CN2688961Y - eccentric anti-theft screw and special screwdriver - Google Patents
eccentric anti-theft screw and special screwdriver Download PDFInfo
- Publication number
- CN2688961Y CN2688961Y CN 200420026094 CN200420026094U CN2688961Y CN 2688961 Y CN2688961 Y CN 2688961Y CN 200420026094 CN200420026094 CN 200420026094 CN 200420026094 U CN200420026094 U CN 200420026094U CN 2688961 Y CN2688961 Y CN 2688961Y
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- CN
- China
- Prior art keywords
- screw
- eccentric
- theft
- radius
- shaft
- 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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- 239000011148 porous material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The utility model relates to a structural improvement of screw still relates to the special utensil of turning round of this screw simultaneously, belongs to fastener and hardware and tools technical field. The improvement of the screw is that the head of the screw is provided with a stepped hole with a large outside and a small inside, the outer hole is coaxial with the screw rod, the inner hole is eccentric with the screw rod, and the radius of the outer hole is more than or equal to the sum of the radius of the inner hole and the eccentricity. The front end of the rod body of the special screwdriver of the eccentric anti-theft screw is made into a stepped shaft with a small front and a large back, the large-diameter shaft is coaxial with the rod body, the small-diameter shaft is eccentric with the rod body, and the radius of the large-diameter shaft is larger than or equal to the sum of the radius of the small-diameter shaft and the eccentric distance. The utility model discloses an eccentric antitheft screw and special utensil of turning round thereof simple structure, small and exquisite, it is convenient to make, also can use under less size space environment. The basic outline of the head of the screw is made into a shape of a semi-sphere, a cone frustum or an inverted cone frustum, the screw cannot be easily disassembled by using a general tool, and the anti-theft screw is very suitable for anti-theft fastening of important equipment, public places and field facilities.
Description
Technical field
The utility model relates to a kind of screw, especially a kind of architecture advances of screw, and the utility model also relates to the special rotating tool of this screw simultaneously, belongs to fastening piece and hardware ﹠ tools technical field.
Background technique
As everyone knows, the screw head end that is used for being fastenedly connected between the component has straight groove or cross recess, need install and remove by the tool that revolves of bottle opener (claiming screw cutter, screwdriver again) and so on.But, in many cases, require screw to screw and must not arbitrarily dismantle without approval afterwards.For this reason, the someone has developed the special type screw that is equipped with special attachment, and these screws need be used the special tool dismounting, therefore can prevent random dismounting.Yet, this screw itself and special tool complex structure thereof, spatial structure is big, and making, carry and using has inconvenience more, sometimes, even uses general utility tool (as cutting pliers etc.) to unscrew screw by the clamp screws head, has lost the arbitrarily effect of dismounting that prevents.
Summary of the invention
The purpose of this utility model is: at the defective that above existing screw exists, propose a kind ofly can prevent random dismounting and eccentric anti-theft screw simple in structure, give supporting with it special rotating tool simultaneously.
In order to reach above purpose, eccentric anti-theft screw of the present utility model is made of threaded screw rod and screw head, its improvements are, described screw head be shaped on outer big in little shoulder hole, the outer hole and the screw coaxial of described shoulder hole, hole and screw rod off-centre in the described shoulder hole, the radius in described outer hole is more than or equal to interior pore radius and throw of eccentric sum.
The utility model further improves, in order to have better anti-theft effect, after screw is installed, screw head is not within institute's fixture gabarit, the corresponding rounding frustum shape of making sunk screw of screw head is if screw head need expose institute's fixture gabarit, corresponding semi-round ball shape or the truncated cone shape of making elementary contour such as round head bolt of screw head, like this, then can not unscrew screw by the clamp screws head with general utility tool (as cutting pliers).
This eccentric anti-theft screw special rotating tool is made of lever and shaft, described shaft front end is made pre-small post-large multidiameter shaft, described big footpath axle is coaxial with shaft, described path axle and shaft off-centre, and the radius of described big footpath axle is more than or equal to path axle radius and throw of eccentric sum.
Obviously, eccentric anti-theft screw of the present utility model and special rotating tool thereof are simple in structure, small and exquisite, easily manufactured, under the reduced size space environment, also can use, eccentric anti-theft screw can be tightened as plain screw with special rotating tool, and prevent random dismounting, very be suitable for the antitheft fastening usefulness of visual plant and public arena and field facility.
Description of drawings
Fig. 1 is an embodiment's of the utility model a structural representation.
Fig. 2 is Fig. 1 embodiment's a special rotating tool structural representation.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Embodiment one: the eccentric anti-theft screw of present embodiment is made of threaded screw rod 1 and the screw head 2 that general screw had as shown in Figure 1.Screw head 2 have outer big in little shoulder hole, outer end macropore 4 is coaxial with screw rod 1, inner end aperture 3 is axially eccentric with screw rod 1, the radius R of outer end macropore 4 adds the eccentric distance e sum of aperture 3 and screw rod 1 greater than the radius r of inner end aperture 3.
Screw head 2 gabarit elementary contours are made the semi-round ball shape, also can make circular cone or rounding frustum shape.
During fastening the and dismounting of the utility model, use and the matching used special rotating tool of described screw, as shown in Figure 2, this special rotating tool has and the corresponding eccentric stepped shaft structure of described screw, has pre-small post-large ladder pillow block, the little axle of front end 1 with revolve concrete 3 axially eccentric, rear end macro-axis 2 with revolve concrete 3 coaxial, the eccentric distance e sum that the radius R of rear end macro-axis 2 adds the little axle 1 of front end and revolves tool 3 greater than the radius r of the little axle 1 of front end.During use, the special rotating tool multidiameter shaft partly stretches in the ladder circular hole of screw head correspondence, rotates fastening or dismounting screw, and other people then can not use any general utility tool to twist screw easily, has therefore played good security insurance effect.
In addition to the implementation, the utility model can also have other mode of executions.For example, the cross section of shoulder hole and multidiameter shaft also can be a regular polygon except being the circle of using always; Shoulder hole and multidiameter shaft also can be the tapers with certain taper except being the cylindricality of using always; Or the like.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all belong to the protection domain of the utility model requirement.
Claims (9)
1. eccentric anti-theft screw, constitute by threaded screw rod and screw head, it is characterized in that: described screw head be shaped on outer big in little shoulder hole, described outer hole and screw coaxial, hole and screw rod off-centre in described, the radius in described outer hole is more than or equal to interior pore radius and throw of eccentric sum.
2, eccentric anti-theft screw according to claim 1 is characterized in that: the cross section of described shoulder hole is a regular polygon.
3, eccentric anti-theft screw according to claim 1 is characterized in that: described shoulder hole is a taper hole.
4, according to claim 1,2 or 3 described eccentric anti-theft screws, it is characterized in that: described screw head gabarit is the semi-round ball shape.
5, according to claim 1,2 or 3 described eccentric anti-theft screws, it is characterized in that: described screw head gabarit is a truncated cone shape.
6, according to claim 1,2 or 3 described eccentric anti-theft screws, it is characterized in that: described screw head gabarit is a rounding frustum shape.
7. eccentric anti-theft screw special rotating tool, be made of lever and shaft, it is characterized in that: described shaft front end is made pre-small post-large multidiameter shaft, and described big footpath axle is coaxial with shaft, described path axle and shaft off-centre, the radius of described big footpath axle is more than or equal to path axle radius and throw of eccentric sum.
8, eccentric anti-theft screw special rotating tool according to claim 7, it is characterized in that: the cross section of described multidiameter shaft is a regular polygon.
9, according to claim 7 or 8 described eccentric anti-theft screw special rotating tools, it is characterized in that: described multidiameter shaft is the axis of cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026094 CN2688961Y (en) | 2004-04-08 | 2004-04-08 | eccentric anti-theft screw and special screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026094 CN2688961Y (en) | 2004-04-08 | 2004-04-08 | eccentric anti-theft screw and special screwdriver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2688961Y true CN2688961Y (en) | 2005-03-30 |
Family
ID=34670075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420026094 Expired - Fee Related CN2688961Y (en) | 2004-04-08 | 2004-04-08 | eccentric anti-theft screw and special screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2688961Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014173360A1 (en) * | 2013-08-28 | 2014-10-30 | 中兴通讯股份有限公司 | Anti-theft screw and wrench |
| CN104439035A (en) * | 2014-12-11 | 2015-03-25 | 中国航空工业标准件制造有限责任公司 | Fillet cold-rolling auxiliary tool for eccentric key head bolts |
-
2004
- 2004-04-08 CN CN 200420026094 patent/CN2688961Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014173360A1 (en) * | 2013-08-28 | 2014-10-30 | 中兴通讯股份有限公司 | Anti-theft screw and wrench |
| CN104439035A (en) * | 2014-12-11 | 2015-03-25 | 中国航空工业标准件制造有限责任公司 | Fillet cold-rolling auxiliary tool for eccentric key head bolts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |