CN219499373U

CN219499373U - Wireless charging and L-shaped near field communication double-coil device

Info

Publication number: CN219499373U
Application number: CN202320695472.8U
Authority: CN
Inventors: 任金荣; 刘奕彬
Original assignee: Shanghai Deman Electronics Technology Co Ltd
Current assignee: Shanghai Deman Electronics Technology Co Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-08-08
Anticipated expiration: 2033-03-31

Abstract

The utility model provides a wireless charging and L-shaped near field communication double-coil device, which comprises an NFC coil, a wireless charging coil, an FPC layer and a magnetic material layer, wherein the NFC coil is arranged on the NFC coil; the NFC coil and the wireless charging coil are both arranged on the top surface of the FPC layer, and the space surrounded by the NFC coil and the wireless charging coil is not overlapped; the magnetic material layer is arranged on the bottom surface of the FPC layer. According to the utility model, through the matched use of the NFC coil and the wireless charging coil which are formed by surrounding the NFC coil and the wireless charging coil and have no overlapping space, the coupling influence between the NFC coil and the wireless charging coil is reduced, the working efficiency is improved, and the wireless charging and NFC double coil is integrated into a whole through integrating the near field communication and wireless charging functions, so that the NFC coil has the characteristic of small thickness, is beneficial to reducing the occupied area and space, is beneficial to reducing the occupied area of electronic equipment, and is beneficial to ensuring the performance and reducing the cost through the double coil formed by the enameled wire winding and the metal wire.

Description

Wireless charging and L-shaped near field communication double-coil device

Technical Field

The utility model relates to the technical field of wireless charging, in particular to a wireless charging and L-shaped near field communication double-coil device.

Background

Near field communication (near field communication), which is an emerging technology, is that devices using NFC technology can exchange data in the condition of being close to each other, and is integrated and evolved by non-contact Radio Frequency Identification (RFID) and interconnection technology, and by integrating functions of an inductive card reader, an inductive card and point-to-point communication on a single chip, mobile terminals are utilized to realize applications such as mobile payment, electronic ticketing, access control, mobile identity recognition, anti-counterfeiting and the like. Through NFC function, can conveniently realize wireless connection and data sharing between a plurality of electronic equipment such as cell-phone, PDA, computer.

The wireless charging technology is an emerging technology, particularly, the wireless charging technology represented by electromagnetic induction brings convenience to consumers, and wireless charging is expected to become a mainstream charging technology of the smart phone in the future. The wireless charging equipment can charge the mobile phone conveniently, so that consumers get rid of the constraint of wires. Wireless charging can be implemented as a compact wireless charging function for a set of handsets, as well as paving a road for charging multiple portable devices simultaneously. When a plurality of devices are charged, the positions of the devices relative to the charger are not limited, so that wireless terminals with wireless charging functions are increasingly introduced into the market.

The inventor considers that along with the development of electronic products, people tend to be lighter and thinner when designing the electronic terminal, the high-end electronic terminal needs to integrate two functions of the wireless charging and the NFC coil at the same time, the occupied space is larger, the cost is higher, and the internal space of the electronic terminal such as a mobile phone, a tablet and the like is narrow, so that the space reserved for the wireless charging and the NFC is small in size, thin in thickness and irregular in shape. Therefore, it is desirable to provide a wireless charging and L-type near field communication dual coil device that can simultaneously ensure both normal performance and reduce cost while meeting space size requirements.

Disclosure of Invention

In view of the drawbacks of the prior art, an object of the present utility model is to provide a wireless charging and L-shaped near field communication dual coil device.

The utility model provides a wireless charging and L-shaped near field communication double-coil device, which comprises an NFC coil, a wireless charging coil, an FPC layer and a magnetic material layer, wherein the NFC coil is arranged on the NFC coil; the NFC coil and the wireless charging coil are both arranged on the top surface of the FPC layer, and the space surrounded by the NFC coil and the wireless charging coil is not overlapped; the magnetic material layer is arranged on the bottom surface of the FPC layer.

Preferably, the wires of the NFC coil and the wireless charging coil are all arranged on the FPC layer in a spiral shape.

Preferably, the space surrounded by the NFC coil includes an L-shaped ring shape.

Preferably, the NFC coil comprises a metal wire.

Preferably, the space surrounded by the wireless charging coil comprises a rectangle, a circle or a polygon.

Preferably, the wireless charging coil comprises a plurality of enameled wire windings, and the plurality of enameled wire windings comprise a metal coil wound by a plurality of single-sided enameled wires or a plurality of double-sided enameled wires.

Preferably, two ends of a wire of the NFC coil are respectively provided with an NFC coil feeding point, one is arranged on an outer ring of the NFC coil, and the other passes through the bottom of the NFC coil from the inner ring to the outer ring; the wireless charging coil comprises a wireless charging coil body, wherein two ends of a wire of the wireless charging coil body are respectively provided with a wireless charging coil feeding point, one wire is arranged on the outer ring of the wireless charging coil body, and the other wire penetrates through the bottom of the wireless charging coil body from the inner ring to the outer ring.

Preferably, an extension portion extends outwards from one side edge of the FPC layer, and the NFC coil feeding point and the wireless charging coil feeding point are both arranged on the extension portion.

Preferably, the magnetic material layer comprises a ferrite layer or a nanocrystalline magnetic flexible material layer.

Preferably, the thickness of the double coil device is 0.28mm or more and 0.36mm or less.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the matched use of the NFC coil and the wireless charging coil which are formed by surrounding the NFC coil and the wireless charging coil and have no overlapping space, the coupling influence between the NFC coil and the wireless charging coil is reduced, the working efficiency is improved, and the wireless charging and NFC double coil is integrated into a whole through integrating the near field communication and wireless charging functions, so that the NFC coil has the characteristic of small thickness, is beneficial to reducing the occupied area and space, is beneficial to reducing the occupied area of electronic equipment, and is beneficial to ensuring the performance and reducing the cost through the double coil formed by the enameled wire winding and the metal wire.

2. According to the NFC charging device, the NFC coil and the wireless charging coil which can be adjusted according to the shape of the FPC layer are beneficial to more flexible coil arrangement, and the NFC coil feeding point and the wireless charging coil feeding point are arranged on one side, so that the NFC charging device is convenient to feed and connect, the difficulty in installation and arrangement is reduced, the charging effect is improved, the NFC charging device is suitable for the inside of narrow-space terminals such as mobile phone flat plates, and the application range of a double-coil device is improved.

3. The utility model is beneficial to improving the magnetic field effect and reducing the influence of the metal material on the magnetic field of the antenna by arranging the magnetic material, thereby being beneficial to increasing the communication and charging efficiency of the antenna.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

fig. 1 is a top view of a dual coil device embodying the present utility model, primarily wireless charging and L-shaped near field communication;

FIG. 2 is a schematic diagram showing the positional relationship between the FPC layer and the magnetic material layer according to the present utility model;

fig. 3 is a schematic cross-sectional structure of a wireless charging and L-shaped near field communication dual coil device according to the present utility model.

Reference numerals:

NFC coil 1 wireless charging coil 2 FPC layer 3

Magnetic material layer 4 NFC coil feed point 101 wireless charging coil feed point 201

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

As shown in fig. 1 to 3, a wireless charging and L-shaped near field communication dual coil device according to the present utility model includes: NFC coil 1, wireless charging coil 2, FPC layer 3, and magnetic material layer 4; the NFC coil 1 and the wireless charging coil 2 are arranged on the top surface of the FPC layer 3, and the space formed by the NFC coil 1 and the wireless charging coil 2 is not overlapped; the magnetic material layer 4 is provided on the bottom surface of the FPC layer 3.

Magnetic field coupling between NFC coil 1 and wireless charging coil 2 double-coil can make wireless charging and NFC efficiency reduce, and this application sets up the two separately, can effectively reduce the coupling influence to improve work efficiency. Further, NFC coil 1 and wireless charging coil 2 separate setting can walk the line nimble, more are fit for installing at terminal complex narrow and small space such as cell-phone flat board, have improved the range of application of this application greatly.

The flexible FPC layer is generally selected as the substrate layer of the FPC layer 3. The leads of the NFC coil 1 and the wireless charging coil 2 are spirally arranged on the FPC layer 3.

In special cases, the FPC layer 3 may have an irregular shape, and thus, the spiral shape of the NFC coil 1 may be adjusted according to the shape of the FPC layer 3, including an L-shape ring or other polygonal shape. In this embodiment, the space enclosed by the NFC coil 1 is in an L-shape and is more attached to the rectangular FPC layer 3. Furthermore, the L-shaped NFC coil 1 is thinner, narrower and flexible, and is more suitable for the inside of a terminal with a narrow space such as a mobile phone panel.

Likewise, the shape of the wireless charging coil 2 may be adjusted according to the shape of the FPC layer 3, including rectangular, circular, or polygonal. In this embodiment, the space enclosed by the wireless charging coil 2 is rectangular.

The NFC coil 1 comprises a metal wire. The two ends of the lead of the NFC coil 1 are respectively provided with an NFC coil feeding point 101, one is arranged on the outer ring of the NFC coil 1, and the other passes through the bottom of the NFC coil 1 from the inner ring to the outer ring.

The wireless charging coil 2 comprises a plurality of strands of enameled wire windings, and the plurality of strands of enameled wire windings comprise a plurality of strands of single-sided enameled wires or a plurality of strands of metal coils wound by double-sided enameled wires.

The two ends of the wire of the wireless charging coil 2 are respectively provided with a wireless charging coil feed point 201, one is arranged on the outer ring of the wireless charging coil 2, and the other passes through the bottom of the wireless charging coil 2 from the inner ring to the outer ring. This application all locates the coil outer lane with two wireless charging coil feed points 201, and the feed of being convenient for is connected, reduces the degree of difficulty that the installation set up, improves the effect of charging.

An extension part extends outwards from one side edge of the FPC layer 3, and the NFC coil feeding point 101 and the wireless charging coil feeding point 201 are both arranged on the extension part.

By arranging the magnetic material 4, the influence of the metal material on the magnetic field of the antenna is reduced, and the communication and charging efficiency of the antenna is effectively improved. In order to enhance the magnetic field effect, the magnetic material layer 4 includes a ferrite layer or a nanocrystalline magnetic flexible material layer.

The thickness of the double-coil device is more than or equal to 0.28mm and less than or equal to 0.36mm, the thickness is small, the integration is good, and the equipment space is saved.

When the wireless charging radio frequency circuit module works, alternating current signals of the wireless charging radio frequency circuit module are transmitted to the wireless charging coil 2 through the wireless charging coil feed point 201 to form annular current of a closed loop. Under the action of the magnetic material layer 4, the alternating current forms a strong magnetic field in the direction perpendicular to the current loop, and radiates outwards from the equipment shell, so that coupling induction with external equipment is completed, and a wireless charging function is realized. The alternating current signal of the NFC radio frequency circuit module is transmitted to the NFC coil 1 through the NFC coil feeding point 101, thereby forming a loop current of a closed loop. Under the influence of the magnetic material 4, the alternating current will form a strong magnetic field in the direction perpendicular to the current loop. Namely, the NFC magnetic field is perpendicular to the position right below the NFC coil 1 and radiates outwards from the rear cover of the device, so that the coupling communication with external communication equipment is completed.

The wireless charging and NFC dual-coil integrated device integrates the functions of near field communication and wireless charging, integrates the wireless charging and NFC dual-coil into a whole, has the characteristic of small thickness, reduces occupied area and space, and can reduce the occupied area of electronic equipment. Through NFC coil 1 and wireless charging coil 2 separately setting, can effectively reduce the coupling influence to improve work efficiency. The double coil formed by the enameled wire winding and the metal wire has obvious price advantage and good performance.

Principle of operation

The alternating current signal of the wireless charging radio frequency circuit module is transmitted to the wireless charging coil 2 through the wireless charging coil feeding point 201 to form a closed loop annular current. Under the action of the magnetic material layer 4, the alternating current forms a strong magnetic field in the direction perpendicular to the current loop, and radiates outwards from the equipment shell, so that coupling induction with external equipment is completed, and a wireless charging function is realized. The alternating current signal of the NFC radio frequency circuit module is transmitted to the NFC coil 1 through the NFC coil feeding point 101, thereby forming a loop current of a closed loop. Under the influence of the magnetic material 4, the alternating current will form a strong magnetic field in the direction perpendicular to the current loop. Namely, the NFC magnetic field is perpendicular to the position right below the NFC coil 1 and radiates outwards from the rear cover of the device, so that the coupling communication with external communication equipment is completed.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims

1. A wireless charging and L-shaped near field communication dual coil apparatus, comprising: an NFC coil (1), a wireless charging coil (2), an FPC layer (3) and a magnetic material layer (4);

the NFC coil (1) and the wireless charging coil (2) are arranged on the top surface of the FPC layer (3), and the space enclosed by the NFC coil (1) and the wireless charging coil (2) is not overlapped;

the magnetic material layer (4) is arranged on the bottom surface of the FPC layer (3).

2. The wireless charging and L-shaped near field communication dual coil device according to claim 1, wherein the wires of the NFC coil (1) and the wireless charging coil (2) are each arranged in a spiral on the FPC layer (3).

3. A wireless charging and L-shaped near field communication dual coil device according to claim 1, characterized in that the space enclosed by the NFC coil (1) comprises an L-shaped loop.

4. A wireless charging and L-shaped near field communication dual coil device according to claim 1, characterized in that the NFC coil (1) comprises a metal wire.

5. A wireless charging and L-shaped near field communication dual coil device according to claim 1, characterized in that the space enclosed by the wireless charging coil (2) comprises a rectangle or a circle or a polygon.

6. The wireless charging and L-shaped near field communication dual coil device according to claim 1, wherein the wireless charging coil (2) comprises a multi-strand wire enamel wire winding comprising a metal coil wound of multi-strand single-sided enamel wire or multi-strand double-sided enamel wire.

7. The wireless charging and L-type near field communication dual coil device according to claim 1, wherein two ends of the wire of the NFC coil (1) are respectively provided with an NFC coil feeding point (101), one is arranged on the outer ring of the NFC coil (1), and the other passes through the bottom of the NFC coil (1) from the inner ring to the outer ring;

the wireless charging coil is characterized in that two ends of a wire of the wireless charging coil (2) are respectively provided with a wireless charging coil feed point (201), one wire is arranged on the outer ring of the wireless charging coil (2), and the other wire penetrates through the bottom of the wireless charging coil (2) from the inner ring to the outer ring.

8. The wireless charging and L-shaped near field communication dual coil device of claim 7, wherein an extension portion is extended outwardly from one side of the FPC layer (3), and the NFC coil feeding point (101) and the wireless charging coil feeding point (201) are both disposed on the extension portion.

9. A wireless charging and L-shaped near field communication dual coil device according to claim 1, characterized in that the magnetic material layer (4) comprises a ferrite layer or a nanocrystalline magnetically flexible material layer.

10. The wireless charging and L-shaped near field communication dual coil device of claim 1, wherein a thickness of the dual coil device is 0.28mm or more and 0.36mm or less.