JPH0140483Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention is a joint device for a biological inductive electrode hanging device, and in particular a movable frame on which an electrocardiograph is mounted in a portable electrocardiograph device. This invention relates to a joint device for a living body induction electrode hanging device that is attached to a body.

"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. And this electrocardiograph
In order to electrically connect the input section to a living body, a living body 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, and a living body induction electrode 18 is suspended from the bracket 5 in close contact with the skin surface of the subject M to derive a weak current from the heart. A hanging device A is attached.

This suspension device A is equipped with devices such as a support column 8, a swinging arm 10, and a relay head 11, and these devices are used to bring the induction electrode 18 into close contact with an appropriate position on the skin surface of the subject M. The weak electrical current from the heart is recorded on an electrocardiograph.

"Problems to be Solved by the Invention" As described above, the hanging device A can be freely moved to any position to bring the induction electrode 18 into close contact with an appropriate position on the skin surface of the subject M.

In order to move to an appropriate position on the skin surface of the subject M, in particular, the swinging arm 10 is lowered downward by the joint device 9 and fixed at an arbitrary position, and the induction electrode 18 is placed on the skin surface of the subject M. You need to be in close contact. In order to lay down and fix the swinging arm 10, the tightening knob of the joint device 9 is rotated to tighten or loosen it, but in the structure of the conventional joint device, it can be tightened once and then moved to any position. Even if the swing arm 10 is fixed to the position shown in FIG.

"Means for Solving the Problems" Therefore, this invention was devised by paying attention to the above problems, and consists of a column 8 whose lower end is supported by a movable frame 3 on which an electrocardiograph 4 is mounted. A joint device for pivotally supporting a swinging arm 10 having a relay head 11 for a living body induction electrode cord 12 at its tip at an upper end thereof, in a manner that the swing arm 10 can be raised and lowered with respect to the support 8. The pivot head 20 formed on the top of the support column 8 or the base of the swing arm 10 and the pivot head 20 formed on the other of the top of the support column 8 or the base of the swing arm 10 are viewed from both left and right sides. A pair of clamping plates 25,
26, the base end has a screw head 29, and the distal end is one of the pair of clamping plates 25, 26.
6. The pivot head 20 and the pair of clamping plates 2
The screw shaft 30 passes through the other clamping plate 25 of the pair of clamping plates 25, 26 in sequence, the screw shaft 30 passes through the pair of clamping plates 25, 26 and the pivot head 20, and the clamping plates 25, 26 and the pivot It has a female threaded part 37 in the center that is screwed into the tip of the threaded shaft 30 passing through the head 23, and a flange part 3 on one side when viewed in the axial direction.
On the outer peripheral surface of the cylindrical outer peripheral part 32 having a diameter of Said cylindrical outer peripheral part 3
It is an object of the present invention to solve the above-mentioned problems by providing a joint device for a living body induction electrode suspension device, which is formed larger than the width in the axial direction of the device.

``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 induction electrode based on an embodiment of the present invention,
1 and 2 in the figure are the examination tables on which subject M is lying;
A movable table frame 3 on which an electrocardiograph 4 is mounted is arranged between the examination tables 1 and 2.

A bracket 5 projects from one end of the movable frame 3, and a rotation shaft 6 is pivotally supported by the bracket 5 so as to be rotatable around a vertical axis. This rotation axis 6
A joint 7 is integrally connected to the upper end of the .

The lower end of a column 8 is supported by the joint 7, and this column 8 is rotatable around its own central axis, and when in a vertical state, the lower end of the column 8 is supported.
It is in an eccentric state with respect to the main body, and can be lowered to a desired angle as necessary.

One end of a joint device 9 is connected to the distal end of the column 8, and the base end of a swinging arm 10 is pivotally supported at the other end of the joint device 9. It can rise and fall freely with respect to the subject M. The structure of the joint device 9 will be explained in detail later.

A relay head 11 is fixedly installed at the tip of the swing 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 18 is attached to one end of each cord 18a. Reference numeral 12 denotes a biological inductive electrode cord that guides a weak current in the living body derived from the biological inductive electrode 18 that is in close contact with the skin surface of the subject M to the electrocardiograph 4, and is connected along the pillar 8 and the swinging arm 10. It has been extended.

Numerals 13, 14, 15, and 16 are fasteners for fixing this biological induction electrode cord 12 to the support column 8 and the swinging arm 10. Reference numeral 19 denotes a handle for rotating the column 8 about its own central axis with respect to the joint 7, and for moving the swinging arm 10 freely up and down with respect to the column 8 via the joint device 9.

The structure of the joint device 9 for raising and lowering the swinging arm 10 will be explained with reference to FIGS. 2, 3, 4, and 5. The top of the column 8 is formed with a circular pivot head 20 as shown in FIG.
A boss portion 21 is integrally formed inside the 0, a shaft hole 22 is bored in the center of the boss portion 21, and a reaction spring 24 is wound around the outer periphery of the boss portion. On the other hand, a pair of clamping plates 25 and 26 are integrally formed at the base end of the swinging arm 10 and are spaced apart and facing each other.
The pivot head 20 of is accommodated and clamped. pivot head 20
is accommodated in the clamping plates 25 and 26, the clamping plates 2
The shaft hole 27 bored in the center of the pivot head 20 matches the shaft hole 22 bored in the boss portion 21 integrally formed on the pivot head 20.

A screw shaft 30 having a screw head 29 passes through the clamping plates 25, 26, the pivot head 20, and the intervening plate 28 in this order through the matching shaft holes 22, 27 via the intervening plate 28. The distal end of the screw shaft 30 passing through the screw shaft 30 is screwed into a tightening knob 31.

As shown in FIG.
A plurality of engaging recesses 34 are formed in the cylindrical outer peripheral portion 32, and a flange portion 33 is integrally formed on one side when viewed in the axial direction. As shown in FIG. 4, an engaging protrusion 36 on which an elastic friction ring 35 made of rubber is provided on the outer circumferential surface of the cylindrical outer circumferential surface 32 inwardly protrudes from the engaging recess 34. It is made to fit by engaging with. This elastic friction ring 35
When fitted to the outer circumference of the elastic friction ring 35, the axial width C of the elastic friction ring 35 is equal to the axial width b of the cylindrical outer circumference 35.
Since the elastic friction ring 35 is formed larger than the cylindrical outer peripheral portion 32, one end of the elastic friction ring 35 protrudes from the cylindrical outer peripheral portion 32. Reference numeral 39 denotes a non-slip convex portion that prevents the hand from slipping when operating the tightening knob 31 by hand.

Since the elastic friction ring 35 is provided on the outer circumferential surface of the cylindrical outer circumferential portion 32 so as not to slide in the circumferential direction, the clamping plates 25 and 26 can be tightened or loosened by rotating the tightening knob 31. If you do so, your hands will not slip. Furthermore, when the clamping plates 25 and 26 are tightened to fix the swinging arm 10 at a desired position, one end of the elastic friction ring 35 of the tightening knob protrudes and comes into frictional contact with one clamping plate 25. The tightening becomes strong, and as a result, the swinging arm 10 does not fall down due to its own weight, and can be kept fixed at any desired position.

"Effects of the Present Invention" As explained above, according to the present invention, the elastic friction ring does not slide in the circumferential direction on the outer peripheral surface of the cylindrical outer peripheral part having the flange part 33 on one side when viewed in the axial direction. Since they are fitted in this way, the tightening knob can be easily operated without the hand slipping when turning it.

In addition, the axial width of the elastic friction ring is larger than the axial width of the cylindrical outer periphery, so one end of the elastic friction ring protrudes from the outer surface of the cylindrical outer periphery, allowing the tightening knob to be rotated. When tightened, the elastic friction ring directly rubs and contacts the clamping plate, so the tightening is strong, and as a result, there is no risk that the swinging arm will fall down due to its own weight, and it will remain fixed in the desired position. It has the advantage of being able to

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing the state of use of an electrocardiograph electrode hanging device using a joint device according to an embodiment of the present invention, FIG. 2 is a perspective view of the main part of FIG. 1, and FIG.
The figure is an exploded perspective view of the joint part of FIG. 2, FIG. 4 is a perspective view of the tightening knob, and FIG. 5 is an exploded perspective view of the tightening knob of FIG. 4. 3...Moving underframe, 4...Electrocardiograph, 8...Strut,
10... Swinging arm, 11... Relay head, 20...
Pivot head, 25, 26... clamping plate, 30... threaded shaft, 31... tightening knob, 35... elastic friction ring, 37... female threaded portion.

Claims (1)

[Claims for Utility Model Registration] (1) At the upper end of the column 11 whose lower end is supported by the movable frame 3 on which the electrocardiograph 4 is mounted, the relay head 11 of the biological induction electrode cord 12 is attached to the tip end. It is a joint device for pivotally supporting a swinging arm 10 having a swinging arm 10 with respect to the pillar 8 so as to be able to rise and fall freely. The support head 20, a pair of clamping plates 25 and 26 formed on the other of the top of the support column 8 or the base of the swinging arm 10 and holding the pivot head 20 from both left and right sides, and a screw at the base end. It has a head 29 whose tip end is connected to the pair of clamping plates 2.
5, 26, one of the clamping plates 26, the pivot head 2
0, and a screw shaft 30 that passes through the other clamping plate 25 of the pair of clamping plates 25 and 26 in sequence, and a tip of the screw shaft 30 that passes through the pair of clamping plates 25 and 26 and the pivot head 20. An elastic friction ring 35 is arranged on the outer peripheral surface of the cylindrical outer peripheral part 32, which has a female screw part 37 in the center thereof and a flange part 33 on one side when viewed in the axial direction, so as to prevent it from sliding in the circumferential direction. Fitted tightening knob 31
and an axial width C of the elastic friction ring 35 is formed to be larger than an axial width of the cylindrical outer peripheral portion 32. (2) The elastic friction ring 35 fitted on the outer circumferential surface of the cylindrical outer circumferential portion 32 is made of a rubber-like material. Lower device articulation device. (3) Utility model registration claim 1, wherein a convex portion 38 is formed on the outer circumferential surface of the elastic friction ring 35 fitted to the outer circumferential surface of the cylindrical outer circumferential portion 32.
The joint device of the biological induction electrode hanging device according to 2.