CN220252676U - Anti-theft tag capable of reducing metal interference - Google Patents
Anti-theft tag capable of reducing metal interference Download PDFInfo
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- CN220252676U CN220252676U CN202320689914.8U CN202320689914U CN220252676U CN 220252676 U CN220252676 U CN 220252676U CN 202320689914 U CN202320689914 U CN 202320689914U CN 220252676 U CN220252676 U CN 220252676U
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- Prior art keywords
- amorphous
- bias
- magnetic sensor
- tamper
- sensor body
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 230000005291 magnetic effect Effects 0.000 claims abstract description 73
- 238000004806 packaging method and process Methods 0.000 claims abstract description 30
- 239000002390 adhesive tape Substances 0.000 claims description 15
- 239000000696 magnetic material Substances 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 5
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000003302 ferromagnetic material Substances 0.000 abstract description 13
- 238000001514 detection method Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Abstract
The utility model discloses an anti-theft tag capable of reducing metal interference, which comprises an acoustic magnetic sensor body, wherein the side wall surface of the acoustic magnetic sensor body is adhered to a commodity packaging container made of ferromagnetic materials; the acoustic magnetic sensor body comprises a shell, and an accommodating cavity is formed in the shell; the amorphous resonant piece is arranged in the accommodating cavity; and the bias magnet is arranged in the shell or outside the shell so as to provide a bias magnetic field for the amorphous resonant sheet. The side wall surface of the acoustic magnetic sensor body is adhered to the commodity packaging container made of the ferromagnetic material, so that the top surface and the bottom surface of the acoustic magnetic sensor body are suspended relative to the commodity packaging container, and therefore, magnetic force lines of a bias magnetic field generated by the bias magnet can be prevented from passing through the commodity packaging container made of the ferromagnetic material in a large amount, the commodity packaging container is prevented from influencing the bias magnetic field generated by the bias magnet, and the normal operation of the acoustic magnetic sensor body is ensured.
Description
Technical Field
The utility model relates to the field of anti-theft labels, in particular to an anti-theft label capable of reducing metal interference.
Background
The acoustic magnetic sensor is generally used for anti-theft of goods, and as shown in fig. 1, is mainly composed of a housing 10, a resonator plate 20 operating at a set resonance frequency (generally 58 khz), and a bias magnetic plate 30 providing a bias magnetic field for resonance of the resonator plate 20. The resonator plate 20 and the bias magnet plate 30 are both disposed in a hollow cavity 100 provided in the casing 10, and a double-sided tape 50 bonded to the product container 40 is further provided on the bottom surface of the casing 10.
The anti-theft working principle of the acoustic magnetic sensor is as follows: the acoustic magnetic sensor is adhered to the protected commodity container 40 through the double faced adhesive tape 50, and after a customer purchases a commodity adhered with the acoustic magnetic sensor in a store, the commodity needs to be correspondingly processed by a cashier at a cash register (for example, the cashier removes the acoustic magnetic sensor from the commodity or deactivates the acoustic magnetic sensor to deactivate the acoustic magnetic sensor), so that the customer cannot be detected by the anti-theft detection device to trigger an alarm when the customer passes through a detection area of the store with the commodity; if the commodity is carried away by the customer without the corresponding treatment of the cashier staff, when the commodity passes through the detection area, the resonant chip 20 of the acoustic magnetic sensor on the commodity receives an electromagnetic wave signal emitted by the antenna of the anti-theft detection device, and the signal frequency of the electromagnetic wave signal is basically consistent with the resonant frequency of the resonant chip, so that the resonant chip 20 resonates at the resonant frequency under the action of the bias magnetic field of the bias magnetic sheet 30, and returns an electromagnetic wave signal corresponding to the resonant frequency to the antenna of the anti-theft detection device, so that the anti-theft detection device detects and triggers an alarm, and the anti-theft of the commodity is realized.
The present inventors have found that in the process of implementing the present utility model, the following technical problems exist in the prior art: when the acoustic magnetic sensor is fixed on the surface of a ferromagnetic commodity or iron packages of the commodity, the acoustic magnetic sensor cannot work normally and fails. The inventors have conducted intensive studies and found that the cause of failure is: the bias magnetic field generated by the bias magnetic sheet of the acoustic magnetic sensor is weakened by the magnetic conduction of the ferromagnetic commodity surface or the iron package (namely, the ferromagnetic commodity surface or the iron package is used as a bias magnetic field interference source to interfere with the bias magnetic field), and the weakened bias magnetic field causes the resonance frequency of the resonance sheet to be greatly shifted (away from 58 khz), so that the acoustic magnetic sensor cannot work normally and fails.
Accordingly, the prior art has drawbacks and needs improvement.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: an anti-theft label for reducing metal interference is provided, which can be fixed on a commodity packaging container made of ferromagnetic material to work normally.
The technical scheme of the utility model is as follows: an anti-theft tag for reducing metal interference includes an acoustic magnetic sensor body;
wherein the acoustic magnetic sensor body comprises
The shell is internally provided with an accommodating cavity;
the amorphous resonant piece is arranged in the accommodating cavity;
the bias magnet is arranged in the shell or outside the shell so as to provide a bias magnetic field for the amorphous resonant sheet;
and any side wall of the shell is provided with an adhesive tape layer adhered to the commodity packaging container.
By adopting the technical scheme, in the anti-theft tag for reducing metal interference, the top end inside the shell is provided with a first accommodating cavity, the bias magnet is arranged in the first accommodating cavity, the bottom end inside the shell is provided with a second accommodating cavity, and the amorphous resonant sheet is arranged in the second accommodating cavity.
By adopting the technical schemes, in the anti-theft tag for reducing metal interference, the central axis of the amorphous resonant piece and the central axis of the bias magnet are positioned on the same vertical plane.
By adopting the technical schemes, in the anti-theft label for reducing metal interference, the adhesive tape layer is one of self-adhesive, foam adhesive and VHB adhesive tape.
By adopting the technical schemes, in the anti-theft tag for reducing metal interference, the bias magnet is made of soft magnetic material or semi-hard magnetic material.
By adopting the technical schemes, in the anti-theft tag for reducing metal interference, the bias magnet is made of hard magnetic material.
By adopting the technical schemes, in the anti-theft tag for reducing metal interference, the bias magnet comprises a permanent magnet, a first magnetizer and a second magnetizer, and the first magnetizer and the second magnetizer are respectively and mutually adsorbed and connected with the N-terminal and the S-terminal of the permanent magnet.
By adopting the technical schemes, in the anti-theft tag for reducing metal interference, the permanent magnet is made of neodymium iron boron permanent magnet material, and the permanent magnet is cylindrical or cuboid.
By adopting the technical schemes, in the anti-theft tag for reducing metal interference, the number of the amorphous resonant sheets is more than two, and the amorphous resonant sheets are respectively arranged in the second accommodating cavity in an up-down layered manner.
By adopting the technical schemes, in the anti-theft tag for reducing metal interference, the commodity packaging container is of a square structure.
Compared with the prior art, the utility model bonds the side wall surface of the acoustic magnetic sensor body on the commodity packaging container made of ferromagnetic materials so as to suspend the top surface and the bottom surface of the acoustic magnetic sensor body, and the arrangement can prevent the magnetic force lines of the bias magnetic field generated by the bias magnet from greatly passing through the commodity packaging container made of ferromagnetic materials, and avoid the commodity packaging container from influencing the bias magnetic field generated by the bias magnet, thereby not influencing the resonance work of the amorphous resonant sheet (namely, not greatly shifting the resonance frequency of the amorphous resonant sheet), and ensuring the normal work of the acoustic magnetic sensor body.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present application, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art acousto-optic sensor body secured to a commercial packaging container made of ferromagnetic material;
fig. 2 is a schematic view of a first structure of an acoustic magnetic sensor body according to an embodiment of the present utility model fixed to a commodity packaging container made of ferromagnetic material;
fig. 3 is a schematic diagram of a second structure in which an acoustic magnetic sensor body according to an embodiment of the present utility model is fixed to a commodity packaging container made of ferromagnetic material;
fig. 4 is a schematic diagram of a connection structure between an acoustic magnetic sensor body and an adhesive tape layer according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of an exploded structure of an acoustic magnetic sensor body according to an embodiment of the present utility model.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present patent application. Accordingly, the following detailed description of the embodiments of the present patent application, as provided in the accompanying drawings, is not intended to limit the scope of the claimed patent application, but is merely representative of selected embodiments of the present patent application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present patent application.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "inside", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
As shown in fig. 2 to 5, the present embodiment provides an anti-theft tag for reducing metal interference, including an acoustic magnetic sensor body 2;
wherein the acoustic magnetic sensor body 2 comprises
A housing 21, wherein an accommodating chamber is arranged in the housing 21;
an amorphous resonator 22, wherein the amorphous resonator 22 is disposed in the accommodating chamber;
a bias magnet 23, wherein the bias magnet 23 is disposed inside the housing 21 or outside the housing 21 to provide a bias magnetic field for the amorphous resonator plate 22.
The case 21 is provided with a tape layer 3 on either side wall thereof, which is adhered to the commodity packaging container 1. In this embodiment, the commodity packaging container 1 is made of ferromagnetic material, the left side wall surface of the acoustic magnetic sensor body 2 is provided with the adhesive tape layer 3, and the adhesive tape layer 3 is adhered to the commodity packaging container 1, so that the top surface and the bottom surface of the acoustic magnetic sensor body 2 are suspended relative to the commodity packaging container 1, and by this arrangement, the magnetic force lines of the bias magnetic field generated by the bias magnet 23 can be prevented from passing through the commodity packaging container 1 made of ferromagnetic material in a large amount, the bias magnetic field generated by the bias magnet 23 is prevented from being influenced by the commodity packaging container 1, and thus the resonance work of the amorphous resonant sheet 22 is not influenced (i.e. the resonance frequency of the amorphous resonant sheet is not greatly deviated), and the normal work of the acoustic magnetic sensor body 2 is ensured. When a customer passes through the detection area, the amorphous resonator plate 22 of the acoustic magnetic sensor body 2 receives an electromagnetic wave signal emitted from the receiving antenna, and the signal frequency of the electromagnetic wave signal is consistent with the resonance frequency of the amorphous resonator plate 22, so that the amorphous resonator plate 22 resonates at the resonance frequency under the action of the bias magnetic field of the bias magnet 23, and returns an electromagnetic wave signal corresponding to the resonance frequency to the antenna of the detection area, thereby triggering an alarm. In this embodiment, the operating frequency of the acoustic magnetic sensor body 2 is 58KHz. Of course, the right side wall surface, the front side wall surface, or the rear side wall surface of the acoustic-magnetic sensor main body 2 may be bonded to the commodity packaging container 1, and the present utility model is not limited thereto.
Further, a first accommodating cavity 211 is provided at the top end of the interior of the housing 21, the bias magnet 23 is disposed in the first accommodating cavity 211, a second accommodating cavity 212 is provided at the bottom end of the interior of the housing 21, and the amorphous resonator plate 22 is disposed in the second accommodating cavity 212. The arrangement of the first accommodating cavity 211 and the second accommodating cavity 212 can facilitate the fixed placement of the bias magnet 23 and the amorphous resonant piece 22 on the magneto-acoustic sensor body 2, thereby improving the internal assembly stability of the magneto-acoustic sensor body 2.
Further, the central axis of the amorphous resonant plate 22 and the central axis of the bias magnet 23 are located on the same vertical plane. By the arrangement, the bias magnetic field generated by the bias magnet 23 can be uniformly distributed around the amorphous resonator plate 22, so that the amorphous resonator plate 22 can better realize resonance under the action of the bias magnetic field.
Further, the adhesive tape layer 3 is one of self-adhesive glue, foam glue and VHB adhesive tape. In this embodiment, the adhesive tape layer 3 is a VHB adhesive tape, which has good weather resistance and strong resistance to damage by ultraviolet rays and chemical agents, and the side wall of the case 21 is adhered to the commodity packaging container 1 by the VHB adhesive tape, so that the adhesion durability between the acoustic magnetic sensor body 2 and the commodity packaging container 1 can be improved, and the reliability is high, and the acoustic magnetic sensor is not easy to fall off.
Further, the bias magnet 23 is made of hard magnetic material. In this embodiment, the bias magnet 23 is made of a hard magnetic material. Of course, it should be noted that the bias magnet 23 may also be made of soft magnetic material or semi-hard magnetic material, which is not limited thereto.
Further, the bias magnet 23 includes a permanent magnet 230, a first magnetizer 231 and a second magnetizer 232, and the first magnetizer 231 and the second magnetizer 232 are respectively and mutually attracted to the N-pole and S-pole of the permanent magnet 230.
Further, the permanent magnet 230 is made of a neodymium iron boron permanent magnet material, and the permanent magnet 230 is cylindrical or rectangular. In this embodiment, the permanent magnet 230 is cylindrical, and since the permanent magnet 230 is made of a neodymium-iron-boron permanent magnet material, it can ensure that the permanent magnet 230 has a very high coercive force and can generate a very strong magnetic field, so that the anti-theft performance of the bias magnet 23 can effectively resist the interference of the external strong magnetic field. Of course, it should be noted that the permanent magnet 230 may be made of other permanent magnetic materials, which is not limited herein.
Further, the number of the amorphous resonant sheets 22 is more than two, and the amorphous resonant sheets are respectively arranged in the second accommodating cavity 212 in a vertically layered manner.
Further, the commodity packaging container 1 has a square structure. The square-shaped commodity packaging container 1 can facilitate the adhesion and fixation of the acoustic magnetic sensor body 2.
Compared with the prior art, the utility model bonds the side wall surface of the acoustic magnetic sensor body on the commodity packaging container made of ferromagnetic materials so as to suspend the top surface and the bottom surface of the acoustic magnetic sensor body, and the arrangement can prevent the magnetic force lines of the bias magnetic field generated by the bias magnet from greatly passing through the commodity packaging container made of ferromagnetic materials, and avoid the commodity packaging container from influencing the bias magnetic field generated by the bias magnet, thereby not influencing the resonance work of the amorphous resonant sheet (namely, not greatly shifting the resonance frequency of the amorphous resonant sheet), and ensuring the normal work of the acoustic magnetic sensor body.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. An anti-theft tag for reducing metal interference, characterized in that: comprises an acoustic magnetic sensor body,
wherein the acoustic magnetic sensor body comprises
The shell is internally provided with an accommodating cavity;
the amorphous resonant piece is arranged in the accommodating cavity;
the bias magnet is arranged in the shell or outside the shell so as to provide a bias magnetic field for the amorphous resonant sheet;
and any side wall of the shell is provided with an adhesive tape layer adhered to the commodity packaging container.
2. The tamper-resistant tag of claim 1, wherein: the top inside the casing is equipped with first holding chamber, the biasing magnet is located first holding intracavity, the inside bottom of casing is equipped with the second holding chamber, the amorphous resonance piece is located the second holding intracavity.
3. The tamper-resistant tag of claim 1, wherein: the central axis of the amorphous resonant piece and the central axis of the bias magnet are positioned on the same vertical plane.
4. The tamper-resistant tag of claim 1, wherein: the adhesive tape layer is one of self-adhesive, foam adhesive and VHB adhesive tape.
5. The tamper-resistant tag of claim 1, wherein: the bias magnet is a soft magnetic material or a semi-hard magnetic material.
6. The tamper-resistant tag of claim 1, wherein: the bias magnet is a hard magnetic material.
7. The tamper-resistant tag of claim 6, wherein: the bias magnet comprises a permanent magnet, a first magnetizer and a second magnetizer, and the first magnetizer and the second magnetizer are respectively and mutually adsorbed and connected with the N pole end and the S pole end of the permanent magnet.
8. The tamper-resistant tag of claim 7, wherein: the permanent magnet is made of neodymium iron boron permanent magnet materials, and is cylindrical or cuboid.
9. The tamper-resistant tag of claim 2, wherein: the number of the amorphous resonant sheets is more than two, and the amorphous resonant sheets are respectively arranged in the second accommodating cavity in an up-down layered manner.
10. The tamper-resistant metallic interference reducing tag of any one of claims 1 to 9, wherein: the commodity packaging container is of a square structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320689914.8U CN220252676U (en) | 2023-03-31 | 2023-03-31 | Anti-theft tag capable of reducing metal interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320689914.8U CN220252676U (en) | 2023-03-31 | 2023-03-31 | Anti-theft tag capable of reducing metal interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220252676U true CN220252676U (en) | 2023-12-26 |
Family
ID=89229376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320689914.8U Active CN220252676U (en) | 2023-03-31 | 2023-03-31 | Anti-theft tag capable of reducing metal interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220252676U (en) |
-
2023
- 2023-03-31 CN CN202320689914.8U patent/CN220252676U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |