CN2774416Y - Expansion screw - Google Patents
Expansion screw Download PDFInfo
- Publication number
- CN2774416Y CN2774416Y CN 200520012181 CN200520012181U CN2774416Y CN 2774416 Y CN2774416 Y CN 2774416Y CN 200520012181 CN200520012181 CN 200520012181 CN 200520012181 U CN200520012181 U CN 200520012181U CN 2774416 Y CN2774416 Y CN 2774416Y
- Authority
- CN
- China
- Prior art keywords
- screw
- sleeve
- swivel nut
- expansion
- swell fixture
- 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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- Prostheses (AREA)
Abstract
The utility model relates to an expansion screw of an inner fixer for clinical orthopedics, which is composed of an inner screw bolt, an expansion screw sleeve and a fixing claw, wherein the tail part of a screw rod of the inner screw bolt is shortened in a radial direction and forms a circular cone shape, the outer diameter of the expansion screw sleeve is provided with screw threads, the shape of a sleeve barrel at the tail part of the screw threads is matched with that of the tail part of the inner screw bolt rod, a plurality of notches each of which forms a flume shape are formed on the sleeve barrel, and the contact faces of the walls of the sleeve barrel of the screw sleeve are overlapped with one another; a fixing claw is provided with a shim with claws, the outer diameter of the shim is provided with a plurality of convex flat claws or bending claws, the inner screw bolt is in screw thread connection with the expansion screw sleeve, and the fixing claw is arranged between a screw bolt head and the expansion screw sleeve. When the expansion screw is used for treating the fractures of special parts, the fracture parts can be firmly fixed, and the phenomena of fixity looseness, fracture block displacement, etc. can not occur, and the utility model has the advantages of simple and quick operation, small damage and low screw consumption, and can be popularized and applied to orthopedics clinics.
Description
Affiliated technical field
This utility model relates to a kind of internal fixation device swell fixture of orthopaedics clinical practice, is suitable for treating the privileged sites fracture.
Background technology
Orthopaedics therapy medial and lateral malleolus fracture, the interior outside condylar fracture of humerus, femur is when fracture of femoral neck and olecranal fracture, forcing screw commonly used or internal fixation devices such as Kirschner wire, steel wire become flexible the sclerite displacement but fixture appears in these apparatuses easily, more with nail, operation is than drawbacks such as difficulties.Present swell fixture afterbody sleeve is a slit opening, in sclerotin is easily grown into the opening of distending during clinical practice, is difficult for taking out swell fixture after the union of fracture.
Summary of the invention
The purpose of this utility model just is to avoid orthopaedics clinical treatment privileged sites fracture all drawbacks of appearance easily, adopt advanced configuration, change fixed form, make the fracture site fixation, both reduced with nail, simple to operate again, rapid, damage is little, sclerotin is difficult for growing in the opening of expansion swivel nut afterbody distending, takes out swell fixture after the union of fracture easily.
The clinical internal fixation device swell fixture of using of this orthopaedics is made up of inner bolt, expansion swivel nut and fixed claw.Inner bolt is threaded with the expansion swivel nut, and fixed claw places between bolt head and the expansion swivel nut.
The inner bolt head is hexagon, opening or other shape, and screw flight radially dwindles with lower tail and is coniform.Expansion swivel nut external diameter is threaded, and its afterbody sleeve and inner bolt screw rod tail shape adapt, and has several skewed slot shape openings, and opening part swivel nut sleeve wall contact surface laminates mutually.Expansion swivel nut outer-diameter threads embeds in the sclerotin, and the effect of anti-retaining nail is arranged.Fixed claw is the pad of band pawl, and flat pawl of several convexs of pad external diameter band or curved jaws are used to grasp sclerite.The expansion swivel nut is provided with several bellmouths, is convenient to use when swell fixture takes out special extractor.
Swell fixture can be designed plurality of specifications according to its diameter, length scale, selects for use during for use.
Select length, swell fixture that diameter is suitable for use according to X-ray film, fix sclerite, with the bit bore identical with the swell fixture diameter, insert swell fixture, progressively screw inner bolt, the cone reach of its afterbody, distending expansion swivel nut skewed slot shape opening, because opening part swivel nut sleeve wall contact surface inclined-plane laminates mutually, the expansion swivel nut that expands still has the part contact surface to laminate mutually, prevents that sclerotin from growing into.Its external screw thread close and firm embeds in the sclerotin, and fixed claw compresses and grasp sclerite, prevents its rotation, loosening.According to the fracture site difference, select the fixed claw of different size for use, make it can compress and grasp firm sclerite and be advisable.Treat that fracture fully after the healing, when taking out swell fixture, screws out inner bolt earlier, take out fixed claw, block the bellmouth of expansion swivel nut head, taking-up expansion swivel nut with special extractor.
This swell fixture is used for the treatment of privileged sites when fracture, can make the fracture site fixation, phenomenons such as fixture is loosening, sclerite displacement can not occur, and simple to operate, rapid, damage is little, few with nail, be suitable for the orthopaedics clinical application.
Description of drawings
Fig. 1 is the swell fixture front view
Fig. 2 is a swell fixture A-A view
Fig. 3 is the fixed claw structural representation
The specific embodiment
Introduce embodiment of the present utility model below in conjunction with accompanying drawing:
This swell fixture is made up of inner bolt (1), expansion swivel nut (2) and fixed claw (3).Inner bolt (1) is a top single radial cut bolt, and screw flight radially dwindles with lower tail and is coniform.Expansion swivel nut (2) external diameter is threaded, and its afterbody sleeve and inner bolt (1) screw rod tail shape adapt, and have four skewed slot openings, and opening part spiral shell swivel nut barrel contact surface laminates mutually.Fixed claw (3) is band claw pad sheet, two convex bending pawls of pad external diameter band.Inner bolt (1) is threaded with expansion swivel nut (2).Fixed claw (3) places between bolt (1) head and the expansion swivel nut (2).
Claims (6)
1. a kind of internal fixation device swell fixture of orthopaedics clinical practice is characterized in that being made up of inner bolt, expansion swivel nut and fixed claw, and inner bolt is threaded with the expansion swivel nut, and fixed claw places between bolt head and the expansion swivel nut.
2. swell fixture according to claim 1 is characterized in that inner bolt is turret head or open top bolt, and screw flight radially dwindles with lower tail and is coniform.
3. swell fixture according to claim 1, the swivel nut external diameter that it is characterized in that expanding is threaded, and its afterbody sleeve and inner bolt screw rod tail shape adapt, and have several skewed slot shape openings.
4. swell fixture according to claim 3, the swivel nut afterbody sleeve that it is characterized in that expanding has four skewed slot shape openings, and opening part swivel nut sleeve wall contact surface laminates mutually.
5. swell fixture according to claim 1 is characterized in that fixed claw is the pad of band pawl, flat pawl of several convexs of pad external diameter band or curved jaws.
6. swell fixture according to claim 5 is characterized in that fixed claw is the pad of band pawl, two flat pawls of convex of pad external diameter band or curved jaws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520012181 CN2774416Y (en) | 2005-03-28 | 2005-03-28 | Expansion screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520012181 CN2774416Y (en) | 2005-03-28 | 2005-03-28 | Expansion screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2774416Y true CN2774416Y (en) | 2006-04-26 |
Family
ID=36748713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520012181 Expired - Fee Related CN2774416Y (en) | 2005-03-28 | 2005-03-28 | Expansion screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2774416Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502440B (en) * | 2009-03-11 | 2011-08-31 | 艾玉峰 | Absorbable expansion bone rivet |
| CN109659832A (en) * | 2019-01-22 | 2019-04-19 | 河南工信柜架有限公司 | A kind of Novel loop box body |
-
2005
- 2005-03-28 CN CN 200520012181 patent/CN2774416Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502440B (en) * | 2009-03-11 | 2011-08-31 | 艾玉峰 | Absorbable expansion bone rivet |
| CN109659832A (en) * | 2019-01-22 | 2019-04-19 | 河南工信柜架有限公司 | A kind of Novel loop box body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |