CN2376873Y - Double-side locking type screw - Google Patents
Double-side locking type screw Download PDFInfo
- Publication number
- CN2376873Y CN2376873Y CN 99228223 CN99228223U CN2376873Y CN 2376873 Y CN2376873 Y CN 2376873Y CN 99228223 CN99228223 CN 99228223 CN 99228223 U CN99228223 U CN 99228223U CN 2376873 Y CN2376873 Y CN 2376873Y
- Authority
- CN
- China
- Prior art keywords
- lock pin
- tear strip
- lock core
- lock
- utility
- 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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- Portable Nailing Machines And Staplers (AREA)
Abstract
The utility model relates to the technical field of an orthopaedics surgical instrument, particularly the technical field of an instrument for femur and neck fracture. The utility model comprises a lock pin and a lock core; the lock pin is of a tear strip shape; both sides at the upper part of a lock pin body are provided with fixed wings for preventing rotation; the lock core is a cylinder; the lock core is provided with a slide way corresponding to the tear strip of the lock pin; the tail part of the slide way is provided with an oblique wedge; the width of a notch at the tail part of the slide way is slightly larger than the width of the tear strip of the lock pin. The utility model can prevent a fixed steel nail from sliding out, as well as can prevent the steel nail from rotating, and has the advantages of original and reasonable conception, convenient operation and good effect.
Description
This utility model relates to the bone surgery set technical field, relates in particular to fracture of femoral neck technique with the apparatus field.
Fracture of femoral neck, the Clinical Processing method is more at present, and a kind of is traditional bed traction method, and this method bed rest time is long, and healing rate is low, and complication is many, brings very big difficulty for patient family.Also have a kind of method that adopts many pieces of Kirschner wire internal fixation, though the operation of this method is simple, fixedly strength is not enough, and effect is undesirable.Also have a kind of employing three wing nail to fix, this steel nail smooth outer surface, along with the activity of lower limb, steel nail can skid off, and causes fixing loosening.Also having a kind of is to adopt the drive screw internal fixation, this method, though overcome the slip of steel nail, because the anti-rotation effect of fracture is poor, so fixed effect is still undesirable.
The purpose of this utility model is to provide a kind of above-mentioned defective that overcomes, and can prevent slippage, prevents the double-vane locking-type drive screw of steel nail rotation again.
Now be described in detail the technical solution of the utility model
This utility model comprises lock pin and lock core, and lock pin is the opening strip, and lock pin body both sides are provided with and prevent the fixed-wing that rotates, lock core is a garden post, lock core is provided with the chute of corresponding lock pin tear strip, and the chute afterbody is provided with wedge, and the width of chute afterbody notch is slightly larger than the width of lock pin tear strip.
The lock core head is provided with external screw thread, and the lock pin head is provided with female thread.
This utility model is because the lock pin setting is tear strip, be provided with two chutes corresponding on the lock core with tear strip, again because the effect of the wedge of chute afterbody, when tear strip and chute locking, this moment, tear strip extended to both sides, formed the del chucking, can prevent that steel nail from skidding off, again owing in both sides, lock pin body middle part double-vane is set, steel nail has very strong anti-turning effort, and operation technique is simple and convenient simultaneously.
Accompanying drawing 1 is a structural representation of the present utility model;
1 is lock core, the 2nd among the figure, fixed-wing, the 3rd, fixed-wing, the 4th, tear strip, the 5th, tear strip, the 6th, lock pin.
Accompanying drawing 2 is a detent configuration sketch map of the present utility model
Accompanying drawing 3 is this utility model lock core structure sketch map;
7 is chutes among the figure.
Accompanying drawing 4 is side views of Fig. 3.
Introduce embodiment in conjunction with the accompanying drawings:
As scheme institute and look, this utility model comprises lock pin and lock core, and lock pin 6 tops are the opening strip, and the both sides, middle part are provided with and prevent the fixed-wing 2 and 3 that rotates on the lock pin 6, lock core 1 is a Cylinder, lock core 1 is provided with the chute 7 of corresponding lock pin tear strip 4,5, and the afterbody of chute 7 is provided with wedge, when tear strip 4,5 inserts chutes 7 back forward impelling, along with the gradient of wedge by the end to height, during to the top, tear strip is pushed to both sides, and steel nail is upside-down triangle shape at this moment.The width of chute 7 afterbodys top notch is slightly larger than the width of lock pin tear strip, is convenient to skidding off of tear strip.
Be provided with external screw thread at lock core 1 head, the root of lock pin 6 is provided with female thread, when being convenient to operation technique, and the controlling of special instrument.
Claims (2)
1, a kind of double-vane locking-type drive screw, it is characterized in that, it comprises lock pin and lock core, lock pin is the opening strip, both sides, lock pin body top are provided with and prevent the fixed-wing that rotates, and lock core is a garden post, and lock core is provided with the chute of corresponding lock pin tear strip, the chute afterbody is provided with wedge, and the width of chute afterbody notch is slightly larger than the width of lock pin tear strip.
2, biplane drive screw according to claim 1 is characterized in that, the lock core head is established external screw thread, and the lock pin head is provided with female thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228223 CN2376873Y (en) | 1999-04-28 | 1999-04-28 | Double-side locking type screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228223 CN2376873Y (en) | 1999-04-28 | 1999-04-28 | Double-side locking type screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2376873Y true CN2376873Y (en) | 2000-05-10 |
Family
ID=34017639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99228223 Expired - Fee Related CN2376873Y (en) | 1999-04-28 | 1999-04-28 | Double-side locking type screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2376873Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103860252A (en) * | 2014-03-07 | 2014-06-18 | 中国人民解放军第四军医大学 | Medical anchor type cancellous bone screw |
| CN106725786A (en) * | 2017-03-03 | 2017-05-31 | 叶川 | Anti- rotation Kirschner wire |
-
1999
- 1999-04-28 CN CN 99228223 patent/CN2376873Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103860252A (en) * | 2014-03-07 | 2014-06-18 | 中国人民解放军第四军医大学 | Medical anchor type cancellous bone screw |
| CN106725786A (en) * | 2017-03-03 | 2017-05-31 | 叶川 | Anti- rotation Kirschner wire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |