Remote unlocking and opening and closing state monitoring system and method for intelligent door lock

Abstract

The invention relates to the technical field of door locks, and discloses a remote unlocking and opening and closing state monitoring system of an intelligent door lock, the remote unlocking and opening and closing state monitoring system comprises a front lock assembly, a lock body assembly, a rear lock assembly and a state monitoring assembly, and the invention further discloses a remote unlocking and opening and closing state monitoring method of the intelligent door lock. According to the door lock, through linkage of the magnet and the double sensors (displacement and angle), the states of'door lock closing ', 'door lock unlocking' and'door opening 'are distinguished in real time, the problem of'state misjudgment' of a traditional door lock is solved, a rear lock mainboard is integrated with WiFi and a Bluetooth module and serves as a gateway to directly achieve remote communication, gateway equipment does not need to be additionally configured, and cost and installation complexity are reduced; and family member unlocking information is pushed to the APP in real time, so that parents can conveniently master the home returning dynamic state of children, the delay and door opening pause mechanism can be adjusted, the situation that a spring bolt is stuck when a user carries objects and buys vegetables home is avoided, the rigid defect of an old design is thoroughly overcome, the cost of an external gateway and the installation complexity are saved, various temporary unlocking requirements are met, and convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of door lock technology, and in particular to a remote unlocking and opening / closing status monitoring system for a smart door lock, as well as a remote unlocking and opening / closing status monitoring method for a smart door lock. Background Technology

[0002] Traditional smart door locks often determine the locking status solely based on the position of the latch, failing to link this information to the door's opening and closing status. For example, if the door is not fully closed but the latch is extended, the system may misinterpret it as "locked," leading to a security risk. Conversely, if the door is closed but the latch is not extended, the user cannot be notified remotely of the risk of the door being unlocked. This single-dimensional monitoring method is insufficient to provide users with accurate control over their home security.

[0003] Existing automatic locking functions mostly use a fixed countdown (e.g., 30 seconds) trigger mechanism, lacking room for user-friendly adjustments. As the user feedback in the meeting minutes stated: "When I came home from grocery shopping, the latch had already extended before I could put my things away within 30 seconds, making it impossible to close the door, and I had to manually turn the latch back." This rigid design is prone to causing the latch to jam, increasing the user's operational burden and defeating the original intention of convenience for smart devices. Summary of the Invention

[0004] In view of the problems existing in the remote unlocking and opening / closing status monitoring systems of the aforementioned smart door locks, this invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a remote unlocking and opening / closing status monitoring system for smart door locks. The aim is to develop a smart door lock system that integrates remote unlocking, linkage status monitoring, user-friendly automatic control, and high security, so as to solve the shortcomings of existing technologies in terms of accuracy, convenience, and security, and meet the actual needs of scenarios such as homes and apartments.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A remote unlocking and opening / closing status monitoring system for a smart door lock includes,

[0008] The front locking assembly includes a front housing, a front locking frame fixedly connected to the side wall of the front housing, a front locking main board fixedly connected to the center of the front locking frame, and a front button embedded in the side wall of the front housing, wherein the end of the front button is in elastic contact with the button on the side wall of the front locking main board.

[0009] The lock body assembly includes a front sealing plate fixedly connected to the side wall of the front lock frame, a lock shell fixedly connected to the side wall of the front sealing plate, a connecting ring fixedly connected to the middle of the lock shell, a lock cylinder threadedly connected to the end of the connecting ring, and a lock body snapped into the end of the lock shell. A rotating shaft is inserted into the center of the lock body, one end of the rotating shaft is inserted into the side wall of the lock cylinder, and the end of the lock cylinder is rotatably mounted on the side wall of the front shell.

[0010] The rear lock assembly includes a rear lock frame inserted into the side wall of the lock housing, a rear housing fixedly connected to the end of the rear lock frame, a rear lock main board fixedly connected to the middle of the rear housing, a battery inserted into the inner side of the rear housing, and a knob rotatably connected to the end of the rear housing. The end terminal of the battery is snapped into the middle of the terminal block on the side wall of the rear lock main board. The battery is electrically connected to the rear lock main board through the terminal and the terminal block. The end of the knob is snapped into the other end of the rotating shaft. A drive module is fixedly connected inside the rear housing. The drive module is sleeved on the side wall of the knob end. A motor is adapted to be installed on the side wall of the rear lock main board. The end of the motor output shaft is connected to the drive module for transmission. The rear lock main board and the front lock main board are electrically connected through wires encapsulated inside the lock housing.

[0011] The status monitoring component includes a latch guide block fixedly connected to the end of the lock body, a latch positioning block encapsulated in the side wall of the door frame and used in conjunction with the latch guide block, a magnet encapsulated inside the latch positioning block, and a displacement sensor fixedly connected to the side wall of the latch guide block. The latch at the end of the lock body is inserted into the center of the latch guide block. The center of the latch positioning block has a positioning hole that cooperates with the latch at the end of the lock body. The sensing area of ​​the displacement sensor is located on the side wall of the latch at the end of the lock body.

[0012] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system for the smart door lock described in this invention, the front lock assembly further includes an adapter plate fixedly connected to the side wall of the front lock frame, a fingerprint module fixedly connected to the top of the adapter plate, and a display module snapped onto the side wall of the adapter plate. The top side wall of the front housing has an clearance hole for use with the fingerprint module. The end of the fingerprint module is inserted into the inner side of the clearance hole on the top of the front housing. The bottom of the display module is electrically connected to the front lock main board via a wire. The end of the display module is inserted into the middle of the front housing. The display module works in conjunction with the front button. The display module outputs and displays the password input interface, door lock status, and alarm information through the front lock main board.

[0013] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system for the smart door lock described in this invention, a charging socket is encapsulated at the center of the bottom of the front shell, the charging socket is electrically connected to the front lock main board via a wire, and a sound outlet is provided on the inner side wall of the front shell for use with the speaker of the front lock main board.

[0014] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system for the smart door lock described in this invention, a guide rod is inserted into the side wall of the lock housing, the end of the guide rod is inserted into the side wall of the lock body, and the guide rod is symmetrically arranged on both sides of the pivot.

[0015] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system for the smart door lock described in this invention, the drive module includes a lower shell fixedly connected inside the rear shell, a main gear rotatably mounted on one side inside the lower shell, a secondary gear rotatably mounted on the other side inside the lower shell, and a drive block rotatably mounted at the center of the lower shell. The drive block is sleeved on the side wall of the knob end, and a boss edge that engages with the groove on the side wall of the knob is formed on the inner side of the drive block. The side wall of the main gear meshes with the side wall of the secondary gear, and the other side of the secondary gear meshes with the rack on the side wall of the drive block. A bevel gear is installed at the end of the main gear for use with the end of the motor output shaft, and the main gear is connected to the end of the motor output shaft through the bevel gear.

[0016] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system for the smart door lock described in this invention, wherein: the lower shell sidewall is sealed and inserted with the upper shell, the upper shell sidewall is equipped with bolts connected to the lower shell sidewall, the end of the drive block is rotatably installed inside the central through hole of the upper shell, and the end of the drive block is equipped with a snap ring rotatably connected to the upper shell sidewall.

[0017] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system of the smart door lock described in this invention, a rear button is inserted into the side wall of the rear shell, the end of the rear button is in elastic contact with the button on the side wall of the rear lock main board, an avoidance hole is provided in the middle of the side wall of the rear shell to cooperate with the indicator light on the side wall of the rear lock main board, and the rear button is symmetrically arranged on both sides of the avoidance hole on the side wall of the rear shell.

[0018] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system for the smart door lock described in this invention, the rear lock motherboard has a built-in AES-256 encryption chip to perform end-to-end encryption on remote communication data (unlocking commands, status feedback, and camera footage). It also integrates a WiFi module and a Bluetooth module, acting as a gateway for remote communication. The Bluetooth module limits the communication range to 0.5-3 meters through power adjustment to prevent remote relay attacks. The WiFi module employs a "always-on" mechanism, sending a heartbeat packet (containing device ID and battery level) every 30-60 seconds to ensure a remote command response time of ≤5 seconds.

[0019] As a preferred embodiment of the remote unlocking and opening / closing status monitoring system for the smart door lock described in this invention, the front lock motherboard includes a remote interaction module and an automatic control module. The temporary access control mechanism of the remote interaction module is as follows: the user terminal requests a temporary key with an expiration time (adjustable from 1 minute to 24 hours) from the rear lock motherboard. The key contains a timestamp and a unique device identifier and is sent to the user terminal via WiFi. After the key is verified by the front lock motherboard, it can only trigger the unlocking action once. It will automatically expire and clear the local record. This is suitable for temporary visitor scenarios such as express delivery and maintenance. The delay time of the automatic control module can be adjusted (0-10 seconds) via the front button or the user terminal APP, and supports "Do Not Disturb Mode" (such as turning off automatic locking from 10 pm to 6 am the next day). When abnormal extension or retraction of the lock tongue is detected (such as the displacement sensor 404 detecting that the target position is not reached within 10 seconds), the front lock motherboard drives the motor to reverse and reset, and pushes a "lock tongue stuck" alarm to the user terminal.

[0020] A method for remotely unlocking and monitoring the open / closed status of a smart door lock, comprising the following steps:

[0021] Step 1: Real-time Status Monitoring and Judgment

[0022] The status monitoring component continuously collects and integrates data: the displacement sensor detects the extension and retraction distance of the bolt at the end of the lock body (extending ≥15mm is determined as "locked", retracting ≤2mm is determined as "unlocked"), and the angle sensor of the bolt drive position synchronously verifies the bolt status;

[0023] The magnet on the door frame works in conjunction with the latch guide block. When the door is closed (with a gap of ≤5mm), the Hall sensor is triggered and a "door closed" signal is output. When the door is opened, the signal disappears, indicating that the door is open.

[0024] The front locking main board integrates the above data to generate three types of status information: "door closed / locked", "door closed / unlocked", and "door open", which are then transmitted to the rear locking main board via wires.

[0025] Step Two: Initiating and Transmitting Remote Unlock Commands

[0026] Users initiate a remote unlocking request through the terminal APP, and verify their identity by entering the management password or biometrics (such as fingerprint);

[0027] After successful verification, the APP generates an unlocking command with a timestamp, which is encrypted using the AES-256 algorithm and transmitted to the WiFi module of the rear lock motherboard via mobile network or WiFi.

[0028] Step 3: Remote unlocking command execution and status feedback:

[0029] After the front locking motherboard verifies the validity of the command, it drives the motor of the rear locking component to rotate forward;

[0030] The motor drives the drive block through the main gear and auxiliary gear of the drive module, which drives the knob and the shaft to rotate, and the lock tongue retracts to the unlocked state of ≤2mm.

[0031] After the displacement sensor detects the "unlocked" state, it sends feedback to the front lock mainboard via the rear lock mainboard, and then pushes it to the user terminal APP, displaying "unlocked successfully"; at the same time, the display module synchronously displays the status, and the speaker emits a prompt tone;

[0032] When the smart lock is unlocked locally (indoor unlocking, fingerprint or password or card unlocking from outside), the unlocking information will be sent to the administrator's mobile phone via Wi-Fi to monitor the unlocking status in real time.

[0033] Step 4: Automatic Locking Triggering and Execution:

[0034] When the current lock mainboard determines the status as "door closed but not locked" (door closed and bolt not extended), the automatic control module will start with an adjustable delay of 0-10 seconds (default 3 seconds, which can be set via the front button or APP).

[0035] If the status monitoring component detects "door open" (magnetic sensing disappears) during the delay period, automatic locking will be immediately suspended.

[0036] When the delay ends and the door remains closed, the front lock mainboard drive motor reverses, driving the bolt to extend to ≥15mm (locked state) through the drive module, and pushes the "automatic locking successful" status to the APP.

[0037] Step 5: Temporary Permission Request and Usage:

[0038] Users can apply for temporary unlocking permission from the rear lock motherboard through the terminal APP and set the time limit (1 minute to 24 hours).

[0039] The rear lock motherboard generates a temporary key containing a timestamp and a unique device identifier, and sends it to the user terminal via WiFi;

[0040] Visitors enter a temporary key via the front button. Once the front lock motherboard verifies the key, it triggers a single unlock (the process is the same as step 3). The key expires automatically and the local record is cleared.

[0041] Step Six: Exception Handling and Local Prompts:

[0042] If the displacement sensor detects that the bolt has not reached the target position within 10 seconds (stuck), the front lock mainboard drive motor will reverse and reset, and at the same time push a "bolt stuck" alarm to the APP;

[0043] The three-color LED indicator on the rear lock motherboard provides feedback on the system status through the lighting mode (a solid green light indicates normal locking, a flashing yellow light indicates unlocking, and a flashing red light indicates an abnormality), which, together with the speaker in the front shell sound outlet, provides local prompts (such as low battery alarm and abnormal unlocking alarm).

[0044] The beneficial effects of this invention are as follows: By linking the magnet 403 with dual sensors (displacement + angle), it can distinguish between "locked / closed," "unlocked / closed," and "open" states in real time, solving the problem of "state misjudgment" in traditional door locks; family members' unlocking information is pushed to the APP in real time, making it convenient for parents to keep track of their children's return home. The adjustable delay + door opening pause mechanism prevents the lock tongue from getting stuck when users bring items or return from grocery shopping, completely solving the rigidity defects of the old design; it supports a "do not disturb mode" (such as automatic locking when closing at night), catering to user habits.

[0045] It eliminates the cost and installation complexity of an external gateway. The time-limited key is valid only once and automatically expires, eliminating the need for physical key handover. This meets temporary unlocking needs such as for delivery or repairs, improving convenience. When unlocking the smart lock locally (indoor unlocking, external fingerprint, password, or card unlocking), the unlocking information is sent to the administrator's mobile phone via Wi-Fi, allowing real-time monitoring of the unlocking status. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0047] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0048] Figure 2 This is a side view perspective three-dimensional structural diagram of the present invention.

[0049] Figure 3 This is a schematic diagram of the internal component structure of the present invention.

[0050] Figure 4This is a schematic diagram of the overall structure of the present invention in its unfolded state.

[0051] Figure 5 This is a three-dimensional structural diagram of the driving module of the present invention.

[0052] Figure 6 This is a schematic diagram of the internal structure of the drive module of the present invention.

[0053] In the diagram: 100, Front lock assembly; 101, Front shell; 102, Front lock frame; 103, Front lock main board; 104, Front button; 105, Adapter plate; 106, Fingerprint module; 107, Display module; 108, Charging socket; 200, Lock body assembly; 201, Front sealing plate; 202, Lock shell; 203, Connecting ring; 204, Lock cylinder; 205, Lock body; 206, Rotary shaft; 207, Guide rod; 300, Rear lock assembly; 30 1. Rear lock frame; 302. Rear shell; 303. Rear lock main board; 304. Battery; 305. Knob; 306. Drive module; 3061. Lower shell; 3062. Main gear; 3063. Secondary gear; 3064. Drive block; 3065. Upper shell; 307. Motor; 308. Rear button; 400. Status monitoring component; 401. Lock tongue guide block; 402. Lock tongue positioning block; 403. Magnet; 404. Displacement sensor. Detailed Implementation

[0054] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0055] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0056] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0057] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0058] Example 1

[0059] Reference Figure 1-6 This is the first embodiment of the present invention, which provides a remote unlocking and opening / closing status monitoring system for a smart door lock, comprising:

[0060] The front lock assembly 100 includes a front housing 101, a front lock frame 102 fixedly connected to the side wall of the front housing 101, a front lock main board 103 fixedly connected to the center of the front lock frame 102, and a front button 104 fitted into the side wall of the front housing 101, with the end of the front button 104 in elastic contact with the button on the side wall of the front lock main board 103.

[0061] The lock body assembly 200 includes a front sealing plate 201 fixedly connected to the side wall of the front lock frame 102, a lock shell 202 fixedly connected to the side wall of the front sealing plate 201, a connecting ring 203 fixedly connected to the middle of the lock shell 202, a lock cylinder 204 threadedly connected to the end of the connecting ring 203, and a lock body 205 snapped into the end of the lock shell 202. A rotating shaft 206 is inserted into the center of the lock body 205. One end of the rotating shaft 206 is inserted into the side wall of the lock cylinder 204, and the end of the lock cylinder 204 is rotatably mounted on the side wall of the front shell 101.

[0062] The rear lock assembly 300 includes a rear lock frame 301 inserted into the side wall of the lock housing 202, a rear housing 302 fixedly connected to the end of the rear lock frame 301, a rear lock main board 303 fixedly connected to the middle of the rear housing 302, a battery 304 inserted into the inner side of the rear housing 302, and a knob 305 rotatably connected to the end of the rear housing 302. The end terminal of the battery 304 is snapped into the middle of the terminal block on the side wall of the rear lock main board 303. The battery 304 is electrically connected to the rear lock main board 303 through the terminal and the terminal block. The end of the knob 305 is snapped into the other end of the rotating shaft 206. A drive module 306 is fixedly connected inside the rear housing 302. The drive module 306 is sleeved on the side wall of the end of the knob 305. A motor 307 is adapted to be installed on the side wall of the rear lock main board 303. The end of the output shaft of the motor 307 is connected to the drive module 306 for transmission. The rear lock main board 303 and the front lock main board 103 are electrically connected through wires encapsulated inside the lock housing 202.

[0063] The status monitoring component 400 includes a latch guide block 401 fixedly connected to the end of the lock body 205, a latch positioning block 402 encapsulated in the side wall of the door frame and used in conjunction with the latch guide block 401, a magnet 403 encapsulated inside the latch positioning block 402, and a displacement sensor 404 fixedly connected to the side wall of the latch guide block 401. The latch at the end of the lock body 205 is inserted into the center of the latch guide block 401. The center of the latch positioning block 402 has a positioning hole that works in conjunction with the latch at the end of the lock body 205. The sensing area of ​​the displacement sensor 404 is located on the side wall of the latch at the end of the lock body 205.

[0064] Specifically, the front lock assembly 100 also includes an adapter plate 105 fixedly connected to the side wall of the front lock frame 102, a fingerprint module 106 fixedly connected to the top of the adapter plate 105, and a display module 107 snapped onto the side wall of the adapter plate 105. The top side wall of the front shell 101 has a clearance hole for use with the fingerprint module 106. The end of the fingerprint module 106 is inserted into the inside of the clearance hole at the top of the front shell 101. The bottom of the display module 107 is electrically connected to the front lock main board 103 through a wire. The end of the display module 107 is inserted into the middle of the front shell 101. The display module 107 is used in conjunction with the front button 104. The display module 107 outputs the password input interface, door lock status, and alarm information through the front lock main board 103.

[0065] Furthermore, a charging socket 108 is encapsulated at the center of the bottom of the front cover 101. The charging socket 108 is electrically connected to the front lock main board 103 via a wire, and a sound outlet is provided on the inner side wall of the front cover 101 to cooperate with the speaker of the front lock main board 103.

[0066] Preferably, a guide rod 207 is inserted into the side wall of the lock housing 202, the end of the guide rod 207 is inserted into the side wall of the lock body 205, and the guide rod 207 is symmetrically arranged on both sides of the pivot 206.

[0067] Preferably, the drive module 306 includes a lower shell 3061 fixedly connected inside the rear shell 302, a main gear 3062 rotatably mounted on one side inside the lower shell 3061, a secondary gear 3063 rotatably mounted on the other side inside the lower shell 3061, and a drive block 3064 rotatably mounted at the center of the lower shell 3061. The drive block 3064 is sleeved on the end side wall of the knob 305, and the inner side of the drive block 3064 has a boss edge that engages with the groove on the side wall of the knob 305. The side wall of the main gear 3062 meshes with the side wall of the secondary gear 3063, and the other side of the secondary gear 3063 meshes with the rack on the side wall of the drive block 3064. The end of the main gear 3062 is equipped with a bevel gear that works with the end of the output shaft of the motor 307. The main gear 3062 is connected to the end of the output shaft of the motor 307 through the bevel gear.

[0068] Specifically, the lower shell 3061 is sealed to the side wall of the upper shell 3065, the side wall of the upper shell 3065 is fitted with bolts that connect to the side wall of the lower shell 3061, the end of the drive block 3064 is rotatably mounted inside the central through hole of the upper shell 3065, and the end of the drive block 3064 is fitted with a snap ring that is rotatably connected to the side wall of the upper shell 3065.

[0069] Preferably, a rear button 308 is inserted into the side wall of the rear cover 302, and the end of the rear button 308 makes elastic contact with the button on the side wall of the rear lock main board 303. An avoidance hole is provided in the middle of the side wall of the rear cover 302 to cooperate with the indicator light on the side wall of the rear lock main board 303. The rear button 308 is symmetrically arranged on both sides of the avoidance hole on the side wall of the rear cover 302.

[0070] Furthermore, the rear lock motherboard 303 incorporates an AES-256 encryption chip to perform end-to-end encryption on remote communication data (unlocking commands, status feedback, and camera footage). It also integrates WiFi and Bluetooth modules, acting as a gateway for remote communication. The Bluetooth module limits the communication range to 0.5-3 meters through power adjustment to prevent remote relay attacks. The WiFi module adopts a "always-on" mechanism, sending a heartbeat packet (containing device ID and battery level) every 30-60 seconds to ensure that the remote command response time is ≤5 seconds.

[0071] Furthermore, the front lock motherboard 103 also includes a remote interaction module and an automatic control module. The temporary access control mechanism of the remote interaction module is as follows: the user terminal requests a temporary key with an expiration time (adjustable from 1 minute to 24 hours) from the rear lock motherboard 303. The key contains a timestamp and a unique device identifier and is sent to the user terminal via WiFi. After the key is verified by the front lock motherboard 103, it can only trigger the unlocking action once. It will automatically expire and the local record will be cleared. This is suitable for temporary visitor scenarios such as express delivery and maintenance. The delay time of the automatic control module can be adjusted (0-10 seconds) via the front button 104 or the user terminal APP, and supports "Do Not Disturb Mode" (such as turning off automatic locking from 10 pm to 6 am the next day). When abnormal extension or retraction of the lock tongue is detected (such as the displacement sensor 404 detecting that the target position has not been reached within 10 seconds), the front lock motherboard 103 drives the motor 307 to reverse and reset, and pushes a "lock tongue stuck" alarm to the user terminal at the same time.

[0072] Among them, (i) the front locking component 100 is the core of local interaction and control;

[0073] The front shell 101 serves as an external protective shell, with the front button 104 embedded in its side wall. Its end is in elastic contact with the front lock main board 103 in the center of the front lock frame 102, forming an "button-main board" operation link for password input and function switching (such as unlocking automatic locking).

[0074] Biometric identification and display module: A fingerprint module 106 is fixed to the top of the adapter plate 105 on the side wall of the front lock frame 102, and its end is inserted into the clearance hole at the top of the front shell 101 to achieve 360° fingerprint recognition through the semiconductor fingerprint head; a display module 107 is snapped onto the side wall of the adapter plate 105, and its end is embedded in the middle of the front shell 101. It is connected to the front lock main board 103 through wires and is used to display the password input interface, door lock status, such as "locked", "low battery" and alarm information.

[0075] Emergency and prompt structure: The bottom of the front shell 101 is encapsulated with a charging socket 108, which is connected to the front lock main board 103 through a wire for emergency power supply when the front lock is powered off; the internal side wall has a sound hole, which works with the speaker of the front lock main board 103 to provide local operation prompts (such as "incorrect password" "unlocked successfully") and alarm sound (volume ≥60dB).

[0076] (ii) The lock body assembly 200 is the core of mechanical transmission and locking execution;

[0077] The lock body assembly is the central mechanical transmission link connecting the front and rear locks, responsible for the physical extension and retraction of the bolt. Its structure includes:

[0078] Fixing and protection structure: The front sealing plate 201 is fixed to the side wall of the front lock frame 102 and serves as the connecting carrier between the front lock assembly and the lock housing 202; the lock housing 202 provides protection for the internal transmission components, with a fixed connecting ring 203 in the middle and a threaded connection at the end of the ring to the lock cylinder 204, ensuring stable transmission between the lock cylinder and the rotating shaft 206.

[0079] Transmission and locking structure: The lock body 205 is snapped onto the end of the lock shell 202, and the rotating shaft 206 is inserted into the center. One end is connected to the side wall of the lock cylinder 204, and the other end extends to the rear lock assembly. The lock tongue at the end of the lock body 205 can extend and retract along the lock tongue guide block 401 to realize the physical locking / unlocking of the door.

[0080] Structural reinforcement design: Guide rods 207 are symmetrically inserted into the side wall of the lock shell 202, and the ends are inserted into the lock body 205 to enhance the impact resistance of the lock body (can withstand ≥500N impact force) and prevent structural deformation caused by violent prying.

[0081] (iii) The rear lock assembly 300 is the core of remote communication and drive;

[0082] The rear locking component is the central hub for remote control, integrating gateway functions and driving mechanisms. Its structure includes:

[0083] Load-bearing and power supply structure: The rear lock frame 301 is inserted into the side wall of the lock housing 202, and the end of the rear housing 302 is fixed; the battery 304 is inserted into the inside of the rear housing 302, and its end terminal is snapped into the terminal block of the rear lock main board 303 to supply power to the rear lock main board; the rear button 308 is inserted into the side wall of the rear housing 302, and its end is in elastic contact with the rear lock main board 303 for manual unlocking / locking.

[0084] Communication and control core: The rear lock motherboard 303 is fixed in the middle of the rear shell 302 to realize the data interaction between the front lock and the remote terminal; it is connected to the front lock motherboard 103 through the wires inside the lock shell 202 to realize local data transmission.

[0085] The drive module 306 is fixed inside the rear housing 302 and consists of a lower housing 3061, a main gear 3062, a secondary gear 3063, a drive block 3064, and an upper housing 3065.

[0086] The lower shell 3061 and the upper shell 3065 are connected by bolts to form a dustproof and waterproof cavity (protection level IP54).

[0087] The main gear 3062 is driven by the output shaft of the motor 307 through a bevel gear, and the secondary gear 3063 meshes with the rack of the main gear 3062 and the drive block 3064 respectively;

[0088] The drive block 3064 is sleeved on the end of the knob 305, and the inner boss engages with the groove of the knob 305. The motor 307 rotates forward / reverse through gear transmission to drive the knob 305 to rotate, thereby driving the rotating shaft 206 and the locking tongue to extend and retract.

[0089] (iv) The status monitoring component 400 is used to monitor the linkage between the door body and the latch status;

[0090] The status monitoring component 400 achieves accurate detection of door opening / closing and latch status through multi-sensor collaboration. Its structure includes:

[0091] Lock tongue guiding and positioning structure: Lock tongue guide block 401 is fixed to the end of lock body 205 to provide guidance for the extension and retraction of lock tongue; Lock tongue positioning block 402 on the side wall of door frame has a positioning hole in the center, which cooperates with lock tongue to ensure locking accuracy.

[0092] Door status detection: The latch positioning block 402 encapsulates a magnet 403, which works in conjunction with the latch guide block 401. When the door is closed (spacing ≤ 5mm), the magnet 403 triggers the Hall effect in the latch guide block 401 and outputs a "door closed" signal. When the door is open, the signal disappears, thus realizing the door status judgment.

[0093] Lock tongue status detection: A displacement sensor 404 is fixed on the side wall of the lock tongue guide block 401. The sensing area corresponds to the side wall of the lock tongue to detect whether the lock tongue is extended (≥15mm is determined to be "locked") or retracted (≤2mm is determined to be "unlocked"). An angle sensor is added to the lock tongue drive position to work together with the displacement sensor 404 to verify and ensure the accuracy of status detection.

[0094] In use, the system achieves remote unlocking, automatic locking, and status monitoring through a closed-loop process of "local operation / remote command - driver execution - status feedback." The specific working logic is as follows:

[0095] (a) Local unlocking process (password / fingerprint)

[0096] Password unlocking: The user enters the password through the front button 104. After the front lock motherboard 103 verifies the password, it sends a command to the rear lock motherboard 303.

[0097] Fingerprint unlocking: The user presses their finger on the fingerprint module 106, the module collects the fingerprint information and transmits it to the front lock main board 103, and triggers the unlocking command after successful verification;

[0098] Drive execution: The rear lock main board 303 drives the motor 307 to rotate forward, the main gear 3062 drives the drive block 3064 to rotate through the secondary gear 3063, the knob 305 rotates synchronously with the rotating shaft 206, and the lock tongue retraction displacement sensor detects ≤2mm).

[0099] Status feedback: Display module 107 displays "unlocked", the speaker emits a prompt tone, and after the status is cleared, the lock motherboard 303 pushes the notification to the user terminal.

[0100] (II) Remote unlocking process

[0101] Command Initiation: The user sends a remote unlocking command through the terminal APP, which is encrypted and transmitted via WiFi to the WiFi module of the rear lock mainboard 303;

[0102] Decryption and verification: The rear lock motherboard 303 decrypts the command through the AES-256 chip, verifies the user's permissions, and then sends the command to the front lock motherboard 103 via the data cable;

[0103] Drive and feedback: The front lock mainboard 103 drives the motor 307 to rotate forward, and the bolt retracts; the displacement sensor 404 detects the "unlocked" state and transmits it back to the rear lock mainboard 303 via Bluetooth, and then pushes it to the user terminal (response time ≤ 5 seconds), completing the remote unlocking closed loop.

[0104] (iii) Status monitoring and automatic locking

[0105] Status linkage perception: Status monitoring components integrate data in real time;

[0106] Magnet 403 works in conjunction with latch guide block 401 to detect the opening and closing of the door;

[0107] Displacement sensor 404 and angle sensor detect the state of the latch;

[0108] The front lock motherboard 103 generates three statuses: "Door closed / locked", "Door closed / unlocked", and "Door open", which are then pushed to the APP via the rear lock motherboard 303.

[0109] Automatic locking mechanism:

[0110] When "door closed but not locked" is detected (door closed and bolt not extended), the automatic control module starts with an adjustable delay of 0-10 seconds (default 3 seconds, which can be adjusted via front button 104 or APP).

[0111] After the delay ends, motor 307 reverses to extend the bolt (≥15mm) and completes automatic locking;

[0112] If the door opens during the delay period (when the magnetic sensor disappears), immediately stop locking to prevent the bolt from jamming.

[0113] (iv) Temporary access control (applicable to visitor scenarios)

[0114] Permission Request: Users can request temporary permissions from the rear lock motherboard 303 via the terminal APP and set the time limit (1 minute - 24 hours).

[0115] Key generation and distribution: The rear lock motherboard 303 generates a temporary key containing a timestamp and device identifier, and distributes it to the user terminal via WiFi;

[0116] Verification and unlocking: When a visitor enters a key, the front lock motherboard 103 verifies the key and triggers a single unlock. The key expires and is automatically invalidated and the record is cleared, ensuring that permissions are controllable.

[0117] In summary, by linking the 403 magnet with dual sensors (displacement + angle), the system can distinguish between "locked / closed," "unlocked / closed," and "open" states in real time, solving the problem of "state misjudgment" in traditional door locks. Family members' unlocking information is pushed to the app in real time, allowing parents to easily track their children's return home. An adjustable delay and door-opening pause mechanism prevents the latch from jamming when users return home with items or groceries, completely overcoming the rigidity of old designs. A "do not disturb" mode (such as automatic locking at night) is also supported, catering to user habits.

[0118] It eliminates the cost and installation complexity of an external gateway. The time-limited key is valid only once and automatically expires, eliminating the need for physical key handover. This meets temporary unlocking needs such as for delivery or repairs, improving convenience. When unlocking the smart lock locally (indoor unlocking, external fingerprint, password, or card unlocking), the unlocking information is sent to the administrator's mobile phone via Wi-Fi, allowing real-time monitoring of the unlocking status.

[0119] Example 2

[0120] Reference Figure 1-6 This is the second embodiment of the present invention, which differs from the first embodiment in that it provides a method for remotely unlocking and monitoring the open / closed status of a smart door lock, comprising the following steps:

[0121] Step 1: Real-time Status Monitoring and Judgment

[0122] The status monitoring component continuously collects and integrates data: the displacement sensor 404 detects the extension and retraction distance of the bolt at the end of the lock body 205 (extending ≥15mm is determined as "locked", retracting ≤2mm is determined as "unlocked"), and the angle sensor of the bolt drive position synchronously verifies the bolt status;

[0123] The magnet 403 on the door frame cooperates with the latch guide block 401. When the door is closed (the gap is ≤5mm), the Hall sensor is triggered and a "door closed" signal is output. When the door is opened, the signal disappears and it is determined that the "door is open".

[0124] The front locking main board 103 integrates the above data to generate three types of status information: "door closed and locked", "door closed and unlocked" and "door open", which are then transmitted to the rear locking main board 303 via wires.

[0125] Step Two: Initiating and Transmitting Remote Unlock Commands

[0126] Users initiate a remote unlocking request through the terminal APP, and verify their identity by entering the management password or biometrics (such as fingerprint);

[0127] After successful verification, the APP generates an unlocking command with a timestamp, which is encrypted using the AES-256 algorithm and transmitted to the WiFi module of the rear lock motherboard 303 via mobile network or WiFi.

[0128] Step 3: Remote unlocking command execution and status feedback:

[0129] After the front lock motherboard 103 verifies the legality of the command, it drives the motor 307 of the rear lock assembly 300 to rotate forward;

[0130] The motor 307 drives the drive block 3064 through the main gear 3062 and the auxiliary gear 3063 of the drive module 306, which drives the knob 305 and the rotating shaft 206 to rotate, and the lock tongue retracts to the unlocked state of ≤2mm.

[0131] After the displacement sensor 404 detects the "unlocked" state, it feeds back to the front lock mainboard 103 through the rear lock mainboard 303, and then pushes it to the user terminal APP, displaying "unlocked successfully"; at the same time, the display module 107 displays the status synchronously, and the speaker emits a prompt tone.

[0132] When the smart lock is unlocked locally (indoor unlocking, fingerprint or password or card unlocking from outside), the unlocking information will be sent to the administrator's mobile phone via Wi-Fi to monitor the unlocking status in real time.

[0133] Step 4: Automatic Locking Triggering and Execution:

[0134] When the current lock mainboard 103 determines the status as "door closed but not locked" (door closed and bolt not extended), the automatic control module starts with an adjustable delay of 0-10 seconds (default 3 seconds, which can be set via the front button 104 or the APP).

[0135] If the status monitoring component detects "door open" (magnetic sensing disappears) during the delay period, automatic locking will be immediately suspended.

[0136] When the delay ends and the door remains closed, the front lock main board 103 drives the motor 307 to reverse, which drives the bolt to extend to ≥15mm (locked state) through the drive module 306, and pushes the "automatic locking successful" status to the APP.

[0137] Step 5: Temporary Permission Request and Usage:

[0138] Users can apply for temporary unlocking permission from the rear lock motherboard 303 through the terminal APP and set the time limit (1 minute to 24 hours).

[0139] The rear lock motherboard 303 generates a temporary key containing a timestamp and a unique device identifier, and sends it to the user terminal via WiFi;

[0140] Visitors enter a temporary key via the front button 104. After successful verification by the front lock motherboard 103, a single unlock is triggered (the process is the same as step 3). The key expires automatically and the local record is cleared.

[0141] Step Six: Exception Handling and Local Prompts:

[0142] If the displacement sensor 404 detects that the bolt has not reached the target position within 10 seconds (stuck), the front lock main board 103 drives the motor 307 to reverse and reset, and at the same time pushes a "bolt stuck" alarm to the APP.

[0143] The three-color LED indicator on the rear lock motherboard 303 provides feedback on the system status through the lighting mode (a solid green light indicates normal locking, a flashing yellow light indicates unlocking, and a flashing red light indicates an abnormality). It works in conjunction with the speaker at the sound outlet of the front shell 101 to provide local prompts (such as low battery alarm and abnormal unlocking alarm).

[0144] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0145] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0146] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A remote unlocking and opening / closing status monitoring system for a smart door lock, characterized in that: include, The front lock assembly (100) includes a front shell (101), a front lock frame (102) fixedly connected to the side wall of the front shell (101), a front lock main board (103) fixedly connected to the center of the front lock frame (102), and a front button (104) fitted into the side wall of the front shell (101), wherein the end of the front button (104) is in elastic contact with the button on the side wall of the front lock main board (103); The lock body assembly (200) includes a front sealing plate (201) fixedly connected to the side wall of the front lock frame (102), a lock shell (202) fixedly connected to the side wall of the front sealing plate (201), a connecting ring (203) fixedly connected to the middle of the lock shell (202), a lock cylinder (204) threadedly connected to the end of the connecting ring (203), and a lock body (205) snapped onto the end of the lock shell (202). A rotating shaft (206) is inserted into the center of the lock body (205), one end of the rotating shaft (206) is inserted into the side wall of the lock cylinder (204), and the end of the lock cylinder (204) is rotatably mounted on the side wall of the front shell (101). The rear lock assembly (300) includes a rear lock frame (301) inserted into the side wall of the lock housing (202), a rear shell (302) fixedly connected to the end of the rear lock frame (301), a rear lock main board (303) fixedly connected to the middle of the rear shell (302), a battery (304) inserted into the inner side of the rear shell (302), and a knob (305) rotatably connected to the end of the rear shell (302). The terminal of the battery (304) is snapped into the middle of the terminal block on the side wall of the rear lock main board (303). The battery (304) is connected to the rear lock frame (202) through the terminal and the terminal block. The main lock board (303) is electrically connected, the end of the knob (305) is snapped into the other end of the rotating shaft (206), the drive module (306) is fixedly connected inside the rear shell (302), the drive module (306) is sleeved on the side wall of the end of the knob (305), the side wall of the rear lock main board (303) is adapted to install a motor (307), the end of the output shaft of the motor (307) is connected to the drive module (306) for transmission, and the rear lock main board (303) and the front lock main board (103) are electrically connected through wires encapsulated inside the lock shell (202); The status monitoring component (400) includes a latch guide block (401) fixedly connected to the end of the lock body (205), a latch positioning block (402) encapsulated in the side wall of the door frame and used in conjunction with the latch guide block (401), a magnet (403) encapsulated inside the latch positioning block (402), and a displacement sensor (404) fixedly connected to the side wall of the latch guide block (401). The latch at the end of the lock body (205) is inserted into the center of the latch guide block (401). The center of the latch positioning block (402) is provided with a positioning hole that is used in conjunction with the latch at the end of the lock body (205). The sensing area of ​​the displacement sensor (404) is located on the side wall of the latch at the end of the lock body (205).

2. The remote unlocking and opening / closing status monitoring system for smart door locks according to claim 1, characterized in that: The front lock assembly (100) further includes an adapter plate (105) fixedly connected to the side wall of the front lock frame (102), a fingerprint module (106) fixedly connected to the top of the adapter plate (105), and a display module (107) snapped onto the side wall of the adapter plate (105). The top side wall of the front shell (101) is provided with a clearance hole for use with the fingerprint module (106). The end of the fingerprint module (106) is inserted into the inside of the clearance hole at the top of the front shell (101). The bottom of the display module (107) is electrically connected to the front lock main board (103) through a wire. The end of the display module (107) is inserted into the middle of the front shell (101). The display module (107) is used in conjunction with the front button (104). The display module (107) outputs the password input interface, door lock status and alarm information through the front lock main board (103).

3. The remote unlocking and opening / closing status monitoring system for smart door locks according to claim 2, characterized in that: A charging socket (108) is encapsulated at the center of the bottom of the front shell (101). The charging socket (108) is electrically connected to the front locking main board (103) via a wire. The inner side wall of the front shell (101) is provided with a sound outlet hole that works in conjunction with the speaker of the front locking main board (103).

4. The remote unlocking and opening / closing status monitoring system for smart door locks according to claim 3, characterized in that: A guide rod (207) is inserted into the side wall of the lock housing (202), and the end of the guide rod (207) is inserted into the side wall of the lock body (205). The guide rod (207) is symmetrically arranged on both sides of the pivot (206).

5. The remote unlocking and opening / closing status monitoring system for smart door locks according to claim 4, characterized in that: The drive module (306) includes a lower shell (3061) fixedly connected inside the rear shell (302), a main gear (3062) rotatably mounted on one side inside the lower shell (3061), a secondary gear (3063) rotatably mounted on the other side inside the lower shell (3061), and a drive block (3064) rotatably mounted at the center of the lower shell (3061). The drive block (3064) is sleeved on the end sidewall of the knob (305), and the drive block (3066) 4) An inner side is provided with a boss that engages with the groove on the side wall of the knob (305). The side wall of the main gear (3062) meshes with the side wall of the auxiliary gear (3063), and the other side of the auxiliary gear (3063) meshes with the rack on the side wall of the drive block (3064). The end of the main gear (3062) is equipped with a bevel gear that works with the end of the output shaft of the motor (307). The main gear (3062) is connected to the end of the output shaft of the motor (307) through the bevel gear.

6. The remote unlocking and opening / closing status monitoring system for smart door locks according to claim 5, characterized in that: The lower shell (3061) is sealed and inserted into the side wall of the upper shell (3065). The side wall of the upper shell (3065) is equipped with bolts that connect to the side wall of the lower shell (3061). The end of the drive block (3064) is rotatably installed inside the central through hole of the upper shell (3065), and the end of the drive block (3064) is equipped with a snap ring that is rotatably connected to the side wall of the upper shell (3065).

7. The remote unlocking and opening / closing status monitoring system for smart door locks according to claim 6, characterized in that: A rear button (308) is inserted into the side wall of the rear shell (302). The end of the rear button (308) is in elastic contact with the button on the side wall of the rear lock main board (303). An avoidance hole is provided in the middle of the side wall of the rear shell (302) to cooperate with the indicator light on the side wall of the rear lock main board (303). The rear button (308) is symmetrically arranged on both sides of the avoidance hole on the side wall of the rear shell (302).

8. The remote unlocking and opening / closing status monitoring system for smart door locks according to claim 7, characterized in that: The rear lock motherboard (303) has a built-in AES-256 encryption chip to encrypt remote communication data (unlocking commands, status feedback, and camera footage) end-to-end. It also integrates a WiFi module and a Bluetooth module to act as a gateway for remote communication. The Bluetooth module limits the communication range to 0.5-3 meters through power adjustment to prevent remote relay attacks. The WiFi module adopts a "always-on" mechanism, sending a heartbeat packet (including device ID and battery level) every 30-60 seconds to ensure that the remote command response time is ≤5 seconds.

9. The remote unlocking and opening / closing status monitoring system for a smart door lock according to claim 8, characterized in that: The front locking motherboard (103) also includes a remote interaction module and an automatic control module. The temporary permission management mechanism of the remote interaction module is as follows: the user terminal applies to the rear locking motherboard (303) for a temporary key with an expiration time (adjustable from 1 minute to 24 hours). The key contains a timestamp and a unique device identifier and is sent to the user terminal via WiFi. After the key is verified by the front locking motherboard (103), it can only trigger the unlocking action once. It will automatically expire and clear the local record. It is suitable for temporary visitor scenarios such as express delivery and maintenance. The delay time of the automatic control module can be adjusted (0-10 seconds) by the front button (104) or the user terminal APP, and supports "Do Not Disturb Mode" (automatic locking is turned off from 10 pm to 6 am the next day). When abnormal extension and retraction of the lock tongue is detected (such as the displacement sensor 404 detecting that the target position is not reached within 10 seconds), the front locking motherboard (103) drives the motor (307) to reverse and reset, and pushes a "lock tongue stuck" alarm to the user terminal at the same time.

10. A method for remotely unlocking and monitoring the open / closed status of a smart door lock according to claim 9, characterized in that: Includes the following steps: Step 1: Real-time Status Monitoring and Judgment The status monitoring component continuously collects and integrates data: the displacement sensor detects the extension and retraction distance of the bolt at the end of the lock body (extending ≥15mm is determined as "locked", retracting ≤2mm is determined as "unlocked"), and the angle sensor of the bolt drive position synchronously verifies the bolt status; The magnet on the door frame works with the latch guide block to trigger the Hall sensor when the door is closed (with a gap of ≤5mm) and output a "door closed" signal. The signal disappears when the door is opened, indicating that the door is open. The front locking main board integrates the above data to generate three types of status information: "door closed, locked", "door closed, unlocked" and "door open", which are then transmitted to the rear locking main board via wires. Step Two: Initiating and Transmitting Remote Unlock Commands Users initiate a remote unlocking request through the terminal APP, and verify their identity by entering the management password or biometrics (such as fingerprint); After successful verification, the APP generates an unlocking command with a timestamp, which is encrypted using the AES-256 algorithm and transmitted to the WiFi module of the rear lock motherboard via mobile network or WiFi. Step 3: Remote unlocking command execution and status feedback: After the front locking motherboard verifies the validity of the command, it drives the motor of the rear locking component to rotate forward; The motor drives the drive block through the main gear and auxiliary gear of the drive module, which drives the knob and the shaft to rotate, and the lock tongue retracts to the unlocked state of ≤2mm. After the displacement sensor detects the "unlocked" state, it sends feedback to the front lock mainboard via the rear lock mainboard, and then pushes it to the user terminal APP, displaying "unlocked successfully"; at the same time, the display module synchronously displays the status, and the speaker emits a prompt tone; When the smart lock is unlocked locally (indoor unlocking, fingerprint or password or card unlocking from outside), the unlocking information will be sent to the administrator's mobile phone via Wi-Fi to monitor the unlocking status in real time. Step 4: Automatic Locking Triggering and Execution: When the current lock mainboard determines the status as "door closed but not locked" (door closed and bolt not extended), the automatic control module will start with an adjustable delay of 0-10 seconds (default 3 seconds, which can be set via the front button or APP). If the status monitoring component detects "door open" (magnetic sensing disappears) during the delay period, automatic locking will be immediately suspended; When the delay ends and the door remains closed, the front lock mainboard drive motor reverses, driving the bolt to extend to ≥15mm (locked state) through the drive module, and pushes the "automatic locking successful" status to the APP; Step 5: Temporary Permission Request and Usage: Users can apply for temporary unlocking permission from the rear lock motherboard through the terminal APP and set the time limit (1 minute to 24 hours). The rear lock motherboard generates a temporary key containing a timestamp and a unique device identifier, and sends it to the user terminal via WiFi; Visitors enter a temporary key via the front button. After the front lock motherboard verifies the key, it triggers a single unlock (the process is the same as step 3). The key will automatically become invalid and clear the local record after it expires. Step Six: Exception Handling and Local Prompts: If the displacement sensor detects that the bolt has not reached the target position within 10 seconds (stuck), the front lock mainboard drive motor will reverse and reset, and at the same time push a "bolt stuck" alarm to the APP; The three-color LED indicator on the rear lock motherboard provides feedback on the system status through the lighting mode (a solid green light indicates normal locking, a flashing yellow light indicates unlocking, and a flashing red light indicates an abnormality), which, together with the speaker in the front shell sound outlet, provides local prompts (such as low battery alarm and abnormal unlocking alarm).

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