CN103054643A - Broken nail extractor - Google Patents
Broken nail extractor Download PDFInfo
- Publication number
- CN103054643A CN103054643A CN2012105705940A CN201210570594A CN103054643A CN 103054643 A CN103054643 A CN 103054643A CN 2012105705940 A CN2012105705940 A CN 2012105705940A CN 201210570594 A CN201210570594 A CN 201210570594A CN 103054643 A CN103054643 A CN 103054643A
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- China
- Prior art keywords
- broken nail
- trepan
- taking out
- hollow
- drill
- 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.)
- Granted
Links
- 241000425571 Trepanes Species 0.000 claims description 38
- 210000003041 ligament Anatomy 0.000 claims description 7
- 210000000988 bone and bone Anatomy 0.000 abstract description 12
- 238000005553 drilling Methods 0.000 abstract description 3
- 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
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 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 will in the Orthopeadic Surgery internal fixation operation or performing the operation.
Background technology
Use at present in the hone lamella screw fixedly is the method for common treatment fracture, but owing to screw quality or other reason, the phenomenon that screw fractures occurs sometimes in clinical use or after the operation, how successfully to take out the screw of fracture, not causing again the too much destruction of sclerotin, is the difficult problem that the Orthopeadic Surgery doctor need to solve.
For many years, most hospitals adopt osteotome that the bone around the broken nail is removed, it is taken out grasping broken nail with nail-fetching device, 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 to get bone with osteotome first, with the broken nail device there is following defective in the broken nail taking-up: 1) get bone with osteotome, bone removes a lot, the bone infringement is larger, and 2) use inconvenience.The nail-fetching device that producer the provides T-shaped handle that at first must turn clockwise will grasp head and unclamp, and it be grasped broken nail broken nail is firmly grasped being rotated counterclockwise handle, with its taking-up.Troublesome poeration prolongs 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 the trepan endoporus, and the outer rear portion of this end tooth is taper, is provided with the drill-bit type spiral grooves at tapered back end; Be provided with female thread at hollow trepan rear portion, be provided with screw needle in hollow trepan, this screw needle front end stretches out the 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 ligament f, and this ligament 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 cooperating 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 boss, and this connecting rod front end is provided with a word protruding
The word groove that platform cooperates, the rear end one word boss of this screw needle and a word groove of connecting rod front end are joined
Close in the left hand thread at the hollow trepan of rear screw-in 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 the α cone angle, non-resistance when the bone that drills through around the broken nail.
2, head has a plurality of end teeth, and end sword degree of depth 0.6-1.8mm is sharper when drilling through bone.
3, the specification according to broken nail is different, and the hollow trepan of different size diameter is arranged.
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 f (ligament) is arranged, sharply when drilling through bone is beneficial to again the bone that venting removes.
5, tailing screw flight is left hand thread, and it screws direction and to drill through direction consistent when being used in conjunction with screw needle and connecting rod, avoids connecting thread that the generation of loosening phenomenon is arranged.
Description of drawings
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 is Fig. 5 A-A section structure for amplifying schematic diagram.
Fig. 7 is 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:
Referring to Fig. 1-shown in Figure 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, the center of this end tooth 15 is provided with trepan endoporus 11, and the outer rear portion of this end tooth 15 is taper, is provided with drill-bit type spiral grooves 16 at tapered back end; Be provided with female thread 13 at hollow trepan 1 rear portion, be provided with screw needle 3 in hollow trepan 1, 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 ligament f, and this ligament 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 cooperating 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 boss 22, these connecting rod 3 front ends are provided with a word groove 32 that cooperates with a word boss 22, screw in the left hand thread at hollow trepan 1 rear portion after the rear end one word boss 22 of this screw needle 3 cooperates with a word groove 32 of connecting rod 3 front ends.
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 the human body, when getting broken nail, screwed in by core drill tailing screw flight place after first the flat recess of a word boss of connecting rod one end and screw needle one end being worked good, the other end of connecting rod connects fast connecting handle.Apply external force and be rotated counterclockwise handle, core drill drills through to the broken nail direction, remove broken nail bone on every side until screw needle contact broken nail, take out first Novel cut nail extractor, and the taking-up screw needle, then again Novel cut nail extractor is assembled, continue boring, enter about core drill 10mm until broken nail exposes, the core drill that turns clockwise takes out the nail road to broken nail.
Claims (10)
1. 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, is provided with drill-bit type spiral grooves (16) at tapered back end; Be provided with female thread (13) at hollow trepan rear portion, 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 Novel cut nail extractor trepan 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 ligament f, and this ligament 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 cooperating 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 is characterized in that, described screw needle
(3) middle part, rear end is provided with a word boss (22), this connecting rod front end is provided with a word groove (32) that cooperates with a word boss, screws in the left hand thread at hollow trepan rear portion after the rear end one word boss of this screw needle and the word groove fit of connecting rod front end.
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 true CN103054643A (en) | 2013-04-24 |
| CN103054643B CN103054643B (en) | 2014-11-26 |
Family
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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) |
Cited By (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 (9)
| 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 |
| US20070123909A1 (en) * | 2005-10-27 | 2007-05-31 | Rupp Glenn A | Extractor For Broken Bone Screws |
| 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 |
| 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 (9)
| 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 |
| US20070123909A1 (en) * | 2005-10-27 | 2007-05-31 | Rupp Glenn A | Extractor For Broken Bone Screws |
| 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 |
| CN203042424U (en) * | 2012-12-25 | 2013-07-10 | 李书凡 | Extractor for broken nails |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103054643B (en) | 2014-11-26 |
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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 | ||
| TR01 | Transfer of patent right | ||
| 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 |