Low-cost high-performance EAS anti-theft label

Abstract

The utility model belongs to the field of EAS labels, particularly relates to a low-cost and high-performance EAS anti-theft label, and provides the following scheme aiming at the problems that an existing circuit made of an aluminum foil of more than 80u is not favorable for controlling the purchase cost of the aluminum foil, and a circuit made of an aluminum foil of less than 60u cannot meet the use requirements of customers due to the fact that the performance is greatly reduced. The paper comprises a surface layer, a bottom paper layer and an inner layer, the inner layer comprises a coil layer, a capacitor layer and a dielectric layer, the coil layer, the capacitor layer and the dielectric layer are bonded through adhesive layers, and the coil layer is located above the capacitor layer. The low-cost high-performance EAS anti-theft label solves the problem that the circuit performance is reduced due to the fact that the thickness of a conductor of a used circuit is reduced and the resistance is increased, and is provided with a protective layer (a coil surface or a capacitor surface) in the design of forming an external capacitor through overturning, so that the circuit is prevented from being damaged in the process of overturning.

Description

Technical Field

[0001] The utility model relates to the technical field of EAS labels, in particular to a low-cost and high-performance EAS anti-theft label. Background Art

[0002] The main production cost of EAS tags comes from the aluminum foil used to make conductor circuits. Circuits made of thicker aluminum foil have lower resistance and therefore better circuit performance. Traditionally, circuits made of aluminum foil above 80u are not conducive to controlling the purchase cost of aluminum foil, while circuits made of aluminum foil below 60u cannot meet customer requirements due to a significant drop in performance. Therefore, we propose a low-cost, high-performance EAS anti-theft tag to solve the above-mentioned problems. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings in the prior art that using aluminum foil above 80u to make circuits is not conducive to controlling the purchase cost of aluminum foil, and that circuits made of aluminum foil below 60u cannot meet the requirements of customers due to a significant decrease in performance, and to propose a low-cost and high-performance EAS anti-theft tag.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A low-cost and high-performance EAS anti-theft label comprises a surface layer, a base paper layer and an inner layer;

[0006] The inner layer includes a coil layer, a capacitor layer and a dielectric layer, and each layer is bonded by a glue layer. The coil layer is located above the capacitor layer, and the dielectric layer is located between the capacitor layers.

[0007] The coil layer is composed of a coil layer capacitor plate and a coil connected thereto to form a circuit;

[0008] The capacitor layer is composed of a main capacitor and a capacitor layer coil connected thereto;

[0009] The coil is arranged in a surrounding manner to increase the cross-sectional area;

[0010] The bottom paper layer includes a second aluminum foil and a first aluminum foil, the first aluminum foil is located above the coil layer capacitor plate, the second aluminum foil is located below the first aluminum foil, and the thickness of the second aluminum foil and the first aluminum foil is less than 60μ.

[0011] In one possible design, optional additional supporting layers are provided inside or outside the individual layers.

[0012] In a possible design, the base paper layer includes a second aluminum foil and a first aluminum foil, the first aluminum foil is located above the capacitor plate of the coil layer, and the second aluminum foil is located below the first aluminum foil.

[0013] In a possible design, the second aluminum foil is adhered to the surface of the coil layer capacitor plate through the second adhesive layer, and the first aluminum foil is adhered to the surface of the coil layer capacitor plate through the first adhesive layer.

[0014] In a possible design, the surface layer includes a protective layer, and the protective layer is located below the second aluminum foil.

[0015] In a possible design, the protective layer is adhered to the surface of the second aluminum foil through a third adhesive layer.

[0016] In a possible design, a receiving cavity for use with the coil is provided inside the coil layer capacitor plate.

[0017] In this application, a design of flipping an external capacitor is provided, which achieves better performance by flipping the internal capacitor to form an external capacitor. The calculation formula of inductance L = (μ 0 *μr*N 2 *A) / l. Where L is the inductance (unit: Henry), μ 0 is the magnetic permeability in vacuum (approximately 4π*10 -7 H / m), μr is the relative magnetic permeability of the coil, N is the number of turns of the coil, and A is the cross-sectional area of ​​the coil. The design of the built-in flip-formed external capacitor has a larger coil cross-sectional area than the ordinary external capacitor design. Therefore, the design requires fewer coil turns to obtain the same inductance, which reduces the resistance of the coil. Therefore, the design of flip-formed external capacitor can obtain better performance. The use of aluminum foil with a thickness of less than 60u to produce flip-formed external capacitor labels has slightly better performance than traditional labels made of aluminum foil with a thickness of more than 80u.

[0018] Beneficial effects:

[0019] In the utility model, the low-cost and high-performance EAS anti-theft tag provides an external capacitor tag design, which has better tag theoretical performance than the internal capacitor to solve the problem of reduced circuit performance caused by increased resistance due to reduced thickness of the circuit conductor.

[0020] In the utility model, the low-cost and high-performance EAS anti-theft tag is provided with a protective layer (coil surface or capacitor surface) in the design of flipping to form an external capacitor, so as to prevent the circuit from being damaged during the reversal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional structural schematic diagram of a low-cost and high-performance EAS anti-theft tag proposed by the utility model;

[0022] Figure 2This is a schematic diagram of the three-dimensional structure of the coil layer capacitor plate in a low-cost and high-performance EAS anti-theft tag proposed by the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the coil and the capacitor layer coil in a low-cost, high-performance EAS anti-theft tag proposed by the utility model.

[0024] In the figure: 1. first aluminum foil; 2. first adhesive layer; 3. coil layer capacitor plate; 4. second adhesive layer; 5. second aluminum foil; 6. third adhesive layer; 7. protective layer; 8. accommodating cavity; 9. coil; 10. capacitor layer coil; 11. main capacitor. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example 1

[0027] Reference Figure 1-3 , a low-cost and high-performance EAS anti-theft label, which is used in the field of EAS labels, including: a surface layer, a base paper layer and an inner layer;

[0028] The bottom paper layer includes a second aluminum foil 5 and a first aluminum foil 1, the first aluminum foil 1 is located above the coil layer capacitor plate 3, the second aluminum foil 5 is located below the first aluminum foil 1, the second aluminum foil 5 is adhered to the surface of the coil layer capacitor plate 3 through the second adhesive layer 4, and the first aluminum foil 1 is adhered to the surface of the coil layer capacitor plate 3 through the first adhesive layer 2;

[0029] The surface layer includes a protective layer 7, the protective layer 7 is located below the second aluminum foil 5, and the protective layer 7 is adhered to the surface of the second aluminum foil 5 through a third adhesive layer 6;

[0030] The inner layer includes a coil layer, a capacitor layer and a dielectric layer. The layers are bonded by a glue layer. The coil layer is located above the capacitor layer, and the dielectric layer is located between the capacitor layers.

[0031] The coil layer is composed of a coil layer capacitor plate 3 and a coil 9 connected thereto to form a circuit. The design of the external capacitor formed by internal flipping has a larger coil cross-sectional area than that of the ordinary external capacitor design. Therefore, the number of coil turns required to obtain the same inductance is less in design, thereby reducing the resistance of the coil.

[0032] The capacitor layer is composed of a main capacitor 11 and a capacitor layer coil 10 connected thereto;

[0033] The coil 9 is arranged in a surrounding manner to increase the cross-sectional area;

[0034] The bottom paper layer includes a second aluminum foil 5 and a first aluminum foil 1, wherein the first aluminum foil 1 is located above the capacitor plate 3 of the coil layer, and the second aluminum foil 5 is located below the first aluminum foil 1, and the thickness of the second aluminum foil 5 and the first aluminum foil 1 is less than 60μ;

[0035] Optional additional support layers are provided inside or outside each layer.

[0036] Example 2

[0037] refer to Figure 1-3 , based on the improvement of Example 1: a receiving cavity 8 for use with the coil 9 is provided inside the coil layer capacitor plate 3 .

[0038] However, as is well known to those skilled in the art, the working principle and wiring method of the main capacitor 11 of the coil layer capacitor plate 3 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-cost and high-performance EAS anti-theft tag, characterized in that: Including surface layer, base paper layer and inner layer; The inner layer includes a coil layer, a capacitor layer and a dielectric layer, and each layer is bonded by a glue layer. The coil layer is located above the capacitor layer, and the dielectric layer is located between the capacitor layers. The coil layer is composed of a coil layer capacitor plate (3) and a coil (9) integrally connected thereto to form a circuit; The capacitance layer is composed of a main capacitor (11) and a capacitance layer coil (10) integrally connected thereto; The coil (9) is arranged in a surrounding manner to increase the cross-sectional area; The base paper layer comprises a second aluminum foil (5) and a first aluminum foil (1), wherein the first aluminum foil (1) is located above the coil layer capacitor plate (3), and the second aluminum foil (5) is located below the first aluminum foil (1), and the thickness of the second aluminum foil (5) and the first aluminum foil (1) is less than 60 μ.

2. A low-cost and high-performance EAS anti-theft tag according to claim 1, characterized in that: Optional additional support layers are provided inside or outside each layer.

3. A low-cost and high-performance EAS anti-theft tag according to claim 1, characterized in that: The second aluminum foil (5) is adhered to the surface of the coil layer capacitor plate (3) via the second adhesive layer (4), and the first aluminum foil (1) is adhered to the surface of the coil layer capacitor plate (3) via the first adhesive layer (2).

4. A low-cost and high-performance EAS anti-theft tag according to claim 1, characterized in that: The surface layer comprises a protective layer (7), and the protective layer (7) is located below the second aluminum foil (5).

5. A low-cost and high-performance EAS anti-theft tag according to claim 4, characterized in that: The protective layer (7) is adhered to the surface of the second aluminum foil (5) via the third adhesive layer (6).

6. A low-cost and high-performance EAS anti-theft tag according to claim 1, characterized in that: The coil layer capacitor plate (3) is provided with a receiving cavity (8) for use with the coil (9).

Images