A control circuit board integrating key function and NFC function and a smart door lock

Abstract

This utility model discloses a control circuit board and smart lock integrating button and NFC functions. The circuit board includes a circuit board control chip, an NFC unit, and a button unit. The NFC unit and the button unit are electrically connected to the circuit board control chip. The NFC unit is used for NFC unlocking, and the button unit is used for button interaction. The NFC unit, button unit, and circuit board control chip are integrated on the same PCB board. By integrating the NFC unit, button unit, and circuit board control chip on the same PCB board, not only are the functions of the main control circuit board improved, but the integration level of the smart lock is also improved, the number of circuit boards is reduced, and the space occupied is reduced.

Description

Technical Field

[0001] This utility model relates to the field of circuit board integration technology for smart door locks, and in particular to a control circuit board and smart door lock that integrates button function and NFC function. Background Technology

[0002] Smart locks offer a variety of unlocking methods, including NFC, password, fingerprint, facial recognition, palm vein recognition, one-touch unlocking, remote unlocking, and more. NFC is a short-range wireless communication technology that allows electronic devices to transmit data contactlessly within a range of 10 centimeters or even less. It is based on radio frequency identification (RFID) technology but is more powerful, capable of not only reading information but also bidirectional data transmission, simulating smart cards, and even controlling smart devices. Capacitive touch buttons operate on the principle of capacitive sensing technology, detecting changes in capacitance caused by a person's proximity or touch to activate the button's function.

[0003] While current smart locks offer a variety of functions and provide users with multiple unlocking methods, they also make their electronic control systems more complex, less integrated, and require more space. Utility Model Content

[0004] Existing smart door locks have numerous unlocking methods, complex structures, and large space requirements.

[0005] To address the aforementioned issues, a control circuit board and smart lock integrating button and NFC functions are proposed. By integrating the NFC unit, button unit, and circuit board control chip on the same PCB board, the functionality of the main control circuit board is enhanced, the integration level of the smart lock is improved, the number of circuit boards is reduced, and the space occupied is reduced.

[0006] In a first aspect, a control circuit board integrating button function and NFC function includes:

[0007] Circuit board control chip;

[0008] NFC unit;

[0009] Button unit;

[0010] The NFC unit and the button unit are electrically connected to the circuit board control chip, respectively.

[0011] The NFC unit is used for NFC unlocking, and the button unit is used for button interaction.

[0012] The NFC unit, the button unit, and the circuit board control chip are integrated on the same PCB board.

[0013] In a first possible embodiment of the control circuit board integrating button and NFC functions described in this utility model, the NFC unit includes:

[0014] First radio frequency transmitting circuit;

[0015] Second radio frequency transmitting circuit;

[0016] Radio frequency antenna;

[0017] One end of the first radio frequency transmitting circuit and the second radio frequency transmitting circuit are electrically connected to the radio frequency antenna;

[0018] The other ends of the first and second radio frequency transmitting circuits are electrically connected to the control chip of the circuit board, respectively.

[0019] In conjunction with the first possible embodiment of this utility model, in the second possible embodiment, the NFC unit further includes:

[0020] Reference voltage circuit;

[0021] Radio frequency receiving circuit;

[0022] One end of the radio frequency receiving circuit is electrically connected to the radio frequency antenna, and the other end of the radio frequency receiving circuit is electrically connected to the circuit board control chip;

[0023] The reference voltage circuit is electrically connected to the second radio frequency transmitting circuit through the radio frequency receiving circuit.

[0024] In a third possible embodiment of the control circuit board integrating button and NFC functions described in this utility model, the button unit includes:

[0025] Multiple touch button circuits;

[0026] The multiple touch button circuits are electrically connected to the corresponding pins of the control chip on the circuit board.

[0027] In conjunction with the second possible embodiment of this utility model, and in the fourth possible embodiment, the first radio frequency transmitting circuit includes:

[0028] First capacitor and first inductor;

[0029] The first capacitor and the first inductor are connected in series to form a first LC circuit;

[0030] One end of the first LC circuit is electrically connected to the radio frequency antenna, and the other end of the first LC circuit is electrically connected to the circuit board control chip.

[0031] In conjunction with the fourth possible embodiment of this utility model, and in the fifth possible embodiment, the second radio frequency transmitting circuit includes:

[0032] The second capacitor and the second inductor;

[0033] The second capacitor and the second inductor are connected in series to form a second LC circuit;

[0034] One end of the second LC circuit is electrically connected to the radio frequency antenna, and the other end of the second LC circuit is electrically connected to the circuit board control chip.

[0035] In conjunction with the fifth possible embodiment of this utility model, and in the sixth possible embodiment, the radio frequency receiving circuit includes:

[0036] First resistor and third capacitor;

[0037] The first resistor and the third capacitor are connected in series to form an RC circuit;

[0038] One end of the RC circuit is electrically connected to the radio frequency antenna, and the other end of the RC circuit is electrically connected to the circuit board control chip.

[0039] In conjunction with the sixth and seventh possible embodiments of this utility model, the reference voltage circuit includes:

[0040] Second resistor;

[0041] One end of the second resistor is electrically connected to one end of the first resistor, and the other end is electrically connected to the control chip of the circuit board.

[0042] In conjunction with the third possible embodiment of this utility model, the eighth possible embodiment includes:

[0043] Touch buttons and voltage regulator resistors;

[0044] The touch button is electrically connected to one end of the voltage regulator resistor, and the other end of the voltage regulator resistor is electrically connected to the circuit board control chip.

[0045] Secondly, a smart door lock includes a control circuit board with integrated button and NFC functions as described in the first aspect.

[0046] The control circuit board and smart lock that integrate button and NFC functions described in this utility model integrate the NFC unit, button unit, and circuit board control chip on the same PCB board. This not only enhances the functionality of the main control circuit board but also improves the integration level of the smart lock, reduces the number of circuit boards, and reduces space occupation. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a logic circuit diagram of the control circuit board that integrates button function and NFC function in this utility model.

[0049] Figure 2 This is a circuit diagram of the control circuit board that integrates button and NFC functions in this utility model.

[0050] Components and their serial numbers:

[0051] 100 – Main control circuit board, 110 – NFC unit, 120 – Main control circuit board chip, 130 – Button unit. Detailed Implementation

[0052] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this utility model.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0054] 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 or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0055] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] 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 one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] Existing smart door locks have numerous unlocking methods, complex structures, and large space requirements.

[0058] To address the aforementioned issues, a control circuit board and smart lock integrating button and NFC functions are proposed.

[0059] Firstly, a control circuit board integrating button and NFC functions, such as... Figure 1 , Figure 1 This is a logic circuit diagram of the control circuit board integrating button and NFC functions in this utility model; it includes a circuit board control chip 120U1, an NFC unit 110, and a button unit 130; the NFC unit 110 and the button unit 130 are electrically connected to the circuit board control chip 120U1 respectively; the NFC unit 110 is used for NFC unlocking, and the button unit 130 is used for button interaction; the NFC unit 110, the button unit 130, and the circuit board control chip 120U1 are integrated on the same PCB board.

[0060] In this embodiment, by integrating the NFC unit 110, the button unit 130, and the circuit board control chip 120U1 onto the same PCB board, not only are the functions of the main control circuit board 100 improved, but the integration level of the smart door lock is also enhanced, the number of circuit boards is reduced, and the space occupied is reduced.

[0061] In one specific embodiment, the NFC unit 110 includes a first radio frequency transmitting circuit, a second radio frequency transmitting circuit, and a radio frequency antenna; one end of the first radio frequency transmitting circuit and the second radio frequency transmitting circuit is electrically connected to the radio frequency antenna; the other end of the first radio frequency transmitting circuit and the second radio frequency transmitting circuit are respectively electrically connected to the circuit board control chip 120U1.

[0062] In one specific embodiment, the NFC unit 110 further includes a reference voltage circuit and a radio frequency receiving circuit; one end of the radio frequency receiving circuit is electrically connected to the radio frequency antenna, and the other end of the radio frequency receiving circuit is electrically connected to the circuit board control chip 120U1; the reference voltage circuit is electrically connected to the second radio frequency transmitting circuit through the radio frequency receiving circuit.

[0063] In one specific embodiment, the button unit 130 includes a plurality of touch button circuits; the plurality of touch button circuits are electrically connected to the pins corresponding to the circuit board control chip 120U1.

[0064] In one specific implementation, such as Figure 2 , Figure 2 This is a circuit diagram of the control circuit board integrating button and NFC functions in this utility model. The first radio frequency transmitting circuit includes a first capacitor C34 and a first inductor L2; the first capacitor C34 and the first inductor L2 are connected in series to form a first LC circuit; one end of the first LC circuit is electrically connected to the radio frequency antenna, and the other end of the first LC circuit is electrically connected to the circuit board control chip 120U1.

[0065] In one specific embodiment, the second radio frequency transmitting circuit includes a second capacitor C35 and a second inductor L3; the second capacitor C35 and the second inductor L3 are connected in series to form a second LC circuit; one end of the second LC circuit is electrically connected to the radio frequency antenna, and the other end of the second LC circuit is electrically connected to the circuit board control chip 120U1.

[0066] In one specific embodiment, the radio frequency receiving circuit includes a first resistor R15 and a third capacitor C29; the first resistor R15 and the third capacitor C29 are connected in series to form an RC circuit; one end of the RC circuit is electrically connected to the radio frequency antenna, and the other end of the RC circuit is electrically connected to the circuit board control chip 120U1.

[0067] In one specific embodiment, the reference voltage circuit includes a second resistor R14; one end of the second resistor R14 is electrically connected to one end of the first resistor R15, and the other end is electrically connected to the circuit board control chip 120U1.

[0068] In one specific embodiment, the touch button circuit includes a touch button and a voltage regulator resistor; the touch button is electrically connected to one end of the voltage regulator resistor, and the other end of the voltage regulator resistor is electrically connected to the circuit board control chip 120U1. For example... Figure 2 The touch buttons are TOUCH0-TOUCH11, and the voltage regulating resistors include R16-R27.

[0069] In this embodiment, TOUCH0 to TOUCH11 in the schematic diagram represent 12 touch button channels, corresponding to buttons 0 to 9, the back button, and the confirm button. When a human touches a button, the capacitance value of the corresponding button changes, resulting in an analog signal. This analog signal, in the form of a voltage value, is acquired and quantized by the chip 120U1FM5114B. The quantized data is then transmitted to the MCU (main control circuit board 100 chip 120U1) via I2C communication, and the MCU then performs the corresponding operation.

[0070] The NFC RF transmitting circuit has TX1 and TX2 as the RF transmitting I / O ports, and RX as the RF receiving I / O port. L2, L3, C30, C31, C34, C35, C36, C37, and the RF antenna (onboard coil) together form the RF transmitting circuit. C29, R15, and the components shared with the transmitting circuit constitute the RF receiving circuit. The VMID internal reference voltage provides a reference voltage for the RF circuit. When our M1 card is close to our NFC onboard coil (the 13.56MHz carrier frequency current generates an electric field in the coil), the M1 card generates an induced current in the electric field; this current is the M1 card's operating current. Stacking NFC and touch button functions on the same PCB helps reduce the space occupied by the smart lock and improves its integration level.

[0071] Secondly, a smart door lock includes a control circuit board that integrates button functionality and NFC functionality as described in the first aspect.

[0072] The control circuit board and smart lock that integrate button and NFC functions according to this utility model integrate the NFC unit 110, button unit 130 and circuit board control chip 120U1 on the same PCB board. This not only enhances the functions of the main control circuit board 100, but also improves the integration level of the smart lock, reduces the number of circuit boards, and reduces space occupation.

[0073] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A control circuit board integrating button function and NFC function, characterized in that it comprises: Circuit board control chip; NFC unit; Button unit; The NFC unit and the button unit are electrically connected to the circuit board control chip, respectively. The NFC unit is used for NFC unlocking, and the button unit is used for button interaction. The NFC unit, the button unit, and the circuit board control chip are integrated on the same PCB board.

2. The control circuit board integrating button function and NFC function according to claim 1, characterized in that, The NFC unit includes: First radio frequency transmitting circuit; Second radio frequency transmitting circuit; Radio frequency antenna; One end of the first radio frequency transmitting circuit and the second radio frequency transmitting circuit are electrically connected to the radio frequency antenna; The other ends of the first and second radio frequency transmitting circuits are electrically connected to the control chip of the circuit board, respectively.

3. The control circuit board integrating button function and NFC function according to claim 2, characterized in that, The NFC unit also includes: Reference voltage circuit; Radio frequency receiving circuit; One end of the radio frequency receiving circuit is electrically connected to the radio frequency antenna, and the other end of the radio frequency receiving circuit is electrically connected to the circuit board control chip; The reference voltage circuit is electrically connected to the second radio frequency transmitting circuit through the radio frequency receiving circuit.

4. The control circuit board integrating button function and NFC function according to claim 1, characterized in that, The button unit includes: Multiple touch button circuits; The multiple touch button circuits are electrically connected to the corresponding pins of the control chip on the circuit board.

5. The control circuit board integrating button function and NFC function according to claim 3, characterized in that, The first radio frequency transmitting circuit includes: First capacitor and first inductor; The first capacitor and the first inductor are connected in series to form a first LC circuit; One end of the first LC circuit is electrically connected to the radio frequency antenna, and the other end of the first LC circuit is electrically connected to the circuit board control chip.

6. The control circuit board integrating button function and NFC function according to claim 5, characterized in that, The second radio frequency transmitting circuit includes: The second capacitor and the second inductor; The second capacitor and the second inductor are connected in series to form a second LC circuit; One end of the second LC circuit is electrically connected to the radio frequency antenna, and the other end of the second LC circuit is electrically connected to the circuit board control chip.

7. The control circuit board integrating button function and NFC function according to claim 6, characterized in that, The radio frequency receiving circuit includes: First resistor and third capacitor; The first resistor and the third capacitor are connected in series to form an RC circuit; One end of the RC circuit is electrically connected to the radio frequency antenna, and the other end of the RC circuit is electrically connected to the circuit board control chip.

8. The control circuit board integrating button function and NFC function according to claim 7, characterized in that, The reference voltage circuit includes: Second resistor; One end of the second resistor is electrically connected to one end of the first resistor, and the other end is electrically connected to the control chip of the circuit board.

9. The control circuit board integrating button function and NFC function according to claim 4, characterized in that, The touch button circuit includes: Touch buttons and voltage regulator resistors; The touch button is electrically connected to one end of the voltage regulator resistor, and the other end of the voltage regulator resistor is electrically connected to the circuit board control chip.

10. A smart door lock, characterized in that, The control circuit board comprising the integrated button function and NFC function as described in any one of claims 1-9.

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