CN208435784U - Extractor of orthopedic slipped screws - Google Patents
Extractor of orthopedic slipped screws Download PDFInfo
- Publication number
- CN208435784U CN208435784U CN201721296652.XU CN201721296652U CN208435784U CN 208435784 U CN208435784 U CN 208435784U CN 201721296652 U CN201721296652 U CN 201721296652U CN 208435784 U CN208435784 U CN 208435784U
- Authority
- CN
- China
- Prior art keywords
- knife handle
- handle sleeve
- inner core
- cutter head
- matched
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of extractor of orthopedic slipped screws, including taking out cutter head, the end for taking out cutter head is inflation openings, also there is knife handle sleeve, take out the end that cutter head is mounted on knife handle sleeve, also there is inner core, inner core protrudes into the inner cavity of knife handle sleeve, it is matched with cutter head is taken out, the rear end of knife handle sleeve is equipped with nut set, the periphery of inner core has the screw thread matched with nut set, after in the inner cavity that inner core extend into knife handle sleeve, pass through rotary inner core, screw thread is matched with nut set, inner core can be moved forward and backward in the inner cavity of knife handle sleeve, the forward end of inner core has conehead, when inner core advances in the inner cavity of knife handle sleeve, conehead is extend into the inner cavity for taking out cutter head, push inflation openings expansion.The utility model structure is simple, easy to use, while capable of reliably taking out slipped screws, it is ensured that screw is vertically extracted, and does not cause secondary injury to patient.
Description
Technical field
The utility model relates to the screw withdrawing devices after bone surgery specific purpose tool more particularly to a kind of stripped thread.
Background technique
Clinical treatment limbs fracture, fixation is a kind of common modus operandi in open reduction steel plate screw, after surgery
Rehabilitation course in need by screw, steel plate take out.But since screw is mostly titanium alloy material, quality is softer, and conventional screw-driver in order is met
To big resistance lock screw, stripped thread occurs because screwing to often result in due to hexagonal groove is destroyed in screw tail cap repeatedly.
And after stripped thread situation occurs, the operating time that screw, steel plate take out extends, wound exposes for a long time, infection chance
Increase, and went that violence is taken to take nail, and will cause the secondary injury of patient；
Further, in the operation for taking out screw, movement skew, screw when often occurring to extract screw due to doctor
The case where can not vertically extracting, causing patient's secondary injury.
Utility model content
Purpose of the utility model is to solve disadvantage existing in the prior art, and a kind of structure proposed it is simple,
It is easy to use, while capable of reliably taking out slipped screws, it is ensured that screw is vertically extracted, and the bone of secondary injury is not caused to patient
Section's extractor for thread-stripping screws.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of extractor of orthopedic slipped screws, including cutter head is taken out, the end for taking out cutter head is inflation openings, also has knife
Sleeve cylinder takes out cutter head and is mounted on the end of knife handle sleeve, also has inner core, and inner core protrudes into the inner cavity of knife handle sleeve, and takes
Cutter head matches out, and the rear end of knife handle sleeve is equipped with nut set, and the periphery of inner core has the screw thread matched with nut set, when interior
After core is extend into the inner cavity of knife handle sleeve, by rotary inner core, screw thread is matched with nut set, and inner core can be in knife handle sleeve
Inner cavity in be moved forward and backward, the forward end of inner core has conehead, and when inner core advances in the inner cavity of knife handle sleeve, conehead is protruded into
Into the inner cavity for taking out cutter head, inflation openings expansion is pushed.
Also there is locating rack, locating rack includes fixed ring, and the front end of fixed ring has against ring, and the end of fixed ring has
Linking arm, the surface of linking arm have sliding block, also have a knife handle sleeve fixing pipe, the outer wall of knife handle sleeve fixing pipe have with
The guide rail that sliding block matches, by the cooperation of sliding block and guide rail, knife handle sleeve fixing pipe is slidably connected with linking arm, knife handle sleeve
The inner cavity front end of fixing pipe has fixture, and fixture includes knife handle sleeve bracket, and the setting of knife handle sleeve bracket is fixed in knife handle sleeve
The inner wall of pipe, the briquetting matched with knife handle sleeve bracket is additionally provided on the inner wall of knife handle sleeve fixing pipe, and briquetting includes fixing
Screw rod on the fixed inside pipe wall of knife handle sleeve, screw rod are equipped with matched nut block, and the end of nut block has sponge
Block, by fixture, knife handle sleeve fixing pipe can be fixedly mounted on knife handle sleeve.
The end against ring has silica gel sheath.
The rear end end of the inner core, which has, holds disk.
The peripheral surface of the inflation openings has Saw blade.
The rear end of the silica gel sheath has attaching ring, and the rear end of attaching ring has convex portion, against the surface of ring be provided with it is convex
The pit that son matches, by the cooperation of convex portion and pit, silica gel sheath grafting is mounted on ring.
The inner wall of the inflation openings has the mating surface matched with conehead, and the section of mating surface is inclined-plane, and is cooperated
Height N of the section in face close to conehead one end is less than the height M of the section other end of mating surface.
After adopting the above structure, as follows the advantages of the utility model:
The utility model can reliably take out the screw of stripped thread first, in use, will take out the inflation openings of cutter head first
It protrudes into the hexagonal groove of the screw of stripped thread, inner core is extend into knife handle barrel bore thereafter, it is interior by rotating inner core
The screw thread of outer core is matched with nut set, and inner core constantly extend into knife handle barrel bore, until arriving at the expansion for taking out cutter head
Opening, at this point, the conehead of inner core end can extrusion expansion opening (structure of inflation openings is similar to the fixed lead for retractable pencil head of compasses
Limb), inflation openings can be resisted against in the hexagonal groove of screw, take out cutter head to the holding power of screw to increase,
The movement that cutter head is taken out by extracting, can take out slipped screws.
And it is further, the utility model can guarantee that the movement of doctor is indeformable while taking out screw, as far as possible
Ensure that screw is vertically extracted, in use, knife handle sleeve fixing pipe can be installed on to the outside of knife handle sleeve, and passes through folder
Tool is fixed, and holds locating rack thereafter, pushes knife handle sleeve fixing pipe, and knife handle sleeve is driven to advance, and is passed through in this way, taking out cutter head
Expose against ring, in this manner it is possible to extend into cutter head is taken out in the hexagonal groove of screw, by rotary inner core, supports big expansion
Opening continues to grip locating rack, it is ensured that be resisted against patient against ring after taking cutter head and being resisted against in the hexagonal groove of screw
Skin on, hold knife handle sleeve fixing pipe and pull back, knife handle sleeve can be driven rearward to move, take out screw, in this way, logical
It crosses against ring, the movement of doctor just has supporting point, it is not easy to deformation is acted in withdrawal process.
And the end against ring has silica gel sheath, when silica gel sheath can guarantee to be resisted against on patient skin against ring,
It is less likely to occur to skid, it is ensured that the reliability of the utility model, and it is further, silica gel sheath rear end has attaching ring, attaching ring
Rear end have convex portion, the pit matched with convex portion is provided with against the surface of ring, passes through the cooperation of convex portion and pit, silica gel sheath
Grafting is mounted on ring, and such structure is to ensure that silica gel sheath can be replaced after surgery, it is ensured that health, this is practical
Novel removing silica gel sheath can be carried out disinfecting, and be able to carry out next use, has saved hospital costs, has also reduced simultaneously
The burden of patient.
And the peripheral surface of the inflation openings has Saw blade, Saw blade enables to the hexagonal of inflation openings and screw
Groove increases frictional force, can more reliably take out screw.
And the inner wall of the inflation openings has the mating surface matched with conehead, the section of mating surface is inclined-plane, and is matched
Height N of the section in conjunction face close to conehead one end is less than the height M of the section other end of mating surface, passes through mating surface and conehead
Cooperation, inflation openings are more easier to be softened, at the same such structure can guarantee the end of inflation openings be more easier by
It struts.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the utility model fixture 15；
Fig. 3 is the structural schematic diagram of the utility model inflation openings 2.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
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.
Referring to Fig.1-3, a kind of extractor of orthopedic slipped screws, including cutter head 1 is taken out, the end for taking out cutter head 1 is expansion
Opening 2 also has knife handle sleeve 3, takes out the end that cutter head 1 is mounted on knife handle sleeve 3, also has inner core 4, inner core 4 protrudes into knife
It in the inner cavity of sleeve cylinder 3, is matched with cutter head 1 is taken out, the rear end of knife handle sleeve 3 is equipped with nut set 5, and the periphery of inner core 4 has
With 5 screw threads 6 that match of nut set, after in the inner cavity that inner core 4 extend into knife handle sleeve 3, by rotary inner core 4, screw thread 6 with
Nut set 5 matches, and inner core 4 can be moved forward and backward in the inner cavity of knife handle sleeve 3, and the forward end of inner core 4 has conehead 7,
When inner core 4 advances in the inner cavity of knife handle sleeve 3, conehead 7 is extend into the inner cavity for taking out cutter head 1, pushes inflation openings 2 swollen
It is swollen.
Also there is locating rack 8, locating rack 8 includes fixed ring 9, and the front end of fixed ring 9 has against ring 10, fixed ring 9
End has linking arm 11, and the surface of linking arm 11 has sliding block 12, also has knife handle sleeve fixing pipe 13, and knife handle sleeve is solid
The outer wall for determining pipe 13 has the guide rail 14 matched with sliding block 12, and by the cooperation of sliding block 12 and guide rail 14, knife handle sleeve is fixed
Pipe 13 is slidably connected with linking arm 11, and the inner cavity front end of knife handle sleeve fixing pipe 13 has fixture 15, and fixture 15 includes knife handle set
Cylinder bracket 16, knife handle sleeve bracket 16 are arranged in the inner wall of knife handle sleeve fixing pipe 13, on the inner wall of knife handle sleeve fixing pipe 13
It is additionally provided with the briquetting 27 matched with knife handle sleeve bracket 16, briquetting 27 includes being fixed on 13 inner wall of knife handle sleeve fixing pipe
Screw rod 17, screw rod 17 are equipped with matched nut block 18, and the end of nut block 18 has sponge block 19, by fixture 15,
Knife handle sleeve fixing pipe 13 can be fixedly mounted on knife handle sleeve 3.
The end against ring 10 has silica gel sheath 20.
The rear end end of the inner core 4, which has, holds disk 21.
The peripheral surface of the inflation openings 2 has Saw blade 22.
The rear end of the silica gel sheath 20 has attaching ring 23, and the rear end of attaching ring 23 has convex portion 24, against the table of ring 10
Face is provided with the pit 25 matched with convex portion 24, by the cooperation of convex portion 24 and pit 25,20 grafting of silica gel sheath be mounted on against
On ring 10.
The inner wall of the inflation openings 2 has the mating surface 26 matched with conehead 7, and the section of mating surface 26 is inclined-plane,
And height N of the section of mating surface 26 close to 7 one end of conehead is less than the height M of the section other end of mating surface 26.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (7)
1. a kind of extractor of orthopedic slipped screws, including cutter head (1) is taken out, the end for taking out cutter head (1) is inflation openings (2),
Also there are knife handle sleeve (3), take out the end that cutter head (1) is mounted on knife handle sleeve (3), it is characterised in that: also there is inner core
(4), inner core (4) protrudes into the inner cavity of knife handle sleeve (3), matches with cutter head (1) is taken out, the rear end of knife handle sleeve (3) is equipped with
Nut set (5), the periphery of inner core (4) has the screw thread (6) matched with nut set (5), when inner core (4) extend into knife handle sleeve
(3) after in inner cavity, by rotary inner core (4), screw thread (6) is matched with nut set (5), and inner core (4) can be in knife handle sleeve
(3) it is moved forward and backward in inner cavity, the forward end of inner core (4) has conehead (7), when inner core (4) is in the inner cavity of knife handle sleeve (3)
Middle advance, conehead (7) are extend into the inner cavity for taking out cutter head (1), push inflation openings (2) expansion.
2. extractor of orthopedic slipped screws according to claim 1, which is characterized in that also there are locating rack (8), locating rack
It (8) include fixed ring (9), the front end of fixed ring (9) has against ring (10), and the end of fixed ring (9) has linking arm (11),
The surface of linking arm (11) has sliding block (12), also has a knife handle sleeve fixing pipe (13), knife handle sleeve fixing pipe (13) it is outer
Wall has the guide rail (14) matched with sliding block (12), passes through the cooperation of sliding block (12) and guide rail (14), knife handle sleeve fixing pipe
(13) it is slidably connected with linking arm (11), the inner cavity front end of knife handle sleeve fixing pipe (13) has fixture (15), fixture (15) packet
Knife handle sleeve bracket (16) is included, the side inner wall in knife handle sleeve fixing pipe (13), knife handle set is arranged in knife handle sleeve bracket (16)
The briquetting (27) matched with knife handle sleeve bracket (16), briquetting (27) packet are additionally provided on the other side inner wall of cylinder fixing pipe (13)
The screw rod (17) being fixed on knife handle sleeve fixing pipe (13) inner wall is included, screw rod (17) is equipped with matched nut block
(18), the end of nut block (18) has sponge block (19), and by fixture (15), knife handle sleeve fixing pipe (13) can fix peace
On knife handle sleeve (3).
3. extractor of orthopedic slipped screws according to claim 2, which is characterized in that the end against ring (10) has
There are silica gel sheath (20).
4. extractor of orthopedic slipped screws according to claim 1, which is characterized in that the rear end end of the inner core (4)
With gripping disk (21).
5. extractor of orthopedic slipped screws according to claim 1, which is characterized in that the periphery of the inflation openings (2)
Surface has Saw blade (22).
6. extractor of orthopedic slipped screws according to claim 3, which is characterized in that the rear end of the silica gel sheath (20) has
Have attaching ring (23), the rear end of attaching ring (23) has convex portion (24), is provided with against the surface of ring (10) and matches with convex portion (24)
The pit (25) of conjunction, by the cooperation of convex portion (24) and pit (25), silica gel sheath (20) grafting is mounted on ring (10).
7. extractor of orthopedic slipped screws according to claim 1, which is characterized in that the inner wall of the inflation openings (2)
With the mating surface (26) matched with conehead (7), the section of mating surface (26) is inclined-plane, and the section of mating surface (26) is close
The height N of conehead (7) one end is less than the height M of the section other end of mating surface (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721296652.XU CN208435784U (en) | 2017-10-09 | 2017-10-09 | Extractor of orthopedic slipped screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721296652.XU CN208435784U (en) | 2017-10-09 | 2017-10-09 | Extractor of orthopedic slipped screws |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208435784U true CN208435784U (en) | 2019-01-29 |
Family
ID=65094834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721296652.XU Expired - Fee Related CN208435784U (en) | 2017-10-09 | 2017-10-09 | Extractor of orthopedic slipped screws |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208435784U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110623722A (en) * | 2019-09-26 | 2019-12-31 | 河北医科大学第三医院 | Broken intramedullary nail main nail extracting device |
| CN114888757A (en) * | 2022-06-29 | 2022-08-12 | 中国科学院空间应用工程与技术中心 | Screw taking-out device |
-
2017
- 2017-10-09 CN CN201721296652.XU patent/CN208435784U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110623722A (en) * | 2019-09-26 | 2019-12-31 | 河北医科大学第三医院 | Broken intramedullary nail main nail extracting device |
| CN110623722B (en) * | 2019-09-26 | 2022-07-26 | 河北医科大学第三医院 | Broken intramedullary nail main nail extracting device |
| CN114888757A (en) * | 2022-06-29 | 2022-08-12 | 中国科学院空间应用工程与技术中心 | Screw taking-out device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190624 Address after: 213000 29, Xing Long Lane, Tianning District, Changzhou, Jiangsu Patentee after: Changzhou second the People's Hospital Address before: 213000 Room 701, Unit B, 24 Renmin Home Building, Tianning District, Changzhou City, Jiangsu Province Patentee before: Jiang Shijie |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190129 Termination date: 20201009 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |