CN102579124A - Self-locking fixed part for surgical implant - Google Patents
Self-locking fixed part for surgical implant Download PDFInfo
- Publication number
- CN102579124A CN102579124A CN2011100056997A CN201110005699A CN102579124A CN 102579124 A CN102579124 A CN 102579124A CN 2011100056997 A CN2011100056997 A CN 2011100056997A CN 201110005699 A CN201110005699 A CN 201110005699A CN 102579124 A CN102579124 A CN 102579124A
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- nail
- head
- self
- screw
- screw hole
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- 239000007943 implant Substances 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000003825 pressing Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000002513 implantation Methods 0.000 abstract 1
- 238000001356 surgical procedure Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- Dental Prosthetics (AREA)
Abstract
The invention relates to a self-locking fixed part for a surgical implant. The self-locking fixed part comprises a steel plate and a self-locking screw, wherein the self-locking screw consists of a screw rod and a screw cap, a ring-shaped groove with the end surface being similar to the V shape is arranged on the screw cap longitudinally, the screw cap is divided into an outer ring and an inner ring by the ring-shaped groove, more than two openings are arranged on the outer ring of the screw cap longitudinally, and the part with the maximum outer diameter of the screw cap is lower than the upper end surface of the screw cap; a screw hole matched with the shape of the screw cap is arranged on the steel plate, the inner diameter of an inlet of the screw hole is less than the maximum outer diameter of the of the screw cap, the maximum inner diameter of the screw hole is larger than the inner diameter of the inlet of the screw hole and less than the maximum outer diameter of the screw cap, and the inlet of the screw hole and an arc of the part with the maximum inner diameter are connected to form a laminated arc; and the self-locking screw penetrates through the screw hole arranged on the steel plate and is implanted into the steel plate for compressing and fixing the steel plate, and therefore, the part with the maximum outer diameter of the outer ring of the screw cap pushes against the laminated arc of the screw hole in a clamping way, so as to realize self locking. The self-locking fixed part has the advantages that the structure is simple, the cost is low, the processing and the production are easy, the implantation is convenient, the operation is fast, the incisura is small, and the surgery time is saved.
Description
Technical field
The present invention relates to a kind of fixture of surgical implant, specifically relate to a kind of self-locking fixture of surgical implant.
Background technology
Be out at present in the section operation, fracture is treated or in skeleton, during fixing surgical implants, adopted lock pad and pinning to fix the screw on the steel plate usually, prevent that screw from withdrawing to realize fixing.The structure that also has is in the steel plate screw hole, pack into turn or screwed packing, stops withdrawing from of screw.
The fixture of surgical implant as shown in Figure 1, by steel plate a, screw b, lock pad c and pinning d form.After operation light plate a is fixed, screw in screw b along the steel plate screw hole, a fixes with steel plate.In order to prevent that screw b from withdrawing from, adopt pinning d and the mode that lock pad c compresses screw b to fix screw b usually.Thereby actual that really be used for fixing steel plate a is screw b, but existing screw can only prevent that screw from withdrawing from from steel plate by being screwed in pinning, lock pad on the steel plate or turn, the screw thread packing that is contained in addition in steel plate screw the hole in, realizes fixing.Therefore the fixture parts are more, not only processed complex and complex operation.And parts whenever are installed in operation more, and will make the many steps of operation technique, operating time will prolong, and has also just increased a danger.Can find out also that by Fig. 1 lock pad c and pinning d need housing screw b in order to fix screw b simultaneously, pinning d is easy to exceed steel plate a, causes incisura than higher.
Summary of the invention
To the defective of prior art, the purpose of this invention is to provide a kind of simple in structure, swift to operate, the self-locking fixture of the surgical implant that cut channel is little.
For reaching above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of self-locking fixture of surgical implant is used for fixing surgical implant, and it comprises steel plate and Self-locking screw; Self-locking screw is made up of the screw rod and the head of a nail; Vertically offer the cannelure of the approximate V-arrangement of an end surface shape on the head of a nail; Cannelure is separated into outer ring and inner ring with the head of a nail, vertically offers the opening more than 2 on the outer ring of the head of a nail, and the height at the maximum outside diameter place of the head of a nail is lower than the upper surface of the head of a nail; Offer the screw hole that matches with head of a nail shape on the steel plate; Screw hole porch internal diameter is less than the maximum outside diameter of the head of a nail; The maximum inner diameter of screw hole is greater than the internal diameter of screwed hole porch, less than the maximum outside diameter of the head of a nail, and screw hole porch and maximum inner diameter place form a pressing circular arc; Steel plate is implanted and be fixed to the screw hole that Self-locking screw passes on the steel plate, and the maximum outside diameter place of head of a nail outer ring fastens in the pressing circular arc of screw hole and realizes self-locking at this moment.
The present invention also can further realize through following technical scheme:
The self-locking fixture of described surgical implant, wherein, the wide bottom, top of said head of a nail outer ring is narrow, arc transition between the upper and lower part.
The self-locking fixture of described surgical implant, wherein, the maximum outside diameter place height of the said head of a nail is lower than end face 0.2-0.4mm.
The self-locking fixture of described surgical implant; Wherein, the end face of said cannelure is the V-arrangement of asymmetric angle, and the angle of its inner ring inclined-plane and V-type summit vertical line is less than the angle of inclined-plane, outer ring and V-type summit vertical line; Width is 0.3-0.6mm, and the degree of depth is 1-1.5mm.
The self-locking fixture of described surgical implant, wherein, the opening on the said head of a nail outer ring is 2-8,5 °-10 ° of opening angles, A/F is 0.3-1mm, and opening is divided into a plurality of covering of the fans with head of a nail outer ring, and when receiving external force, covering of the fan shrinks to head of a nail inner ring.
The self-locking fixture of described surgical implant, wherein, said screw hole porch internal diameter is than the little 0.1-0.3mm of screw head of a nail maximum outside diameter.
The self-locking fixture of described surgical implant, wherein, said screw hole maximum inner diameter place is apart from the screw hole 0.1-0.2mm that enters the mouth, than the little 0.05-0.2mm of screw head of a nail maximum outside diameter.
The self-locking fixture of described surgical implant, wherein, said screw head of a nail inner ring is offered interior six sides, and minimum wall thickness (MINI W.) is more than or equal to 0.5mm between interior six sides and cannelure.
The self-locking fixture of described surgical implant, wherein, the maximum height of the said screw head of a nail is less than or equal to the thickness of steel plate.
Owing to adopted technique scheme, made the present invention possess following technique effect:
1, the self-locking fixture of surgical implant of the present invention is made up of steel plate and Self-locking screw, need not to add lock pad and pinning and can realize fixing.Simple in structure, parts are few, and are easy to operate; Only need during use screw is screwed in, the screw head of a nail receives the pressure of steel plate inlet, and cannelure on the head of a nail and open design are shunk in the entering screw hole its pressurized; Get into the compressed covering of the fan in back outwards open with steel plate on tightly blocked by the pressing circular arc, thereby compressing the effect that has reached self-locking on the basis of steel plate, it is convenient to implant; Simple and quick, save operating time;
2, the self-locking fixture of surgical implant of the present invention, parts are few, and are simple in structure, and production and processing very easily realizes, has practiced thrift the production and processing cost;
3, the self-locking fixture of surgical implant of the present invention uses the back head of a nail to get into fully in the screw hole, and incisura is little.
Description of drawings
Fig. 1 is the structural representation of existing surgical implant fixture;
Fig. 2 is the structural representation of the self-locking fixture of surgical implant of the present invention;
Fig. 3 is the A portion structure enlarged diagram of Fig. 2;
Fig. 4 is the plan structure sketch map of the Self-locking screw head of a nail.
The specific embodiment
Combine accompanying drawing 2-4 to specify the present invention below in detail.
A kind of self-locking fixture of surgical implant comprises steel plate 1 and Self-locking screw 2; Self-locking screw 2 is made up of the screw rod 21 and the head of a nail 22; Vertically offer the cannelure 3 of the approximate V-type of an end surface shape on the head of a nail 22; Cannelure 3 is separated into outer ring 4 and inner ring 5 with the head of a nail; Vertically offer the opening 6 more than 2 on the outer ring 4 of the head of a nail 22, the height at the maximum outside diameter place of the head of a nail 22 is lower than the upper surface of the head of a nail 22; Offer the screw hole 11 that matches with the head of a nail 22 shapes on the steel plate 1; Screw hole 11 porch internal diameters are less than the maximum outside diameter of the head of a nail 22; The maximum inner diameter of screw hole 11 is greater than the internal diameter of screwed hole 11 porch, less than the maximum outside diameter of the head of a nail 22, and screw hole 11 porch and maximum inner diameter place form a pressing circular arc 12; Steel plate 1 is implanted and be fixed to the screw hole 11 that Self-locking screw 2 passes on the steel plate 1, and the maximum outside diameter place of head of a nail outer ring 4 fastens and in the pressing circular arc 12 of screw hole 11, realizes self-locking at this moment.
Wherein, wide bottom, the top of head of a nail outer ring 4 is narrow, arc transition between the upper and lower part so that the head of a nail 22 get into more smoothly in the screw hole 11.
Preferable, the height of the aspect ratio head of a nail 22 end faces at the maximum outside diameter place of the head of a nail 22 hangs down 0.2-0.4mm, to guarantee that when engaging the head of a nail 22 gets in the screw hole 11 fully, realizes minimum incisura.
Why realize better lock with and guarantee that the head of a nail 22 receives the shrink space of external force; It is fixed that the big I of cannelure 3 and opening 6 is come according to the size of the head of a nail; The cannelure end face of best cannelure 3 is the V-type of asymmetric angle; The angle of inner ring inclined-plane and V-type summit vertical line is less than the angle of inclined-plane, outer ring and V-type summit vertical line, and width is 0.3-0.6mm, and the degree of depth is 1-1.5mm.And opening 6 the bests are provided with 2-8, and width the best is 0.3-1mm, 5 °-10 ° of opening angles.Opening 6 is divided into a plurality of covering of the fans with head of a nail outer ring 4, and when receiving external force, covering of the fan shrinks to head of a nail inner ring 5.
The self-locking fixture of described surgical implant, wherein, said screw hole porch internal diameter is than the little 0.1-0.3mm of screw head of a nail maximum outside diameter.
For locking more easily, in screw head of a nail inner ring, to offer interior six sides, 7 screws and be set to hexagon socket head cap screw, interior hexagonal need be born bigger power when considering locking, so interior six sides 7 and 3 minimum wall thickness (MINI W.)s of cannelure should be more than or equal to 0.5mm.
For the lock of realizing screw hole 11 and the screw head of a nail 22 and, the maximum inner diameter place of screw hole 11 apart from the screw hole 0.1-0.2mm that enters the mouth, the maximum inner diameter of screw hole is than the little 0.05-0.2mm of maximum outside diameter of the screw head of a nail 22.
For reaching minimum incisura, the maximum height of the screw head of a nail 22 should be less than or equal to the thickness of steel plate 1.
The above is merely preferred embodiment of the present invention, is not the present invention is done any pro forma qualification.Any change that is equal to, modification or differentiation etc. that all those skilled in the art utilize technical scheme of the present invention that the foregoing description is made all still belong in the scope of technical scheme of the present invention.
Claims (9)
1. the self-locking fixture of a surgical implant is used for fixing surgical implant, it is characterized in that:
Comprise steel plate and Self-locking screw;
Self-locking screw is made up of the screw rod and the head of a nail; Vertically offer the cannelure of the approximate V-arrangement of an end surface shape on the head of a nail; Cannelure is separated into outer ring and inner ring with the head of a nail, vertically offers the opening more than 2 on the outer ring of the head of a nail, and the height at the maximum outside diameter place of the head of a nail is lower than the upper surface of the head of a nail;
Offer the screw hole that matches with head of a nail shape on the steel plate; Screw hole porch internal diameter is less than the maximum outside diameter of the head of a nail; The maximum inner diameter of screw hole is greater than the internal diameter of screwed hole porch, less than the maximum outside diameter of the head of a nail, and screw hole porch and maximum inner diameter place form a pressing circular arc;
Steel plate is implanted and be fixed to the screw hole that Self-locking screw passes on the steel plate, and the maximum outside diameter place of head of a nail outer ring fastens in the pressing circular arc of screw hole and realizes self-locking at this moment.
2. the self-locking fixture of surgical implant according to claim 1 is characterized in that:
The wide bottom, top of said head of a nail outer ring is narrow, arc transition between the upper and lower part.
3. the self-locking fixture of surgical implant according to claim 1 is characterized in that:
The maximum outside diameter place height of the said head of a nail is lower than end face 0.2-0.4mm.
4. the self-locking fixture of surgical implant according to claim 1 is characterized in that:
The end face of said cannelure is the V-arrangement of asymmetric angle, and the angle of its inner ring inclined-plane and V-type summit vertical line is less than the angle of inclined-plane, outer ring and V-type summit vertical line, and width is 0.3-0.6mm, and the degree of depth is 1-1.5mm.
5. the self-locking fixture of surgical implant according to claim 1 is characterized in that:
Opening on the said head of a nail outer ring is 2-8,5 °-10 ° of opening angles, and A/F is 0.3-1mm, and opening is divided into a plurality of covering of the fans with head of a nail outer ring, and when receiving external force, covering of the fan shrinks to head of a nail inner ring.
6. the self-locking fixture of surgical implant according to claim 1 is characterized in that:
Said screw hole porch internal diameter is than the little 0.1-0.3mm of screw head of a nail maximum outside diameter.
7. the self-locking fixture of surgical implant according to claim 6 is characterized in that:
Said screw hole maximum inner diameter place is apart from the screw hole 0.1-0.2mm that enters the mouth, and maximum inner diameter is than the little 0.05-0.2mm of screw head of a nail maximum outside diameter.
8. according to the self-locking fixture of arbitrary described surgical implant among the claim 1-7, it is characterized in that:
Said screw head of a nail inner ring is offered interior six sides, and minimum wall thickness (MINI W.) is more than or equal to 0.5mm between interior six sides and cannelure.
9. the self-locking fixture of surgical implant according to claim 8 is characterized in that:
The maximum height of the said screw head of a nail is less than or equal to the thickness of steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110005699.7A CN102579124B (en) | 2011-01-12 | 2011-01-12 | Self-locking fixed part for surgical implant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110005699.7A CN102579124B (en) | 2011-01-12 | 2011-01-12 | Self-locking fixed part for surgical implant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102579124A true CN102579124A (en) | 2012-07-18 |
| CN102579124B CN102579124B (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110005699.7A Active CN102579124B (en) | 2011-01-12 | 2011-01-12 | Self-locking fixed part for surgical implant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102579124B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142021A (en) * | 1995-06-28 | 1997-02-05 | 小糸制作所株式会社 | Self-locking nut |
| CN2555789Y (en) * | 2002-05-28 | 2003-06-18 | 黄淦堂 | Self-locking inserted fusion fixator of vertebra |
| CN2815291Y (en) * | 2005-08-31 | 2006-09-13 | 陈�光 | Universal self-locking internal-fixing stent |
| CN201492491U (en) * | 2009-08-05 | 2010-06-02 | 北京市富乐科技开发有限公司 | Self-locking return-prevention cervical vertebra screw-plate system |
-
2011
- 2011-01-12 CN CN201110005699.7A patent/CN102579124B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142021A (en) * | 1995-06-28 | 1997-02-05 | 小糸制作所株式会社 | Self-locking nut |
| CN2555789Y (en) * | 2002-05-28 | 2003-06-18 | 黄淦堂 | Self-locking inserted fusion fixator of vertebra |
| CN2815291Y (en) * | 2005-08-31 | 2006-09-13 | 陈�光 | Universal self-locking internal-fixing stent |
| CN201492491U (en) * | 2009-08-05 | 2010-06-02 | 北京市富乐科技开发有限公司 | Self-locking return-prevention cervical vertebra screw-plate system |
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| Publication number | Publication date |
|---|---|
| CN102579124B (en) | 2014-06-18 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Xiwang Inventor after: Zhai Zhiyong Inventor after: Shi Chunbao Inventor after: Zhang Jinsuo Inventor before: Shi Chunbao Inventor before: Zhang Jinsuo |