JP3086076U - Knee articulation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knee joint tensioning device for an artificial knee joint used by a handicapped person, which is less likely to loosen during running, reduces wear of parts, prolongs life, reduces parts, and suppresses production cost. SOLUTION: The present invention comprises a main body having a ring-shaped hole formed with an internal thread groove or a groove at a rear end, and a rotating shaft having a ring-shaped groove formed with an external screw groove or a groove outside. The outer thread groove or ring-shaped groove is connected to the inner thread groove or ring-shaped hole of the main body, and a projection is formed at both ends of the rotating shaft corresponding to the groove of the thigh apparatus to connect the slip-in thigh apparatus and the tensioning apparatus. The connection of the patella device connects.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a knee joint tensioning device for an artificial knee joint used by persons with disabilities, which is less likely to loosen during running, reduces wear of parts, prolongs life, and reduces manufacturing costs by reducing parts.

[0002]

[Prior art]

 Advances in modern medical technology require constant progress in the treatment effect, and rehabilitation after treatment requires a great deal of assistance. People with disabilities rely on methods such as transplant surgery or artificial artificial limbs to obtain the effect of rehabilitation. When it comes to prostheses, they are not only commonly seen, but they also make it easier for people with disabilities to do things, make up for physical deficits and reduce physical and mental injuries.

FIGS. 1 and 2 show a conventional knee joint. It comprises a patella device 1a, a shock absorber 2a, a thigh device 3a, and a tensioning device 4a. One side of the inside of the patella device 1a and the thigh device 3a is connected to both ends of the shock absorber 2a, and the other side is connected to both ends of the tensioning device 4a. The knee joint has the effect of bending the knee by the shock absorber 2a, and the tensioning device 4a has the effect of pinching and controlling the patella device 1a and the thigh device 3a to conduct and brake the body weight of the human body within a certain bending range. To prevent the knee joint from bending too much and creating a danger.

FIG. 3 shows a three-dimensional exploded view of a conventional knee joint tensioning device. The tensioning device 4a is formed by a tensioning case 4a provided inside the hole 42a and a rotating shaft 41a tightly fixed in the tensioning case 4a.

After the knee joint has been used for a certain period of time, the tensioning case 40a, the rotating shaft 41a and the hole 42a are worn out, the fitted gap increases and becomes loose, and the tensioning case 40a cannot fix the rotating shaft 41a. However, the tension case 4a gradually loses the effect of pinching and controlling, and when the rotating shaft 41a swings and connects with the thigh device 3a, the thigh device 3a is also loose, so that the disabled person cannot stand stably and unexpectedly falls. Accident occurred. As a result, rings 43a are formed on both sides of the rotating shaft 41a, and the rotating shaft 41a is fixed, thereby preventing the swinging motion.

[0006]

[Problems to be solved by the invention]

 However, while the ring 43a prevents the above danger, it has created the following deficiencies.

Although the ring 43a can be controlled so that the rotating shaft 41a does not swing easily, when the tension case 40a is worn out and the effect of controlling the pinch is lost, the tension case 40a must be replaced for safety. The price of the knee joint is very high, which is a heavy burden for the disabled, and the ring 43a has a higher mold manufacturing cost, the selling price is higher and the burden of the disabled is increased, and the disabled can pay this cost. could not.

The cause of this drawback is that when the tension case 40a, the rotating shaft 41a, and the three holes 42a come into contact with each other in a circular plane and slide and combine with each other, the lubricating oil layer is easily pushed out to the edge and the oil comes in contact with the edge. It was difficult to enter the gaps between the surfaces, and there was not enough oil film to protect the lubrication. Also, the tension case 40a is easily worn out and has a short service life, which creates a situation where the rotating shaft 41a swings, and the tension case 40a loses the effect of pinching and controlling, causing an unexpected accident.

Therefore, in the present invention, the rotation shaft is connected by the internal screw groove of the tensioning device main body, and since there is a space for storing oil at the root of the screw groove, an oil layer is formed on the contact surface, and the screw groove surface is in contact with the screw groove surface. The aim was to increase the contact area, reduce wear of parts, prolong service life, eliminate unnecessary parts, and reduce manufacturing costs.

[0010]

[Means for Solving the Problems]

 The present invention comprises a main body having a ring-shaped hole formed with an internal thread groove or a groove at the rear end, and a rotating shaft having a ring-shaped groove formed with an external screw groove or a groove on the outside. The ring-shaped groove and the screw groove or ring-shaped hole in the main unit are connected, and a projection is formed at both ends of the rotation shaft to connect the thigh device and the tensioning device to slide into the thigh device. The connection section connects.

[0011]

[Embodiment]

 FIG. 4 shows a three-dimensional exploded view of the knee joint. At the knee joint, the upper part is connected to the femur, the bottom part has one side formed with a hole 100 on both sides, and the other side forms an articulated curved part 11 formed with holes 110 on both sides. Although not shown in the figure because the patella device 1 is the same as the conventional cushioning structure, a recovery spring is connected to one side of the knee shaft 20 and slides in conjunction with the cushioning device. The hole 21 formed in the upper part in accordance with the space formed in the connecting part 11 corresponds to the hole 110 in the connecting part 11, and the shock absorber 2 formed from the knee shaft rod 20 connected to the patella apparatus 1 by the hole shaft 210, A shock absorber 2 is provided inside, the bottom is connected to the ankle of the prosthesis, the sole of the foot, etc., and the shaft hole 300 is formed on the outside of both projections in the form of a recess at the top, and the groove 31 is formed in the shaft hole 300 on both insides. A rod-shaped thigh device 3 having an appropriate length and a hollow center, forming a portion 30; An inner screw groove 400 is formed at the rear end of the shaft 40, a shaft hole 411 is formed at the center, and a protrusion 412 is provided at both end surfaces. The rotation shaft 41 has an outer screw groove 410 that matches the inner screw groove 400, and the protrusion 412 is a thigh device. In correspondence with the groove 31 of FIG. 3, the sliding-in shaft rod 301 penetrates the shaft hole 300 of the connecting portion 30 and the shaft hole 411 of the rotating shaft 41, and the screw groove 302 stops the shaft rod 301 and connects the thigh device 3 and the tension device 4. The front end of the main body 40 is formed of a tensioning device 4 which forms a connection hole 401 corresponding to the connection hole 100 of the connection portion 10 and is connected to the patella device 1 by a connection rod 101.

FIG. 5A shows a three-dimensional combination diagram of the present invention, and FIG. 5B shows a sectional anatomical diagram. When the main body 40 of the tensioning device 4 and the rotating shaft 41 are aligned with each other, a relatively large space 42 is formed at the base of the inner screw groove 400 and the outer screw groove 410, and the space 42 is filled with oil and the oil layer is formed when the screw groove rotates. An oil film is formed on the thread groove surface to protect the lubrication, reduce surface wear and extend the service life.

Another embodiment is shown in FIGS. 6 and 7. The rotating shaft 41 having a V-shaped groove ring-shaped groove 413 on the outside is fitted with the rear end of the main body 40 having a V-shaped groove ring-shaped hole 402 formed therein. The connection is made by the divided quadrangular connection portion 405, and the same effect as described above is obtained.

[0014]

[Effect of the invention]

 The combination of the main body and the rotating shaft reduces the number of components, reduces costs and manufacturing costs, increases the surface contact area when connecting with thread grooves, and reduces the wear rate and increases the angle of thread grooves when the contact area increases. Making it smaller can save power compared to a flat surface, it is easier to move and enhances safety, and the space where oil accumulates forms a film of oil on the contact surface, protects lubrication, delays wear, and is dangerous for people with disabilities To prevent the occurrence of.

[Brief description of the drawings]

FIG. 1 is a perspective view of a three-dimensional combination according to a conventional example.

FIG. 2 is a side perspective view according to a conventional example.

FIG. 3 is an exploded perspective view of a conventional example.

FIG. 4 is an exploded perspective view of an embodiment of the present invention;

FIG. 5A is a perspective view of a three-dimensional combination according to an embodiment of the present invention.

FIG. 5B is a sectional anatomical view according to one embodiment of the present invention.

FIG. 6 is an exploded perspective view of an embodiment of the present invention;

FIG. 7 is an exploded perspective view of the embodiment of the present invention;

[Explanation of symbols]

 1a patella device 2a buffer device 3a thigh device 4a tension device 40a tension case 41a rotation shaft 42a hole 43a ring 1 patella device 10 connection part 100 connection hole 101 connection rod 11 connection part 2 buffer device 20 knee shaft 21 hole 210 hole shaft 3 Thigh device 30 Connection part 300 Shaft hole 301 Shaft rod 302 Screw groove 31 Groove 4 Tension device 40 Main body 400 Internal screw groove 401 Connection hole 402 Ring hole 403 Upper main body 404 Lower main body 405 Connection part 41 Rotating shaft 410 External screw groove 411 Shaft Hole 412 Projection 413 Ring-shaped groove 42 Space

Claims (1)

[Utility model registration claims] The present invention comprises a main body having a ring-shaped hole formed with an internally threaded groove or groove at the rear end, and a rotating shaft having a ring-shaped groove formed with an externally threaded groove or groove on the outside. The outer thread groove or the ring-shaped groove is connected to the inner thread groove or the ring-shaped hole, and a projection is formed at both ends of the rotating shaft to connect the thigh device and the tensioning device to slide into the thigh device corresponding to the groove of the thigh device. And a connecting portion of the patella device and the connecting portion of the patella device.