CN201734773U - Left-hand threaded anti-slip screw and screwdriver for orthopedics - Google Patents
Left-hand threaded anti-slip screw and screwdriver for orthopedics Download PDFInfo
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- CN201734773U CN201734773U CN2010202843998U CN201020284399U CN201734773U CN 201734773 U CN201734773 U CN 201734773U CN 2010202843998 U CN2010202843998 U CN 2010202843998U CN 201020284399 U CN201020284399 U CN 201020284399U CN 201734773 U CN201734773 U CN 201734773U
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- screw
- screwdriver
- hand thread
- hand threaded
- hole
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Abstract
The utility model relates to a left-hand threaded anti-slip screw and a screwdriver for orthopedics, comprising a screw and a matching screwdriver. The screw is characterized by comprising a screw stem and a screw end with an internal polygonal structure, and the center of the internal polygonal structure (an internal hexagonal structure) of the screw end is provided with a left-hand threaded hole extending downwards. The section of the head of the screwdriver is cylindrical, and the peripheral wall of the head of the screwdriver is provided with left-hand threads which are matched with the left-hand threaded structure of the central hole of the internal polygonal structure of the screw end, i.e., the thread form, diameter, pitch and line number of the left-hand threaded structure on the peripheral wall of the head of the screwdriver are identical to the thread form, diameter, pitch and line number of the left-hand threaded hole in the screw end. The utility model can be applied as follows: the left-hand threaded anti-slip screw can be screwed in through engagement of the ordinary internal hexagonal screwdriver and the internal hexagonal structure of the left-hand threaded anti-slip screw; and the left-hand threaded anti-slip screw can be screwed out through screwing the left-hand threaded screwdriver into the left-hand threaded structure of the left-hand threaded anti-slip screw and continuously screwing the screwdriver in the identical direction after the screwdriver is tightly screwed into the left-hand threaded structure of the left-hand threaded anti-slip screw. The utility model is not only suitable for orthopedics, but also can be applied in other fields.
Description
Technical field:
This utility model relates to screw and screwdriver thereof, particularly a kind of left-hand thread anti-skid screw and screwdriver that is applicable to orthopaedics.
Background technology:
The inside-fixture removal surgery is the common operation of orthopaedics, in general, operates simple relatively; But, bring great difficulty can for simple operation when screw screws out at need.Internal fixation screw clevis branch " one " font commonly used, " ten " font, interior hexagon and quincunx etc., these screws are that driver bit skids in the screw clevis screwing out at need common cause, and cause the reason of skidding have following some: 1) wearing and tearing of screw clevis have just appearred when screwing in screw; 2) indwelling time is longer in vivo for screw, and sclerotin is grown in the screw thread, makes when screwing out screw to overcome bigger resistance, and the probability that screw skids increases; 3) operator's misoperation fails to make screwdriver to rotate on screw axis, deviates from phenomenon to screw when screwing out, and makes the wearing and tearing of screw clevis, causes skidding.Occur immediately after screw skids screwing out difficulty, wanting to continue to screw out this screw not only wastes time and energy, and can bring huge misery to the patient.Skid when as seen, screw screws out and become problem demanding prompt solution.Up to now, still do not have a kind of method and can effectively solve the screw problem of skidding.
Summary of the invention:
The purpose of this utility model just at existing screw in the above-mentioned prior art when screwing out easy problem of slip and a kind of orthopaedics of providing with left-hand thread anti-skid screw and screwdriver.
The purpose of this utility model realizes by following structure: this orthopaedics left-hand thread anti-skid screw and screwdriver, comprise screw and screwdriver matching used with it, wherein: this screw comprises screw rod and is provided with the screw termination of interior polygon structure that the interior polygon structure centre in the screw termination is processed with the left-hand thread hole of downward extension; This driver bit cross section is cylindrical, and be processed with on the outer circle wall with the screw termination in the left-hand thread that is complementary of polygon structure centre hole left-hand thread pore structure, promptly the left-hand thread structure thread form on the driver bit outer circle wall, diameter, pitch, line number average are identical with the left-hand thread hole of polygon structure centre in the screw termination.
In this utility model, the left-hand thread structure thread form on the driver bit, diameter, pitch, line number average are identical with the left-hand thread hole of polygon structure centre in the screw termination.
Described left-hand thread hole can be blind hole structure, also can be through-hole structure.
Interior polygon structure can be interior hexagonal structure, tetragonal, plum-shaped structure.
Characteristics of the present utility model and occupation mode are: the left-hand thread anti-skid screw when screwing in, available common in six side's screwdrivers and its interior mutual chimeric screw-in of hexagonal structure; When screwing out, available left-hand thread screwdriver screws in its left-hand thread structure, wait to screw closely after, continuing in the same way, the rotary screw cutter can screw out screw.As seen, screw of the present invention is when screwing out, and no matter whether the screw clevis skids, and all can screw out screw fast and effectively.
This utility model is applicable to that not only orthopaedics internal fixation and screw take out, and also can be used for being connected and fixed and dismantling of other field associated components.
Description of drawings:
Fig. 1 cuts open figure (blind hole structure) for a kind of structure master of bolt portion in this utility model.
Fig. 2 is the right view of Fig. 1.
Fig. 3 cuts open figure (through-hole structure) for the another kind of structure master of bolt portion in this utility model.
Fig. 4 is the right view of Fig. 3.
Fig. 5 is this utility model driver bit part-structure view.
Fig. 6 is the A-A cutaway view of Fig. 5.
Among the figure: the 1st, screw, the 1.1st, screw rod, the 1.2nd, screw termination, the 1.3rd, interior hexagonal structure, the 1.4th, left-hand thread hole, the 2nd, left-hand thread screwdriver.
The specific embodiment:
This utility model is described further below in conjunction with accompanying drawing (embodiment):
As shown in the figure: this orthopaedics left-hand thread anti-skid screw and screwdriver, comprise screw (1) and left-hand thread screwdriver matching used (2) with it, wherein: described screw comprises screw rod (1.1) and is provided with the screw termination (1.2) of interior hexagonal structure (1.3), be processed with the left-hand thread hole (1.4) of downward extension at the interior hexagonal structure center of screw termination, this left-hand thread hole is blind hole structure (as Fig. 1,2); Described screwdriver (2) cutter head cross section is cylindrical (as Fig. 5,6), and be processed with on the outer circle wall with the screw termination in the left-hand thread that is complementary of hexagonal structure center counterbore left-hand thread structure, promptly the left-hand thread structure thread form on the driver bit outer circle wall, diameter, pitch, line number average are identical with the left-hand thread counterbore at hexagonal structure center in the screw termination.This driver bit can screw mutually with the left-hand thread structure of this screw.The left-hand thread anti-skid screw when screwing in, available common in six side's screwdrivers and its interior mutual chimeric screw-in of hexagonal structure (1.3); When screwing out, available left-hand thread screwdriver (2) screws in its left-hand thread hole, wait to screw closely after, continuing in the same way, the rotary screw cutter can screw out screw (1).
Screw of the present utility model also can be designed to the version shown in Fig. 3,4, and promptly the left-hand thread hole is a through-hole structure.
Claims (5)
1. an orthopaedics is with left-hand thread anti-skid screw and screwdriver, comprise screw and screwdriver matching used with it, it is characterized in that: this screw comprises screw rod and is provided with the screw termination of interior polygon structure that the interior polygon structure centre in the screw termination is processed with the left-hand thread hole of downward extension; This driver bit cross section is cylindrical, and be processed with on the outer circle wall with the screw termination in the left-hand thread that is complementary of polygon structure centre hole left-hand thread structure.
2. orthopaedics according to claim 1 is characterized in that with left-hand thread anti-skid screw and screwdriver: the left-hand thread structure thread form on the driver bit, diameter, pitch, line number average are identical with the left-hand thread hole of polygon structure centre in the screw termination.
3. orthopaedics according to claim 1 and 2 left-hand thread anti-skid screw and screwdriver, it is characterized in that: the left-hand thread hole is a blind hole structure.
4. orthopaedics according to claim 1 left-hand thread anti-skid screw and screwdriver, it is characterized in that: the left-hand thread hole is a through-hole structure.
5. orthopaedics according to claim 1 and 2 left-hand thread anti-skid screw and screwdriver, it is characterized in that: interior polygon structure can be interior hexagonal structure, tetragonal, plum-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202843998U CN201734773U (en) | 2010-08-09 | 2010-08-09 | Left-hand threaded anti-slip screw and screwdriver for orthopedics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202843998U CN201734773U (en) | 2010-08-09 | 2010-08-09 | Left-hand threaded anti-slip screw and screwdriver for orthopedics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201734773U true CN201734773U (en) | 2011-02-09 |
Family
ID=43550051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202843998U Expired - Fee Related CN201734773U (en) | 2010-08-09 | 2010-08-09 | Left-hand threaded anti-slip screw and screwdriver for orthopedics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201734773U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014075256A1 (en) * | 2012-11-15 | 2014-05-22 | Ho Chih-Chung | Dental implant with first internal thread and second internal thread |
| EP3139047A1 (en) * | 2015-08-26 | 2017-03-08 | Chaoyi Li | Semi-left-hand-thread-removal screw |
-
2010
- 2010-08-09 CN CN2010202843998U patent/CN201734773U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014075256A1 (en) * | 2012-11-15 | 2014-05-22 | Ho Chih-Chung | Dental implant with first internal thread and second internal thread |
| EP3139047A1 (en) * | 2015-08-26 | 2017-03-08 | Chaoyi Li | Semi-left-hand-thread-removal screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20140809 |
|
| EXPY | Termination of patent right or utility model |