A rotary unlocking EAS tag and its use method

Abstract

The present invention relates to a rotary unlocking EAS tag and its use method which not only has better stability in use, but also has faster production efficiency, lower production cost and good use effect. A lock core component is arranged in the lock core installation cavity in the shell, a limit plate is arranged on the outer peripheral surface of the lock core column in the lock core component, and a steel ball is arranged in the lock core installation cavity. When the tag is in a locked state, the steel ball is clamped between the bottom surface of the lock core installation cavity and the limit plate; a notch is arranged on the outer peripheral surface of the limit plate, and the rotating side magnetic steel drives the steel ball to move and align the steel ball with the rear end surface magnetic steel of the notch by attracting the steel ball in the lock core component so that the lock core column compresses the elastic element and the steel ball is located in the notch. Advantages: First, the mechanism makes the steel ball become a single clamping component, thereby improving the use stability of the entire mechanism, reducing the production cost of the entire mechanism, and ensuring the anti-theft safety of the mechanism; second, the setting of the partition in the mechanism makes it have a better use effect.

Description

Technical Field

[0001] The present invention relates to a rotary unlocking EAS tag and a use method thereof, which has better use stability, faster production efficiency, lower production cost and good use effect, and belongs to the technical field of commodity protection. Background Art

[0002] The current product protection solution on the market is an anti-theft method based on the combination of EAS tags and single magnetic steel upper and lower adsorption unlocking.

[0003] The tags designed by our company are based on multiple sets of magnets (one for up and down adsorption, and at least two for rotational adsorption in a dynamic combination), that is, a dedicated magnetic unlocker. This greatly increases the difficulty of cracking the EAS tag, thereby improving the anti-theft effect of the EAS tag. For this reason, our company and its subsidiaries have developed and designed a series of product protection devices that match this dedicated magnetic unlocker.

[0004] For example, a prior patent owned by a wholly-owned subsidiary of the present applicant, CN 210087044 U, entitled "A Product Protection Device," comprises a housing, a lock core component, a frequency element, and an anti-theft nail. The housing comprises a lock core mounting cavity, in which a lock core component is located. A rotating member in the lock core component, driven by a magnetic unlocking mechanism, can push the lock core column downward, and the downwardly moving lock core column compresses a reset spring. The bottom surface of the lock core mounting cavity is provided with an arc-shaped ramp groove on each side, and each of the two arc-shaped ramp grooves has a positioning groove at its top. The lower end surface of the rotating member is provided with two steel ball retaining grooves, each containing a steel ball, which rests at the lowest point of the corresponding arc-shaped ramp groove. The depth of the positioning groove is less than or equal to the radius of the steel ball, or greater than the radius of the steel ball. The housing comprises an annular cavity located outside the lock core mounting cavity, and the frequency element is located within the annular cavity. The housing includes an upper cover and a lower cover; when the upper cover and the lower cover are fastened together to form the housing, the upper lock core installation cavity in the upper cover and the lower lock core installation cavity in the lower cover are combined to form a lock core installation cavity, and the upper annular cavity in the upper cover and the lower annular cavity in the lower cover are combined to form an annular cavity. The bottom surface of the lock core installation cavity is provided with two slots, and the two slots are located inside the bottom of the corresponding arc-shaped ramp groove. The slots and the corresponding arc-shaped ramp groove are mutually connected, and the depth of the slots is greater than the maximum depth of the arc-shaped ramp groove. The lower end surface of the rotating member is provided with two steel ball slots, and the two steel ball slots are connected to the corresponding steel ball limiting grooves. When the two steel ball limiting grooves are located directly above the bottom of the corresponding arc-shaped ramp groove, the two steel ball slots are located directly above the corresponding slots. The bottom surface of the lock cylinder mounting cavity is provided with a boss in the center, and the upper end surface of the boss is provided with a groove that matches the bottom surface contour of the lock cylinder. The lock cylinder is installed in the lock cylinder mounting cavity by inserting the lower end of the lock cylinder into the groove, and a return spring is provided between the lock cylinder and the bottom surface of the groove. The lower end surface of the rotating member is provided with a circular groove in the center, and the rotating member is installed in the lock cylinder mounting cavity by engaging the circular groove with the boss. A plurality of protrusions are evenly distributed on the lower portion of the outer circumference of the lock cylinder, and the inner wall surface of the groove is provided with a plurality of protrusion slots, and the size of the protrusion slots matches the size of the protrusions. The outer wall surface of the boss is provided with three equidistant recessed grooves, and the length of the boss is greater than the depth of the circular groove. The positioning groove is a spherical groove. Its shortcomings are: the protective device of this product uses a steel ball to drive the accessory (rotating part) to rotate to unlock the lock cylinder. Since the device is locked and unlocked by the combined action of the steel ball and the rotating part, it has more components (so the probability of problems with the device is greater and the production cost is higher), and its internal structure is more complex (so the production efficiency of the device is lower, and the production cost will be further increased). Summary of the Invention

[0005] Design purpose: In order to avoid the shortcomings of the background technology, a rotary unlocking EAS tag and its use method are designed, which not only has better stability in use, but also has faster production efficiency, lower production cost and good use effect.

[0006] Design plan: To achieve the above design objectives.

[0007] 1. A limit plate is provided on the outer circumference of the lock core column in the lock core component, and a steel ball is provided in the lock core installation cavity. When the tag is in a locked state, the steel ball is clamped between the bottom surface of the lock core installation cavity and the limit plate; a notch is provided on the outer circumference of the limit plate. When the rotating side magnet drives the steel ball to move and aligns the steel ball with the notch, the end face magnet attracts the steel ball in the lock core component to cause the lock core column to compress the elastic element and the steel ball to be located in the notch. At this time, the tag is in an unlocked state. This design is one of the technical features of the present invention. The purpose of this design is that when using a magnetic unlocking device to unlock, the EAS tag is first placed on the magnetic unlocking device. At this time, the side magnet will attract the corresponding steel ball. Under the attraction of the corresponding side magnet, the steel ball will cling to the inner wall of the lock core installation cavity and face the corresponding side magnet. That is, the steel ball will change from a free and disordered state to an ordered state. After that, the magnetic unlocking device rotates, and multiple rotating side magnets will drive the corresponding steel balls to rotate synchronously. When the steel ball rotates to the bottom of the corresponding notch, that is, when the steel ball is rotated by the external unlocking device and brought into the corresponding unlocking area at the same time, the end magnet will drive the lock core column and the limit plate to move downward together to achieve unlocking. Remove the EAS tag from the magnetic unlocking device. Due to the attraction, the steel ball will When the gravitational force disappears, the lock core column and the limit plate move upward together under the action of the restoring force of the elastic element, thereby resetting the limit plate. After the limit element returns to its original position, the bottom space is exposed, and the steel ball rolls to any position in the locking area. Later, when the anti-theft nail is inserted into the EAS tag again, the lock core component will jam the anti-theft nail, preventing it from exiting the lock core part, thereby achieving locking. Since the present invention makes the steel ball a separate locking component, this not only greatly reduces the use of EAS tag mechanism assembly accessories, but also greatly simplifies the internal structure design of the EAS tag mechanism, while ensuring the safety of the EAS tag mechanism, thereby improving the stability of the entire mechanism, reducing the production cost of the entire mechanism, and ensuring the anti-theft security of the mechanism.

[0008] 2. The design of the inner wall surface of the lock core installation cavity as a circular wall surface is the second technical feature of the present invention. The purpose of this design is that when there are multiple steel balls, especially more than three, these steel balls in a disordered state are in an ordered state under the attraction of the corresponding side magnets (at this time, the side magnets will attract the corresponding steel balls, and the steel balls are closely attached to the inner wall surface of the lock core installation cavity under the attraction of the corresponding side magnets, and the steel balls are facing the corresponding side magnets). Since the inner wall surface of the lock core installation cavity is a circular wall surface, the multiple steel balls in an ordered state are driven by the multiple side magnets to move synchronously and simultaneously to the corresponding unlocking area (the area where the notch is located). The more steel balls there are, the better the limiting effect of the limit plate is, and the anti-theft effect can be improved (the number of side magnets needs to match the number of steel balls to unlock, and the number of internal steel balls cannot be known by outsiders).

[0009] 3. The third technical feature of the present invention is that there are multiple steel balls, the outer circumference of the limit plate is provided with multiple notches, and the lower end surface of the limit plate is divided into multiple steel ball separation zones by a partition, each of which is provided with a notch and a steel ball. The purpose of this design is that there are multiple steel balls, the outer circumference of the limit plate is provided with multiple notches, and the lower end surface of the limit plate is divided into multiple steel ball separation zones by a partition, each of which is provided with a notch and a steel ball. The partition prevents two or more steel balls from resetting in the same area (i.e., prevents two or more steel balls from being attracted by the same side magnet), thereby avoiding the aforementioned problem of being unable to unlock.

[0010] 4. The design of the partitions being located on either side of the corresponding notch openings is the fourth technical feature of the present invention. This design aims to prevent two or more steel balls from being relocated in the same area and to position the steel balls that have moved to the unlocking area, ensuring they are simultaneously located in the corresponding unlocking area, thereby further ensuring that the EAS tag mechanism can be properly unlocked.

[0011] 5. The design of an elastic element mounting groove provided on the bottom surface of the lock core mounting cavity and an annular baffle at the notch of the elastic element mounting groove is the fifth technical feature of the present invention. The purpose of this design is to provide the elastic element mounting groove on the bottom surface of the lock core mounting cavity and an annular baffle at the notch of the elastic element mounting groove. The annular baffle not only serves to limit the steel ball (limiting the steel ball retaining area to prevent contact between the steel ball and the elastomer), but also serves to limit the downward limit plate (the height of the annular baffle matches the hemispherical diameter of the steel ball), preventing the steel ball from getting stuck in the notch.

[0012] 6. The two side walls of the notch are arranged in an "eight" shape, and the inner side wall of the notch is a convex curved surface, which is the sixth technical feature of the present invention. The purpose of this design is that the two side walls of the notch are arranged in an "eight" shape, and the inner side wall of the notch is a convex curved surface. This notch structure not only allows the descending limit plate to pass through the steel ball more smoothly, but also further prevents the steel ball from getting stuck in the notch.

[0013] Technical Solution 1: A rotary unlocking EAS tag comprises a shell, a lock core part is provided in the lock core installation cavity of the shell, a limit plate is provided on the outer peripheral surface of the lock core column in the lock core part, a steel ball is provided in the lock core installation cavity, and when the tag is in a locked state, the steel ball is clamped between the bottom surface of the lock core installation cavity and the limit plate; a notch is provided on the outer peripheral surface of the limit plate, and when the rotating side magnet drives the steel ball to move and align the steel ball with the notch, the end face magnet attracts the steel ball in the lock core part to cause the lock core column to compress the elastic element and the steel ball is located in the notch, and the tag is now in an unlocked state.

[0014] Technical Solution 2: A method for using an EAS tag with rotary unlocking, comprising a magnetic unlocking device composed of multiple side magnets and an end magnet, wherein the multiple side magnets can rotate synchronously. When the magnetic unlocking device is used to unlock, the shell is first placed on the magnetic unlocking device. At this time, the side magnets will attract the corresponding steel balls. Under the attraction of the corresponding side magnets, the steel balls are tightly attached to the inner wall of the lock core installation cavity and the steel balls are facing the corresponding side magnets. Then, the magnetic unlocking device rotates, and the multiple rotating side magnets will drive the corresponding steel balls to rotate synchronously. When the steel balls rotate to the bottom of the corresponding notch, the end magnets will drive the lock core column and the limit plate to move downward together to achieve unlocking.

[0015] Compared with the background technology, the present invention has the following advantages: first, a rotary unlocking EAS tag makes the steel ball become a separate locking piece, which not only greatly reduces the use of EAS tag mechanism assembly accessories, but also greatly simplifies the internal structure design of the EAS tag mechanism, while ensuring the use safety of the EAS tag mechanism, thereby improving the use stability of the entire mechanism, reducing the production cost of the entire mechanism, and ensuring the anti-theft security of the mechanism; second, the setting of the partition in the rotary unlocking EAS tag makes it have a better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the exploded structure of an EAS tag that rotates to unlock.

[0017] Figure 2 It is a cross-sectional structural diagram of an EAS tag (locked state) that is rotated to unlock.

[0018] Figure 3It is a schematic diagram of the structure after the lock core and the limit plate are assembled, viewed from above.

[0019] Figure 4 It is a schematic diagram of the top view of the lock core and the limit plate after assembly.

[0020] Figure 5 It is a cross-sectional structural diagram of an EAS tag (unlocked state) that is rotated to unlock.

[0021] Figure 6 The diagram is a cross-sectional view of an EAS tag with a rotary unlock function when placed on a magnetic unlock device (the magnetic unlock device is not rotating).

[0022] Figure 7 The diagram is a cross-sectional view of an EAS tag with a rotary unlock function when placed on a magnetic unlock device (after the magnetic unlock device is rotated).

[0023] Figure 8 It is a schematic diagram of the structure in which the side magnet attracts the steel balls in a disordered state.

[0024] Figure 9 It is a schematic diagram of the structure in which the side magnetic steel adjusts the disordered steel balls to an ordered state.

[0025] Figure 10 It is a structural diagram when the steel ball reaches the unlocking area driven by the rotating side magnet. DETAILED DESCRIPTION

[0026] Example 1: Refer to the attached Figures 1-10. A rotary unlocking EAS tag includes a shell 1, which is composed of an upper shell 15 and a lower shell 16. The upper shell 15 is provided with a through hole 14 for the anti-theft nail rod to pass through. One end of the through hole 14 is connected to the outside world and the other end is connected to the lock core installation cavity 11. After passing through the through hole 14, the nail rod of the anti-theft nail can enter the lock core hole of the lock core component 2 and the lock core component 2 can lock the nail rod of the anti-theft nail. A lock core component 2 is provided in the lock core installation cavity 11 in the shell 1, and a limit plate 3 is provided on the outer peripheral surface of the lock core column 23 in the lock core component 2. A steel ball 4 is provided in the lock core installation cavity 11. When the tag is in a locked state, the steel ball 4 is clamped between the bottom surface of the lock core installation cavity 11 and the limit plate 3; in the locked state: the steel ball 4 moves without restraint in the locking area, and the locking area is the area except the notch 31. At the same time, the limit plate 3 The upper and lower parts are constrained (the limit plate 3 is limited by the top wall of the lock core mounting cavity 11 on the upper side and by the steel ball 4 on the lower side). The limit plate 3 cannot move up and down through the clamping position of the steel ball 4. At the same time, the limit plate 3 and the lock core column 23 are fixed together, which also limits the lock core column 23 so that it cannot move up and down; a notch 31 is provided on the outer circumference of the limit plate 3. When the rotating side magnetic steel 5 drives the steel ball 4 to move and aligns the steel ball 4 with the notch 31, the end face magnetic steel 6 attracts the steel ball in the lock core part 2 to compress the elastic element 24 and the steel ball 4 is located in the notch 31. At this time, the tag is in the unlocked state; unlocked state: the steel ball is in the unlocking area, and the unlocking area is the area where the notch 31 is located. At this time, the limit plate 3 is not constrained up and down. Since there is no clamping position of the steel ball 4, the limit plate 3 and the lock core column 23 can move up and down.

[0027] The usage process of the present invention is as follows: 1. When the anti-theft nail is inserted into the EAS tag, the lock core component 2 will jam the anti-theft nail, preventing it from exiting the lock core part; 2. When using the magnetic unlocking device customized by our company (a magnetic unlocking device composed of multiple side magnetic steels 5 and an end magnetic steel 6, and the multiple side magnetic steels 5 can rotate synchronously), the steel ball 4 will enter an ordered state from a disordered state, that is, at this time the side magnetic steel 5 will attract the corresponding steel ball 4, and the steel ball 4 will be tightly attached to the inner wall of the lock core installation cavity 11 under the attraction of the corresponding side magnetic steel 5 and the steel ball 4 is facing the corresponding side magnetic steel 5, and then the magnetic unlocking device is rotated (the multiple rotating side magnetic steels 5 will drive the corresponding steel ball 4 to rotate synchronously), thereby bringing it into the unlocking area, that is, the steel ball 4 rotates to just below the corresponding notch 31; 3. The bottom magnetic steel adsorbs the limiter (that is, the end magnetic steel 6 will drive the lock core column 23 and the limit plate 3 to move downward together), thereby driving the lock core component 2 to unlock the anti-theft nail.

[0028] The inner wall surface of the lock core installation cavity 11 is a circular wall surface or an elliptical wall surface. The number of the steel balls 4 is multiple, preferably two. The outer peripheral surface of the limit plate 3 is provided with multiple notches 31, and the lower end surface of the limit plate 3 is divided into multiple steel ball separation areas by a partition 7, and each separation area is provided with a notch 31 and a steel ball 4. The partitions 7 are respectively located on one side of the opening corresponding to the notch 31. The bottom surface of the lock core installation cavity 11 is provided with an elastic element installation groove 12, and an annular baffle 13 is provided at the notch of the elastic element installation groove 12. The two side walls of the notch 31 are arranged in an "eight" shape, and the inner wall surface of the notch 31 is an outwardly convex arc surface.

[0029] The lock core 2 comprises a steel bowl 21, a plurality of steel balls 22, a lock cylinder 23, and an elastic element 24. The assembly of the steel bowl 21, the plurality of steel balls 22, the lock cylinder 23, and the elastic element 24 is conventional in the art and will not be described in detail here. The elastic element 24 is a spring; the preferred number of the steel balls 22 is three.

[0030] Example 2: Based on Example 1. A method for using a rotary unlocking EAS tag includes a magnetic unlocking device composed of multiple side magnets 5 and an end magnet 6. The multiple side magnets 5 can rotate synchronously. When the magnetic unlocking device is used to unlock, the shell 1 is first placed on the magnetic unlocking device. At this time, the side magnets 5 will attract the corresponding steel balls 4. Under the attraction of the corresponding side magnets 5, the steel balls 4 are tightly attached to the inner wall of the lock core installation cavity 11 and the steel balls 4 are facing the corresponding side magnets 5. That is, the steel balls 4 will be unlocked. The free disordered state becomes a diagonal ordered state (when there are two steel balls 4); then the magnetic unlocking device rotates, and multiple rotating side magnets 5 will drive the corresponding steel balls 4 to rotate synchronously. When the steel ball 4 rotates to the bottom of the corresponding notch 31, that is, when the steel ball 4 is rotated by the external unlocking device and brought into the corresponding unlocking area, the end face magnet 6 will drive the lock cylinder column 23 and the limit plate 3 to move downward together to achieve unlocking, that is, the lock cylinder column 23 and the limit plate 3 are sucked down by the external magnet, thereby achieving the purpose of unlocking.

[0031] When the housing 1 is removed from the magnetic unlocking device, the attractive force disappears, and the lock cylinder 23 and the limit plate 3 move upward together under the restoring force of the elastic element 24, thereby resetting the limit plate 3. After the limit element returns to its original position, the bottom space is exposed, and the steel ball 4 rolls to any position in the locking area. When the anti-theft nail is inserted into the EAS tag again, the lock cylinder 2 will block the nail, preventing it from exiting the lock cylinder.

[0032] It should be understood that although the above embodiments provide a relatively detailed textual description of the design ideas of the present invention, these textual descriptions are only simple textual descriptions of the design ideas of the present invention, rather than limitations on the design ideas of the present invention. Any combination, addition or modification that does not exceed the design ideas of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An EAS tag with a rotary unlocking function, comprising a housing (1), wherein a lock core component (2) is arranged in a lock core installation cavity (11) in the housing (1), and wherein: A limiting plate (3) is provided on the outer circumferential surface of the lock core column (23) in the lock core component (2), and a steel ball (4) is provided in the lock core installation cavity (11). When the tag is in a locked state, the steel ball (4) is clamped between the bottom surface of the lock core installation cavity (11) and the limiting plate (3); a notch (31) is provided on the outer circumferential surface of the limiting plate (3). When the rotating side magnetic steel (5) drives the steel ball (4) to move and align the steel ball (4) with the notch (31), the end magnetic steel (6) attracts the steel ball in the lock core component (2) to cause the lock core column (23) to compress the elastic element (24) and the steel ball (4) to be located in the notch (31). At this time, the tag is in an unlocked state.

2. The EAS tag with a rotary unlock function according to claim 1, characterized in that: The inner wall surface of the lock core installation cavity (11) is a circular wall surface or an elliptical wall surface.

3. The EAS tag with a rotary unlock function according to claim 1 or 2, characterized in that: The number of the steel balls (4) is plural, a plurality of notches (31) are provided on the outer peripheral surface of the limiting plate (3), and a plurality of steel ball separation zones are separated by a partition plate (7) at the lower end surface of the limiting plate (3), each separation zone being provided with a notch (31) and a steel ball (4).

4. The EAS tag with a rotary unlock function according to claim 3, characterized in that: The partition plates (7) are respectively located on one side of the opening of the corresponding notch (31).

5. The EAS tag with a rotary unlock function according to claim 3, characterized in that: The bottom surface of the lock core installation cavity (11) is provided with an elastic element installation groove, and an annular baffle is provided at the notch of the elastic element installation groove.

6. The EAS tag with a rotary unlock function according to claim 1, characterized in that: The lock core component (2) comprises a steel bowl (21), a plurality of steel balls (22), a lock core column (23) and an elastic element (24).

7. The EAS tag with a rotary unlock function according to claim 1, characterized in that: The side walls of the notch (31) are arranged in an "eight" shape, and the inner wall of the notch (31) is an outwardly convex arc surface.

8. A method for using a rotationally unlocked EAS tag, comprising a magnetic unlocker composed of a plurality of side magnetic steels (5) and an end magnetic steel (6), wherein the plurality of side magnetic steels (5) can rotate synchronously, and wherein: It also includes an EAS tag for rotating unlocking as described in any one of claims 1 to claim 7. When a magnetic unlocking device is used for unlocking, the shell (1) is first placed on the magnetic unlocking device. At this time, the side magnet (5) will attract the corresponding steel ball (4). Under the attraction of the corresponding side magnet (5), the steel ball (4) is tightly attached to the inner wall of the lock core installation cavity (11) and the steel ball (4) is facing the corresponding side magnet (5). Then, the magnetic unlocking device rotates, and the multiple rotating side magnets (5) will drive the corresponding steel balls (4) to rotate synchronously. When the steel ball (4) rotates to the bottom of the corresponding notch (31), the end magnet (6) will drive the lock core column (23) and the limit plate (3) to move downward together to achieve unlocking.

9. The method for using a rotary unlocking EAS tag according to claim 8, characterized in that: The housing (1) is removed from the magnetic unlocking device. As the attractive force disappears, the lock cylinder (23) and the limit plate (3) move upward together under the action of the restoring force of the elastic element (24), thereby resetting the limit plate (3).

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