CN201267523Y - Internal quadrangle bone-knitting screw - Google Patents
Internal quadrangle bone-knitting screw Download PDFInfo
- Publication number
- CN201267523Y CN201267523Y CNU2008201728995U CN200820172899U CN201267523Y CN 201267523 Y CN201267523 Y CN 201267523Y CN U2008201728995 U CNU2008201728995 U CN U2008201728995U CN 200820172899 U CN200820172899 U CN 200820172899U CN 201267523 Y CN201267523 Y CN 201267523Y
- Authority
- CN
- China
- Prior art keywords
- screw
- angle
- interior
- inner angle
- bone
- Prior art date
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to an inner square socket bone screw which comprises a screw cap and a screw body. The bone screw is characterized in that the inner angle of the screw cap is in the shape of a square socket, and an inner inclined surface is arranged on the upper edge of the inner angle. The angle of the inner angle is over large, and the hexagon socket screw is easy to slip, so the screw driver has too small resistance with the inner angle of the screw cap when in rotation, and the screw slippage phenomenon is easy to occur. The utility model has the advantages that the angle of the inner angle is reduced, the resistance between the screw driver and the inner angle of the screw cap when in rotation is increased during the taking out process, the occurrence of the screw slippage phenomenon is reduced, the pain of patients is reduced, and the workload of medical staff is lightened.
Description
Technical field
This utility model relates to a kind of medical apparatus, specifically a kind of interior four corner connection bone screw.
Background technology
At present, known orthopaedics is used for fixing the screw of steel plate, its head of a nail all is interior hexagon, find that in clinical practice this interior hexagonal screw is very easy to stripped thread, particularly particularly serious in the taking-up process, both prolong operating time, increased patient's misery, increased medical personnel's workload again.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art.This utility model provides a kind of interior four corner connection bone screw, and this bone screw is simple in structure, and is easy to use, and stripped thread can not occur.
The technical scheme that its technical problem that solves this utility model adopts is: four corner connection bone screw in a kind of, and it comprises the head of a nail and nail body, it is characterized in that; Head of a nail interior angle is interior quadrangle, and the interior angle top is provided with interior inclined-plane.Why interior hexagon screw the stripped thread phenomenon occurs easily, is exactly because the angle of its interior angle is excessive, cause in the taking-up process, during the screwdriver rotation and the resistance of head of a nail interior angle too little, so occur the stripped thread phenomenon easily.
The beneficial effects of the utility model are: dwindled the angle of interior angle, increased in the taking-up process, the resistance of screwdriver when rotation and head of a nail interior angle has reduced the generation that the stripped thread phenomenon occurs, has reduced patient's misery, has alleviated medical personnel's workload again.
Description of drawings
Below in conjunction with accompanying drawing this utility model is further specified.
Accompanying drawing is the structural representation of this utility model embodiment.
Among the figure, the 1. head of a nail, 2. interior angle, 3. in inclined-plane, 4. nail body.
The specific embodiment
In the drawings, a kind of interior four corner connection bone screw, it comprises the head of a nail 1 and nail body 4, it is characterized in that; The head of a nail 1 interior angle 2 is interior quadrangles, and interior angle 2 tops are provided with interior inclined-plane 3.Why interior hexagon screw the stripped thread phenomenon occurs easily, is exactly because the angle of its interior angle 2 is excessive, cause in the taking-up process, during the screwdriver rotation and the resistance of head of a nail interior angle too little, so occur the stripped thread phenomenon easily.
Claims (1)
1. four corner connection bone screw in a kind, it comprises the head of a nail and nail body, it is characterized in that; Head of a nail interior angle is interior quadrangle, and the interior angle top is provided with interior inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201728995U CN201267523Y (en) | 2008-10-09 | 2008-10-09 | Internal quadrangle bone-knitting screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201728995U CN201267523Y (en) | 2008-10-09 | 2008-10-09 | Internal quadrangle bone-knitting screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201267523Y true CN201267523Y (en) | 2009-07-08 |
Family
ID=40840100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201728995U Expired - Fee Related CN201267523Y (en) | 2008-10-09 | 2008-10-09 | Internal quadrangle bone-knitting screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201267523Y (en) |
-
2008
- 2008-10-09 CN CNU2008201728995U patent/CN201267523Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20091109 |