NFC multi-antenna switching circuit and cabinet

Abstract

The utility model provides an NFC (Near Field Communication) multi-antenna switching circuit and a cabinet, which are arranged in a charging cabinet and can communicate with power banks by virtue of an NFC technology, and the number of the power banks in communication is more than that of the power banks in the prior art. The NFC multi-antenna switching circuit comprises: a control module; each NFC sensing module comprises a first input end, a second input end, an output end and two antennas respectively corresponding to the first input end and the second input end; the switch module comprises a first switch and a second switch, each of the first switch and the second switch comprises a starting signal input port, N control signal input ports and M signal output ports, and M is equal to 2N.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sharing power banks, and particularly relates to an NFC multi-antenna switching circuit and a cabinet machine. BACKGROUND

[0002] Most of the power bank cabinet machines on the market currently use POGOPIN interfaces to transmit data. When the POGOPIN interface is used for a long time, oxidation will appear on the surface of the POGOPIN interface, thereby causing the power bank to be unable to normally communicate when being rented. CONTENT OF THE UTILITY MODEL

[0003] One advantage of the present application is to provide an NFC multi-antenna switching circuit which can control power banks without the help of interfaces, and can control more power banks.

[0004] Another advantage of the present application is to provide an NFC multi-antenna switching circuit, wherein in order to achieve the above-mentioned advantage, expensive materials or complex structures are not required in the present application. Therefore, the present application successfully and effectively provides a solution, not only provides a simple NFC multi-antenna switching circuit, but also increases the practicability and reliability of the NFC multi-antenna switching circuit.

[0005] Therefore, in order to achieve the above-mentioned at least one advantage or other advantages and purposes of the present application, the present application provides an NFC multi-antenna switching circuit, comprising:

[0006] a control module;

[0007] a plurality of NFC induction modules, the NFC induction modules comprising a first input end, a second input end, an output end, and two antennas corresponding to the first input end and the second input end, respectively; and

[0008] a switching module, the switching module comprising a first switch and a second switch, the first switch and the second switch both comprising one start signal input port, N control signal input ports, and M signal output ports, and M=2 N ;

[0009] The first end of the control module is connected with the start signal input port of the first switch, the second end of the control module is connected with the start signal input port of the second switch, the first end and the second end of the control module are used for respectively sending start signals to the start signal input port of the first switch and the start signal input port of the second switch, the control module has N control signal output ports, the N control signal output ports are connected with N control signal input ports of the first switch and N control signal input ports of the second switch, the N control signal output ports are used for sending control signals to the first switch and the second switch, M signal output ports of the first switch and M signal output ports of the second switch are respectively connected with two input ends of M NFC induction modules, the first switch and the second switch are used for determining target signal output ports of the first switch and the second switch respectively according to the control signals, and the two target signal output ports are used for respectively outputting the start signals to the two input ends of the NFC induction module, the output end of the NFC induction module is connected with the third end of the control module, and the two antennas are used for sending information of the electronic tag read to the control module after the two antennas receive the start signal and read the electronic tag of the power bank to be connected.

[0010] Preferably, the NFC multi-antenna switching circuit further comprises a detection module for detecting the position of the power bank inserted into the charging bin.

[0011] Preferably, N≥3.

[0012] Preferably, the first switch and the second switch are both multi-channel switching switches with one input and eight outputs.

[0013] Preferably, the control module comprises an MCU and a card reading chip, the card reading chip is used for reading information of the electronic tag, and the MCU is used for controlling the card reading chip to read information of the electronic tag and sending the control signals for determining the target signal output ports to the first switch and the second switch.

[0014] The MCU is further configured to, after receiving the indication information that the power bank is inserted into the charging compartment of the charging cabinet, control the card reading chip to send a start signal to the first switch and the second switch, and send a control signal to N control signal input ports of the first switch and N control signal input ports of the second switch according to the position of the charging compartment into which the power bank is inserted; the first switch and the second switch determine a target signal output port of the first switch and a target signal output port of the second switch according to the control signal, respectively, and output the start signal to two input ends of the NFC induction module through the two target signal output ports, respectively.

[0015] Preferably, the NFC multi-antenna switching circuit further comprises a network module configured to connect to a network and send the rental status of the power bank to the MCU and a cloud server.

[0016] Preferably, the NFC induction module further comprises an LC filter circuit and an antenna matching circuit, and the antenna matching circuit is configured to adjust a transmitting load and a resonant frequency.

[0017] In another aspect, the present application also provides a charging cabinet, comprising:

[0018] a charging compartment; and

[0019] the NFC multi-antenna switching circuit.

[0020] Preferably, the number of the charging compartments is M, and M = 2 N , N ≥ 3.

[0021] The present application also provides a charging cabinet, comprising:

[0022] a power bank; and

[0023] the charging cabinet.

[0024] The beneficial effects of the present application: the present application provides a NFC multi-antenna switching circuit, the control module is connected to the first switch and the second switch, the first switch and the second switch are connected to the first input end and the second input end of the plurality of NFC induction modules respectively, when the control module sends the start signal and the control signal to the first switch and the second switch, the first switch and the second switch select the NFC induction module corresponding to the control signal according to the control signal, and send the start signal to the first input end and the second input end of the NFC induction module corresponding to the control signal respectively, so that the two antennas are started at the same time, and the information of the electronic tag in the power bank is read, one of the two antennas reads the information of the electronic tag in the power bank, and sends the read information of the electronic tag to the control module through the output end of the NFC induction module corresponding to the control signal.

[0025] The present application provides a power bank, corresponding to two antennas in the NFC induction module, and the output of each of the two switches corresponds to an antenna, and the two switches are controlled by the control module at the same time, so that the two antennas of the induction module can start reading the electronic tag of the power bank at the same time, without starting in sequence, thereby improving the reading efficiency of the electronic tag of the power bank. And each switch is provided with M output, so that only two switches are needed to read the electronic tags of M power banks, reducing the cost of the circuit. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 The flow chart of the NFC multi-antenna switching circuit provided by an embodiment of the present application is shown;

[0028] Figure 2 The structure diagram of the NFC induction module in the NFC multi-antenna switching circuit provided by another embodiment of the present application is shown;

[0029] Figure 3 The structure diagram of the switch module in the NFC multi-antenna switching circuit provided by another embodiment of the present application is shown;

[0030] Figure 4 The schematic diagram of the charging cabinet machine provided by the third embodiment of the present application is shown;

[0031] Figure 5 A schematic diagram of a charging cabinet provided according to a fourth embodiment of this application is shown.

[0032] Reference numerals in the attached diagram: 1. NFC multi-antenna switching circuit; 10. Control module; 11. MCU; 12. Card reader chip; 20. NFC sensing module; 21. LC filter circuit; 22. Antenna matching circuit; 30. Switch module; 31. First switch; 32. Second switch; 33. Antenna; 40. Charging cabinet; 41. Charging compartment; 42. Power bank. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] As described in the background section, existing power bank vending machines frequently experience issues with power bank retrieval and return. This is because most power bank vending machines on the market use a POGOPIN interface for data transmission. After prolonged use, the surface of the POGOPIN interface oxidizes, causing the power bank to malfunction during rental. A common solution is to incorporate an NFC antenna into the vending machine, enabling communication with the power bank via NFC technology. The POGOPIN interface is used for electrical connections and communication, typically in plugless designs. Its main characteristic is the use of spring contacts for connection, and it is widely used in various electronic devices.

[0035] Existing technology incorporates an NFC antenna in the power bank cabinet, enabling contactless communication with the power bank.

[0036] Based on this, such as Figure 1 As shown, one embodiment of this application provides an NFC multi-antenna switching circuit 1, which may include: a control module 10, multiple NFC sensing modules 20, and a switch module 30. The NFC sensing module 20 includes a first input terminal, a second input terminal, an output terminal, and two antennas 33 corresponding to the first and second input terminals respectively; the switch module 30 includes a first switch 31 and a second switch 32, each of which includes a start signal input port, N control signal input ports, and M signal output ports, where M=2. N, specifically, N≥3.

[0037] More specifically, as Figure 1 indicated, the control module 10 is configured to, after receiving the indication information that the power bank 42 is inserted into the charging compartment 41 of the charging cabinet 40, send a start signal to the start signal input port of the first switch 31 and the start signal input port of the second switch 32, according to the position of the charging compartment 41 where the power bank 42 is inserted, send a control signal for selecting a channel to the N control signal input ports of the first switch 31 and the N control signal input ports of the second switch 32, according to the control signal, determine the target signal output port of the first switch 31 and the target signal output port of the second switch 32 respectively, and output the start signal to the two input ends of the NFC induction module 20 through the two determined target signal output ports.

[0038] After the first input end and the second input end of the NFC induction module 20 respectively receive the start signal, the two antennas 33 read the electronic tag of the power bank 42 to be connected, and send the information read from the electronic tag to the control module 10 through the output end of the NFC induction module 20.

[0039] As Figure 1As shown, the working process of the above embodiment is as follows: after receiving the indication information that the power bank 42 is inserted into the charging compartment 41 of the charging cabinet 40, the control module 10 sends a starting signal to the starting signal input port of the first switch 31 and the starting signal input port of the second switch 32. The control module 10 sends a control signal for selecting a channel to the N control signal input ports of the first switch 31 and the N control signal input ports of the second switch 32 according to the position of the charging compartment 41 in which the power bank 42 is inserted. The first switch 31 and the second switch 32 determine the target signal output port of the first switch 31 and the target signal output port of the second switch 32 respectively according to the control signal. The first switch 31 and the second switch 32 output the starting signal to the two input ends of the NFC induction module 20 through the two determined target signal output ports. After receiving the starting signal by the first input end and the second input end of the NFC induction module 20, the two antennas 33 in the NFC induction module 20 read the electronic tag of the power bank 42 to be connected and send the information read from the electronic tag to the control module 10 through the output end of the NFC induction module 20. In this way, one power bank 42 corresponds to two antennas 33 in one NFC induction module 20, one output of each of the two switches corresponds to one antenna 33, and the two switches are controlled by the control module 10 at the same time, so that the two antennas 33 in one NFC induction module 20 can start the reading action of the electronic tag of the power bank 42 at the same time without starting in sequence, thereby improving the reading efficiency of the electronic tag of the power bank 42. In addition, each switch is provided with M outputs, so that only two switches need to be set to read the electronic tags of M power banks, thereby reducing the circuit cost.

[0040] Another embodiment of the present application provides an NFC multi-antenna switching circuit 1, which is based on the above embodiment and as shown in the figure. Figure 1 As shown, the control module 10 includes an MCU 11 and a card reading chip 12, the card reading chip 12 is used to read the information of the electronic tag, and the MCU 11 is used to control the card reading chip 12 to read the information of the electronic tag and send the control signal for determining the target signal output port to the first switch 31 and the second switch 32. In this way, compared with the scheme without the card reading chip 12, in the scheme with the card reading chip 12, the MUC can communicate with the power bank 42 through communication with the card reading chip 12, the pin of the used MUC is less, and the pin resource of the MCU 11 is saved.

[0041] Another embodiment of the present application provides an NFC multi-antenna switching circuit 1, further comprising a detection module for detecting the position of the power bank 42 inserted into the charging compartment 41 of the charging cabinet 40 and sending the position of the charging compartment 41 to the MCU, and then starting the control action of the MCU on the first switch and the second switch.

[0042] As shown in Figure 3 When N=3, the first switch 31 and the second switch 32 are both multi-channel switching switches with one input and eight outputs, and the multi-channel switching switches have eight signal output ports (first signal output port to eighth signal output port), that is, through the first switch and the second switch, the MCU 11 can communicate with eight power banks 42. Figure 3 Only N=3 is taken as an example for description, and in other embodiments, N has different values, and the number of power banks that can be communicated by the first switch and the second switch is different, such as N=4, and the first switch and the second switch can be one input and 16 output switches.

[0043] It is worth noting that the scheme with two multi-channel switching switches with one input and eight outputs has a total of 16 channels and can communicate with eight power banks 42.

[0044] In particular, new multi-channel switching switches can be added to the connection between the control module 10 and the first switch 31 and the second switch 32 in a nested manner to increase the number of channels and thus increase the number of power banks 42 that can communicate.

[0045] In particular, the first switch 31 and the second switch 32 can be replaced with multi-channel switching switches with more channels, thereby increasing the number of channels and thus increasing the number of power banks 42 that can communicate.

[0046] Optionally, the MCU 11 is further configured to, after receiving the indication information that the power bank 42 is inserted into the charging compartment 41 of the charging cabinet 40, control the card reading chip 12 to send a start signal to the first switch 31 and the second switch 32, and according to the position of the charging compartment 41 where the power bank 42 is inserted, send control signals to N control signal input ports of the first switch 31 and N control signal input ports of the second switch 32; the first switch 31 and the second switch 32 determine the target signal output port of the first switch 31 and the target signal output port of the second switch 32, respectively, according to the control signals, and the first switch 31 and the second switch 32 output the start signal to two input ends of the NFC induction module 20 through the two target signal output ports.

[0047] Optionally, the card reading chip 12 is a high-frequency reader-writer chip.

[0048] In particular, asFigure 1 and Figure 3 As shown in

[0049] In particular, as shown in Figure 1 and Figure 2 The output end of the NFC induction module 20 is connected to the fifth pin of the card reading chip 12, which is used to return data to the card reading chip 12. That is, the NFC induction module 20 reads the information of the electronic tag through the fifth pin of the card reading chip 12 and returns it to the card reading chip 12. The card reading chip 12 communicates with the MCU 11 through the first pin and the second pin to return the information read from the electronic tag to the MCU 11.

[0050] Optionally, the MCU 11 is a 32-bit microcontroller.

[0051] In particular, as shown in Figure 1 and Figure 3 The MCU 11 controls the high and low level states of the MCU first pin, the MCU second pin and the MCU third pin, thereby simultaneously controlling the first switch 31 and the second switch 32 to select a plurality of NFC induction modules 20, and then sending the start signal to the selected NFC induction module 20. That is, each pin has two levels, high and low, and there are three pins (the MCU first pin, the MCU second pin and the MCU third pin), so the MCU 11 can send 8 different control signals to the first switch 31 and the second switch 32, so that the first switch 31 and the second switch 32 can select the corresponding channel according to different control signals.

[0052] It is worth noting that sending the same control signal to the first switch 31 and the second switch 32 can make the first switch 31 and the second switch 32 select the same NFC induction module 20 with different antennas 33. For N = 3, the first switch 31 and the second switch 32 are an eight-way multi-channel switch, as shown in Table 1, which is a determination method of the target signal output port:

[0053] Table 1 Association table of control signal input port and target signal output port of switch

[0054]

[0055]

[0056] In particular, as shown in the above table, when the level state of the MCU first pin is low, the level state of the MCU second pin is low, and the level state of the MCU third pin is low, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both first signal output ports.

[0057] In particular, as shown in the above table, when the level state of the MCU first pin is low, the level state of the MCU second pin is low, and the level state of the MCU third pin is high, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both second signal output ports.

[0058] In particular, as shown in the above table, when the level state of the MCU first pin is low, the level state of the MCU second pin is high, and the level state of the MCU third pin is low, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both third signal output ports.

[0059] In particular, as shown in the above table, when the level state of the MCU first pin is low, the level state of the MCU second pin is high, and the level state of the MCU third pin is high, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both fourth signal output ports.

[0060] In particular, as shown in the above table, when the level state of the MCU first pin is high, the level state of the MCU second pin is low, and the level state of the MCU third pin is low, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both fifth signal output ports.

[0061] In particular, as shown in the above table, when the level state of the MCU first pin is high, the level state of the MCU second pin is low, and the level state of the MCU third pin is high, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both sixth signal output ports.

[0062] In particular, as shown in the above table, when the level state of the MCU first pin is high, the level state of the MCU second pin is high, and the level state of the MCU third pin is low, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both seventh signal output ports.

[0063] In particular, as shown in the above table, when the level state of the MCU first pin is high, the level state of the MCU second pin is high, and the level state of the MCU third pin is high, the target signal output port of the first switch 31 and the target signal output port of the second switch 32 are both eighth signal output ports.

[0064] Optionally, as shown in the above table, the NFC multi-antenna switching circuit 1 provided in another embodiment of the present application further comprises a network module for connecting to a network and sending the rental status of the power bank 42 to the MCU 11 and a cloud server.

[0065] Optionally, as shown in the above table, the NFC multi-antenna switching circuit 1 provided in another embodiment of the present application further comprises a network module for connecting to a network and sending the rental status of the power bank 42 to the MCU 11 and a cloud server. Figure 2

[0066] Notably, as shown in the above table, the LC filter circuit 21 is formed by L7, c162, c172 and L9 connected in series. Figure 2

[0067] Notably, the working process of the second embodiment of the present application is as follows: after the detection module detects that the power bank 42 is inserted into the charging compartment 41 of the charging cabinet 40, it sends an indication information to the MCU 11. The MCU 11 controls the read card chip 12 to send a start signal to the first switch 31 and the second switch 32 through the first pin and the second pin of the read card chip 12, and according to the position of the charging compartment 41 where the power bank 42 is inserted, the MCU 11 sends control signals to the N control signal input ports of the first switch 31 and the N control signal input ports of the second switch 32 through the MCU first pin, the MCU second pin and the MCU third pin. According to the control signals, the first switch 31 and the second switch 32 determine the target signal output port of the first switch 31 and the target signal output port of the second switch 32, respectively, and through the two target signal output ports, the first switch 31 and the second switch 32 output the start signal to the two input ends of the NFC induction module 20, respectively. After the first input end and the second input end of the NFC induction module 20 respectively receive the start signal, the two antennas 33 read the electronic tag of the power bank 42 to be connected, and the NFC induction module 20 sends the information read from the electronic tag to the read card chip 12 through the output end of the NFC induction module 20. The read card chip 12 then transmits the information read from the electronic tag back to the MCU 11 through the first pin and the second pin of the read card chip 12. According to the information of the electronic tag, the MCU 11 sends the rental status of the power bank 42 to the cloud server through the network module.

[0068] As shown in the above table, the NFC multi-antenna switching circuit 1 provided in another embodiment of the present application further comprises a network module for connecting to a network and sending the rental status of the power bank 42 to the MCU 11 and a cloud server. Figure 4 ​​As shown, the third embodiment of this application provides a charging cabinet 40, including: a charging compartment 41 and the NFC multi-antenna switching circuit 1.

[0069] Optionally, the number of charging compartments 41 is M, where M = 2 N , N≥3.

[0070] like Figure 5 As shown, the fourth embodiment of this application provides a charging cabinet 40, which includes a power bank 42 and the charging cabinet 40.

[0071] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0073] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0075] The technical features of the above embodiments can be combined without changing the basic principles of the present application. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.

[0076] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A NFC multi-antenna switching circuit, which is arranged in a charging cabinet machine and is used for inducting an electronic tag in a power bank, characterized in that, The NFC multi-antenna switching circuit comprises: a control module; a plurality of NFC induction modules, each of which comprises a first input end, a second input end, an output end, and two antennas corresponding to the first input end and the second input end respectively; and a switching module, which comprises a first switch and a second switch, each of which comprises an enabling signal input port, N control signal input ports, and M signal output ports, where M=2N. The first end of the control module is connected to the enabling signal input port of the first switch, and the second end of the control module is connected to the enabling signal input port of the second switch. The first end and the second end of the control module are used to send an enabling signal to the enabling signal input port of the first switch and the enabling signal input port of the second switch respectively. The control module has N control signal output ports, which are connected to the N control signal input ports of the first switch and the N control signal input ports of the second switch. The N control signal output ports are used to send a control signal to the first switch and the second switch. The M signal output ports of the first switch and the M signal output ports of the second switch are connected to the two input ends of M NFC induction modules respectively. The first switch and the second switch are used to determine a target signal output port of the first switch and a target signal output port of the second switch respectively according to the control signal, and output the enabling signal to the two input ends of the NFC induction module through the two target signal output ports. The output end of the NFC induction module is connected to the third end of the control module. When the NFC induction module receives the enabling signal, the two antennas read the electronic tag of the power bank to be connected, and send the information read from the electronic tag to the control module.

2. The NFC multiple antenna switching circuit of claim 1, wherein, The NFC multi-antenna switching circuit further comprises a detection module for detecting the position of the charging bin into which the power bank is inserted.

3. The NFC multiple antenna switching circuit of claim 1, wherein, N≥3。 4. The NFC multiple antenna switching circuit of claim 1, wherein, The first switch and the second switch are both multi-channel switching switches with eight inputs and one output.

5. The NFC multiple antenna switching circuit of claim 1, wherein, The control module comprises an MCU and a card reading chip. The card reading chip is used to read the information of the electronic tag. The MCU is used to control the card reading chip to read the information of the electronic tag and send the control signal for determining the target signal output port to the first switch and the second switch. The MCU is further configured to, after receiving the indication information that the power bank is inserted into the charging compartment of the charging cabinet, control the card reading chip to send a start signal to the first switch and the second switch, and send a control signal to N control signal input ports of the first switch and N control signal input ports of the second switch according to the position of the charging compartment into which the power bank is inserted; the first switch and the second switch determine a target signal output port of the first switch and a target signal output port of the second switch respectively according to the control signal, and output the start signal to two input ends of the NFC induction module through the two target signal output ports.

6. The NFC multiple antenna switching circuit of claim 5, wherein, The NFC multi-antenna switching circuit further comprises a network module configured to connect to a network and send the rental status of the power bank to the MCU and a cloud server.

7. The NFC multiple antenna switching circuit of claim 1, wherein, The NFC induction module further comprises an LC filter circuit and an antenna matching circuit, and the antenna matching circuit is configured to adjust a transmitting load and a resonant frequency.

8. A cabinet machine characterized by, The NFC multi-antenna switching circuit comprises: a charging compartment; and any one of claims 1 to 7.

9. The cabinet machine of claim 8, wherein, The number of the charging compartments is M, and M = 2N, where N ≥ 3.

10. The cabinet machine of claim 8, wherein, The cabinet further comprises a power bank.

Images