CN201531505U - Special theftproof thread fastening piece - Google Patents
Special theftproof thread fastening piece Download PDFInfo
- Publication number
- CN201531505U CN201531505U CN2009201858387U CN200920185838U CN201531505U CN 201531505 U CN201531505 U CN 201531505U CN 2009201858387 U CN2009201858387 U CN 2009201858387U CN 200920185838 U CN200920185838 U CN 200920185838U CN 201531505 U CN201531505 U CN 201531505U
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- CN
- China
- Prior art keywords
- screw
- nut
- utility
- model
- thread
- 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 special theftproof thread fastening piece, including a screw and a nut; the head of screw is a cylindrical tack inner pentagon screw; a pin is arranged in the center of the inner pentagon; the nut is provided with a large thread aperture and a small thread aperture; the thread is ranged from M3 to M30; and five edges of the cylindrical tack inner pentagon on the head of screw are circular arcs. The utility model has the beneficial effects of simple structure, low cost and burglary prevention.
Description
Technical field
The utility model relates to the antitheft threaded fastener of a kind of special use, particularly a kind of special-purpose antitheft threaded fastener that comprises screw, nut.
Background technique
The most function singleness of existing screw only plays the role of fastening in the process of using, and adopts common tool just detachable, is unfavorable for protecting the safety of component.
Summary of the invention
At the shortcoming of existing fastening piece, the utility model provides a kind of novel special-purpose antitheft threaded fastener.
To achieve these goals, the measure taked of the utility model:
The antitheft threaded fastener of a kind of special use comprises screw and nut, and screw head is a cylinder tack inner pentagon screw, and interior five jiaos center is provided with a pin; Described nut is provided with major thread hole and minor thread hole;
Described screw thread scope is M3～M30;
Five interior five jiaos limits of the cylinder tack of described screw head are made up of circular arc; The beneficial effects of the utility model: simple in structure, cost is low, has anti-theft feature.
Description of drawings
Fig. 1, the utility model screw schematic representation.
Fig. 2, the utility model screw plan view.
Fig. 3, the utility model nut plan view.
Fig. 4, the utility model nut sectional view.
Embodiment
The antitheft threaded fastener of a kind of special use comprises screw and nut; Screw head is a cylinder tack inner pentagon screw, and interior five jiaos center is provided with a pin, as shown in Figure 1; Five limits of interior five jiaos are made up of circular arc, as shown in Figure 2; During knockout screw, need to adopt the corresponding coupling of pin of interior five jiaos and its center setting of special tool and screw after, just can tighten or loosening screw; Described nut is provided with major thread hole and minor thread hole, and screw thread is correspondingly determined according to different boundary dimension.Nut is the nut of different shape, and profile is multiple shape.But normally nut is ' 8 ' font by two the overlapping back of hexagon nut not of uniform size formed shapes, is best a kind of situation like this, and other shape is protected too.As shown in Figure 3, Figure 4; After need adopting the corresponding coupling of specific appearance shape of big minor thread on special tool and the nut and its composition, just can tighten or loose nut; Screw and nut are respectively by above specific structure, and the special-purpose instrument of coupling reaches antitheft effect.
Those skilled in the art's simple change and replacement all are within the protection domain of the present utility model in related domain.
Claims (2)
1. the antitheft threaded fastener of special use comprises screw and nut, it is characterized in that, described screw head is a cylinder tack inner pentagon screw, and interior five jiaos center is provided with a pin; Described nut is provided with major thread hole and minor thread hole.
2. according to the antitheft threaded fastener of the described special use of claim 1, it is characterized in that five interior five jiaos limits of the cylinder tack of described screw head are made up of circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201858387U CN201531505U (en) | 2009-07-16 | 2009-07-16 | Special theftproof thread fastening piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201858387U CN201531505U (en) | 2009-07-16 | 2009-07-16 | Special theftproof thread fastening piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531505U true CN201531505U (en) | 2010-07-21 |
Family
ID=42526909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201858387U Expired - Fee Related CN201531505U (en) | 2009-07-16 | 2009-07-16 | Special theftproof thread fastening piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531505U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915258A (en) * | 2010-08-09 | 2010-12-15 | 宁波东港紧固件制造有限公司 | Inner pentagonal screw |
-
2009
- 2009-07-16 CN CN2009201858387U patent/CN201531505U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915258A (en) * | 2010-08-09 | 2010-12-15 | 宁波东港紧固件制造有限公司 | Inner pentagonal 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: 20100721 Termination date: 20140716 |
|
| EXPY | Termination of patent right or utility model |