CN209032591U - Explosion-proof compressive hollow screw without a head - Google Patents
Explosion-proof compressive hollow screw without a head Download PDFInfo
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- CN209032591U CN209032591U CN201820886072.4U CN201820886072U CN209032591U CN 209032591 U CN209032591 U CN 209032591U CN 201820886072 U CN201820886072 U CN 201820886072U CN 209032591 U CN209032591 U CN 209032591U
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- screw
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- tail portion
- explosion
- proof
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Abstract
A kind of explosion-proof compressive hollow screw without a head, including screw head, screw bar portion, screw tail portion and screw core bore, screw core bore penetrate through screw head, screw bar portion and screw tail portion；The outer surface of screw head, screw bar portion and screw tail portion is equipped with screw thread, and the screw pitch of above-mentioned screw thread is reduced by screw head to screw tail portion, self tapping slot is arranged in screw head, screw tail portion is equipped with Hexagon hole or interior hexagonal flower-shape hole, and multiple pressure-relief explosion-proof slots are arranged on the screw thread of screw trailing exterior surface.The utility model constantly pressurizes during screw screws in, to obtain better pressure effect；Self tapping slot is arranged in screw head, with self tapping slot instead of nail tip, reduce the stimulation to soft tissue, and the self tapping that can be realized screw bores certainly, on the one hand screw tail portion setting pressure-relief explosion-proof slot can be such that screw screw-in is more easier, on the other hand the bone explosion during screwing in is also avoided, easy surgical procedure is conducive to patient's post-operative recovery.
Description
Technical field
The utility model relates to the technical field of orthopedic medical device, specifically a kind of explosion-proof hollow compression spiral shell without a head
Nail.
Background technique
Fracture is one of most common damage, and as aging of population is more serious, fracture Annual occurence rate is gradually risen, outside
Section's operation is relatively effective therapeutic scheme, with the continuous proposition that new operation is theoretical, it was recognized that soft group around fracture
The degree of injury and guarantee bone tissue knitted obtain good blood supply no less important, and compressive hollow screw without a head is a kind of reduction
To the good solution of soft tissue irritation.
Compressive hollow screw without a head in the prior art, including screw head, screw bar portion, screw tail portion and screw core
Hole, external in screw are arranged uniform continuous thread, and screw head is arranged nail tip, by Special drill tool in bone group when use
Drilling is knitted, then is screwed in by nail tip guidance screw, but the compressive hollow screw without a head of the prior art can not play effective pressurization, and
And it is easy the soft tissue around stimulation bone, it is difficult when screw screws in, and there are screw tail portions to screw in caused by diameter becomes larger
The risk of bone explosion.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of explosion-proof compressive hollow screws without a head.
The utility model is adopted the technical scheme that solve technical problem present in well-known technique:
The explosion-proof compressive hollow screw without a head of the utility model, including screw head, screw bar portion, screw tail portion and screw
Core bore, screw core bore penetrate through screw head, screw bar portion and screw tail portion；Screw head, screw bar portion and screw tail portion it is outer
Surface is equipped with screw thread, and the screw pitch of above-mentioned screw thread is reduced by screw head to screw tail portion, and self tapping slot, screw is arranged in screw head
Tail portion is equipped with Hexagon hole or interior hexagonal flower-shape hole, and multiple pressure-relief explosion-proof slots are arranged on the screw thread of screw trailing exterior surface.
The utility model can also use following technical measures:
The screw pitch of the screw thread is gradually continuously reduced by screw head, screw bar portion to screw tail portion.
Six pressure-relief explosion-proof slots are uniformly arranged on the screw thread of the screw trailing exterior surface.
The utility model has the advantages and positive effects of:
In the explosion-proof compressive hollow screw without a head of the utility model, the thread pitch of screw head to tail portion is gradually reduced,
It constantly pressurizes during screw screws in, to obtain better pressure effect；Self tapping slot is arranged in screw head, with self tapping
Slot reduces the stimulation to soft tissue instead of nail tip, and can be realized the self tapping of screw from boring, without other brills when use
On the one hand hole tool, screw tail portion setting pressure-relief explosion-proof slot can be such that screw screw-in is more easier, on the other hand also avoid revolving
Bone explosion during entering, easy surgical procedure, is conducive to patient's post-operative recovery.
Detailed description of the invention
Fig. 1 is the main view of the explosion-proof compressive hollow screw without a head of the utility model；
Fig. 2 is the left view of the explosion-proof compressive hollow screw without a head of the utility model.
Fig. 3 is the right view of the explosion-proof compressive hollow screw without a head of the utility model.
Specific embodiment
The technical solution of the utility model is described in detail below by way of the drawings and specific embodiments.
As shown in Figure 1 to Figure 3, the explosion-proof compressive hollow screw without a head of the utility model, including screw head 1, shank of screw
Portion 2, screw tail portion 3 and screw core bore 7, screw core bore penetrates through screw head, screw bar portion and screw tail portion, to make across spiral shell
The guide pin of line core bore registration during surgery；The outer surface of screw head, screw bar portion and screw tail portion is equipped with screw thread 4, and
The screw pitch of above-mentioned screw thread is reduced by screw head to screw tail portion, i.e., the screw pitch of screw head is maximum, in screw in use, screw
The biggish screw pitch in head is more conducive to the screw-in of screw, and the lesser screw pitch in screw tail portion is then more advantageous to and screw and bone group
The pressurization knitted is fixed；Self tapping slot 5 is set in screw head, the self tapping of screw may be implemented from boring, the screw of small dimension screws in not
Other boring bar tools are needed again, and the screw of larger specification is implanted into again after bit bore can be used, but is even bored using drill bit
The case where hole, band by self tapping slot screw head it is the same can make screw screw-in be more easier, screw can be entirely buried in bone,
It will not have a negative impact to the activity in joint, and reduce the effect stimulated bone peripheral soft tissues；Screw tail portion is equipped with interior six
Corner apertures 8 or interior hexagonal flower-shape hole, hexagon ring or hexagonal flower-shape hole equally can be realized identical effect, instrument can be cooperated spiral shell
Nail is implanted in bone, and specific shape can be selected according to the actual situation；It is arranged on the screw thread of screw trailing exterior surface
Multiple pressure-relief explosion-proof slots 6, so as under the premise of not reducing screw axial biasing strength as far as possible, reduce screw it is radial with
The intensity of pressure between bone tissue makes screw be more easier to screw in, while also avoiding bone explosion bring damage.
The screw pitch of screw thread is gradually continuously reduced by screw head, screw bar portion to screw tail portion, thus make screw-in process and
Pressure process uniformly carries out, and uses more smooth.
It is uniformly arranged six pressure-relief explosion-proof slots on the screw thread of screw trailing exterior surface, the setting position of pressure-relief explosion-proof slot can be with
It is corresponding with the set-up mode of the Hexagon hole of screw tail portion or interior hexagonal flower-shape hole.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation, it is any however, be not intended to limit the utility model although the utility model has been described by way of example and in terms of the preferred embodiments
Those skilled in the art are not departing within the scope of technical solutions of the utility model, certainly can be using in the technology disclosed
Appearance makes a little change or modification, becomes the equivalent embodiment of equivalent variations, but all without departing from technical solutions of the utility model
Content, any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention,
It is all within the scope of the technical scheme of the utility model.
Claims (3)
1. a kind of explosion-proof compressive hollow screw without a head, including screw head, screw bar portion, screw tail portion and screw core bore, screw
Core bore penetrates through screw head, screw bar portion and screw tail portion；It is characterized by: screw head, screw bar portion and screw tail portion
Outer surface is equipped with screw thread, and the screw pitch of above-mentioned screw thread is reduced by screw head to screw tail portion, and self tapping slot, spiral shell is arranged in screw head
It follows closely tail portion and is equipped with Hexagon hole or interior hexagonal flower-shape hole, and multiple pressure-relief explosion-proof slots are set on the screw thread of screw trailing exterior surface.
2. explosion-proof compressive hollow screw without a head according to claim 1, it is characterised in that: the screw pitch of screw thread is by head of screw
Portion, screw bar portion to screw tail portion are gradually continuously reduced.
3. explosion-proof compressive hollow screw without a head according to claim 1 or 2, it is characterised in that: screw trailing exterior surface
Six pressure-relief explosion-proof slots are uniformly arranged on screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820886072.4U CN209032591U (en) | 2018-06-08 | 2018-06-08 | Explosion-proof compressive hollow screw without a head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820886072.4U CN209032591U (en) | 2018-06-08 | 2018-06-08 | Explosion-proof compressive hollow screw without a head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209032591U true CN209032591U (en) | 2019-06-28 |
Family
ID=67028793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820886072.4U Active CN209032591U (en) | 2018-06-08 | 2018-06-08 | Explosion-proof compressive hollow screw without a head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209032591U (en) |
-
2018
- 2018-06-08 CN CN201820886072.4U patent/CN209032591U/en active Active
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