JPH0225367Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a suction electrode pad that is attached to an electrocardiogram suction electrode.

(Prior Art) Adsorption electrodes are generally used as electrodes attached to the chest of a subject to measure an electrocardiogram. This adsorption electrode is shown in FIG. 1 is a cup-shaped electrode portion. A hole is provided in the center of the electrode section 1, and a dropper section 2 is provided so as to suck the air inside the electrode section 1 through this hole. A terminal 3 is further attached to the electrode part 1, and the electrode part 1 is connected via a cord connected to this terminal 3.
electric potential is transmitted to the electrocardiograph.
Conventionally, when attaching this adsorption electrode to a subject, electrode paste was applied to the measurement site to improve adsorption and reduce contact resistance between the skin and the electrode. It was attached through the However, with this method, the work of applying electrode paste to the measurement site of the subject and the work of wiping off the electrode paste after measurement is complicated, and furthermore, if a large amount of paste is used, the paste may spread between each electrode. Short circuits occurred, making it impossible to obtain an accurate electrocardiogram, and the application of electrode paste caused discomfort to the subject. Therefore, recently, an adsorption electrode is used by attaching an electrode pad 4 having conductivity and high elasticity to the electrode portion 1. This electrode pad 4 is dish-shaped as shown in FIG. 7, and its bottom part is wider than the opening and is flat plate-shaped, and the electrode part 1 shown in FIG. It has a shape that covers it. The inner shape of the electrode pad 4 is formed to be slightly smaller than the outer shape of the electrode part 1. Therefore, when attaching the electrode pad 4 to the electrode part 1, the opening 4a of the electrode pad 4 must be pushed wide.
After attachment, its inner surface is brought into close contact with the outer surface of the electrode section 1 due to its own elasticity. Further, a ventilation hole 4b is provided in the bottom wall of the electrode pad 4, as shown in the bottom view of FIG. This ventilation hole 4b
is for communicating the inside and outside of the electrode section 1 when the electrode pad 4 is attached to the electrode section 1.

When using an adsorption electrode to which such an electrode pad 4 is attached, first, the bottom surface of the electrode pad 4 is pressed against the skin of the subject while the dropper portion 2 is pressed. Next, when the pressure on the dropper part 2 is released, the air inside the electrode part 1 is sucked into the dropper part 2. For this reason, the air existing between the bottom surface of the electrode pad 4 and the subject's skin is sucked into the electrode part 1 through the ventilation hole 4b of the electrode pad 4, so that the air existing between the bottom surface of the electrode pad 4 and the subject's skin is sucked into the electrode part 1. It will come into close contact with the bottom of the.

(Problems to be Solved by the Invention) However, the electrode pad 4 as described above has the following drawbacks. FIG. 9 shows a state in which the suction electrode to which the electrode pad 4 is attached is attached to the skin 6 of the subject. As described above, the subject's skin 6 and the bottom surface of the electrode pad 4 come into close contact because the air pressure inside the electrode section 1 is lower than that outside. At this time, the center of the bottom wall of the electrode pad 4 is pushed up by the skin 6. However, since the electrode pad 4 is made of an elastic material, when its bottom wall is deformed, a force is generated that tends to return it to its original state. This force acts to separate the subject's skin 6 and the electrode pad 4. If this force increases, the electrode part 1 becomes easier to separate from the skin 6 against the adsorption force due to the drop in internal air pressure. Therefore, one possibility is to increase the diameter of the ventilation hole 4b. However, as shown in FIG. 10, if the vent hole 4b is made larger, the contact area between the electrode pad 4 and the skin 6 becomes smaller, making it difficult to maintain airtightness inside the electrode part 1. Also,
If the ventilation hole 4b is made larger, the skin 6 and the electrode part 1 will be in direct contact with each other, and if the subject moves, the contact area will change due to the body movement, which may cause noise to be mixed into the output or contact with metal. The polarizing voltage generated between the skin changes, causing the baseline of the signal to fluctuate, making it impossible to detect accurate electrical potentials.

On the other hand, if the electrode pad is formed in a shape that fits most of the inner surface of the cup-shaped electrode part when it is attached, these problems will not occur, but such a shape is difficult to manufacture. and it is not easy to attach it to the electrode part.

The present invention was developed in view of the above-mentioned drawbacks of the conventional technology, and its objectives are to make it easy to manufacture and attach to the electrode part, to reduce the force that acts to separate the adsorption electrode from the subject's skin, and to reduce the force that acts to separate the adsorption electrode from the subject's skin. To provide an electrode pad in which the skin of an examiner does not come into direct contact with the electrode part.

[Structure of the invention] (Means for solving the problem) In the present invention, in the pad for an adsorption electrode that is attached to the cup-shaped electrode part of the adsorption electrode while covering the opening surface of the electrode part, the electrode part A suction electrode pad was manufactured in which the portion covering the opening surface was flat and provided with a plurality of slits so as to form tongues with the peripheral edge of the opening surface as the base.

(Function) When the adsorption electrode with this electrode pad attached to the electrode part is attached to the skin of the subject, the air inside the electrode part is sucked into the dropper part, so that part of the subject's skin swells. At this time, the tongues forming the bottom wall of the electrode pad are separated from each other from the tip due to the swelling of the skin. The bottom wall having such a structure has a greater degree of freedom than a bottom wall having a simple hole, and therefore has less elasticity due to deformation. Therefore, the force that acts to separate the bottom wall from the skin can be reduced. Moreover, since the tongue pieces forming the bottom wall are closely interposed between the skin and the electrode portion so that they do not come into direct contact with each other, contact resistance can be reduced.

(Example) An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of an electrode pad 40 of the present invention, and FIG. 2 is a bottom view of the electrode pad 40. The appearance of the electrode pad 40 of the present invention is substantially the same as the conventional electrode pad 4 shown in FIGS. 7 and 8. The feature of this electrode pad 40 is its bottom wall 41. That is, the bottom wall 41 is provided with a ventilation hole 42 in the center, and linear slits 43a, 43b, 43c, and 43d extending from four points located at a predetermined distance from the periphery of the bottom wall 41 to the ventilation hole 42. It is being The electrode pad 40 is made of a material that is conductive and highly elastic, and is preferably made of a urethane-based hydrous resin, for example.

Next, the operation when this electrode pad 40 is used by being attached to a suction electrode as shown in FIG. 6 will be explained.

First, the examiner presses the bottom wall 41 of the electrode pad 40 against the subject's skin 6 while pressing the dropper part 2, and then releases the pressure on the dropper part 2. At this time, air within the electrode section 1 is sucked into the dropper section 2. Therefore, the air pressure inside the electrode part 1 decreases and the skin 6
Pull it inward and bulge up this skin. For this reason, each tongue piece formed by the slits 43a to 43d is spaced apart from each other from its tip, and its tip rises upward toward the center of the electrode section 1.
This results in a state where the skin is sandwiched between the electrode section 1 and the skin.
The electrode pad 40 in such a state is shown in FIG.

According to this embodiment, since the ventilation hole 42 is also provided, even when the width of the slits 43a to 43d is narrowed, the air present between the skin 6 and the bottom wall 41 can be sufficiently sucked toward the dropper part 2 side. Can be done. However, normally if the skin 6 is slightly raised, the slit 4
3a to 43d are sufficiently opened and the inside and outside of the bottom wall 41 communicate with each other, so that the bottom wall may be provided with only a plurality of slits 44 as shown in FIG. 4. Furthermore, as another example, if the thickness of the side wall covering the cup-shaped electrode is made thinner than the thickness of the bottom wall, the extension will follow the bottom wall that is deformed by the suction action of the dropper. Since this occurs more easily, the adhesion with the skin is further improved and the electrode can be prevented from falling off. In addition, if a ventilation hole is provided, the shape of the ventilation hole is a rectangular prism-shaped ventilation hole 45 as shown in FIG.
Even if it is of other shapes, it has similar effects. In addition, in FIG. 5, the tips of the slits 46a to 46d are connected to the holes 46A to 46 on the cylinder.
It is marked 6D. In this way, slit 4
When a force is applied to spread apart 6a to 46d, their tips become difficult to tear. Furthermore, the number of slits is not limited to the numbers shown in FIGS. 1, 2, 4, and 5.

[Effects of the invention] According to the invention, it is easy to manufacture, easy to attach to the electrode part, has good adhesion to the skin of a living body, and has an adsorption method that does not allow the skin to directly touch the electrode part. An electrode pad can be provided.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the external appearance of the electrode pad of the present invention, Fig. 2 is a bottom view thereof, and Fig. 3 is a perspective view showing the appearance of the electrode pad of the present invention.
4 and 5 are bottom views of electrode pads of other embodiments. The figure is a side view of a suction electrode with an electrode pad attached, Figures 7 and 8 are perspective views and bottom views of a conventional electrode pad, and Figures 9 and 10 are a suction electrode with a conventional electrode pad attached. It is a figure for explaining the action of an electrode. 40...Electrode pad, 41...Bottom wall, 43a~
43d...Slit.

Claims (1)

[Scope of utility model registration request] In a suction electrode pad that is attached to a cup-shaped electrode portion of an electrocardiogram suction electrode in a state that covers an opening of the electrode portion, the portion that covers the opening surface is flat and has a peripheral edge side of the opening surface. A pad for an adsorption electrode, characterized in that a plurality of slits are provided so as to form a tongue piece having a base.