CN204618387U - A kind of fixed screw at orthopedics department - Google Patents
A kind of fixed screw at orthopedics department Download PDFInfo
- Publication number
- CN204618387U CN204618387U CN201520138740.1U CN201520138740U CN204618387U CN 204618387 U CN204618387 U CN 204618387U CN 201520138740 U CN201520138740 U CN 201520138740U CN 204618387 U CN204618387 U CN 204618387U
- Authority
- CN
- China
- Prior art keywords
- screw
- thread segment
- orthopedics department
- fixed screw
- nut
- 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
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Abstract
A kind of fixed screw at orthopedics department, comprise nut and screw rod, be provided with groove bottom wherein said nut, described screw rod is made up of the first thread segment and the second thread segment, and the second described thread segment is arranged by cutting edge and forms helicitic texture.This utility model bolt structure advantages of simple, can avoid skeleton to ftracture due to the propelling of screw effectively, significant to the rehabilitation of patient.
Description
Technical field
This utility model belongs to technical field of medical instruments, is specifically related to a kind of fixed screw at orthopedics department.
Background technology
Bone screw is ingredient important in orthopedic medical device, often need to utilize blade plate and bone screw to implement fixing to fracture site in bone surgery, the bone screw great majority of current use adopt helicitic texture, when screw advances in skeleton, skeletogenous expansion can be made, even make the serious consequence of skeletogenous cracking, the wound of making patients.
Improvement at present for bone screw mainly concentrates on how to strengthen constant intensity, and for the expansion tension how reducing to produce in the progradation of screw, avoids causing the linguistic term of skeleton cracking aspect to yet there are no relevant report.
Utility model content
The purpose of this utility model is to provide a kind of fixed screw at orthopedics department, and this screw can avoid skeleton to play drum cracking in the process advanced, and screw in only needs very little moment of torsion simultaneously.
This utility model realizes especially by following technical scheme:
A kind of fixed screw at orthopedics department, comprise nut and screw rod, be provided with groove bottom wherein said nut, described screw rod is made up of the first thread segment and the second thread segment, and the second described thread segment is arranged by cutting edge and forms helicitic texture.
Slot opening described in the utility model spread configuration in the counterclockwise direction.
First thread segment flight pitch described in the utility model is less than the helicitic texture that cutting edge is formed.
This utility model hold-down screw screw diameter increases along free end gradually to nut direction.
The beneficial effects of the utility model are: the cutting edge that screw free end is arranged can well play shear action to skeleton in progradation, avoid skeleton swelling cracking, effectively reduce moment of torsion simultaneously, can twist with very little active force, also serve the effect of protection skeleton; The groove structure set up bottom nut can avoid patient to cause screw to slide at active procedure, avoids producing displacement, causes the consequence of skeleton abnormity.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model hold-down screw;
Fig. 2 is this with the novel structural representation with determining nut in screw;
Fig. 3 is the structural representation of this utility model second thread segment cross section;
Indicate in accompanying drawing and illustrate: 1 nut, 2 screw rods, 11 grooves, 21 first thread segments, 22 second thread segments, 23 cutting edges.
Detailed description of the invention
Below in conjunction with drawings and Examples, wooden utility model fixed screw at orthopedics department is made further explanation and description, as shown in FIG. 1 to 3.
A kind of fixed screw at orthopedics department, comprise nut 1 and screw rod 2, wherein be provided with groove 11 bottom nut 1, screw rod 2 is made up of the first thread segment 21 and the second thread segment 22, second thread segment 22 is arranged by cutting edge 23 and forms helicitic texture, cutting edge 23 can well produce shear action at progradation leaf to skeleton surrounding, be easy to piercing of screw, reduce the expansion to skeleton, avoid ftractureing due to tension force when screw advances to skeleton, effectively reduce moment of torsion simultaneously, can twist with very little active force, also can avoid because ambassador's skeleton of exerting oneself produces displacement, cause skeleton abnormity.
Groove 11 opening spread configuration in the counterclockwise direction bottom this fixed screw at orthopedics department nut 1, arranging of groove 11 can prevent patient from active procedure, causing screw to slide, thus plays a protective role to the correction of skeleton.
This fixed screw at orthopedics department screw rod 2 diameter increases along free end gradually to nut 1 direction, and the first thread segment 21 flight pitch is less than the helicitic texture that cutting edge 23 is formed, this structure the fastening dynamics can strengthening screw is set, improve the constant intensity of skeleton.
The above embodiment is only further illustrate of the present utility model, not other forms of restriction is done to this utility model, this utility model also can have other various embodiments, when not deviating from this utility model spirit and essence thereof, those of ordinary skill in the art can make various corresponding change and distortion according to this utility model, but the guarantor that these changes accordingly and distortion all should belong to this utility model claim expands scope.
Claims (4)
1. a fixed screw at orthopedics department, comprise nut (1) and screw rod (2), it is characterized in that: described nut (1) bottom is provided with groove (11), described screw rod (2) is made up of the first thread segment (21) and the second thread segment (22), and described the second thread segment (22) is arranged by cutting edge (23) and forms helicitic texture.
2. a kind of fixed screw at orthopedics department according to claim 1, is characterized in that: described groove (11) opening spread configuration in the counterclockwise direction.
3. a kind of fixed screw at orthopedics department according to claim 1, is characterized in that: described the first thread segment (21) flight pitch is less than the helicitic texture that cutting edge (23) is formed.
4. a kind of fixed screw at orthopedics department according to claim 1, is characterized in that: described screw rod (2) diameter increases along free end gradually to nut (1) direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520138740.1U CN204618387U (en) | 2015-03-12 | 2015-03-12 | A kind of fixed screw at orthopedics department |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520138740.1U CN204618387U (en) | 2015-03-12 | 2015-03-12 | A kind of fixed screw at orthopedics department |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204618387U true CN204618387U (en) | 2015-09-09 |
Family
ID=54037458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520138740.1U Expired - Fee Related CN204618387U (en) | 2015-03-12 | 2015-03-12 | A kind of fixed screw at orthopedics department |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204618387U (en) |
-
2015
- 2015-03-12 CN CN201520138740.1U patent/CN204618387U/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 | ||
| DD01 | Delivery of document by public notice |
Addressee: Xiong Mingyue Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Xiong Mingyue Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20160312 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |