TWI809433B - Double-sided auxiliary structure for proximity cards - Google Patents

Abstract

A double-sided auxiliary structure for proximity cards, which includes: a metal shielding layer; and two high magnetic permeability layers, respectively arranged on two opposite sides of the metal shielding layer, wherein the area of the metal shielding layer is larger than the two high The area of the magnetic layer. The double-sided auxiliary structure for proximity cards of the present invention improves the problem of poor success rate of multiple proximity cards.

Description

Double-sided auxiliary structure for proximity cards

The present invention relates to a proximity card, more particularly to a double-sided auxiliary structure for a proximity card.

Common proximity cards currently on the market, such as access control cards, leisure cards, credit cards, etc., are based on low-frequency and high-frequency radio frequency identification (Radio Frequency IDentification, RFID) systems or near-field communication (Near-field communication, NFC). signal transmission. And when two induction cards are very close to each other, there will be a problem of signal interference, resulting in failure of successful induction. There are two common card holders on the market that claim to be used for double-sided sensing. There are two methods: one is to block the sensing signal of the card on the opposite side through the metal shielding layer, but at the same time, the signal on the correct sensing side is interfered by the metal layer. Can not be successfully induced, resulting in induction failure. The other is to add an anti-magnetic sheet on the card, but it cannot effectively block the signal interference of the card on the opposite side, causing the reader to read multiple identical signals at the same time in a short period of time, resulting in induction failure.

Therefore, in order to solve various problems of conventional proximity cards, the present invention proposes a double-sided auxiliary structure for proximity cards.

In order to achieve the above purpose and other purposes, the present invention proposes a double-sided auxiliary structure for proximity cards, which includes: a metal shielding layer; and two high magnetic permeability layers, which are respectively arranged on opposite sides of the metal shielding layer, wherein , the area of the metal shielding layer is greater than the areas of the two high magnetic permeability layers.

In an embodiment of the present invention, at least one side of the metal shielding layer is longer than the two high magnetic permeability layers.

In an embodiment of the present invention, the area of the metal shielding layer is at least 30% larger than that of the two high magnetic permeability layers.

In an embodiment of the present invention, the area of the metal shielding layer is 30% to 70% larger than the areas of the two high magnetic permeability layers.

In an embodiment of the present invention, at least one side of the metal shielding layer is longer than corresponding sides of the two high magnetic permeability layers by more than 5 mm.

In an embodiment of the present invention, at least one side of the metal shielding layer is 5 mm to 10 mm longer than corresponding sides of the two high magnetic permeability layers.

In an embodiment of the present invention, at least one side of the metal shielding layer is 8 mm longer than corresponding sides of the two high magnetic permeability layers.

In an embodiment of the present invention, at least one side of the metal shielding layer is longer than corresponding sides of the two high magnetic permeability layers by more than 5%.

In an embodiment of the present invention, at least one side of the metal shielding layer is 5%-20% longer than corresponding sides of the two high magnetic permeability layers.

In one embodiment of the present invention, the two high magnetic permeability layers are closely combined with the metal shielding layer.

In an embodiment of the present invention, at least one of the high magnetic permeability layer and the metal shielding layer is separated by a certain distance.

In one embodiment of the present invention, the metal shielding layer includes two metal shielding bodies, and the two metal shielding bodies are spaced apart from each other and sandwiched to form an induction-proof space.

In one embodiment of the present invention, the material of the metal shielding layer is selected from at least one of aluminum, steel, iron, gold, silver, copper, and nickel, and the thickness of the metal shielding layer is 0.01mm˜3mm.

In one embodiment of the present invention, the magnetic permeability of the two high magnetic permeability layers is 10H/m-400H/m, and the thickness of the two high magnetic permeability layers is 0.05mm-2mm.

Thereby, the double-sided auxiliary structure for proximity cards of the present invention can greatly improve the sensing success rate of the proximity cards on both sides.

100: Double-sided auxiliary structure for proximity cards

100a: Double-sided auxiliary structure for proximity cards

1: Metal shielding layer

11: Metal shield

2: High magnetic permeability layer

C: proximity card

S: Anti-sensing space

FIG. 1 is a schematic cross-sectional view of a double-sided auxiliary structure of a proximity card according to a first embodiment of the present invention.

FIG. 2A is a front view of the double-sided auxiliary structure of the proximity card according to the first embodiment of the present invention.

2B is a front view of the double-sided auxiliary structure of the proximity card according to the second embodiment of the present invention.

3A is a schematic cross-sectional view of a double-sided auxiliary structure of a proximity card according to a third embodiment of the present invention.

3B is a schematic cross-sectional view of the double-sided auxiliary structure of the proximity card according to the fourth embodiment of the present invention.

4 is a schematic cross-sectional view of a double-sided auxiliary structure of a proximity card according to a fifth embodiment of the present invention.

In order to fully understand the present invention, the present invention will be described in detail by the following specific embodiments and accompanying drawings. Those skilled in the art can understand the purpose, features and effects of the present invention from the content disclosed in this specification. It should be noted that the present invention can be implemented through other different Embodiments are implemented or applied, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of the present invention. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the patent scope of the present invention. The instructions are as follows:

As shown in FIG. 1 , the double-sided auxiliary structure 100 for proximity cards according to the first embodiment of the present invention includes: a metal shielding layer 1 and two high magnetic permeability layers 2 .

The metal shielding layer 1 is a thin metal layer with the property of shielding electromagnetic wave transmission, and the material used can be at least one of metals such as aluminum, steel, iron, gold, silver, copper, nickel, and alloys, mixtures, Polymers, natural fibers, synthetic fibers, etc., and the present invention is not limited thereto, any metal material capable of shielding electromagnetic waves can be used as the metal shielding layer 1 of the present invention.

The two high magnetic permeability layers 2 are respectively disposed on two opposite sides of the metal shielding layer 1 . The high magnetic permeability layer 2 has excellent magnetic permeability, and the magnetic permeability is usually 10H/m~400H/m. The high magnetic permeability layer 2 can be an electromagnetic wave absorbing material, which has wide frequency absorption and absorbs large-angle incident waves, such as ferrite. And the present invention is not limited thereto, any material with excellent magnetic permeability can be used as the high magnetic permeability layer 2 of the present invention. In the present invention, the size of the high magnetic permeability layer 2 is approximately equal to the size of the commercially available proximity cards C (such as leisure cards, credit cards, etc.), but the present invention is not limited thereto.

As shown in FIG. 1 and FIG. 2A , when the area of the metal shielding layer 1 is slightly larger than the area of the two high magnetic permeability layers 2 , the sensing success rate of the proximity cards on both sides can be greatly improved. The slightly larger metal shielding layer 1 can effectively prevent external electromagnetic fields from entering the opposite side of the metal shielding layer 1, and can also prevent the induced electromagnetic field of the proximity card C from interfering with the opposite side, effectively suppressing signal interference from incorrect sensing surfaces. And the high magnetic permeability layer 2 can change the path of the magnetic flux, avoiding the induction electromagnetic field of the proximity card C from being interfered by the metal shielding layer 1, so that the reader can read smoothly Proximity card C achieves the effect of double-sided induction. Therefore, with the above structure, the double-sided auxiliary structure 100 for proximity cards of the present invention can improve the success rate of double-sided sensing.

As shown in FIG. 2A , in this embodiment, at least one side of the metal shielding layer 1 is longer than the two high magnetic permeability layers 2 . Preferably, at least one side is longer than the corresponding sides of the two high magnetic permeability layers 2 by more than 5mm, more preferably 5mm~10mm. If the metal shielding layer 1 is 5mm longer than the corresponding side of the high magnetic permeability layer 2, the success rate can be improved obviously, and the power is also increased with the increase of the length.

In this embodiment, the high magnetic permeability layer 2 is the size corresponding to the current standard ID cards such as leisure cards and credit cards. At this time, when the metal shielding layer 1 is 8mm longer than the corresponding side of the high magnetic permeability layer 2, the double-sided induction The success rate and material size utilization can be optimized. Yet the present invention is not limited thereto, when the size of the high magnetic permeability layer 2 or the double-sided auxiliary structure 100 for the proximity card of the present invention changes, it is not necessary that the metal shielding layer 1 is longer than the corresponding side of the high magnetic permeability layer 2 by 8mm most suitable value.

As shown in FIG. 2B , in the second embodiment of the present invention, each side of the metal shielding layer 1 is 5 mm to 10 mm longer than the corresponding side of the high magnetic permeability layer 2 . However, the present invention is not limited thereto. In other embodiments, any side or multiple sides may have a length difference. In other embodiments, at least one side of the metal shielding layer 1 is longer than the corresponding sides of the two high magnetic permeability layers 2 by more than 5%, more preferably 5%~20%, that is to say, the metal shielding layer 1 and the high magnetic permeability layer The length relationship of the magnetic layer 2 may be a ratio of dimensions, rather than a fixed numerical difference. In other embodiments, the area of the metal shielding layer 1 is at least 30% larger than the two high magnetic permeability layers 2 , preferably 30% to 70% larger.

In the first embodiment of the present invention, the two high magnetic permeability layers 2 are closely combined with the metal shielding layer 1 . However, the present invention is not limited thereto. As shown in FIG. 3A, at least one high magnetic permeability layer 2 of the third embodiment of the present invention is separated from the metal shielding layer 1 by a certain distance; and as shown in FIG. 3B, the fourth embodiment of the present invention In the example, the two high magnetic permeability layers 2 are separated from the metal shielding layer 1 by a certain distance. The high magnetic permeability layer 2 and the metal shielding layer 1 can be sandwiched There are skin layers, paper layers, other materials or air, that is to say, the double-sided auxiliary structure of the proximity card of the present invention is not limited to the fact that the high magnetic permeability layer 2 must be adjacent to the metal shielding layer 1 .

Further, in the fifth embodiment of the present invention, as shown in FIG. 4, the metal shielding layer 1 of the double-sided auxiliary structure 100a for the proximity card actually includes two metal shielding bodies 11, and the two metal shielding bodies 11 are spaced apart from each other by a certain distance. distance and form an anti-induction space S. Both sides of the anti-induction space S are metal shields 11, so electromagnetic waves cannot pass through the metal shields 11 and enter the anti-induction space S, so the anti-induction space S can be used to place any cards that do not want to be read. In other words, the double-sided auxiliary structure 100a for proximity cards of this embodiment can place commonly used proximity cards on both outer sides, and the anti-sensing space S formed on the inside can also place proximity cards that require higher security to prevent cards from It is stolen and read without authorization, so it has anti-theft function.

Furthermore, the double-sided auxiliary structure for proximity cards of the present invention can be used alone, or can be combined with other structures to be provided in card holders, wallets or wallets. For the convenience of use and portability, the thickness of the metal shielding layer 1 is preferably 0.01mm-3mm, and the thickness of the second high magnetic permeability layer 2 is 0.05mm-2mm.

The present invention has been disclosed by the embodiments above, but those skilled in the art should understand that the embodiments are only for describing the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiment should be included in the scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the patent application.

100: Double-sided auxiliary structure for proximity cards

1: Metal shielding layer

2: High magnetic permeability layer

C: proximity card

Claims (13)

A double-sided auxiliary structure for proximity cards, which includes: a metal shielding layer; and two high magnetic permeability layers, which are respectively arranged on two opposite sides of the metal shielding layer, and each of the two high magnetic permeability layers covers the opposite two sides The central area of the surface of the two high magnetic permeability layers, and the respective projections of the two high magnetic permeability layers are at least partially overlapped in the range of the metal shielding layer, wherein the area of the metal shielding layer is larger than the area of the two high magnetic permeability layers. The double-sided auxiliary structure for proximity cards as claimed in Claim 1, wherein at least one side of the metal shielding layer is longer than the two high magnetic permeability layers. The double-sided auxiliary structure for proximity cards according to claim 1 or 2, wherein the area of the metal shielding layer is at least 30% larger than the areas of the two high magnetic permeability layers. The double-sided auxiliary structure for proximity cards as claimed in claim 3, wherein the area of the metal shielding layer is 30% to 70% larger than the areas of the two high magnetic permeability layers. The double-sided auxiliary structure for proximity cards according to claim 1 or 2, wherein at least one side of the metal shielding layer is longer than the corresponding sides of the two high magnetic permeability layers by more than 5 mm. The double-sided auxiliary structure for proximity cards as claimed in claim 5, wherein at least one side of the metal shielding layer is 5 mm to 10 mm longer than the corresponding sides of the two high magnetic permeability layers. The double-sided auxiliary structure for proximity cards according to claim 1 or 2, wherein at least one side of the metal shielding layer is longer than the corresponding sides of the two high magnetic permeability layers by more than 5%. The double-sided auxiliary structure for proximity cards according to claim 7, wherein at least one side of the metal shielding layer is 5%-20% longer than the corresponding sides of the two high magnetic permeability layers. The double-sided auxiliary structure for proximity cards as claimed in claim 1, wherein the two high magnetic permeability layers are closely combined with the metal shielding layer. The double-sided auxiliary structure for a proximity card as claimed in claim 1, wherein at least one of the high magnetic permeability layer and the metal shielding layer is separated by a certain distance. The double-sided auxiliary structure for proximity cards as claimed in claim 1, wherein the metal shielding layer includes two metal shielding bodies, and the two metal shielding bodies are sandwiched at a certain distance from each other to form an anti-induction space. The double-sided auxiliary structure for proximity card as described in claim 1, wherein the material of the metal shielding layer is selected from at least one of aluminum, steel, iron, gold, silver, copper, nickel, the thickness of the metal shielding layer 0.01mm~3mm. The double-sided auxiliary structure for induction cards as described in claim 1, wherein the magnetic permeability of the two high magnetic permeability layers is 10H/m~400H/m, and the thickness of the two high magnetic permeability layers is 0.05mm~2mm .

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