JPS61203945A - Joint of induction electrode hanger for living body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a joint for a biological inductive electrode suspension device, and particularly for a mobile frame on which an electrocardiograph is mounted in a portable electrocardiograph device. This invention relates to a joint of a biological induction electrode hanging device to be attached.

"Prior Art" As is well known, bioelectricity generated in a living body is induced by the activities of the heart, brain, muscles, etc.

In particular, with regard to bioelectricity generated in the heart, abnormalities in the heart are diagnosed by detecting weak currents induced on the skin of a living body using an external electrocardiograph. In this electrocardiograph, in order to electrically connect the input section to the living body, the living body's induction electrode must be brought into close contact with the surface of the skin.

Generally, in order to detect abnormalities in a patient's heart using an electrocardiograph, the patient M is placed lying down on an examination table 1 or 2 installed in a hospital room, as shown in Figure 1, and the electrocardiograph is performed. The movable frame 3 on which a total of 4 objects are mounted is transported to the vicinity of the subject M. A bracket 5 is protruded from one end of the movable frame 3.
A suspension device A is attached to the bracket 5, from which a biological induction electrode 18 that is in close contact with the skin surface of the subject M and that derives a weak current from the heart is suspended.

This suspension device A includes a support column 8, a swinging arm lO5, a relay head 1
Using these devices, the induction electrode 18 is brought into close contact with an appropriate position on the skin surface of the subject M, and the weak current from the heart is recorded on the electrocardiograph 4.

"Problems to be Solved by the Invention" By the way, the hanging device A can be freely moved to any position and the induction electrode 21 can be placed at an appropriate position on the skin surface of the subject M.
It is something that can be closely attached to.

Then, to move to an appropriate position on the skin surface of subject M,
As shown in FIG. 7, the suspension device is moved by holding the support column 8 by hand and pulling or pushing it in the direction of the arrow, for example. However, since the tip of the support column 8 of the suspension device is fixed via a joint 7' to a bracket 5 that projects from the movable frame 3, it is often damaged by manual pulling or pressing force. This caused inconvenience in recording electrocardiograms.

Further, since the column 8 is suspended upward from the bracket 5 and the joint 7 does not have a mechanism for lowering the column 8 as necessary, the column 8 and the swinging arm 10 are As shown in FIG.
The distance from the movable frame 3 on which the swinging arm is mounted is approximately 1o.
If the distance between the examination table 1 and the movable frame 3 is greater than the length of the swinging arm 10, the induction electrode 18 cannot be brought into close contact with the skin surface of the subject M. Another problem was that it was difficult to record electrocardiograms.

``Means for Solving the Problems'' Therefore, the present invention was created by focusing on the above-mentioned problems, and was developed to provide a movable frame 3 on which an electrocardiograph 4 is mounted, so that the electrocardiograph 4 can be freely rotated around a vertical axis. A crank 21 is integrally connected to the upper end of the rotary shaft 6 which is pivotally supported, and a wave is formed integrally on the crank 21 and overflows in a circular arc on the outer peripheral surface around the horizontal axis. An eccentric block 22 supports the plate 26 with the horizontal axis as the center line, and the eccentric block 22 is pivotally supported around the horizontal axis, and has a biological induction electrode cord on the upper surface side. An eccentric bottomed cylindrical portion 31 is protruded to support the lower end of the column 8 for extending and supporting the column 12 at a position eccentric with respect to the rotation axis 6 in a rotatable manner as opposed to the center line of the column 8. In addition, a block cover 30 from which a female threaded through cylinder part 32 is protruded, and a roller 29 that is held at the inner opening of the female threaded through cylinder part 32 and are always in contact with the wave surface along the wave surface of the plate 26. A resilient spring 34 that presses the roller 29 against the corrugated plate 26 in the female threaded through cylinder part 32, and a woodcutter threaded part 36 are screwed into the female thread part of the female threaded through cylinder part 32. It is an object of the present invention to solve the above-mentioned problems by providing a joint for a biological induction electrode hanging device, which is equipped with a thumbscrew 35 that presses the elastic spring 34 toward the roller 29 side. This is the purpose.

``Example'' Hereinafter, how the configuration of the present invention is actually embodied will be explained with reference to the drawings, together with its operation.

FIG. 1 is an overall perspective view showing the state of use of an electrocardiograph lead electrode according to an embodiment of the present invention, and 1.2 in the figure is an examination table on which a subject M is lying; A movable frame 3 on which an electrocardiograph 4 is mounted is positioned between the examination tables 1 and 2.

A bracket 5 is provided protruding from one end of the movable frame 3, and a pivot shaft 6 is attached to the bracket 5 so as to be freely rotatable around the vertical axis.
is pivoted. A joint 7 is attached to the upper end of this rotating shaft 6.
are integrally connected.

The structure of this joint 7 will be explained in detail later.

The lower end of a support 8 is supported by the joint 7, and the support 8 is rotatable around its own central axis, and is eccentric to the rotation axis 6 when in a vertical state. Moreover, it can be lowered to a desired angle as needed.

One end of the undulation joint 9 is connected to the tip of this support 8,
At the other end of this undulating joint 9, a base end portion of a swinging arm 10 is pivotally supported with respect to an upper end portion of the support column 8 so as to be able to rise and fall freely. A relay head 11 is fixed to the tip of the swinging arm 10, and a plurality of electrode guide cords 18a are suspended from a plurality of through holes 17 formed in the relay head 11. A biological induction electrode 1 is attached to one end of each cord 18a.
8 is installed. Reference numeral 12 denotes a living body induction electrode cord that guides a weak current in the living body derived from the living body induction electrode 18 that is in close contact with the skin surface of the subject M to the electrocardiograph 4;
It extends beyond the swinging arm 10.

13, 14. , 15 and 16 are fasteners for fixing this living body induction electrode cord 12 to the support column 8 and the swinging arm 10. Reference numeral 19 denotes a handle for freely rotating the column 8 around its own central axis relative to the joint 7, and for freely moving the swinging arm 10 relative to the column 8 via the undulating joint 9. be.

FIG. 2 shows the structure of a joint 7 that connects a rotating shaft 6 to a bracket 5 protruding from the movable frame 3 and a support 8 that can be lowered to a desired angle around a horizontal axis.
This will be explained according to FIGS. 3, 4, and 5. In the figure, 20 is the base of the joint 7 on which the rotation shaft 6 is integrally installed, and a crank 21 is integrally formed at the upper end of this base 20, as shown in FIG. There is. As shown in FIG. 4, a circular eccentric block 22 is protruded from the upper surface of the crank 21, and the outer peripheral surface of the eccentric block 22 around the horizontal axis is a wave-shaped surface 23. .25 is engraved.

This slit 24.25 has a locking portion 27°28 of the corrugated plate 26.
are fitted and locked to cover the corrugated surface 23 of the arcuate outer peripheral surface of the eccentric block 220. This corrugated plate 26 has a plurality of roller engaging portions 26a in the vertical direction.

26b and 26c are formed, and when the corrugated plate 26 covers the corrugated surface 23 of the eccentric block 22, the roller engaging portion 26a of the corrugated plate 26 engages the roller in the concave portion 23a of the corrugated surface 23 of the eccentric block 22. The engaging portion 26b fits into the recess 23b, and the roller engaging portion 26C fits into the recess 23C.

Reference numeral 30 designates a block cover that covers the eccentric block 22. As shown in FIG.
As shown in FIG. 2, the support column 8 is supported along its center line so as to be able to rise and fall freely. When the block cover 30 covers the eccentric block 22 as shown in FIG. Be in an eccentric position. Further, as shown in FIG. 4, the block cover 30 has a pivot pin hole 3? and eccentric block 22
It is attached to the eccentric block 22 by a pivot pin (not shown) that passes through a pivot pin hole 37 bored in the eccentric block 22, and is rotatable about the pivot pin.

Further, the block cover 30 is provided with a female threaded through-cylindrical portion 32 projecting therein.

A roller 29 is fitted into this internally threaded penetrating cylindrical portion 32, and this fitted roller 29 is connected to a plurality of roller engaging portions 26a formed on the corrugated plate 26.

26b and 26C.

In this state, the elastic spring 33 is further inserted into the female threaded through-cylindrical portion 3.
2, the resilient spring 33 comes into contact with the roller 29, and then, when the thumb screw 34 having the male threaded portion 35 is screwed into the female threaded through-cylindrical portion 32, the resilient spring 33 is pressed and the pressed resilient spring 33 comes into contact with the roller 29. The spring 33 presses the roller 29, and the pressed roller 29 brings the corrugated plate 26 into contact with the corrugated surface 23 of the outer peripheral surface of the eccentric block 22. The corrugated plate 26 is the elastic spring 33
When the block cover 30 comes into contact with the corrugated surface 23 due to the pressing force, the block cover 30 is fixed to the eccentric block 22 by the rollers 29. For example, when the roller 29 comes into contact with the roller engaging portion 26a of the corrugated plate portion, as shown in FIG.
The support column 8 is on the vertical axis with respect to the movable frame 3.

Further, in order to lower the support column 8 from a vertical state to a desired angle, the block cover 30 may be rotated downward about a pivot pin (not shown). To do this, loosen the threaded thumbscrew 35, and the resilient spring 33 and roller 29 will be free from each other. At this stage, if you grip the block cover 30 and rotate it downward, the roller 13 will move. It slides on the outer surface of the corrugated sheet 26 from the engaging portion 26a of the corrugated sheet 26 and moves to the roller engaging portion 26b or 26C. Next, when the thumbscrew 35 is tightened at that position, the elastic spring 33 is pressed, and the pressed elastic spring 33 is moved to the roller 29.
The pressed roller 29 brings the corrugated plate 26 into contact with the corrugated surface 23 of the eccentric block 22, and the block cover 30
will be fixed to the eccentric block 22. roller 2
9 comes into contact with the recess 23b or 23C of the wavy surface,
The support column 8 is intended to be lowered to an angle that is perpendicular to the movable frame 3.

This collapse of the support column 8 means that the swinging arm 10 is extended toward the subject M as shown in FIG.
As a result, even if the examination tables 1 and 2 on which the patient M is lying are separated from the movable frame 3 by more than the length of the swinging arm 10, the induction electrode 18 can be brought into close contact with the skin surface of the patient M. Is possible. Further, a roller 29 is used to undulate and fix the block cover 30 at a predetermined position with respect to the eccentric block 22.
, the outer circumferential surface of the roller 29 engages with the engaging part of the corrugated plate, so the contact area that engages with the engaging part becomes wider compared to a ball-shaped roller, so the block cover 30 can be In addition to being able to be firmly fixed, the roller 29 is attached to the eccentric block 2.
The outer peripheral surface of the corrugated plate 26 covering the 20-corrugated surface 23 can be smoothly slid and moved to a predetermined engagement portion.

Next, to explain the operation of the living body induction electrode suspension device configured as described above, first, as shown in FIG.
A movable frame 3 on which an electrocardiograph 4 is mounted is placed next to the examination table 1 on which the person is lying.

Next, as shown in FIG. 5, the support 8 is grasped and brought into close contact with an appropriate position on the skin surface of the subject M. In this case, even if the support 8 is moved and the movable frame 3 is moved, It is freely rotatable around its own central axis with respect to the joint 7, and when it is in a vertical state, the support column 8 is eccentric with respect to the rotation axis 6.
, even if a large force is applied to the support 8 by gripping and moving the support 8, it will be dispersed as shown by the arrow, and the support 8 will not break. In this way, the induction electrode 18 is brought into contact with an appropriate position on the skin surface of the subject M to derive a weak current in the living body from the skin surface of the subject M and guide it to the electrocardiograph 4.

In addition, when the examination table 1 is located at a distance from the movable frame 3 by more than the length of the swinging arm, the induction electrode 18 is in a vertical position with respect to the movable frame 3. This means that the electrocardiogram cannot be recorded because it does not reach the subject M.

In such a case, if the eccentric block cover 30 of the joint 7 is rotated downward about a pivot pin (not shown), the column 8 will fall down at the desired angle, and the swinging arm 10 will be placed on the examination table 1. Extend it towards. As a result, it becomes possible to bring the induction electrode 18 into close contact with the skin surface of the subject M.

("Effects of the present invention") As explained above, according to the present invention, a rotating shaft is provided that is rotatably supported around the vertical axis on the movable frame, and Rotates freely around the central axis,
We installed a column whose lower end was supported by a joint so that it was eccentric to the rotation axis when it was vertical, so even if an excessive load was applied to the column, the force was dispersed.
As a result, there is no fear that the support will break, and there will be no problem in recording bioelectricity generated in the living body.

In addition, a crank integrally connected to the upper end of the rotating shaft,
An eccentric block that is integrally formed on the crank and supports a corrugated plate, a block cover from which an eccentric bottomed cylindrical part and a through cylindrical part protrude, a roller that is fitted into the through cylindrical part, and a roller that presses the roller. Since a resilient spring is provided, and a thumbscrew is provided that presses the resilient spring ball toward the ball side, the column can be collapsed at a desired angle, and its swinging arm extends to connect with the swinging frame. Even if the distance from the examiner is greater than the length of the swinging arm, the adsorption type induction electrode can be brought into close contact with the examinee.

Furthermore, since rollers are used to raise and lower the support column, the outer circumferential surface of the roller engages with the engaging part of the corrugated plate over a wide area, making it possible to firmly fix the block cover in the desired position. In addition, the rollers can slide smoothly on the outer circumferential surface of the corrugated plate covering the eccentric block and can be easily moved to the desired engagement area, resulting in the advantage that the support column can be easily raised and lowered. be.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view showing the state of use of a front pole suspension device for an electrocardiograph using a joint according to an embodiment of the present invention, Fig. 2 is a side view of the main part of Fig. 1, and Fig. 3 is a perspective view of the joint part, 4th
The figure is an exploded perspective view of the joint. FIG. 5 is an explanatory diagram of the operation of the main part of FIG. 1, FIG. 6 is an explanatory diagram of the operation of the main part of FIG. 1, and FIG. 7 is a perspective view of the main part of a conventional electrocardiograph electrode hanging device. . 3...Moving frame, 4...Electrocardiograph,
6... Mountain/rotation axis, 8... Support column,
12... Biological induction electrode cord, 21...
... Crank, 22 ... Eccentric block, 26 ... Corrugated plate, 29 ... Roller, 30 ... Block cover, 31.
... Eccentric bottomed cylinder part, 32 ... Penetrating cylinder part with internal thread, 34 ... Self-resilient spring, 35
...Thumb screw. Applicant Fukuda Denshi Co., Ltd. Agent Patent Attorney Junya Suzuki Figure 7

Claims (1)

[Claims] A crank 21 is integrally connected to the upper end of a rotation shaft 6 that is rotatably supported around a vertical axis with respect to a movable frame 3 on which an electrocardiograph 4 is mounted; An eccentric block 22 that is integrally formed and supports a corrugated plate 26 along an arc with the horizontal axis as the center line is disposed on the outer circumferential surface around the horizontal axis;
, which is pivotally supported around the horizontal axis so as to be freely ups and downs,
On the upper surface side, a lower end portion of the support column 8 for extending and supporting the biological induction electrode cord 12 is provided to support the lower end portion of the support column 8 so as to be rotatable about the center line of the support column 8 at a position eccentric to the rotation axis 6. An eccentric bottomed cylindrical portion 31 is provided protrudingly, and
A block cover 3 with a protruding through cylinder portion 32 with a female thread
0, and a roller 2 that is held at the inner opening of the female threaded through-cylindrical portion 32 and is always in contact with the corrugated plate 26 along the corrugated surface.
9, a resilient spring 34 that presses the roller 29 against the corrugated plate 26 in the female threaded penetrating tube portion 32, and a male threaded portion 36 screwed into the female threaded portion of the female threaded penetrating tube portion 32. A joint for a biological induction electrode hanging device, comprising a thumbscrew 35 that presses the resilient spring 34 toward the roller 29.