JPH061686Y2 - Biological electrode lead wire stopper - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a lead wire stopper for a bioelectrode, and more particularly, to a bioelectrode for deriving bioelectricity from the skin surface of a living body, and measuring with an electrocardiograph or the like. The present invention relates to a biomedical electrode lead wire stopper for connecting a lead wire on a device side.

[Conventional technology]

2. Description of the Related Art Conventionally, medical electronic measurement in which bioelectricity generated in a living body is guided to the outside, and recorded and diagnosed, has been widely used for medical activities as an electrocardiogram, an electromyogram, an electroencephalograph, and the like.

A differential amplifier or recorder is used for this bioelectrical measurement, but it is highly sensitive and stable for deriving a weak potential in the living body between the measuring instrument and the measured part such as skin. Different induction electrodes are used.

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

Further, as factors that control the electrode characteristics, not only physical properties such as electrode element material, composition of electric field and uniformity,
It is said that 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 great influence, and in general, the concave part on the fastener side is pressed into the convex part on the biological electrode side. Clip method and hook method are used.

[Problems to be solved by the device]

However, for example, in a Holter electrocardiograph that measures and records an electrocardiogram for a long time, since daily life is performed with a bioelectrode, a lead wire, and an electrocardiograph attached, the electrode due to rubbing clothes
Relative positional fluctuation between the lead wire stoppers is captured as noise on the electrocardiogram, which is a major cause of misdiagnosis.

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

This is a clip system in which the electromechanical connection between the electrode and the fastener is a press-fit connection between the protrusion on the electrode and the recess on the fastener.
This is because the hook method is used.

That is, if the coupling force between the electrode and the fastener is too weak, the above-mentioned noise is likely to be introduced, and on the contrary, if the coupling force is too strong, excessive labor is required at the time of attachment / detachment, which not only impairs workability,
If a little, the electrolyte solution of the auxiliary member that electrically connects the measured part such as the skin and the electrode element leaks.

This electrolyte leakage 1) The effective area for deriving the action potential changes.

2) Induction of unnecessary signals by external leakage of electrolyte.

3) Decrease the adhesive strength of the adhesive surface that fixes the electrolysis to the measured part.

It causes troubles such as.

Therefore, there is a problem that a person skilled in the work must connect the electrode and the lead wire.

Another major problem is that the conventional fasteners are heavy in comparison with the coupling force with the electrodes, have a large inertia, and cannot keep up with the minute movements of the body, which contributes to noise generation.

The present invention has been made to solve the above problems at the signal derivation end of a weak potential measuring device, and can easily perform work when connecting the induction electrode and the lead wire, and (EN) Provided is a lead wire stopper for a biomedical electrode, which is excellent in electrical stability, does not cause a decrease in measurement accuracy of a measuring instrument, and is extremely easy to detach a lead wire after use.

[Means for solving problems]

In order to achieve the above object, the present invention provides a lead wire stopper for a biomedical electrode as follows.

That is, according to the present invention, at least one sandwiching member that sandwiches the neck by immersing the head of the bioelectrode having a protruding head and a neck thereof, and supporting the sandwiching member and covering the sandwiching member. The sandwiching member has a small hole in the center of the inductive thin plate, and a plurality of notches are formed radially around the small hole to form a plurality of tongue pieces. Is formed to be smaller than the diameter of the neck portion of the bioelectrode, and a projection is provided on at least a part of the outer periphery of the support case.

[Action]

In the above structure, the support case supports the holding member and covers the holding member to electrically insulate and protect the outside.

Further, since the holding member is formed of a conductive thin plate, it is light and has a small inertia, so that it moves following body movements and does not shift.

Further, since the holding member is formed such that the diameter of each small hole is smaller than the diameter of the neck portion of the biological electrode, the tongue piece becomes long,
When the head is immersed in and attached to each small hole, the tip of the tongue around each small hole is spread, and the restoring force presses the neck and locks the head.

Further, the plurality of tongue pieces of the holding member make the pressing force to the neck portion independent from each other, increase the contact surface to the neck portion, and stabilize the electrical connection.

When a plurality of the sandwiching members are used, the contact surface with the neck portion is further increased and the electrical connection is further stabilized.

At the time of detachment, each tongue piece of the holding member is bent only by lifting the protrusion on the outer periphery of the support case, and the lead wire stopper for the biomedical electrode is easily detached.

〔Example〕

With respect to the embodiments of the present invention, how the structure of the present invention is practically embodied will be described below with reference to the drawings.

FIG. 1 is a bottom view showing an embodiment of the present invention.
Reference numeral 1 denotes an insulating support case. The support case 1 is provided with a protrusion 1a on a part of its outer circumference.

The protrusion 1a is operated by pinching it with a finger when attaching or detaching.

In addition, two conductive holding members 2 and 2 are superposed in the support case 1 and the peripheral portion which is the base end 2a thereof is embedded, so that the lead wire stopper 3 for the bioelectrode of the present invention is formed. Is configured.

The base ends 2a, 2a of the two sandwiching members 2, 2 are connected to one end (not shown) of the lead wire 4 inside the support case 1.

Further, small holes 5 and 5 are formed in the central portions of the holding members 2 and 2, respectively, and a plurality of notches 6 are radially provided around the small holes 5 and 5, respectively.

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

Further, each of the sandwiching members 2 and 2 is made of a thin plate, and the whole body of the biomedical electrode lead wire stopper 3 of the present invention is lightly constructed so that the inertia can be reduced and the body movement can be faithfully followed. There is.

Therefore, even when measuring an exercise load, the contact surface with the skin is not displaced and is electrically stable, and noise is not generated.

Reference numeral 4a is a protective member for protecting the vicinity of the mounting portion of the lead wire 4.

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

Aorufus metal is excellent in strength, hardness, and toughness, so it is possible to maintain a stable connection state even if a large external force is locally applied during attachment / detachment to / from the electrode element, and it can be made light as a thin plate. Is.

Amorphous metals have high chemical activity, but by adding elements such as chromium and molybdenum that are more likely to form a passivation film, they show more remarkable corrosion resistance. There is.

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

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

Further, by terminating each notch 6 at an appropriate position in front of the base end 2a which is the periphery of the holding member 2, each tip 7a of each tongue piece 7 maintains appropriate elasticity and independence, and The tongues 7 are kept integrated by the base end 2a.

Therefore, each tongue piece 7 of the holding member 2 maintains an electrically stable conductive state due to the integration of the base ends 2a even if the tip ends 7a are independent of each other.

Further, since the diameter of the small hole 5 is formed to be smaller than the diameter of the neck portion 8h of the electrode element 8 which will be described later, the tongue piece 7 becomes longer by that amount, and good locking and conduction in the mounted state are maintained. be able to.

In this embodiment, the sandwiching member 2 made of an amorphous material is used by stacking two sheets to further improve the electrical conductivity and the sandwiching force.

Further, although four tongues 7 are formed by the notches 6, this number may be increased or decreased as necessary.

FIG. 3 is a side sectional view showing a use state of one embodiment of the present invention, showing a state in which the bioelectrode lead wire stopper of the present invention is attached to the bioelectrode.

In the figure, 8 is an electrode element, and this electrode element 8 has a head portion 8a protruding upward, a neck portion 8b narrower than the head portion, an inclined mold portion 8c, and a seat portion 8d having a flat bottom surface.

The electrode element 8 is supported by the element supporting base material 9 from the side surface,
An auxiliary member 10 made of a conductive hydrogel layer is attached to the bottom of the seat 8d.

In addition, an adhesive base material 11 for adhering to the skin surface (not shown) is attached to the bottom of the element supporting base material 9.
Normally adheres the separator 13 via the adhesive 12 on the lower surface to protect the adhesive surface of the adhesive base material 11 from contact with air.

The bioelectrode 14 configured in this manner has a cover 15 adhered to the lower portion of the separator 13 thereof.
15, together with the separator 13, when using the bioelectrode 14,
The biological electrode 14 is peeled off.

The bioelectrode 14 is fitted with the bioelectrode lead wire stopper 3 of the present invention for connecting the lead wire 4 on the measuring instrument side such as an electrocardiograph (not shown).

In the biomedical electrode lead wire stopper 3, the base ends 2a, 2a of the two conductive sandwiching members 2, 2 whose cross sections are made of amorphous thin plates are embedded in the insulating support case 1 as shown in the figure. And the base ends of the two holding members 2 and 2.
2a, 2a are connected to the lead wire 4 on the measuring instrument side.

In addition, the two sandwiching members 2 and 2 have a small hole 5 formed therein.
Since the diameter of is sufficiently smaller than the neck 8b of the electrode element 8,
The plurality of tongues 7 and 7 formed are sufficiently long, and the tips 7a and 7a of the tongues 7 and 7a are inclined to the neck 8 even if they are inclined along the inclined shoulder 8c.
It is possible to press b and lock the head 8a.

The plurality of tongues 7 and 7 reduce contact resistance by pressing the neck 8b of the electrode element 8 with the tips 7a and 7a, and the tongues 7 and 7 extend along the slanted shoulder 7c. The contact resistance is further reduced, and stable electrical connection with less noise can be made.

Further, since the tongues 7 and 7 are formed so as to be thin toward the tips 7a and 7a and have weak elasticity, the electrode element 8 is not easily attached when the tongue 7 is attached.
Is guided to the small hole 5 in the central portion to facilitate mounting.

Since the tongues 7 and 7 are easily attached, an excessive force is not required at the time of attachment, and therefore, there is no possibility that the electrolytic solution leaks from the auxiliary member 10 between the electrode element 8 and the skin surface.

The element supporting base material 9 has a collar portion 9a on the outer periphery.
The lower end 1 of the support case 1 is brought into contact with 9a to stabilize the support case 1.

Therefore, the holding members 2 and 2 of the support case 1 and the electrode element 8 are
Improves stability of contact with.

When the lead wire is detached, the protrusions 1a (see FIG. 1) provided on at least a part of the outer circumference of the support case 1 are pinched with fingers and the support case 1 is lifted, and the elastic tongues 7, 7 bend. The biomedical electrode lead wire fastener 3 can be easily detached from the biomedical electrode.

Further, in this embodiment, the number of the holding members 2 is two,
This may be increased or decreased to 1 or 3 or more as required.

FIG. 4 is a cross-sectional explanatory view of another embodiment of the present invention. The difference of this embodiment from the above-mentioned one embodiment is that the support cover 1 of the biomedical electrode lead wire fastener 3 is provided with an electromagnetic shield. That is, the shield plate 16 is provided.

By connecting this shield plate 16 to the shield side of the shielded lead wire 4, the disturbance due to static electricity or magnetism is shielded and eliminated, and only the bioelectric signal derived from the bioelectrode is stably sent to the measuring instrument. You can

As described above, the present embodiment includes the plurality of holding members 2 having the small holes 5 and the tongue pieces 7 and the support case 1 in which the plurality of holding members 2 are embedded, and the small holes 5 hold each other. Since the tongues 7 are sufficiently long because they are formed to be sufficiently smaller than the neck 8b of the electrode element 8, the neck 8b of the electrode element 8 can be pressed in a tilted state and the head 8a can be reliably locked. .

Further, since the plurality of tongues 7 are provided on the plurality of sandwiching members 2 respectively, the tongues 7 can be lightly touched, and in the mounted state, the plurality of tongues 7 are independent of each other and the shoulders of the electrode element 8 are elastic. Since it inclines along the portion 8c and keeps the contact surface wide, it is possible to maintain better electrical conduction.

Furthermore, at the time of detachment, the projection 1a provided on at least a part of the outer periphery of the support case 1 can be picked up with fingers and lifted up.
It is light and can easily detach the bioelectrode lead wire stopper 3 from the bioelectrode.

[Effect of device]

As described above, according to the present invention, since the holding member is formed of a thin plate, it is light and has a small inertia, so that the holding member can faithfully follow body movements. Therefore, there is no deviation from the skin surface, and it is possible to prevent the generation of noise and the like.

Further, since the holding member is provided with a small hole and a plurality of tongue pieces, it can have appropriate elasticity and can be easily attached and detached even with a weak force, so that it does not require any skill for attaching and detaching and the patient There is no longer any need to put unnecessary stress on your skin.

Further, since the diameter of the small hole of the sandwiching member is formed smaller than the diameter of the neck portion of the electrode element, the tongue piece becomes long, and the tips of the plurality of tongue pieces are widened and tilted when the head is immersed for mounting.
With its restoring force, the neck can be pressed constantly, and the head of the immersed bioelectrode can be locked to the tip of the tongue to maintain a stable attachment state, improving connection quality. Can be made.

In addition, the sandwiching member may be one sheet, but when a plurality of sandwiching members are stacked, the contact points between the electrode element and the support case increase in parallel to improve electrical conduction, and the spring force increases to fall off. It is difficult and can be held securely.

In addition, the insulating support case can maintain the electrical stability of the derived bioelectric signal by insulating the holding member from the outside.

Further, since the projection is provided on at least a part of the outer periphery of the support case, there is an effect that the lead wire stopper can be easily attached and detached.

[Brief description of drawings]

FIG. 1 is a bottom view showing an embodiment of the present invention, FIG. 2 is a perspective view of a holding member of the same embodiment, FIG. 3 is a side sectional view showing a usage state of the embodiment, and FIG. It is sectional explanatory drawing of the other Example of this invention. 1 ... Support case, 1a ... Protrusion, 2 ... Clamping member, 5 ... Small hole, 6 ... Notch, 7 ... Tongue piece, 8 ... Electrode element, 8a ... Head, 8b ... Neck , 9 ... Element support base, 9a ... Collar part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyoshi Ishii 810 Riken Kumagaya Works, Kumagaya City, Saitama Prefecture (72) Inventor Koichi Ooka 810 Kumagaya City, Kumagaya, Saitama Works Kuken, Ltd. (72 ) Osamu Shirakawa 2-35-8 Hongo Hongo, Bunkyo-ku, Tokyo Fukuda Denshi Hongo Office (72) Inventor Taizen Suzuki 2-35-8 Hongo Hongo, Bunkyo-ku, Tokyo Fukuda Denshi Hongo Office (56) References Actual Kaihei 1-155409 (JP, U) Actual Kohei 5-8971 (JP, Y2)

Claims (4)

[Scope of utility model registration request] 1. A bioelectrode having a projecting head and a neck thereof. At least one sandwiching member that immerses the head and sandwiches the neck, and supports the sandwiching member and covers the sandwiching member. The holding member has an insulating support case, and the holding member has a small hole at the center of the conductive thin plate, and a plurality of notches are formed radially around the small hole to form a plurality of tongue pieces. Is formed to be smaller than the diameter of the neck portion of the bioelectrode, and a protrusion is provided on at least a part of the outer periphery of the support case. 2. The lead wire stopper for a biomedical electrode according to claim 1, wherein the lower end of the support case is in contact with the flange portion of the element supporting base material. 3. The lead wire stopper for a biomedical electrode according to claim 1, wherein a shield plate for electromagnetically shielding the holding member is provided in the support case. 4. The lead wire stopper for a biomedical electrode according to claim 1, wherein the holding member is made of an amorphous metal.