Safe anti-theft screw

Abstract

The utility model relates to the technical field of anti-theft screw equipment, and discloses a safe anti-theft screw which comprises a rod body, a rod tip and a rod body, the surface of the upper end of the rod tip is fixedly connected with the rod body, the surface of the outer wall of the rod body is fixedly connected with a first thread, the first thread is fixedly connected to the surface of the outer wall of the lower portion of the rod body, and a first fixing hole is formed in the middle of the rod body. The outer wall of the first fixing hole is fixedly provided with a first fixing block, the inner wall of the first fixing block is fixedly provided with a second gasket, the inner wall of the second gasket is fixedly provided with a first limiting spring rod, the outer wall of the first limiting spring rod is movably provided with a first limiting spring, and the inner wall of the first limiting spring rod is movably provided with a limiting block. The inner diameter of the limiting block is the same as that of the first fixing hole, and the limiting block is attached to the first fixing hole. The device is simple in structure and convenient to operate, and has good practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-theft screw devices, and particularly relates to a screw with safety anti-theft function. Background Art

[0002] A screw is a tool that uses the physical and mathematical principles of the inclined plane circular rotation and friction of an object to gradually fasten the machine parts of an object. A screw is a general term for fasteners, which is an everyday oral term. Screws are indispensable industrial necessities in daily life: such as extremely small screws used in cameras, glasses, watches, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; for engineering, construction, and bridges, large screws and nuts are used; for transportation tools, airplanes, trams, cars, etc., large and small screws are used together. Screws play an important role in industry. As long as there is industry on the earth, the function of screws is far more important. Screws are a common invention in people's production and life for thousands of years. From the perspective of application fields, it is one of the great inventions of mankind. Currently, during disassembly and assembly, these relatively special tools are only slightly fewer than ordinary tools, but they are still easily obtainable and can be purchased at hardware tool stores and e-commerce platforms such as Taobao, Tmall, and JD.com, and they are inexpensive, reducing the anti-theft performance of the screws. The screws are easily disassembled, easily causing property losses and having low safety performance.

[0003] The application number is 201910510956.9, which discloses a disposable anti-theft screw, including a screw main body and an anti-theft component. The screw main body includes a screw rod, a screw head, and a head groove. The top of the screw rod is provided with a screw head. The top of the screw head is recessed inward to form a head groove. The top of the screw head is provided with an anti-theft component. The anti-theft component includes a tightening part, a connecting part, and an anti-theft plug. The cross-sectional shape of the tightening part is a regular hexagon. The bottom of the tightening part is provided with a plurality of connecting parts. The inside of the connecting part is provided with an anti-theft plug. The anti-theft plug is fixedly connected to the bottom of the groove. The present invention can disconnect the connection between the connecting part and the screw head, so that the screw head has no force point and cannot be unscrewed, and can fix the plug firmly in the head groove, restricting tools such as screwdrivers and wrenches from inserting into the head groove, improving the anti-theft performance of the screw, which is safe and reliable.

[0004] The above-mentioned document discloses the following defects of a disposable anti-theft screw: During the use of this disposable anti-theft screw, it can well fix the objects. However, when the rainwater in the external environment corrodes the screw and causes the screw head to corrode and break, or when it is necessary to repair the fixed object, it is not convenient to disassemble this disposable anti-theft screw.

[0005] It can be seen from this that the existing disposable anti-theft screw does not have the characteristics of protecting the screw and being inconvenient to disassemble, and it is necessary to improve the existing device to provide a screw with safety anti-theft function. Content of the Utility Model

[0006] To solve the above technical problems, the present utility model is achieved through the following technical solutions:

[0007] The present utility model relates to a screw for security and anti-theft, including a shank and a tip. The upper surface of the tip is fixedly connected to the shank. The outer wall surface of the shank is fixedly connected with a first thread, and the first thread is fixedly connected to the outer wall surface of the lower part of the shank. There is a first fixing hole in the middle part of the shank. A first fixing block is fixedly installed on the outer wall of the first fixing hole. A second gasket is fixedly installed on the inner wall of the first fixing block. A first limiting spring rod is fixedly installed on the inner wall of the second gasket. A first limiting spring is movably installed on the outer wall of the first limiting spring rod. A limiting block is movably installed on the inner wall of the first limiting spring rod. The inner diameter of the limiting block is the same as that of the first fixing hole, and the limiting block fits with the first fixing hole.

[0008] Furthermore, a screw head is fixedly installed on the upper surface of the shank. There is a thread groove at the central axis of the screw head. There is a second fixing hole inside the screw head. A second fixing block is fixedly installed at the front end of the second fixing hole. A second limiting spring rod is fixedly installed on the inner wall of the second fixing block. A limiting spring is movably installed on the outer wall of the second limiting spring rod.

[0009] Furthermore, there are upper fixing holes on the body of the screw head, and the number of the upper fixing holes is two, which are respectively installed at the left and right ends of the screw head.

[0010] Furthermore, a main fixing rod is fixedly installed inside the thread groove. There is a second thread at the upper end of the outer wall of the main fixing rod, and the second thread is used in a matching manner with the thread groove. A cross knob groove is fixedly installed on the top surface of the main fixing rod.

[0011] Furthermore, a secondary fixing rod is fixedly installed inside the upper fixing hole. The rod diameter of the secondary fixing rod is the same as that of the upper fixing hole, and the number of the secondary fixing rods is two, which are respectively installed at the left and right ends of the protective cap.

[0012] Furthermore, a protective cap is fixedly installed on the top surface of the secondary fixing rod. An anti-theft cap is fixedly installed on the bottom surface of the protective cap. A first gasket is fixedly installed inside the anti-theft cap.

[0013] Furthermore, a first gasket is fixedly installed on the bottom surface of the protective cap. A cross knob stopper is fixedly installed at the central axis of the first gasket, and the cross knob stopper is used in a matching manner with the cross knob groove.

[0014] The present utility model has the following beneficial effects:

[0015] (1) By installing an anti-theft cap and a protective cap on the screw head, the utility model can effectively protect the screw and prevent theft, avoiding corrosion of the screw caused by corrosive substances generated due to changes in the external environment or rainwater.

[0016] (2) By installing a cross knob stopper on the protective cap, the utility model can effectively protect the cross knob groove and prevent theft effectively.

[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a front elevation view of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model placed horizontally in the front elevation;

[0021] Figure 3 It is a schematic cross-sectional view of the fixing structure of the anti-theft cap of the utility model;

[0022] Figure 4 It is a schematic cross-sectional view of the overall horizontal section of the utility model;

[0023] Figure 5 It is a schematic diagram of the screw head of the utility model;

[0024] Figure 6 It is a schematic cross-sectional view of the anti-theft cap of the overall structure of the utility model;

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] In the figure: 1. Rod tip; 101. Rod body; 102. First thread; 103. First fixing block; 104. First fixing hole; 2. Screw head; 201. Anti-theft cap; 202. Protection cap; 203. Upper fixing hole; 204. Second limit spring rod; 205. Limit spring; 206. Second fixing hole; 207. Second fixing block; 208. Secondary fixing rod; 209. Cross knob groove; 210. Main fixing rod; 211. Cross knob stopper; 212. First gasket; 3. Second thread; 301. Thread groove; 4. First limit spring rod; 401. Second gasket; 402. First limit spring; 403. Limit block. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1 - Figure 6 As shown, the present invention is a kind of screw for safety and anti-theft, including a rod tip 1 and a rod body 101. The upper end surface of the rod tip 1 is fixedly connected to the rod body 101. The outer wall surface of the rod body 101 is fixedly connected to a first thread 102. The first thread 102 is fixedly connected to the outer wall surface of the lower part of the rod body 101. There is a first fixing hole 104 in the middle part of the rod body 101. A first fixing block 103 is fixedly installed on the outer wall of the first fixing hole 104. A second gasket 401 is fixedly installed on the inner wall of the first fixing block 103. A first limit spring rod 4 is fixedly installed on the inner wall of the second gasket 401. A first limit spring 402 is movably installed on the outer wall of the first limit spring rod 4. A limit block 403 is movably installed on the inner wall of the first limit spring rod 4. The inner diameter of the limit block 403 is the same as the inner diameter of the first fixing hole 104, and the limit block 403 is in mutual fit with the first fixing hole 104.

[0029] The screw head 2 is fixedly installed on the upper end surface of the rod body 101. There is a thread groove 301 at the middle axis of the screw head 2. There is a second fixing hole 206 inside the screw head 2. A second fixing block 207 is fixedly installed at the front end of the second fixing hole 206. A second limit spring rod 204 is fixedly installed on the inner wall of the second fixing block 207. A limit spring 205 is movably installed on the outer wall of the second limit spring rod 204.

[0030] There are upper fixing holes 203 on the body of the screw head 2, and the number of the upper fixing holes 203 is two, which are respectively installed at the left and right ends of the screw head 2.

[0031] The main fixing rod 210 is fixedly installed inside the threaded groove 301. There is a second thread 3 at the upper end of the outer wall of the main fixing rod 210. The second thread 3 is used in cooperation with the threaded groove 301. The top surface of the main fixing rod 210 is fixedly installed with a cross knob groove 209.

[0032] The secondary fixing rod 208 is fixedly installed inside the fixing hole 203. The rod diameter of the secondary fixing rod 208 is the same as that of the upper fixing hole 203. The number of the secondary fixing rods 208 is two, which are respectively installed at the left and right ends of the protective cap 202.

[0033] The protective cap 202 is fixedly installed on the top surface of the fixing rod 208. The anti-theft cap 201 is fixedly installed on the bottom surface of the protective cap 202. The first gasket 212 is fixedly installed inside the anti-theft cap 201.

[0034] The first gasket 212 is fixedly installed on the bottom surface of the protective cap 202. The cross knob stopper 211 is fixedly installed at the center of the axis of the first gasket 212. The cross knob stopper 211 is used in cooperation with the cross knob groove 209.

[0035] During use, first, the end of a tool with a specified specification is engaged with the cross knob groove 209 on the main fixing rod 210 and rotated to align the second thread 3 on the main fixing rod 210 with the threaded groove 301 on the screw head 2. At the same time, the anti-theft cap 201 and the protective cap 202 are fixedly installed. Then, the secondary fixing rod 208 is inserted into the upper fixing hole 203 on the screw head 2. At the same time, the cross knob stopper 211 on the protective cap 202 coincides with the threaded groove 301.

[0036] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can understand and utilize the present utility model well. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A screw for security and anti-theft, comprising a rod body and a rod tip (1) and (101), characterized in that: The upper end surface of the rod tip (1) is fixedly connected to the rod body (101). The outer wall surface of the rod body (101) is fixedly connected to a first thread (102). The first thread (102) is fixedly connected to the outer wall surface of the lower part of the rod body (101). There is a first fixing hole (104) in the middle part of the rod body (101). A first fixing block (103) is fixedly installed on the outer wall of the first fixing hole (104). A second gasket (401) is fixedly installed on the inner wall of the first fixing block (103). A first limiting spring rod (4) is fixedly installed on the inner wall of the second gasket (401). A first limiting spring (402) is movably installed on the outer wall of the first limiting spring rod (4). A limiting block (403) is movably installed on the inner wall of the first limiting spring rod (4). The inner diameter of the limiting block (403) is the same as the inner diameter of the first fixing hole (104). The limiting block (403) is in mutual fit with the first fixing hole (104).

2. The security anti-theft screw according to claim 1, wherein: A screw head (2) is fixedly installed on the upper end surface of the rod body (101). There is a thread groove (301) at the middle axis of the screw head (2). There is a second fixing hole (206) inside the screw head (2). A second fixing block (207) is fixedly installed at the front end of the second fixing hole (206). A second limiting spring rod (204) is fixedly installed on the inner wall of the second fixing block (207). A limiting spring (205) is movably installed on the outer wall of the second limiting spring rod (204).

3. The security anti-theft screw according to claim 2, wherein: There are upper fixing holes (203) on the body of the screw head (2). The number of the upper fixing holes (203) is two, which are respectively installed at the left and right ends of the screw head (2).

4. A screw for security and anti-theft according to claim 2, characterized in that: A main fixing rod (210) is fixedly installed inside the thread groove (301). There is a second thread (3) at the upper end of the outer wall of the main fixing rod (210). The second thread (3) is used in cooperation with the thread groove (301). A cross knob groove (209) is fixedly installed on the top surface of the main fixing rod (210).

5. The security anti-theft screw according to claim 3, wherein: A secondary fixing rod (208) is fixedly installed inside the upper fixing hole (203). The rod diameter of the secondary fixing rod (208) is the same as the rod diameter of the upper fixing hole (203). The number of the secondary fixing rods (208) is two, which are respectively installed at the left and right ends of the protective cap (202).

6. The security anti-theft screw according to claim 5, characterized in that: A protective cap (202) is fixedly installed on the top surface of the secondary fixing rod (208). An anti-theft cap (201) is fixedly installed on the bottom surface of the protective cap (202). A first gasket (212) is fixedly installed inside the anti-theft cap (201).

7. A screw for security and anti-theft according to claim 6, characterized in that: A first gasket (212) is fixedly installed on the bottom surface of the protective cap (202). A cross knob stopper (211) is fixedly installed at the axis of the first gasket (212). The cross knob stopper (211) is used in cooperation with the cross knob groove (209).

Images