WO2017133064A1

WO2017133064A1 - Metal housing-based near field communication apparatus, electronic device, and method

Info

Publication number: WO2017133064A1
Application number: PCT/CN2016/077372
Authority: WO
Inventors: 陈佳南; 马超; 严清夏
Original assignee: 上海德门电子科技有限公司
Priority date: 2016-02-02
Filing date: 2016-03-25
Publication date: 2017-08-10
Also published as: CN105742787A

Abstract

A metal housing-based near field communication apparatus, an electronic device, and a method. The apparatus comprises a first metal housing (1), a second metal housing (2), a first wire (16), a second wire (17), a first circuit contact (6), and a second circuit contact (7). The first wire (16) and the second wire (17) are connected to the first metal housing (1); and a gap exists between the first metal housing (1) and the second metal housing (2). By means of the structure, an NFC function is implemented without an NFC antenna and a ferrite; the cost of the electronic device is reduced; meanwhile, the appearance of the electronic device is not changed; the space of a mobile phone and other electronic devices is saved; the model structure is simple; and the performance is excellent.

Description

Near-field communication device based on metal shell and electronic device and method

Technical field

The invention relates to an antennaless structure, in particular to a near-field communication device based on a metal shell and an electronic device and method.

Background technique

NFC is a wireless connectivity technology that provides easy, secure, and fast communication. First of all, NFC has the characteristics of close distance, high bandwidth and low energy consumption. Second, NFC is compatible with existing contactless smart card technology and has become the official standard supported by more and more major vendors. Again, NFC is a close-range connection protocol that provides easy, secure, fast, and automatic communication between devices. Compared to other connections in the wireless world, NFC is a close-range, private communication method. NFC plays a huge role in the fields of access control, public transportation, and mobile payment. Most NFC mobile phones are built-in NFC chips, plus NFC antennas. As the mobile phone environment becomes more and more harsh, the internal space of mobile phones is getting smaller and smaller, and there is rarely room for adding NFC antennas. The metal backshell of mobile phones will become mainstream. The performance of the conventional NFC antenna in the metal back shell environment will be seriously interfered, because the shielding of the electromagnetic field by the metal back shell makes the conventional NFC antenna form eddy current, so it is necessary to propose a structure based on the metal back shell without antenna to solve the current The problem is that the original metal of the mobile phone is used to radiate to realize the NFC performance, and the NFC antenna is not needed, so that the mobile phone can be used as the metal back shell environment, which saves the cost, does not change the appearance of the machine, realizes the space saving of the mobile phone, and has a simple structure. Superior performance and other characteristics.

Summary of the invention

In view of the deficiencies in the prior art, an object of the present invention is to provide a near-field communication device and an electronic device and method based on a metal shell.

A metal shell-based near field communication device according to the present invention includes a first metal housing, a first wire, a second wire, a first circuit contact, and a second circuit contact;

One end of the first wire is connected to the first metal shell, and the other end of the first wire is connected to the first circuit contact;

One end of the second wire is connected to the first metal shell, and the other end of the second wire is connected to the second circuit contact;

The junction of the first wire and the first metal casing is referred to as a joint A;

The junction of the second wire and the first metal casing is referred to as a joint B;

There is a gap between the joint A and the joint B.

Preferably, further comprising a second metal housing;

There is a gap between the first metal housing and the second metal housing.

Preferably, the first wire is wound and connected to the first circuit contact, and/or the second wire is wound and connected to the second circuit contact.

Preferably, the first wire, the second wire, the first circuit contact, and the second circuit contact are all located inside the first metal casing.

Preferably, the slit constitutes a signal radiation window.

Preferably, the gap is a hollowed out structure or filled with a non-magnetically shielded medium.

Preferably, a communication chip is further included;

The first circuit contact and the second circuit contact are connected to the communication chip.

An electronic device according to the present invention includes the above-described metal case-based near field communication device.

Preferably, the electronic device is a mobile phone;

The housing of the mobile phone includes a first metal housing, or the housing of the mobile phone includes a first metal housing and a second metal housing.

According to the metal shell-based near field communication method provided by the present invention, the metal casing of the electronic device is used as an antenna.

Compared with the prior art, the present invention has the following beneficial effects:

The invention adopts the antenna coil which is subtly replaced by the first metal casing, realizes the NFC function in the structure without antenna, does not need the NFC antenna and the ferrite, saves the cost of the electronic device, does not change the appearance of the electronic device, saves the mobile phone, etc. The space of the electronic device has a simple model structure and superior performance.

DRAWINGS

Other features, objects, and advantages of the present invention will become apparent from the Detailed Description of Description

Figure 1 is a simplified schematic diagram of a conventional NFC coil trace.

2 is a schematic plan view of a conventional NFC coil trace above a magnetic material.

3 is a simplified plan view of a metal shell-based near field communication device provided by the present invention.

4 is a perspective view showing a simplified structure of a metal shell-based near field communication device according to the present invention.

FIG. 5 is a schematic diagram of current flow after the metal shell-based near field communication device is powered on according to the present invention.

6 is a current flow of the first metal shell (the upper half of the metal back shell) and the second metal shell (the lower half of the metal back shell) of the metal shell-based near field communication device provided by the present invention. schematic diagram.

Figure 7 is a virtual magnetic field generated by the present invention.

8 is a top plan view of a winding module in a metal case-based near field communication device according to the present invention.

9 is a cross-sectional view of a winding module in a metal case-based near field communication device according to the present invention.

In the picture:

1. a first metal casing;

2. a second metal casing;

3. Winding module;

4. a joint between the non-wound portion of the first wire and the wound portion;

5. a joint between the non-wound portion of the second wire and the wound portion;

6, the first circuit contact;

7. The second circuit contact;

8. One end of the first wire;

9. One end of the second wire;

10, the coil;

11, the substrate;

12, coil feed points;

13. Magnetic materials;

14, the coil window;

15, the gap;

16. The first wire;

17. a second wire;

18. Magnetic field.

detailed description

The invention will now be described in detail in connection with specific embodiments. The following examples are intended to further understand the invention, but are not intended to limit the invention in any way. It should be noted that the common technology in the field Many changes and modifications can be made by the skilled person without departing from the inventive concept. These are all within the scope of protection of the present invention.

As shown in FIG. 3 and FIG. 4, a metal case-based near field communication device according to the present invention includes a communication chip, a first metal case, a second metal case, a first wire, a second wire, and a first a circuit contact and a second circuit contact; one end of the first wire is connected to the first metal casing, and the other end of the first wire is connected to the first circuit contact; one end of the second wire is connected to the first metal casing, and the second wire is connected to the other One end is connected to the second circuit contact; the connection of the first wire to the first metal casing is denoted as the connection A; the connection of the second wire and the first metal casing is denoted as the connection B; the connection A and the connection There is a gap between B. There is a gap between the first metal housing and the second metal housing. The metal shell based near field communication device utilizes the first metal housing as part of the antenna coil and applies the first metal housing to achieve radiation performance.

Specifically, the first wire is wound and connected to the first circuit contact, and the second wire is wound and connected to the second circuit contact. The winding portion of the first wire and the second wire and the winding base form a winding module, and the function of the winding module is to increase the inductance, wherein the winding module can be formed in the form of an X-shaped twisted pair. , as shown in Figure 8 and Figure 9. Preferably, in the winding module, the winding portions of the first wire and the second wire extend in the same direction or in the opposite direction around the same axis, and form a plurality of X-shaped intersections with each other. The slit constitutes a signal radiation window. The gap is a hollow structure or a non-magnetic shielding medium. The first circuit contact and the second circuit contact are connected to the communication chip. For example, the communication chip may be an NFC chip. As shown in FIG. 4, the first wire, the second wire, the first circuit contact, and the second circuit contact are both located inside the first metal casing, and when the first metal casing belongs to the back casing of the mobile phone, the first wire, the first wire The two wires, the first circuit contact, and the second circuit contact are all located inside the rear case of the mobile phone, that is, inside the mobile phone case.

More specifically, the first metal housing is electrically connected to the second metal housing (in a variant, the first metal housing and the second metal housing may also be non-conducting); the width of the slit may be 1 mm Up to 3 mm; the spacing between the joint A and the joint B may be 2 mm to 200 mm. Preferably, the joint A and the joint B are respectively located at two points farthest from the inner side of the first metal shell.

An electronic device according to the present invention includes the metal shell based near field communication device. The electronic device may be, for example, a mobile phone; the housing of the mobile phone includes a first metal housing, or the housing of the mobile phone includes a first metal housing and a second metal housing.

According to the metal shell-based near field communication method provided by the present invention, the metal casing of the electronic device is used as an antenna. Specifically, the metal casing is utilized as a part of the antenna coil, and the metal casing is used to achieve radiation performance.

The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and various changes or modifications may be made by those skilled in the art within the scope of the claims. This does not affect the substance of the invention. The features of the embodiments and the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

A near-field communication device based on a metal shell, comprising: a first metal housing, a first wire, a second wire, a first circuit contact, and a second circuit contact;

One end of the first wire is connected to the first metal shell, and the other end of the first wire is connected to the first circuit contact;

One end of the second wire is connected to the first metal shell, and the other end of the second wire is connected to the second circuit contact;

The junction of the first wire and the first metal casing is referred to as a joint A;

The junction of the second wire and the first metal casing is referred to as a joint B;

There is a gap between the joint A and the joint B.
The metal shell-based near field communication device according to claim 1, further comprising a second metal housing;

There is a gap between the first metal housing and the second metal housing.
The metal case-based near field communication device according to claim 1, wherein the first wire is wound and connected to the first circuit contact, and/or the second wire is wound and connected to the second circuit contact. .
The metal case-based near field communication device according to claim 2, wherein the first wire, the second wire, the first circuit contact, and the second circuit contact are both located inside the first metal case.
The metal shell-based near field communication device according to claim 2, wherein the slit constitutes a signal radiation window.
The metal shell-based near field communication device according to claim 5, wherein the gap is a hollow structure or a non-magnetic shielding medium.
The metal shell-based near field communication device according to claim 1, further comprising a communication chip;

The first circuit contact and the second circuit contact are connected to the communication chip.
An electronic device comprising the metal shell-based near field communication device according to any one of claims 1 to 7.
The electronic device according to claim 8, wherein the electronic device is a mobile phone;

The housing of the mobile phone includes a first metal housing, or the housing of the mobile phone includes a first metal housing and a second metal housing.
A near-field communication method based on a metal shell, characterized in that a metal case of an electronic device is used as an antenna.