CN209984377U

CN209984377U - Joint connecting mechanism

Info

Publication number: CN209984377U
Application number: CN201920648353.0U
Authority: CN
Inventors: 王平
Original assignee: Shengda Qingjun Zhuolu Material Technology Co Ltd
Current assignee: Shengda Qingjun Zhuolu Material Technology Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-01-24
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a joint connecting mechanism, which comprises an elbow joint prosthesis; the elbow joint prosthesis comprises a humerus handle, a radius handle and a movable part, wherein the lower end of the humerus handle is provided with a humerus pulley, the movable part is connected with the spherical end of the humerus pulley, and the movable part is arranged at the upper end of the radius handle; the humerus handle is movably connected with the radius handle through a movable part; the upper end of the radius handle is fixedly provided with a radius head; the movable part comprises a lining, a locking ring and a metal cup; the lining and the locking ring are respectively arranged on the upper side and the lower side of the interior of the metal cup; the center of the lower end of the lining is sunken upwards to form a concave mortar; the locking ring is an annular structure with a through opening in the center; the head of the radius on the radius handle upwards passes through the through opening and then is clamped in the concave mortar; the utility model discloses a joint coupling mechanism has realized being connected of elbow humerus and radius, can bear higher load in the use, and stability is stronger, can slow down the impact to the radius in the use simultaneously, protects the radius.

Description

Joint connecting mechanism

Technical Field

The utility model relates to a coupling mechanism especially relates to a joint coupling mechanism.

Background

The elbow joint is composed of the distal humerus end and the proximal radioulnar joint surface and plays a role in connecting the humerus, the radius and the ulna. When the elbow joint is injured by rheumatism, osteoarthritis, trauma or the like, the function of the elbow joint is lost and severe pain is felt. In this case, in order to restore the function of the elbow joint, a replacement operation of the artificial elbow joint is required.

The artificial elbow joint is a joint connecting mechanism, is the same as artificial hip joint and knee joint, is made of metal material and high polymer material, and is mainly divided into hinge type artificial elbow and surface artificial elbow joint. The metal hinge type artificial elbow needs to be fixed by bone cement, the artificial joint and the bone cement are used in combination at the positions of a hip joint, a knee joint and the like, the effect is very good, but when the metal hinge type artificial elbow adapts to the specific situation of the elbow joint, adverse effects occur, because the artificial elbow joint is different from the joints which mainly have pressure, such as the hip joint, the knee joint and the like, the arm of a person often needs to be used for holding objects, the situation of tension is more, the long-term pulling effect can generate destructive effect on the connection of the bone cement of the common elbow joint, the artificial elbow joint can not be stabilized and stably operated, and therefore, the research and development of the high-stability artificial elbow joint which can bear high load is very important.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a joint connecting mechanism.

In order to solve the technical problem, the utility model discloses a technical scheme is: an articulating mechanism comprising an elbow prosthesis; the elbow joint prosthesis comprises a humerus handle, a radius handle and a movable part, wherein the humerus handle is connected with the humerus, and the radius handle is connected with the radius; the lower end of the humerus handle is provided with a humerus pulley, the movable part is connected with the spherical end of the humerus pulley, and the movable part is arranged at the upper end of the radius handle; the humerus handle is movably connected with the radius handle through a movable part;

the upper end of the radius handle is fixedly provided with a radius head, a positioning ring sheet is arranged below the radius head, and the positioning ring sheet is fixed on the upper part of the radius handle;

the movable part comprises a lining, a locking ring and a metal cup; the metal cup is a cylindrical structure with a hollow interior, and the lining and the locking ring are respectively arranged on the upper side and the lower side of the interior of the metal cup;

the upper end of the lining is sunken downwards to form a concave arc surface; the center of the lower end of the lining is sunken upwards to form a concave mortar; the locking ring is an annular structure with a through opening in the center;

the head of the radius on the radius handle passes through the through hole at the center of the locking ring upwards and then is clamped in the concave mortar of the lining.

The upper end of the lining is protruded outwards along the circumference to form a flange, and the lower end of the flange is connected with the upper end of the metal cup.

One side of the locking ring is vertically provided with an opening.

The lower end of the radius head is spaced from the positioning ring piece.

The upper end opening of the metal cup is larger than the lower end opening thereof.

The utility model discloses a joint coupling mechanism has realized being connected of elbow humerus and radius, can bear higher load in the use, and stability is stronger, can slow down the impact to the radius in the use simultaneously, protects the radius.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the movable part of fig. 1.

Fig. 3 is an assembly view of the movable member.

Fig. 4 is a longitudinal sectional view of the movable member.

In the figure: 1. a humeral stem; 2. a radius stem; 3. a humeral pulley; 4. a movable part; 5. the radius; 6. a liner; 7. a metal cup; 8. the head of the radius; 9. a locking ring; 10. positioning the ring sheet; 11. a concave arc surface; 12. concave mortar; 13. a port; 14. a flange; 15. an opening; 16. a spherical end; 17. the ulna.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, an articulating mechanism includes an elbow prosthesis; the elbow joint prosthesis comprises a humerus handle 1, a radius handle 2 and a movable part 4, wherein the humerus handle 1 is connected with a humerus, and the radius handle 2 is connected with a radius 5; the elbow prosthesis may also be connected to the ulna 17 by an ulnar stem (not shown).

The lower end of the humerus handle 1 is provided with a humerus pulley 3, a movable part 4 is connected with a spherical end 16 of the humerus pulley 3, and the movable part 4 is arranged at the upper end of the radius handle 2; the humerus handle 1 is movably connected with the radius handle 2 through a movable part 4;

a radius head 8 is fixedly arranged at the upper end of the radius handle 2, a positioning ring piece 10 is arranged below the radius head 8, and the positioning ring piece 10 is fixed at the upper part of the radius handle 2; the lower end of the radius head 8 is spaced from the retainer ring tab 10.

The positioning ring piece 10 is attached to the proximal surface of the radius 5, thereby protecting the radius 5 and preventing the movable part 4 from impacting the radius 5.

As shown in fig. 2-4, the movable member 4 includes a liner 6, a locking ring 9, a metal cup 7; the metal cup 7 is a hollow cylindrical structure, the upper end opening of the metal cup 7 is larger than the lower end opening of the metal cup, and the lining 6 and the locking ring 9 are respectively arranged on the upper side and the lower side of the interior of the metal cup 7; the upper end of the liner 6 is protruded outward along the circumference to form a flange 14, when the liner 6 is installed on the inner upper side of the metal cup 7, the lower end of the flange 14 is connected with the upper end of the metal cup 7, and the flange 14 plays a role of limiting the position of the liner 6 in the metal cup 7.

The upper end of the lining 6 is sunken downwards to form a concave cambered surface 11, and the concave cambered surface 11 is matched with a spherical end 16 of the humerus pulley 3; when the humeral stem 1 remains in place as the radius 5, ulna 17 and humerus rotate, the mobile component 4 can rotate about the center of the spherical end 16 of the humeral pulley 3 by the concave arc 11 cooperating with the spherical end 16. The center of the lower end of the lining 6 is sunken upwards to form a socket 12, the socket 12 is used for accommodating a head of a radius 8, and the head of the radius 8 moves in the socket 12.

The locking ring 9 is an annular structure with a through opening 13 at the center, and an opening 15 is vertically formed in one side of the locking ring 9. The head 8 of the radius on the radius handle 2 passes through the opening 13 at the center of the locking ring 9 upwards and then is clamped in the concave socket 12 of the lining 6. The locking ring 9 plays a role in preventing the radial stem 2 from being separated from the movable part 4, so that the joint connecting mechanism of the utility model can bear higher load and has stronger stability.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.

Claims

1. An articulating mechanism, comprising: including elbow joint prostheses; the elbow joint prosthesis comprises a humerus handle (1), a radius handle (2) and a movable part (4), wherein the humerus handle (1) is connected with a humerus, and the radius handle (2) is connected with a radius (5); the humerus pulley (3) is arranged at the lower end of the humerus handle (1), the movable part (4) is connected with the spherical end (16) of the humerus pulley (3), and the movable part (4) is arranged at the upper end of the radius handle (2); the humerus handle (1) is movably connected with the radius handle (2) through a movable part (4);

a radius head (8) is fixedly arranged at the upper end of the radius handle (2), a positioning ring sheet (10) is arranged below the radius head (8), and the positioning ring sheet (10) is fixed at the upper part of the radius handle (2);

the movable part (4) comprises a lining (6), a locking ring (9) and a metal cup (7); the metal cup (7) is of a hollow cylindrical structure, and the lining (6) and the locking ring (9) are respectively arranged on the upper side and the lower side of the interior of the metal cup (7);

the upper end of the lining (6) is downwards sunken to form a concave arc surface (11); the center of the lower end of the lining (6) is sunken upwards to form a concave mortar (12); the locking ring (9) is an annular structure with a through hole (13) in the center;

the head of the radius (8) on the radius handle (2) passes through the through hole (13) in the center of the locking ring (9) upwards and then is clamped in the concave mortar (12) of the lining (6).

2. The articulating mechanism of claim 1, wherein: the upper end of the lining (6) protrudes outwards along the circumference to form a flange (14), and the lower end of the flange (14) is connected with the upper end of the metal cup (7).

3. The articulating mechanism of claim 1, wherein: one side of the locking ring (9) is vertically provided with an opening (15).

4. The articulating mechanism of claim 1, wherein: the lower end of the radius head (8) is spaced from the positioning ring sheet (10).

5. The articulating mechanism of claim 1, wherein: the upper end opening of the metal cup (7) is larger than the lower end opening thereof.