Power grid cabinet lock based on NFC passive lock technology and control method thereof

Abstract

The invention discloses a power grid cabinet lock based on the NFC passive lock technology and a control method of the power grid cabinet lock, and belongs to the technical field of intelligent locks.The power grid cabinet lock comprises a shell, an external threaded rod, an internal threaded pipe, an NFC passive lock fixedly arranged in the shell and a spring bolt assembly clamped to the bottom of the NFC passive lock, the two ends of the internal threaded pipe are rotationally connected to the inner side wall of the shell through bearings, and the external threaded rod is connected with the internal threaded pipe; a one-way transmission assembly and a clamping pin are sequentially and fixedly connected to the inner threaded pipe from left to right, a push rod is arranged above the one-way transmission assembly and fixedly connected with a spring bolt assembly, and the bottom of the spring bolt assembly is located in the rotating direction of the clamping pin. And the external threaded rod is matched with the internal threaded pipe. Threaded transmission of the external threaded rod and the internal threaded pipe is matched with linkage of the one-way transmission assembly and the spring bolt assembly, so that'door closing after locking 'is achieved; the NFC passive lock technology is adopted, a battery and a key do not need to be arranged, the management difficulty is reduced, and the field deployment requirement of power grid equipment is met; information management of the power grid cabinet is realized, and safety prevention and control are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent locks, and in particular to a power grid cabinet lock based on NFC passive lock technology and a control method thereof. Background Art

[0002] As the core infrastructure of the power system, the physical security of the power grid cabinet is highly dependent on the reliability of locks. The current mainstream lock technology has structural defects and intelligent shortcomings, which are specifically manifested in the following aspects: There is a "non-mutual interlocking" problem between the closed state of the device door and the closed state of the lock (including smart lock), that is, there is no necessary connection between the closing of the lock and the closing of the device door. Although some smart locks have a status query function, they still cannot completely avoid the situation of "locking but not closing the door".

[0003] For example, the invention patent with publication number CN103489240A and titled "New NFC Controlled Lock" discloses a new NFC controlled lock with dual recognition of NFC and fingerprint. It uses NFC technology for detection and recognition when unlocking, and achieves anti-theft effect by setting harsh unlocking conditions. However, the opening and closing of the lock is achieved by the motor and drive structure (gear set and screw rod) directly controlling the lock tongue. There is no linkage mechanism between the device door and the lock, and there is a fatal loophole of pseudo-locking state, which can easily cause security accidents such as illegal intrusion.

[0004] In addition, the mechanical padlocks and anti-mistake padlocks currently in common use are prone to rust and difficult to manage keys; electronic locks with built-in batteries have a series of maintenance problems caused by battery replacement and low outdoor temperatures; passive electronic locks that use contact power supply have easily damaged interfaces and are difficult to manage power supply keys; more importantly, the above locks lack information management capabilities and cannot meet the needs of smart grids, which is manifested in the following ways: the corresponding positions of locks and devices are unclear, and the corresponding devices cannot be found through quick addressing. There are security control pain points such as the inability to implement user login, unlocking authority (time, lock code) management, and operation track recording.

[0005] Based on the above defects, a power grid cabinet lock based on NFC passive lock technology and a control method thereof are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a power grid cabinet lock based on NFC passive lock technology and a control method thereof to solve the problems in the background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides a power grid cabinet lock based on NFC passive lock technology, comprising a shell, an externally threaded rod, an internally threaded tube, an NFC passive lock fixedly arranged inside the shell, and a lock tongue assembly clamped at the bottom of the NFC passive lock, wherein both ends of the internally threaded tube are rotatably connected to the inner side wall of the shell through bearings, a one-way transmission assembly and a bayonet are fixedly connected to the internally threaded tube from left to right in sequence, a push rod is arranged above the one-way transmission assembly, the push rod is fixedly connected to the lock tongue assembly, and the bottom of the lock tongue assembly is located in the rotation direction of the bayonet; the externally threaded rod is adapted to the internally threaded tube.

[0008] Preferably, the lock tongue assembly includes an NFC passive lock lock tongue, a spring sheet and a control rod for limiting the rotation of the bayonet, the NFC passive lock lock tongue is clamped at the bottom of the NFC passive lock, a lock buckle is fixedly provided on the NFC passive lock lock tongue, one end of the spring sheet is clamped at the top of the lock buckle, and the other end of the spring sheet is fixedly connected to the housing; the top of the push rod and the top of the control rod are both fixedly connected to the lock buckle, and the bottom of the control rod is located in the rotation direction of the bayonet.

[0009] Preferably, the one-way transmission assembly comprises an inner edge ratchet and a pawl seat rotatably connected to the internal threaded tube, the pawl seat is provided with a one-way pawl, and the front end of the one-way pawl abuts against the inner edge ratchet.

[0010] Preferably, a cover plate and a cam are fixedly connected to both sides of the inner edge ratchet respectively, the cover plate and the cam are both rotatably connected to the internal threaded tube, and the cam is located below the push rod.

[0011] Preferably, an opening for NFC near-field communication is provided on the shell outside the NFC passive lock, a metal protective cover is provided outside the opening, and a handle is fixedly connected to the right side wall of the shell.

[0012] The present invention also provides a control method for the above-mentioned power grid cabinet lock based on NFC passive lock technology, comprising the following steps: S1. Install the external threaded rod on the cabinet body of the power grid cabinet, and install the remaining structures on the cabinet door of the power grid cabinet, so that the internal threaded pipe and the external threaded rod are in corresponding positions; S2. The cabinet doors are synchronously closed by closing the power cabinet locks; and the cabinet doors are synchronously opened by opening the power cabinet locks.

[0013] Preferably, in S2, the specific closing process of the power grid cabinet lock is: 1) Push the cabinet door to insert the external threaded rod into the internal threaded tube. The internal threaded tube rotates under the action of the thread and the bearing. At this time, the one-way pawl is locked with the inner edge ratchet, driving the cam to rotate synchronously. During the rotation, the cam pushes the push rod upward, causing the NFC passive lock tongue to move upward to close the NFC passive lock; 2) The upward movement of the NFC passive lock tongue will cause the control rod to move upward, so that the bottom of the control rod limits the rotation of the latch, thereby limiting the rotation of the internal threaded tube, and completing the synchronous closing of the cabinet door; 3) After the power grid cabinet lock is closed, the NFC function of the mobile terminal device can be used to read the status of the NFC passive lock, and the status data of the NFC passive lock is automatically uploaded to the client.

[0014] Preferably, in S2, the specific process of opening the power grid cabinet lock is: 1) Use a mobile terminal device to open the NFC passive lock, the NFC passive lock tongue pops out, the spring sheet further increases the force of the NFC passive lock tongue to pop down, the control rod moves down, the rotation limit of the latch is released, and the internal threaded tube resumes the free rotation state; 2) Pull the handle outward to gradually move the external threaded rod outward from the internal threaded tube, and the internal threaded tube rotates in the opposite direction. At this time, the pawl is in a free rotation state, the inner edge ratchet and cam will not rotate, and the cam will not contact the push rod; 3) When the external threaded rod is completely pulled out of the internal threaded tube, the power grid cabinet lock is opened and the cabinet door is opened synchronously.

[0015] Therefore, the present invention provides a power grid cabinet lock based on NFC passive lock technology and a control method thereof, which has the following beneficial effects: (1) Through the threaded meshing transmission of the external threaded rod and the internal threaded tube, combined with the linkage design of the one-way transmission component and the lock tongue component, a strong physical connection between the lock status and the cabinet door status is achieved. When the cabinet door is closed, the process of the external threaded rod screwing into the internal threaded tube will synchronously drive the cam mechanism to trigger the NFC passive lock lock tongue to close. At the same time, the control rod moves up to limit the rotation of the latch pin to form a mechanical interlock, completely eliminating the safety hazard of "locking but not closing the door".

[0016] (2) The NFC passive lock technology eliminates the need for batteries and abandons the traditional battery power supply solution, solving the problem of battery failure and regular replacement in low-temperature outdoor environments. At the same time, no keys are required, further reducing management difficulty and meeting the needs of field deployment of power grid equipment.

[0017] (3) The use of NFC passive lock technology realizes the rapid addressing and positioning of the power grid cabinet, remote authorization, user login, unlocking authority (time, lock code) management, and tracking and recording of the entire operation chain, which improves management efficiency and security control and realizes information management.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the internal structure of an embodiment of the present invention; Figure 2 is a schematic diagram of the external structure of an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a lock tongue assembly according to an embodiment of the present invention; Figure 4 An exploded view of a one-way transmission assembly according to an embodiment of the present invention; Reference numerals: 1. Shell; 2. Externally threaded rod; 3. Internally threaded tube; 4. NFC passive lock; 5. Lock tongue assembly; 51. NFC passive lock lock tongue; 52. Lock buckle; 53. Spring leaf; 54. Control rod; 6. Bearing; 7. One-way transmission assembly; 71. Inner edge ratchet; 72. Ratchet seat; 73. One-way ratchet; 74. Cover plate; 75. Cam; 8. Pin; 9. Push rod; 10. Metal protective cover; 11. Handle. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0022] Example like Figure 1-Figure 2 As shown, a power grid cabinet lock based on NFC passive lock technology provided by the present invention includes a shell 1, an externally threaded rod 2, an internally threaded tube 3, an NFC passive lock 4 installed inside the shell 1, and a lock tongue assembly 5 clamped at the bottom of the NFC passive lock 4. Both ends of the internally threaded tube 3 are rotatably connected to the inner wall of the shell 1 through bearings 6. A one-way transmission assembly 7 and a bayonet 8 are welded or pinned on the internally threaded tube 3 from left to right in sequence. The bayonet 8 is used to limit the rotation of the internally threaded tube 3 after the power grid cabinet lock is closed; a push rod 9 is arranged above the one-way transmission assembly 7, and the push rod 9 is welded on the lock tongue assembly 5, and the bottom of the lock tongue assembly 5 is located in the rotation direction of the bayonet 8; the externally threaded rod 2 is adapted to the internally threaded tube 3, and the externally threaded rod 2 is equivalent to the lock tongue of the entire power grid cabinet lock, and controls the switching state of the power grid cabinet lock.

[0023] like Figure 3As shown, the lock tongue assembly 5 includes an NFC passive lock lock tongue 51, a spring sheet 53 and a control rod 54 for limiting the rotation of the bayonet 8. The NFC passive lock lock tongue 51 is clamped at the bottom of the NFC passive lock 4. A lock buckle 52 is welded or fixed with a top screw on the NFC passive lock lock tongue 51. One end of the spring sheet 53 is clamped at the top of the lock buckle 52, and the other end of the spring sheet 53 is welded or bolted to the housing 1; the top of the push rod 9 and the top of the control rod 54 are both welded to the lock buckle 52, and the bottom of the control rod 54 is located in the rotation direction of the bayonet 8.

[0024] The NFC passive lock 4 is installed inside the shell 1, and its opening and closing are completed inside the shell 1. A spring sheet 53 is arranged between the NFC passive lock tongue 51 and the NFC passive lock 4. The spring sheet 53 can give the NFC passive lock tongue 51 a downward spring force to ensure that the NFC passive lock tongue 51 can be smoothly bounced open when unlocking, which effectively solves the problem of low power consumption and limited convertible unlocking torque of the NFC passive lock 4 caused by power supply from the mobile phone.

[0025] When locking, the cam 75 rotates to move the push rod 9 upward, and the upward movement of the push rod 9 can synchronously complete the closing of the NFC passive lock 4 and the closing of the cabinet door (the rotation of the bayonet 8 is limited by the control rod 54, so that the internal threaded tube 3 and the external threaded rod 2 are kept in a fastened connection state, thereby achieving the locking of the cabinet body connected to the external threaded rod 2 and the cabinet door indirectly connected to the internal threaded tube 3); when unlocking, the downward movement of the NFC passive lock tongue 51 can release the rotation limit of the bayonet 8, and the power grid cabinet lock can be opened by pulling the handle 11.

[0026] like Figure 4 As shown, the one-way transmission assembly 7 includes an inner edge ratchet 71 and a pawl seat 72 rotatably connected to the internal threaded tube 3, a one-way pawl 73 is provided on the pawl seat 72, the front end of the one-way pawl 73 abuts against the inner edge ratchet 71, and both sides of the inner edge ratchet 71 are bolted with a cover plate 74 and a cam 75, both of which are rotatably connected to the internal threaded tube 3, and the cam 75 is located below the push rod 9.

[0027] An opening (not shown) for NFC short-range communication is provided on the shell 1 located outside the NFC passive lock 4, and a metal protective cover 10 is provided outside the opening. The method of exposing only a portion of the NFC passive lock 4 and protecting it with the metal protective cover 10 effectively solves the problem that the shell of the NFC passive lock 4 is made of non-metallic material and has poor resistance to external force destructiveness, and provides basic physical protection for the long-term use of the NFC passive lock 4 outdoors (in the wild).

[0028] A handle 11 is fixedly connected to the right side wall of the housing 1 to facilitate operation by the staff.

[0029] The control method of the power grid cabinet lock based on the NFC passive lock 4 technology comprises the following steps: S1. Install the external threaded rod 2 on a fixed cabinet (or an outdoor fixed fence door frame, box, or other outdoor equipment in the railway, power grid, mobile communication, and other industries), and install the remaining structures on a movable cabinet door (box cover, movable fence door, etc.), so that the internal threaded pipe 3 and the external threaded rod 2 are in corresponding positions; S2. The cabinet doors are synchronously closed by closing the power cabinet locks; and the cabinet doors are synchronously opened by opening the power cabinet locks.

[0030] Among them, the specific closing process of the power grid cabinet lock is: 1) Push the cabinet door to insert the external threaded rod 2 into the internal threaded tube 3. The internal threaded tube 3 rotates under the action of the thread and the bearing 6. At this time, the one-way pawl 73 is locked with the inner edge ratchet 71, driving the cam 75 to rotate synchronously. During the rotation process, the cam 75 pushes the push rod 9 upward, so that the NFC passive lock tongue 51 moves upward to close the NFC passive lock 4; 2) The upward movement of the NFC passive lock tongue 51 will cause the control rod 54 to move upward, so that the bottom of the control rod 54 restricts the rotation of the latch 8, thereby restricting the rotation of the internal threaded tube 3, and completing the synchronous closing of the cabinet door; 3) After the power grid cabinet lock is closed, the NFC function of the mobile phone can be used to read the status of the NFC passive lock 4, and the status data of the NFC passive lock 4 is automatically uploaded to the client; The status data of the NFC passive lock 4 includes lock code, geographic location, opening and closing status, etc. The status data is uploaded to the cloud platform in real time through the NFC communication protocol. A "one lock, one code" digital file can be built on the cloud platform to achieve rapid addressing and positioning of the power grid cabinet, multi-level authority management (including remote authorization, user login, unlocking time management, lock code management, etc.), tracking records of the entire operation chain, etc., thereby improving management efficiency.

[0031] The specific process of opening the power grid cabinet lock is as follows: 1) Use a mobile phone to open the NFC passive lock 4, and the NFC passive lock tongue 51 pops up downward with the assistance of the spring sheet 53, driving the control rod 54 to move downward, releasing the rotation limit of the latch 8, and the internal threaded tube 3 resumes the free rotation state; 2) Pull the handle 11 outwards to gradually move the external threaded rod 2 outwards from the internal threaded tube 3, and the internal threaded tube 3 rotates in the opposite direction. At this time, the pawl is in a free rotation state, the inner edge ratchet 71 and the cam 75 will not rotate (remain stationary), and the cam 75 will not contact the push rod 9, that is, it will not affect the unlocking state of the NFC lock; 3) When the external threaded rod 2 is completely withdrawn from the internal threaded tube 3, the power grid cabinet lock is opened, and the cabinet door is opened synchronously.

[0032] In addition, the power grid cabinet lock based on NFC passive lock technology provided by the present invention can also be used to transform the lock of the original outdoor equipment to improve the intelligent management level of the power grid equipment, such as fixing the external threaded rod on the lock buckle of the original lock, and realizing synchronous control of the lock and the cabinet door by inserting the shell (the rest of the structure); or installing the external threaded rod on the original cabinet door, and the rest of the structure on the original lock cover, and realizing linkage control by closing the lock cover, etc.

[0033] Therefore, the present invention provides a power grid cabinet lock based on NFC passive lock technology and its control method, which realizes a strong physical association between the lock state and the cabinet door state through the threaded meshing transmission of the external threaded rod and the internal threaded tube, in conjunction with the linkage design of the one-way transmission component and the lock tongue component. When the cabinet door is closed, the process of the external threaded rod screwing into the internal threaded tube will synchronously drive the cam mechanism to trigger the NFC passive lock tongue to close, and at the same time, the control rod moves up to limit the rotation of the latch pin to form a mechanical interlock, completely eliminating the safety hazard of "locking but not closing the door"; The NFC passive lock technology is adopted, which does not require batteries and abandons the traditional battery power supply solution, solving the problem of battery failure and regular replacement in outdoor low-temperature environments. At the same time, no keys are required, which further reduces the difficulty of management and meets the needs of field deployment of power grid equipment. The use of NFC passive lock technology realizes rapid addressing and positioning of power grid cabinets, remote authorization, user login, unlocking authority (time, lock code) management, tracking and recording of the entire operation chain, etc., which improves management efficiency and security control and realizes information management.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A power grid cabinet lock based on NFC passive lock technology, characterized by: It includes a shell, an externally threaded rod, an internally threaded tube, an NFC passive lock fixedly arranged inside the shell, and a lock tongue assembly clamped on the bottom of the NFC passive lock, the two ends of the internally threaded tube are rotatably connected to the inner wall of the shell through bearings, the internally threaded tube is fixedly connected with a one-way transmission assembly and a bayonet in sequence from left to right, a push rod is arranged above the one-way transmission assembly, the push rod is fixedly connected to the lock tongue assembly, and the bottom of the lock tongue assembly is located in the rotation direction of the bayonet; the externally threaded rod is adapted to the internally threaded tube.

2. The power grid cabinet lock based on NFC passive lock technology according to claim 1, characterized in that: The lock tongue assembly comprises an NFC passive lock tongue, a spring sheet and a control rod for limiting the rotation of the bayonet, the NFC passive lock tongue is clamped at the bottom of the NFC passive lock, a lock buckle is fixedly provided on the NFC passive lock tongue, one end of the spring sheet is clamped at the top of the lock buckle, and the other end of the spring sheet is fixedly connected to the housing; the top of the push rod and the top of the control rod are both fixedly connected to the lock buckle, and the bottom of the control rod is located in the rotation direction of the bayonet.

3. The power grid cabinet lock based on NFC passive lock technology according to claim 1, characterized in that: The one-way transmission assembly comprises an inner edge ratchet and a pawl seat rotatably connected to the internal threaded tube, the pawl seat is provided with a one-way pawl, and the front end of the one-way pawl abuts against the inner edge ratchet.

4. The power grid cabinet lock based on NFC passive lock technology according to claim 3 is characterized by: A cover plate and a cam are respectively fixedly connected to both sides of the inner edge ratchet; the cover plate and the cam are both rotatably connected to the internal threaded tube; and the cam is located below the push rod.

5. The power grid cabinet lock based on NFC passive lock technology according to claim 1, characterized in that: An opening for NFC near-field communication is provided on the shell outside the NFC passive lock, a metal protective cover is provided outside the opening, and a handle is fixedly connected to the right side wall of the shell.

6. A control method for a power grid cabinet lock based on the NFC passive lock technology according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Install the external threaded rod on the cabinet body of the power grid cabinet, and install the remaining structures on the cabinet door of the power grid cabinet, so that the internal threaded pipe and the external threaded rod are in corresponding positions; S2. The cabinet doors are synchronously closed by closing the power cabinet locks; and the cabinet doors are synchronously opened by opening the power cabinet locks.

7. The control method of the power grid cabinet lock based on NFC passive lock technology according to claim 6 is characterized in that: In S2, the specific closing process of the power grid cabinet lock is: 1) Push the cabinet door to insert the external threaded rod into the internal threaded tube. The internal threaded tube rotates under the action of the thread and the bearing. At this time, the one-way pawl is locked with the inner edge ratchet, driving the cam to rotate synchronously. During the rotation, the cam pushes the push rod upward, causing the NFC passive lock tongue to move upward to close the NFC passive lock; 2) The upward movement of the NFC passive lock tongue will cause the control rod to move upward, so that the bottom of the control rod limits the rotation of the latch, thereby limiting the rotation of the internal threaded tube, and completing the synchronous closing of the cabinet door; 3) After the power grid cabinet lock is closed, the NFC function of the mobile terminal device can be used to read the status of the NFC passive lock, and the status data of the NFC passive lock is automatically uploaded to the client.

8. The control method of the power grid cabinet lock based on NFC passive lock technology according to claim 7 is characterized in that: In S2, the specific process of opening the power grid cabinet lock is: 1) Use a mobile terminal device to open the NFC passive lock, the NFC passive lock tongue pops out, the spring sheet further increases the force of the NFC passive lock tongue to pop down, the control rod moves down, the rotation limit of the latch is released, and the internal threaded tube resumes the free rotation state; 2) Pull the handle outward to gradually move the external threaded rod outward from the internal threaded tube, and the internal threaded tube rotates in the opposite direction. At this time, the pawl is in a free rotation state, the inner edge ratchet and cam will not rotate, and the cam will not contact the push rod; 3) When the external threaded rod is completely pulled out of the internal threaded tube, the power grid cabinet lock is opened and the cabinet door is opened synchronously.

Images