JPH024325A - Organism induction electrode for four limbs - Google Patents

Abstract

PURPOSE:To abut an electrode to a skin surface, to obtain satisfactory conductivity and to prevent polarizing operation and a cold feeling shock by composing an electrode plate of plastic as a base material, executing conductive plating to a surface and providing plural projecting step differences on an abutting surface to a four limbs skin surface. CONSTITUTION:Out of sandwiching parts 1b and 2b of resin-made sandwiching plates 1 and 2 sandwiching the four limbs such as arms or legs, in one sandwiching part 1b, an electrode plate 6 is provided to be engaged at both right and left side edge parts. For this electrode plate 6, a base material A is formed with the plastic, which is an insulating body, unitedly with including side edge engaging parts 6b and 6c and the plating is totally executed to a surface B of the base material A with the metal of satisfactory conductivity. Accordingly, even when the plating is executed to the electrode plate 6, the polarizing operation is not generated. Since the base material A is the plastic which is the defective conductor of heat, even in the case of a low room temperature, when the electrode plate is mounted to a four limbs skin surface M of the organism, the cold feeling shock can be prevented. Further, since plural projecting step difference 12 are provided on an abutting surface 6a of the electrode plate 6, an area brought into contact with the skin surface is enlarged and electric resistance is decreased. Then, the electric conductivity can be made satisfactory in the electrode plate 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bioinduction electrode for limbs, and more specifically, the invention relates to a bioinduction electrode for limbs, and more specifically, a bioinduction electrode is placed in contact with the skin surface of a living limb while holding the living limb, and electrical signals in the living body are detected. Derivation [Prior Art] Generally, bioelectricity generated within a living body is induced by activities of the heart, brain, muscles, etc.

For example, the bioelectricity induced from the heart can be transmitted externally from the surface of the clamped skin via a conductive electrode plate by holding multiple limb bioinduction electrodes around the living body's arms, legs, or other limbs. This derived bioelectrical signal is expressed as a waveform by an electrocardiograph connected to the electrode with a lead wire, and the bioelectrical function is diagnosed by a doctor.

Conventionally, an alloy metal such as nickel silver, which is made of copper, which is a good conductor of electricity, and nickel for stability, has been used for the electrode plate of this bioinduction electrode for limbs.

[Problem to be solved by the invention]

However, in order to bring this electrode plate into contact with the skin of a living body and obtain good conduction, it is necessary to reduce the electrical resistance that occurs on the skin surface, and for this purpose it is necessary to apply an electrolyte cream to the skin surface. there were.

Furthermore, in order to make this electrolyte cream and the electrode plate compatible with living organisms, it has been considered desirable to construct the electrode plate with silver-silver chloride or to plate the surface of the electrode plate with silver-silver chloride.

Constructing the electrode plate from silver-silver chloride would be very expensive;
Since it is not practical, a method using plating has been studied.

However, such electrode plates are composed of two types of metal, a metal base material and a metal plating, and it has been extremely difficult to remove small pinholes with the plating.

When the electrolytic solution, which is a cream applied to the skin surface, penetrates into this pinhole, since the metal base material and the plated metal are different metals, a small battery is partially formed through the electrolytic solution. This causes a so-called polarization effect. Then, the polarization voltage due to the polarization effect is superimposed on the bioelectricity.

Therefore, there was a problem in that the derived bioelectrical signal waveform, which is weak at about 1 millivolt, is superimposed with a much larger polarization voltage, making it impossible to measure it with an electrocardiograph.

In addition, since the base material of the electrode plate is metal, it is heavy, and there is a problem that instability of attachment, such as slipping around the limb on which it is attached, has a negative effect on measurement accuracy. Furthermore, the electrode plate is made of metal, Because it is a good conductor of heat, when electrodes are attached to the extremities of a living body when the ambient temperature is low, the temperature difference causes the body temperature to be rapidly taken away from the skin surface, causing the patient to experience a cold shock and prevent measurement. There were issues such as disturbing the necessary resting state bioelectricity and adversely affecting electrocardiograph measurements.

In addition, the electrode plates are difficult to process because their base material is metal.

The present invention aims to solve such problems.

[Means to solve the problem]

In order to achieve the above object, the present invention provides the following biological induction electrode for limbs. That is, the present invention provides (1) a clamping means for clamping the limbs of a living body; and a clamping means that is attached to the clamping means and contacts the skin surface of the limb of the living body by the clamping means, and guides a weak current generated within the living body to the outside of the body. 1. A bioinduction electrode for extremities, comprising an electrode plate, the electrode plate being made of plastic as a base material, the surface of which is coated with conductive plating.

and (2) the electrode plate has a plurality of convex steps on the surface that contacts the limb skin surface.
This is a bioinductive electrode for limbs.

[For production]

In the above configuration, the clamping means brings the electrode plate into contact with the skin surface of the limb of the living body and maintains the contact state.

Further, the electrode plate contacts the extremities of the living body by the clamping means, and leads out the weak current inside the living body from the contact surface.

Furthermore, since the electrode plate is made of insulating plastic as a base material and its surface is plated, no polarization occurs.

Moreover, the plurality of steps on the electrode plate increases the contact area with the limb surface, increasing conductivity and increasing the frictional resistance with the limb surface.

(Example) Regarding an example 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 perspective view of an embodiment of the present invention, and in the figure, reference numerals 1 and 2 are resin holding plates that hold limbs such as arms and legs;
These clamping plates 1.2 are pivoted by pivot shafts 3.

Further, the clamping plate 1.2 has gripping portions 1a and 2a on the proximal end side of the pivot shaft 3, respectively, and on the distal end side of the pivot shaft 3, the surfaces facing each other are curved in a concave shape. As a result, it has clamping parts 1b and 2b that can cooperate with each other to clamp the limbs of a living body.

A spring 4 is incorporated in the vicinity of the pivot shaft 3, and the spring force of the spring 4 always biases the clamping plates 1 and 2 in a direction in which the distal ends thereof approach each other.

These clamping plates 1, 2, pivot shaft 3, spring 4, etc. are clamping means 5.
Configure.

Moreover, among the pair of clamping parts 1b and 2b of the clamping parts Vi, 1.2, one clamping part 1b is provided with an electrode plate 6 that engages with both left and right side edges.

When the gripping portions 1a and 2a are pressed against each other with fingers, the gripping portions 1b and 2a move against the spring 4 around the pivot shaft 3,
2b opens, and when the pressure of the finger is released, the restoring force of the spring 4 closes both clamping parts 1b and 2b, allowing them to clamp the skin of an extremity or the like.

The spring 4 is a band-shaped curved spring made of steel whose ends 4a and 4b are biased toward each other, and the spring 4 is a band-shaped curved spring made of steel whose ends 4a and 4b are biased toward each other. 4a and 4b at both ends of the spring 4 pass through the formed through holes 1c and 2c, and the clamping plate 1 passes through the formed through holes 1c and 2c.
．． Multiple engagement grooves 1d and 1 symmetrically provided on the outside of 2
selectively engages e, If and 2d, 2e, 2f.

Here, the two ends 4a, 4 of the spring 4 are selectively selected.
The position of the engagement groove where b engages is at a stepwise distance from the pivot shaft 3, and the one further from the pivot shaft 3 can have a stronger clamping force than the one closer. By selecting one of the plurality of engagement grooves, the desired clamping force can be adjusted and set to adapt to the patient's limb thickness, physical strength, and other conditions.

FIG. 2 is a perspective view of the electrode plate 6 of the same embodiment, and in the figure, 6
A is a contact surface that comes into contact with the skin surface of the living body's limbs and derives bioelectricity.

At both ends of this contact surface 6a, a pair of side edge engaging portions 6b and 6c are provided in a rising shape for engaging with the left and right side edges of the clamping portions 1b and lb of the clamping plate 1 shown in FIG. established,
The clamping portion 1 of each inward protrusion 6d, 6d
b, 2b.

Among the pair of side edge engaging portions 6&, 6c, one side edge retaining portion 6c has a terminal holding portion 6e in which a terminal of a lead wire 7 to a measuring instrument such as an electrocardiograph can be connected in a pinched manner. It is set up in a shape.

This terminal holding part 6e is provided at a position apart from the contact surface 6a, but this is because if cream, which is an electrolytic solution applied to the skin surface of the extremities, should come into contact with the terminal holding part 6e, This is because there is a possibility that a polarization effect may occur through the electrolyte and disturb bioelectrical signals.

The most significant feature of this electrode plate 6 is that the side edge engaging portions 6b, 6
The base material A including c is integrally formed of plastic, which is an insulator, and the surface B of the integrally formed base material A is plated at once with a highly conductive and stable metal, such as silver silver chloride. It's in the structure.

Since the base material A is an electrically insulating plastic, no polarization occurs even when the electrode plate 6 is plated.

Therefore, no polarization effect of the derived bioelectricity occurs.

Therefore, the derived bioelectrical signal waveform can be accurately transmitted to an electrocardiograph or the like without being disturbed.

Even if the base material A is an insulator, by plating the surface B, the electrode plate 6 can have the electrical function of a metal.

In addition, since the base material A is made of plastic, which is a poor conductor of heat, even when the room temperature is low, when it is attached to the skin surface M of the limbs of a living body, there is no possibility of rapidly depriving the patient's body temperature, so it does not cause a cold shock. This allows measurements to be taken smoothly while at rest.

Furthermore, since the base material A is made of plastic, the electrode plate 6
It is lighter than metal, and measurements can be made while keeping it in a stable state.

Furthermore, since the base material A is made of plastic, it is freed from restrictions on manufacturing shapes and allows for free design.

FIG. 3 is a diagram showing the usage state of the same embodiment, in which the limb electrodes are held by the holding means 5 on the skin surface M of the arms and legs of the living body, are led to the relay part 8 by the lead wire 7, and are further bundled. It is connected to an electrocardiograph 10 by a line 9.

At the same time, each limb electrode is connected to the display 11 by the lead wire 7.
can be connected to display the signal waveform.

FIG. 4 shows another embodiment of the present invention, and is a perspective view for explaining the contact surface 6a of the electrode plate 6. FIG.

This other embodiment differs from the first embodiment in that a plurality of convex steps 12 are provided on the contact surface 6a of the electrode plate 6.

This is because the base material is plastic, which is easy to process, and takes advantage of its characteristics.
This increases the contact area with the skin surface, reduces electrical resistance, and improves electrical conduction in the electrode plate 6.

Moreover, since the plurality of convex steps 12 increase the frictional force, the mounted state can be stably maintained.

As explained above, the present invention is composed of, for example, a clamping means 5 and an electrode plate 6, and the clamping means 5 has a structure for easily clamping limbs, and the electrode plate 6 attached for the limb is By using plastic as the base material and applying metal plating to its surface, it is possible to prevent polarization, reduce thermal conductivity to prevent cold shock, stabilize the attachment due to its light weight, and facilitate processing. It can be made into a limb-type bioinductive electrode having the following characteristics.

〔Effect of the invention〕

As described above, according to the present invention, since the base material of the electrode plate is plastic, which is an insulator, there is no polarization effect, so the derived bioelectrical signal waveform is faithfully transmitted to the electrocardiograph as it is, and the doctor's diagnosis can be carried out. Be accurate.

In addition, since the base material of the electrode plate is plastic with low thermal conductivity, it is difficult to absorb heat from the skin, which reduces the cold sensation caused by the temperature difference between the electrode plate and the skin when worn.
It is possible to eliminate adverse effects on electrocardiograms that should be measured in a resting state.

Furthermore, since the base material of the electrode plate is light plastic, it does not slip off from the part where the limb is attached, so the stability of the attached state can be ensured.

In addition, the base material of the electrode plate is plastic, which makes it easy to process, and the surface in contact with the skin has multiple convex steps, which improves conductivity by increasing the contact area and reduces frictional resistance. There are effects such as the ability to further increase the stability of the wearing state due to the increase.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a perspective view of an electrode plate of the embodiment, Fig. 3 is a diagram showing how the embodiment is used, and Fig. 4 is a perspective view of an embodiment of the invention. It is a figure which shows another Example. 5... Holding means, 6... Electrode plate, 6a... Contact surface, 12... Step, A... Electrode plate Base material, B...Surface of A, M...Skin surface of living limb. Applicant: Fukuda Denshi Co., Ltd. and 1 other person Figure 1te

Claims (2)

[Claims] (1) A clamping means for clamping the limbs of a living body, and an electrode plate attached to the clamping means and brought into contact with the skin surface of the limb of the living body by the clamping means to lead out the weak voltage generated within the living body to the outside of the body. 1. A bioinduction electrode for extremities, characterized in that the electrode plate has a plastic base material and conductive plating is applied to the surface thereof. (2) The electrode plate has a plurality of convex steps on the surface that contacts the limb skin surface.
bioinductive electrodes for limbs.