CN204600652U - Lower binding formula Universal screw nail - Google Patents
Lower binding formula Universal screw nail Download PDFInfo
- Publication number
- CN204600652U CN204600652U CN201520286995.2U CN201520286995U CN204600652U CN 204600652 U CN204600652 U CN 204600652U CN 201520286995 U CN201520286995 U CN 201520286995U CN 204600652 U CN204600652 U CN 204600652U
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- Prior art keywords
- ball
- screw
- socket
- bulb
- collar
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Links
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 210000003692 ilium Anatomy 0.000 abstract description 5
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 239000007943 implant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
A kind of lower binding formula Universal screw nail, relate to technical field of medical instruments, comprise screw base and ball screw, connected lower ball-and-socket and upper ball-and-socket is provided with in the pilot hole of screw base bottom, the diameter of upper ball-and-socket is greater than lower ball-and-socket diameter, the bulb of ball screw is fitted in screw base by the pilot hole below lower ball-and-socket, in lower ball-and-socket, a side opening is provided with on the downside of the bulb of ball screw, there is elastic ball collar, what the bulb of ball screw matched with ball collar Internal Spherical Surface is assemblied in ball collar, the spherical outside surface of ball collar matches with lower ball-and-socket, the location pressure ring compressing bulb is provided with in the pilot hole on the bulb top of ball screw, the screw base inwall of U-lag both sides is provided with female thread.This utility model structure is simple, and easy to assembly, shaft diameter is large, pendulum angle is large, and ball collar contacts with the spherical surface of ball screw, uniform force, not easy fracture, stabilized structure, and the scope of application is wide, is particularly useful for ilium fixing operation.
Description
Technical field
The present invention relates to bone surgery technical field of medical instruments, say it is that a kind of structure is simple, easy to assembly in detail, shaft diameter is large, pendulum angle is large, the lower binding formula Universal screw nail of stabilized structure.
Background technology
We know, what the existing Universal screw nail for vertebral internal fixation was common is upper binding formula Universal screw nail, the structure of upper binding formula Universal screw nail: comprise screw base and ball screw, screw base top is provided with the U-lag wearing rod, longitudinally through installing hole is provided with in screw base, the hemispherical ball-and-socket that to match with the bulb of ball screw is provided with in the installing hole of screw base bottom, ball screw is arranged in screw base by above screw base through installing hole, the bulb of ball screw matches with the hemispherical ball-and-socket of screw base bottom, the location pressure ring compressing bulb is provided with in the installing hole on the bulb top of ball screw, the screw base inwall of U-lag both sides is provided with female thread, female thread can be provided with plug screw.Disclosed in State Intellectual Property Office, application number is: 201210026316.9, invention and created name is: a kind ofly the patent of invention patent application of Universal vertebral pedicle screw system of fine motion can namely describe the Universal screw nail of said structure, this kind of Universal screw nail is due to upper binding, the bulb of ball screw needs the installing hole through ball-and-socket top, in order to ensure overall intensity, installing hole is size-constrained, now, the bulb diameter of ball screw and shaft diameter all less; Because the ball-and-socket of screw base bottom matches with the bulb of ball screw, the aperture on the downside of ball-and-socket is less, and the pendulum angle of ball screw is little.Be not suitable for the operation such as ilium and need that pendulum angle is large, the occasion of shaft diameter uses.
State Intellectual Property Office's December in 2014 discloses a kind of name on the 17th and is called: the ilium nail of variable-angle, application number are: the utility model patent of 201420383030.0, although this patent discloses lower binding mode, but pendulum angle is little, shaft diameter is little shortcoming that it still exists, and because the screw sizes of bone surgery implant into body is less, disclosed this lower binding structure installment difficulty, during collar installation fee, effort, the bulb linear contact lay of collar and ball screw, local pressure ruptures greatly, easily.
Summary of the invention
The object of the invention is to solve above-mentioned the deficiencies in the prior art, provide a kind of structure simple, easy to assembly, shaft diameter is large, pendulum angle is large, the lower binding formula Universal screw nail of stabilized structure.
The present invention solves the technical scheme that above-mentioned the deficiencies in the prior art adopt:
A kind of lower binding formula Universal screw nail, comprise screw base and ball screw, screw base top is provided with the U-lag wearing rod, the screw base inwall of U-lag both sides is provided with female thread, longitudinally through pilot hole is provided with in screw base, connected lower ball-and-socket and upper ball-and-socket is provided with in the pilot hole that it is characterized in that screw base bottom, the diameter of upper ball-and-socket is greater than lower ball-and-socket diameter, the bulb of ball screw is fitted in screw base by the pilot hole below lower ball-and-socket, in lower ball-and-socket, a side opening is provided with on the downside of the bulb of ball screw, there is elastic ball collar, what the bulb of ball screw matched with ball collar Internal Spherical Surface is assemblied in ball collar, the spherical outside surface of ball collar matches with lower ball-and-socket, the location pressure ring compressing bulb is provided with in pilot hole above the bulb of ball screw.
Pilot hole diameter below lower ball-and-socket described in the present invention is not less than the bulb diameter of ball screw.
Compression plug screw is provided with in the screw base at the U-lag place described in the present invention.
The present invention assembles, press ball collar, make its reduced, load in lower ball-and-socket by the pilot hole below lower ball-and-socket, the bulb of ball screw is loaded in lower ball-and-socket by the pilot hole below lower ball-and-socket, now ball collar enters in ball-and-socket, continue upwards to push ball screw, ball collar struts by the bulb of ball screw, enter in upper ball-and-socket, and under ball collar is positioned at bulb, rear flank is shunk, entered lower ball-and-socket under the effect of natural resiliency.When ball screw bears downward axial tension, bulb can only extrude downwards, expand ball collar, and ball collar can not move upward, and when ball collar is adjacent to lower ball-and-socket, the diameter of its open lower side is less than bulb diameter, and bulb can not be deviate from, stabilized structure.Due to the existence of ball collar, increase the diameter of pilot hole lower port, and when ball screw swings, ball collar also can follow swing, increases the pendulum angle of ball screw, or can manufacture the ball screw of major diameter rivet nut, structure of the present invention is simple, and easy to assembly, shaft diameter is large, pendulum angle is large, ball collar contacts with the spherical surface of ball screw, uniform force, not easy fracture, stabilized structure, the scope of application is wide, is particularly useful for ilium fixing operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is ball collar structural representation of the present invention.
Fig. 3 is the structural representation of screw base of the present invention.
Structural representation when Fig. 4 is ball screw of the present invention swing.
Detailed description of the invention
Lower binding formula Universal screw nail as Figure 1-4, comprise screw base 2 and ball screw, screw base 2 top is provided with the U-lag wearing rod, longitudinally through pilot hole is provided with in screw base, connected lower ball-and-socket 9 and upper ball-and-socket 4 is provided with in the pilot hole of screw base 2 bottom, the diameter of upper ball-and-socket 4 is greater than lower ball-and-socket 9 diameter, and the pilot hole diameter below lower ball-and-socket is not less than the bulb diameter of ball screw.The bulb 6 of ball screw is fitted in screw base 2 by the pilot hole below lower ball-and-socket 9, in lower ball-and-socket 9, be provided with side on the downside of the bulb 6 of ball screw and be provided with opening 8, there is elastic ball collar 5, what the bulb 6 of ball screw matched with ball collar 5 Internal Spherical Surface is assemblied in ball collar 5, the spherical outside surface of ball collar 5 matches with lower ball-and-socket 9, ball collar rotates under the drive of ball screw in lower ball-and-socket, and prevents bulb from deviating from from the lower port of lower ball-and-socket.Be provided with the location pressure ring 3 compressing bulb in the pilot hole on the bulb top of ball screw, the screw base inwall of U-lag both sides is provided with female thread, is provided with and compresses plug screw 1 in the screw base at U-lag place.
The present invention is when assembling, pressing ball collar 5, make closed, the reduced of its opening 8, load in lower ball-and-socket by the pilot hole below lower ball-and-socket, the bulb of ball screw is loaded in lower ball-and-socket by the pilot hole below lower ball-and-socket, now ball collar enters in ball-and-socket, continue upwards to push ball screw, in the ball collar that ball collar struts by the bulb of ball screw, enter in upper ball-and-socket, under ball collar is positioned at bulb, rear flank is shunk, is entered lower ball-and-socket under the effect of natural resiliency, is squeezed between bulb and lower ball-and-socket inwall by bulb.When ball screw bears downward axial tension, bulb can only extrude downwards, expand ball collar, and ball collar can not move upward, and when ball collar is adjacent to lower ball-and-socket, the diameter of its open lower side is less than bulb diameter, and bulb can not be deviate from, stabilized structure.Due to the existence of ball collar, increase the diameter of pilot hole lower port, when ball screw swings, ball collar also can follow swing, increase the pendulum angle of ball screw, the rivet nut pendulum angle of the existing Universal screw nail for medical treatment is less than 50 degree, structure rivet nut 7 of the present invention can reach 80 degree, or the ball screw of major diameter rivet nut 7 can be manufactured, structure of the present invention is simple, easy to assembly, shaft diameter is large, pendulum angle is large, ball collar contacts with the spherical surface of ball screw, uniform force, not easy fracture, stabilized structure, the scope of application is wide, be particularly useful for ilium fixing operation.
Claims (3)
1. a lower binding formula Universal screw nail, comprise screw base and ball screw, screw base top is provided with the U-lag wearing rod, the screw base inwall of U-lag both sides is provided with female thread, longitudinally through pilot hole is provided with in screw base, connected lower ball-and-socket and upper ball-and-socket is provided with in the pilot hole that it is characterized in that screw base bottom, the diameter of upper ball-and-socket is greater than lower ball-and-socket diameter, the bulb of ball screw is fitted in screw base by the pilot hole below lower ball-and-socket, in lower ball-and-socket, a side opening is provided with on the downside of the bulb of ball screw, there is elastic ball collar, what the bulb of ball screw matched with ball collar Internal Spherical Surface is assemblied in ball collar, the spherical outside surface of ball collar matches with lower ball-and-socket, the location pressure ring compressing bulb is provided with in the pilot hole on the bulb top of ball screw.
2. lower binding formula Universal screw nail according to claim 1, is characterized in that the pilot hole diameter below described lower ball-and-socket is not less than the bulb diameter of ball screw.
3. lower binding formula Universal screw nail according to claim 1 and 2, is provided with compression plug screw in the screw base that it is characterized in that described U-lag place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520286995.2U CN204600652U (en) | 2015-05-06 | 2015-05-06 | Lower binding formula Universal screw nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520286995.2U CN204600652U (en) | 2015-05-06 | 2015-05-06 | Lower binding formula Universal screw nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204600652U true CN204600652U (en) | 2015-09-02 |
Family
ID=53953253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520286995.2U Active CN204600652U (en) | 2015-05-06 | 2015-05-06 | Lower binding formula Universal screw nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204600652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783885A (en) * | 2015-05-06 | 2015-07-22 | 山东威高骨科材料股份有限公司 | Lower screw assembly type universal screw |
-
2015
- 2015-05-06 CN CN201520286995.2U patent/CN204600652U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783885A (en) * | 2015-05-06 | 2015-07-22 | 山东威高骨科材料股份有限公司 | Lower screw assembly type universal screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xie Ning Inventor after: Wu Chunhui Inventor after: Gao Yajun Inventor after: Wang Han Inventor after: Kou Wanfu Inventor after: Wang Lijun Inventor before: Xie Ning Inventor before: Wu Chunhui Inventor before: Gao Yajun Inventor before: Wang Han Inventor before: Kou Wanfu Inventor before: Wang Lijun |
|
| CB03 | Change of inventor or designer information |