CN203710118U - Guiding screw for orthopaedics department - Google Patents
Guiding screw for orthopaedics department Download PDFInfo
- Publication number
- CN203710118U CN203710118U CN201420041613.5U CN201420041613U CN203710118U CN 203710118 U CN203710118 U CN 203710118U CN 201420041613 U CN201420041613 U CN 201420041613U CN 203710118 U CN203710118 U CN 203710118U
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- CN
- China
- Prior art keywords
- screw
- head
- guide part
- orthopaedics
- guiding
- 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
The utility model relates to a guiding screw for the orthopaedics department. The guiding screw comprises a screw body, the screw body comprises a head and a shaft, the shaft comprises a fixed portion and a guiding portion, the periphery of the fixed portion is provided with a thread, the guiding portion is an unthreaded shaft, and the diameter of the guiding portion is smaller than the outer diameter of the thread of the fixed portion. The guiding screw is convenient to place in, short in operation time, low in operation risk and convenient to operate. The head is provided with a head groove, a dovetail groove is arranged on the periphery of the head groove, a neck bush is detachably connected in the head groove and provided with a projection matched with the dovetail groove, and damage to the head of the screw in the process of taking and placing in the guiding screw is effectively avoided, and safety is high.
Description
Technical field
This utility model relates to a kind of medical instruments, specifically, relates to a kind of orthopaedics guider screw, belongs to armarium technical field.
Background technology
Femur for orthopaedics, tibial intramedullary nailing and near end of thighbone tuberosity part fracture all will be used tail nail with dynamic hip screw (DHS), and it act as and prevents that soft tissue from growing in rivet nut, so that get nail after union of fracture, DHS tail nail also has the effect of sliding and pressurizeing simultaneously.
At present, the great majority design of tail nail is the same with plain screw design, screw thread is covered with nail axle, in realizing process of the present invention, inventor finds at least to exist in prior art following problem: 1) screw front end has screw thread, thereby screw front end can insert after must be corresponding with intramedullary pin or dynamic hip screw (DHS) appropriate section good, otherwise can not insert, easily crash in surrounding tissue and make operation add an operation of looking for foreign body; 2) if screw placing direction is not right, be difficult to insert, in actual operation process, due to stopping of surrounding soft tissue, be difficult to accomplish accurate contraposition.Due to above reason, extended operating time, increased operation risk.
Utility model content
The technical problems to be solved in the utility model is for above deficiency, a kind of orthopaedics guider screw is provided, solved the defect that in prior art, operating time is long, operation risk is large, adopt after guider screw of the present utility model, have advantages of that operating time is short, operation risk is low, easy to operate.
For solving above technical problem, this utility model by the following technical solutions: a kind of orthopaedics guider screw, comprise screw body, screw body comprises head, it is characterized in that: described head bottom is provided with smooth guide part.
A prioritization scheme, is provided with fixed part between described guide part and head.
Another kind of prioritization scheme, the periphery of described fixed part is provided with screw thread.
Another prioritization scheme, the helical angle of described screw thread is 30 °.
Further prioritization scheme, the diameter of described guide part equates with the internal diameter of screw thread.
Prioritization scheme further, the length of described fixed part is the twice of guide part length.
Prioritization scheme further, the lower end of described guide part is provided with chamfering.
A prioritization scheme, described head is provided with the head recess of interior hexangle type;
The periphery of described head recess is provided with dovetail groove.
Another kind of prioritization scheme, is removably connected with neck bush in described head recess.
Another prioritization scheme, the periphery of described neck bush is provided with projection;
Described projection matches with dovetail groove.
This utility model adopts after above technical scheme, compared with prior art, have the following advantages: screw body comprises head and nail axle, nail axle comprises fixed part and guide part, fixed part periphery is provided with screw thread, guide part is optical axis, and the diameter of guide part is less than the major diameter of thread of fixed part, be convenient to insert, operating time is short, operation risk is low, easy to operate, head is provided with head recess, head recess periphery is provided with dovetail groove, in head recess, be removably connected with neck bush, neck bush is provided with the projection of mating with dovetail groove, effectively avoiding picking and placeing in guider screw process causes screw head to damage, safe.
Below in conjunction with drawings and Examples, this utility model is elaborated.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of screw body in this utility model embodiment;
Accompanying drawing 2 is structural representations of neck bush in this utility model embodiment;
In figure,
1-screw body, 11-head, 12-fixed part, 13-guide part, 14-screw thread, 15-chamfering, 16-head recess, 17-dovetail groove, 2-neck bush, 21-neck bush body, 22-projection.
The specific embodiment
Embodiment, as shown in Figure 1, a kind of orthopaedics guider screw, comprises screw body 1, and screw body 1 comprises head 11 and nail axle, and described nail axle comprises fixed part 12 and guide part 13, and the periphery of described fixed part 12 is provided with screw thread 14, and described guide part 13 is optical axis.
In order to guarantee good self-locking property, the helical angle of described screw thread 14 is selected 30 °.
One end of described fixed part 12 is fixedly connected with the lower surface of head 11, and the other end of fixed part 12 is connected with one end of guide part 13, and the other end of guide part 13 is provided with chamfering 15, and the angle of described chamfering 15 is 45 °.
The length of described fixed part 12 is 2/3 of whole nail shaft length, and the length of described guide part 13 is 1/3 of whole nail shaft length, and the diameter of described guide part 13 equates with the internal diameter of screw thread 14.
Described head 11 is provided with head recess 16, in the present embodiment, head recess 16 is interior hexagonal groove, the periphery of head recess 16 is provided with dovetail groove 17, in cargo handling process, head recess 16 is destroyed, cause guider screw to pick and place difficulty, in described head recess 16, be removably connected with neck bush 2, described neck bush 2 adopts the material that has elasticity and human body is had no adverse reaction to make, as shown in Figure 2, described neck bush 2 comprises neck bush body 21, the periphery of neck bush body 21 is provided with projection 22, described protruding 22 match with the dovetail groove 17 of head recess 16 peripheries.
During use, neck bush 2 is placed in head recess 16, projection 22 on neck bush 2 is placed in dovetail groove 17, for secure liner cover 2, guide part 13 is without screw thread, and there is chamfering 15, be convenient to insert in the rivet nut of intramedullary pin or dynamic hip screw (DHS), screw thread 14 on fixed part 12 is meshed with the female thread of intramedullary pin or dynamic hip screw (DHS), and there is self-locking property, adopt guider screw described in the utility model can insert relatively easily in rivet nut under the effect of guide part 12, simultaneously due to its guide effect, can be easier to adjust screw orientation and then make fixed part and corresponding site engagement, thereby effectively avoided toner screw and inserted difficulty, shortened operating time.
The above is giving an example of this utility model preferred forms, and the part of wherein not addressing is in detail those of ordinary skills' common practise.Protection domain of the present utility model is as the criterion with the content of claim, and any equivalent transformation carrying out based on technology enlightenment of the present utility model, also within protection domain of the present utility model.
Claims (8)
1. an orthopaedics guider screw, comprises screw body (1), and screw body (1) comprises head (11), it is characterized in that: described head (11) bottom is provided with smooth guide part (13);
Between described guide part (13) and head (11), be provided with fixed part (12);
The periphery of described fixed part (12) is provided with screw thread (14);
The diameter of described guide part (13) is less than the major diameter of thread of fixed part (12).
2. a kind of orthopaedics guider screw as claimed in claim 1, is characterized in that: the helical angle of described screw thread (14) is 30 °.
3. a kind of orthopaedics guider screw as claimed in claim 1, is characterized in that: the diameter of described guide part (13) equates with the internal diameter of screw thread (14).
4. a kind of orthopaedics guider screw as claimed in claim 1, is characterized in that: the length of described fixed part (12) is the twice of the length of guide part (13).
5. a kind of orthopaedics guider screw as claimed in claim 1, is characterized in that: the lower end of described guide part (13) is provided with chamfering (15).
6. a kind of orthopaedics guider screw as claimed in claim 1, is characterized in that: described head (11) is provided with the head recess (16) of interior hexangle type;
The periphery of described head recess (16) is provided with dovetail groove (17).
7. a kind of orthopaedics guider screw as claimed in claim 6, is characterized in that: in described head recess (16), be removably connected with neck bush (2).
8. a kind of orthopaedics guider screw as claimed in claim 7, is characterized in that: the periphery of described neck bush (2) is provided with projection (22);
Described projection (22) matches with dovetail groove (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041613.5U CN203710118U (en) | 2014-01-23 | 2014-01-23 | Guiding screw for orthopaedics department |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041613.5U CN203710118U (en) | 2014-01-23 | 2014-01-23 | Guiding screw for orthopaedics department |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203710118U true CN203710118U (en) | 2014-07-16 |
Family
ID=51149325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420041613.5U Expired - Fee Related CN203710118U (en) | 2014-01-23 | 2014-01-23 | Guiding screw for orthopaedics department |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203710118U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173095A (en) * | 2014-09-15 | 2014-12-03 | 广东泓志生物科技有限公司 | Interference screw for department of orthopaedics |
| CN105342679A (en) * | 2015-12-15 | 2016-02-24 | 徐强 | Single bone screw |
-
2014
- 2014-01-23 CN CN201420041613.5U patent/CN203710118U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173095A (en) * | 2014-09-15 | 2014-12-03 | 广东泓志生物科技有限公司 | Interference screw for department of orthopaedics |
| CN104173095B (en) * | 2014-09-15 | 2016-05-04 | 广东泓志生物科技有限公司 | A kind of orthopaedics extrusion screw |
| CN105342679A (en) * | 2015-12-15 | 2016-02-24 | 徐强 | Single bone screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20200123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |