CN207323532U - A kind of Combined type screw of automatic distraction reduction sclerite - Google Patents
A kind of Combined type screw of automatic distraction reduction sclerite Download PDFInfo
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- CN207323532U CN207323532U CN201720336902.1U CN201720336902U CN207323532U CN 207323532 U CN207323532 U CN 207323532U CN 201720336902 U CN201720336902 U CN 201720336902U CN 207323532 U CN207323532 U CN 207323532U
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Abstract
The utility model proposes a kind of Combined type screw of automatic distraction reduction sclerite, including inner screw, the screw sleeve for being connected to fractured near end block and being sleeved on inner screw, the adjustment part that is connected with inner screw；Inner screw includes optical axis section and outside diameter is more than the first threaded connection section of the optical axis section, its first threaded connection section is stretched into and is threaded in distal bone folded block；Screw sleeve includes hollow sleeve pipeline section and the second threaded connection section, and the hollow sleeve pipeline section of its towards distal bone folded block side is sleeved on the outside of the optical axis section of inner screw, and its second threaded connection section is threaded on fractured near end block.The utility model is simple in structure, design is reasonable, it is possible to achieve two sclerites are strutted and freely adjusted, for different needs, can targetedly it be operated, it is very convenient, favourable patients ' recovery, and, tail cap structure and the screw sleeve of setting fit closely, Bone Ingrowth is avoided, knockout screw is more convenient, reduces the pain of patient.
Description
Technical field
The field of medical instrument technology is the utility model is related to, more particularly, to a kind of combination of automatic distraction reduction sclerite
Formula screw.
Background technology
After the fracture of human body a part such as calcaneum, condyle of femur, condyle of humerus etc., often there is fracture compression and change, sclerite
Between mutually extruding after distance diminish, in surgical procedure, it is often necessary to using instrument distraction reduction, by fracture site pressure
Contracting is partially separated, and it is recovered normal physiology dissection contraposition.In current interior fixed solution, the fixed form of conventional bolt
Belong to pressurization to fix, for carrying out pressurization fixation between two sclerite sections, promote the distance between sclerite to diminish, it is existing
There is the screw fixation method of technology, can not realize that distance increases between sclerite, it is even more impossible to for different needs, to sclerite
The distance between carry out the accurate adjustment of distance to a declared goal, there is an urgent need for make improvements.
The content of the invention
The utility model is intended to overcome above-mentioned the defects of depositing in the prior art, proposes a kind of automatic distraction reduction sclerite
Combined type screw.
What the technical solution of the utility model was realized in：
A kind of Combined type screw of automatic distraction reduction sclerite, including it is connected into fracture of distal through fractured near end block screw thread
The inner screw of block, the screw sleeve for being connected to fractured near end block and being sleeved on inner screw, the adjustment part being connected with inner screw；It is described
Inner screw includes optical axis section and outside diameter is more than the first threaded connection section of the optical axis section, its first threaded connection section stretches into and screw thread
It is connected in distal bone folded block；The screw sleeve includes hollow sleeve pipeline section and the second threaded connection section, it is towards distal bone folded block
The hollow sleeve pipeline section of side is sleeved on the outside of the optical axis section of the inner screw, and its second threaded connection section is threaded in near-end
On sclerite；The adjustment part includes tail cap and the 3rd threaded joints, and tail cap medial surface props up screw sleeve away from fracture of distal
The end face of block side, the 3rd threaded connection section stretch into and are threaded in one end of the proximally facing sclerite of inner screw；The light
One side end face of the proximally facing sclerite of shaft part and being all provided with different from towards a side end face of distal bone folded block for the screw sleeve
There is the interior hexagonal hollow；The optical axis section is equipped with the 4th threaded joints being connected with the 3rd threaded joints of adjustment part.
Further, the outside diameter of the hollow sleeve pipeline section is less than the outside diameter of first threaded connection section, in first spiral shell
Line linkage section is equipped with blocking surface towards one end of the hollow sleeve pipeline section, plane where the blocking surface and the inner screw axis side
To vertical.
Further, the outside diameter of second threaded connection section is more than the outside diameter of the hollow sleeve pipeline section.
Further, the outside diameter of second threaded connection section is equal to the outside diameter of the first threaded connection section.
Further, the end face outside of the adjustment part is equipped with Hexagon hole.
Further, it is slidably matched between the hollow sleeve pipeline section and the optical axis section.
Further, there is gap between the hollow sleeve pipeline section inner wall and the optical axis section outer wall.
Further, the tail cap medial surface is equipped with taper thread, there is steel plate on the outside of screw sleeve, set on the steel plate with tail cap
The matched lock hole of taper thread, steel plate medial surface prop up the screw sleeve end face.
Above-mentioned technical proposal is employed, the beneficial effects of the utility model are：
The utility model is simple in structure, and design is reasonable, it is possible to achieve two sclerites are strutted and freely adjusted, for different
Need, can targetedly be operated, very convenient, favourable patients ' recovery, also, the tail cap structure set is locked with screw rod
Closely connected conjunction, avoids Bone Ingrowth, and knockout screw is more convenient, reduces the pain of patient.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the structure diagram of inner screw in the utility model；
Fig. 3 is the structure diagram of screw sleeve in the utility model；
Fig. 4 is the structure diagram of the adjustment part without helicitic texture in the utility model；
Fig. 5 is the structure diagram for the adjustment part that structure is threaded in the utility model；
Fig. 6 is the structure diagram of the utility model light plate.
Wherein：1- fractured near end blocks；2- distal bone folded blocks；3- inner screws；4- screw sleeves；5- adjustment parts；6- optical axis sections；7-
First threaded connection section；8- hollow sleeve pipeline sections；The second threaded connection sections of 9-；10- tail caps；The 3rd threaded connection sections of 11-；12- hinders
Block face；13- lock holes；14- steel plates；The 4th threaded joints of 15-；Hexagonal is hollow in 16- first；Hexagonal is hollow in 17- second；
Hexagonal is hollow in 18- the 3rd.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without creative efforts
All other embodiments obtained, shall fall within the protection scope of the present invention.
A kind of Combined type screw of automatic distraction reduction sclerite, as shown in Figures 1 to 6, including through fractured near end block 1 and
Screw thread be connected into the inner screw 3 of distal bone folded block 2, the screw sleeve 4 for being connected to fractured near end block 1 and being sleeved on inner screw 3, with it is interior
The adjustment part 5 that screw rod 3 connects；The inner screw 3 includes optical axis section 6 and outside diameter is more than the first threaded connection section of the optical axis section 6
7, its first threaded connection section 7 is stretched into and is threaded in distal bone folded block 2；The screw sleeve 4 includes 8 He of hollow sleeve pipeline section
Second threaded connection section 9, the hollow sleeve pipeline section 8 of its towards 2 side of distal bone folded block are sleeved on the optical axis section 3 of the inner screw 3
Outside, and its second threaded connection section 9 is threaded on fractured near end block 1；The adjustment part 5 includes 10 and the 3rd spiral shell of tail cap
Line connecting portion 11,10 medial surface of tail cap prop up end face of the screw sleeve 4 away from 2 side of distal bone folded block, the 3rd threaded connection section 11
Stretch into and be threaded in one end of the proximally facing sclerite 1 of inner screw 3.；The optical axis section is equipped with and the adjustment part the
4th threaded joints of three threaded joints connection, the 4th threaded joints have internal thread structure, connect with the 3rd screw thread
The external screw thread matching of socket part.Tail cap 10 is equipped with hexagonal hollow 18 in the 3rd.
One side end face of the proximally facing sclerite of optical axis section is equipped with hexagonal hollow 16 in first, for pushing inner screw
Into in the bone hole for accomplishing fluently screw thread；The screw sleeve is equipped with second in hexagonal different from towards a side end face of distal bone folded block
Sky 17, fractured near end block is rotated into for pushing screw sleeve.
It is pointed out that being coaxially provided with through hole on inner screw, screw sleeve and adjustment part three, human body group can be facilitated
Liquid stream is knitted to lead to, and cleaning-sterilizing during operation.
When screw sleeve screws in, the screw thread of screw sleeve enters along inner screw into fashionable cutting groove, and far and near bone piece is not
It can move, will not rotate or loosen without friction, inner screw between interior, screw sleeve.
The outside diameter of above-mentioned hollow sleeve pipeline section 8 is less than the outside diameter of first threaded connection section 7, is threadedly coupled described first
Section 9 is equipped with blocking surface 12 towards one end of the hollow sleeve pipeline section 8, the 12 place plane of blocking surface and 3 axis of inner screw
Direction is vertical.
The outside diameter of above-mentioned second threaded connection section 9 is more than the outside diameter of the hollow sleeve pipeline section.Above-mentioned second threaded connection section 9
Outside diameter be equal to first threaded connection section 7 outside diameter.
The end face outside of above-mentioned adjustment part 5 is equipped with hexagonal hollow 18 in the 3rd.It is convenient using the instruments such as allen wrench into
Row torquing operations.
In an optional embodiment, screw sleeve shape is machined with the light coordinated with inner screw like multilayer boss, inside
Slide opening, and a diameter of 5mm；The lower end outside diameter of screw sleeve is 8mm；Upper end is machined with the screw thread coordinated with fractured near end block, screw thread
Length is 20mm, a diameter of 9mm；Upper surface is machined with the interior hexagonal that inscribed circle diameter is 7mm.Above-mentioned hollow sleeve pipeline section 8 and institute
State and be slidably matched between optical axis section.Alternatively, there is gap between above-mentioned 8 inner wall of hollow sleeve pipeline section and 3 outer wall of optical axis section.
Tail cap is threadedly coupled with inner screw, is inserted finally, is closed the trailing space of this screw assemblies, is prevented Bone Ingrowth.
Above-mentioned 10 medial surface of tail cap is equipped with taper thread, there is steel plate 14 on the outside of screw sleeve, is set on the steel plate 14 and taper thread in tail cap
The lock hole 13 matched somebody with somebody, steel plate medial surface prop up the screw sleeve end face.With being fixed with locking bone fracture plate, locking synthetism can be passed through
The locking screw thread hole of plate, partial screw threads match each other after interlocking, then are connected with the inner screw of the screw assemblies of the present invention, realize lock
Determine the fixed form of bone plate-strut screw-bone.
In addition, tail cap outer rim also uses smooth structure, similar most common plain screw afterbody usually.Tail cap is passed through
Near-end bone piece is tightened with inner screw, you can realize combination the fixed form for strutting screw-bone.Conventional pressurized synthetism can also be passed through
After the circular hole of plate, then it is connected with the inner screw of screw assemblies of the present invention, realizes the fixation of pressurized bone plate-strut screw-bone
Mode.
After the run-out(of thread) of inner screw is withstood in the front end of screw sleeve, continue rotary screw set.Due to front inner screw
Barrier effect, screw sleeve start rotation in situ, and fractured near end block is due to the rotation of the screw thread of screw sleeve, it will to screw afterbody
Direction is moved, and opposite proximal end sclerite gradually appears separation.When separated distance reaches the result needed, stop screw sleeve
Rotation, realizes the separation between sclerite, and maintain this separated distance.
The utility model is simple in structure, and design is reasonable, it is possible to achieve two sclerites are strutted and freely adjusted, for different
Need, can targetedly be operated, very convenient, favourable patients ' recovery, also, the tail cap structure set is locked with screw rod
Closely connected conjunction, avoids Bone Ingrowth, and knockout screw is more convenient, reduces the pain of patient.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on, should be included in the utility model
Protection domain within.
Claims (8)
- A kind of 1. Combined type screw of automatic distraction reduction sclerite, it is characterised in that：Including connecting through fractured near end block screw thread The screw sleeve that enter the inner screw of distal bone folded block, is connected to fractured near end block and is sleeved on inner screw, be connected with inner screw Adjustment part；The inner screw includes optical axis section and outside diameter is more than the first threaded connection section of the optical axis section, its first threaded connection Section is stretched into and is threaded in distal bone folded block；The screw sleeve includes hollow sleeve pipeline section and the second threaded connection section, its court Hollow sleeve pipeline section to distal bone folded block side is sleeved on the outside of the optical axis section of the inner screw, and its second threaded connection section spiral shell Line is connected on fractured near end block；The adjustment part includes tail cap and the 3rd threaded joints, and tail cap medial surface props up screw sleeve End face away from distal bone folded block side, the 3rd threaded connection section stretch into and are threaded in the proximally facing sclerite of inner screw One end；One side end face of the proximally facing sclerite of optical axis section and the screw sleeve different from towards distal bone folded block It is hollow that one side end face is equipped with interior hexagonal；The optical axis section is equipped with the 4th be connected with the 3rd threaded joints of adjustment part Threaded joints.
- A kind of 2. Combined type screw of automatic distraction reduction sclerite according to claim 1, it is characterised in that：The sky The outside diameter of heart casing section is less than the outside diameter of first threaded connection section, in first threaded connection section towards the hollow sleeve One end of pipeline section is equipped with blocking surface, and plane where the blocking surface is vertical with the inner screw axis direction.
- A kind of 3. Combined type screw of automatic distraction reduction sclerite according to claim 1 or 2, it is characterised in that：Institute The outside diameter for stating the second threaded connection section is more than the outside diameter of the hollow sleeve pipeline section.
- A kind of 4. Combined type screw of automatic distraction reduction sclerite according to claim 1 or 2, it is characterised in that：Institute The outside diameter for stating the second threaded connection section is equal to the outside diameter of first threaded connection section.
- A kind of 5. Combined type screw of automatic distraction reduction sclerite according to claim 1, it is characterised in that：The tune The end face outside of one integral piece is equipped with Hexagon hole.
- A kind of 6. Combined type screw of automatic distraction reduction sclerite according to claim 1, it is characterised in that：The sky It is slidably matched between heart casing section and the optical axis section.
- A kind of 7. Combined type screw of automatic distraction reduction sclerite according to claim 1, it is characterised in that：The sky There is gap between heart casing section inner wall and the optical axis section outer wall.
- A kind of 8. Combined type screw of automatic distraction reduction sclerite according to claim 1, it is characterised in that：The tail Cap medial surface is equipped with taper thread, there is steel plate on the outside of screw sleeve, is set on the steel plate and the matched lock hole of taper thread in tail cap, steel Plate medial surface props up the screw sleeve end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720336902.1U CN207323532U (en) | 2017-03-21 | 2017-03-21 | A kind of Combined type screw of automatic distraction reduction sclerite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720336902.1U CN207323532U (en) | 2017-03-21 | 2017-03-21 | A kind of Combined type screw of automatic distraction reduction sclerite |
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| Publication Number | Publication Date |
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| CN207323532U true CN207323532U (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720336902.1U Active CN207323532U (en) | 2017-03-21 | 2017-03-21 | A kind of Combined type screw of automatic distraction reduction sclerite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106963469A (en) * | 2017-03-21 | 2017-07-21 | 姚忠宝 | A kind of Combined type screw of automatic distraction reduction sclerite |
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2017
- 2017-03-21 CN CN201720336902.1U patent/CN207323532U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106963469A (en) * | 2017-03-21 | 2017-07-21 | 姚忠宝 | A kind of Combined type screw of automatic distraction reduction sclerite |
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