CN201861745U - Improved orthopaedic screw - Google Patents
Improved orthopaedic screw Download PDFInfo
- Publication number
- CN201861745U CN201861745U CN2010205931596U CN201020593159U CN201861745U CN 201861745 U CN201861745 U CN 201861745U CN 2010205931596 U CN2010205931596 U CN 2010205931596U CN 201020593159 U CN201020593159 U CN 201020593159U CN 201861745 U CN201861745 U CN 201861745U
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- Prior art keywords
- groove
- screw
- triangular
- screwdriver
- orthopaedic screw
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- Expired - Fee Related
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Abstract
The utility model relates to an improved orthopaedic screw, belongs to the technical field of an orthopaedic surgical instrument and aims to solve the problem of slipping generated when the screw is screwed in and out in a surgery. The improved orthopaedic screw consists of a screw rod and a nut. The nut is provided with an inner hexagonal groove. An inner triangular groove is additionally arranged at the position of the inner hexagonal groove. The midsection of the inner triangular groove is coincident with that of the inner hexagonal groove. Three vertex angle parts of the inner triangular groove protrude out of the inner hexagonal groove. The projecting parts at the vertex angles of the inner triangular groove can be positioned on three nonadjacent hexagonal sides of the inner hexagonal groove; or each side of the inner hexagonal groove can be provided with the projecting part and when the improved orthopaedic screw is used, any three nonadjacent sides are selected. For the orthopaedic screw which adopts the structure, in the using process of improved orthopaedic screw, when an inner hexagonal screwdriver slips, a triangular screwdriver can be adopted for carrying out operation. The moment that the triangular groove is meshed with the triangular screwdriver is large, so that the slipping phenomenon is difficult to occur, the problem that the orthopaedic screw slips is solved, the surgery is guaranteed to be carried out successfully and the pain of a patient is reduced.
Description
Technical field
The screw that this utility model uses when relating to a kind of bone surgery belongs to the bone surgery set technical field.
Background technology
In bone surgery, often need to use various screws such as dog screw, trip bolt, in these screws, have much and need take out in the operation later stage.Orthopaedic screw commonly used, instrument takes up room for a short time for precession and when screwing out, and is hexagonal socket nut with its tail end nut designs all generally, adopts inner hexagon spanner or interior hexagonal screwdriver during operation.In use find, especially take out in the process of screw, when using screwdriver to screw out screw, the phenomenon of screw slide fastener can occur, screw can not be screwed out, prolonged operating time, brought infringement to the patient.
Causing the reason of this situation to be, when screwing out screw with screwdriver, is to rely on the interior hexagonal groove of nut and the outer-hexagonal projection of screwdriver to be meshing with each other, and the angle of cut place of interior outer-hexagonal forms moment, and the outer-hexagonal of screwdriver drives the interior hexagonal of nut and rotates, and screw is screwed out.And the limit number of groove is many more, and the angle of the angle of cut is big more, and the whole periphery of groove is the trend circle more, and the mutual moment between the inside and outside angle of cut is more little.Because the hardness of general screwdriver is greater than the hardness of screw, so the outer-hexagonal of screwdriver is easy to the interior hexagonal of nut is damaged the formation slide fastener.In order to change this situation, be necessary the screw that uses in the bone surgery is improved.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of improved orthopaedic screw that screws in and be difficult for producing the slide fastener phenomenon when screwing out screw in operation.
The technical scheme that solves the problems of the technologies described above is:
A kind of improved orthopaedic screw, it is made up of shank of screw, nut, interior hexagonal groove is arranged in the nut, its improvements are, triangle groove in interior hexagonal groove place increases, the middle body of interior triangle groove overlaps with the middle body of interior hexagonal groove, and three top corner portion of interior triangle groove are given prominence to outside interior hexagonal groove.
Above-mentioned improved orthopaedic screw, the ledge of triangle groove drift angle is positioned on non-conterminous three hexagons of hexagonal groove in described, also can on each limit, be equipped with the outstanding position of triangle groove drift angle, can select during use on any non-conterminous three limits.
Adopt the orthopaedic screw of this structure, in using during hexagonal screwdriver generation slide fastener, can adopt the triangle screwdriver to operate, because triangular groove and the intermeshing moment of triangle screwdriver are bigger, be difficult to take place the slide fastener phenomenon, solve the problem of orthopaedic screw generation slide fastener, guaranteed carrying out smoothly of operation, also alleviated patient's misery.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the side view of Fig. 1.
Labelling is as follows among the figure: shank of screw 1, nut 2, interior hexagonal groove 3, interior triangle groove 4.
The specific embodiment
Show among the figure that this utility model is a kind of improved orthopaedic screw, it comprises shank of screw 1 and nut 2, hexagonal groove 3 on nut 2, having, and using inner hexagon spanner or interior hexagonal screwdriver to insert interior hexagonal groove 3 can screw in screw or screw out.
In order to solve screw produces slide fastener in operation problem, increased interior triangle groove 4 on the basis of this utility model hexagonal groove 3 in original.The middle body of interior triangle groove 4 overlaps with the middle body of interior hexagonal groove 3, three top corner portion of interior triangle groove 4 are given prominence to outside interior hexagonal groove 3, and the ledge of the drift angle of interior triangle groove is positioned on non-conterminous three hexagons of hexagonal groove.Also can on each limit, be equipped with the outstanding position of triangle groove drift angle, can select during use on any non-conterminous three limits.
In the operation, in using during hexagonal screwdriver generation slide fastener, can adopt the triangle screwdriver to operate, because the intermeshing moment of triangular groove and triangle screwdriver is bigger, be difficult to take place the slide fastener phenomenon, solve the problem of orthopaedic screw generation slide fastener, guaranteed carrying out smoothly of operation, also alleviated patient's misery.
Claims (3)
1. improved orthopaedic screw, it is made up of shank of screw [1], nut [2], interior hexagonal groove [3] is arranged on the nut [2], it is characterized in that: triangle groove [4] in interior hexagonal groove [3] is located to increase, the middle body of interior triangle groove [4] overlaps with the middle body of interior hexagonal groove [3], and three top corner portion of interior triangle groove [4] are given prominence to outside interior hexagonal groove [3].
2. improved orthopaedic screw according to claim 1 is characterized in that: the ledge of the drift angle of triangle groove [4] is positioned on non-conterminous three hexagons of hexagonal groove [3] in described.
3. improved orthopaedic screw according to claim 1 is characterized in that: be equipped with the outstanding position of triangle groove drift angle in described on each limit of hexagonal groove [3].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205931596U CN201861745U (en) | 2010-11-05 | 2010-11-05 | Improved orthopaedic screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205931596U CN201861745U (en) | 2010-11-05 | 2010-11-05 | Improved orthopaedic screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201861745U true CN201861745U (en) | 2011-06-15 |
Family
ID=44132913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205931596U Expired - Fee Related CN201861745U (en) | 2010-11-05 | 2010-11-05 | Improved orthopaedic screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201861745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107252346A (en) * | 2017-05-31 | 2017-10-17 | 梁兴斌 | A kind of orthopaedics band cap lock screw |
-
2010
- 2010-11-05 CN CN2010205931596U patent/CN201861745U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107252346A (en) * | 2017-05-31 | 2017-10-17 | 梁兴斌 | A kind of orthopaedics band cap lock screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20111105 |