CN212391825U - Safe intelligent lock based on NFC energy taking - Google Patents
Safe intelligent lock based on NFC energy taking Download PDFInfo
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- CN212391825U CN212391825U CN202021305820.9U CN202021305820U CN212391825U CN 212391825 U CN212391825 U CN 212391825U CN 202021305820 U CN202021305820 U CN 202021305820U CN 212391825 U CN212391825 U CN 212391825U
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Abstract
The utility model provides a safe intelligence lock based on NFC gets ability belongs to the intelligence lock field. The intelligence lock includes: the lock body comprises a shell and a switch lock actuating mechanism; the control system comprises an NFC energy-taking module and a safety module; the NFC energy-taking module comprises a micro control unit and an NFC antenna connected with the micro control unit; the safety module is connected with the micro control unit and is used for carrying out identity authentication on unlocking equipment; the NFC energy-taking module is in near field communication with the unlocking equipment through the NFC antenna and obtains electric energy from the unlocking equipment so as to start the switch lock executing mechanism. The intelligent lock of the utility model realizes the safety certification of unlocking through the safety module based on NFC energy taking and communication, thereby avoiding unauthorized unlocking operation; get through NFC and provide the electric energy of unblanking, need not to install the battery, prolong the life of intelligent lock, avoid the maintenance work that the battery is ageing to be brought.
Description
Technical Field
The utility model relates to an intelligence lock field specifically relates to a safe intelligence lock based on NFC gets ability.
Background
With the rapid development of science and technology, intelligent electronic locks are widely applied in various fields, such as the field of intelligent power grids. In the modern and intelligent development process of a power grid, locks with safety protection functions are needed in various doors of a metering cabinet and a distribution network, such as an opening and closing station, a ring main unit, a switching station, a cable branch box and the like. The universal mechanical lock is easy to copy mechanical keys, poor in confidentiality and not suitable for smart grid places with high requirements on confidentiality and management functions. The existing intelligent lock is subjected to safety protection through an electronic password or is unlocked in a Bluetooth communication mode, although the technical difficulty of unlocking the lock is improved, a battery needs to be installed inside the lock, the service life of the battery is generally 3-5 years, the service life of the lock is limited, and more maintenance cost is brought by replacing the battery.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a safe intelligence lock based on NFC gets ability realizes the safety certificate of the operation of unblanking, and through the NFC power supply, need not to install the battery, can prolong the life of intelligence lock.
In order to realize the above-mentioned purpose, the utility model provides a safe intelligence lock based on NFC can be got, include:
the lock body comprises a shell and a switch lock actuating mechanism;
the control system comprises an NFC energy-taking module and a safety module;
the NFC energy-taking module comprises a micro control unit and an NFC antenna connected with the micro control unit;
the safety module is connected with the micro control unit and is used for carrying out identity authentication on unlocking equipment;
the NFC energy-taking module is in near field communication with the unlocking equipment through the NFC antenna and obtains electric energy from the unlocking equipment so as to start the switch lock executing mechanism.
Further, the switch lock actuating mechanism comprises: the locking rod, the cross shaft, the reset pressure spring and the motor are arranged on the frame;
the reset compression spring comprises a first compression spring and a second compression spring;
the lock rod is provided with a first groove, and one end of the lock rod is connected with the second pressure spring;
one end of the transverse shaft is embedded into the first groove, and the other end of the transverse shaft is connected with the first pressure spring;
the motor is used for providing power for the transverse shaft to move towards the first pressure spring so as to enable the transverse shaft to move out of the first groove, and therefore the lock rod is enabled to bounce under the action of the reset force of the second pressure spring.
Furthermore, the switch lock actuating mechanism also comprises a positioning pin shaft, and the lock rod is provided with a second groove;
and the positioning pin shaft is matched with the second groove and used for limiting the downward displacement of the lock rod.
Further, the control system also comprises a state detection module;
the state detection module is in signal connection with the micro control unit and is used for detecting whether the cross shaft is moved out of the first groove or not and whether the lock rod is bounced or not.
Further, the state detection module comprises a first Hall element and a second Hall element;
the first Hall element is close to the transverse shaft and used for detecting the change of the magnetic field between the first Hall element and the transverse shaft;
the second Hall element is close to one end, connected with the second pressure spring, of the lock rod and used for detecting the change of the magnetic field between the second Hall element and the lock rod;
the micro control unit determines the position of the cross shaft according to the magnetic field change detected by the first Hall element so as to judge whether the cross shaft moves out of the first groove or not, and determines the position of the lock rod according to the magnetic field change detected by the second Hall element so as to judge whether the lock rod bounces or not.
Further, the control system also comprises a voltage stabilizing module and a motor driving module;
the input end of the voltage stabilizing module is connected with the micro control unit, and the output end of the voltage stabilizing module is connected with the motor driving module and the safety module;
the motor driving module is connected with the motor.
Further, the NFC antenna comprises an NFC data receiving coil, an NFC data sending coil and an NFC energy-taking coil.
Furthermore, the NFC data receiving coil, the NFC data transmitting coil and the NFC energy-taking coil are respectively connected with the radio frequency interface of the micro control unit.
Further, the control system is integrated on a control circuit board, and the control circuit board is installed in the shell.
Furthermore, one end of the control circuit board is close to the transverse shaft, and the other end of the control circuit board is close to one end of the lock rod, which is connected with the second pressure spring;
the first Hall element is welded at one end, close to the transverse shaft, of the control circuit board, and the second Hall element is welded at one end, close to the lock rod, of the control circuit board.
The intelligent lock of the utility model realizes the safety certification of unlocking through the safety module based on NFC energy taking and communication, thereby avoiding unauthorized unlocking operation; get through NFC and provide the electric energy of unblanking, need not to install the battery, prolong the life of intelligent lock, avoid the maintenance work that the battery is ageing to be brought.
The utility model discloses a built-in security chip of intelligence lock is as authority authentication, and security authentication's assurance channel cooperates corresponding key management system, authority management system, through corresponding management system, interface, realizes long-range issue, personnel's management of the authority of equipment such as measurement box, switch board, provides effective technical guarantee for electrical equipment's safe operation, the precaution of stealing the electric accident. For example, the master station system performs one-to-one association between the electronic key of the intelligent lock and the unlocking relationship of the intelligent lock, provides unlocking authorization data according to the association relationship, and performs identity authentication between the devices by using a symmetric key based on the SM1 algorithm, thereby ensuring the validity of the electronic key. The intelligent lock can also be used as an information interaction node, and all data binding related to the geographic information node and the operation of the door or the equipment is expanded through an intelligent lock management platform, such as binding of a lock ID, a safety chip ID and an electrical equipment ID, so that the whole process of building, operating and maintaining the power grid by using the information content of the door lock node is achieved, the intelligent lock is integrated with a production management information system, visual sharing of equipment ledger information, defect information, routing inspection information and the like is achieved, standardized operation of routing inspection is achieved, and unification of defect management processes is achieved.
Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a lock body of an NFC-based energy-obtaining secure intelligent lock provided in an embodiment of the present invention;
fig. 2 is a block diagram of a control system of a secure smart lock based on NFC energy-taking provided by an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a micro control unit of an NFC energy-taking module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an NFC antenna of an NFC energy-taking module according to an embodiment of the present invention;
fig. 5 is a coil structure diagram of an NFC antenna provided in an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a security module according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a voltage regulator module according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a motor driving module according to an embodiment of the present invention.
Description of the reference numerals
10-lock body, 11-shell, 12-lock rod, 13-first groove, 14-second groove, 15-transverse shaft,
16-a first pressure spring, 17-a second pressure spring, 18-a motor, 19-a positioning pin shaft, 20-a control circuit board,
21-a first hall element, 22-a second hall element, 23-a first support, 24-a second support.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.
In the embodiments of the present invention, unless otherwise stated, the use of directional terms such as "upper, lower, left, and right" generally refers to the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when in use. The terms "first" and "second" are used merely to distinguish one element from another and are not intended to indicate or imply relative importance. In the description of the present invention, the "connection" may be a mechanical connection between two components, or an electrical power connection or a signal connection between two components, such as a control signal and a feedback signal; the "connection" may be a direct connection between two components/elements, an indirect connection through an intermediate medium (e.g., a wire), or an indirect connection through a third component/element.
Near Field Communication (NFC) is a short-range high-frequency radio technology. The NFC operation mode is divided into a passive mode and an active mode. In the passive mode, an NFC initiator (also called a master device) needs a power supply device, the master device utilizes the energy of the power supply device to provide a radio frequency field and sends data to an NFC target device (also called a slave device), and the transmission speed is 106Kbit/s, 212Kbit/s or 424 Kbit/s. The slave device does not generate a radio frequency field, so that the radio frequency field generated by the master device is converted into electric energy without a power supply device, the electric energy is supplied to a circuit of the slave device, and the data sent by the master device is received. In the passive mode, the NFC master device may detect the contactless card or the NFC target device and establish a connection therewith. In the active mode, both the initiator and the target must actively generate the rf field when transmitting data to each other, and both require the power supply device to provide the energy for generating the rf field.
The embodiment of the utility model provides a safe intelligence lock based on NFC gets energy, including lock body 10 and control system. Fig. 1 is a schematic structural diagram of a lock body of a safety intelligent lock based on NFC energy acquisition provided by an embodiment of the present invention. As shown in fig. 1, the lock body 10 includes a housing 11 and a lock opening and closing actuator. The switch lock actuating mechanism comprises: the locking rod 12, the transverse shaft 15, the positioning pin shaft 19, the reset compression spring and the motor 18; the reset compression spring comprises a first compression spring 16 and a second compression spring 17; the lock rod 12 is provided with a first groove 13, and one end of the lock rod 12 is connected with the second pressure spring 17; one end of the transverse shaft 15 is embedded into the first groove 13, and the other end of the transverse shaft 15 is connected with the first pressure spring 16; the motor 18 is used for providing power for the transverse shaft 15 to move towards the first pressure spring 16 so as to move the transverse shaft 15 out of the first groove 13, and therefore the lock rod 12 is bounced under the action of the reset force of the second pressure spring 17. The lock rod 12 is provided with a second groove 14, and the positioning pin 19 is matched with the second groove 14 on the lock rod 12 and used for limiting the downward displacement of the lock rod 12.
Fig. 2 is a block diagram of a control system of the safety intelligent lock based on NFC energy-taking provided by the embodiment of the present invention. As shown in fig. 2, the control system includes an NFC power-taking module and a security module; the NFC energy-taking module comprises a micro control unit and an NFC antenna connected with the micro control unit; the safety module is connected with the micro control unit and is used for carrying out identity authentication on unlocking equipment; the NFC energy-taking module is in near field communication with the unlocking equipment through the NFC antenna and obtains electric energy from the unlocking equipment so as to start the switch lock executing mechanism. The NFC energy-taking module converts radio-frequency signals into electric energy to supply power for the motor by acquiring the radio-frequency signals in the surrounding environment and performing energy conversion. The NFC energy taking module adopts an inductive coupling mode to take energy, namely electromagnetic energy between the NFC energy taking module and the radio frequency signal transmitting equipment is coupled through a space high-frequency alternating magnetic field, and the coupled energy is converted into electric energy so as to meet self power supply and support high-power external output. Fig. 3 is a schematic circuit diagram of a micro control unit of an NFC energy-taking module according to an embodiment of the present invention. In this embodiment, the micro control unit employs a TN2115S chip, and the chip has NFC wireless energy collection capability. Fig. 6 is a schematic circuit diagram of a security module according to an embodiment of the present invention. In this embodiment, the security module adopts an SC 1041 security chip, and an encryption algorithm is built in the security chip, so that security control functions such as data encryption/decryption, bidirectional identity authentication, access right control, data encryption transmission, and the like can be realized. The identity authentication process of the security chip includes, for example: firstly, establishing the safe connection between unlocking equipment (an electronic key) and the intelligent lock, decrypting the encrypted message when the intelligent lock receives the authorization information to obtain the key ID, the certificate serial number, the lock authorization code and the unlocking times, verifying the legality of the information, executing the unlocking operation after the verification is passed, and updating the unlocking times.
The control system further comprises a state detection module, wherein the state detection module is in signal connection with the micro control unit and is used for detecting whether the cross shaft 15 is moved out of the first groove 13 or not and whether the lock rod 12 is bounced or not. The state detection module includes a first hall element 21 and a second hall element 22. The first hall element 21 is close to the transverse shaft 15 and is used for detecting the change of the magnetic field between the first hall element 21 and the transverse shaft 15; the second hall element 22 is close to one end of the lock rod 12, which is connected with the second pressure spring 17, and is used for detecting the change of the magnetic field between the second hall element 22 and the lock rod 12. The micro control unit determines the position of the cross shaft 15 according to the magnetic field change detected by the first hall element 21 to judge whether the cross shaft 15 moves out of the first groove 13, and determines the position of the lock rod 12 according to the magnetic field change detected by the second hall element 22 to judge whether the lock rod 12 bounces, thereby determining whether the unlocking operation is completed.
The control system further comprises a voltage stabilizing module and a motor driving module, wherein the input end of the voltage stabilizing module is connected with the micro control unit, the output end of the voltage stabilizing module is connected with the motor driving module and the safety module, and the motor driving module is connected with the motor 18. Fig. 7 is a schematic circuit diagram of a voltage regulator module according to an embodiment of the present invention; fig. 8 is a schematic circuit diagram of a motor driving module according to an embodiment of the present invention. As shown in fig. 7, the voltage regulator module employs AN _ SY8290 power management chip and a voltage regulator circuit to provide a stable voltage/current output. As shown in fig. 8, the motor driving module employs a HT7K1201 motor driver to control the activation of the motor 18.
Fig. 4 is a schematic circuit diagram of an NFC antenna of an NFC energy-taking module according to an embodiment of the present invention; fig. 5 is a coil structure diagram of an NFC antenna provided in an embodiment of the present invention. As shown in fig. 4 and 5, the NFC antenna includes an NFC data receiving coil RFA, an NFC data transmitting coil RFB, and an NFC power-taking coil RFC. In the embodiment, a circle of RFA coil is used as a data receiving antenna, a circle of RFB coil is used as a data sending antenna, and the RFA coil and the RFB coil are matched for NFC data communication; adopt three rings of RFC coils as getting can the antenna for NFC passive power supply. The NFC data receiving coil RFA +/RFA-, the NFC data sending coil RFB +/RFB-and the NFC power taking coil RFC +/RFC-are respectively connected with the radio frequency interfaces (RF _ AP, RF _ AM, RF _ BP, RF _ BM, RF _ CP and RF _ CM) of the micro-control unit.
In this embodiment, the control system is integrated on a circuit board (PCB) that is mounted within the housing of the lock body. Specifically, the NFC antenna is integrated on a PCB to form a PCB antenna; the micro control unit, the safety module, the voltage stabilizing module and the motor driving module are integrated on the circuit board to form a control circuit board 20 of the intelligent lock; the PCB antenna is soldered on the control circuit board 20. One end of the control circuit board 20 is close to the transverse shaft 15, and the other end of the control circuit board 20 is close to one end of the lock rod 12, which is connected with the second pressure spring 17. The first hall element 21 is welded to one end of the control circuit board 20 close to the cross shaft 15, and the second hall element 22 is welded to one end of the control circuit board 20 close to the lock rod 12. The control system further comprises an energy storage capacitor for temporarily storing the electric energy acquired by the NFC energy acquisition module. A bracket assembly is disposed in the housing 11, and is used for fixing the control circuit board 20, the motor 18 and the capacitor. The bracket component comprises a first bracket 23 and a second bracket 24, the second bracket 24 is I-shaped, one end of the second bracket 24 is abutted against the inner wall of the shell 11, and the other end of the second bracket 24 is tightly clamped with the motor 18 to enable the motor 18 to be tightly matched with the tail end of the motor 18, so that the motor 18 is fixed.
During near field communication, the intelligent lock works in a passive mode and is used as a slave device, and a radio frequency field generated by a main device (a mobile phone or an external device with an NFC function) is converted into electric energy. When an unlocking device (an NFC mobile phone or an external device) is close to the intelligent lock, the NFC antenna of the intelligent lock automatically acquires energy, when the acquired energy reaches the voltage required by starting the control system, the control system performs identity authentication through the safety module and judges whether the acquired electric energy reaches a preset threshold value (the electric energy is enough to start the motor), and the motor is started to unlock after the identity authentication is successful and the electric energy reaches the preset threshold value. The unlocking process of the intelligent lock of the embodiment is as follows: the PCB antenna receives an unlocking signal sent by the NFC mobile phone and obtains electric energy at the same time, after the identity authentication is successfully carried out through the security module, the micro control unit sends an unlocking instruction to the motor driving module, and the motor 18 is started. The gear end of the motor 18 rotates forward to drive the transverse shaft 15 above the gear of the motor 18 to move horizontally leftwards, at the moment, the first pressure spring 16 is in a compressed state, and in the process that the transverse shaft 15 moves leftwards, the tongue-shaped structure at the right end of the transverse shaft 15 withdraws from the first groove 13 on the lock rod 12; at this time, the lock rod 12 bounces under the action of the reset force of the second pressure spring 17, and the lock rod 12 moves upwards integrally to realize unlocking. During the translation of the horizontal axis 15 to the left, the first hall element 21 senses a change in the surrounding magnetic field strength. The micro control unit determines whether the cross shaft 15 moves out of the first groove 13 according to the magnetic field change detected by the first hall element 21, and determines whether the lock rod 12 bounces according to the magnetic field change detected by the second hall element 22, so that whether unlocking is finished is judged, and a signal of finishing unlocking is returned to the NFC mobile phone. The locking process is as follows: under the action of external force (manpower), one end of the lock rod 12 rotates clockwise to align with the lock hole, downward pressure is applied, the whole lock rod 12 moves downwards to a certain distance, the transverse shaft 15 moves rightwards under the action of the reset force of the first pressure spring 16 and is embedded into the first groove 13 in the lock rod 12, and the lock rod 12 stops moving under the limiting action of the positioning pin shaft 19 to complete locking.
The intelligent lock provided by the embodiment of the utility model realizes the safety certification of unlocking through the safety module based on NFC energy taking and communication, thereby avoiding unauthorized unlocking operation; get through NFC and provide the electric energy of unblanking, need not to install the battery, prolong the life of intelligent lock, avoid the maintenance work that the battery is ageing to be brought.
The utility model discloses built-in security chip of intelligence lock is as authority authentication, and security authentication's assurance channel cooperates corresponding key management system, authority management system, through corresponding management system, interface, realizes long-range issue, the personnel management of the authority of equipment such as measurement box, switch board, provides effective technical guarantee for electrical equipment's safe operation, the precaution of stealing the electric accident. For example, the master station system performs one-to-one association between the electronic key of the intelligent lock and the unlocking relationship of the intelligent lock, provides unlocking authorization data according to the association relationship, and performs identity authentication between the devices by using a symmetric key based on the SM1 algorithm, thereby ensuring the validity of the electronic key. The intelligent lock can also be used as an information interaction node, and all data binding related to the geographic information node and the operation of the door or the equipment is expanded through an intelligent lock management platform, such as binding of a lock ID, a safety chip ID and an electrical equipment ID, so that the whole process of building, operating and maintaining the power grid by using the information content of the door lock node is achieved, the intelligent lock is integrated with a production management information system, visual sharing of equipment ledger information, defect information, routing inspection information and the like is achieved, standardized operation of routing inspection is achieved, and unification of defect management processes is achieved.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
Claims (10)
1. A safe intelligence lock based on NFC can get, its characterized in that includes:
the lock body comprises a shell and a switch lock actuating mechanism;
the control system comprises an NFC energy-taking module and a safety module;
the NFC energy-taking module comprises a micro control unit and an NFC antenna connected with the micro control unit;
the safety module is connected with the micro control unit and is used for carrying out identity authentication on unlocking equipment;
the NFC energy-taking module is in near field communication with the unlocking equipment through the NFC antenna and obtains electric energy from the unlocking equipment so as to start the switch lock executing mechanism.
2. The NFC-based secure smart lock enabled according to claim 1, wherein the switch lock actuator comprises: the locking rod, the cross shaft, the reset pressure spring and the motor are arranged on the frame;
the reset compression spring comprises a first compression spring and a second compression spring;
the lock rod is provided with a first groove, and one end of the lock rod is connected with the second pressure spring;
one end of the transverse shaft is embedded into the first groove, and the other end of the transverse shaft is connected with the first pressure spring;
the motor is used for providing power for the transverse shaft to move towards the first pressure spring so as to enable the transverse shaft to move out of the first groove, and therefore the lock rod is enabled to bounce under the action of the reset force of the second pressure spring.
3. The NFC-based energy-obtaining safe intelligent lock according to claim 2, wherein the switch lock actuator further comprises a positioning pin, and the lock rod is provided with a second groove;
and the positioning pin shaft is matched with the second groove and used for limiting the downward displacement of the lock rod.
4. The NFC-based secure smart lock of claim 2, wherein the control system further comprises a status detection module;
the state detection module is in signal connection with the micro control unit and is used for detecting whether the cross shaft is moved out of the first groove or not and whether the lock rod is bounced or not.
5. The NFC-based power-taking secure smart lock of claim 4, wherein the state detection module comprises a first Hall element and a second Hall element;
the first Hall element is close to the transverse shaft and used for detecting the change of the magnetic field between the first Hall element and the transverse shaft;
the second Hall element is close to one end, connected with the second pressure spring, of the lock rod and used for detecting the change of the magnetic field between the second Hall element and the lock rod;
the micro control unit determines the position of the cross shaft according to the magnetic field change detected by the first Hall element so as to judge whether the cross shaft moves out of the first groove or not, and determines the position of the lock rod according to the magnetic field change detected by the second Hall element so as to judge whether the lock rod bounces or not.
6. The NFC-based energy-taking secure smart lock according to claim 2, wherein the control system further comprises a voltage stabilizing module and a motor driving module;
the input end of the voltage stabilizing module is connected with the micro control unit, and the output end of the voltage stabilizing module is connected with the motor driving module and the safety module;
the motor driving module is connected with the motor.
7. The NFC-based secure smart lock of claim 1, wherein the NFC antenna comprises an NFC data receiving coil, an NFC data transmitting coil, and an NFC power-taking coil.
8. The NFC-based energy-taking secure smart lock according to claim 7, wherein the NFC data receiving coil, the NFC data transmitting coil and the NFC energy-taking coil are respectively connected with a radio frequency interface of the micro control unit.
9. The NFC-based power-taking secure smart lock of claim 5, wherein the control system is integrated on a control circuit board, the control circuit board being mounted within the housing.
10. The NFC-based energy-taking secure intelligent lock according to claim 9, wherein one end of the control circuit board is close to the transverse shaft, and the other end of the control circuit board is close to one end of the lock rod, which is connected with the second pressure spring;
the first Hall element is welded at one end, close to the transverse shaft, of the control circuit board, and the second Hall element is welded at one end, close to the lock rod, of the control circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021305820.9U CN212391825U (en) | 2020-07-06 | 2020-07-06 | Safe intelligent lock based on NFC energy taking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021305820.9U CN212391825U (en) | 2020-07-06 | 2020-07-06 | Safe intelligent lock based on NFC energy taking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212391825U true CN212391825U (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021305820.9U Active CN212391825U (en) | 2020-07-06 | 2020-07-06 | Safe intelligent lock based on NFC energy taking |
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| CN (1) | CN212391825U (en) |
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- 2020-07-06 CN CN202021305820.9U patent/CN212391825U/en active Active
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