Anti-theft screw

A screw and screw head technology, applied in nuts, bolts, threaded fasteners, etc., can solve problems such as high cost, inconvenient use, and complex structure

Inactive Publication Date: 2003-05-14
唐柳
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Screws are the most commonly used mechanical fasteners. In the occasions where objects to be fixed (such as car license plates, etc.) need to be prevented from being stolen and lost, ordinary screws cannot meet the requirements. For this reason, people have invented a variety of anti-theft screws, but they all have complex structures. , so the problem of high cost, some anti-theft screws also need to use special tools, which is inconvenient to use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-theft screw
  • Anti-theft screw
  • Anti-theft screw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The anti-theft screw shown in the accompanying drawings is screwed in clockwise, and it includes a screw rod 1, a hemispherical screw head 2, and on the hemispherical screw head 2, it is used to insert a slot 3 of a straight screwdriver. It is characterized in that, in figure 2 The upper half of the left side of the slot shown and the lower half of the right side are two stressed parts respectively an inclined plane or an arc 4, 5. When the slotted screwdriver rotates counterclockwise, the inclined plane or arc 4,5 make the torque of the screwdriver to unscrew the screw lack the action point, and make the screwdriver withdraw from the slot 3 along the inclined plane or the arc surface 4,5. When the screwdriver rotates in the clockwise direction, since the above-mentioned two inclined surfaces or arc surface parts 4, 5 are not stressed, the screw screwing in is not affected. The anti-theft screw adopts a hemispherical screw head 2, which makes it difficult to unscrew th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to an anti-theft screw capable of being screwed in and incapable of being screwed out, which includes screw bolt, and round screw head. The slot in the screw head is so shaped, that the screw can be screwed in with a common screw driver and the screw can not be screwed out with one with one screw driver owing to the slant or arced surface in the screwing out direction and no force applying points.

Description

technical field [0001] The invention belongs to a screw, in particular to a screw which can only be rotated but cannot be unscrewed, and thus can be used for anti-theft. Background technique [0002] Screws are the most commonly used mechanical fasteners. When it is necessary to prevent objects to be fixed (such as license plates, etc.) , so the problem of high cost, some anti-theft screws also need to use special tools, which is inconvenient to use. Contents of the invention [0003] The object of the present invention is to provide an anti-theft screw with simple structure, good anti-theft effect, low cost and easy to use. [0004] The object of the present invention is achieved like this, anti-theft screw comprises screw rod, screw head, is used to insert the inline groove of inline screwdriver on the screw head, it is characterized in that, when inline screwdriver rotates by unscrew screw direction, described a The stressed parts on both sides of the word groove are ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F16B41/00
Inventor 唐柳
Owner 唐柳
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap