CN103054643B - Broken nail extractor - Google Patents
Broken nail extractor Download PDFInfo
- Publication number
- CN103054643B CN103054643B CN201210570594.0A CN201210570594A CN103054643B CN 103054643 B CN103054643 B CN 103054643B CN 201210570594 A CN201210570594 A CN 201210570594A CN 103054643 B CN103054643 B CN 103054643B
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- CN
- China
- Prior art keywords
- broken nail
- taking out
- hollow
- trepan
- drill
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- 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.)
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- 241000425571 Trepanes Species 0.000 claims description 37
- 210000000988 bone and bone Anatomy 0.000 abstract description 11
- 238000005553 drilling Methods 0.000 abstract description 4
- 206010048886 Onychoclasis Diseases 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 206010061363 Skeletal injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
A broken nail extractor comprises a hollow trephine, a threaded needle and a connection rod. A plurality of end teeth are arranged at the ring end of the head portion of the hollow trephine, spiral teeth are arranged on the rear portions of the end teeth, trephine inner holes are arranged at the centers of the end teeth, and the outer rear portions of the end teeth are tapered, and drill type spiral grooves are arranged at the tapered rear end. Inner threads are arranged on the rear portion of the hollow trephine, the threaded needle is arranged in the hollow trephine, the front end of the threaded needle stretches out of the trephine inner holes, and the connection rod is arranged at the rear end of the threaded needle. The broken nail extractor has the advantages that an alpha tapered angle is arranged on the head portion, and no resistance exists when bones around a broken nail is drilled; the plurality of the end teeth are arranged on the head portion, so that the extractor is sharp during bone extracting; hollow trephines with different diameters are provided according to different sizes of broken nails; the rotation directions of the grooves on the head portion are leftward; and threads on the tail portion are left-hand threads, the screwing direction is in accordance with the drilling direction during matching usage with the threaded needle and the connection rod, and looseness of connection threads is prevented.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly a kind of rear a kind of device for taking out broken nail that broken nail taking-up after screw fractures occurs of in Orthopeadic Surgery internal fixation operation or performing the operation.
Background technology
In application hone lamella screw, be fixedly the method for common treatment fracture at present, but due to screw quality or other reason, in clinical use or after operation, there is sometimes the phenomenon that screw fractures, how successfully to take out the screw of fracture, not causing again the too much destruction of sclerotin, is the difficult problem that Orthopeadic Surgery doctor need to solve.
For many years, most hospitals adopt osteotome that broken nail bone is around removed, with nail-fetching device, grasp broken nail again and taken out, this broken nail device was once brought into play historical action, took out broken nail and treated a lot of patients, but along with the propelling of time and the progress of technology, find clinically first with osteotome, to get bone, then with broken nail device, broken nail is taken out and has following defect: 1) with osteotome, get bone, bone removes a lot, bone injury is larger, and 2) use inconvenience.The nail-fetching device that producer provides first must turn clockwise T-shaped handle will grasp head unclamp, grasped broken nail another mistake hour hands rotary handle broken nail firmly grasped, by its taking-up.Troublesome poeration, extends operating time.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, drill through sharp, wound is less, can take out fast a kind of device for taking out broken nail of broken nail.
For achieving the above object, the present invention takes following technical scheme:
A kind of device for taking out broken nail, it is characterized in that, it includes hollow trepan, screw needle, connecting rod, the head ring end of described hollow trepan is provided with a plurality of end teeth, the rear portion of this end tooth is provided with helical tooth, the center of this end tooth is provided with trepan endoporus, and the outer rear portion of this end tooth is taper, at tapered back end, is provided with drill-bit type spiral grooves; At hollow trepan rear portion, be provided with female thread, in hollow trepan, be provided with screw needle, this screw needle front end stretches out trepan endoporus, and this screw needle rear end is provided with connecting rod.
The hand of spiral of described drill-bit type spiral grooves is left-handed, and is provided with a plurality of drill-bit type spiral grooves.
The cone angle a of described taper is 16-25 °.
Described drill-bit type spiral grooves is provided with margin width f, and this margin width f is 0.3-0.5mm.
The helixangleβ of described drill-bit type spiral grooves is 23 °.
The female thread at described hollow trepan rear portion is left hand thread, and coordinating left-handed connecting rod and rear end, rear portion is left-handed screw needle, and it screws direction and to drill through direction consistent.
The middle part, rear end of described screw needle is provided with a word groove, and this connecting rod front end is provided with the word boss with a word groove fit, after the rear end one word groove of this screw needle coordinates with a word boss of connecting rod front end, screws in the left hand thread at hollow trepan rear portion.
The end sword degree of depth E of described end tooth is 0.6-1.8mm.
The tread B of described drill-bit type spiral grooves is 2-4mm.
The diameter D of described hollow trepan is 7.5-9mm.
The invention has the beneficial effects as follows:
1, head has α cone angle, non-resistance when drilling through bone around of broken nail.
2, head has a plurality of end teeth, and end sword degree of depth 0.6-1.8mm is sharper while drilling through bone.
3, different according to the specification of broken nail, and have the hollow trepan of different size diameter.
4, head groove rotation direction is left-handed, and according to the difference of cavity ring drill diameter, the quantity of groove is also different, and the depth B of groove is 2-4mm, and has f (ligament), sharply when drilling through bone is beneficial to again the bone that venting removes.
5, tailing screw flight is left hand thread, and while being used in conjunction with screw needle and connecting rod, it screws direction and to drill through direction consistent, avoids connecting thread to have the generation of loosening phenomenon.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is hollow trepan structural representation of the present invention.
Fig. 3 is connecting rod structural representation of the present invention.
Fig. 4 is screw needle structural representation of the present invention.
Fig. 5 is hollow trepan structure for amplifying schematic diagram of the present invention.
Fig. 6 be Fig. 5 A ?A section structure for amplifying schematic diagram.
Fig. 7 be Fig. 5 B ?B section structure for amplifying schematic diagram.
Drawing reference numeral:
1, hollow trepan; 11, trepan endoporus; 12, helical tooth; 13, female thread; 14, the rear end endoporus of hollow trepan; 15, end tooth; 16, drill-bit type spiral grooves; 2, connecting rod; 21, the front end of connecting rod; 22, a word boss; 23, connection handle; 3, screw needle; 31, screw needle follower head; 32, a word groove; 33, screw needle front end.
The specific embodiment:
Shown in Fig. 1-Fig. 7: a kind of device for taking out broken nail, it includes hollow trepan 1, screw needle 3, connecting rod 2, the head ring end of described hollow trepan 1 is provided with a plurality of end teeth 15, this example is provided with 5 end teeth 15, the rear portion of this end tooth 15 is provided with helical tooth 12, this end tooth 15 center is provided with trepan endoporus 11, and the outer rear portion of this end tooth 15 is taper, at tapered back end, is provided with drill-bit type spiral grooves 16; At hollow trepan 1 rear portion, be provided with female thread 13, in hollow trepan 1, be provided with screw needle 3, this screw needle front end 33 stretches out trepan endoporus 11, and these screw needle 3 rear ends are provided with connecting rod 2, and connecting rod 2 rear portions are connection handle 23.
This screw needle follower head 31 is arranged in the rear end endoporus 14 of hollow trepan and is connected with the female thread 13 at hollow trepan rear portion, and the front end 21 of this connecting rod is arranged on that the rear end endoporus 14 of hollow trepan is interior to be connected with the female thread 13 at hollow trepan rear portion.
The hand of spiral of described drill-bit type spiral grooves 16 is left-handed, and is provided with a plurality of drill-bit type spiral grooves 16.
The cone angle a of described taper is 16-25 °.
Described drill-bit type spiral grooves 16 is provided with margin width f, and this margin width f is 0.3-0.5mm.
The helixangleβ of described drill-bit type spiral grooves 16 is 23 °.
The female thread 13 at described hollow trepan rear portion is left hand thread, and coordinating left-handed connecting rod 2 and rear end, rear portion is left-handed screw needle 3, and it screws direction and to drill through direction consistent.
The middle part, rear end of described screw needle 3 is provided with a word groove 32, these connecting rod 2 front ends are provided with the word boss 22 coordinating with a word groove 32, after the rear end one word groove 32 of this screw needle 3 coordinates with a word boss 22 of connecting rod 2 front ends, screw in the left hand thread at hollow trepan 1 rear portion.
The end sword degree of depth E of described end tooth 15 is 0.6-1.8mm.
The tread B of described drill-bit type spiral grooves 16 is 2-4mm.
The diameter D of described hollow trepan is 7.5-9mm.
The present invention selects the device for taking out broken nail of different size according to the specification of broken nail in human body, when getting broken nail, after first a word groove fit of a word boss of connecting rod one end and screw needle one end is good, by core drill tailing screw flight place, screwed in, the other end of connecting rod connects fast connecting handle.Apply external force and be rotated counterclockwise handle, core drill drills through to broken nail direction, remove broken nail bone around until screw needle contact broken nail, first take out Novel cut nail extractor, and take out screw needle, and then again Novel cut nail extractor is assembled, continue boring, until broken nail exposes, enter core drill 10mm left and right, the core drill that turns clockwise takes out nail road broken nail.
Claims (10)
1. a device for taking out broken nail, it is characterized in that, it includes hollow trepan (1), screw needle (3), connecting rod (2), the head ring end of described hollow trepan is provided with a plurality of end teeth (15), the rear portion of this end tooth is provided with helical tooth (12), the center of this end tooth is provided with trepan endoporus (11), and the outer rear portion of this end tooth is taper, at tapered back end, is provided with drill-bit type spiral grooves (16); At hollow trepan rear portion, be provided with female thread (13), be provided with screw needle (3) in hollow trepan, this screw needle (3) front end stretches out trepan endoporus (11), and this screw needle (3) rear end is provided with connecting rod (2).
2. a kind of device for taking out broken nail according to claim 1, is characterized in that, the hand of spiral of described drill-bit type thread groove (16) is left-handed, and is provided with a plurality of drill-bit type spiral grooves.
3. a kind of device for taking out broken nail according to claim 1, is characterized in that, the cone angle a of described taper is 16-25 °.
4. a kind of device for taking out broken nail according to claim 1, is characterized in that, described drill-bit type spiral grooves (16) is provided with margin width f, and this margin width f is 0.3-0.5mm.
5. a kind of device for taking out broken nail according to claim 2, is characterized in that, the helixangleβ of described drill-bit type spiral grooves (16) is 23 °.
6. a kind of device for taking out broken nail according to claim 1, it is characterized in that, the female thread (13) at described hollow trepan rear portion is left hand thread, and coordinating left-handed connecting rod (2) and rear end, rear portion is left-handed screw needle (3), and it screws direction and to drill through direction consistent.
7. a kind of device for taking out broken nail according to claim 6, it is characterized in that, the middle part, rear end of described screw needle (3) is provided with a word groove (32), this connecting rod (2) front end is provided with the word boss (22) with a word groove fit, after the rear end one word groove of this screw needle coordinates with a word boss of connecting rod front end, screws in the left hand thread at hollow trepan rear portion.
8. a kind of device for taking out broken nail according to claim 1, is characterized in that, the end sword degree of depth E of described end tooth (15) is 0.6-1.8mm.
9. a kind of device for taking out broken nail according to claim 1, is characterized in that, the tread B of described drill-bit type spiral grooves (16) is 2-4mm.
10. a kind of device for taking out broken nail according to claim 1, is characterized in that, the diameter D of described hollow trepan (1) is 7.5-9mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210570594.0A CN103054643B (en) | 2012-12-25 | 2012-12-25 | Broken nail extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210570594.0A CN103054643B (en) | 2012-12-25 | 2012-12-25 | Broken nail extractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103054643A CN103054643A (en) | 2013-04-24 |
| CN103054643B true CN103054643B (en) | 2014-11-26 |
Family
ID=48097757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210570594.0A Active CN103054643B (en) | 2012-12-25 | 2012-12-25 | Broken nail extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103054643B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104546167A (en) * | 2015-01-15 | 2015-04-29 | 大连三生科技发展有限公司 | Tool and method for taking out broken central bolt of planted body |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4423721A (en) * | 1978-09-04 | 1984-01-03 | Schwarzkopf Development Corporation | Device for insertion and extraction of medullary nails |
| CN2626448Y (en) * | 2003-07-18 | 2004-07-21 | 王平 | Broken bolt extractor for orthopaedics |
| CN1935095A (en) * | 2005-09-19 | 2007-03-28 | 伊尼恩有限公司 | Device for removal of fastening means from human tissue |
| CN200963182Y (en) * | 2006-10-27 | 2007-10-24 | 翁习生 | Broken nail extraction apparatus |
| CN201353197Y (en) * | 2009-02-25 | 2009-12-02 | 崔刚成 | Novel residual bone nail extractor |
| CN101940497A (en) * | 2009-07-06 | 2011-01-12 | 洪潮 | Trepan broken-nail extractor |
| CN102232866A (en) * | 2010-05-07 | 2011-11-09 | 国华 | Device for taking out fixing screw in orthopaedics |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070123909A1 (en) * | 2005-10-27 | 2007-05-31 | Rupp Glenn A | Extractor For Broken Bone Screws |
| CN203042424U (en) * | 2012-12-25 | 2013-07-10 | 李书凡 | Extractor for broken nails |
-
2012
- 2012-12-25 CN CN201210570594.0A patent/CN103054643B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4423721A (en) * | 1978-09-04 | 1984-01-03 | Schwarzkopf Development Corporation | Device for insertion and extraction of medullary nails |
| CN2626448Y (en) * | 2003-07-18 | 2004-07-21 | 王平 | Broken bolt extractor for orthopaedics |
| CN1935095A (en) * | 2005-09-19 | 2007-03-28 | 伊尼恩有限公司 | Device for removal of fastening means from human tissue |
| CN200963182Y (en) * | 2006-10-27 | 2007-10-24 | 翁习生 | Broken nail extraction apparatus |
| CN201353197Y (en) * | 2009-02-25 | 2009-12-02 | 崔刚成 | Novel residual bone nail extractor |
| CN101940497A (en) * | 2009-07-06 | 2011-01-12 | 洪潮 | Trepan broken-nail extractor |
| CN102232866A (en) * | 2010-05-07 | 2011-11-09 | 国华 | Device for taking out fixing screw in orthopaedics |
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| Publication number | Publication date |
|---|---|
| CN103054643A (en) | 2013-04-24 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20180706 Address after: 100176 1 Beijing economic and Technological Development Zone 11 11 Jinghai road. Patentee after: Beijing Keyi Bunn medical equipment science and Technology Co Ltd Address before: 100176 100 Chuang six street, Daxing District economic and Technological Development Zone, Beijing Patentee before: Li Shufan |