Inner hexagonal screw with anti-theft function

Abstract

The inner hexagonal screw with the anti-theft function comprises a stud, a bolt head, a metal inserting block, a hexagonal wrench and a hexagonal strong magnetic head, the bolt head is rotatably installed at one end of the stud, a positioning cavity is formed in the connecting end of the stud and the bolt head, one port of the positioning cavity is communicated with the outside of the stud, and the other port of the positioning cavity is communicated with the other port of the stud. A metal insertion block is elastically and slidably mounted in the positioning cavity through an extension spring; by means of the overall arrangement, in the using process, when a common hexagon wrench is used for disassembling the bolt, the bolt head can independently rotate along with the common hexagon wrench, the stud cannot rotate, the bolt head is prevented from being disassembled by the stud, and therefore the whole bolt is safer and more reliable.

Description

Technical Field

[0001] This utility model relates to the field of internal hex screws, and in particular to an internal hex screw with anti-theft function. Background Technology

[0002] A hex socket cap screw is a fastener with an internal hexagonal groove on its head. It is tightened or loosened by applying torque with an Allen wrench or torque wrench.

[0003] However, existing hex socket screws are easily disassembled during use, lack good anti-theft function, and are prone to causing unnecessary property loss.

[0004] Therefore, it is essential to invent an internal hex screw with anti-theft function. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a hexagonal screw with anti-theft function. The technical solution is as follows: a hexagonal screw with anti-theft function includes a stud, a bolt head, a metal insert, a hexagonal wrench, and a hexagonal magnetic head, wherein: a bolt head is rotatably mounted on one end of the stud, a positioning cavity is formed inside the connection end between the stud and the bolt head, one port of the positioning cavity is connected to the outside of the stud, and a metal insert is elastically and slidably mounted inside the positioning cavity by a tension spring;

[0006] The upper surface of the bolt head is provided with an internal six-hole, and the lower surface of the bolt head is provided with a corresponding insertion hole for the metal insert.

[0007] A positioning pin is fixedly installed on one side of the connection end between the stud and the bolt head;

[0008] The bolt head has a positioning notch corresponding to the positioning pin;

[0009] One end of the hexagonal wrench is fixedly equipped with a hexagonal strong magnetic head corresponding to the internal hexagonal hole;

[0010] The hexagonal strong magnetic head is magnetically connected to the metal insert.

[0011] The stud has a rotating cavity at one end with a positioning cavity. The stud is rotatably connected to the bolt head through the rotating cavity. The rotating cavity and the positioning cavity are coaxially connected. The rotating cavity is located between the positioning pin and the positioning cavity. The opening of the rotating cavity is connected to the outside of the stud.

[0012] The rotating cavity opening has an integral constriction inside, which is rotatably connected to the bolt head.

[0013] The bolt head with a socket is coaxially fixed to a rotating cylinder, and one end of the rotating cylinder is rotatably installed in a rotating cavity through a constricted opening.

[0014] An anti-detachment edge is fixedly installed on the outer side of one end of the rotating cylinder inside the rotating cavity. The anti-detachment edge is in rotatable contact with the rotating cavity and the closing opening. The diameter of the anti-detachment edge is larger than the inner diameter of the closing opening.

[0015] The bolt head is fitted with a ring sleeve, and the outer circumferential surface of the ring sleeve is provided with a positioning groove corresponding to the positioning pin and the positioning notch. The other end of the positioning pin is flush with the outer edge of the ring sleeve.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] The overall design of this utility model ensures that, during use, when disassembling the device with a regular hex wrench, the bolt head will rotate independently along with the wrench, while the stud will not rotate, preventing it from being disassembled by the stud, thus making the whole device safer and more reliable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the hexagonal strong magnetic head insertion into the internal six-hole structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the hexagonal strong magnetic head of this utility model attracting one end of the metal plug into the socket.

[0020] Figure 3 This is a schematic diagram of the stud and bolt head structure of this utility model.

[0021] Figure 4 This is a partial cross-sectional view of the stud and bolt head of this utility model.

[0022] Figure 5 This is a partially enlarged structural diagram of point A of this utility model.

[0023] Figure 6 This is a partially enlarged structural diagram of section B of this utility model.

[0024] In the picture:

[0025] 1. Stud, 2. Bolt head, 3. Positioning cavity, 4. Internal hexagonal hole, 5. Insertion hole, 6. Metal insert block, 7. Tension spring, 8. Rotating cavity, 9. Closure, 10. Positioning pin, 11. Positioning notch, 12. Ring, 13. Positioning groove, 14. Rotary cylinder, 15. Anti-detachment edge, 16. Hex wrench, 17. Hexagonal strong magnetic head. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0027] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings: Example

[0029] Reference Figure 1-6 An anti-theft hex screw includes a stud 1, a bolt head 2, a metal insert 6, a hex wrench 16, and a hexagonal magnetic head 17. The bolt head 2 is rotatably mounted on one end of the stud 1. With this structure, when disassembled using a standard hex wrench 16, the bolt head 2 rotates independently with the hex wrench 16, while the stud 1 does not rotate, thus preventing theft. A positioning cavity 3 is formed inside the connection between the stud 1 and the bolt head 2. One end of the positioning cavity 3 communicates with the outside of the stud 1. The metal insert 6 is elastically and slidably mounted inside the positioning cavity 3 via a tension spring 7. The tension spring 7 pulls and limits the metal insert 6, ensuring its stability within the positioning cavity 3 and preventing it from moving freely. When the metal insert 6 is not attracted by the magnetic force of the hexagonal magnetic head 17, the other end of the metal insert 6 moves away from the insertion hole 5 under the action of the tension spring 7, thus not affecting the rotation of the bolt head 2.

[0030] It should be noted that the end of the metal plug 6 connected to the tension spring 7 is always in the positioning cavity 3, regardless of whether it is subjected to the magnetic force of the hexagonal strong magnetic head 17.

[0031] Specifically, the upper surface of the bolt head 2 is provided with an internal hexagonal hole 4, and the lower surface of the bolt head 2 is provided with a corresponding insertion hole 5 for the metal insertion block 6, so that the metal insertion block 6 can be inserted into the insertion hole 5 by the magnetic force of the hexagonal strong magnetic head 17, so that the bolt head 2 is connected to the stud 1, forcing the bolt head 2 to be unable to rotate, and thus it can be disassembled.

[0032] Specifically, the positioning cavity 3, the insertion hole 5, and the metal insertion block 6 are all rectangular in shape;

[0033] Specifically, a positioning pin 10 is fixedly installed on one side of the connection end between the stud 1 and the bolt head 2; a positioning notch 11 corresponding to the positioning pin 10 is opened on the bolt head 2; a ring sleeve 12 is rotatably sleeved on the outside of the bolt head 2. With the setting of the ring sleeve 12, when the metal plug 6 is attracted into the plug hole 5 by a strong magnet, and the bolt head 2 is clamped and disassembled with a clamping tool (such as a snap clamp, pliers, etc.), the ring sleeve 12 will rotate with the clamping tool alone, so it is impossible to disassemble it. A positioning groove 13 corresponding to the positioning pin 10 and the positioning notch 11 is opened on the outer circumferential surface of the ring sleeve 12. The other end of the positioning pin 10 is flush with the outer edge of the ring sleeve 12.

[0034] With the positioning pin 10, positioning notch 11 and positioning groove 13 in place, when it is necessary to remove the internal hex screw with anti-theft function, the positioning notch 11 and positioning groove 13 are aligned with the positioning pin 10. At this time, the metal plug 6 and the socket 5 will be aligned. Then, the metal plug 6 can be inserted into the socket 5 by the magnetic force of the hexagonal strong magnetic head 17 to remove it.

[0035] Specifically, a hexagonal magnetic head 17 corresponding to the internal hexagonal hole 4 is fixedly installed at one end of the hexagonal wrench 16; the hexagonal magnetic head 17 is magnetically connected to the metal plug 6; the magnetic force of the hexagonal magnetic head 17 is greater than the tension of the tension spring 7, so that the metal plug 6 can be attracted to be inserted into the socket 5 by the magnetic force of the hexagonal magnetic head 17.

[0036] Specifically, the stud 1 has a rotating cavity 8 at one end with a positioning cavity 3. The stud 1 is rotatably connected to the bolt head 2 through the rotating cavity 8. The rotating cavity 8 and the positioning cavity 3 are coaxially connected. The rotating cavity 8 is located between the positioning pin 10 and the positioning cavity 3. The opening of the rotating cavity 8 is connected to the outside of the stud 1. An integral constriction 9 is provided inside the opening of the rotating cavity 8. The constriction 9 is rotatably connected to the bolt head 2. A rotating cylinder 14 is coaxially fixedly installed at one end of the bolt head 2 with a insertion hole 5. One end of the rotating cylinder 14 is rotatably installed in the rotating cavity 8 through the constriction 9. An anti-detachment edge 15 is fixedly installed on the outer side of the end of the rotating cylinder 14 installed inside the rotating cavity 8. The anti-detachment edge 15 is in rotatable contact with the rotating cavity 8 and the constriction 9. The diameter of the anti-detachment edge 15 is larger than the inner diameter of the constriction 9.

[0037] This structure ensures the stability of the stud 1 and bolt head 2 during rotation, while preventing accidental separation between them.

[0038] In this embodiment, during disassembly, the bolt head 2 and the ring 12 are rotated so that the positioning notch 11 and the positioning groove 13 align with the positioning pin 10. At this time, the metal insert 6 and the insertion hole 5 will align. Then, the hexagonal strong magnetic head 17 at one end of the hex wrench 16 is inserted into the internal hexagonal hole 4. Under the action of magnetic force, the metal insert 6 is attracted to insert into the insertion hole 5. At this time, the bolt head 2 and the stud 1 are locked together under the action of the metal insert 6. Thus, when the hex wrench 16 is rotated, the bolt head 2 will not rotate independently, and it can be disassembled.

[0039] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A type of internal hex screw with anti-theft function, characterized in that: Includes a stud (1), a bolt head (2), a metal insert (6), a hex wrench (16), and a hexagonal magnetic head (17), wherein: a bolt head (2) is rotatably mounted on one end of the stud (1), a positioning cavity (3) is provided inside the connection end between the stud (1) and the bolt head (2), one end of the positioning cavity (3) is connected to the outside of the stud (1), and the metal insert (6) is elastically and slidably mounted inside the positioning cavity (3) by a tension spring (7); The upper surface of the bolt head (2) is provided with an internal six-hole (4), and the lower surface of the bolt head (2) is provided with a socket (5) corresponding to the metal insert (6). A positioning pin (10) is fixedly installed on one side of the connection end between the stud (1) and the bolt head (2). The bolt head (2) has a positioning notch (11) corresponding to the positioning pin (10). One end of the hexagonal wrench (16) is fixedly equipped with a hexagonal magnetic head (17) corresponding to the internal hexagonal hole (4). The hexagonal strong magnetic head (17) is magnetically connected to the metal plug (6).

2. The anti-theft internal hex screw as described in claim 1, characterized in that: The stud (1) has a rotating cavity (8) at one end with a positioning cavity (3). The stud (1) is rotatably connected to the bolt head (2) through the rotating cavity (8). The rotating cavity (8) and the positioning cavity (3) are coaxially connected. The rotating cavity (8) is located between the positioning pin (10) and the positioning cavity (3). The opening of the rotating cavity (8) is connected to the outside of the stud (1).

3. The anti-theft internal hex screw as described in claim 2, characterized in that: The rotating cavity (8) has an integral constriction (9) inside the opening, and the constriction (9) is rotatably connected to the bolt head (2).

4. The anti-theft internal hex screw as described in claim 3, characterized in that: The bolt head (2) with a socket (5) is coaxially fixed to a rotating cylinder (14), and one end of the rotating cylinder (14) is rotatably installed in the rotating cavity (8) through a constriction (9).

5. The anti-theft internal hex screw as described in claim 4, characterized in that: The rotating drum (14) is fixedly installed on the outer side of one end of the rotating cavity (8) with an anti-detachment edge (15), and the anti-detachment edge (15) is in rotational contact with the rotating cavity (8) and the closing end (9).

6. A hex socket head cap screw with anti-theft function as described in claim 4, characterized in that: The bolt head (2) is fitted with a ring sleeve (12) on its outside. The outer circumferential surface of the ring sleeve (12) is provided with a positioning groove (13) corresponding to the positioning pin (10) and the positioning notch (11). The other end of the positioning pin (10) is flush with the outer edge of the ring sleeve (12).

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