CN202165380U - Anti-theft screw with locking gasket - Google Patents
Anti-theft screw with locking gasket Download PDFInfo
- Publication number
- CN202165380U CN202165380U CN2011202735485U CN201120273548U CN202165380U CN 202165380 U CN202165380 U CN 202165380U CN 2011202735485 U CN2011202735485 U CN 2011202735485U CN 201120273548 U CN201120273548 U CN 201120273548U CN 202165380 U CN202165380 U CN 202165380U
- Authority
- CN
- China
- Prior art keywords
- screw
- nail
- head
- lock washer
- screw cap
- 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 provides an anti-theft screw, which comprises a screw cap and a screw rod fixed with the screw cap. A rotating groove is arranged on the end face of the screw cap. The anti-theft screw is characterized by further comprising a locking gasket which is in a conical structure and matched with the shape of the screw cap. A through hole matched with the shape of the screw rod is arranged in the middle of the locking gasket, and the locking gasket is arranged on the screw rod in sleeving mode and attached to the screw cap. The circumferential edge of the locking gasket is further provided with a plurality of tooth-shaped protrusions. The rotating groove is a cylindrical blind hole, a plurality of symmetrically arranged semi-circular grooves are arranged on the inner wall of the blind hole, and one ends of the grooves extend out of the screw cap. When the crew rod on the screw is rotated to the end of an installation hole, the tooth-shaped protrusions on the end face of the screw cap are clung to a fastened member, at the moment, the tooth-shaped protrusions can increase friction force between the screw cap and the fastened member and further prevent the screw from being excessively rotated under external force. The rotating groove has a special structure and needs an adapted tool for opening, thereby having an anti-theft function.
Description
Technical field
The utility model relates to a kind of screw, especially a kind of anti-theft screw that has lock washer.
Background technique
It is very extensive that screw uses in people's life, and it comprises the head of a nail and screw rod, and head of a nail end face is provided with the turn groove, and the turn groove is generally " one " word or " ten " word or interior hexagon etc.When screw is used for the fixing of some special valuable devices and organizes,, then be easy to through opening, thereby cause valuable components from being damaged or stolen with the corresponding screw-driver of turn groove shape if there have the people that this valuable device is felt to be agaainst the law.In addition; In the time of in the mounting hole of screw on fastener, because contacting between the head of a nail and fastener is smooth surface contact, therefore occurring screw threads easily turns over a situation; Thereby make that screw rod continues rotation in mounting hole on the screw; And then the internal thread in the destruction mounting hole, will cause screw not to be threaded with mounting hole well thus, even the in use loosening and problem such as come off of screw occur.
Summary of the invention
In order to overcome the deficiency of existing technology, the utility model provides a kind of ability antitheft and has prevented to screw the excessive anti-theft screw that has lock washer.
The utility model solves the technological scheme that its technical problem adopted: a kind of anti-theft screw that has lock washer; The screw rod that includes the head of a nail and fix with the head of a nail; Head of a nail end face is provided with the turn groove, it is characterized in that: also include lock washer, this lock washer is a cone structure and suitable with head of a nail shape; The lock washer middle part offers and the suitable through hole of screw rod shape; Lock washer be sheathed on the screw rod and with the head of a nail setting that reclines mutually, also offer a plurality of detent projection on the periphery of lock washer, said turn groove is columned blind hole; Offer a plurality of symmetrically arranged semi-circular recesses on the inwall of this blind hole, an end of this groove extends to outside the head of a nail.
Further being set to of the utility model: said detent projection has ten at least.
Further being set to of the utility model: the said head of a nail is shaped as cone structure, and the little cephalic par of the head of a nail is fixedly connected with screw rod.
The beneficial effect of the utility model is: when screw rod on the screw rotates in mounting hole; Detent projection on the head of a nail end face will be close on the fastener; Detent projection will increase the frictional force between the head of a nail and fastener this moment; Thereby can prevent that screw from occurring in the stubborn excessive situation of external force underspin, avoided the destruction of screw rod to the mounting hole internal thread thus.The lock washer here can be wholely set with screw, also can be fixing through welding, and if have bigger frictional force between screw and lock washer, then can also not adopt other modes to fix between lock washer and screw.In addition, the structure of turn groove is to offer groove on the blind hole perisporium on the head of a nail, and such structure does not have the conventional screw-driver can be adaptive, if open screw, then needs special instrument to open, thereby has played the effect of antitheft.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is the utility model embodiment's a partial sectional view.
Fig. 2 is the utility model embodiment's a side view.
Fig. 3 is the plan view of the utility model embodiment lock washer.
Fig. 4 is the A-A sectional view of Fig. 3.
Embodiment
Like Fig. 1,2,3, shown in 4; Present embodiment include the head of a nail 1, with fixing screw rod 2 and the lock washer 3 of the head of a nail 1; The head of a nail 1 is shaped as cone structure, and the little cephalic par of the head of a nail 1 is fixedly connected with screw rod 2, and the head of a nail 1 end face is provided with turn groove 11; This lock washer 3 is a cone structure and suitable with the head of a nail 1 shape; Lock washer 3 middle parts offer and the suitable through hole 31 of screw rod 2 shapes, lock washer 3 be sheathed on the screw rod 2 and with the head of a nail 1 setting that reclines mutually, also convex with ten detent projection 32 on the periphery of lock washer 3.Wherein, Turn groove 11 is columned blind hole 111, offers a plurality of symmetrically arranged semi-circular recesses 112 on the inwall of this blind hole 111, and an end of this groove 112 extends to the head of a nail 1 outside; Thus; The shape of turn groove 11 also have only the correct instrument of selection could insert turn groove 11 and open screw, and this instrument need be joined in addition as the flower of opening.In addition, the quantity of detent projection 32 can be more, are not restricted to ten.
In the utility model; When screw rod on the screw 2 rotates in mounting hole; Detent projection 32 on the head of a nail 1 end face will be close on the fastener; Detent projection 32 will increase the frictional force between the head of a nail 1 and fastener this moment, thereby can prevent that screw from occurring in the stubborn excessive situation of external force underspin, avoided the destruction of 2 pairs of mounting hole internal threads of screw rod thus.The lock washer 3 here can be wholely set with screw, also can be fixing through welding, and if 3 of screw and lock washers have bigger frictional force, then can also not adopt other modes to fix between lock washer 3 and screw.In addition, the structure of turn groove 11 is to offer groove 112 on blind hole 111 perisporiums on the head of a nail 1, and such structure does not have the conventional screw-driver can be adaptive, if open screw, then needs special instrument to open, thereby has played the effect of antitheft.The utility model can also have other mode of executions, and the technological scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of the utility model requirement protection.
Claims (3)
1. anti-theft screw that has lock washer, include the head of a nail and with the fixing screw rod of the head of a nail, head of a nail end face is provided with the turn groove; It is characterized in that: also include lock washer; This lock washer is a cone structure and suitable with head of a nail shape, and lock washer middle part offers and the suitable through hole of screw rod shape, lock washer be sheathed on the screw rod and with the head of a nail setting that reclines mutually; Also offer a plurality of detent projection on the periphery of lock washer; Said turn groove is columned blind hole, offers a plurality of symmetrically arranged semi-circular recesses on the inwall of this blind hole, and an end of this groove extends to outside the head of a nail.
2. the anti-theft screw that has lock washer according to claim 1 is characterized in that: said detent projection has ten at least.
3. the anti-theft screw that has lock washer according to claim 1 is characterized in that: the said head of a nail is shaped as cone structure, and the little cephalic par of the head of a nail is fixedly connected with screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202735485U CN202165380U (en) | 2011-07-29 | 2011-07-29 | Anti-theft screw with locking gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202735485U CN202165380U (en) | 2011-07-29 | 2011-07-29 | Anti-theft screw with locking gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202165380U true CN202165380U (en) | 2012-03-14 |
Family
ID=45801208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202735485U Expired - Fee Related CN202165380U (en) | 2011-07-29 | 2011-07-29 | Anti-theft screw with locking gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202165380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806980A (en) * | 2015-04-20 | 2015-07-29 | 徐存然 | Fluorescent lamp tube clamping and connecting element |
| CN105889283A (en) * | 2016-03-10 | 2016-08-24 | 天津市福厚盈科技有限公司 | Manufacturing method for loosening-preventing screw |
-
2011
- 2011-07-29 CN CN2011202735485U patent/CN202165380U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806980A (en) * | 2015-04-20 | 2015-07-29 | 徐存然 | Fluorescent lamp tube clamping and connecting element |
| CN105889283A (en) * | 2016-03-10 | 2016-08-24 | 天津市福厚盈科技有限公司 | Manufacturing method for loosening-preventing 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: 20120314 Termination date: 20150729 |
|
| EXPY | Termination of patent right or utility model |