Mechanical anti-theft device
By designing a mechanical anti-theft device that combines magnetism and password, and utilizing the fixed structure of steel balls and annular slots and the rotation unlocking mechanism of the limit rod, the problem of existing anti-theft devices being easily cracked is solved, achieving efficient anti-theft of supermarket goods.
Patent Information
- Application Number
- CN202520490925.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Existing supermarket anti-theft magnetic tags are easily cracked, traditional mechanical locks cannot be used, and electronic anti-theft systems are easily interfered with, resulting in high rates of merchandise theft and difficulties in security management.
Design a mechanical anti-theft device that combines magnetic and password unlocking mechanisms. Through the fixed structure of the steel ball and the annular slot and the cooperation of the limiting rod, combined with the knob rotation unlocking mechanism, the steel needle is ensured to be stable and securely unlocked.
It improves anti-theft performance, prevents unauthorized opening, ensures the safety of protected items, and enhances the reliability of anti-theft measures for supermarket goods.
Smart Images
Figure CN223908015U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a theftproof technical field, concretely is a mechanical theftproof device. BACKGROUND
[0002] In the modern commercial environment, supermarkets as the place of concentrated sales of goods, are faced with the problem of loss of goods. Theft not only leads to direct economic losses of supermarkets, but also indirectly increases operating costs, and damages the interests of merchants and consumers. At present, supermarkets widely use anti-theft magnetic buckles as an important means of commodity theft prevention. Anti-theft magnetic buckles use magnetic principle, and when not treated by professional demagnetization equipment, they will trigger the alarm device at the supermarket outlet.
[0003] However, this seemingly effective anti-theft magnetic buckle has serious safety hazards. Its structure and principle determine that it is extremely easy to be cracked, and only a strong magnet is needed for the criminal to easily open the magnetic buckle and take the goods out of the supermarket without triggering the alarm. In reality, there have been many theft cases showing that thieves use this loophole to carry strong magnets into supermarkets to commit theft, which brings great challenges to the safety management of supermarkets. At the same time, traditional mechanical locks cannot be applied to supermarket commodity theft prevention, and electronic theft prevention systems have problems such as dependence on power supply and vulnerability to interference. Under this background, it is particularly important and urgent to develop a new mechanical theftproof device with reliable anti-theft performance and not easy to be cracked to improve the level of supermarket commodity theft prevention and maintain the commercial order. CONTENT OF THE UTILITY MODEL
[0004] (I) Technical problems solved
[0005] In view of the deficiencies of the prior art, the utility model provides a mechanical theftproof device with a dual theftproof mechanism combining magnetism and password, which greatly improves the anti-theft performance and has other advantages, and solves the above technical problems.
[0006] (II) Technical solutions
[0007] To achieve the above object, the utility model provides the following technical scheme: a mechanical anti -theft device, including casing and steel needle, the inside fixedly connected with the sleeve of casing, the inner wall of sleeve is embedded first cone, the inside of first cone is provided second cone, the inner wall of second cone is pasted with metal pressing sheet, the top surface of metal pressing sheet is in friction with spring, the outer wall of second cone is equipped with limit hole, the inside of limit hole contacts steel ball, the top surface of casing is welded with conical cap, the inside rotationally connected with the eye of conical cap, the lower surface of eye is fixedly connected with one round plate, and the inside rotationally connected with sleeve rod of eye, the bottom fixedly connected with two round plates of sleeve rod, the lower surface of one round plate is fixedly connected with limit rod no.
[0008] Preferably, the outer circumferential surface of the steel needle is provided with an annular clamping groove, and the bottom surface of the casing, the first cone and the second cone is provided with a through hole penetrating through the center.
[0009] Preferably, the outer wall of the second cone is provided with two limit holes around the axial direction, the lower surface of the metal pressing sheet contacts two steel balls, and the top surface of the metal pressing sheet is provided with an insertion hole penetrating through the center.
[0010] Preferably, the top end of the spring is in friction with the inner top surface of the conical cap, and the bottom end of the spring is in friction with the metal pressing sheet, the inner wall of the second cone is fixedly connected with a limit strip, and the limit strip is in friction with the metal pressing sheet.
[0011] Preferably, the upper surface of the metal pressing sheet is provided with two round holes penetrating through, the knob one is coaxial with the knob two, and the top surface of the knob one is in friction with the knob two.
[0012] Preferably, the top surface of the conical cap and the knob one is engraved with nine notches around the axial direction, and the top surface of the knob one and the knob two is provided with an indicating groove.
[0013] Compared with the prior art, the utility model provides a kind of mechanical anti -theft device, with the following beneficial effects:
[0014] The utility model discloses a clever structure design, realize the stable fixation and safety unlocking of steel needle;In fixed aspect, the cooperation of steel ball and annular clamping groove is used, the common effect of first cone, metal pressing sheet and spring is combined, effectively prevent steel needle from being easily pulled out by external force, ensure the stability of anti -theft device in normal use state;In unlocking aspect, double unlocking mechanism is set, limit rod is rotated to make round hole on metal pressing sheet first, then strong magnet is adsorbed to extract steel needle, greatly improve the anti -theft performance, effectively prevent illegal opening, guarantee the safety of protected article. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;
[0016] Figure 2 This is a three-dimensional cross-sectional view of the structure of this utility model;
[0017] Figure 3 This is a three-dimensional schematic diagram of the components such as the metal pressure plate, the limiting rod one, and the limiting rod two in the structure of this utility model;
[0018] Figure 4 This is a three-dimensional schematic diagram of the second cone and the metal pressure plate in the structure of this utility model.
[0019] The components are: 1. Shell; 2. Sleeve; 3. First cone; 4. Second cone; 5. Metal pressure plate; 6. Spring; 7. Limiting hole; 8. Steel ball; 9. Conical cap; 10. Collar; 11. No. 1 circular plate; 12. Sleeve rod; 13. No. 2 circular plate; 14. Limiting rod one; 15. Limiting rod two; 16. Knob one; 17. Knob two; 18. Steel needle; 19. Annular groove; 20. Through hole; 21. Limiting strip. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figures 1-4 A mechanical anti-theft device includes a housing 1 and a steel needle 18. A sleeve 2 is fixedly connected inside the housing 1. A first cone 3 is embedded in the inner wall of the sleeve 2. A second cone 4 is disposed inside the first cone 3. A metal pressure plate 5 is attached to the inner wall of the second cone 4. A spring 6 is abutted on the top surface of the metal pressure plate 5. A limit hole 7 is opened on the outer wall of the second cone 4. A steel ball 8 is contacted inside the limit hole 7. A conical cap 9 is fused to the top surface of the housing 1. A collar 10 is rotatably connected inside the conical cap 9. A first circular plate 11 is fixedly connected to the lower surface of the collar 10. A sleeve rod 12 is rotatably connected inside the collar 10. A second circular plate 13 is fixedly connected to the bottom end of the sleeve rod 12. A limit rod 14 is fixedly connected to the lower surface of the first circular plate 11. A limit rod 15 is fixedly connected to the lower surface of the second circular plate 13. A knob 16 is connected to the top surface of the collar 10 by a screw. A knob 17 is connected to the top end of the sleeve rod 12 by a bolt.
[0022] Specifically, the outer circumferential surface of the steel needle 18 is provided with an annular clamping groove 19, and the bottom surface of the shell 1, the first tapered cylinder 3 and the second tapered cylinder 4 is provided with a through hole 20.
[0023] Specifically, the outer wall of the second tapered cylinder 4 is provided with two limiting holes 7 around the axial direction thereof, the lower surface of the metal pressing sheet 5 contacts two steel balls 8, and the top surface of the metal pressing sheet 5 is provided with an insertion hole.
[0024] Advantages are that by inserting the steel needle 18 into the through hole 20, the steel needle 18 enters the inside of the second tapered cylinder 4, and the steel needle 18 is inserted into the insertion hole on the top surface of the metal pressing sheet 5. As the steel needle 18 penetrates, its outer surface will contact the two steel balls 8. Once the two steel balls 8 contact the annular clamping groove 19, and the inner wall of the first tapered cylinder 3 abuts against the steel balls 8, and the metal pressing sheet 5 abuts against the steel balls 8 under the action of the spring 6, the two steel balls 8 are abutted in the annular clamping groove 19, and the overall structure can fix the steel needle 18. Thus, even if the steel needle 18 is pulled by external force, it cannot be separated from the second tapered cylinder 4.
[0025] Specifically, the top end of the spring 6 abuts against the inner top surface of the conical cap 9, and the bottom end of the spring 6 abuts against the metal pressing sheet 5. The inner wall of the second tapered cylinder 4 is fixedly connected with a limiting strip 21, and the limiting strip 21 abuts against the metal pressing sheet 5.
[0026] Specifically, the upper surface of the metal pressing sheet 5 is provided with two round holes, the knob one 16 and the knob two 17 are coaxial, and the top surface of the knob one 16 is attached to the knob two 17.
[0027] Advantages are that when a strong magnet is directly attached to the top of the conical cap 9, although the strong magnet can generate an attractive force on the metal pressing sheet 5, since the limiting rod one 14 and the limiting rod two 15 abut against the metal pressing sheet 5, the metal pressing sheet 5 cannot rise due to the attractive force of the strong magnet at this time. Thus, the steel needle 18 cannot be separated, that is, the strong magnet alone cannot unlock the anti-theft device.
[0028] Specifically, the top surface of the conical cap 9 and the knob one 16 is engraved with nine engraved grooves around the axial direction thereof, and the top surface of the knob one 16 and the knob two 17 is provided with an indicating groove.
[0029] The advantages are that: by rotating the knob 16 to drive the sleeve ring 10 to rotate, the sleeve ring 10 drives the first circular plate 11 to rotate, the first circular plate 11 drives the limiting rod 14 to rotate, by rotating the knob 17 to drive the sleeve rod 12 to rotate, the sleeve rod 12 drives the second circular plate 13 to rotate, the second circular plate 13 drives the limiting rod 15 to rotate, nine grooves are engraved on the top surface of the conical cap 9 and the knob 16, each groove corresponds to a different number, when the top surface of the knob 16 and the knob 17 is provided with an indicating groove and points to the correct number groove, so that the limiting rod 14 and the limiting rod 15 correspond to the two round holes on the metal pressing sheet 5, and then a strong magnet is attached to the top end of the conical cap 9, so that the strong magnet generates an attractive force on the metal pressing sheet 5 to drive the second conical cylinder 4 to rise, so that the gap between the second conical cylinder 4 and the first conical cylinder 3 is increased, and the steel ball 8 is no longer abutted by the first conical cylinder 3, so that the steel needle 18 can be easily pulled out, and the overall structure is provided with a double unlocking mechanism, which greatly improves the anti-theft performance.
[0030] In use, first, the steel needle 18 is inserted into the through hole 20 in the center of the bottom surface of the shell 1, the first conical cylinder 3 and the second conical cylinder 4, the steel needle 18 enters the inside of the second conical cylinder 4 and is inserted into the insertion hole in the top surface of the metal pressing sheet 5, as it penetrates, the outer surface of the steel needle 18 contacts the two steel balls 8, when the steel balls 8 enter the annular clamping groove 19, under the action of the inner wall of the first conical cylinder 3, the metal pressing sheet 5 and the spring 6, the steel balls 8 abut in the annular clamping groove 19, fixing the steel needle 18; if unlocking is required, first, the knob 16 is rotated to drive the sleeve ring 10, the first circular plate 11 and the limiting rod 14 to rotate, the knob 17 is rotated to drive the sleeve rod 12, the second circular plate 13 and the limiting rod 15 to rotate, the indicating groove in the top surface of the knob 16 and the knob 17 is directed to the corresponding correct number groove engraved on the top surface of the conical cap 9, so that the limiting rod 14 and the limiting rod 15 correspond to the two round holes on the metal pressing sheet 5, then a strong magnet is attached to the top end of the conical cap 9, the strong magnet generates an attractive force on the metal pressing sheet 5 to drive the second conical cylinder 4 to rise, the gap between the second conical cylinder 4 and the first conical cylinder 3 is increased, and the steel ball 8 is no longer abutted by the first conical cylinder 3, at this time, the steel needle 18 can be easily pulled out.
[0031] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A mechanical anti-theft device comprising a housing (1) and a steel needle (18), characterized in that: The inside of the shell (1) is fixedly connected with a sleeve (2), a first cone (3) is embedded on the inner wall of the sleeve (2), a second cone (4) is arranged in the inside of the first cone (3), a metal pressing sheet (5) is attached to the inner wall of the second cone (4), the top surface of the metal pressing sheet (5) abuts against a spring (6), a limiting hole (7) is arranged on the outer wall of the second cone (4), a steel ball (8) is in contact with the inside of the limiting hole (7), a conical cap (9) is welded on the top surface of the shell (1), a sleeve ring (10) is rotatably connected in the inside of the conical cap (9), a first circular plate (11) is fixedly connected to the lower surface of the sleeve ring (10), a sleeve rod (12) is rotatably connected in the inside of the sleeve ring (10), a second circular plate (13) is fixedly connected to the bottom end of the sleeve rod (12), a limiting rod one (14) is fixedly connected to the lower surface of the first circular plate (11), a limiting rod two (15) is fixedly connected to the lower surface of the second circular plate (13), a knob one (16) is connected to the top surface of the sleeve ring (10) through screws, and a knob two (17) is connected to the top end of the sleeve rod (12) through bolts.
2. A mechanical anti-theft device according to claim 1, characterized in that: An annular clamping groove (19) is arranged on the outer circumferential surface of the steel needle (18), and a through hole (20) is arranged in the center of the bottom surface of the shell (1), the first cone (3) and the second cone (4).
3. A mechanical anti-theft device according to claim 1, characterized in that: Two limiting holes (7) are arranged on the outer wall of the second cone (4) around the axial direction thereof, the lower surface of the metal pressing sheet (5) contacts two steel balls (8), and an insertion hole is arranged in the center of the top surface of the metal pressing sheet (5).
4. A mechanical anti-theft device according to claim 1, characterized in that: The top end of the spring (6) abuts against the inner top surface of the conical cap (9), and the bottom end of the spring (6) abuts against the metal pressing sheet (5), a limiting strip (21) is fixedly connected to the inner wall of the second cone (4), and the limiting strip (21) abuts against the metal pressing sheet (5).
5. A mechanical anti-theft device according to claim 1, characterized in that: Two round holes are arranged in the upper surface of the metal pressing sheet (5), the knob one (16) and the knob two (17) are coaxial, and the top surface of the knob one (16) abuts against the knob two (17).
6. A mechanical anti-theft device according to claim 1, characterized in that: Nine grooves are engraved on the top surfaces of the conical cap (9) and the knob one (16) around the axial direction thereof, and indication grooves are arranged on the top surfaces of the knob one (16) and the knob two (17).