Anti-disassembly and anti-theft device for screw

Abstract

The utility model discloses a screw anti-disassembly and anti-theft device, which relates to the technical field of screw anti-disassembly and anti-theft, and comprises a lower sleeve, a screw is nested in the lower sleeve, the tail end of the screw penetrates through the lower sleeve, and an annular step is arranged on the inner cavity wall of the lower sleeve; the upper sleeve is connected to the lower sleeve in a sleeved mode, a lock cylinder is fixed in the upper sleeve, the lock cylinder is inserted into the lower sleeve and penetrates through the annular step, and a corresponding key is arranged in the lock cylinder. Before the screw is installed, the screw needs to be placed in the lower sleeve and fastened through a tool, then the upper sleeve is arranged on the lower sleeve in a sleeved mode, locking is conducted through the lock cylinder, the lock teeth on the lock cylinder are locked through blocking of the annular step in the lower sleeve and cannot be pulled out outwards, and therefore a thief cannot prize the device through the tool, and the safety of the thief is guaranteed. Therefore, the anti-dismantling function of the screw is achieved, the screw cannot be dismantled, and various devices, parts and the like fixed through the screw have the anti-theft protection function.

Description

Technical Field

[0001] The utility model relates to the technical field of screw anti-disassembly and anti-theft, and in particular to a screw anti-disassembly and anti-theft device. Background Art

[0002] In daily life and work, there are many expensive devices and components that are fixed with screws and need to be exposed to the outdoors for a long time, which is not anti-theft. Therefore, the risk of loss is increased.

[0003] At present, in traditional screw fixing, the screws are mostly exposed. Thieves will use common tools to remove the screws to steal equipment and parts, causing direct economic losses to the owners of the equipment and parts. Utility Model Content

[0004] The utility model aims to provide a screw anti-disassembly and anti-theft device to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a screw anti-disassembly and anti-theft device, comprising:

[0006] A lower sleeve, wherein a screw is embedded in the interior of the lower sleeve, the tail end of the screw passes through the lower sleeve, and an annular step is provided on the inner cavity wall of the lower sleeve;

[0007] An upper sleeve is sleeved on a lower sleeve, a lock core is fixed in the upper sleeve, the lock core is inserted into the lower sleeve and passes through the annular step, and a corresponding key is arranged in the lock core.

[0008] Preferably, one end of the lower sleeve close to the upper sleeve is open, and the other end of the lower sleeve is provided with a through hole;

[0009] The screw rod of the screw passes through the through hole, the screw head of the screw is nested in the lower sleeve, the screw head diameter of the screw is larger than the diameter of the through hole, and the screw head diameter of the screw is smaller than the inner ring diameter of the annular step;

[0010] The screw rod of the screw can pass through the lower sleeve and the screw will not fall off the lower sleeve.

[0011] Preferably, one end of the upper sleeve close to the lower sleeve is open, and the other end of the upper sleeve is provided with a mounting hole;

[0012] A lock hole is provided at one end of the lock core, and a lock tooth is provided on the side wall of the other end of the lock core. The end of the lock core with the lock tooth passes through the annular step, and the lock tooth conflicts with the side wall of the annular step. The end of the lock core with the lock hole is fixed in the mounting hole. The lock tooth on the lock core is blocked by the annular step in the lower sleeve so that it cannot be pulled out, thereby making the upper sleeve firmly sleeved on the lower sleeve.

[0013] Preferably, the key is nested in the lock hole, and the lock core is closed and opened by the key.

[0014] Preferably, the lower sleeve and the upper sleeve are both tubular structures with simple structures.

[0015] Preferably, the lower sleeve and the annular step are integrally formed, so that the connection strength between the lower sleeve and the annular step is large.

[0016] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0017] By providing a lower sleeve, an upper sleeve and a lock core, before installing the screw, the screw needs to be put into the lower sleeve and tightened with a tool, and then the upper sleeve is put on the lower sleeve and locked with the lock core. The lock teeth on the lock core are blocked by the annular step in the lower sleeve to achieve locking and cannot be pulled out. Rotational force will cause the upper sleeve to rotate idly. The gap between the lower sleeve and the upper sleeve is very small, so that thieves cannot pry open the device with tools, thereby realizing the anti-dismantling function of the screw, the screw cannot be removed, and various equipment and components fixed by the screws are protected against theft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a three-dimensional cross-sectional view of the utility model;

[0021] Figure 3 It is an exploded view of the utility model;

[0022] Figure 4 It is a three-dimensional cross-sectional view of the lower sleeve of the utility model.

[0023] Description of reference numerals:

[0024] 10. lower sleeve; 11. annular step; 12. through hole;

[0025] 20. Screws;

[0026] 30. Upper sleeve; 31. Mounting hole;

[0027] 40. Lock core; 41. Lock teeth;

[0028] 50. Key. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The utility model provides Figures 1 to 4 A screw anti-disassembly and anti-theft device is shown, comprising:

[0031] A lower sleeve 10, wherein a screw 20 is nested inside the lower sleeve 10, wherein the tail end of the screw 20 passes through the lower sleeve 10, and an annular step 11 is provided on the inner cavity wall of the lower sleeve 10, wherein the lower sleeve 10 and the annular step 11 are integrally processed and formed, so that the connection strength between the lower sleeve 10 and the annular step 11 is large;

[0032] The upper sleeve 30, the lower sleeve 10 and the upper sleeve 30 are all tubular structures with a simple structure. The upper sleeve 30 is sleeved on the lower sleeve 10. A lock core 40 is fixed in the upper sleeve 30. The lock core 40 is inserted into the lower sleeve 10 and passes through the annular step 11. A corresponding key 50 is provided in the lock core 40.

[0033] One end of the lower sleeve 10 close to the upper sleeve 30 is open, and the other end of the lower sleeve 10 is provided with a through hole 12;

[0034] The screw rod of the screw 20 passes through the through hole 12, and the screw head of the screw 20 is nested in the lower sleeve 10. The screw head diameter of the screw 20 is larger than the diameter of the through hole 12, and the screw head diameter of the screw 20 is smaller than the inner ring diameter of the annular step 11;

[0035] The screw rod of the screw 20 can penetrate the lower sleeve 10 , and the screw 20 will not fall off the lower sleeve 10 .

[0036] One end of the upper sleeve 30 close to the lower sleeve 10 is open, and the other end of the upper sleeve 30 is provided with a mounting hole 31;

[0037] A lock hole is formed at one end of the lock core 40, and a lock tooth 41 is formed on the side wall of the other end of the lock core 40. The end of the lock core 40 with the lock tooth 41 passes through the annular step 11, and the lock tooth 41 conflicts with the side wall of the annular step 11. The end of the lock core 40 with the lock hole is fixed in the mounting hole 31. The lock tooth 41 on the lock core 40 is blocked by the annular step 11 in the lower sleeve 10, thereby locking and preventing it from being pulled out, so that the upper sleeve 30 is firmly sleeved on the lower sleeve 10.

[0038] The key 50 is nested in the lock hole, and the lock core 40 is closed and opened by the key 50 .

[0039] In the present invention, the actual sizes of the lower sleeve 10, the upper sleeve 30 and the lock core 40 are designed according to the size of the screw 20 that actually needs to be protected. Before installing the screw 20, the screw 20 needs to be placed in the lower sleeve 10 and tightened with a tool, and then the upper sleeve 30 is put on the lower sleeve 10 and locked by the lock core 40. The lock teeth 41 on the lock core 40 are blocked by the annular step 11 in the lower sleeve 10 to achieve locking and cannot be pulled out. Rotational force will cause the upper sleeve 30 to idle. The gap between the lower sleeve 10 and the upper sleeve 10 is very small, so that thieves cannot pry open the device with tools, thereby realizing the anti-dismantling function of the screw 20, the screw 20 cannot be removed, and various equipment and components fixed by the screw 20 are protected against theft.

[0040] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A screw anti-disassembly and anti-theft device, characterized in that: include: A lower sleeve (10), wherein a screw (20) is nested inside the lower sleeve (10), and the tail end of the screw (20) passes through the lower sleeve (10), and the inner cavity wall of the lower sleeve (10) is provided with an annular step (11); An upper sleeve (30) is sleeved on a lower sleeve (10), a lock core (40) is fixed in the upper sleeve (30), the lock core (40) is inserted into the lower sleeve (10) and passes through the annular step (11), and a corresponding key (50) is arranged in the lock core (40).

2. A screw anti-disassembly and anti-theft device according to claim 1, characterized in that: One end of the lower sleeve (10) close to the upper sleeve (30) is open, and the other end of the lower sleeve (10) is provided with a through hole (12); The screw rod of the screw (20) passes through the through hole (12), the screw head of the screw (20) is nested in the lower sleeve (10), the screw head diameter of the screw (20) is larger than the diameter of the through hole (12), and the screw head diameter of the screw (20) is smaller than the inner ring diameter of the annular step (11).

3. A screw anti-disassembly and anti-theft device according to claim 1, characterized in that: One end of the upper sleeve (30) close to the lower sleeve (10) is open, and the other end of the upper sleeve (30) is provided with a mounting hole (31); A lock hole is formed at one end of the lock core (40), and a lock tooth (41) is formed on the side wall of the other end of the lock core (40). The end of the lock core (40) with the lock tooth (41) passes through the annular step (11), and the lock tooth (41) abuts against the side wall of the annular step (11). The end of the lock core (40) with the lock hole is fixed in the mounting hole (31).

4. A screw anti-disassembly and anti-theft device according to claim 3, characterized in that: The key (50) is nested in the lock hole.

5. The screw anti-disassembly and anti-theft device according to claim 1, characterized in that: The lower sleeve (10) and the upper sleeve (30) are both circular tubular structures.

6. The screw anti-disassembly and anti-theft device according to claim 1, characterized in that: The lower sleeve (10) and the annular step (11) are integrally formed.

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