JPH0117289Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a bioelectrical measurement electrode used in an electrocardiograph or the like, and in particular to a clip-type electrode for an electrocardiograph.

[Prior art]

Conventionally, electrocardiographs have been widely used to diagnose heart abnormalities. This electrocardiograph, for example, derives minute currents induced on the skin surface of the human body to an external electrocardiograph.
Cardiac abnormalities were diagnosed by measuring the amount of potential changes occurring in the human body using an electrocardiograph.

This method of measuring potential changes using an electrocardiograph is explained in the first section.
To explain according to the figure, 1 is an electrocardiograph, a conductive tube 2 is led from this electrocardiograph 1 to a power distribution device 3, and from this power distribution device 3 four conductor cords 4 ₁ , 4 ₂ , 4 ₃ , 4 ₄ is distributed, and these four conductor cords 4 ₁ , 4 ₂ , 4 ₃ ,
4 ₄ is a clip-type electrode 5 ₁ which is held between the limbs of a patient lying on the bed, such as the wrist and ankle.
It is connected to one end of each of 5 ₂ , 5 ₃ , and 5 ₄ .
At the other end of this clip-type electrode 5 there is a conductor cord 6 ₁ ,
One ends of the conductor cords 6 ₂ , 6 ₃ , 6 ₄ are connected, and the other ends of the conductor cords 6 ₁ , 6 ₂ , 6 ₃ , 6 ₄ are connected to the display 7 .

In this way, clip-type electrodes are held around the wrists, ankles, etc. of the human body, and the waveforms displayed on the display 7 are visually recognized to diagnose heart abnormalities.

By the way, when taking an electrocardiogram in this way, a clip-type electrode 5' is attached to the human body's wrist, ankle, etc., as shown in Figure 2, but the wrist and ankle are not completely cylindrical but tapered in the longitudinal direction. The cross-sectional shape is not a perfect circle, and the size varies.

A conventional electrode attached to the wrist or ankle will be described with reference to FIG. 2. Reference numerals 8 and 8' denote a pair of clamping plates of the clip-type electrode 5' which are engaged at a fulcrum. An electrode plate 9 is fixed to the inside of one of the clamping plates 8 and 8' with a nut (not shown), and 10 and 10' are terminals for connecting a conductor cord (not shown). . In the clip-type electrode 5' having such a structure, the holding plates 8, 8' have no elasticity.
Moreover, since the electrode plate 9 is fixed to the clamping plate 8,
When this kind of clip-type electrode 5' is held between an ankle or wrist, only about half of the electrode plate 9 comes into contact with the outer surface of the living body M, and the distance between the electrode plates 9 and 5' increases due to the fact that the shapes of the wrists and ankles are not uniform. S is generated and it floats. As a result, the contact resistance between the clip-type electrode 5' and the living body M increases, resulting in disadvantages such as distortion of the electrocardiogram and induction disturbance.

[Structure and purpose of the invention]

Therefore, this invention was devised in view of the above-mentioned circumstances.
There are gripping parts 14 and 15 on the proximal side of the pivot shaft 11, and gripping parts on the distal side of the pivot shaft 11 that cooperate with each other to hold the limbs of the living body. 16, 17, and a pair of clamping plates 12, 13 which are urged in a direction in which the distal ends always approach each other by a spring force incorporated in the pivot shaft 11, and the pair of clamping plates The terminal holder 19 is provided with a terminal holder 19 that engages with the left and right side edges of one of the clamping parts 16 of the clamping parts 12 and 13, and this terminal holder 19 is connected to the pair of clamping plates 1.
2 and 13, and press-contact plate part 20 that is pressed against the limb of the living body during use;
left and right side edge engaging portions 21 and 22 that stand up from both left and right edges of the holding plate 12 and resiliently press against the left and right side edges of the one holding plate 12; One of the parts 21 and 22 has a dot-like first part 21 that protrudes toward the other side edge engaging part 22 at a position a certain distance from the pressure contact plate part 20.
It has a dot-like second inward protrusion 27 at a position further apart from the pressure contact plate part 20 by a certain distance from the dot-like first inward protrusion 26. Further, the terminal 25 is held at the rising tip part, and the other 22 of the pair of side edge engaging parts 21 and 22 is connected to the other side edge at a position a certain distance from the pressure contact plate part 20. It has a dot-shaped first inward protrusion 35 that protrudes toward the engaging part 21 side, and is spaced a certain distance further from the pressure contact plate part 20 than the first dot-like inward protrusion 35. an electrode rod supporting tongue piece 29 having a point-shaped second inward protrusion 36 at the position thereof, and further forming engagement holes 29a, 30a, 31a at the rising tip portion for inserting the electrode rod 33; 30, 31, and the terminal holder 19 has the dot-like first inward protrusions 26, 35 and the dot-like second inward protrusions 27, 36. The electrocardiogram is configured to engage the left and right edges of the clamping plate 12 and to be rotatable about the left and right edges of the clamping plate 12 relative to the other clamping plate 13. The main purpose of this invention is to provide a clip-type electrode for measurement, which allows the electrode to make good contact with the skin surface of a living body, and which allows the electrode to be arbitrarily selected according to changes in the part to be held. It is.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a perspective view showing an example of a clip-type electrode based on the present invention. In the figure, reference numerals 12 and 13 denote a pair of holding plates for the clip-type electrode 5, which are connected to each other by a pivot shaft 11 at their base ends. It is pivotally supported. The clamping plates 12 and 13 are provided with gripping portions 14 and 15 on the proximal end side of the pivot shaft 11, and the gripping portions 14 and
The outer surface of 15 has an uneven surface to prevent the hand from slipping.

Further, on the distal end side of the pivot shaft 11, there are clamping portions 16 and 17 that cooperate with each other to clamp limbs of a living body, such as wrists, ankles, etc., and a spring 18 incorporated in the pivot shaft 11 is provided. The distal ends of the clamping plates 12 and 13 are always urged toward each other by the spring force, and the clamping parts 16 and 1
An uneven surface is formed on the inside of 7 to prevent the part to be held from slipping when the part to be held is held.

A terminal holder 19 is engaged with the left and right edges of one of the pair of clamping plates 12 and 13, which induces a potential generated from the living body.
This terminal holder 19 is a metal conductor, and as shown in Fig.
a substantially rectangular flat pressure contact plate 20 which is placed between them and is pressed against the limbs of the living body during use; It is composed of a pair of side edge engaging portions 21 and 22 that are elastically pressed against the side edge engaging portions 21 and 22.

One side edge engaging portion 21 of the pair of left and right side edge engaging portions 21, 22 has a rising plate portion 2.
A top plate part 24 is formed by bending the upper end of 3 inward parallel to the pressure contact plate 20, and a terminal 25 is provided protruding from the approximate center of this top plate part 24, and one end of the conductive wire cord is connected to this terminal 25. and the other end of the conductor cord is connected to the display. Further, on the inside of the rising plate part 23, there is a dot-shaped first inward protrusion part 26 that protrudes toward the other side edge engaging part 22 at a position a certain distance from the pressure contact plate part 20. It is prominent. A dot-like second inward protrusion 26 is located at a certain distance away from the pressure contact plate 20 than the dot-like first inward protrusion 26 .
An inwardly protruding portion 27 is provided to protrude inside the rising plate portion 23.

The other side edge engaging portion 22 of the side edge engaging portions 21 and 22 is separated from each other by slits 34 and 34' having engagement holes 29a, 30a, and 31a at the tip of the rising plate portion 28. Three supporting tongue pieces 29, 30, 31 are formed. Engagement holes 2 formed in the support tongue pieces 29, 30, 31
A cord 32 is connected to the proximal end of each of 9a, 30a, and 31a, and when an electrode rod 33 whose other end is connected to an electrocardiograph is inserted, the supporting tongue piece 2
The central support tongue piece 29 among 9, 30, 31 is
Since the electrode rods 33 inserted into the engagement holes 29a, 30a, 31a are pushed by the support tongues 29 and are easily pushed into the engagement holes because they are biased outward compared to the other support tongues 30, 31. It is designed so that it does not come off from 29a, 30a, and 31a. Furthermore, the rising plate part 28
On the inside thereof, there is a dot-like first inward protrusion 26 that protrudes from the rising plate part 23 of the other side edge engaging part 21 at a position a certain distance from the pressure contact plate part 20. Point-shaped first inward protrusions 35 protrude toward the other side edge engaging portion 21 so as to face each other. A position further apart from the pressure contact plate part 20 by a certain distance than the dot-like first inward protrusion 35, that is, above the dot-like first inward protrusion 35, is located on the other side edge. The other side edge engaging portion 2 is opposite to the point-shaped second inward protruding portion 27 protrudingly provided on the rising plate portion 23 of the joint portion 21 .
A dot-like second inward protrusion 36 protruding toward 1
is installed protrudingly.

As shown in FIG. 3, this terminal holder 19 includes dot-like first inward protrusions 26, 35 and dot-like second inward protrusions 27, 36, The left and right side edges 12 of can be held.

Next, to explain how to use the clip-type electrode 5 having the above configuration, the terminal holder 1 shown in FIG.
9, the left and right side edge engaging parts 21, 22 are slightly expanded outward, and as shown in FIG. After the first inward protrusions 26, 35 and the point-like second inward protrusions 27, 36 engage with both side edges of the holding plate 12, the clip-type electrode 5 is attached to the wrist or ankle. . Then, the terminal holder 19 is rotated as indicated by the arrows c, c', d, and d' according to the shape of the wrist, ankle, etc., so that the terminal holder 19 is brought into sufficient contact with the portion to be held.

[Effect of idea]

As described above, according to the present invention, the first and second inward protrusions are provided in a protruding manner on both side edge engaging portions of the terminal holder that engages with one of the clamping plates, and these inward protrusions are formed into dot-like shapes. Since the terminal holder is formed so that it can be engaged with the clamping plate and rotated relative to the other clamping plate about the clamping plate as an axis, the terminal holder can be brought into sufficient contact with the surface of the living body depending on the shape of the living body. As a result, the electrocardiogram is not distorted or lead disturbance occurs, so it is effective in cardiac diagnosis.

Further, since the terminal holder is elastically formed, it has the advantage that it can be easily attached to the holding portion.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an explanatory diagram showing how a clip-type electrode is used; FIG. 2 is an enlarged cross-sectional view of a main part showing how a conventional clip-type electrode is used; FIG. 3 is a perspective view showing an example of the clip-type electrode of the present invention, FIG. 4 is a perspective view of an example of the terminal holder of the present invention, and FIG. 5 is an explanatory diagram showing the state in which the clip-type electrode is used. 5...Clip type electrode, 11...Pivot shaft, 1
2, 13... Holding plate, 16, 17... Holding part, 2
1, 22... Side edge engaging portion, 26, 35... Dot-shaped first inward protrusion, 27, 36... Dot-shaped second inward protrusion, 29, 30, 31... Electrode rod support tongue pieces, 29a, 30a, 31a...engaging holes.

Claims (1)

[Scope of utility model registration request] mutually pivotally supported on a pivot shaft 11;
It has gripping parts 14 and 15 on the proximal end side, respectively, and gripping parts 16 and 17 on the distal side of the pivot shaft 11, respectively, for cooperating with each other to grip the limbs of the living body. and a pair of clamping plates 1 whose distal ends are always urged in a direction toward each other by a spring force built into the pivot shaft 11.
2, 13, and a terminal holder 19 that engages with the right and left side edges of one of the clamping parts 16 of the pair of clamping plates 12, 13, and this terminal holder 19 A press-contact plate part 20 is disposed between the clamp plates 12 and 13 and presses against the limbs of the living body during use, and the one clamp plate 12 stands up from the left and right edges of the press-contact plate part 20.
The pair of side edge engaging portions 2 have left and right side edge engaging portions 21 and 22 that are elastically pressed against the left and right side edge portions of the pair of side edge engaging portions 2.
One 21 of 1 and 22 has a dot-shaped first inward protrusion 26 that protrudes toward the other side edge engaging portion 22 at a position a certain distance from the pressure contact plate portion 20. , has a dot-shaped second inward protrusion 27 at a position further apart from the pressure contact plate part 20 by a certain distance than the dot-shaped first inward protrusion 26, and further has a terminal 25 at the rising tip. The other 22 of the pair of side edge engaging portions 21 and 22 is connected to the pressure contact plate portion 20.
It has a dot-shaped first inward protrusion 35 that protrudes toward the other side edge engaging part 21 at a position a certain distance from Furthermore, it has a dot-shaped second inward protrusion 36 at a position a certain distance away from the pressure contact plate part 20, and further has an engagement hole 29 for inserting the electrode rod 33 at the rising tip.
The terminal holder 19 has electrode rod supporting tongues 29, 30, and 31 forming electrode rod supporting tongues 29, 30a, and 31a.
35 and the point-shaped second inward protrusions 27 and 36
It is configured to engage with the left and right side edges of the holding plate 12 and to be able to rotate freely relative to the other holding plate 13 about the left and right side edges of the holding plate 12 as an axis. , clip-type electrode for electrocardiograph.