JPH0749922Y2 - Biomedical electrode - Google Patents

Description

[Detailed description of the device]

 [Purpose of device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biomedical electrode, and more particularly to a pregel type disposable biomedical electrode in which an electrolyte has been injected in advance.

[0002]

2. Description of the Related Art A biomedical electrode is used to fix an electrocardiogram, an electromyogram, etc. from the surface of a living body by fixing it on the surface of the living body using an adhesive tape or the like, and record the measurement.

There are reusable and disposable biomedical electrodes. The latter is further divided into a type in which an electrolyte is injected at the time of use and a type called a pregel type in which an electrolyte is injected in advance. The present invention relates to a pregel type disposable biomedical electrode.

When deriving the electrical activity of the living body from the body surface, if the contact resistance between the living body and the electrode is high, noise due to hum from the AC power source, sway of the lead wire, etc. easily mixes in the measured waveform, The S / N ratio of the measurement system deteriorates. As a countermeasure against this, in order to reduce the contact resistance between the living body and the electrode, an electrolyte is generally injected into the electrode.

It is known that the higher the water content of an electrolyte, the greater the effect of reducing the contact resistance. However, if the water content is high, the fluidity becomes large, and it cannot be held on the electrode as it is, and problems such as outflow to the outside of the electrode and accompanying electrolyte shortage are likely to occur. In order to solve this problem, a sponge is usually fixed on the electrode and an electrolyte is injected into the sponge.

On the other hand, the film electrode element is thinner and more flexible than the conventionally used disc-shaped electrode element, is excellent in workability and electrode characteristics, and is suitable as a biological electrode element. In order to make the best use of the characteristics, this film electrode element has been conventionally used in combination with a solid gel which is an agar-like electrolyte having an adhesive property as an electrolyte, and a sponge has not been used. However, in order to further reduce the contact resistance with the surface of the living body, it is desirable to use a liquid electrolyte having a high water content. In order to retain the liquid electrolyte on the film electrode element, the liquid electrolyte may be injected into the sponge fixed on the electrode as in the case described above.

As a method for fixing this sponge on the electrode element, the following method has been conventionally used. That is, the first method is to fix the sponge to the electrode element by the hot melt method. The second method is to bond the sponge to the electrode element using a solvent-based adhesive. The third method is to bond the sponge to the electrode element using an instant adhesive such as cyanoacrylate. In the fourth method, a method in which a sponge is fused on the electrode element using electromagnetic waves or ultrasonic waves has been used.

[0008]

However, each of the conventional methods for fixing the sponge on the electrode element has the following problems. That is, in the first method, the sponge and the electrode element must be made of a material having high heat resistance against high temperature, and a convex portion is formed on the sponge side film electrode element by the hot melt material. Further, in the second method, it takes time to completely bond the film electrode element to the film due to the solvent. In the third method, the adhesive cures the sponge and the film electrode element, causing skin damage when the electrode is attached. Further, in the fourth method, the melting points of the materials to be fused must be close to each other, and there is a problem that the sponge and the film electrode cannot be fused because of different melting points.

The present invention has been made in view of the above points, and provides a biomedical electrode which can reliably fix a sponge to a film electrode element and which does not deteriorate the performance of the film electrode element and the sponge. The purpose is to provide. [Device configuration]

[0010]

In order to achieve the above object, a biomedical electrode of the present invention comprises a film electrode element and an opening.
One side of the film electrode element is bonded to one side
The double-sided adhesive tape and electrolyte are injected.
Touch the other side of the double-sided adhesive tape while covering the opening.
It is characterized in that it is equipped with a sponge .

[0011]

According to the above construction, since the film electrode element and the sponge are fixed by the double-sided adhesive tape, they are not affected by heat or solvent. Therefore, the performances of the film electrode and the sponge do not deteriorate. Further, since the double-sided adhesive tape has an opening formed therein, the film electrode and the sponge are in direct contact with each other, and electrical conduction is obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure,
The lead wire 2 is connected to the film electrode element 1.
On one surface of the film electrode element 1, one side of a double-sided adhesive tape 4 having an opening 3 of an appropriate shape is adhered. On the other side of the double-sided adhesive tape 4, a sponge 5 in which a liquid electrolyte having a high water content is injected is adhered. In this way, the biomedical electrode 6 is constituted by the film electrode element 1 and the sponge 5 which are integrally bonded and fixed via the double-sided adhesive tape 4.

According to this embodiment, the film electrode element 1 and the sponge 5 are integrally bonded and fixed via the double-sided adhesive tape 4, so that they can be firmly fixed without being affected by heat or solvent. it can. Therefore, the performances of the film electrode element 1 and the sponge 5 are not deteriorated. Further, since the double-sided adhesive tape 1 has the opening 3 formed therein, the film electrode element 1 and the sponge 5 are in direct contact with each other, and electrical conduction is obtained.

[0014]

As described above, according to the present invention,
The film electrode element and the sponge can be firmly fixed to each other with a simple structure without deteriorating the performance.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of an embodiment of a biomedical electrode according to the present invention.

[Explanation of symbols]

 1 film electrode element 3 opening 4 double-sided adhesive tape 5 sponge 6 biomedical electrode

Claims (1)

[Scope of utility model registration request] 1. A film electrode element and the film electrode having an opening.
Double-sided adhesive with one side bonded to one side of the film electrode element
Tape and electrolyte injected to cover the opening
Sponge adhered to the other side of the double-sided adhesive tape
An electrode for a living body , comprising: