Wireless charging coil module integrated with metal support nfc antenna communication function

Abstract

The application discloses a wireless charging coil module integrated with a metal support NFC antenna communication function, which comprises a metal support, an NFC coil module, a wireless charging module and a magnet. The metal support is provided with a cavity and a slot, and the cavity is communicated with the outside through the slot. The magnet is arranged around the inner wall of the cavity, and the magnet is provided with a first opening and a second opening; the first opening is arranged close to the slot, and the second opening is arranged relative to the first opening with the center of the cavity. The wireless charging module is arranged at the center of the cavity, and a gap is left between the wireless charging module and the magnet. One end of the NFC coil module is connected with the contact of the metal support, and the metal sheet connected through the first opening and the gap is connected to the second opening. The application can have both NFC communication and wireless charging functions; the NFC communication and wireless charging functions are integrated in a limited space, so that the equipment space can be effectively saved; the metal support is part of the NFC coil, so that the overall radiation area of the coil is improved.

Description

Technical Field

[0001] This invention belongs to the field of wireless charging and NFC communication technology, and particularly relates to a wireless charging coil module with integrated metal bracket NFC antenna communication function. Background Technology

[0002] NFC (Near Field Communication) technology has been widely used for data exchange and communication between electronic devices or between electronic devices and NFC readers. It has great application prospects, especially in mobile payment, public transportation, and healthcare. NFC is now almost a standard feature in mobile and wearable devices.

[0003] The Qi 2.0 MPP protocol adds a magnetic attraction scheme to Qi 1.0 to increase the attraction between the charging Tx and Rx coils, thereby enabling precise alignment of their relative positions. However, the magnets used for positioning as described in the Qi 2.0 MPP protocol occupy a significant portion of the available space, thus limiting the design of the NFC coil. Given the extremely limited space in current portable and wearable devices, using an integrated NFC and wireless charging solution is necessary to improve overall space utilization. Summary of the Invention

[0004] The technical objective of this invention is to provide a wireless charging coil module with integrated metal bracket NFC antenna communication function to solve the problem of low space utilization.

[0005] To solve the above problems, the technical solution of the present invention is as follows:

[0006] A wireless charging coil module integrating a metal bracket and NFC antenna communication function includes: a metal bracket, an NFC coil module, a wireless charging module, and a magnet;

[0007] The metal bracket has a cavity and a slot, and the cavity is connected to the outside through the slot;

[0008] A magnet is arranged around the inner wall of the cavity, and the magnet has a first opening and a second opening; the first opening is located close to the slot, and the second opening is located relative to the first opening with the center of the cavity in mind;

[0009] The wireless charging module is located in the center of the cavity, and a gap is left between the wireless charging module and the magnet;

[0010] One end of the NFC coil module is connected to the contact of the metal bracket, and then connected to the metal plate of the second opening via the outer edge of the magnet or the first opening and gap.

[0011] The cavity is circular, and the magnets are arranged in an arc on both sides of the inner wall of the cavity. The magnets on both sides are separated from each other by the first opening and the second opening.

[0012] Specifically, the wireless charging module includes a coil, an iron core, and a metal sheet;

[0013] The iron core is located at the center of the cavity. One end of the coil is connected to the iron core, and the metal sheet passes through the second opening and is connected to the metal bracket. The other end of the coil is connected to the metal sheet.

[0014] The NFC coil module includes at least one NFC coil. One end of the NFC coil is connected to a contact on one side of the slot. The NFC coil passes through the first opening and extends into the gap on the other side of the slot. The other end of the NFC coil extends out of the gap and is connected to a metal sheet.

[0015] The NFC coil can be a single-strand single-turn or a multi-strand multi-turn coil.

[0016] The NFC coil is made of FPC, copper wire, or LDS and silver paste printed conductor material.

[0017] Further preferably, ferrite and nanocrystalline magnetic materials can be added to the NFC coil material to improve NFC performance.

[0018] Because of the above technical solutions, this invention has the following advantages and positive effects compared with the prior art:

[0019] This invention can combine NFC communication and wireless charging functions; integrating NFC communication and wireless charging functions in a limited space can effectively save device space; its metal bracket is part of the NFC coil, which increases the overall radiation area of ​​the coil. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention.

[0021] Figure 1 This invention relates to a wireless charging coil module with integrated metal bracket NFC antenna communication function;

[0022] Figure 2 This invention relates to another wireless charging coil module with integrated metal bracket NFC antenna communication function.

[0023] Explanation of reference numerals in the attached figures

[0024] 1: Wireless charging module; 2: NFC coil module; 3: Metal bracket; 4: Magnet; 5: Slot; 6: Contact point. Detailed Implementation

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0026] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0027] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a wireless charging coil module integrating a metal bracket and 3NFC antenna communication function, according to the present invention. The advantages and features of the present invention will become clearer from the following description and claims.

[0028] Example

[0029] See Figure 1 and Figure 2 In this embodiment, to integrate the NFC antenna and the wireless charging coil into one unit, a wireless charging coil module with integrated metal bracket 3 and NFC antenna communication function is provided. Specifically, it includes: a metal bracket 3, an NFC coil module 2, a wireless charging module 1, and a magnet 4.

[0030] exist Figure 1 From a top-down perspective, the metal bracket 3 forms the foundation of this embodiment, consisting of a large piece of metal that provides internal support. A circular cavity is formed inside the metal bracket 3, and a slot 5 is formed on one side wall of this cavity. The internal space of the cavity is connected to the outside through the slot 5. The slot 5 is designed to interrupt the eddy currents in the metal bracket 3. The size of the slot 5 is not particularly limited, but for structural stability, it is relatively small, typically around 1mm. The contact point 6 of the metal bracket 3 is positioned as close as possible to the edge of the slot 5. Figure 1 , Figure 2 In the middle, contact 6 is located on both sides of slot 5, thus ensuring the longest current loop and radiation length between the metals.

[0031] Magnets 4 are arranged around the inner wall of the cavity. Since the cavity is circular, the magnets 4 are distributed in an arc shape on both sides of the inner wall of the cavity. The magnets 4 on both sides are separated from each other by a first opening and a second opening. The first opening is located close to the slot 5, and the second opening is located relative to the first opening with the center of the cavity in mind.

[0032] The wireless charging module 1 is located at the center of the cavity, and a gap is left between the wireless charging module 1 and the magnet 4. Specifically, the wireless charging module 1 includes a coil, an iron core, and a metal plate. The iron core is located at the center of the cavity, one end of the coil is connected to the iron core, the metal plate passes through the second opening and is connected to the metal bracket 3, and the other end of the coil is connected to the metal plate.

[0033] See Figure 1 and Figure 2 In this embodiment, the NFC coil module 2 includes at least one NFC coil. One end of the NFC coil is connected to a contact 6 on one side of the slot 5. The NFC coil passes through the first opening and extends into the gap (between the magnet 4 and the coil) on the other side of the slot 5 to form an internal and external current loop. The other end of the NFC coil extends out of the gap and connects to a metal sheet. The internal and external current loop is: metal sheet - internal wiring - metal bracket contact - inside the metal bracket - another contact of the metal bracket - internal wiring - metal sheet. The NFC coil is either inside the magnet 4 (passing through the gap) or outside the magnet 4 (not shown in the figure). It connects to the metal bracket 3 through the gap in the magnet 4 to form a loop, thereby realizing the NFC communication function. The NFC coil being located outside the magnet 4 means it runs along the outer edge of the magnet 4, allowing direct connection to the metal bracket 3 without passing through the gap in the magnet 4.

[0034] like Figure 1 As shown, two NFC coils are provided. The ends of the two NFC coils are connected to contacts 6 on both sides, then cross each other and enter the gaps on both sides, finally connecting to the corresponding positions of the metal plates. Figure 2 As shown, only one NFC coil is provided. The end of the NFC coil is connected to contact 6, and then extends to the other side of contact 6 into the gap, and finally connects to the metal sheet.

[0035] The NFC coil can be partially inside the magnet 4, partially outside, or entirely outside the magnet 4. The NFC coil can be a single-strand single-turn coil or a multi-strand multi-turn coil. The NFC coil material can be an FPC, copper wire, or a conductor material formed by LDS and silver paste printing. Preferably, ferrite, nanocrystals, or other magnetically conductive materials can be added to the NFC coil material to improve NFC performance.

[0036] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A wireless charging coil module integrating a metal bracket and NFC antenna communication function, characterized in that, include: Metal bracket, NFC coil module, wireless charging module, and magnet; The metal bracket has a cavity and a slot, and the cavity communicates with the outside through the slot; The magnet is arranged around the inner wall of the cavity, and the magnet has a first opening and a second opening; the first opening is located close to the slot, and the second opening is located relative to the first opening with the center of the cavity in mind; The wireless charging module is located at the center of the cavity, and a gap is left between the wireless charging module and the magnet; One end of the NFC coil module is connected to the contact of the metal bracket, and is connected to the metal sheet of the second opening via the outer edge of the magnet or the first opening and gap.

2. The wireless charging coil module with integrated metal bracket NFC antenna communication function according to claim 1, characterized in that, The cavity is circular, and the magnets are arranged in an arc on both sides of the inner wall of the cavity. The magnets on both sides are separated from each other by the first opening and the second opening.

3. The wireless charging coil module with integrated metal bracket NFC antenna communication function according to claim 1, characterized in that, The wireless charging module includes a coil, an iron core, and the metal sheet; The iron core is located at the center of the cavity, one end of the coil is connected to the iron core, the metal sheet passes through the second opening and is connected to the metal bracket, and the other end of the coil is connected to the metal sheet.

4. The wireless charging coil module with integrated metal bracket NFC antenna communication function according to claim 1, characterized in that, The NFC coil module includes at least one NFC coil. One end of the NFC coil is connected to the contact on one side of the slot. The NFC coil passes through the first opening and extends into the gap on the other side of the slot. The other end of the NFC coil extends out of the gap and connects to the metal sheet.

5. The wireless charging coil module with integrated metal bracket NFC antenna communication function according to claim 4, characterized in that, The NFC coil is a single-strand single-turn or multi-strand multi-turn coil.

6. The wireless charging coil module with integrated metal bracket NFC antenna communication function according to claim 4, characterized in that, The NFC coil is made of FPC, copper wire, or LDS and silver paste printed conductor material.

7. The wireless charging coil module with integrated metal bracket NFC antenna communication function according to claim 6, characterized in that, The NFC coil material can also incorporate ferrite and nanocrystalline magnetic materials to improve NFC performance.

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