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In the industrial sector, cam locks play a vital role as a key connection and locking device. Its unique design and superior performance make the cam lock excellent in a wide range of industrial applications. The following is a detailed introduction to the characteristics of industrial cam locks by Kerong cam lock experts. Industrial cam locks have extremely high stability and reliability. Its sturdy structure and precise manufacturing process ensure that the cam lock can maintain stable performance in long-term, high-intensity use environments. Whether in machine tool spindles, machine tool gearboxes or reducers and other mechanical equipment, cam locks can provide reliable connection and locking, greatly improving the productivity and service life of machinery and equipment. The ease of operation of the cam lock is also one of its distinguishing features. With a simple rotation action, the cam lock can be quickly locked and unlocked, which greatly improves the work efficiency. In addition, some cam locks also have the characteristics of blowing out the stick and gravity retracting the stick, making the operation more flexible and convenient. This convenient operation mode not only reduces the labor intensity of workers, but also improves the safety of work. Industrial cam locks also have good sealing properties. In cam locking joints, each female joint is equipped with a cam locking arm that matches the circumferential groove on the nipple. When the cam locking arm or handle is closed, the nipple is pushed into the female fitting and tightly bonded with the gasket at the female joint, resulting in a good seal. This sealing performance not only helps to prevent the leakage of liquids or gases, but also effectively prevents the ingress of dust and impurities, ensuring the normal operation of the equipment. industrial cam locks In addition, industrial cam locks have a wide range of applications. Due to its large fastening torque, high transmission reliability and light weight, cam locks are widely used in aerospace, machinery manufacturing and other fields. In the aerospace field, cam locking discs are used in key parts such as engine runner and bearing connections, aircraft structural parts connections, etc., to ensure the toughness and safety of the entire connection system. To sum up, industrial cam locks play an irreplaceable role in the industrial field with their high stability, convenient operation, good sealing and wide application. With the progress of science and technology and the development of industry, the performance and application range of cam locks will continue to expand and improve, providing more reliable and efficient guarantee for industrial production and equipment safety. As the source factory supplier of industrial cam locks, we welcome users from all over the world to choose Kerong brand cam locks, we welcome OEM/ODM orders, users can leave us a message if necessary, thank you.

As an important type of lock, cam locks are widely used in office furniture, industrial cabinets, electrical cabinets, auto parts and various occasions that require safe locking. With the continuous development of the market and the growing demand, China Shenzhen Kerong Electronic Technology Co., Ltd. has gradually emerged as the source supplier of cam locks, providing high-quality and diversified cam lock products for customers at home and abroad. Shenzhen Kerong Electronic Technology Co., Ltd. is a leader in the field of cam locks in China. As an enterprise integrating R&D, design, production, assembly and sales, Kerong focuses on the production of office furniture locks, industrial cabinet locks, cam locks, electrical cabinet locks, password locks and various accessories. Its products have the characteristics of durability, beautiful appearance, complete varieties and diverse styles, and are well received by the market. The company not only has an independent production plant, but also has a R&D team of dozens of people, and has won the trust of customers all over the world with its excellent product quality and professional service attitude. As the source supplier of cam locks , we support personalized customization for different industries and support OEM/ODM orders. Welcome customers in need to contact us, welcome to leave us a message, thank you.

Define Your Needs 1. Security Level Requirements: Evaluate the importance and sensitivity of the items or equipment stored in the switchboard to determine the level of security protection required. For example, the power distribution cabinet storing important data center servers may require high security locking systems, such as electronic locking systems with multiple authentication, encryption technology and real-time monitoring functions to prevent unauthorized access and data leakage; while for ordinary power distribution cabinets, general mechanical locks may be able to meet the basic security requirements. 2. Frequency of use and ease of operation: Consider the frequency of use of the power distribution cabinet and the operator's need for ease of operation. If the distribution cabinet needs to be opened and closed frequently, such as in the production workshop and other places, then a locking system with simple and fast operation should be selected, such as an electronic lock using electronic key or password input, which can improve the working efficiency; and for the distribution cabinets with lower frequency of use, such as the standby distribution cabinets, the reliability and simplicity of mechanical locks may be more appropriate. 3. Management function requirements: to clarify whether there is a need to manage the locking records of the distribution cabinet, personnel rights, etc.. Some large enterprises or data centers may need to record in detail each unlocking operation of the switchgear cabinet in order to carry out security audits and responsibility tracing, then there is a need for locking management system with unlocking record function and authority management function, through the software platform it is convenient to set the unlocking authority of different personnel, view the operation record and so on. Consider The Type of Distribution Cabinet and The Environment 1. Types of distribution cabinets: Different types of distribution cabinets, such as low-voltage distribution cabinets, high-voltage distribution cabinets, power distribution cabinets, lighting distribution cabinets, etc., may have different requirements for locking systems. For example, high-voltage distribution cabinets involve high-voltage equipment, the security and reliability of the locking system is extremely high, may require the use of professional high-voltage locks, and has a design to prevent misoperation and arc generation; and lighting distribution cabinets locking system is relatively simple, but may need to consider the compatibility with the lighting control system . 2. Use of the environment: pay attention to the environmental conditions in which the distribution cabinet is located, such as indoor, outdoor, humid, corrosive and so on. In harsh environments, such as outdoor distribution cabinets, it is necessary to select a locking system with good waterproof, dustproof, and corrosion-resistant properties to ensure its long-term stable operation. Some of emka's products, such as seals and housing materials, have been specially treated to withstand various harsh environments. Compatibility and Scalability 1. Compatibility with existing systems: If the enterprise already has other security management systems or equipment monitoring systems, the newly selected locking management system for distribution cabinets should be able to seamlessly integrate with the existing systems to realize information sharing and collaborative work. For example, it can be linked with the enterprise's access control system, monitoring system, etc. When someone opens the distribution cabinet, the system can automatically trigger the monitoring video and record relevant information. 2. Expandability: Considering the future development of the enterprise and the increase in the number of distribution cabinets, the locking management system should have a certain degree of expandability, and be able to easily add new locks, keys and user rights to adapt to the changing needs. Some modular design locking management systems have advantages in expandability, and can be flexibly configured and expanded according to actual needs. Reliability and Stability 1. Product quality and brand reputation: Choose a well-known brand and reliable quality locking management system, whose products usually undergo strict quality testing and market verification, with high reliability and stability. You can refer to other users' usage evaluation, industry reputation and relevant certifications and standards, such as UL certification, CE certification, etc., to assess the quality of the products . 2. Technical support and after-sales service: ensure that the supplier can provide timely and effective technical support and after-sales service. In the process of use, if there is a lock failure or system problem, you can get professional maintenance and technical support in time to minimize the impact on production and operation. It is also important to understand the supplier's after-sales service network, response time and whether to provide training and other service elements. Cost Factors 1. Procurement costs: comprehensive consideration of the purchase price of the locking management system, including the cost of locks, keys, control equipment, software platforms and so on. The price of products of different brands and functions varies greatly and needs to be selected according to the budget of the enterprise. However, do not just take the price as the only measurement standard, but also consider the performance and quality of the product. 2. Installation and maintenance costs: In addition to procurement costs, you also need to consider the installation and maintenance costs. Some complex electronic locking system may require professionals to install and debugging, increasing the cost of installation; and electronic locking device battery replacement, system software upgrades and other maintenance work will also incur certain costs. When choosing, you should fully understand the installation and maintenance requirements of the product and evaluate the cost of the later investment.

Choose high security locks A.Mechanical locks 1. Strong anti-picking performance of the lock cylinder: B or C grade lock cylinder, its internal structure is complex, compared with A grade lock cylinder is more difficult to be picked. For example, the C-level lock cylinder with double-row, multi-row blade and V-shaped side column structure, can effectively prevent violence to open. 2. High-quality lock material: stainless steel or high-strength alloys and other materials used in the production of locks, locks to enhance the degree of solidity, to prevent the destruction of external forces. For example, stainless steel lock body has good corrosion resistance and impact resistance. B. Electronic locks 1. Electronic locks with advanced encryption technology: using electronic locks with Advanced Encryption Standard (AES) encryption technology, such as AES - 256-bit encryption, which can effectively prevent passwords or signals from being cracked. 2. With multiple authentication methods: Support a combination of fingerprint recognition, face recognition and password. For example, users are simultaneously required to enter a password and perform fingerprint identification, increasing the difficulty of illegal opening. Strengthening identification management 1. User identification: For mailbox users, establish a strict identity registration system to record name, contact information, address and other information. When allocating mailboxes, provide users with unique identification, such as key number, electronic card number or account password. 2. Permission management system: Adopt permission management software to assign different access rights to mailboxes according to users' identities and needs. For example, for ordinary residents' mailboxes, only the person himself or authorized family members are allowed to access; for property management or community service mailboxes, specific staff permissions are set. Installation of monitoring and alarm system 1. Monitoring equipment: install cameras in the mailbox area to ensure that the environment around the mailbox is under 24-hour monitoring. The camera should have high-definition picture quality, night vision function, and be able to clearly record the opening process of the mailbox and the activities of the surrounding people. 2. Alarm device: equipped with intrusion alarm system, when the mailbox is opened illegally or damaged by external forces, it can immediately sound the alarm and send alarm information to the management personnel or users. The alarm system can be linked with the monitoring system, which is convenient for quickly checking the scene situation. Regular maintenance and inspection 1. Lock maintenance: regular maintenance of mailbox locks, check the wear and tear of the lock cylinder, the mechanical parts of the lock body is working properly. For electronic locks, check the battery power, signal transmission and other conditions, timely replacement of batteries and maintenance of faulty components. 2. System check: If you use a mailbox management system, such as an electronic access control system or an intelligent mailbox system, check the software and hardware of the system regularly. Update the software version, repair the security holes, check the operation status of the server to ensure the stability and security of the system. Optimize mailbox layout and design 1. Concealed design: Design mailboxes as embedded or hidden inside walls to reduce the exposed portion of mailboxes and reduce the risk of vandalism. For example, set up hidden mailbox niches at the entrances of buildings, so that mailboxes are not easy to be found and attacked. 2. Anti-fishing design: anti-fishing design is adopted at the opening of the mailbox, such as setting up one-way opening and curved delivery opening, etc., to prevent the lawbreakers from using tools to steal the letters or articles in the mailbox through the delivery opening. Establishment of security management system and training 1. Management system: establish a perfect safety management system for mailboxes, clearly stipulate the rules for using mailboxes, maintenance responsibilities, safety inspection process and other contents. Formulate corresponding penalties for violating the rules, such as legal prosecution for destroying mailboxes or illegally obtaining other people's letters. 2. Training and publicity: Provide security training to mailbox managers and users, informing them of how to use mailboxes correctly, identify security risks, protect personal information and other knowledge. Through publicity to improve the security awareness of users, and jointly maintain the security of mailboxes.

Risk of stealing goods by damaging the fuselage Risk Description: 1. In addition to picking locks, thieves may use tools to vandalise the body of the vending machine, such as smashing through glass panels or drilling holes in the casing to access merchandise. This approach can cause serious damage to the vending machine and result in significant loss of merchandise. Countermeasures: 1. Use reinforced glass as the display panel of the vending machine. Tempered glass has high strength and impact resistance and can withstand some degree of external damage. For example, the use of tempered glass with a thickness of 8 - 10 mm can effectively prevent it from being easily broken. 2. Install anti-drilling steel plates inside the body shell. These steel plates can be installed close to the merchandise storage area. When a tool tries to drill a hole, it will encounter a hard protective layer, making theft more difficult. At the same time, install vibration sensors in the body to trigger an alarm as soon as severe vibrations are detected. Cybersecurity Risks (for Smart Vending Machines) Risk Description: 1. Intelligent vending machines are usually connected to a network for functions such as remote monitoring, inventory management and payment systems. This poses a risk of cyber-attacks, e.g., hackers may break into the vending machine's system to tamper with prices, steal customer payment information, or interfere with inventory data. Countermeasures: 1. Install a professional network firewall. A firewall filters incoming and outgoing network traffic and blocks unauthorised access. Regularly update the rules and software of the firewall to cope with changing network threats. 2. Use secure network communication protocols, such as SSL/TLS encryption protocols, for securing payment data and other sensitive information during network transmission. Also, conduct regular security vulnerability scanning and updating of the software systems of the vending machines to fix any security problems found in a timely manner. Fire Risk Risk description: 1. Vending machines have electrical components inside, such as compressors, circuit boards and lighting equipment. If these components fail, a fire may start. In addition, there is an increased risk of fire if there are flammable items around the vending machine. Countermeasures: 1. Install temperature sensors and smoke detectors inside the vending machine. When the temperature is too high or smoke is detected, the alarm can be triggered in time and can be linked with the fire fighting system. 2. Regularly maintain and inspect the electrical components inside the vending machine to ensure their normal operation. Avoid stacking flammable items around the vending machine, and keep the environment around the vending machine clean and well-ventilated. Risk of poisoning Risk Description: 1. Malicious persons may endanger the health of consumers by dropping hazardous substances at the vending machine merchandise drop-off ports or internal merchandise storage areas. This risk is relatively low, but the consequences are extremely serious. Countermeasures: 1. Install well-sealed merchandise ports to prevent easy entry of outside items. At the same time, the vending machine can be equipped with an internal detection device for detecting whether abnormal substances have entered the merchandise storage area. 2. Strengthen the daily management and monitoring of the vending machines and regularly check whether there are any signs of tampering with the merchandise. For vending machines in high-risk areas, consideration can be given to adding devices such as biosensors for detecting harmful substances.

Safeguard customer belongings 1. Prevent theft: Self-storage rooms store a wide variety of customer property, including valuables, business documents, seasonal items and so on. Effective locking management can prevent external miscreants from lock-picking to enter the storage room to commit theft. For example, the use of high-security locks and advanced access control systems can significantly reduce the incidence of theft to ensure the safety of customer property. 2. Avoid damage to items: through reasonable locking management, you can also avoid damage to items caused by unauthorised personnel to enter at will. For example, to prevent accidentally knocking over or dropping customers' fragile items in the course of handling, or damaging commercial equipment due to improper operation. Protecting customer privacy 1. Confidential information security: many customers will contain business secrets, personal privacy information documents stored in the self-storage room. For example, financial statements of enterprises, research and development information, personal identity information documents and so on. Strict locking management can ensure that these private information is not leaked, to maintain the business interests of customers and personal privacy. 2. Exclusive space maintenance: self-storage room provides customers with independent storage space, a reasonable locking mechanism to ensure that each customer's storage space is not infringed upon by others at will, so that customers can store their own belongings at ease, as if they have a private small warehouse. Ensure proper operation of storage facilities 1. Facility integrity maintenance: If locking management is not in place, storage room doors, locks and other facilities may be damaged due to frequent improper opening or destruction. Good locking management can reduce the frequency of damage to these facilities and extend their service life, thereby reducing operating costs. For example, regular inspection and maintenance of locks can identify and solve minor problems with locks in a timely manner, avoiding the deterioration of the problem leading to the need to replace the entire door or lock system. 2. Orderly operation guarantee: Strict lock management helps to maintain the operational order of the storage room. By restricting access to personnel and standardising the locking process, it can avoid problems such as illegal occupation of storage space and chaotic stacking of items, making the entire storage operation more orderly and efficient. For example, with the intelligent access control system, the lock can only be opened and entered after the customer pays the fee on time and undergoes identity verification, which ensures the legality and orderliness of the operation.

The application scenarios of the intelligent switchboard lock management system are wide-ranging and mainly include the following aspects: Power production and supply Power plant: It is used for locking management of various distribution cabinets in the power plant, such as generator outlet cabinet and plant distribution cabinet. Through the intelligent locking management system, it can realize remote monitoring and operation of distribution cabinets, grasp the operation status of distribution cabinets in real time, ensure the stable operation of power generation equipment, and improve power generation efficiency and safety. Substation: In the substation, the intelligent distribution cabinet locking management system helps to carry out refined management of high-voltage distribution cabinets, low-voltage distribution cabinets and other equipment. Operation and maintenance personnel can detect potential faults in a timely manner based on the information fed back from the system, and quickly respond to and deal with the problems to ensure reliable power supply in the substation and reduce the duration of power outage. Industrial Manufacturing Factories: Production equipment in factories is usually powered by multiple switchboards, which can be centrally managed by an intelligent locking management system. For example, in the automobile manufacturing workshop, the system can realize the real-time monitoring and remote control of the switchboards of stamping, welding, painting, assembly and other production processes, to ensure the stable operation of the production line, and improve production efficiency and product quality. Mining enterprises: In the process of mining and processing, a large number of electrical equipment need reliable power supply. Intelligent distribution cabinet locking management system can adapt to the harsh working environment, effectively manage the distribution cabinets in mines, ensure the normal operation of ventilation, drainage, hoisting and other key equipments, and improve the safety and continuity of mine production. Commercial and Service Industry Shopping malls and supermarkets: Shopping malls and supermarkets have numerous lighting, air conditioning, elevators, cold chain equipment, etc., and the safe and stable operation of their power distribution cabinets is crucial. Intelligent locking management system can monitor the parameters of power distribution cabinets in real time and warn potential failures in advance to ensure the normal operation of shopping malls and supermarkets and provide customers with a comfortable shopping environment. Data center: Data centers require high reliability and stability of power supply. Intelligent distribution cabinet locking management system can realize fine management of data center distribution cabinets, real-time monitoring of power quality, load conditions, etc., to ensure the stable operation of servers and other key equipment, and to prevent data loss or business interruption caused by power problems. Public Facilities and Organizations Hospitals: Hospital medical equipment such as operating rooms, intensive care units, large-scale examination equipment, etc. require reliable power protection. Intelligent switchboard locking management system can monitor the operation status of switchboards in real time, ensure the continuity and stability of power supply, and provide strong support for the safety of patients' lives. Schools: Intelligent locking management system can also be applied to the distribution cabinets in the school's teaching buildings, laboratories, libraries and other places. Through this system, centralized management and remote monitoring of power equipment on campus can be realized, which improves the safety and management efficiency of power consumption on campus and guarantees the normal development of teaching activities. Property Management and Construction Office buildings: Office buildings have a large number of office equipment and air-conditioning systems, and the management of their power distribution cabinets is crucial to the normal operation of tenants. Intelligent switchboard locking management system can help property managers to grasp the operation of switchboards in real time, deal with faults in a timely manner, and improve the service quality and efficiency of property management. Residential area: applying intelligent switchboard locking management system in the distribution room of residential area can realize the centralized management and monitoring of residents' electricity consumption in the area. Once power failure occurs, the system can quickly locate and notify maintenance personnel, shorten the power outage time and improve the quality of life of residents.

A.NFC Communication Security 1. Encryption protocol: Check the NFC communication encryption protocol adopted by the smart lock. Strong encryption algorithms such as Advanced Encryption Standard (AES) can guarantee the security of data in the transmission process and prevent the unlocking signal from being intercepted and cracked. For example, 128-bit or 256-bit AES encryption can effectively resist common hacker attacks. 2. Signal anti-interference: assess the anti-interference ability of smart locks in complex electromagnetic environments. A good battery-free NFC smart lock should be able to distinguish between legitimate NFC signals and external interference signals to avoid false triggering of the lock. It can be tested in an environment with other NFC devices or wireless signal sources to see if the lock will open abnormally. 3. Two-way authentication mechanism: Find out whether the smart lock adopts two-way authentication. This means that not only will the lock verify the legitimacy of the NFC device (e.g. mobile phone or card), but the NFC device will also verify the identity of the lock. This mechanism adds a layer of security to prevent illegal devices from simulating legitimate locks for signal theft. B. Physical security protection 1. Lock cylinder quality: Although battery-free NFC smart locks mainly rely on electronic technology to unlock the door, the lock cylinder is still an important line of physical defence. Check the material and structure of the lock cylinder, such as the use of grade B or C lock cylinder, these lock cylinders have a higher anti-picking performance. B grade lock cylinder usually has a double row of bullet or leaf structure, C grade lock cylinder is more complex, can effectively prevent violent opening. 2. shell solidity: check the material and manufacturing process of the lock shell. Sturdy metal shell (such as stainless steel or aluminium alloy) can resist the impact of external forces and damage. At the same time, the connecting parts of the shell should be tight and seamless to prevent attackers from accessing the internal circuitry by prying or disassembling the shell. 3. Tamper-evident alarm function: Smart locks with tamper-evident alarm function can send out an alarm when illegal tampering attempts are detected. The alarm can be a local audible or visual alarm, or a remote alarm message sent to the user's mobile phone or security monitoring centre to notify the user of possible security threats in a timely manner. C. Authentication and rights management 1. Multi-factor authentication: Evaluate whether the smart lock supports multi-factor authentication methods, such as NFC + password, NFC + fingerprint and other combinations. Multi-factor authentication can greatly improve the security of locking, even if the NFC device is lost or the information is leaked, no other authentication factors can open the lock. 2. Permission grading and management: For smart locks applied in home, office or commercial places, a perfect permission grading management system is crucial. Check whether it is easy to set different permissions for different users, such as administrator rights, ordinary user rights, temporary user rights. The permission management system should be able to accurately control the time, number and range of times each user can open the lock. 3. User identification accuracy: test the accuracy of the smart lock for user identification. For NFC cards, check whether it can effectively identify legal cards and reject illegal cards; for smart locks that support fingerprint recognition or facial recognition (if any), test the recognition rate and misidentification rate to ensure that only authorised users can unlock the lock smoothly. D. Data security and privacy protection 1. Local data storage security: Understand how to protect user data stored inside the smart lock (such as unlocking records, user permission information, etc.). The data should be stored in encrypted form to prevent user data leakage when the lock is physically destroyed or illegally accessed. At the same time, the storage medium should have a certain degree of resistance to damage, such as the use of flash memory chips and other reliable storage devices. 2. Cloud service security (if applicable): If the smart lock is connected to a cloud service for remote management or data backup, assess the security measures of the cloud service provider. This includes the physical security of the data centre, network security protection (e.g. firewalls, intrusion detection systems, etc.), and encrypted data transmission and storage. Ensure that the cloud service complies with relevant data privacy regulations, such as the EU's General Data Protection Regulation (GDPR) or other national privacy protection laws. Data access control: check the data access control mechanism of the smart lock and its related services. Only authorised users (e.g. administrators or specific technical support staff) should be able to access and modify user data, and the access process should be logged in detail for auditing and traceability.

A. Security : 1. Keys are easy to be copied : the key of traditional mechanical locks is its only unlocking credentials, and if the key is lost or copied after it is obtained by lawless elements, it will pose a security risk. Passive locks use advanced password technology, encryption algorithms, and such as fingerprints, passwords, mobile phones, NFC and other ways to open the lock, and the password can be changed at any time, so security is higher. 2. Can not be real-time monitoring : traditional mechanical locks can not be unlocked real-time monitoring and recording of behaviour, only through physical means to determine whether someone breaks in, and can not detect abnormalities in a timely manner. Passive locks can achieve real-time monitoring through the relevant technology, view the unlocking records in the mobile phone APP, so that users can grasp the lock status at any time. 3. Relatively weak anti-picking ability : the traditional mechanical lock cylinder and lock body structure is relatively simple, in the face of violence and other acts of lock picking, limited resistance. Passive lock shell is usually made of high-strength alloy materials, with a strong resistance to pressure, the internal structure of the design is also more complex, increasing the difficulty of lock picking. B. Convenience : 1. A single way to open the lock : traditional mechanical locks can only be unlocked by the key, the user needs to carry the key with him, once he forgets to bring the key or the key is lost, it will bring great inconvenience. Passive locks support a variety of unlocking methods, such as fingerprint identification, password unlocking, swipe card, etc., the user does not need to carry a key, locking is more convenient. 2. Cumbersome key management : If more than one person needs to use the same lock, traditional mechanical locks need to copy multiple keys and distribute and manage them, making it easy to lose or confuse keys. Passive locks can be easily managed by authority, administrators can authenticate each user and set permissions, management is more efficient. C. In terms of maintenance costs : 1. easy to wear and tear failure : the traditional mechanical lock internal mechanical transmission device and lock cylinder and other components, after a long time of use is prone to wear and tear, rust and other problems, the need for regular maintenance and repair, such as adding lubricants, replacement of the lock cylinder, etc., the maintenance cost is high. Passive lock because there is no mechanical transmission device, not easy to damage, maintenance costs are relatively low. 2. Shorter life expectancy : the wear and aging of mechanical components will affect the service life of traditional mechanical locks, generally need to be replaced after a few years of use. The passive lock of the electronic components of the relatively long life, and is not easily affected by the external environment, the service life is longer. D. Functional scalability : 1. Single function : the function of the traditional mechanical lock is limited to open and close the lock, can not be linked with other smart devices, can not meet the user's needs for intelligent life. Passive locks can be connected with smart home systems to achieve remote control, alarm linkage and other functions, providing users with a more intelligent life experience. 2. Can not adapt to new needs : With the continuous development of science and technology, people for the lock function and security requirements are getting higher and higher, the traditional mechanical locks can not be upgraded and expanded, it is difficult to meet the new needs of users. Passive locks can be upgraded through software upgrades and other ways to continuously improve functionality and security, with better adaptability.

The working principle of the battery-free NFC smart lock mainly involves two aspects: energy harvesting and communication interaction: A. Energy Harvesting : 1. NFC Field Energy Harvesting : When an NFC-enabled mobile phone or other NFC-enabled read/write device is close to the battery-free NFC smart lock, it will generate an NFC RF field around it. The NFC chip or related components inside the smart lock can sense this RF field and harvest energy from it. This energy harvesting method makes use of the principle of electromagnetic induction, similar to the primary coil (NFC reading and writing device) in a transformer generates a changing magnetic field, which induces an electric potential in the secondary coil (the NFC receiving part of the smart lock), thus providing the smart lock with the power needed for its work. 2. Energy Storage and Conversion : The collected energy will be stored in the capacitors or other energy storage elements inside the smart lock. These energy storage elements can store the instantly collected energy and convert and condition it to meet the working voltage and current requirements of the internal circuits and chips of the smart lock. For example, unstable AC power is converted to stable DC power for use by the control circuits and actuators of the smart lock. B. Communication interaction : 1. Authentication Information Transmission : After the mobile phone or NFC read/write device establishes an NFC connection with the smart lock, it will transmit data containing user authentication information to the smart lock. This information can be the digital key pre-stored in the mobile phone, encrypted user information and so on. After receiving this information, the smart lock will decrypt and verify it to determine whether the user has the authority to unlock the door2. 2. Transmission and execution of control instructions : If the user's identity is verified, the mobile phone or NFC read/write device will send control instructions to the smart lock to open or close the lock. After receiving these instructions, the control circuit inside the smart lock will drive the actuator (e.g., motor, electromagnetic lock, etc.) to carry out the corresponding operation to achieve the opening or closing of the lock. In short, the battery-free NFC smart lock realises the unlocking operation without external power supply by cleverly using the energy collection and communication function of NFC technology, which is convenient for users and avoids the maintenance and replacement problems brought by batteries.

In the industrial sector, the performance of locks is critical. It is not only related to the safety of equipment and assets, but also affects productivity and operating costs. In recent years, industrial passive locks have gradually come into their own, showing many advantages over traditional active locks. Firstly, let's compare the performance differences between industrial passive locks and active locks. Active locks usually require a power supply, which means there is a risk of problems such as battery depletion and wiring failure. Industrial passive locks, on the other hand, do not require a power supply and rely entirely on the mechanical structure and intelligent chip to achieve the function of opening and closing the lock. This feature makes the passive lock has the advantage of maintenance-free, greatly reducing the use of cost and maintenance workload. In terms of power consumption, active locks require continuous power supply, its power consumption is relatively high. Passive locks in the work of almost no energy consumption, only in the moment of unlocking will produce a small energy consumption. This is undoubtedly a huge advantage for some industrial scenarios with strict power consumption requirements. For example, in some remote areas of industrial facilities, the use of passive locks can be avoided due to power supply problems. High reliability is another outstanding advantage of industrial passive locks. The electronic components of active locks are susceptible to environmental factors such as high temperature, low temperature, humidity, sand and dust. The mechanical structure and intelligent chip of passive locks are relatively stable and can maintain good performance in various harsh environments. In high-temperature environment, the battery of active lock may overheat, leakage and other problems, while the passive lock is not affected; in low-temperature environment, the performance of the electronic components of active lock may decline, while the passive lock can still work normally. In humid and dusty environments, active locks are susceptible to corrosion and damage, while passive locks offer better protection. Next, we explore the stability and adaptability of industrial passive locks in harsh environments. Industrial passive locks work reliably in both hot desert regions and cold polar environments. Its robust mechanical structure can withstand the erosion of wind, sand, rain and dust, and the intelligent chip can maintain stable performance under extreme temperatures. For example, in some chemical enterprises, there are a lot of corrosive gases and liquids in the production environment, active locks are easily damaged, while passive locks can be used for a long time in this harsh environment. In addition, industrial passive locks also have higher security. Since no power supply is required, passive locks are not affected by electromagnetic interference and hacker attacks. At the same time, its unique mechanical structure and encryption technology also makes it much more difficult to crack. In some of the extremely high security requirements of the industrial sector, such as military, energy, etc., the security advantages of passive locks are more obvious. In short, the industrial passive lock shows great potential in the industrial field with its advantages of maintenance-free, low power consumption and high reliability. In harsh environments, its stability and adaptability is a reliable guarantee for industrial production. With the continuous progress of technology, I believe that industrial passive lock will be widely used in more fields.

(A) policy support and enterprise research and development In recent years, the state has vigorously promoted the development of the Internet of Things, big data, new energy, and introduced various industrial policies one after another, creating a favourable environment for the development of the smart lock industry. Under the guidance of the policy, the smart lock industry towards orderly, high-end direction, encouraging enterprise transformation and upgrading, quality and efficiency. Many smart lock R & D and manufacturing enterprises to respond positively to the policy call, in the passive smart lock research and development to invest a lot of human and material resources. According to incomplete statistics, there are a number of enterprises in the passive smart lock R & D has achieved significant results, and gradually formed their own unique passive smart lock products. The efforts of these enterprises not only promote the progress of passive smart lock technology, but also injected new vitality for the development of the industry. (B) Reduce management and maintenance costs Industrial passive locks without built-in batteries, avoiding the traditional electronic locks due to battery problems brought about by the maintenance problems, greatly reducing maintenance costs. At the same time, the opening and closing logs can be automatically uploaded to the platform, so that managers can monitor the use of locks in real time. Intelligent key one-to-many unlocking function, making the management more convenient and efficient, reducing management costs. For example, in the logistics management of some large enterprises, the use of passive smart locks reduces management costs by about 30% and improves management efficiency by more than 40%. With the continuous progress of technology, the advantages of passive smart locks in reducing management and maintenance costs will be more obvious. (C) Wide range of applications At present, industrial passive locks have been widely used in electric power, communications, petroleum, customs, logistics, troops, railways, banks, hazardous chemicals and other industrial fields. In the future, with the continuous maturation of technology and the increase in market demand, the application scope of passive intelligent locks will be further expanded. In the field of intelligent manufacturing, passive smart locks can provide safe and reliable access control management for intelligent factories, and safeguard the security of production equipment and materials. In the construction of smart cities, passive smart locks can be applied to the management of public facilities, such as street lights and bins, to improve the intelligent level of urban management. In addition, with the continuous development of the smart home market, passive smart locks will also gradually enter the family, bringing more convenience and security to people's lives. It can be predicted that industrial passive locks will become an important part of the lock market in the future, providing strong support for the development of various industries.