TWM448026U - Non-contact card reading device and antenna structure thereof - Google Patents

Description

Non-contact card reading device and antenna structure thereof

The present invention relates to a card reading device and an antenna structure thereof, and particularly to a contactless card reading device and an antenna structure thereof that reduce load effects.

With the development of technology, health insurance cards, credit cards, financial cards, identity cards, passports, etc., which are used in daily life, have been developed into magnetic strips or digital identification cards for IC chips. The individual data of the user is recorded on the digital identification card. For example, the contactless pay-to-board system used by the ticket system. In recent years, as the technology of wireless frequency identification systems (RFID) has matured, many credit cards and financial cards have appeared on the market in the form of contactless cards. The user can trade only by sensing the contactless card on the contactless card reading device. In this way, the transaction time is greatly shortened, and the user does not have to worry about leaving the card in the contact card reader forgotten to take away, causing the card to be lost. Because the electromagnetic induction method is adopted, the non-contact card reading device is relatively easily interfered by the external material of the position of the card reader device, especially the material of the metal casing, which causes the antenna load to change, and the signal load modulation shift is excessive. The design uses an acrylic carrier on the back of the antenna to increase the gap and then attaches the absorbing plate. After the solar panel, the absorbing material is used to reduce the load effect, so that the magnetic flux can be reduced by the metal casing, thereby reinforcing the card reading. The energy provided by the machine to the contactless card.

Because the magnetic field emitted by the reader antenna will produce different changing magnetic fields due to the different materials or different shapes of the metal and generate (eddy current Eddy current) and according to the law of cold law (Lenz "s Law" will produce back electromotive force will The antenna of the card reader produces different loading effects, which makes it impossible to correctly read the signal transmitted by the card. The electromagnetic wave commonly used by the antenna to resist metal interference is commonly used. The absorbing material can only be used for the matched antenna, and cannot be considered in different installation environments (such as the metal material and appearance of the device), so it can only be used for fixed metal materials and shapes. When the device is in a metal case with different appearances, the antenna matching needs to be re-adjusted, otherwise the card reading failure may occur.

In view of this, the present invention provides an antenna structure, comprising: a carrier board comprising a first surface and a second surface, the first surface has a first recess, the second surface has a second recess; the antenna, a portion of which is located on the first side The first recess, the other portion is exposed on the carrier plate; and the electromagnetic wave absorbing member is located in the second recess of the second surface, and the electromagnetic wave absorbing member is spaced apart from the antenna by the carrier plate at a distance.

This creation separates the antenna from the metal plate by the carrier board, so that the influence of the load effect caused by the metal interference is reduced, and the electromagnetic wave interference from other possible devices behind the non-contact card reading device is blocked, and then the electromagnetic wave absorbing material will be The interference of the modulated signal is minimal, so that it does not affect the card reading error regardless of the metal casing of the device. In addition, the creation can generate the required power via visible light, significantly reducing the cost of electricity required for its use.

The detailed features and advantages of the present invention are described in detail below in the embodiments, which are sufficient to enable any skilled artisan to understand the technical contents of the present invention and implement it according to the contents, the scope of the patent application and the drawings. Anyone familiar with the relevant art can easily understand the purpose and advantages of this creation.

Please refer to Figure 1 for the system block diagram of this creation. Taking the contactless card reading device 1 embedded in the host 50 as an example, the host 50 is here a ticket stored value device. The user brings the contactless card closer to the contactless card reading device 1, wherein the contactless card contains a non-contact wafer. Which is not The contact chip is a radio frequency identification (RFID) chip, and the contactless card is selected from the group consisting of a ticket, a cash card, a financial card, and a credit card. The non-contact wafer transmits the first analog signal by generating current due to electromagnetic induction and actuating the non-contact wafer. When the antenna 12 receives the first analog signal, the contactless card reading device 1 has a conversion module 20 that can transmit the first analog signal to the conversion module 20. The conversion module 20 converts the first analog signal into a first digital signal. In addition, the contactless card reading device 1 further has a control unit 30 and an interface unit 40. The control unit 30 receives the first digital signal and transmits it to the interface unit 40. Here, the interface unit 40 is selected from the group consisting of a recommendation standard 232 (RS232) interface, a universal serial bus (USB) interface, and a portable universal serial bus (USB OTG) interface standard interface. The interface unit 40 transmits the first digital signal to the host 50.

Please refer to Figure 2 and Figure 3 for a schematic diagram and an exploded view of the creation. In this embodiment, the non-contact card reading device 1 can be mainly composed of the antenna structure 10, the base portion 71 and the upper cover 72, wherein the base portion 71 can be rectangular, with a receiving portion 711 in the middle for carrying the antenna structure 10; The upper cover 72 may have a rectangular shape and cover the receiving portion 711 to be combined with the base portion 71 to cover the antenna structure 10.

Please refer to FIG. 4A for a schematic diagram of the antenna structure. The antenna structure 10 can be mainly composed of a carrier board 11, an antenna 12, and an electromagnetic wave absorbing element 13. The carrier board 11 has a first surface 11a and a second surface 11b opposite to each other, wherein the carrier board 11 can be made of a light transmissive material, and the first surface 11a can be a card sensing surface and can be provided around the first surface 11a. The first groove 111 of the circumference, the second surface 11b may be a card sensing surface, and may be provided with a second groove 112 surrounding the circumference of the second surface 11b (as shown in FIG. 2B), where the first concave The groove 111 is disposed corresponding to the second groove 112. Moreover, the antenna 12 is disposed in the first recess 111 of the first surface 11a for receiving the first of the contactless card Analog signal and transmit a second analog signal to a contactless card. When the user holds the non-contact card to the first surface 11a, the electromagnetic field generated by the antenna 12 activates the non-contact wafer inside the non-contact card, and the non-contact wafer is activated by the electromagnetic field to transmit the first analog signal, and the antenna 12 The first analog signal is received and transmitted to the conversion module 20. The conversion module 20 converts the first analog signal into a first digital signal. Control unit 30 receives the first digital signal and transmits it to interface unit 40. The interface unit 40 transmits the first digital signal to the host 50 for operation (as shown in FIG. 1).

Please refer to FIG. 4B for a schematic view of another perspective of the antenna structure. The electromagnetic wave absorbing element 13 is disposed in the second groove 112 of the second surface 11b. The electromagnetic wave absorbing element 13 corresponds to the antenna 12 located in the first groove 111. The electromagnetic wave absorbing element 13 and the antenna 12 are separated by a carrier plate 11 and spaced apart by one. The pitch is reduced by the electromagnetic wave absorbing element 13 on the anti-electromagnetic wave surface to reduce the eddy current loss on the metal material. Here, the pitch is smaller than the thickness of the carrier plate 11. The electromagnetic wave reflected by the antenna facing the electromagnetic wave surface can be fixed, and a fixed load is formed on the antenna, and at the same time, electromagnetic wave interference from a possible device behind the non-contact card reading device is blocked.

Please refer to Figure 5 for a schematic cross-sectional view of another aspect of the creation. In some embodiments, the base 71 is provided with a solar module 61. The solar module 61 is disposed between the carrier 11 and the base 71 and faces the second surface 11b of the carrier 11. Here, the base portion 71 and the upper cover 72 are made of a light-transmitting material, so that the solar module 61 can generate electric power via visible light. Further, one side of the solar module 61 is provided with an electromagnetic wave absorbing plate 62 such that the solar module 61 is located between the electromagnetic wave absorbing plate 62 and the carrier plate 11. At least a part of the electromagnetic wave absorbing plate 62 is made of a metal material, and the electromagnetic wave magnetic field is reflected by the nature of the material to form a fixed value. When the antenna electromagnetic wave encounters metal, it will reflect the electromagnetic wave due to Lenz's Law. This interference will be different because the non-contact card reading device is installed in different materials or different shapes of metal casing. Connect The reception is affected to varying degrees, resulting in abnormal reading signals. In other words, the electromagnetic wave absorbing plate 62 can be mounted on the metal material regardless of the shape and material of the non-contact card reading device 1 installed in the electromagnetic wave absorbing plate 62. Eddy current loss and increase the card reading distance of the contactless card.

This creation reduces the influence of the load effect caused by the interference of adjacent metal objects on the antenna, and blocks the electromagnetic wave interference from other possible devices behind the non-contact card reading device, and then the electromagnetic wave absorbing material minimizes the interference of the modulated signal. It does not affect the card reading error regardless of the metal casing of the device. In addition, the creation can generate the required power via visible light, significantly reducing the cost of electricity required for its use.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art, and some modifications and refinements that do not depart from the spirit of the present invention should be included in the creation. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application.

1‧‧‧Contactless card reader

10‧‧‧Antenna structure

11‧‧‧Loading board

11a‧‧‧ first side

11b‧‧‧ second side

111‧‧‧First groove

112‧‧‧second groove

12‧‧‧Antenna

13‧‧‧Electromagnetic wave absorbing element

20‧‧‧Transition module

30‧‧‧Control unit

40‧‧‧Interface unit

50‧‧‧Host

61‧‧‧Solar modules

62‧‧‧Electromagnetic wave absorption board

71‧‧‧ base

711‧‧‧ 容 部

72‧‧‧Upper cover

Figure 1 is a block diagram of the system of the creation.

Figure 2 is a schematic diagram of the appearance of the creation.

Figure 3 is an exploded view of the creation.

Figure 4A is a schematic diagram of the structure of the created antenna.

Figure 4B is a schematic view of another perspective of the inventive antenna structure.

Figure 5 is a schematic cross-sectional view showing another aspect of the creation.

1‧‧‧Contactless card reader

10‧‧‧Antenna structure

11‧‧‧Loading board

11a‧‧‧ first side

111‧‧‧First groove

12‧‧‧Antenna

13‧‧‧Electromagnetic wave absorbing element

61‧‧‧Solar modules

62‧‧‧Electromagnetic wave absorption board

71‧‧‧ base

711‧‧‧ 容 部

72‧‧‧Upper cover

Claims (11)

An antenna structure includes: a carrier board including a first surface and a second surface, the first mask has a first recess, the second mask has a second recess; and an antenna, a portion of the antenna One side of the first groove is exposed to the carrier plate; and an electromagnetic wave absorbing member is located at the second groove of the second surface, and the electromagnetic wave absorbing element is spaced apart from the antenna by the carrier plate spacing. The antenna structure of claim 1, wherein the spacing is less than the thickness of the carrier. The antenna structure of claim 1, wherein the first groove surrounds a circumference of the first surface, and the second groove surrounds a circumference of the second surface. The antenna structure of claim 1, wherein the carrier board is made of a light transmissive material. The antenna structure of claim 1, wherein the first groove is disposed corresponding to the second groove. The antenna structure of claim 5, wherein the electromagnetic wave absorbing element corresponds to the antenna located in the first recess. A contactless card reading device comprising: an antenna structure according to any one of claims 1 to 6; a base portion carrying the antenna structure; and an upper cover coupled to the base portion to cover the antenna structure. The non-contact card reading device of claim 7, further comprising: a solar module facing the second side of the carrier. The non-contact card reading device according to claim 8, further comprising: an electromagnetic wave absorbing plate located at One side of the solar module is such that the solar module is located between the electromagnetic wave absorbing plate and the carrier plate. The non-contact card reading device of claim 7, wherein the base is made of a light transmissive material. The non-contact card reading device of claim 7, wherein the upper cover is made of a light transmissive material.