Anti-theft door lock and anti-theft system thereof
By introducing a servo motor to drive the lock tooth rod and a piezoelectric sensor to detect the lock picking behavior in the door lock, the problem of the blade lock structure being easily pried open is solved, and a highly reliable and flexible anti-theft effect is achieved.
Patent Information
- Application Number
- CN202511287631.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2025-10-10
AI Technical Summary
In the prior art, the blade lock structure is fixed and does not have an electric control structure, and is easily pried open by external prying tools after a long period of prying.
An anti-theft door lock is designed, which includes a lock body, a blade lock core assembly, and an adjustable lock tooth assembly. A servo motor is used to drive the rotation of the lock tooth rod and lock disk, and a piezoelectric sensor is used to detect the lock picking behavior. By combining the electronic control structure with the mechanical structure, dynamic limit and anti-pry protection are provided.
The anti-theft reliability and adaptability of the lock have been improved, which can effectively resist illegal opening methods, ensure the uniqueness of unlocking, and promptly alarm and cut off the communication link when the lock is picked to prevent illegal opening.
Smart Images
Figure CN120759488A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of smart door locks, and more particularly to an anti-theft door lock and an anti-theft system thereof. Background Art
[0002] As the "first line of defense" for homes and commercial spaces, the development of anti-theft door locks has always revolved around the three core needs of "anti-cracking, convenience, and scene adaptation". With the advancement of living patterns, security technology and manufacturing processes, it has undergone a complete iterative cycle from mechanical structure to intelligent interconnection, becoming one of the sub-sectors in the security industry that is most closely related to people's livelihood.
[0003] In existing technologies, door locks often achieve locking through the physical structure of the blade lock itself. Since the blade lock structure is relatively fixed and lacks an electronic control structure, the rotation angle of the lock disk is often also relatively fixed. When an external pick-and-pry tool is used, the pick-and-pry tool can still find the rotation angle of the lock disk through repeated attempts, ultimately successfully picking the lock. In view of this, we propose an anti-theft door lock and its anti-theft system. Summary of the Invention
[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology, adapt to actual needs, and provide an anti-theft door lock and its anti-theft system to solve the technical problem in the current technology that the blade lock structure is fixed and has no electronic control structure, so it is easy to be pried open by external prying tools after a long time of prying.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an anti-theft door lock, comprising a lock body, a blade lock core assembly and an adjustable lock tooth assembly; The blade lock core assembly is arranged in the lock body, and the blade lock core assembly includes a lock disk, a lock disk housing and a gap disk. Several lock disks and several gap disks are respectively arranged in parallel in the lock disk housing, and the gap disk is tightly fitted between two adjacent lock disks. A limit rod is provided on one side of the several lock disks. The lock disk is used to limit the movement of the limit rod, and the limit rod is used to limit the rotation of the blade lock core assembly. The adjustable lock tooth assembly includes a servo motor, a first gear, a second gear, a rack, and a lock tooth rod; several of the servo motors are installed in the lock body, several of the first gears are respectively installed at the output ends of several servo motors, several of the second gears are respectively meshed and connected to several first gears, several of the racks are meshed and connected to several second gears, several of the lock tooth rods are respectively installed on several racks, and the lock tooth rods are slidably connected to the lock disk housing, and the lock tooth rods are used to limit the rotation position of the lock disk.
[0006] Preferably, a top block is installed on the lock disk, and a groove is provided on the lock disk; when several of the top blocks are in the initial position, the grooves at the limit rod are in a staggered state, and the limit rod is in a snap position; when several of the top blocks are in the end position, the grooves at the limit rod are in an aligned state, and the limit rod slides into the groove.
[0007] Preferably, when the plurality of top blocks are aligned, the grooves on the plurality of locking plates are deflected by 0-35° relative to the outermost groove, and the locking plate is further provided with a plurality of adjustment grooves equidistantly located on one side of the groove.
[0008] Preferably, a locking hole is formed in the middle of each of the locking disks, and the locking holes form a hole structure with a rectangular cross section, and the cross section of the hole structure gradually decreases from the outside to the inside.
[0009] Preferably, a movable groove is provided on one side of the lock disk housing, a top block is movably provided in the movable groove, and a through groove is provided on the other side of the lock disk housing, a limiting rod is movably provided in the through groove.
[0010] Preferably, a sliding groove is provided at the top of the movable groove, a locking tooth rod is slidably connected in the sliding groove, and a shift block is installed at the rear of the lock disk housing.
[0011] Preferably, a curved rod and a piezoelectric sensor are installed at the end of the locking rod, a contact plate is installed at the end of the curved rod, and the piezoelectric sensor is arranged between the contact plate and the locking rod.
[0012] Preferably, a smart key is inserted into the lock hole, and several key slots of different depths are provided on the smart key. When the smart key is rotated 90°, the smart key and several key slots are used to rotate several lock disks to different angles, thereby rotating to the respective end positions of the several lock disks.
[0013] An anti-theft system, when used, comprises the following steps: S1, system initial state and smart key trigger: The anti-theft door lock is in the initial locked state. When the smart key with a built-in encryption chip approaches the door lock sensing area, the door lock information receiving module is activated, triggering the system to start; S2. Smart key information verification and command generation: The smart key transmits a data packet to the door lock processing unit, which verifies the information. If the verification fails, the system triggers the buzzer module to sound an alarm, and the adjustable lock tooth assembly remains locked. If the verification passes, the processing unit controls the servo motor to operate. S3, adjustable locking thread assembly drive and locking thread rod positioning: the servo motor matching the number of locking discs is started, and the servo motor drives the locking thread rod to move a preset distance through the transmission member to complete the positioning of the locking thread rod; S4, smart key physical actuation and lock picking behavior detection; S401. Normal unlocking operation: The smart key is inserted into the lock hole. Key slots of different depths contact the inner ring of the lock disk. The smart key applies a rotational torque to the lock disk through the key slot. When several lock disks rotate to different angles and reach their respective end positions, multiple piezoelectric sensors simultaneously receive weak pressure signals. The processing unit determines this as "normal operation." The grooves align with the through grooves of the lock disk housing, and the limit rod slides along the through groove into the aligned groove, releasing the rotation restriction on the blade lock cylinder assembly. S402, Lock-picking Detection and Response: If a lock-picking tool is inserted into the keyhole, the tool only contacts one or several lock disks and pushes the contact plates of the corresponding lock rods, causing some piezoelectric sensors to generate pressure signals independently. The processing unit monitors the sensor signals in real time. If the same piezoelectric sensor generates signals multiple times within a preset time, it is immediately determined to be a "lock-picking behavior." The processing unit controls the locking of the lock rods; triggers the buzzer module to alarm, and sends an encrypted alarm message to the user's mobile phone app; records the lock-picking event to local storage, and simultaneously disconnects the smart key communication link to prohibit subsequent unauthorized activation; S5. Double lock unlocking completion and status feedback: After the blade lock core assembly releases the rotation restriction, the door lock opens and feeds back an encrypted signal of "unlock successful" to the smart key; if an abnormality occurs during the unlocking process, the system re-enters the locked state and issues an alarm.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts the design of a blade lock core assembly and an adjustable lock tooth assembly. The adjustable lock tooth assembly provides dynamic limit protection for the lock disk through precise transmission driven by electric control. The servo motor serves as a power source and can output stable torque according to the key recognition signal or preset instruction to drive the first gear at the output end to rotate. The first gear and the second gear are meshed and transmitted to transmit power to the rack. Since the rack is rigidly connected to the lock tooth rod and the lock tooth rod is slidably engaged in the guide groove of the lock disk shell, the linear movement of the rack will drive the lock tooth rod to slide precisely along the guide groove. When the lock tooth rod is in the initial position, the rotation angle of the lock disk is limited. When unlocking or adjustment is required, the servo motor drives the lock tooth rod to move to a preset distance, and cooperates with the key to drive the lock disk to rotate to achieve unlocking. The present invention improves the anti-theft reliability and adaptability of the lock through the design of a blade lock core assembly and an adjustable lock tooth assembly and the combination of the electric control structure and the mechanical structure.
[0015] When the key is inserted and the lock disk is driven to move to the end position, the lock disk pushes the limit block to rotate to a preset angle and fits the lock tooth rod, so that the grooves on all the lock disks are aligned, forming an axial channel adapted to the limit rod. At this time, the limit rod slides into the aligned groove, releasing the rotation restriction on the lock cylinder and achieving unlocking. With the groove of the outermost lock disk as a reference, the grooves of the remaining lock disks are deflected at different angles within the range of 0-35° in sequence, so that the grooves of each lock disk are "spirally misaligned" in the initial state, making it difficult for external tools to synchronize all the grooves by a single prying, thereby effectively resisting illegal opening methods. The twelve adjustment grooves equidistantly arranged on the lock disk provide multi-speed limit support for the adjustable lock tooth assembly. The present invention uses the top block and groove linkage of the lock disk, differentiated deflection grooves to enhance anti-cracking capabilities, and multi-speed adjustment grooves to improve adaptability. The three work together with the snap-on logic of the limit rod and the electronically controlled limit of the adjustable lock tooth assembly to provide all-round protection for door lock safety in different scenarios. 3. The present invention adopts a keyhole structure design in the middle of the twelve lock disks. The keyholes of the twelve lock disks together form a hole structure with a rectangular cross section that gradually shrinks from the outside to the inside. The rectangular cross section ensures that the key can stably fit the hole wall after being inserted, avoiding slipping during rotation, ensuring the precise contact between the key teeth and the top block of the lock disk, and providing a stable transmission basis for the top block to move from the initial position to the terminal position; the design of gradually shrinking from the outside to the inside plays a dual role. On the one hand, it guides the key to quickly align and insert, reduces the jamming during insertion and removal, and improves the ease of use; on the other hand, it makes the keyhole structure more special, reduces the number of illegal tools compatible with the lock, and reduces the risk of technical opening. The present invention forms a synergy between the keyhole structure and the groove and top block of the lock disk, avoiding the problem of uneven force on the top block and difficulty in synchronous movement caused by the shaking of the key, and improves the unlocking stability and anti-theft reliability.
[0016] 4. The present invention adopts the coordinated design of the curved rod, contact plate and piezoelectric sensor at the end of the locking rod. The curved rod relies on its own elastic characteristics to enable the contact plate at the end to fit closely with the surface of the lock disk. When the locking rod slides along the guide groove to the limit position, the contact plate forms a flexible contact with the positioning groove or contact surface at the edge of the lock disk through the micro-elastic deformation of the curved rod, thereby avoiding the wear of components caused by rigid collision. The piezoelectric sensor sandwiched between the contact plate and the locking rod can sense the pressure signal transmitted by the contact plate in real time: when normally locked, the contact plate is under stable force, and the piezoelectric sensor is used to sense the pressure signal transmitted by the contact plate in real time. The sensor outputs a constant electrical signal to provide feedback that the locking rod is precisely in place, ensuring effective positioning. If the servo motor drive deviates during unlocking, causing the locking rod to be incompletely engaged or over-pressurized, the sensor will detect the pressure anomaly and promptly trigger motor fine-tuning to avoid damage to the lock disk or locking rod. In anti-theft scenarios, if the lock cylinder is pried open by force from the outside, the lock disk will be abnormally displaced, resulting in a sudden change in the force on the contact plate. The piezoelectric sensor can quickly identify this abnormal signal, which can, on the one hand, link the anti-pry mechanism inside the lock body to strengthen the locking, and on the other hand, trigger the alarm device. The present invention enhances the dynamic protection capability of the lock through the coordinated design of the curved rod at the end of the locking rod, the contact plate, and the piezoelectric sensor, integrating the locking and monitoring functions.
[0017] 5. The present invention adopts the design of the anti-theft system. When the system is initially locked, the blade lock core assembly is staggered by the lock plate groove, the limit rod is buckled, and the adjustable lock tooth assembly is locked; after the smart key passes the encryption verification, the servo motor drives the lock tooth rod to accurately position, the smart key is physically inserted into the lock hole, and the key slots of different depths drive the lock plate to rotate, the lock plate top block synchronously fits the lock tooth rod contact plate, and multiple piezoelectric sensors receive pressure signals at the same time; at this time, the grooves of all lock plates accommodating the limit rods are aligned, and the limit rods slide into the grooves, releasing the rotation restriction of the blade lock core, and "electronic verification" is required. The triple conditions of "proof + physical drive + multi-sensor collaboration" ensure the uniqueness of unlocking; if a lock picking tool is inserted, the tool can only contact a small number of lock disks and trigger individual / repeated signals from some piezoelectric sensors; the processing unit quickly identifies the lock picking through "signal quantity difference + trigger frequency" and immediately executes "locking the lock rod + high-decibel alarm + mobile phone APP encrypted alarm + event recording + cutting off the key communication link"; after the blade lock cylinder is subsequently unrestricted, the key is turned to drive the lock tongue to open, and the system feedback is successful unlocking; if there is an abnormality, the lock rod is driven to reset and lock. The present invention forms a double security and anti-theft effect through the design of the anti-theft system and the coordination of physical and intelligent methods, which not only ensures the reliability of normal unlocking, but also blocks the risk of lock picking in real time. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the lock body of the present invention.
[0019] Figure 2 This is a schematic structural diagram of the blade lock core assembly inside the lock body of the present invention before rotation.
[0020] Figure 3 This is a schematic diagram of the structure of the blade lock core assembly inside the lock body of the present invention after rotation.
[0021] Figure 4 It is a front view schematic diagram of the blade lock core assembly and the adjustable lock tooth assembly of the present invention before the lock core rotates.
[0022] Figure 5 It is a front view schematic diagram of the blade lock core assembly and the adjustable lock tooth assembly after the lock core is rotated.
[0023] Figure 6 It is a rear view structural schematic diagram of the blade lock core assembly and the adjustable lock tooth assembly before the lock core rotates.
[0024] Figure 7 It is a schematic diagram of the rear view structure of the blade lock core assembly and the adjustable lock tooth assembly after the lock core is rotated.
[0025] Figure 8 This is a schematic structural diagram of the lock disk and lock core of the present invention before rotation.
[0026] Figure 9 It is a schematic structural diagram of the lock disk and lock core of the present invention after rotation.
[0027] Figure 10 This is a schematic diagram of the structure of the servo motor structure of the present invention before the lock cylinder rotates.
[0028] Figure 11 This is a schematic diagram of the structure of the servo motor structure lock cylinder after rotation of the present invention.
[0029] Figure 12 This is a schematic diagram of the structure of the lock disk housing before the lock cylinder rotates.
[0030] Figure 13 It is a schematic diagram of the structure of the lock disk housing structure after the lock core rotates.
[0031] Figure 14 Schematic diagram of the structure of the smart key of the present invention.
[0032] Description of the numbers in the figure: 1. Lock body; 2. Blade lock core assembly; 3. Adjustable lock teeth assembly; 4. Limit rod; 5. Smart key; 201, lock disk; 202, lock disk housing; 203, clearance disk; 2011, top block; 2012, groove; 2013, lock hole; 2014, adjustment groove; 2021, movable slot; 2022, through slot; 2023, slide slot; 2024, shift block; 301. Servo motor; 302. First gear; 303. Second gear; 304. Rack; 305. Locking rod; 306. Bending rod; 307. Contact plate; 308. Piezoelectric sensor. DETAILED DESCRIPTION
[0033] Example 1, as Figures 1 to 14 As shown, the present invention relates to an anti-theft door lock, comprising a lock body 1, a blade lock core assembly 2 and an adjustable lock tooth assembly 3; the blade lock core assembly 2 is arranged in the lock body 1, and the blade lock core assembly 2 comprises a lock disk 201, a lock disk shell 202 and a gap disk 203, twelve lock disks 201 and eleven gap disks 203 are respectively arranged in parallel in the lock disk shell 202, and the gap disk 203 is tightly fitted between two adjacent lock disks 201, and a limiting rod 4 is provided on one side of the twelve lock disks 201, the lock disk 201 is used to limit the movement of the limiting rod 4, and the limiting rod 4 is used to limit the rotation of the blade lock core assembly 2; the adjustable lock tooth assembly 3 comprises Servo motor 301, first gear 302, second gear 303, rack 304, and locking rod 305; twelve servo motors 301 are installed in the lock body 1, twelve first gears 302 are respectively installed at the output ends of the twelve servo motors 301, twelve second gears 303 are respectively meshed and connected to the twelve first gears 302, twelve racks 304 are meshed and connected to the twelve second gears 303, twelve locking rods 305 are respectively installed on the twelve racks 304, and the locking rods 305 are slidably connected to the lock disk housing 202, and the locking rods 305 are used to limit the rotation position of the lock disk 201.
[0034] A movable groove 2021 is provided on one side of the lock disk housing 202 , in which a top block 2011 is movably installed. A through groove 2022 is provided on the other side of the lock disk housing 202 , in which a limiting rod 4 is movably installed.
[0035] A sliding groove 2023 is provided at the top of the movable groove 2021 , and a locking rod 305 is slidably connected in the sliding groove 2023 . A shift block 2024 is installed at the rear of the lock disk housing 202 .
[0036] A smart key 5 is inserted into the lock hole 2013. The smart key 5 is provided with forty-eight key slots of different depths. When the smart key 5 is rotated 90°, the smart key 5 and the key slots are used to rotate the twelve lock disks 201 to different angles, thereby rotating to the respective end positions of the twelve lock disks 201.
[0037] The present invention adopts the design of the blade lock core assembly 2 and the adjustable lock tooth assembly 3. The adjustable lock tooth assembly 3 provides dynamic limit protection for the lock disk 201 through precise transmission driven by electronic control. The servo motor 301 serves as a power source and can output stable torque according to the key recognition signal or preset instruction, driving the first gear 302 at the output end to rotate; the first gear 302 and the second gear 303 are meshed and transmitted to transmit power to the rack 304. Since the rack 304 is rigidly connected to the lock tooth rod 305, and the lock tooth rod 305 is slidably engaged in the guide groove of the lock disk shell 202, the linear movement of the rack 304 will drive the lock tooth rod 305 to slide precisely along the guide groove; when the lock tooth rod 305 is in the initial position, the rotation angle of the lock disk 201 is limited; when unlocking or adjustment is required, the servo motor 301 drives the lock tooth rod 305 to move to a preset distance, and cooperates with the key to drive the lock disk 201 to rotate to achieve unlocking. The present invention improves the anti-theft reliability and usage adaptability of the lock through the design of the blade lock core assembly 2 and the adjustable lock tooth assembly 3 and the combination of the electric control structure and the mechanical structure.
[0038] Specifically, such as Figures 4 to 9 As shown, the lock disk 201 involved in the present invention is equipped with a top block 2011, and a groove 2012 is provided on the lock disk 201; when the twelve top blocks 2011 are in the initial position, the groove 2012 at the limit rod 4 is in a staggered state, and the limit rod 4 is in a snap position; when the twelve top blocks 2011 are in the end position, the groove 2012 at the limit rod 4 is in an aligned state, and the limit rod 4 slides into the groove 2012.
[0039] The grooves 2012 on the twelve locking disks 201 are deflected by 0-35 degrees relative to the outermost groove 2012 , and the locking disk 201 is further provided with twelve adjustment grooves 2014 equidistantly located on one side of the groove 2012 .
[0040] The present invention adopts the design of the top block 2011, the groove 2012 and the adjustment groove 2014 on the lock disk 201. When the top blocks 2011 of the twelve lock disks 201 are in the initial position, the grooves 2012 corresponding to the limit rods 4 on each lock disk 201 are staggered. The outer peripheral surface of the limit rod 4 is clamped by the convex part of the adjacent lock disk 201, directly limiting the overall rotation of the blade lock core assembly 2, forming a reliable locked state; and when the key is inserted and drives the lock disk 201 to move to the end position, the lock disk 201 pushes the limit block to rotate to a preset angle and fits with the lock tooth rod 305, so that the grooves 2012 on all the lock disks 201 are aligned, forming a An axial channel adapted to the limit rod 4, at this time the limit rod 4 slides into the aligned groove 2012, releasing the rotation restriction on the lock cylinder and achieving unlocking; taking the groove 2012 of the outermost lock disk 201 as the reference, the grooves 2012 of the remaining lock disks 201 are deflected at different angles within the range of 0-35° in turn, so that the grooves 2012 of each lock disk 201 are "spirally dislocated" in the initial state, and it is difficult for external tools to synchronize all the grooves 2012 with a single pry, effectively resisting illegal opening methods; the twelve adjustment grooves 2014 equidistantly opened on the lock disk 201 provide multi-speed limit support for the adjustable lock tooth assembly 3. The present invention links the top block 2011 and the groove 2012 of the lock disk 201, and the differentiated deflection groove 2012 enhances the anti-cracking ability, and the multi-speed adjustment groove 2014 improves the adaptability. The three work together with the snap-on logic of the limit rod 4 and the electric control limit of the adjustable lock tooth assembly 3 to provide all-round protection for door lock safety in different scenarios. It is worth noting that if Figures 4 to 14 As shown, the middle of the twelve lock disks 201 of the present invention are all provided with lock holes 2013, and the twelve lock holes 2013 form a hole structure with a rectangular cross section, and the cross section of the hole structure gradually decreases from the outside to the inside.
[0041] The present invention utilizes a keyhole 2013 structure in the middle of the twelve lock plates 201. The keyholes 2013 of the twelve lock plates 201 collectively form a rectangular cross-section that gradually tapers from outside to inside. The rectangular cross-section ensures that the key can stably fit the hole wall after insertion, preventing slippage during rotation. This ensures precise contact between the key teeth and the top block 2011 of the lock plate 201, providing a stable transmission foundation for the top block 2011 to move from an initial position to a final position. The tapering design from outside to inside serves a dual purpose: on the one hand, it guides the key for rapid alignment and insertion, reducing insertion and removal delays and improving ease of use; and on the other hand, it makes the keyhole 2013 structure more unique, reducing the number of illegal tools compatible with the lock and reducing the risk of technical unlocking. The present invention utilizes the keyhole 2013 structure to form a coordinated structure with the grooves 2012 and top block 2011 of the lock plate 201, thereby avoiding the problem of uneven force on the top block 2011 and difficulty in synchronous movement caused by key shaking, and improving unlocking stability and anti-theft reliability.
[0042] Further, such as Figures 4 to 13 As shown, a curved rod 306 and a piezoelectric sensor 308 are installed at the end of the locking rod 305 of the present invention, a contact plate 307 is installed at the end of the curved rod 306, and the piezoelectric sensor 308 is arranged between the contact plate 307 and the locking rod 305.
[0043] The present invention adopts the coordinated design of the curved rod 306, the contact plate 307 and the piezoelectric sensor 308 at the end of the locking rod 305. The curved rod 306, by virtue of its own elastic properties, enables the contact plate 307 at the end to fit tightly against the surface of the lock disk 201. When the locking rod 305 slides along the guide groove to the limit position, the contact plate 307 forms a flexible contact with the positioning groove or contact surface at the edge of the lock disk 201 through the micro-elastic deformation of the curved rod 306, thereby avoiding wear of components caused by rigid collision. The piezoelectric sensor 308 sandwiched between the contact plate 307 and the locking rod 305 can sense the pressure signal transmitted by the contact plate 307 in real time: when the locking rod 305 is normally locked, the contact plate 307 is in a state of being locked. 07 Stable force, the piezoelectric sensor 308 outputs a constant electrical signal, feedback that the lock rod 305 is precisely in place, ensuring effective limit. If the servo motor 301 drives incorrectly during unlocking, causing the lock rod 305 to not be fully engaged or over-pressurized, the sensor will detect the pressure anomaly and promptly trigger the motor to fine-tune to avoid damage to the lock disk 201 or the lock rod 305. In anti-theft scenarios, if the lock core is pried open by force from outside, the lock disk 201 will produce abnormal displacement, resulting in a sudden change in the force on the contact plate 307. The piezoelectric sensor 308 can quickly identify this abnormal signal, on the one hand, linking the anti-pry mechanism inside the lock body 1 to strengthen the locking, and on the other hand, triggering the alarm device. The present invention strengthens the dynamic protection capability of the lock through the coordinated design of the curved rod 306 at the end of the lock rod 305, the contact plate 307, and the piezoelectric sensor 308, integrating the locking and monitoring functions. Example 2, as Figures 1 to 14 As shown, the present invention relates to an anti-theft system, which includes the following steps when used: S1. System initial state and smart key 5 triggering: The anti-theft door lock is in the initial locked state. In the blade lock cylinder assembly 2, the grooves 2012 on the lock disk 201 are in an interlaced state, and the limit rod 4 is locked in the buckle position within the through groove 2022, restricting the rotation of the blade lock cylinder assembly 2. The lock rod 305 of the adjustable lock thread assembly 3 is in the initial locked position. When the smart key 5 with a built-in encryption chip approaches the door lock sensing area, the door lock information receiving module is activated, establishing a two-way encrypted communication link with the smart key 5, triggering the system to start. S2. Information verification and instruction generation of the smart key 5: The smart key 5 transmits a data packet containing the "unique authorization ID, dynamic encryption key, and adjustment parameters of the lock tooth rod 305" to the door lock processing unit. The processing unit decrypts and verifies the information using a preset algorithm. If the ID is not in the authorization list or the key matching fails, the system triggers the buzzer module to sound an alarm and simultaneously records the time and number of abnormal attempts. The adjustable lock tooth assembly 3 keeps the lock tooth rod 305 in the initial position and locked. If the verification is successful, the processing unit generates a drive instruction for the "forward and reverse rotation angles and speeds of the servo motor 301" according to the adaptation parameters to control the operation of the servo motor 301. S3, driving the adjustable locking thread assembly 3 and positioning the locking thread rod 305: the servo motor 301 matching the number of the lock disk 201 is started, and the output end of the servo motor 301 drives the first gear 302 to rotate, which drives the second gear 303 to rotate through meshing transmission, thereby causing the meshing rack 304 to make a linear motion along the slide groove 2023 of the lock disk housing 202. Since the locking thread rod 305 is fixed on the rack 304, it slides synchronously with the rack 304 until the locking thread rod 305 moves a preset distance, completing the positioning of the locking thread rod 305; S4, smart key 5 physical drive and lock picking behavior detection; S401, normal unlocking operation: insert the physical part of the smart key 5 into the lock hole 2013. During the insertion process of the smart key 5, key slots of different depths contact the inner circle of the lock disk 201. After ensuring that the smart key 5 is fully inserted, the user rotates the smart key 5 90°. The smart key 5 applies a rotational torque to the lock disk 201 through the key slot, driving several lock disks 201 to rotate at different angles. When the lock disks 201 rotate to their respective end positions, the top block 2011 abuts against the contact plate 307 of the lock tooth rod 305. Multiple piezoelectric sensors 308 simultaneously receive weak pressure signals, and the processing unit determines it as "normal operation". At this time, the grooves 2012 for accommodating the limit rods 4 on all the lock disks 201 are aligned along the axis of the through slot 2022 of the lock disk housing 202. The limit rod 4 slides into the aligned groove 2012 along the through slot 2022, releasing the restriction on the rotation of the blade lock core assembly 2; S402, Lock picking detection and response: If a lock picking tool is inserted into the keyhole 2013, the tool can only contact one or several lock disks 201 and push the contact plates 307 of the corresponding locking rods 305, causing some piezoelectric sensors 308 to generate pressure signals independently. The processing unit monitors the sensor signals in real time: if the same piezoelectric sensor 308 generates signals multiple times within a preset time, it is immediately determined to be a "lock picking behavior." The processing unit synchronously performs the following operations: controlling all servo motors 301 to de-energize and brake, locking the locking rods 305; triggering the buzzer module to sound a high-decibel alarm and sending an encrypted alarm message to the user's preset mobile phone app; recording the lock picking event to local storage, and simultaneously disconnecting the communication link of the smart key 5 to prohibit subsequent unauthorized triggering; S5. Double lock unlocking completion and status feedback: After the blade lock core assembly 2 releases the rotation restriction, continue to rotate the smart key 5, driving the dial block 2024 at the rear of the lock disk housing 202 to rotate. The dial block 2024 drives the lock tongue retracting mechanism inside the door lock to open the door lock. At the same time, the processing unit detects the rotation signal of the dial block 2024, confirms that the double lock has been unlocked, and feeds back an encrypted signal of "unlock successful" to the smart key 5, and updates the system status to "opened"; if an abnormality occurs during the unlocking process, the system immediately triggers the servo motor 301 to reverse, driving the lock tooth rod 305 to reset, re-entering the locked state, and issuing an alarm prompt.
[0044] The present invention adopts the design of the anti-theft system. When the system is initially locked, the blade lock core assembly 2 is staggered by the groove 2012 of the lock plate 201, the limit rod 4 is locked, and the adjustable lock tooth assembly 3 is locked; after the smart key 5 passes the encryption verification, the servo motor 301 drives the lock tooth rod 305 to accurately position, the smart key 5 is physically inserted into the lock hole 2013, and the key slots of different depths drive the lock plate 201 to rotate, the top block 2011 of the lock plate 201 synchronously fits the lock tooth rod 305 contact plate 307, and multiple piezoelectric sensors 308 receive pressure signals at the same time; at this time, the grooves 2012 of all the lock plates 201 accommodating the limit rods 4 are aligned, and the limit rods 4 slide into the grooves 2 012. To remove the rotation restriction on the blade lock cylinder, the triple conditions of "electronic verification + physical drive + multi-sensor coordination" are required to ensure the uniqueness of the unlocking. If a prying tool is inserted, the tool can only contact a small number of lock disks 201 and trigger some piezoelectric sensors 308 to send individual / repeated signals. The processing unit quickly identifies the prying attempt through "signal quantity difference + trigger frequency" and immediately executes "locking the lock rod 305 + high-decibel alarm + mobile phone APP encrypted alarm + event recording + cutting off the key communication link." After the blade lock cylinder is subsequently released from the restriction, the key is turned to drive the lock tongue to open, and the system feedback indicates successful unlocking. If an abnormality occurs, the lock rod 305 is driven to reset the lock. The present invention, through the design of the anti-theft system, forms a dual security and anti-theft effect through the coordination of physical and intelligent methods, which not only ensures the reliability of normal unlocking, but also blocks the risk of prying in real time.
[0045] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.
Claims
1. An anti-theft door lock, characterized in that: It comprises a lock body (1), a blade lock core assembly (2) and an adjustable lock tooth assembly (3); The blade lock core assembly (2) is arranged in the lock body (1), and the blade lock core assembly (2) includes a lock disk (201), a lock disk shell (202) and a gap disk (203), a plurality of the lock disks (201) and a plurality of the gap disks (203) are respectively arranged in parallel in the lock disk shell (202), and the gap disk (203) is tightly fitted between two adjacent lock disks (201), and a limiting rod (4) is provided on one side of the plurality of lock disks (201), the lock disk (201) is used to limit the movement of the limiting rod (4), and the limiting rod (4) is used to limit the rotation of the blade lock core assembly (2); The adjustable locking tooth assembly (3) comprises a servo motor (301), a first gear (302), a second gear (303), a rack (304), and a locking tooth rod (305); a plurality of the servo motors (301) are installed in the lock body (1), a plurality of the first gears (302) are respectively installed at the output ends of a plurality of the servo motors (301), a plurality of the second gears (303) are respectively meshed and connected to a plurality of the first gears (302), a plurality of the racks (304) are meshed and connected to a plurality of the second gears (303), a plurality of the locking tooth rods (305) are respectively installed on a plurality of the racks (304), and the locking tooth rods (305) are slidably connected to the lock disk housing (202), and the locking tooth rods (305) are used to limit the rotation position of the lock disk (201).
2. The anti-theft door lock according to claim 1, characterized in that: A top block (2011) is mounted on the lock disk (201), and a groove (2012) is provided on the lock disk (201); when a plurality of the top blocks (2011) are located at an initial position, the grooves (2012) at the limiting rod (4) are in a staggered state, and the limiting rod (4) is in a snap-fit position; when a plurality of the top blocks (2011) are located at an end position, the grooves (2012) at the limiting rod (4) are in an aligned state, and the limiting rod (4) slides into the grooves (2012).
3. The anti-theft door lock according to claim 2, characterized in that: When the top blocks (2011) are aligned, the grooves (2012) on the locking disks (201) are deflected by 0-35 degrees relative to the outermost groove (2012), and the locking disk (201) is also provided with a plurality of adjustment grooves (2014) at equal intervals on one side of the groove (2012).
4. The anti-theft door lock according to claim 1, characterized in that: A locking hole (2013) is provided in the middle of each of the locking disks (201), and the locking holes (2013) form a hole structure with a rectangular cross section, wherein the cross section of the hole structure gradually decreases from the outside to the inside.
5. The anti-theft door lock according to claim 1, characterized in that: A movable groove (2021) is provided on one side of the lock disk housing (202), a top block (2011) is movably provided in the movable groove (2021), and a through groove (2022) is provided on the other side of the lock disk housing (202), a limiting rod (4) is movably provided in the through groove (2022).
6. The anti-theft door lock according to claim 5, characterized in that: A sliding groove (2023) is provided at the top of the movable groove (2021), a locking rod (305) is slidably connected in the sliding groove (2023), and a shifting block (2024) is installed at the rear of the lock disk housing (202).
7. The anti-theft door lock according to claim 1, characterized in that: A curved rod (306) and a piezoelectric sensor (308) are installed at the end of the locking rod (305), a contact plate (307) is installed at the end of the curved rod (306), and the piezoelectric sensor (308) is arranged between the contact plate (307) and the locking rod (305).
8. The anti-theft door lock according to claim 4, characterized in that: A smart key (5) is inserted into the lock hole (213), and a plurality of key slots of different depths are provided on the smart key (5). When the smart key (5) is rotated 90°, the smart key (5) and the plurality of key slots are used to rotate the plurality of lock disks (201) to different angles, thereby rotating to respective end positions of the plurality of lock disks (201).
9. An anti-theft system, characterized in that: An anti-theft door lock applicable to any one of claims 1-8.
10. The anti-theft system according to claim 9, characterized in that: The anti-theft system comprises the following steps when in use: S1, system initial state and smart key (5) triggering: the anti-theft door lock is in the initial locking state. When the smart key (5) with a built-in encryption chip approaches the door lock sensing area, the door lock information receiving module is activated, triggering the system to start; S2, smart key (5) information verification and command generation: the smart key (5) transmits a data packet to the door lock processing unit, and the processing unit verifies the information. If the verification fails, the system triggers the buzzer module to alarm, and the adjustable lock tooth assembly (3) remains locked; if the verification passes, the processing unit controls the servo motor (301) to work; S3, driving the adjustable locking tooth assembly (3) and positioning the locking tooth rod (305): the servo motor (301) matching the number of the locking disk (201) is started, and the servo motor (301) drives the locking tooth rod (305) to move a preset distance through the transmission member to complete the positioning of the locking tooth rod (305); S4, smart key (5) physical drive and lock picking behavior detection; S401, normal unlocking operation: insert the smart key (5) into the lock hole (2013), key slots of different depths contact the inner ring of the lock disk (201), the smart key (5) applies a rotational torque to the lock disk (201) through the key slot, and when the plurality of lock disks (201) rotate to different angles to their respective end positions, the plurality of piezoelectric sensors (308) simultaneously receive weak pressure signals, and the processing unit determines that it is "normal operation", the groove (2012) is aligned along the through groove (2022) of the lock disk housing (202), and the limit rod (4) slides along the through groove (222) into the aligned groove (212), thereby releasing the restriction on the rotation of the blade lock core assembly (2); S402, lock picking behavior detection and response: If a lock picking tool is used to insert into the keyhole (2013), the tool can only contact a single or several lock disks (201) and push the contact plate (307) of the corresponding lock rod (305), causing some piezoelectric sensors (308) to generate pressure signals individually, and the processing unit monitors the sensor signal in real time. If the same piezoelectric sensor (308) generates signals multiple times within a preset time, it is immediately determined to be a "lock picking behavior"; the processing unit controls the locking of the lock rod (305); triggers the buzzer module to alarm, and sends an encrypted alarm message to the user's mobile phone APP; records the lock picking event to local storage, and simultaneously cuts off the communication link of the smart key (5) to prohibit subsequent unauthorized triggering; S5, double lock unlocking completion and status feedback: After the blade lock core assembly (2) releases the rotation restriction, the door lock opens and feeds back an encrypted signal of "unlocking successfully" to the smart key (5); if an abnormality occurs during the unlocking process, the system re-enters the locked state and issues an alarm prompt.