JPH058971Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a lead wire fixing fitting for a bioelectrode.
More specifically, the present invention relates to a lead wire fixing fitting for a bioelectrode for connecting a lead wire of a measuring device such as an electrocardiograph to a bioelectrode that derives bioelectricity from the skin surface of a living body.

[Conventional technology]

Conventionally, medical electronic measurements that guide bioelectricity generated within a living body to the outside, record it, and diagnose it have been widely useful in medical activities, such as electrocardiograms, electromyograms, and electroencephalograms.

A differential amplifier and a recorder are used for this bioelectrical measurement, but a highly sensitive and stable device is required between the measuring device and the part to be measured such as the skin. Inductive electrodes are used.

The quality of the induction electrode is determined by comprehensively evaluating the potential difference between the electrode pair (electrode voltage or offset voltage), initial drift characteristics, noise characteristics, impedance characteristics, defibrillation characteristics, etc.

In addition, the factors governing this electrode characteristic are:
Not only physical properties such as the electrode element material, electrolyte composition, and uniformity, but also the electrical contact between the electrode and the part to be measured and the stability of the electromechanical connection between the electrode and the lead wire have a significant influence. Generally, a clip type or hook type is used in which a concave portion on the stopper side is press-fitted into a convex portion on the bioelectrode side.

[Problem that the invention attempts to solve]

However, for example, with a Holter electrocardiograph that measures and records electrocardiograms over a long period of time, the living body electrodes, lead wires, and electrocardiograph are worn while going about their daily lives, so the relationship between the electrodes and the lead wire fixing fittings may be affected by friction caused by clothing. Positional fluctuations are captured as noise on the electrocardiogram, which is a major cause of misdiagnosis.

Furthermore, in exercise load measurement in which the action potential of the heart is monitored while the patient is exercising, a situation similar to the Holter electrocardiogram described above may occur due to body movement.

This means that the electromechanical connection between the electrode and the stopper is
This is because a clip method, a hook method, or the like is used to press-fit and connect a protrusion on the electrode side and a recess on the stopper side.

In other words, if the bonding force between the electrode and the stopper is too weak, the noise mentioned above is likely to be introduced, while if the bonding force is too strong, it will require excessive effort to attach and detach, which will not only impair work efficiency but also cause some problems. If this happens, the electrolyte in the auxiliary member that electrically connects the part to be measured, such as the skin, and the electrode element will leak.

This electrolyte leakage 1. The effective area from which active electrodes are derived changes.

2. External leakage of electrolyte leads to unnecessary signals.

3. Decrease the adhesive strength of the adhesive surface that fixes the electrode to the part to be measured.

This causes problems such as

Therefore, there is a drawback that the connection between the electrode and the lead wire must be carried out by a person skilled in the work.

Another major drawback is that conventional fasteners are heavy compared to the bonding force with the electrodes, have a large inertia, and cannot keep up with the slight movements of the body, contributing to noise generation.

The present invention was made to compensate for the above-mentioned drawbacks at the signal output end of a weak potential measuring device, and includes:
When connecting the induction electrode and the lead wire, it is easy to perform the work, has excellent electrical stability in the connected state, and does not cause a decrease in the measurement accuracy of the measuring instrument. The present invention provides a lightweight induction electrode fastener that is extremely easy to fall off.

[Means for solving problems]

In order to achieve the above object, the present invention provides the following lead wire fixing fitting for a bioelectrode.

That is, the present invention consists of a clamping member that immerses the head of a bioelectrode having a protruding head and a neck and clamps the neck, and an insulating support case that supports and covers this clamping member. , the holding member has a small hole in the center of the conductive thin plate and a plurality of radial cuts around the small hole to form a plurality of tongues, and the diameter of the small hole is equal to the diameter of the neck of the bioelectrode. This is a lead wire fixing fitting for a bioelectrode, characterized in that it is formed smaller than the diameter.

[Effect]

In the above configuration, the support case supports the clamping member, covers the clamping member, and electrically insulates and protects the clamping member from the outside.

In addition, since the holding member is made of a conductive thin plate, it is light and has low inertia, so it moves following body movements and does not shift.

Furthermore, since the diameter of the small hole in the holding member is smaller than the diameter of the neck of the bioelectrode, the tongue piece becomes long, and when the head is inserted into the small hole, the tip of the tongue piece around the small hole will be pushed. It is expanded, and its restoring force presses the neck and locks the head.

Further, the plurality of tongues of the clamping member make the pressing force on the neck independent of each other, increasing the contact surface and stabilizing the electrical connection.

At the time of detachment, the tongue piece of the clamping member is bent by simply lifting the support case once, and the bioelectrode lead wire fixing fitting is easily detached.

〔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 bottom view showing an embodiment of the present invention. In the figure, 1 is an insulating support case, and inside this support case 1, a conductive clamping member 2 is located at its base end 2a. By embedding the periphery,
A bioelectrode lead wire fixing fitting 3 of the present invention is constructed.

A base end 2a of the holding member 2 is connected to a lead wire 4 (not shown) inside the support case 1.

Further, a small hole 5 is bored in the center of the holding member 2, and a plurality of notches 6 are provided radially around the small hole 5.

A plurality of tongues 7 are formed on the holding member 2 by the small holes 5 and the plurality of notches 6.

Note that the holding member 2 is made of a thin plate, and the entire bioelectrode lead wire fixing fitting 3 of the present invention is lightweight, and its inertia is small so that it can faithfully follow body movements.

Therefore, even during exercise load measurements, etc., the contact surface with the skin remains electrically stable without shifting, and no noise is generated.

FIG. 2 is a perspective explanatory view of the clamping member 2 of the same embodiment, and the clamping member 2 is made of a thin plate of amorphous metal.

Amorphous metal has excellent strength, hardness, and toughness, so it can maintain a stable connection even when large external forces are applied locally during attachment/detachment to the electrode element, and it can be made into a lightweight thin plate. It is from.

In addition, amorphous metals have highly chemically active properties, but by adding elements such as chromium and molybdenum, which tend to form passive films, they exhibit even more corrosion resistance, making them suitable for connection materials. There is.

A small hole 5 is made in the center of this circular thin plate of amorphous, and a plurality of tongues 7 are formed by making a plurality of cuts 6 radially around the small hole 5.

Therefore, the envelope line connecting the tips 7a of the plurality of tongue pieces 7 coincides with the small hole 5.

Furthermore, by terminating each of the notches 6 at an appropriate position in front of the proximal end 2a, which is the periphery of the holding member 2, appropriate elasticity and independence of the tip 7a of each tongue piece 7 can be maintained. , each tongue piece 7 is kept integral with each other by the base end 2a.

Therefore, each tongue piece 7 of the clamping member 2 has a tip 7a.
Even if they are independent, they maintain stable electrical continuity with each other.

In addition, since the diameter of the small hole 5 is formed to be smaller than the diameter of the neck portion 8b of the electrode element 8, which will be described later, the tongue piece 7 becomes longer, so that locking and conduction in the attached state can be maintained well. I can do it.

FIG. 3 is a side cross-sectional view showing the usage state of one embodiment of the present invention, and shows a state in which the bioelectrode lead wire fixing fitting of the present invention is attached to the bioelectrode.

In the figure, 8 is an electrode element, and this electrode element 8 includes a head 8a projecting upward, a neck 8b formed thinner than the head, an inclined shoulder 8c, and a seat 8 with a flat bottom surface.
It has b.

The electrode element 8 is supported from the side by an element support base material 9, and an auxiliary member 10 made of a conductive hydrogel layer having an electrolyte soaked in the bottom surface is attached to the seat portion 8b.

Further, an adhesive base material 11 (not shown) for adhering to the skin surface is attached to the bottom of the element support base material 9, and the adhesive base material 11 normally adheres to a separator 13 via an adhesive material 12 on the lower surface. Base material 11
Protects the adhesive side from exposure to air.

The bioelectrode 14 configured in this manner has a cover 15 adhered to the lower part of the separator 13, and the cover 15 is peeled off from the bioelectrode 14 together with the separator 13 when the bioelectrode 14 is used. Ru.

The bioelectrode 14 is fitted with a bioelectrode lead wire fixing fitting 3 of the present invention for connecting a lead wire 4 from a measuring instrument such as an electrocardiograph (not shown).

In this bioelectrode lead wire fixing fitting 3, the proximal end 2a of the conductive clamping member 2 whose cross section is made of an amorphous thin plate is connected to the insulating clamping case 1, as shown in the figure.
The proximal end 2a of the holding member 2 is connected to the lead wire 4 of the measuring instrument.

In addition, since the diameter of the small hole 5 formed in the holding member 2 is sufficiently smaller than the neck portion 8b of the electrode element 8, the plurality of tongue pieces 7 formed are sufficiently long, and the inclined shoulder portion Even if it is tilted along 8c, the tip 7a can press the neck 8b and lock the head 8a.

The plurality of tongue pieces 7 are connected to the neck portion 8b of the electrode element 8.
In addition to reducing contact resistance by pressing with each tip 7a, the tongue piece 7 makes pressure contact in an inclined manner along the inclined shoulder portion 7c, which further reduces contact resistance and reduces noise. A stable electrical connection can be made.

Furthermore, since each of the tongues 7 is thinner toward the tip 7a and has weaker elasticity, the electrode element 8 is guided into the small hole 5 in the center during mounting, thereby facilitating mounting.

Since the tongue piece 7 is easy to attach, excessive force is not required when attaching it, and therefore there is no possibility that the electrolyte will leak from the auxiliary member 9 between the electrode element 8 and the skin surface.

When detaching the lead wire, simply by lifting the support case 1, the elastic tongue piece 7 bends and the bioelectrode lead wire fixing fitting 3 can be easily detached from the bioelectrode.

FIG. 4 is a cross-sectional explanatory view of another embodiment of the present invention. This embodiment differs from the previous embodiment in that an electromagnetic shield is provided in the support cover 1 of the bioelectrode lead wire fixing fitting 3. This is because the shield plate 16 is provided.

This seal plate 16 is connected to the shielded lead wire 4
By connecting to the shield side of the bioelectrode, disturbances caused by static electricity and magnetism can be shielded and eliminated, and only bioelectrical signals derived from the bioelectrode can be stably sent to the measuring instrument.

As described above, the present invention consists of a clamping member 2 having a small hole 5 and a tongue piece 7, and a support case 1 in which the clamping member 2 is embedded. Since the tongue piece 7 is formed sufficiently small, the tongue piece 7 is sufficiently long so that it can press the neck part 8b of the electrode element 8 in an inclined state and securely lock the head part 8a.

Further, since the plurality of tongues 7 are provided on the holding member 2, the mounting can be done with a light touch, and in the mounted state, the plurality of tongues 7 have independent elasticity on the shoulders 8c of the electrode element 8. Since the contact surface is kept wide, electrical continuity can be maintained even better.

Furthermore, when detaching, the bioelectrode lead wire fixing fitting 3 can be easily and easily detached from the bioelectrode by simply lifting the support case 1.

[Effect of idea]

As described above, according to the present invention, since the holding member is formed of a thin plate, it is light and has small inertia, so that it can move faithfully following body movements. Therefore, there is no misalignment with the skin surface, and generation of noise and the like can be prevented.

In addition, since the holding member has a small hole and multiple tongue pieces, it can be given appropriate elasticity, so it can be easily applied with a weak force without requiring skill, and there is no risk of putting unnecessary stress on the patient's skin. It's gone.

Furthermore, since the diameter of the small hole in the holding member is smaller than the diameter of the neck of the electrode element, the tongues become long, and when the head is recessed during installation, the tips of the multiple tongues are spread out and tilted. The restoring force can always stably press the neck, and the head of the immersed bioelectrode can be locked to the tip of the tongue to stably maintain the attached state, improving connection quality. be able to.

Moreover, the insulating support case has the effect of maintaining the electrical stability of the derived bioelectrical signal by insulating the clamping member from the outside.

[Brief explanation of the drawing]

Fig. 1 is a bottom view showing one embodiment of the present invention;
FIG. 3 is a side cross-sectional view showing the usage state of the same embodiment, and FIG. 4 is a cross-sectional explanatory view of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Support case, 2... Holding member, 5... Small hole, 6... Notch, 7... Tongue piece, 8... Electrode element, 8a... Head, 8b... Neck.

Claims (1)

[Claims for Utility Model Registration] (1) A clamping member for inserting the head of a bioelectrode having a protruding head and a neck and clamping the neck, and an insulating material for supporting and covering the clamping member. The holding member has a small hole in the center of the conductive thin plate and a plurality of radial cuts around the small hole to form a plurality of tongue pieces, and the diameter of the small hole is A lead wire fixing fitting for a bioelectrode, characterized in that the diameter is smaller than the diameter of the neck of the bioelectrode. (2) A shield plate for electromagnetically shielding the holding member is provided in the support case,
The bioelectrode lead wire fixing fitting according to claim 1. (3) The lead wire fixing fitting for a biological electrode according to claim 1, wherein the holding member is made of amorphous metal.