JPH0117287Y2 - - Google Patents

Description

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

(Prior Art) 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.
Heart 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 conductor 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 shows the limbs, wrists, and limbs of a patient lying on the bed.
Clip-type electrodes 5 ₁ , 5 ₂ , held on the ankles
It is connected to one end of each of 5 ₃ and 5 ₄ . At the other end of this clip-type electrode 5 are conductor cords 6 ₁ , 6
₂ , 6 ₃ , and 6 ₄ are connected at one end, and the other ends of the conductor cords 6 ₁ , 6 ₂ , 6 ₃ , and 6 ₄ are connected to the display 7 .

In this way, clip-type electrodes are held on the ankles, wrists, etc. of the human body, and the microcurrent induced on the skin surface is led to the external electrocardiograph 1, and the waveform displayed on the display 7 is visually checked to detect the heart. Diagnosing an abnormality.

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 is also different.

A conventional electrode attached to the wrist or ankle will be described with reference to FIG. 2. Reference numerals 8 and 8' are holding plates of the clip-type electrode 5' that engage with each other 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 clamping plates 8, 8' and the electrode plate 9 have no elasticity, and the electrode plate 9 is fixed to the clamping plate 8. When the electrode plate 9 is held between the body M and the wrist, a distance S is generated and the electrode plate 9 floats due to the fact that the shape of the wrist or ankle is not uniform, and only about half of the electrode plate 9 comes into contact with the outer surface of the living body M. As a result, the contact resistance between the clip-type electrode 5' and the living body M becomes high, causing problems 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. Clamping part 1 for clamping limbs of a living body by working
6, 17, and a pair of clamping plates 12, which are biased in a direction in which the distal ends always approach each other by the spring force of a spring 18 incorporated in the pivot shaft 11,
13, and the pair of clamping plates 1
The terminal holder 19 is provided with a terminal holder 19 that engages with the left and right edges of one of the clamping plates 16, and this terminal holder 19 is arranged between the pair of clamping plates 12 and 13, and when in use, the terminal holder 19 is arranged between the pair of clamping plates 12 and 13. A pressure contact plate section 20 that is pressed against the limbs of a living body, and one clamping plate 12, 1 that stands up from the left and right side edges of this pressure contact plate section 20.
A pair of left and right side edge engaging portions 21 and 22 are elastically pressed against the left and right side edges of the pressure plate portion 2.
It has a first inward protrusion 26 that protrudes toward the other side edge engaging part 22 at a position a certain distance from It has a second inward protrusion 27 at a position spaced apart from the plate part 20 by a certain distance, and further holds the terminal 25 at its rising tip, and the pair of side edge engaging parts 21,
22 is connected to the other side edge engaging portion 21 at a position a certain distance from the pressure contact plate portion 20.
It has a first inward protrusion 35 that protrudes toward the side, and a second inward protrusion 36 at a position further away from the pressure contact plate 20 by a certain distance than the first inward protrusion 35. It further has electrode rod support tongue pieces 29, 30, 31 forming engagement holes 29a, 30a, 31a for inserting the electrode rod 33 at the rising tip thereof, and The tool 19 is connected to the pressure contact plate portion 20.
and a first position where the left and right side edges of the clamping plate 12 are clamped between the first inward protrusions 26 and 35, and the respective first inward protrusions 26 and 35 and the respective An electrocardiograph clip-type device configured to be able to selectively take a second position in which the left and right side edges of the holding plate 12 are held between the second inward protruding portions 27 and 36. The main purpose of this invention is to provide a clip-type electrode that allows the electrode to make good contact with the skin surface of a living body and allows the electrode to be placed in any desired position depending on changes in the clamped part. .

(Example) An example 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 clamping 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.
The outer surface of 5 has an uneven surface to prevent the hand from slipping when gripped. Further, on the distal side of the pivot shaft 11, there are clamping parts 1 for clamping limbs of a living body, such as ankles and wrists, in cooperation with each other.
6, 17, and the clamping plates 12, 13 are provided with spring force of a coil spring 18 incorporated in the pivot shaft 11.
The distal ends of the clamping parts 16 and 17 are always urged in the direction of approaching each other, and the inner sides of the clamping parts 16 and 17 are formed with uneven surfaces to prevent slipping when the clamped part is clamped.

A terminal holder 19 is engaged with the left and right side 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 part 20 which is placed between and presses against the limbs of the living body during use, and one clamping plate 12 which stands up from the left and right side edges of this pressure contact plate part 20. It is composed of a pair of left and right 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 part 20, and a terminal 25 is protruded from approximately the center of this top plate part 24, and one end of the conductor cord is connected to this terminal 25. The other end of the conductor cord is connected to the display. Further, on the inside of the rising plate part 23, a first inward protruding part 26 is provided to protrude toward the other side edge engaging part 22 at a position a certain distance from the pressure contact plate part 20. ing. A second inward protrusion 27 is located at a position further apart from the pressure contact plate 20 by a certain distance than the inward protrusion 26 , that is, above the inward protrusion 26 .
is projected inward.

The other side edge engaging portion 22 of the side edge engaging portions 21 and 22 has a slit 3 having engagement holes 29a, 30a, and 31a at the tip of the rising plate portion 28.
4 and 34' form three mutually independent support tongues 29, 30, and 31. This engagement hole 2
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 center support tongue piece 29 among the support tongue pieces 9, 30, 31 is biased outward compared to the other support tongue pieces 30, 31, so that the electrodes inserted into the engagement holes 29a, 30a, 31a The rod 33 is pushed by the support tongue piece 29 so that it does not easily come out of the engagement holes 29a, 30a, 31a. Further, on the inside of the rising plate part 28, there is a first inward protrusion that is provided to protrude 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. A first inward protrusion 35 is provided to protrude opposite to 26 and protrude toward the other side edge engaging portion 21 . Further than this inward protruding portion 35, the pressure contact plate portion 20
At a position a certain distance away from the other side edge engaging portion 2, that is, above the first inward protruding portion
A second inward protrusion 36 protrudes toward the other side edge engaging part 21 and is opposite to the second inward protrusion 27 protruding from the first rising plate part 23 . has been done.

As shown in FIG. 6, this terminal holder 19 has a connection between the pressure contact plate portion 20 and each first inward protrusion portion 26, 35 provided on the both side edge engaging portions 21, 22. If it is possible to adopt the first position in which the right and left side edges of the clamping plate 12 are clamped between them, as shown in FIG.
each first inward protrusion 26 provided in 22;
35 and each of the first inward protrusions 27, 36, the second
It is also possible to take the position of

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. First inward protrusions 26, 35
and the clamping plate 12 so as to maintain the first position.
By gripping and engaging the left and right edges of the body, it is possible to attach the clip-type electrode 5 to a living body's limbs, even if the limbs are thick, such as wrists and ankles. In addition, if the ankles, wrists, etc. are thin, as shown in FIG. It is sufficient to grip and engage the left and right edges of the clamping plate 12 so as to maintain the second position between the clamping plate 12 and the inward protrusions 27 and 36 of the clamping plate 12.

(Effect of the invention) According to the present invention, the first and second inward protrusions are provided on both side edge engaging portions of the terminal holder that engages with one of the clamping plates, and the position for clamping the clamping plate is adjusted. Since the first position and the second position can be selected selectively, the terminal holder can be brought into sufficient contact with the surface of the living body depending on the size of the living body, and as a result, the electrocardiogram is not distorted. This method is effective for cardiac diagnosis because it does not cause induction problems.

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

[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 showing an example of the terminal holder of the present invention, and Figs. 5 and 6 are explanations showing how the clip-type electrode is used. figure. 5...Clip type electrode, 11...Pivot shaft, 1
2, 13... Holding plate, 14, 15... Gripping portion, 1
6, 17... Holding part, 19... Terminal holder, 20
... Pressure contact plate portion, 21, 22 ... Side edge engagement portion, 2
6, 35...first inward protrusion, 27, 36...
Second inward protrusion, 29, 30, 31...electrode rod support tongue piece, 29a, 30a, 31a...engaging hole.

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 clamping parts 16 and 17 on the distal side of the pivot shaft 11, respectively, for cooperating with each other to clamp 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 the force of a spring incorporated in the pivot shaft 11.
2, 13, and a terminal holder 19 that engages with the left and right side edges of one of the pair of clamping plates 12, 13, and this terminal holder 19 a press-contact plate part 20 disposed between the clamping plates 12 and 13 and pressed against the limbs of the living body during use;
2, and one 21 of the pair of side edge engaging parts 21, 22 is provided with a certain amount of pressure from the press plate part 20. A first inward protrusion 26 that protrudes toward the other side edge engaging portion 22 at a distance.
It also has a second inward protrusion 27 at a position further apart from the pressure contact plate part 20 by a certain distance than the first inward protrusion 26, and further holds the terminal 25 at the rising tip. The other 22 of the pair of side edge engaging parts 21 and 22 has a first side edge engaging part 21 that protrudes toward the other side edge engaging part 21 at a position a certain distance from the pressure contact plate part 20. It has an inward protrusion 35 , a second inward protrusion 36 at a position further apart from the first inward protrusion 35 by a certain distance from the pressure contact plate 20 , and a rising tip end. The terminal holder 19 has electrode rod support tongue pieces 29, 30, 31 forming engagement holes 29a, 30a, 31a for inserting the electrode rod 33, and the terminal holder 19 20 and each of the first inward protrusions 26, 35, the left and right side edges of the clamping plate 12 are held between the first inward protrusions 26, 35 and the first a second position in which the left and right side edges of the clamping plate 12 are clamped between the two inward protrusions 27 and 36; electrode.