JPH09271467A - Electrode for living body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of defective articles by forming an electrode in such a manner as to facilitate the sticking of this electrode to the skin and the stripping of the electrode from the skin and to obviate the occurrence of the peeling of a pad, the adhesion of this pad to an unnecessary part, etc., during producing, product storing and handling. SOLUTION: This electrode for the living body is formed by adhering a release paper 22 to the tacky adhesive surface of the pad 21 of a non-woven fabric tacky adhesive tape provided with an electrode part 3. A resin film 30 is thermally press bonded to the front side surface of the pad 21 so as to extend outward from the outer edge of the pad 21 so that the pad is easily peeled by pinching the front end 30a of this resin film 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biomedical electrode used for taking out an electric signal of a living body to an electrocardiograph, an electromyography meter, etc. The present invention relates to a biomedical electrode.

[0002]

2. Description of the Related Art A biomedical electrode is a pad made of an adhesive tape provided with an electrode portion. By attaching the adhesive surface of the pad to the skin surface of a human body or the like, the electrode portion is brought into contact with the skin surface. It is fixed in a state and is used for recording and diagnosing an electrocardiogram, etc. by detecting an electric signal from the heart etc. from the skin surface.

There are two types of biomedical electrodes that can be repeatedly used and ones that are disposable type that can be replaced only once. The present invention belongs to the latter.

As a method of fixing a disposable type biomedical electrode to the skin, a method of using a pad made of an adhesive tape such as a non-woven fabric is generally used. However, in order to stably record an electrocardiogram and the like, A strong adhesive tape may be used, or a thin adhesive tape may be used to reduce discomfort after being attached to the skin. The pad made of an adhesive tape normally passes through the manufacturing process in a state of being attached to a release paper as a mount, and is handled and stored in that state until just before use. If you actually try to use the biomedical electrode by peeling off the pad from the release paper, or if you do not have any ideas for the pad or release paper, if the pad is thin, you can hook it with your fingernail to remove it. It is difficult to handle, and when it is attached to the skin and peeled off from the skin after use, it is more difficult and troublesome.

Conventionally, the following first to third conventional examples have been proposed so that the pad can be easily peeled off from the release paper.

In FIGS. 5 and 6, the first of the biomedical electrodes of this type is shown.
A conventional example will be described. In these figures, reference numeral 1 is a pad made of an adhesive tape, and a release paper 2 having a larger outer dimension is attached to the adhesive surface of the pad 1.
The pad 1 has, for example, a circular shape, and the electrode portion 3 is provided at the center thereof.
Is provided. The electrode portion 3 is a hook-shaped outer electrode portion (connection electrode portion) 3 a provided on the front side of the pad 1.
And an inner electrode portion 3b arranged on the back side (adhesive surface side) of the pad 1. The outer electrode portion 3a can utilize its hook shape to connect a connector with a lead wire to a measuring instrument. The inner electrode portion 3b penetrates the pad 1 and fits inside the outer electrode portion 3a,
A conductive fixing member 4 (for example, a resin surface plated with a metal such as silver) and an elastic conductive member provided in a conductive gel form in which a sponge is impregnated with an electrolyte so as to cover the fixing member 4. The elastic conductor 5 and the outer electrode portion 3a are electrically connected to each other via the conductive fixing member 4. The elastic conductor 5 is a portion that contacts the skin when the pad 1 is attached to the skin. A portion of the release paper 2 corresponding to the inner electrode portion 3b is a hole 6, and the elastic conductor 5 is covered with a resin cover 7 adhered to the peripheral portion of the release paper 2 hole 6. ing. Further, in order to make it easier to peel the pad 1 from the release paper 2, the cut line 8
The release paper 2 is divided into a portion 2a and a portion 2b.

In the first conventional example, the portion 2b of the release paper 2 is
By peeling off, the end of the pad 1 can be easily grasped later, and the entire pad 1 can be peeled off from the release paper 2.

FIG. 7 shows a second conventional example, and the same or corresponding parts as those of the first conventional example are designated by the same reference numerals. In this case, the non-adhesive sheet 9 is attached to the end of the adhesive surface of the pad 1 formed of an adhesive tape, and the pad 1 can be easily peeled off from the release paper 2 using this portion. There is.

FIG. 8 shows a third conventional example, in which the same or corresponding parts as those in the first conventional example are designated by the same reference numerals. In this case, the outer electrode portion (connection electrode portion) 3 a of the electrode portion 3 provided in the central portion of the pad 1 is bonded to the pad 1 by attaching a resin member 11 with a flange that holds down the conductive ferrite 10 to the pad 1. The structure is fixed to 1. The structure that facilitates the peeling of the pad 1 from the release paper 2 is the same as in the first conventional example.

In the third conventional example, the conductive ferrite 1
It can be connected to a measuring instrument by using a connector having a conductive permanent magnet attracted to 0 and a lead wire.

[0011]

By the way, in the case of the first conventional example shown in FIG. 5 and FIG. 6, if the portion 2b of the release paper 2 is accidentally peeled off during the manufacturing process or during the handling before the use of the product, the pad 1 will be removed. The exposed adhesive surface adheres to unnecessary portions and causes various troubles (for example, a defective product becomes unusable). In addition, after putting the pad 1 on the skin, there is no effect of making the pad 1 easy to peel off, and it takes time to peel it off from the skin.

In the case of the second conventional example shown in FIG. 7, the release paper 2
Although it can be easily peeled off, it may be caught during the manufacturing process or during attachment to the skin, causing unnecessary peeling. For example, there is a problem in that when it is attached to the skin, it may become entangled in clothing and gradually come off, and the like.

Further, in the case of the third conventional example of FIG. 8, since the resin member 11 with the flange is used for fixing the conductive ferrite 10, the area of the inflexible and hard portion is increased and it is compatible with the skin. Is bad, and it tends to cause discomfort when applied to the skin. Further, the relationship between the pad 1 and the release paper 2 attached to it is the same as in the first conventional example,
It has the same drawbacks as the first conventional example.

It should be noted that, as in the case of the first or third conventional example, the applicant of the present invention cuts the release paper 2 along the cut line 8 into a portion 2a and a portion 2a.
Instead of dividing into b and b, a cutout is formed in the outer edge of the release paper that does not reach the pad portion, and the cutout is used to break the release paper to facilitate peeling of the pad. No. 60-102004, the workability of peeling the pad from the release paper is poor in this case, and it is not effective when peeling from the skin after use.

In view of the above points, the present invention is easy to attach to and peel off from the skin of a living body, and at the time of manufacturing,
An object of the present invention is to provide a biomedical electrode in which the pad does not peel off during product storage and handling and does not adhere to unnecessary parts, and does not cause defects during manufacturing or storage.

Other objects and novel features of the present invention will be clarified in the embodiments described later.

[0017]

In order to achieve the above object, the present invention relates to a biomedical electrode in which a release paper is applied to the adhesive surface of a pad provided with an electrode portion, and is placed outside the outer edge of the pad. A resin film is adhered to the front side surface of the pad so as to extend to the.

Further, it is preferable that the resin film has a coating of a thermoplastic resin and is thermocompression-bonded to the pad.

It is preferable that a cutout is formed in the release paper so that the tip of the resin film extending outside the outer edge of the pad is located in the cutout.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a biomedical electrode according to the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention. In these figures, reference numeral 21 is a pad made of a non-woven fabric adhesive tape, and a release paper 22 having a larger outer dimension is attached to the adhesive surface of the pad 21. The release paper 22 is formed with a cutout portion 22a which is formed by cutting out a part of the outer edge portion in a substantially arc shape or a substantially elliptic arc shape. Further, a cutout portion 21a corresponding to the cutout portion 22a is also formed in a part of the outer edge portion of the pad 21, so that the pad 21 does not protrude from the release paper 22.

The resin film 30 adhered to a part of the outer edge portion of the front surface of the pad 21 (dotted line area in FIG. 1) to facilitate peeling of the pad 21 is made of PET (polyethylene terephthalate) or the like. The heat-resistant resin film is a uniform coating of polyethylene as a thermoplastic resin, a hot-melt adhesive or the like (coating at least the surface facing the pad 21), and is formed in an elongated partial circular shape. Adhesion of the partially circular resin film 30 to the pad 21 is performed by thermocompression bonding using a thermoplastic resin coating (pressing the resin film 30 against the pad 21 at a predetermined pressure and heating to melt the thermoplastic resin). Adhesive). At this time, the tip end 30a of the resin film 30 extends outside the outer edge of the pad 21 and is positioned inside the notch 22a of the release paper 22 (do not protrude from the side edge of the release paper. desirable).

A resin film 31 coated with a thermoplastic resin is also thermocompression-bonded to the center of the pad 21 for reinforcement, and the same electrode portion 3 as that of the first conventional example is provided here. Has been. The electrode portion 3 includes a hook-shaped outer electrode portion (connection electrode portion) 3a provided on the front side of the pad 21 and an inner electrode portion 3b arranged on the back side (adhesive surface side) of the pad 21. The inner electrode portion 3b penetrates the pad 21 and the resin film 31, and the outer electrode portion 3a.
A conductive fixing member 4 which is fitted inside of the fixing member 4 to fix the outer electrode portion 3a, and an elastic conductor 5 which is provided in a conductive gel form in which a sponge is impregnated with an electrolyte so as to cover the fixing member 4. Therefore, the elastic conductor 5 and the outer electrode portion 3a are electrically connected via the conductive fixing member 4. The part of the release paper 22 corresponding to the inner electrode portion 3b is a hole 26, and the elastic conductor 5 is covered with a resin cover 27 adhered to the peripheral edge of the hole 26 of the release paper 22. ing. As the resin film in this embodiment, a general pressure-sensitive adhesive tape can be used.

In the first embodiment, when the fingers are brought into the notch 22a of the release paper 22, the tip 30a of the resin film 30 (the portion protruding outward from the outer peripheral edge of the pad) is easily caught, and Since the tip end 30a has no tackiness at room temperature, it does not adhere to the release paper, and the pad 21 can be easily peeled off from the release paper 22 by pinching the tip end 30a. When the pad 21 is attached to the skin, the elastic conductor 5 is in contact with the skin. When the pad 21 is peeled off from the skin after use, the resin film 3
Since the tip 30a of 0 does not adhere to the skin, the tip 30a can be easily peeled off by pulling the tip 30a. That is, the pain of the subject to be peeled off by putting nails on the skin is alleviated, and the peeling work of the pad 21 is simplified.

According to the first embodiment, the following effects can be obtained.

(1) Peeling the pad 21 from the release paper 22 before use and peeling the pad 21 from the skin after use by pulling the tip 30a of the resin film 30 thermocompression bonded to the pad 21 Can be performed easily and smoothly.

(2) A notch 22a is formed on the release paper 22 so that the tip 30a of the resin film 30 extending outward from the outer edge of the pad 21 is located in the notch 22a. It is possible to prevent the occurrence of defects such as the tip 30a being caught and peeled off during manufacturing, storage and handling, and it is possible to facilitate manufacturing and handling. Further, by adhering the resin film 30 having a slender partial circular shape along the circular outline of the pad 21, it is possible to prevent unnecessary peeling when it is attached to the skin not only during manufacturing or storage, but also during use. It can also be prevented from being caught.

(3) A non-woven adhesive tape is used by using, as the resin film 30, a heat-resistant resin film such as PET (polyethylene terephthalate) uniformly coated with polyethylene as a thermoplastic resin, a hot melt adhesive or the like. It can be easily and surely integrated with the putt 21 by thermocompression bonding, the production is easy, and the adhesive strength of the resin film 30 to the putt 21 can be increased.

(4) When the resin film used in the central portion is a general pressure-sensitive adhesive tape, the release paper usually provided is discarded during the assembly process, but the resin film 31 coated with a thermoplastic resin is used. When used, release paper becomes unnecessary, and resource saving and cost reduction can be expected.

3 and 4 show a second embodiment of the present invention. In this case, the resin film 40 adhered onto the pad 21 for facilitating the peeling of the pad 21 from the release paper 22 is a heat-resistant resin film such as PET made of polyethylene as a thermoplastic resin or a hot melt adhesive. Etc. are evenly coated, and the pad 21
It has a central reinforcing portion 41 arranged in the central portion and a tongue portion 42 extending radially from the central reinforcing portion 41. The resin film 40 is bonded to the pad 21 by thermocompression bonding using a thermoplastic resin coating. On this occasion,
The tip 42a of the tongue 42 of the resin film 40 extends outside the outer edge of the pad 21 and is located in the cutout 22a of the release paper 22.

The outer electrode portion (connection electrode portion) of the electrode portion 23 provided in the central portion of the pad 21 is composed of a disk-shaped conductive ferrite 50.
A hot-melt adhesive or the like as a thermoplastic resin is applied in a ring shape on the bottom surface of the resin in advance and coated, so that the central reinforcing portion 41 of the resin film 40 is thermocompression-bonded (heated, pressed and bonded). The inner electrode portion arranged on the adhesive surface side of the pad 21 is composed of a conductive gel elastic conductor 25 in which a sponge is impregnated with an electrolyte. In addition, the sponge is polyethylene treated with the resin film 40,
The effect that the resin film 40 can be easily fixed by thermocompression bonding with a hot melt adhesive or the like is also obtained. Here, a hole 26 slightly larger than the outer diameter of the elastic conductor 25 is formed in the pad 21 and the release paper 22, and the elastic conductor 25 is provided on the back side of the central reinforcing portion 41 of the resin film 40. . A hole 43 is formed in the center reinforcing portion 41, and the conductive ferrite 50 as an outer electrode portion and the elastic conductor 25 as an inner electrode portion are mutually passed through the elastic conductor 25 that has entered the hole 43. It is electrically connected. The elastic conductor 25 is covered with a resin cover 27 adhered to the peripheral portion of the punched hole 26 of the release paper 22.

The shapes of the notch 21a of the pad 21 and the notch 22a of the release paper 22 may be the same as those in the first embodiment.

Also in the second embodiment, when the fingers are brought into the notch 22a of the release paper 22, the tongue 42 of the resin film 40 is easily caught by the tip of the tongue 42 and the tip 42a is pinched. 21 can be easily peeled off from the release paper 22 and can be easily peeled off by pulling the tip of the tongue piece portion 42 of the resin film 40 after being applied to the skin.

Further, the resin film 40 has the central reinforcing portion 41.
Since it has a shape having, the conductive ferrite 50, which is the outer electrode portion of the electrode portion 23, can be easily and reliably fixed thereto by thermocompression bonding. Therefore, the flanged resin member 11 for fixing the ferrite described in the third conventional example of FIG. 8 is unnecessary, the number of parts can be reduced, and moreover, the flexibility of the pad 21 can be ensured and the conformability to the skin can be improved. You can Other functions and effects are similar to those of the above-described first embodiment.

In the first embodiment shown in FIGS. 1 and 2, the outer electrode portion (connection electrode portion) of conductive ferrite is used instead of the electrode portion having the hook-shaped outer electrode portion (connection electrode portion) 3a. The electrode portion structure having In addition, in the second embodiment shown in FIGS. 3 and 4,
Instead of the electrode portion having the outer electrode portion of the conductive ferrite 50, an electrode portion structure having a hook-shaped outer electrode portion may be used.

Although the embodiments of the present invention have been described above, it is obvious to those skilled in the art that the present invention is not limited to the embodiments and various modifications and changes can be made within the scope of the claims. There will be.

[0037]

As described above, according to the biomedical electrode of the present invention, in the structure in which the adhesive surface of the pad provided with the electrode portion is coated with the release paper, the pad extends outside the outer edge of the pad. Since the resin film is adhered to the front surface of the pad as it is, the pad can be easily peeled from the release paper by pinching the tip of the resin film, and the skin can be peeled off even after use by pulling the tip of the resin film. The peeling of the putt from the can be easily performed. Further, it is easy to manufacture, and it is possible to prevent occurrence of defects during manufacturing, storage and handling.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a perspective view of a biomedical electrode according to a first conventional example.

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a side sectional view of a biomedical electrode according to a second conventional example.

FIG. 8 is a perspective view of a biomedical electrode according to a third conventional example.

[Explanation of symbols]

 1,21 Pad 2,22 Release Paper 21a, 22a Cutout 3,23 Electrode 3a Outer Electrode 3b Inner Electrode 4 Conductive Fixing Member 5,25 Elastic Conductor 6,26,43 Hole 10,50 Conductivity Ferrite 30, 31, 40 Resin film 30a, 42a Tip 41 Center reinforcement 42 Tongue

Claims (3)

[Claims] 1. A biomedical electrode comprising a pad provided with an electrode portion and a release paper applied to the adhesive surface of the pad, wherein a resin film is adhered to the front surface of the pad so as to extend outward from the outer edge of the pad. A biomedical electrode characterized by the above. 2. The biomedical electrode according to claim 1, wherein the resin film has a thermoplastic resin coating and is thermocompression bonded to the pad. 3. A cutout is formed in the release paper,
The tip of the resin film extending outward from the outer edge of the pad is located in the notch.
The biomedical electrode described.