Passive drive circuit and lock

Abstract

The utility model provides a passive driving circuit and a lockset, the passive driving circuit comprises an antenna circuit, a power taking circuit, a communication circuit and a control circuit, and the power taking circuit is connected with the antenna circuit and stores electric energy transmitted by the antenna circuit for supplying power to a load. The communication circuit is connected with the antenna circuit, and the communication circuit can wirelessly communicate with external equipment through the antenna circuit so as to obtain control information sent by the external equipment. The control circuit comprises an MCU and a CPLD which are connected with each other, the MCU is further connected with the communication circuit and used for sending control information to the CPLD and entering a sleep mode, and the CPLD is further used for being connected with a load and controlling the load to work according to the control information. After the MCU sends the control information to the CPLD, the MCU automatically enters the sleep state, so that the power consumption of the equipment can be reduced, the running time of the equipment is prolonged, and the technical problem of high power consumption of passive equipment is solved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a passive drive circuit and a lock. Background Art

[0002] Passive devices are widely used in our daily lives. They do not require an external power source to perform their functions and generally have high reliability and a longer service life. However, during the waiting period after starting up, the operation of the passive device's internal circuits will cause a certain amount of energy loss, increasing the power consumption of the passive device. Utility Model Content

[0003] The embodiments of the present application provide a passive drive circuit and a lock, which can improve the technical problem of high power consumption of the passive drive circuit.

[0004] An embodiment of the present application provides a passive driving circuit, comprising:

[0005] Antenna circuit, used to acquire radio frequency signals in the environment and convert them into electrical energy;

[0006] a power taking circuit connected to the antenna circuit and storing the electric energy transmitted by the antenna circuit, wherein the power taking circuit is used to supply power to a load;

[0007] a communication circuit connected to the antenna circuit, wherein the communication circuit is capable of wirelessly communicating with an external device through the antenna circuit to obtain control information sent by the external device;

[0008] The control circuit includes an MCU and a CPLD connected to each other. The MCU is also connected to the communication circuit to send the control information to the CPLD and enter a sleep mode. The CPLD is also used to connect to a load and control the operation of the load according to the control information.

[0009] In some embodiments, the power supply circuit includes a speed regulation circuit and an energy storage circuit, and the speed regulation circuit is connected between the antenna circuit and the energy storage circuit;

[0010] The speed regulation circuit is also connected to the CPLD. The speed regulation circuit has multiple impedance states and can be switched under the control of the CPLD. The impedance of the speed regulation circuit in different impedance states is different.

[0011] In some embodiments, when the communication circuit communicates with the external device via the antenna circuit, the speed regulation circuit is in a first impedance state;

[0012] After the MCU enters the sleep state, the CPLD controls the speed regulation circuit to switch to the second impedance state, and the impedance of the speed regulation circuit in the second impedance state is smaller than the impedance of the speed regulation circuit in the first impedance state.

[0013] In some embodiments, the energy storage circuit can supply power to the control circuit to enable the MCU and CPLD to operate.

[0014] In some embodiments, the communication circuit includes an NFC communication circuit, which is connected to the antenna circuit and can obtain electrical energy through the antenna circuit. The NFC communication circuit can supply electrical energy to the control circuit to enable the MCU and CPLD to operate.

[0015] The present application also provides a lock, comprising:

[0016] A load, comprising a lock assembly, wherein the lock assembly has a locked state and an unlocked state;

[0017] As the passive driving circuit mentioned above, the CPLD can control the lock body assembly to switch between the locked state and the unlocked state.

[0018] The present application also provides a lock, comprising:

[0019] A housing having a mounting cavity;

[0020] a lock body assembly, partially mounted in the mounting cavity, the lock body assembly having a locked state and an unlocked state;

[0021] an antenna circuit, mounted on the housing;

[0022] a communication circuit, disposed in the mounting cavity and connected to the antenna circuit, the communication circuit being capable of wirelessly communicating with an external device via the antenna circuit to obtain control information sent by the external device;

[0023] A control circuit is provided in the installation cavity, and the control circuit includes an MCU and a CPLD connected to each other. The MCU is also connected to the communication circuit to send the control information to the CPLD and enter a sleep mode. The CPLD is also connected to the lock body assembly to receive the control information and control the lock body assembly to unlock or lock.

[0024] In some embodiments, the lock also includes a power supply circuit, which is arranged in the installation cavity. The antenna circuit is used to obtain radio frequency signals in the environment and convert them into electrical energy. The power supply circuit is connected to the antenna circuit and is used to store the electrical energy transmitted by the antenna circuit. The power supply circuit is also connected to the lock body assembly and supplies power to the lock body assembly.

[0025] In some embodiments, the power supply circuit includes a speed regulation circuit and an energy storage circuit, the speed regulation circuit is connected between the antenna circuit and the energy storage circuit, the speed regulation circuit is connected between the antenna circuit and the energy storage circuit, and the speed regulation circuit is also connected to the CPLD;

[0026] The speed regulation circuit has multiple impedance states and can be switched under the control of the CPLD, wherein the impedance of the speed regulation circuit in different impedance states is different.

[0027] In some embodiments, the lock assembly further comprises a lock body and a motor assembly that are drive-connected, the lock body portion is mounted in the mounting cavity, and the motor assembly is disposed in the mounting cavity;

[0028] The CPLD controls the motor assembly to rotate to drive the lock body to lock or unlock.

[0029] In an embodiment of the present application, a passive driving circuit includes an antenna circuit, a power supply circuit, a communication circuit, and a control circuit. The power supply circuit is connected to the antenna circuit and stores the electric energy transmitted by the antenna circuit for powering the load. The communication circuit is connected to the antenna circuit and can wirelessly communicate with an external device through the antenna circuit to obtain control information sent by the external device. The control circuit includes an MCU and a CPLD connected to each other. The MCU is also connected to the communication circuit to send control information to the CPLD and enter sleep mode. The CPLD is also used to connect to the load and control the operation of the load according to the control information. In the present application, after the MCU and the communication circuit complete communication with the external device, the MCU sends the control information to the CPLD, and the CPLD controls the operation of the load, and the MCU automatically enters sleep mode. Since the power consumption of the CPLD is much lower than that of the MCU, the overall power consumption of the passive driving circuit can be reduced without affecting the control of the load, and the operating time of the passive driving circuit can be increased, thereby improving the technical problem of high power consumption of the passive driving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a first schematic diagram of a passive driving circuit provided in an embodiment of the present application;

[0032] Figure 2 This is a second schematic diagram of the passive driving circuit provided in an embodiment of the present application;

[0033] Figure 3 This is a third schematic diagram of the passive driving circuit provided in the embodiment of the present application;

[0034] Figure 4 This is a schematic diagram of the first structure of the lock provided in the embodiment of the present application;

[0035] Figure 5 This is a second structural diagram of the lock provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0037] Please refer to Figure 1 , Figure 1 The embodiment of the present application provides a first schematic diagram of a passive driving circuit. Figure 1. The present application provides a passive driving circuit 100, which can be applied to passive devices. The passive driving circuit 100 includes an antenna circuit 11, a power supply circuit 12 and a communication circuit 13. The antenna circuit 11 is used to obtain radio frequency signals in the environment and convert them into electrical energy. The power supply circuit 12 is connected to the antenna circuit 11 and stores the electrical energy transmitted by the antenna circuit 11. The power supply circuit 12 is used to power a load 15; the communication circuit 13 is connected to the antenna circuit 11, and the communication circuit 13 can wirelessly communicate with an external device through the antenna circuit 11 to obtain control information sent by the external device. The passive drive circuit 100 also includes a control circuit 14, which includes an MCU (Microcontroller Unit) 141 and a CPLD (Complex Programmable Logic Device) 142 that are interconnected. MCU 141, also known as a microcontroller unit or single-chip microcomputer, is a powerful integrated circuit used to handle various embedded control tasks. It can interact with CPLD 142 through multiple communication interfaces to achieve complex system control and data processing. CPLD 142, also known as a complex programmable logic device, is an integrated circuit mainly used to implement digital logic circuits. It is a programmable logic device that allows users to configure its internal logic functions as needed. CPLD 142 is a technology between a logic gate array (LGA) and a field programmable gate array (FPGA), providing higher logic density than LGA but with a simpler programming and configuration process than FPGA. The power consumption of CPLD 142 is much lower than that of MCU 141.

[0038] In the present application, MCU141 is connected to the communication circuit 13 to send the control information to CPLD142 and enter sleep mode. The CPLD142 is also used to connect to the load 15 and control the operation of the load 15 according to the control information. It is understandable that during the waiting process after the passive device is started, the MCU141 still needs to run, and the operation of the MCU141 will cause a certain amount of energy loss, which increases the power consumption of the passive device. In the present application, after the MCU141 sends the control information to the CPLD142, the CPLD142 controls the operation of the load, and the MCU141 automatically enters the sleep state. Since the power consumption of the CPLD142 is much lower than that of the MCU141, the overall power consumption of the passive drive circuit can be reduced without affecting the control of the load, thereby increasing the operating time of the passive drive circuit.

[0039] Among them, the antenna circuit 11 can be an NFC antenna circuit. NFC (Near Field Communication, NFC), also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that allows contactless point-to-point data transmission and exchange between electronic devices. The NFC antenna circuit 11 can receive wireless signals sent by mobile devices and convert them into electrical energy. The antenna circuit 11 can be composed of a coil with multiple turns. The function of the coil is mainly to receive and send communication signals to realize functions such as data transmission and / or identity authentication between devices. The coil can also transmit electrical energy, such as receiving radio frequency energy in the environment and converting it into electrical energy.

[0040] In some embodiments, the communication circuit 13 and the MCU 141 are connected via I 2 C (Inter-Integrated Circuit) interface for communication, I 2 C is a simple and effective serial communication protocol suitable for data transmission between short-distance devices. The communication circuit 13 communicates with the external device through the antenna circuit 11, and then the MCU141 communicates with the external device through I 2 C communicates with the communication circuit 13, and then communicates with the external device. When the MCU141 receives the instruction of the external device to the load 15, it communicates with the CPLD142 through I 2 C (Inter-Integrated Circuit) interface for communication. MCU141 sends data to CPLD142 through the selected interface to ensure that the data can be correctly parsed and used.

[0041] Please refer to Figure 2 , Figure 2 This is a schematic diagram of a second passive drive circuit provided in an embodiment of the present application. In some embodiments, the power supply circuit 12 includes a speed control circuit 121 and an energy storage circuit 122. The speed control circuit 121 is connected between the antenna circuit 11 and the energy storage circuit 122. The speed control circuit 121 is also connected to the CPLD 142. The speed control circuit 121 has multiple impedance states and switches under the control of the CPLD 142.

[0042] Specifically, the energy storage circuit 122 is electrically connected to the antenna circuit 11 to store electrical energy or electrical signals. It is understandable that the energy storage circuit 122 stores the electrical signal converted by the antenna circuit 11 for use by the load 15 in the passive device. In some examples, the energy storage circuit 122 may include a storage unit, and the storage unit may include one or more energy storage capacitors. In some examples, the energy storage circuit 122 may also include a voltage stabilizing unit, and the storage unit is connected to the voltage stabilizing unit. The voltage stabilizing unit detects the electrical signal of the storage unit and feeds it back to the input end of the voltage stabilizing unit, compares it with the reference voltage in the comparator, and then adjusts it to make the storage unit output a stable voltage signal.

[0043] In some embodiments, the passive driving circuit 100 further includes a rectifier circuit connected between the antenna circuit 11 and the energy storage circuit 122. Because the power converted by the antenna circuit 11 is unstable, the rectifier circuit can rectify the power of the antenna circuit 11 to obtain stable power after rectification. In some examples, the rectifier circuit can be a diode or a rectifier bridge circuit.

[0044] In some embodiments, when the communication circuit 13 communicates with an external device via the antenna circuit 11, the speed control circuit 121 is in a first impedance state. When the MCU 141 enters a sleep state, the CPLD 142 controls the speed control circuit 121 to switch to a second impedance state. The impedance of the speed control circuit 121 in the second impedance state is lower than the impedance of the speed control circuit 121 in the first impedance state. That is, when the communication circuit 13 communicates with an external device via the antenna circuit 11, the impedance of the speed control circuit 121 is higher, thereby providing a lower charging current to the energy storage circuit 122 and less interference to communication. When the MCU 141 enters a sleep state, it can be understood that there is no need to communicate with an external device or that there is less communication with the external device. At this time, the impedance of the speed control circuit 121 is lower, thereby providing a higher charging current to the energy storage circuit 122, allowing the energy storage circuit 122 to be charged more quickly.

[0045] It can be understood that the energy storage circuit 122 can store the electrical energy obtained by the antenna circuit 11. The speed regulation circuit 121 is connected between the antenna circuit 11 and the energy storage circuit 122. The speed regulation circuit 121 can dynamically adjust the impedance, thereby changing the voltage or current supplied to the energy storage circuit 122, thereby meeting the voltage or current requirements of the energy storage circuit 122 and realizing stable, reliable and efficient dynamic power storage.

[0046] Specifically, when the communication circuit 13 communicates with an external device via the antenna circuit 11, the speed control circuit 121 is in a first impedance state, in which the impedance is relatively high, and the speed control circuit 121 controls the power supply rate of the energy storage circuit 122 to be the first rate. When the MCU 141 enters a sleep state, at which point the communication is complete, the CPLD 142 controls the speed control circuit 121 to switch to a second impedance state, in which the impedance is relatively low, and the speed control circuit 121 controls the power supply rate of the energy storage circuit 122 to be the second rate. Since the impedance in the second impedance state is lower than that in the first impedance state, the second rate is greater than the first rate, and the power supply rate is relatively high.

[0047] It will be appreciated that the speed control circuit 121 in the above embodiment may include multiple branches, with different branches having different impedances. For example, the speed control circuit 121 may include two branches, one of which may include a switch and the other may include a resistor. When the switch is off, the branch including the resistor is connected between the antenna circuit 11 and the energy tank circuit 122. When the switch is on, the impedance of the switch is much smaller than that of the resistor, and the branch containing the switch is connected between the antenna circuit 11 and the energy tank circuit 122. For another example, the speed control circuit 121 includes multiple branches, the first branch includes a first switch tube and a first resistor R1, the second branch includes a second switch tube and a second resistor R2, and the third branch includes a switch tube. When the first switch tube is turned on and the second and third switch tubes are turned off, the first branch (i.e., the first resistor) is connected between the antenna circuit 11 and the energy storage circuit 122. When the second switch tube is turned on and the first and third switch tubes are turned off, the second branch (i.e., the second resistor) is connected between the antenna circuit 11 and the energy storage circuit 122. When the third switch tube is turned on, the third branch is connected between the antenna circuit 11 and the energy storage circuit 122. It should be noted that the branches of the speed control circuit 121 can also adopt other structures, which are not limited here.

[0048] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a third passive driving circuit provided by an embodiment of the present application. In some embodiments, the energy storage circuit 122 can supply power to the control circuit 14 to enable the MCU 141 and the CPLD 142 to operate.

[0049] In some examples, the passive driving circuit 100 further includes a driving circuit. The antenna circuit 11 is capable of capturing micro-energy in the environment and converting it into electrical energy. The energy storage circuit 122 stores this electrical energy and supplies power to the load 15. The control circuit 14 outputs a pulse adjustment control signal to the driving circuit to operate the driving circuit. The driving circuit does not consume all the electrical energy stored in the energy storage circuit 122. After the driving circuit completes its operation, some electrical energy remains in the energy storage circuit 122, which can then supply power to the control circuit 14. This prevents the passive driving circuit 100 from suddenly becoming de-energized, causing the entire passive circuit to suddenly lose power and become uncontrollable.

[0050] In some embodiments, the communication circuit 13 includes an NFC communication circuit 13, which is connected to the antenna circuit 11 and can obtain electrical energy through the antenna circuit 11. The NFC communication circuit 13 can supply electrical energy to the control circuit 14 to enable the MCU141 and CPLD142 to work.

[0051] In some examples, when the passive device is powered off, the NFC communication circuit 13 can act as a power generator and the control circuit 14 can act as a load 15. The voltage signal generated by the NFC communication circuit 13 is directly provided to the control circuit 14, causing the control circuit 14 to initialize and then control the energy storage circuit 122 to power the passive device.

[0052] In some examples, the NFC communication circuit 13 includes an NFC chip. The electrical energy converted by the antenna circuit 11 powers the NFC chip, enabling the chip to exchange data with an external device, such as performing external device identity authentication, receiving instructions, or providing feedback on the status of the communication circuit 13. In some examples, the communication circuit 13 may also include a capacitor for storing electrical energy to power the NFC chip.

[0053] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the first structure of a lock provided in an embodiment of the present application. This application also provides a lock 200, which can be a passive padlock, a passive seal lock, or a passive box lock. The lock includes a load 15, which includes a lock body assembly 201. The lock body assembly 201 has a locked state and an unlocked state. The lock 200 also includes the passive drive circuit 100 described above. The CPLD 142 of the passive drive circuit 100 is capable of controlling the lock body assembly 201 to switch between the locked and unlocked states.

[0054] Please refer to Figure 5 , Figure 5This is a second structural diagram of the lock provided by the embodiment of the present application. The present application also provides a lock 200, which can be a passive padlock, a passive seal lock, a passive box lock, etc. The lock 200 includes a shell and a lock body assembly 201, and the shell includes a bottom wall and a side wall, and the side wall is arranged around the bottom wall and forms an installation cavity. The lock body assembly 201 is partially installed in the installation cavity, and the lock body assembly 201 has a locked state and an unlocked state. The lock also includes an antenna circuit 11 and a communication circuit 13, the antenna circuit 11 is installed in the shell, the communication circuit 13 is arranged in the installation cavity and connected to the antenna circuit 11, and the communication circuit 13 can communicate wirelessly with an external device through the antenna circuit 11 to obtain control information sent by the external device. The lock also includes a control circuit 14, which is arranged in the installation cavity. The control circuit 14 includes an MCU141 and a CPLD142 connected to each other. The MCU141 is also connected to the communication circuit 13 to send the control information to the CPLD142 and enter the sleep mode. The CPLD142 is also connected to the lock body assembly 201 to receive the control information and control the lock body assembly 201 to unlock or lock.

[0055] As will be appreciated, after MCU 141 and communication circuit 13 complete communication with the external device, MCU 141 sends control information to CPLD 142, which then controls whether the lock is unlocked or locked, and MCU 141 enters a sleep state. Because CPLD 142 consumes much less power than MCU 141, overall power consumption can be reduced without affecting lock control, increasing the lock's operating time and thus addressing the technical issue of high power consumption.

[0056] In some embodiments, the lock 200 also includes a power supply circuit 12, which is arranged in the installation cavity. The antenna circuit 11 is used to obtain radio frequency signals in the environment and convert them into electrical energy. The power supply circuit 12 is connected to the antenna circuit 11 and is used to store the electrical energy transmitted by the antenna circuit 11. The power supply circuit 12 is also connected to the lock body assembly 201 and supplies power to the lock body assembly 201.

[0057] In some embodiments, the power supply circuit 12 includes a speed regulation circuit 121 and an energy storage circuit 122. The speed regulation circuit 121 is connected between the antenna circuit 11 and the energy storage circuit 122. The speed regulation circuit 121 is also connected to the CPLD 142. The speed regulation circuit 121 has multiple impedance states and can be switched under the control of the CPLD 142. The impedance of the speed regulation circuit 121 in different impedance states is different.

[0058] In some embodiments, the lock body assembly 201 further includes a drive-connected lock body and a motor assembly, the motor assembly is disposed in the mounting cavity, the lock body assembly 201 is connected to the motor assembly, and the CPLD 142 controls the rotation of the motor assembly to drive the lock body to lock or unlock.

[0059] In some examples, the lock body of the lock body assembly 201 also includes a lock beam and a conversion part. The lock beam portion is located in the installation cavity, and the conversion part is arranged in the installation cavity. CPLD142 controls the motor assembly to drive the conversion part to rotate, so that the conversion part and the lock beam cooperate to achieve unlocking or locking of the lock, thereby achieving unlocking or locking state switching.

[0060] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A passive driving circuit, characterized in that: include: Antenna circuit, used to acquire radio frequency signals in the environment and convert them into electrical energy; a power taking circuit connected to the antenna circuit and storing the electric energy transmitted by the antenna circuit, wherein the power taking circuit is used to supply power to a load; a communication circuit connected to the antenna circuit, wherein the communication circuit is capable of wirelessly communicating with an external device through the antenna circuit to obtain control information sent by the external device; The control circuit includes an MCU and a CPLD connected to each other. The MCU is also connected to the communication circuit to send the control information to the CPLD and enter a sleep mode. The CPLD is also used to connect to a load and control the operation of the load according to the control information.

2. The passive driving circuit according to claim 1, wherein: The power taking circuit includes a speed regulating circuit and an energy storage circuit, and the speed regulating circuit is connected between the antenna circuit and the energy storage circuit; The speed regulation circuit is also connected to the CPLD. The speed regulation circuit has multiple impedance states and can be switched under the control of the CPLD. The impedance of the speed regulation circuit in different impedance states is different.

3. The passive driving circuit according to claim 2, characterized in that: When the communication circuit communicates with the external device via the antenna circuit, the speed regulation circuit is in a first impedance state; After the MCU enters the sleep state, the CPLD controls the speed regulation circuit to switch to the second impedance state, and the impedance of the speed regulation circuit in the second impedance state is smaller than the impedance of the speed regulation circuit in the first impedance state.

4. The passive driving circuit according to claim 2, wherein: The energy storage circuit can supply power to the control circuit to enable the MCU and CPLD to operate.

5. The passive driving circuit according to claim 1, wherein: The communication circuit includes an NFC communication circuit, which is connected to the antenna circuit and can obtain electrical energy through the antenna circuit. The NFC communication circuit can supply electrical energy to the control circuit to enable the MCU and CPLD to work.

6. A lock, characterized in that: include: A load, comprising a lock assembly, wherein the lock assembly has a locked state and an unlocked state; The passive driving circuit according to any one of claims 1 to 5, wherein the CPLD is capable of controlling the lock body assembly to switch between a locked state and an unlocked state.

7. A lock, characterized in that: include: A housing having a mounting cavity; a lock body assembly, partially mounted in the mounting cavity, the lock body assembly having a locked state and an unlocked state; an antenna circuit, mounted on the housing; a communication circuit, disposed in the mounting cavity and connected to the antenna circuit, the communication circuit being capable of wirelessly communicating with an external device via the antenna circuit to obtain control information sent by the external device; A control circuit is provided in the installation cavity, and the control circuit includes an MCU and a CPLD connected to each other. The MCU is also connected to the communication circuit to send the control information to the CPLD and enter a sleep mode. The CPLD is also connected to the lock body assembly to receive the control information and control the lock body assembly to unlock or lock.

8. The lock according to claim 7, characterized in that: The lock also includes a power supply circuit, which is arranged in the installation cavity. The antenna circuit is used to obtain radio frequency signals in the environment and convert them into electrical energy. The power supply circuit is connected to the antenna circuit and is used to store the electrical energy transmitted by the antenna circuit. The power supply circuit is also connected to the lock body assembly and supplies power to the lock body assembly.

9. The lock according to claim 8, characterized in that: The power taking circuit includes a speed regulating circuit and an energy storage circuit, wherein the speed regulating circuit is connected between the antenna circuit and the energy storage circuit, and the speed regulating circuit is also connected to the CPLD; The speed regulation circuit has multiple impedance states and can be switched under the control of the CPLD, wherein the impedance of the speed regulation circuit in different impedance states is different.

10. The lock according to claim 7, characterized in that: The lock assembly further comprises a lock body and a motor assembly connected in a driving manner, wherein the lock body portion is installed in the installation cavity, and the motor assembly is arranged in the installation cavity; The CPLD controls the motor assembly to rotate to drive the lock body to lock or unlock.

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