CN202140413U - Anti-theft screw - Google Patents
Anti-theft screw Download PDFInfo
- Publication number
- CN202140413U CN202140413U CN201120260697U CN201120260697U CN202140413U CN 202140413 U CN202140413 U CN 202140413U CN 201120260697 U CN201120260697 U CN 201120260697U CN 201120260697 U CN201120260697 U CN 201120260697U CN 202140413 U CN202140413 U CN 202140413U
- Authority
- CN
- China
- Prior art keywords
- thread section
- expansion nut
- diameter
- straight portion
- screw
- 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
Links
Images
Landscapes
- Dowels (AREA)
Abstract
The utility model discloses an anti-theft screw, which is composed of a cone portion, a straight portion, a fastening thread section and an expansion nut. One end of the straight portion is connected with the cone portion, the other end of the straight portion is connected with one end of the fastening thread section, and the other end of the fastening thread section is connected with the expansion nut. The diameter of the fastening thread section is smaller than that of the straight portion. When the expansion nut is not expanded, the diameter of the expansion nut is smaller than that of the fastening thread section, and when the expansion nut is expanded, the diameter of the expansion nut is larger than that of the fastening thread section. The anti-theft screw has the advantages that when the expansion nut is expanded, the fastening thread section is blocked, thereby preventing the screw from being screwed out and being reliable in prevention of burglary.
Description
Technical field
The utility model relates to a kind of screw, is specifically related to a kind of anti-theft screw.
Background technique
The structure that instruments such as the head of a nail employing of general screw and screw-driver are complementary can be tripped out by any turn of instrument, thereby not have the function of antitheft.Even use the non-standard screw nail, also tripped out by the self-made tool turn easily, can not realize the effect of guarding against theft.
Summary of the invention
To the problem in the background technique; The purpose of the utility model is to provide a kind of screw of guarding against theft; Its structure is: it by tapering, straight portion, chase after tight thread section and expansion nut is formed; One end of straight portion is connected with the tapering, and the other end of straight portion is connected with an end that chases after tight thread section, and the other end that chases after tight thread section is connected with expansion nut; Chase after tight thread section diameter less than straight portion diameter; When expansion nut did not expand, the expansion nut diameter was less than chasing after tight thread section diameter; When expansion nut expanded, the expansion nut diameter was greater than chasing after tight thread section diameter.
The beneficial effect of the utility model is: after screw gets into the object appropriate depth, with instrument expansion nut is expanded, will chase after tight thread section and cover, prevent that screw from being tripped out by the instrument turn, realizes reliable anti-theft effect.
Description of drawings
Fig. 1 is expansion cap anti-theft screw structural drawing when not expanding;
Anti-theft screw structural drawing when Fig. 2 is the expansion cap expansion.
Among the figure: expansion nut 1, chase after tight thread section 2, straight portion 3 and tapering 4.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.
As shown in Figure 1, the utility model by tapering 4, straight portion 3, chase after tight thread section 2 and expansion nut 1 is formed, straight portion 3 lower ends are connected with tapering 4, directly portion 3 upper ends with chase after tight thread section 2 lower ends and be connected, chase after tight thread section 2 upper ends and be connected with expansion nut 1; Chase after tight thread section 2 diameters less than straight portion 3 diameters; When expansion nut 1 did not expand, expansion nut 1 diameter was less than chasing after tight thread section 2 diameters; When expansion nut 1 expanded, expansion nut 1 diameter was greater than chasing after tight thread section 2 diameters (as shown in Figure 2).
During use, at first bore an aperture, aperture is put in tapering 4 at body surface; Then, screwdriver kit is rotated in the forward cover and clings to tight thread section 2 on one's trail, and screw is screwed in the object; When treating that screw gets into the object appropriate depth; Screw-driver is taken out in counterrotating, with expansion cone expansion nut 1 is expanded, and expansion nut 1 diameter of this moment is greater than chasing after tight thread section 2 diameters; Expansion nut 1 covers and firmly chases after tight thread section 2; Screwdriver kit can't use, and screw just can't be tripped out, and reaches reliable anti-theft effect.
Claims (1)
1. anti-theft screw; It is characterized in that: it by tapering (4), straight portion (3), chase after tight thread section (2) and expansion nut (1) is formed; One end of straight portion (3) is connected with tapering (4); The other end of straight portion (3) is connected with an end that chases after tight thread section (2), and the other end that chases after tight thread section (2) is connected with expansion nut (1); Chase after tight thread section (2) diameter less than straight portion (3) diameter; Expansion nut (1) is not when expanding, and expansion nut (1) diameter is less than chasing after tight thread section (2) diameter; When expansion nut (1) expanded, expansion nut (1) diameter was greater than chasing after tight thread section (2) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120260697U CN202140413U (en) | 2011-07-22 | 2011-07-22 | Anti-theft screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120260697U CN202140413U (en) | 2011-07-22 | 2011-07-22 | Anti-theft screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202140413U true CN202140413U (en) | 2012-02-08 |
Family
ID=45551471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120260697U Expired - Fee Related CN202140413U (en) | 2011-07-22 | 2011-07-22 | Anti-theft screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202140413U (en) |
-
2011
- 2011-07-22 CN CN201120260697U patent/CN202140413U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2781763A1 (en) | Self-drilling bolt and nut assembly | |
| US3292463A (en) | Wrench adapter | |
| CN202140413U (en) | Anti-theft screw | |
| WO2008152148A3 (en) | Improved anchor nut made of fiber-reinforced plastic | |
| CN204025297U (en) | A kind of anti-theft lock nut | |
| JP3211679U (en) | Expansion anchor | |
| CN204893779U (en) | Two -way ratchet spanner | |
| CN203488524U (en) | Nut | |
| CN203051366U (en) | Fastening screw | |
| CN203495835U (en) | Novel screwdriver with sharp edges | |
| CN203272393U (en) | Looseness prevention screw | |
| CN202326622U (en) | Fastener | |
| CN201874964U (en) | Anti-theft screw | |
| CN206329614U (en) | A kind of anti-theft screw | |
| CN105987065A (en) | Antitheft bolt | |
| US20140064872A1 (en) | Replaceable Anchor | |
| CN213575049U (en) | Anti-loosening combined screw | |
| US20120272507A1 (en) | Anchors for holding a wire shelf | |
| CN201851479U (en) | Theftproof screw with V-shaped reed | |
| CN202545530U (en) | Anti-theft round head bolt | |
| CN204591958U (en) | A kind of anti-theft bolt | |
| CN203412877U (en) | Expansion bolt | |
| CN202556294U (en) | Multifunctional wrench | |
| CN202612332U (en) | Nut and wrench thereof | |
| CN201963670U (en) | Novel expansion bolt |
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: 20120208 Termination date: 20120722 |