JPH07100159A - External artificial joint - Google Patents

Abstract

PURPOSE:To provide an external artificial joint which doesn't disturb the expansion and contraction of a joint and doesn't cause a burden on the joint. CONSTITUTION:Supporting members 11 and 12 are linked on both sides of a hinge 10 and the supporting member 11 has rods 13 and 14 and an angle adjusting section 15 and is connected to a clamper 16. The supporting member 12 has such a structure that a rod 23 is put through a cylinder 24 on which an adjusting ring 25 is screwed and a spring 26 receives a force in the expanding direction, and is connected to the clamper 16. The clampers 16 and 27 are both coupled to the external portions of penetration pins 6 to 9 which penetrate a thighbone 2 and a shinbone 3. The weight is conveyed from the thighbone 2 to the shinbone through the spring 26 of an artificial joint 5, so that a burden is not casted on a knee 1 and an impact is lightened. When the knee is bent and stretched, the artificial joint 5 is also bent and stretched around the hinge 10 as a center so that the movement of the knee is not disturbed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reducing the load applied to joints for treating joint diseases in humans or animals.

[0002]

2. Description of the Related Art As a means for reducing the load applied to a joint, a means for deliberately limiting the load with a cane or a crutch, a means for externally fixing a support so that the joint does not move, and the like are used. . In the means using this support, the load applied to the joint is reduced, but since the movement of the joint is limited, it is inconvenient that daily movement cannot be performed.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to obtain a device for reducing the load applied to a joint without limiting the movement of the joint.

[0004]

[Means for Solving the Problems] A first means for solving the above problems is, as described in claim 1, to hold a pin connected to a skeleton at each end of a pair of hinged supports. It is characterized in that a clamper for performing the operation is provided in series.

Further, as described in claim 2, the second means is characterized in that, in the first means, at least one of the supports is provided with an elastic buffer body.

[0006]

According to the first aspect of the present invention, the device is mounted in a state in which a traction force is applied to the joint, prevents the joint from being loaded, and allows the joint to move by the hinge.
According to the means of claim 2, the shock transmitted to the skeleton through the artificial joint is mitigated by the buffer.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, 1 is a human knee joint, 2 is a femur, 3 is a tibia, and 4 is a fibula. Reference numeral 5 is an artificial joint of the present invention, which is attached to both sides of penetrating pins 6 to 9 penetrating a leg portion outside the body. The penetrating pins 6 to 9 are the same as those used in the past for connecting an extracorporeal auxiliary tube subordinate to a fractured part.

The artificial joint 5 has a hinge 10 having an axis 10a.
Supports 11 and 12 rotatably connected to each other are provided. The support body 11 is composed of rods 13 and 14, and both rods 1
Angles 3 and 14 are connected by an angle adjuster 15 so as to be adjustable. The angle adjusting portion 15 is formed by stacking protruding portions 13a and 14a from the rods 13 and 14 and fastening them with screws 15a. Form and engage.

The end portion of the rod 14 is the clamper 1
6 is adjustable and fixed. Conventionally, the clamper 16 is of the same type as that for fixing an external fixation pipe subordinate to a fractured part to a penetrating pin that penetrates the skeleton, and includes a rod clamper 17, a rotating plate 18, and a pink ramper 19.

The rod clamper 17 has a hole to be fitted into the rod 14 and a slit 17a reaching the hole, and the slit 17a is contracted with a tightening screw 17b so that the rod 1
Fixed in place of 4. The rotary plate 18 has a circular arc surface 1 at the outer end.
8a, a slit (not shown), and a tightening screw 18b are rotatably fitted to a protruding portion 17c extending from the rod clamper 17, and are adjusted and fixed in the direction of arrow 20. The pink ramper 19 is a clamp piece 1 that holds the pins 6 and 7.
9a, 19b and a tightening screw 19c, the clamp piece 1
9a is superposed on the circular arc surface 18a. Tightening screw 19
c is screwed into a female screw swingably held in the rotary plate 18, and when the pink ramper 19 is adjusted in the direction of the arrow 21 along the arc surface 18a and the tightening screw 19c is tightened, the pink ramper 19 is The penetrating pins 6 and 7 are fixed to the rotary plate 18 while being sandwiched therebetween.

The other support 12 comprises a rod 23 and a tubular portion 24 into which the rod 23 is inserted. The rod 23 is provided with a step portion 23a. The tubular portion 24 has a threaded portion 25a of the adjusting ring 25. Is screwed in, and a buffer spring 26 is interposed between the step portion 23a and the adjusting ring 25.

A clamper 27 is connected to the connecting portion 24a extending downward from the cylindrical portion 24, and both ends of the penetrating pins 8 and 9 are clamped by the clamper 27. The clamper 27 includes clamp pieces 27a and 27b and a tightening screw 27c.

With the above-described structure, the clamper 27 is fixed to the lower through pins 8 and 9, and the tightening screw 18b of the rotary plate 18 of the upper clamper 16 is loosened to remove the rod clamper 1.
7 and the pink ramper 19, the rod 14 and the penetrating pins 6 and 7 are temporarily fixed, the tightening screws 17b, 18b and 19c are tightened while adjusting the fixed position and the fixed angle, and the joint 10 is pulled. Fix joint 1 in a state where it does not hinder flexion and extension.

At this time, the rods 1 and 1 are moved by the angle adjusting unit 15.
The angle of 4 is adjusted to adjust the shape of the support 11, the adjustment ring 25 is rotated to adjust the resilience of the spring 26, and the vertical position of the hinge 10 is finely adjusted.

With this mounting, most of the body weight is transmitted from the femur 2 to the tibia 3 through the penetrating pins 6 and 7, the artificial joint 5, and the penetrating pins 8 and 9, and acts on the joint 1. Becomes a little. When the knee is bent and stretched, the artificial joint 5 bends and extends around the hinge 10 together with the knee, so that walking and other daily activities can be performed without any hindrance.

In the above embodiment, the artificial joint 5
Although it is used on both sides of the leg, the penetrating pins 6 to 9 may be projected from only one side of the leg and one artificial joint 5 may be interposed to make it a cantilever type. Also, in the embodiment, the lower clamper 2
7 and the cylindrical portion 24 are integrated at the connecting portion 24a, but an adjustable position adjusting mechanism can be provided in place of the connecting portion 24a, and the clamper 16 or 27 can be replaced vertically. The upper and lower parts can be the same type of clamper.

The structure of the hinge 10 is not limited to that shown in the figure, but a hole for receiving the shaft 10a can be provided with a margin, for example, a large-diameter hole, a horizontally long elliptical hole, or a substantially heart-shaped circle. It may be an arcuate hole or the like.

Although the case of using the knee joint has been described above, the invention can also be used for the elbow joint and also for pets and livestock.

[0019]

As described above, according to the first aspect of the present invention, since the pair of supports that can be bent and extended by the hinge can be externally fixed along the joint, the load applied to the joint can be reduced. It has an effect of being useful for treatment, and allowing the joint to flex and extend freely so that there is no inconvenience in behavior.

According to the second aspect of the invention, the shock transmitted through the artificial joint is mitigated by the cushioning body, which has the effect of reducing discomfort.

[Brief description of drawings]

FIG. 1 is a front view showing a mode of use of an embodiment of the present invention.

[Fig. 2] Similarly, a side view

[Explanation of symbols]

5 Artificial joint 6-9 Penetration pin
10 Hinge 11, 12 Support 13, 14, 23 Rod
15 Angle adjuster 16, 27 Clamper 17b, 18b, 19c, 27
c Tightening screw 24 Tube 25 Adjustment ring
26 spring

Claims (2)

[Claims] 1. An extracorporeal artificial joint characterized in that a clamper for holding a pin coupled to a skeleton is connected to each end of a pair of hinge-supported supports. 2. The extracorporeal artificial joint according to claim 1, wherein an elastic cushioning body is provided on at least one of the supporting bodies.