JPH0344170Y2 - - 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 having the above-mentioned structure is made of metal and is heavy, making it unsuitable for holding by adhesion to the skin surface M, and the polarization voltage increases, making the electrode characteristics unfavorable.

Further, the electrode element 1 was manufactured by silver plating, but the 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, and this electrode element has a lead wire attached to it, and the outer periphery of the electrode element has a downwardly expanding shape. a head having a protruding slope, a neck below the head and having a fitting part that is thinner than the head and capable of fitting and locking an elastic base material; and a neck below the neck. Metal powder is coated on the outer peripheral surface of the base material of the synthetic resin electrode element, which has a bottom part on the side that supports the neck part, is wider than the neck part, and has an uneven bottom part that comes into contact with the skin surface of the living body. This is an electrode element for a biological induction electrode, which is characterized in that conductivity is imparted to the electrode.

[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.

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

Furthermore, since synthetic resin is used as the base material of the electrode element, it is lightweight.

〔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, a neck 12 formed under the head 11 to be thinner than the head 11, and a neck 12 which is located under the neck 12 and supports the neck and is in contact with the skin surface. As shown in FIG. 2, the base material 14 is made of synthetic resin, and its outer peripheral surface is coated with silver.
Silver Ag, amorphous alloy, silver chloride including Agcl
A powder of silver and amorphous alloy containing Agcl is 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.

One end of a lead wire (not shown) is fitted into the head 11, and an inclined portion 11a is formed on the outer periphery of the head 11 so as to extend downward.

The neck 12 supporting this head 11 is the head 11
It is formed thinner. This neck 12 is the head 1
The reason why it is made thinner than 1 is to easily and reliably fit and lock with the elastic base material 2 without using a clamping member.

That is, as shown in FIG. 3 (this FIG. 3 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 inclined part 11a, 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 12 of the electrode element 1.
The head 11 and the bottom 1
It is clamped and locked with 3.

The reason why the head 11 is formed with the downwardly expanding inclined part 11a is that when the elastic base material 2 is fitted and locked to the neck part 12, the head part 11 of the electrode element 1 is
1 is inserted into the small hole 2a of the elastic base material 2 from its tip, the elastic base material 2 moves downward while sliding along the sloped part 11a that protrudes downward from the head 11 and expands and contracts. The base material 2 can be smoothly fitted and locked onto the neck portion 12.

The elastic base material 2 has a removable piece 3 protruding from its periphery.
This facilitates attachment and detachment of the bioinduction electrode A to and 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 that supports the neck part 12 is formed wider than the neck part 12, and by forming the bottom part 13 wider than the neck part 12, as described above, the elastic base material 2 fitted to the neck part 12 can be extended to the head part 11.
They are supported by being clamped together. Further, the bottom surface 13a of this bottom portion 13 that directly contacts the skin surface of the living body is a second
By forming a large number of projections and recesses 13b as shown in FIGS. 3 and 3, the direct contact area is increased and the electrode characteristics are stabilized.

[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 the living body induction electrode is brought into close contact with the skin surface, it is difficult to fall off from the skin surface and becomes 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.

In addition, since the head part is formed with a downwardly expanding sloped part, when fitting and locking the expandable base material 2 to the neck part, the head of the electrode element can be inserted from its tip into the small hole of the expandable base material. The expandable base material advances downward while sliding along the sloped portion that protrudes downwardly toward the head, so that the expandable base material can be smoothly fitted and locked to the neck portion.

Since the uneven portion is formed on the bottom surface of the upper portion that contacts the skin surface of the living body, the contact area that comes into contact with the skin surface increases, and as a result, the electrode characteristics are stabilized.

[Brief explanation of the drawing]

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

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 and has an inclined part whose outer periphery extends downward and protrudes toward the end, and a stretchable base material that is thinner than the head part and is located below the head part. The neck part is formed with a fitting part that can be fitted and locked, and the bottom part is located below the neck part, supports the neck part, is wider than the neck part, and has an uneven part formed on the bottom surface that comes into contact with the skin surface of the living body. The outer peripheral surface of the base material of the synthetic resin electrode element is coated with metal powder to impart conductivity.
Electrode element for biological induction electrodes. (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.