CN210384115U - Elbow joint - Google Patents
Elbow joint Download PDFInfo
- Publication number
- CN210384115U CN210384115U CN201920601445.3U CN201920601445U CN210384115U CN 210384115 U CN210384115 U CN 210384115U CN 201920601445 U CN201920601445 U CN 201920601445U CN 210384115 U CN210384115 U CN 210384115U
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- CN
- China
- Prior art keywords
- pair
- elbow joint
- subassembly
- ulna
- joint according
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- 210000002310 elbow joint Anatomy 0.000 title claims abstract description 37
- 210000000623 ulna Anatomy 0.000 claims abstract description 27
- 210000002758 humerus Anatomy 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 7
- 210000000784 arm bone Anatomy 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 description 15
- 230000037431 insertion Effects 0.000 description 15
- 238000005299 abrasion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- Prostheses (AREA)
Abstract
The utility model discloses an elbow joint, including upper arm bone subassembly and ulna subassembly, the ulna subassembly passes through axial region swing joint and is in on the upper arm bone subassembly, still include elasticity embedding device, elasticity embedding device sets up inside the ulna subassembly, elasticity embedding device includes a pair of main part and a dead lever, wherein, the axial region includes a pair of hemispheroid, and a pair of hemispheroid is installed respectively on a pair of communications tilt arm, the upper arm bone subassembly has a pair of first recess, a pair of first recess respectively with a pair of hemispheroid movable fit that corresponds, the upper arm bone subassembly with the ulna subassembly passes through axial region swing joint, has higher stability and associativity, the inside elasticity embedding device that is equipped with of ulna subassembly makes to connect and more closely improves elbow joint's flexibility, increases elbow joint's life.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to elbow joint.
Background
When the elbow joint is injured by rheumatism, a deformed joint, or trauma, the function of the elbow joint is lost and severe pain is felt. In this case, in order to restore the elbow function, an artificial elbow replacement operation is required. In some bone surgery, it is often necessary to employ external fixation brackets for fracture fixation or distraction. At present, the common method is to use plaster and splint to fix the operation position in a closed way, or to use a joint fixing bracket to fix the operation position relatively, and the plaster fixation makes the movement of the patient after the operation very inconvenient. Most of them are artificial elbow joints formed by mechanically connecting humeral components and ulnar components by means of a hinge mechanism or the like. However, these artificial elbow joints are not provided with a supporting mechanism and a protecting mechanism, and the humeral component and the ulnar component loosen or displace along with the increase of the using time, thereby affecting the normal elbow joint movement of the patient. Although the elbow joint replacement prosthesis conforms to the daily behavior and motion characteristics of a human body, the initial stability and the combination stability of the humerus component and the ulna component are not high, the stress is unreasonable, and the flexibility is not enough, so that the service life of the elbow joint replacement prosthesis is not long.
Accordingly, there is a need for an elbow replacement prosthesis that is stable, long lasting, and flexible.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a stable, long-lived and nimble elbow joint can move about.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an elbow joint, includes upper arm bone subassembly and ulna subassembly, the ulna subassembly passes through axial region swing joint and is in on the upper arm bone subassembly, still include elasticity embedding device, elasticity embedding device sets up inside the ulna subassembly, elasticity embedding device includes a pair of main part and a dead lever, and a pair of main part is all fixed to be set up on the dead lever, inside activity stopper, guiding axle, spring and the a plurality of ball of being equipped with of main part, the activity of activity stopper sets up in the piston hole of main part, the guiding axle is fixed on the activity stopper, the spring housing is in on the guiding axle, and be located the activity stopper with between the interior shoulder surface of main part, a plurality of ball activity is inlayed on the outer terminal surface of main part, and keep out on the slope arm of ulna subassembly.
Furthermore, the front end of each guide shaft is provided with a hemispherical convex block, and the hemispherical convex blocks of the two guide shafts are mutually abutted.
Furthermore, a guide shaft section at the rear end of the guide shaft is movably arranged in the guide hole of the main body.
Furthermore, the pair of main bodies are fixedly arranged in the fixing sleeves of the fixing rods.
Furthermore, the pair of main bodies are fixedly arranged in fixing sleeves at the upper ends of the fixing rods.
Furthermore, the lower end of the fixing rod is connected to the ulna rod of the ulna component (20) through a pin hole.
Further, the spring is received in an inner hole in the middle of the body.
Further, the shaft portion includes a pair of hemispheres mounted on the pair of inclined arms, respectively.
Furthermore, the humerus assembly is provided with a pair of first grooves which are respectively movably matched with the corresponding pair of hemispheres.
Furthermore, the eccentricity of the axis of the shaft part relative to the axis of the main body is 0.05 mm-0.15 mm.
According to the above technical solution, the utility model has the advantages that: the humerus component and the ulna component are movably connected through the shaft part, and the elastic embedding device is arranged, so that the shaft part has higher stability and associativity, and the service life of the utility model is longer; the resilient insert means provided inside the ulnar assembly also makes the connection tighter and further improves the flexibility of the elbow joint.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of the humeral assembly of the present invention.
Figure 3 is an enlarged view of the ulnar assembly of the present invention.
Fig. 4 is an enlarged view of the elastic insert device of the present invention.
Labeled as: humeral assembly 10, first recess 11, humeral stem 12, active cavity 14, ulnar assembly 20, resilient insertion device 21, main body 211, spring 2111, ball 2112, active plug 213, guide shaft 214, hemispherical protrusion 2141, guide shaft segment 215, guide hole 216, fixation sleeve 217, fixation rod 218, pin hole 219, ulnar stem 22, tilt arm 221, hemisphere 23, fixation pin 24, locking screw 25, top arc 26, second recess 27.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 4, the elbow joint shown in fig. 1, 2 and 3 includes a humerus assembly 10 and an ulna assembly 20, the ulna assembly 20 is movably connected to the humerus assembly 10 through a shaft portion, the shaft portion includes a pair of hemispheroids 23, the pair of hemispheroids 23 are respectively installed on a pair of inclined arms 221, a pair of first grooves 11, a humerus rod 12 and a movable cavity 14 are arranged on the humerus assembly 10, the pair of first grooves 11 are respectively movably matched with the corresponding pair of hemispheroids 23, the ulna assembly 20 further includes an ulna rod 22, an inclined arm 221, a hemispheroid 23, a fixing pin 24, a locking screw 25, a top arc surface 26 and a second groove 27.
The pair of hemispheroids 23 are respectively installed on the pair of inclined arms 221 and are locked and fixed by the locking screws 25, the top arc surface 26 is positioned at the tops of the pair of inclined arms 221, and the pair of first grooves 11 are respectively in movable fit with the corresponding pair of hemispheroids 23, so that the humeral component and the ulnar component are movably connected through a shaft part, and high stability and binding property are achieved; the humeral component 10 and ulnar component 20 combination also includes a motion cavity 14, and when the humeral component 10 and the ulnar component 20 are combined to move, the motion cavity 14 can keep the motion of the ulnar component 20 to the maximum extent, and the abrasion between the ulnar component 20 and the humeral component 10 is avoided, so that the service life of the elbow joint is longer.
As shown in fig. 1 and 4, the elastic insertion means 21 is provided inside the ulnar module 20, the elastic insertion means 21 includes a pair of bodies 211 and a fixing rod 218, the pair of bodies 211 are fixedly provided on the fixing rod 218, the main body 211 is internally provided with a movable plug 213, a guide shaft 214, a spring 2111 and a plurality of balls 2112, the movable plug 213 is movably arranged in a piston hole of the main body 211, the guide shaft 214 is fixed on the movable plug 213, the spring 2111 is accommodated in an inner hole in the middle of the main body 211, and the spring 2111 is sleeved on the guide shaft 214 and is positioned between the movable plug 213 and the inner shoulder surface of the main body 211, a plurality of balls 2112 are movably embedded on the outer end surface of the main body 211 and are resisted on the inclined arm 221 of the ulna component 20, and the number of the balls 2112 is generally 6 or 8.
The front end of the guiding shaft 214 is provided with a hemispherical convex block 2141, the hemispherical convex blocks 2141 of the two guiding shafts 214 are mutually butted, the guiding shaft section 215 at the rear end of the guiding shaft 214 is movably arranged in the guiding hole 216 of the main body 211, and the large ends of the pair of main bodies 211 are fixedly arranged in the fixing sleeve 217 of the fixing rod 218.
Preferably, the large ends of the pair of bodies 211 are fixedly disposed in fixing sleeves 217 at the upper ends of the fixing rods 218.
The fixing rod 218 is inserted into the second groove 27, connected to the ulnar stem 22 through a pin hole 219, and fixed by a fixing pin 24, the movable plug 213 and the guide shaft 214 are welded together, when the ulnar assembly 20 and the humeral assembly 10 move in combination, the welded whole of the movable plug 213 and the guide shaft 214 inside the elastic insertion device 21 moves outwards along the axis B of the main body 211, the spring 2111 exerts a reaction force, so that the elastic insertion device 21 can freely expand and contract, during the movement of the humeral assembly 10 and the ulnar assembly 20, the elastic insertion device 21 slightly expands outwards and abuts against the inclined arm 221, so that the humeral assembly 10 and the ulnar assembly 20 are combined with high stability, and the assembly is prevented from being loosely fitted, during the movement of the elbow joint, the force applied to the elbow joint increases, the outward expansion range of the elastic insertion means 21 increases, and the force applied to the tilt arm 221 increases, so that the elbow joint has high flexibility during exercise.
The eccentricity of the axis H of the shaft portion with respect to the axis B of the body 211 is 0.05mm to 0.15 mm.
Preferably, the eccentricity is 0.06 mm.
The arrangement of the above-mentioned eccentricity makes the elastic insertion device 21 can support the tilting arm 221 outwards, and can also buffer the inward lateral force from the tilting arm 221, further prolonging the service life of the present invention.
Example two
Referring to fig. 1 to 4, an elbow joint as shown in fig. 1, 2 and 3 comprises a humerus assembly 10 and an ulna assembly 20, wherein the ulna assembly 20 is movably connected to the humerus assembly 10 through a shaft portion, the shaft portion comprises a pair of hemispheroids 23, the pair of hemispheroids 23 are respectively installed on a pair of inclined arms 221, the humerus assembly 10 is provided with a pair of first grooves 11, a humerus rod 12 and a movable cavity 14, the pair of first grooves 11 are respectively movably matched with the corresponding pair of hemispheroids 23, the pair of first grooves 11 are actually matched with the pair of hemispheroids 23, so that the flexible rotation is facilitated, meanwhile, a matching gap between the first grooves 11 and the pair of hemispheroids 23 must be properly selected, so that the flexible rotation of the elbow joint is facilitated, the ulna assembly 20 further comprises an ulna rod 22, an inclined arm 221, a hemispheroids 23, a fixing pin 24, a locking screw 25, a top cambered surface 26 and a second groove 27, the pair of hemispheroids 23 are, the locking screw 25 is used for locking and fixing, the top arc surface 26 is positioned at the top of the pair of inclined arms 221, and the pair of first grooves 11 are respectively in movable fit with the corresponding pair of hemispheroids 23, so that the humerus component and the ulna component are connected in a movable fit manner through the shaft part, and high stability and associativity are achieved; the humeral component 10 and ulnar component 20 combination also includes a motion cavity 14, and when the humeral component 10 and the ulnar component 20 are combined to move, the motion cavity 14 can keep the motion of the ulnar component 20 to the maximum extent, and the abrasion between the ulnar component 20 and the humeral component 10 is avoided, so that the service life of the elbow joint is longer.
As shown in fig. 1 and 4, the elastic insertion device 21 is disposed inside the ulnar component 20, the elastic insertion device 21 includes a pair of main bodies 211 and a fixing rod 218, the pair of main bodies 211 are fixedly disposed on the fixing rod 218, a movable plug 213, a guide shaft 214, a spring 2111 and a plurality of balls 2112 are disposed inside the main body 211, the movable plug 213 is movably disposed in a piston hole of the main body 211, the guide shaft 214 is fixed on the movable plug 213, the spring 2111 is received in an inner hole in the middle of the main body 211, the spring 2111 is sleeved on the guide shaft 214 and located between the movable plug 213 and an inner shoulder surface of the main body 211, the plurality of balls 2112 are movably embedded on an outer end surface of the main body 211 and abut against an inclined arm 221 of the ulnar component 20, and the number of balls 2112 is generally 12 or 16, this reduces the damage of the balls 2112 to the surface of the tilt arm 221, and improves the service life of the entire joint.
The front end of the guiding shaft 214 is provided with a hemispherical convex block 2141, the hemispherical convex blocks 2141 of the two guiding shafts 214 are mutually butted, the guiding shaft section 215 at the rear end of the guiding shaft 214 is movably arranged in the guiding hole 216 of the main body 211, and the large ends of the pair of main bodies 211 are fixedly arranged in the fixing sleeve 217 of the fixing rod 218.
Preferably, the large ends of the pair of bodies 211 are fixedly disposed in fixing sleeves 217 at the upper ends of the fixing rods 218.
The fixing rod 218 is inserted into the second groove 27, connected to the ulnar stem 22 through a pin hole 219, and fixed by a fixing pin 24, the movable plug 213 and the guide shaft 214 are welded together, when the ulnar assembly 20 and the humeral assembly 10 move in combination, the welded whole of the movable plug 213 and the guide shaft 214 inside the elastic insertion device 21 moves outwards along the axis B of the main body 211, the spring 2111 exerts a reaction force, so that the elastic insertion device 21 can freely expand and contract, during the movement of the humeral assembly 10 and the ulnar assembly 20, the elastic insertion device 21 slightly expands outwards and abuts against the inclined arm 221, so that the humeral assembly 10 and the ulnar assembly 20 are combined with high stability, and the assembly is prevented from being loosely fitted, during the movement of the elbow joint, the force applied to the elbow joint increases, the outward expansion range of the elastic insertion means 21 increases, and the force applied to the tilt arm 221 increases, so that the elbow joint has high flexibility during exercise.
The eccentricity of the axis H of the shaft portion with respect to the axis B of the body 211 is 0.05mm to 0.15 mm.
Preferably, the eccentricity is 0.05 mm.
More preferably, the eccentricity is 0.10 mm.
The arrangement of the above-mentioned eccentricity makes the elastic insertion device 21 can support the tilting arm 221 outwards, and can also buffer the inward lateral force from the tilting arm 221, further prolonging the service life of the present invention.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an elbow joint, includes humerus subassembly (10) and ulna subassembly (20), ulna subassembly (20) through axial region swing joint in on the humerus subassembly (10), its characterized in that still includes elasticity embedded device (21), elasticity embedded device (21) set up inside ulna subassembly (20), elasticity embedded device (21) include a pair of main part (211) and a dead lever (218), and a pair of main part (211) all is fixed to be set up on dead lever (218), main part (211) inside is equipped with movable stopper (213), guiding axle (214), spring (2111) and a plurality of ball (2112), activity of movable stopper (213) sets up in the piston hole of main part (211), guiding axle (214) are fixed on movable stopper (213), spring (2111) cover on guiding axle (214), And is positioned between the movable plug (213) and the inner shoulder surface of the main body (211), and a plurality of balls (2112) are movably embedded on the outer end surface of the main body (211) and are resisted on the inclined arm (221) of the ulna component (20).
2. The elbow joint according to claim 1, wherein the front end of the guide shaft (214) has a hemispherical protrusion (2141), and the hemispherical protrusions (2141) of the two guide shafts (214) interfere with each other.
3. The elbow joint according to claim 1, wherein the guide shaft section (215) at the rear end of the guide shaft (214) is movably disposed in the guide hole (216) of the main body (211).
4. The elbow joint according to claim 1, wherein a pair of bodies (211) are each fixedly disposed within a retaining sleeve (217) of the retaining rod (218).
5. The elbow joint according to claim 1, wherein a pair of bodies (211) are each fixedly disposed in a fixing sleeve (217) at an upper end of the fixing rod (218).
6. The elbow joint of claim 5, wherein the lower end of the fixing rod (218) is connected to the ulnar stem (22) of the ulnar assembly (20) by a pin hole (219).
7. The elbow joint according to claim 1, characterized in that the spring (2111) is housed in an internal hole in the middle of the body (211).
8. The elbow joint according to claim 1, wherein the shaft portion comprises a pair of hemispheres (23), the pair of hemispheres (23) being mounted on a pair of inclined arms (221), respectively.
9. The elbow joint according to claim 8, characterised in that the humeral component (10) has a pair of first recesses (11), the pair of first recesses (11) being in a movable fit with a corresponding pair of hemispheres (23), respectively.
10. The elbow joint according to claim 1, wherein the eccentricity of the axis (H) of the shaft portion with respect to the axis (B) of the body (211) is 0.05mm to 0.15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920601445.3U CN210384115U (en) | 2019-04-29 | 2019-04-29 | Elbow joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920601445.3U CN210384115U (en) | 2019-04-29 | 2019-04-29 | Elbow joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210384115U true CN210384115U (en) | 2020-04-24 |
Family
ID=70345054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920601445.3U Withdrawn - After Issue CN210384115U (en) | 2019-04-29 | 2019-04-29 | Elbow joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210384115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109966031A (en) * | 2019-04-29 | 2019-07-05 | 中南大学湘雅医院 | A kind of elbow joint |
-
2019
- 2019-04-29 CN CN201920601445.3U patent/CN210384115U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109966031A (en) * | 2019-04-29 | 2019-07-05 | 中南大学湘雅医院 | A kind of elbow joint |
| CN109966031B (en) * | 2019-04-29 | 2024-07-23 | 中南大学湘雅医院 | Elbow joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200424 Effective date of abandoning: 20240723 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200424 Effective date of abandoning: 20240723 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |