrocardiograph, in order to electrically connect the input section to the living body, the living body's induction electrode must be brought into close contact with the skin surface of the living body.

The conventional bioinductive electrode A that is brought into close contact with the surface of the skin will be explained with reference to FIG. This stretchable base material 2 is clamped at the top and bottom by an upper clamping member 20 and a lower clamping member 21 to fix the stretchable base material 2 to the electrode element 1 .

Further, the bottom portion 13 of the electrode element is formed to be wide, and is in direct contact with the skin surface M of the living body, so that a weak current of the living body is derived from within the living body.

[Problem that the invention attempts to solve]

Among the biological induction electrodes A having such a configuration, the electrode element 1 is important among the biological induction electrodes A because it directly contacts the skin surface M and derives a weak current.

However, the electrode element 1 with the above-mentioned configuration is made of metal and is heavy, making it unsuitable for holding by adhesion to the skin surface M, and the polarization voltage increases, resulting in unfavorable electrode characteristics.

Further, the electrode element 1 was manufactured by silver plating, but this method of manufacturing the electrode element by silver plating complicates the process, is dangerous, and is expensive to manufacture.

Furthermore, the elastic base material 2 that is fitted with the electrode element 1 has two upper and lower clamping members 20 to maintain the fitted state.
I needed 21.

The present invention aims to solve the problems caused by the electrode element 1 being made of metal, and the problem of fitting and maintaining the elastic base material to the electrode element.

[Means for solving problems]

In order to achieve the above object, the present invention provides the following biological induction electrode. That is, the present invention is an electrode element for a biological induction electrode that is in close contact with the skin surface of a living body and derives a weak current from within the living body. A neck part that is thinner than the head part and has a fitting part that can fit and lock an elastic base material, and a neck part that is below this neck part and supports this neck part and is wider than this neck part and has a part that is made of living body skin. a bottom portion having a concavo-convex portion formed on the bottom surface that contacts the surface; the head portion has an inclined portion whose outer circumferential portion protrudes downwardly in a shape that widens toward the bottom; Metal powder is coated on the outer circumferential surface of the base material of the synthetic resin electrode element, which is recessed until it has the same diameter as the neck part and has a recessed part that is continuous with the neck part, thereby imparting conductivity. This is an electrode element for a biological induction electrode, which is characterized by the following.

[Effect]

In the above configuration, the present invention forms the electrode element by coating the outer surface of the synthetic resin base material of the electrode element with metal powder, so that irregularities are formed on the outer peripheral surface of the electrode element. In addition, since the neck part is provided below the head part and is thinner than the head part and has a fitting part formed therein, the elastic base material fits and locks into the fitting part of the neck part.

Further, the outer peripheral part of the head part was recessed so that a part of the sloped part which protruded downward and spread out until it had the same diameter as the neck part, so that a recessed part continuous with the neck part was formed. It is possible to coat the base material well even with metal powder, and at the same time, when the lead wire is fitted to the head, the electrical path with the bottom is shortened, the electrical conduction is effective, and the conductivity is also improved. improves.

Furthermore, since synthetic resin is used as the base material of the electrode element, the weight is reduced.

In addition, since the bottom surface that contacts the skin surface of the living body is provided with an uneven portion, the contact area is increased, and as a result, the electrode characteristics are stabilized.

〔Example〕

Regarding embodiments of the present invention, how the configuration of the present invention is actually embodied will be described below with reference to the drawings, together with its operation.

FIG. 1 is a perspective view of an electrode element for a biological induction electrode of the present invention, and FIG. 2 is a sectional view thereof, where 1 indicates the electrode element.

This electrode element 1 includes a head 11 to which a lead wire (not shown) is attached, a neck 12 formed thinner than the head 11, and a bottom 13 located below the neck 12 and wider than the neck 12. As shown in Fig. 2, the base material 14 is made of synthetic resin, and the outer peripheral surface is coated with powder of silver Ag containing silver chloride Agcl, amorphous alloy, and powder of silver and amorphous alloy containing silver chloride Agcl. etc. are coated as a coating material 15 to impart conductivity.

The reason why the base material 14 is made of synthetic resin is that it is suitable for mass production, the cost can be kept low, and the weight is reduced to stabilize wearing, and it prevents heat conduction and prevents the feeling of coldness on the skin surface when worn. for the base material 1
The reason why the outer peripheral surface of the base material 14 is coated with the metal powder 15 is that unevenness is formed on the outer peripheral surface of the base material 14, increasing the effective area and improving the electrode characteristics.

The head 11 has a lead wire (not shown) fitted therein, and has an inclined part 11b whose outer periphery protrudes downward and widens towards the end.A part of the inclined part 11b is attached to the neck part 12 A recessed portion 11a is formed by recessing until the diameter becomes the same as the diameter, and this recessed portion 11a is continuous with the neck portion 12.

The neck 12 supporting this head 11 is the head 11
It has a fitting 12a formed narrower and a continuous portion 12b continuous with the recessed portion 11a of the head. This fitting part 12a does not use a clamping member,
This is to ensure that the elastic base material 2 is fitted and locked easily.

That is, as shown in FIG. 4 (FIG. 4 is a cross-sectional view of a bioinductive electrode A formed by attaching various members such as a stretchable base material 2 and an adhesive base material 4 to an electrode element 1). , a small hole 2a is made in the center of the elastic base material 2, and the head 11 of the electrode element 1 is inserted into the hole from below.
When inserted, the small hole 2a is widened by the elasticity of the elastic base material 2 when it passes through the tapered part 11b, and when the elastic base material 2 reaches the neck part 12, the neck part 12 is formed to be thin. The restoring force of the small hole 2a due to its own elasticity is narrowed. Therefore, the elastic base material 2 has a fitting part 12a of the neck part 11 of the electrode element 1.
The head 11 and the bottom 1
It is clamped and locked with 3.

Further, as shown in FIG. 2, the recessed portion 11a of the head 11 and the continuous portion 12b that is continuous with the recessed portion 11a of the neck portion 12 are formed by coating with metal powder. Sometimes even a small amount of metal powder can provide good coating and at the same time good conductivity.

As shown in FIG. 3, the stretchable base material 2 has a removable piece 3 protruding from its periphery, and the bioinduction electrode A
This makes it easy to attach and detach the body from the skin surface M of the living body. Further, an adhesive base material 4 is attached to the lower side of the elastic base material 2, and the bioinductive electrode A is attached to the skin surface of the living body by the adhesiveness of the adhesive 5 on the lower side of the adhesive base material 4. to make it removable.

A neck portion 12 is provided below the neck portion 12 of the electrode element 1.
The bottom part 13 supporting the neck part 12 is formed wider than the neck part 12, and by forming the bottom part 13 wider, the elastic base material 2 fitted into the fitting part 12a of the neck part 12 is held and supported together with the head part 11, as described above.

In addition, the bottom surface 13a of the bottom portion 13 that directly contacts the skin surface M of the living body is formed with a large number of uneven portions 13b as shown in FIGS. 2 and 3, thereby increasing the direct contact area and improving the electrode characteristics. Stabilize.

[Effect of idea]

As described above, according to the present invention, the electrode element is formed by coating the outer peripheral surface of the synthetic resin base material with metal powder, so that unevenness is formed on the outer peripheral surface of the electrode element, increasing the effective area, thereby improving the electrode properties. As a result, the weight can be reduced, and due to the weight reduction, when it is brought into close contact with the skin surface, the biological induction electrode is difficult to fall off from the skin surface and is stable.

In addition, since the electrode element is made of synthetic resin, it can be mass-produced at low cost, and is disposable, improving hygiene. At the same time, it prevents heat conduction and reduces the risk of cooling when worn on the skin. You can prevent the feeling.

Furthermore, the neck part is made thinner than the head and bottom parts to form a fitting part, the elastic base material is fitted into this fitting part, and the elastic base material is held and locked between the head part and the bottom part. Therefore, there is no need to provide a clamping member, which saves members, and also simplifies the production process and reduces production costs.

Further, the upper head has an inclined part whose outer circumferential part protrudes downward and widens toward the end, and a part of this inclined part is recessed until it has the same diameter as the diameter of the neck part 12. Since a continuous concave part was formed,
When coating the base material 2 with metal powder,
It is possible to coat even a small amount of metal powder well, and at the same time, when the lead wire is fitted to the head, the electrical path with the bottom is shortened, the electrical conduction is effective, and the conductivity is also improved. improves.

In addition, since a large number of uneven portions are formed on the bottom surface that contacts the skin surface of the living body, the contact area that comes into contact with the skin surface increases, resulting in effects such as stabilization of electrode characteristics.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an electrode element for a bioinductive electrode of the present invention, Fig. 2 is a sectional view taken along the line - - of Fig. 1, Fig. 3 is a bottom view of the bottom of the electrode element, and Fig. 4 is a perspective view of the bioinductive electrode. The cross-sectional view, FIG. 5, is an explanatory diagram of a conventional biological induction electrode. DESCRIPTION OF SYMBOLS 1... Electrode element, 11... Head, 11a... Recessed part, 12... Neck, 12a... Neck fitting part,
13...bottom, 13a...bottom of the bottom, 12b...
...Uneven parts.

Claims (1)

[Claims for Utility Model Registration] (1) An electrode element for a biological induction electrode that is in close contact with the skin surface of a living body and derives a weak current from within the living body,
This electrode element has a head part to which a lead wire is attached, a neck part which is located below the head part and has a fitting part which is thinner than the head part and can fit and lock an elastic base material, and this neck part. The head has a bottom that supports the neck, is wider than the neck, and has an uneven bottom surface that contacts the skin surface of the living body, and the head has an outer circumferential portion facing downward. An electrode element made of a synthetic resin, which has a protruding slope part that spreads toward the end, and a part of the slope part is recessed until it has the same diameter as the neck part, forming a concave part that is continuous with the neck part. An electrode element for a biological induction electrode, characterized in that the outer peripheral surface of a base material is coated with metal powder to impart conductivity. (2) The electrode element for a biological induction electrode according to claim 1, wherein the metal powder is silver Ag containing silver chloride Agcl. (3) The electrode element for a biological induction electrode according to claim 1, wherein the metal powder is an amorphous alloy. (4) The metal powder is a mixed powder of silver and amorphous alloy containing silver chloride,
An electrode element for a biological induction electrode according to claim 1 of the registered utility model claim.