Lock cylinder for anti-theft label
By introducing a limiting groove and limiting strip structure into the anti-theft tag lock cylinder, the movement trajectory of the iron cup is restricted, solving the problem of the iron cup shifting due to external collisions and enabling the normal use of the lock cylinder.
Patent Information
- Application Number
- CN202422901504.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-27
AI Technical Summary
When the lock core of the existing anti-theft tag is unlocked, the iron cup is easily displaced due to external collisions, causing the lock core to be unable to be used normally.
Design a lock cylinder structure in which the movement trajectory of the iron cup is limited by a limiting groove and a limiting bar to ensure that the iron cup moves vertically and avoids tilting or deflection. Combined with the attraction of a strong magnet, normal reset is achieved.
Ensure that the iron cup can be properly reset during the unlocking process, avoid displacement caused by external impact, and ensure the normal use of the lock cylinder.
Smart Images
Figure CN223482463U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a lock cylinder for anti-theft tags. Background Technology
[0002] Anti-theft tags are devices used to prevent theft of goods. They are commonly used in retail environments such as shopping malls and supermarkets, achieving anti-theft functionality by attaching special tags to products. Anti-theft tags typically consist of a tag shell, lock cylinder, locking pin, and radio frequency chip. The lock cylinder is the core component that ensures the anti-theft tag is stably fixed to the product. It usually consists of a shell, a metal cup, metal balls, and springs. When the locking pin is inserted into the lock cylinder, the metal cup, under the action of the spring, firmly presses against the inner wall of the lock cylinder shell, and the locking pin is clamped between the metal balls, thus locking. Existing anti-theft tag lock cylinders typically unlock by using a strong magnet to attract the metal cup and metal balls inside the lock cylinder, releasing the locking pin clamped between the metal balls. However, because there is a certain space between the metal cup and the inner wall of the lock cylinder shell, the metal cup is prone to displacement due to external impacts during the movement of the metal cup attracted by the strong magnet, making it difficult for the metal cup to return to its original position and causing the lock cylinder to malfunction. Therefore, it is necessary to develop a lock cylinder for anti-theft tags to solve the above problems. Utility Model Content
[0003] The purpose of this invention is to provide a lock cylinder for anti-theft tags to solve the problems mentioned in the background art.
[0004] To solve the above problems, the present invention adopts the following technical solution:
[0005] A lock cylinder for anti-theft tags includes a housing, a top cover at the top of the housing, a lock hole at the bottom of the housing, three iron balls inside the housing that abut against the inner wall of the housing, an iron cup above the three iron balls, a lock hole at the bottom of the iron cup, the lock hole and the lock hole are on the same vertical line, a cap on the top cover, a spring between the cap and the iron cup, a limiting ring fixedly mounted on the side wall of the iron cup, the limiting ring having multiple limiting grooves, and multiple limiting strips corresponding to the limiting grooves fixedly mounted on the inner wall of the upper part of the housing, each limiting strip being slidably connected to the corresponding limiting groove.
[0006] Preferably, the plurality of limiting grooves are arranged in a ring at equal intervals on the limiting ring, and the plurality of limiting strips are arranged in a ring at equal intervals on the inner wall of the upper part of the outer shell.
[0007] Preferably, a mounting ring is fixedly provided on the side wall of the top of the outer casing, and the top cover is connected to the mounting ring by bolts.
[0008] Preferably, the lower part of the outer shell is frustum-shaped, and the three iron balls abut against the inclined inner wall of the lower part of the outer shell.
[0009] Preferably, the top cover and the cap are an integrated structure.
[0010] The beneficial effects of this utility model are: This utility model uses multiple limiting strips and corresponding limiting grooves to restrict the movement trajectory of the iron cup. When the iron cup is attracted by a strong magnet, the iron cup will only move vertically and will not tilt or deflect due to external collisions, ensuring that the iron cup attracted by the strong magnet can be reset normally afterward, thereby ensuring the normal use of the lock cylinder. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the protection scope of this utility model.
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 For this utility model Figure 1 Schematic diagram of the installation of the middle limiting ring on the iron cup;
[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the installation of the middle limiting strip inside the casing;
[0015] Figure 4 For this utility model Figure 1 A schematic diagram of the installation of the iron ball inside the casing.
[0016] In the diagram: 11. Outer shell; 12. Top cover; 13. Cap; 14. Mounting ring; 15. Iron cup; 16. Iron ball; 17. Spring; 18. Lock hole one; 19. Lock hole two; 20. Restriction ring; 21. Restriction strip; 22. Restriction groove. Detailed Implementation
[0017] See Figures 1 to 4The lock cylinder shown is for an anti-theft tag and includes a housing 11. The top of the housing 11 has a top cover 12, and the bottom of the housing 11 has a first lock hole 18. Three iron balls 16 are disposed inside the housing 11, all three iron balls 16 abutting against the inner wall of the housing 11. An iron cup 15 is disposed above the three iron balls 16, and a second lock hole 19 is disposed at the bottom of the iron cup 15. The first lock hole 18 and the second lock hole 19 are on the same vertical line. A cap 13 is disposed on the top cover 12, and a spring 17 is disposed between the cap 13 and the iron cup 15. A retaining device is fixedly disposed on the side wall of the iron cup 15. The locking ring 20 has multiple limiting grooves 22. Multiple limiting strips 21 corresponding to the limiting grooves 22 are fixedly installed on the inner wall of the upper part of the outer shell 11. Each limiting strip 21 is slidably connected to the corresponding limiting groove 22. The multiple limiting strips 21 cooperate with the corresponding limiting grooves 22 to limit the movement trajectory of the iron cup 15. When the iron cup 15 is attracted by a strong magnet, the iron cup 15 will only move vertically and will not tilt or deflect due to external collisions, ensuring that the iron cup 15 attracted by the strong magnet can be reset normally afterward, thereby ensuring the normal use of the lock cylinder.
[0018] Furthermore, a plurality of the limiting grooves 22 are arranged in a ring at equal intervals on the limiting ring 20, and a plurality of the limiting strips 21 are arranged in a ring at equal intervals on the inner wall of the upper part of the outer shell 11.
[0019] Furthermore, a mounting ring 14 is fixedly provided on the side wall of the top of the outer shell 11, and the top cover 12 is connected to the mounting ring 14 by bolts; the top cover 12 covers the top of the outer shell 11 and is connected to the mounting ring 14 by bolts, so that the top cover 12 stably seals the opening at the top of the outer shell 11. At this time, the spring 17 is in a compressed state, and the force applied by the spring 17 to the iron cup 15 makes the iron cup 15 press tightly against the iron balls 16, so that the three iron balls 16 are pressed between the inner wall of the outer shell 11 and the bottom of the iron cup 15.
[0020] Furthermore, the lower part of the outer shell 11 is frustum-shaped, and the three iron balls 16 abut against the inclined inner wall of the lower part of the outer shell 11. When the locking pin is inserted between the three iron balls 16, the iron cup 15 presses down on the iron balls 16 under the action of the spring 17. At the same time, the three iron balls 16 are pressed between the inner wall of the outer shell 11 and the bottom of the iron cup 15, and the locking pin is clamped by the three iron balls 16. When the iron cup 15 and the iron balls 16 are attracted upward by the strong magnet, the three iron balls 16 no longer abut against the inclined inner wall of the lower part of the outer shell 11, and the three iron balls 16 become loose, thereby releasing the locking pin.
[0021] Furthermore, the top cover 12 and the cap 13 are an integrated structure.
[0022] The working principle of this utility model is as follows: When the anti-theft tag is in use, the lock cylinder is installed inside the tag shell. The locking pin passes through the first lock hole 18 and through the gap between the three iron balls 16. Finally, the locking pin passes through the second lock hole 19. At this time, the iron cup 15 presses down on the iron balls 16 under the action of the spring 17. While the three iron balls 16 are pressed between the inner wall of the outer shell 11 and the bottom of the iron cup 15, the locking pin is clamped by the three iron balls 16. When unlocking, a strong magnet attracts the iron cup 15 and the iron balls 16. Under the action of the magnetic force, the iron cup 15 and the iron balls 16... As the lock moves upward, the three iron balls 16 no longer press against the inclined inner wall at the bottom of the outer casing 11, and the three iron balls 16 become loose, thus releasing the lock pin. The lock pin can then be pulled away to complete the unlocking process. During this process, multiple limiting strips 21 cooperate with the corresponding limiting grooves 22 to restrict the movement trajectory of the iron cup 15. The iron cup 15 will only move vertically and will not tilt or deflect due to external collisions, ensuring that the iron cup 15 attracted by the strong magnet can be reset normally afterward, thereby ensuring the normal use of the lock cylinder.
[0023] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.
Claims
1. A lock cylinder for anti-theft tags, characterized in that: The device includes an outer casing, a top cover on the top of the casing, a first lock hole on the bottom of the casing, three iron balls inside the casing that abut against the inner wall of the casing, an iron cup on the upper side of the three iron balls, a second lock hole on the bottom of the iron cup, the first lock hole and the second lock hole being on the same vertical line, a cap on the top cover, a spring between the cap and the iron cup, a limiting ring fixedly installed on the side wall of the iron cup with multiple limiting grooves, and multiple limiting strips corresponding to the limiting grooves fixedly installed on the inner wall of the upper part of the casing, each limiting strip being slidably connected to the corresponding limiting groove.
2. A lock cylinder for anti-theft tags according to claim 1, characterized in that: Multiple limiting grooves are arranged in a ring at equal intervals on the limiting ring, and multiple limiting strips are arranged in a ring at equal intervals on the inner wall of the upper part of the outer shell.
3. A lock cylinder for anti-theft tags according to claim 1, characterized in that: An installation ring is fixedly installed on the side wall of the top of the outer casing, and the top cover is connected to the installation ring by bolts.
4. A lock cylinder for anti-theft tags according to claim 1, characterized in that: The lower part of the outer shell is truncated cone-shaped, and the three iron balls abut against the inclined inner wall of the lower part of the outer shell.
5. A lock cylinder for anti-theft tags according to claim 1, characterized in that: The top cover and the cap are an integrated structure.