CN107680212B

CN107680212B - Authorization verification method for five-prevention intelligent lock of outdoor equipment of power distribution network

Info

Publication number: CN107680212B
Application number: CN201710874037.0A
Authority: CN
Inventors: 沈辉; 殷洪海; 岳素芳; 吴彬; 章立; 庄孟文
Original assignee: State Grid Corp of China SGCC; State Grid Jiangsu Electric Power Co Ltd; Changzhou Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Jiangsu Electric Power Co Ltd; Changzhou Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Priority date: 2017-09-25
Filing date: 2017-09-25
Publication date: 2020-03-17
Anticipated expiration: 2037-09-25
Also published as: CN107680212A

Abstract

The invention provides a five-prevention intelligent lock authorization verification method for outdoor equipment of a power distribution network, which is implemented by a management server, an intelligent lock and an electronic key, and comprises the steps of implanting an electronic key unlocking authorization and verification mechanism into the management server and the intelligent lock; the management server encodes and encrypts the related information to form an unlocking key; the electronic key obtains an unlocking key and unlocking authorization information; the electronic key is inserted into the intelligent lock and starts the intelligent lock, and unlocking information is sent to the intelligent lock; the intelligent lock calculates a verification key and compares the keys to verify so as to determine whether to perform unlocking action. According to the invention, the time information is introduced into the authorization and verification mechanism of the intelligent lock, so that the accuracy and timeliness of unlocking can be ensured, and the potential safety hazard and the defect of the intelligent lock in the prior art are effectively overcome.

Description

Authorization verification method for five-prevention intelligent lock of outdoor equipment of power distribution network

Technical Field

The invention relates to a protection lockset for power distribution network equipment, in particular to an authorization verification unlocking method for an intelligent lock for five-prevention of outdoor equipment of a power distribution network.

Background

In an electric power system, five-prevention generally means that five anti-misoperation functions are provided for high-voltage electrical equipment for ensuring personal safety, and is one of important measures for electric power safety. There are a large amount of outdoor equipment like looped netowrk cabinet in the distribution network, need set up the tool to lock and protect to prevent that irrelevant personnel from opening equipment and causing loss or accident. The used tool to lock of present outdoor distribution network equipment is mechanical padlock usually, because there is a large amount of equipment that adds the lock such as looped netowrk cabinet, district change in the same district for the padlock quantity is very big, if every lock all has a specific key that corresponds, the personnel of patrolling and examining need carry a large amount of keys when patrolling and examining outdoors, carry inconvenience on the one hand, on the other hand need turn over in a large amount of keys when the check out test set is unblanked to needs, waste time and energy, extravagant manpower. For solving this problem, the current way of power supply department's current is to adopt same key to unblank the padlock of outdoor equipment with the lock in same district, and it can effectively be solved and carry a large amount of key inconveniences, unblank and look for the problem that the key takes time, however, its new problem that brings is: firstly, potential misoperation hazards exist, for example, ring main units which are common on streets and roads are taken as examples, because the ring main units on the same street (road) are often more and the appearance and the color of the ring main units are basically the same, although the ring main units are provided with number plates, under the conditions that the number plates are not clear or fall off, inspection personnel are neglected and the like, the ring main unit A is required to be opened for maintenance or operation, but the ring main unit B is opened, the misoperation of the power distribution equipment can bring economic loss and adverse effects, and even personal injury accidents can be caused in serious cases; secondly, potential safety hazards such as theft (much copper) and artificial damage caused by illegal personnel are brought to outdoor equipment of the power distribution network due to the fact that keys are lost and copied.

In order to solve the problems existing in the two schemes, at present, a power supply department tries to set an intelligent lock unlocked by an electronic key on outdoor equipment of a power distribution network, the intelligent lock is generally provided with a power supply and is not connected with the internet, and before the intelligent lock is hung on the outdoor equipment of the power distribution network, a fixed unlocking authorization verification message is built in a processor of the intelligent lock; the intelligent lock can be opened by the electronic key with the unlocking authorization information of the intelligent lock; it has the problems that: firstly, when an electronic key carrying the authorization information of the intelligent lock is lost, the authorization information is leaked, so that potential safety hazards such as theft and artificial damage of illegal personnel are brought to outdoor equipment of the power distribution network; secondly, the unlocking authorization of the electronic key has no time limit, the corresponding intelligent lock can be opened by the electronic key after the unlocking authorization is obtained at any time, the defects are that on one hand, the management requirement of power supply management departments for the time-limited inspection of outdoor power supply equipment of the power distribution network cannot be met, and on the other hand, potential safety hazards such as missed inspection, outdated maintenance and the like also exist.

Disclosure of Invention

The purpose of the invention is: aiming at the problems in the prior art, the authorization verification method between the intelligent lock and the electronic key, which is implemented by the specially designed five-prevention intelligent lock and the electronic key of the outdoor equipment of the power distribution network, is provided, and by fusing the key elements including unlocking time information and the like in the authorization and verification processes, the safety and reliability of the intelligent lock can be greatly improved.

The technical scheme of the invention is as follows: the invention discloses an authorization verification method for a five-prevention intelligent lock of outdoor equipment of a power distribution network, which is implemented by a management server arranged in a power supply management department, an intelligent lock arranged on the outdoor equipment of the power distribution network and an electronic key carried by patrol personnel of the outdoor equipment of the power distribution network during use, and comprises the following steps:

① an electronic key unlocking authorization mechanism is implanted in the management server, and an electronic key authorization information verification mechanism matched with the management server electronic key unlocking authorization mechanism and 1 intelligent lock self number information with 8-bit codes are implanted in all the intelligent locks;

② when the electronic key needs to be unlocked, the management server gives 1 8-bit code to each of 4 information of the electronic key number, the number of the intelligent lock to be unlocked, the effective unlocking starting time and the effective unlocking ending time, and the 4 8-bit codes are combined in an end-to-end connection mode to form a character string;

③, the management server carries out encryption operation on the character string generated in step ② through a DES encryption algorithm through an electronic key unlocking authorization mechanism, and extracts characters from the character string to form an unlocking key;

④ the electronic key obtains the unlocking key and the unlocking authorization information including the electronic key number, the number of the intelligent lock to be unlocked, the effective unlocking start time and the effective unlocking termination time from the management server through local or remote wireless communication;

⑤ the electronic key is inserted into the intelligent lock, and the intelligent lock starts to work after the electronic key gets power;

⑥ the intelligent lock extracts its own number, combines the electronic key number sent by the electronic key, the effective unlocking start time and the effective unlocking end time, and carries out encryption operation by a DES encryption algorithm through a built-in electronic key authorization information verification mechanism to obtain a verification key;

⑦ the intelligent lock compares the verification key obtained by calculation with the unlocking key sent by the electronic key, if the 2 keys are different, the intelligent lock judges that the electronic key is not authorized, refuses to operate and can not unlock, if the 2 keys are the same, the intelligent lock extracts the current time information and further judges whether the current time is between the effective unlocking starting time and the effective unlocking ending time, if yes, the intelligent lock judges that the electronic key is authorized, the intelligent lock executes the unlocking operation and can unlock, and if not, the intelligent lock judges that the electronic key is not authorized, the intelligent lock refuses to operate and can not unlock.

The further scheme is as follows: the intelligent lock comprises a lock body, a lock rod spring arranged in the lock body, a lock rod elastically arranged on the lock body through the lock rod spring, a lock cylinder rotatably arranged in the lock body, a lock tongue which is arranged in the lock body, is fixedly connected with the lock cylinder and is movably matched with the lock rod, and an elastic limit pin which is arranged in the lock body and is used for preventing the lock cylinder from falling from the lock body; the method is characterized in that: the lock further comprises a pressing plate movably arranged in the lock body and used for controlling unlocking and locking, a first pressing plate spring, a second pressing plate spring and an electric control unlocking assembly, wherein the first pressing plate spring, the second pressing plate spring and the electric control unlocking assembly are arranged in the lock body and used for supporting the pressing plate from the upper side and the lower side respectively and are in movable fit with the pressing plate;

the electronic control unlocking assembly comprises a control panel, a solenoid, a push rod, a return spring and 2 input electrodes, wherein the control panel, the solenoid, the push rod and the return spring are arranged in the lock body, and the 2 input electrodes are arranged in the lock body and can be electrically connected with the outside; the reset spring is sleeved on the upper part of the ejector rod; the lower end of the reset spring is propped against the upper end of the solenoid; the middle lower part of the ejector rod is inserted in the solenoid;

the control panel is provided with a power supply conversion module, a signal decoupling analysis module, a main control MCU, a memory and an electromagnet driving module; wherein:

the power supply conversion module is used for providing a working power supply for the control panel 10-1 when power is supplied; the power supply conversion module is electrically connected with 2 input electrodes 10-2;

the signal decoupling analysis module is used for decoupling from a power supply sent by the electronic key, analyzing an unlocking key and authorization information sent by the electronic key and sending the unlocking key and the authorization information to the main control MCU; the signal decoupling analysis module is electrically connected with 2 input electrodes 10-2;

the main control MCU is used for judging whether the electronic key obtains unlocking authorization or not, and correspondingly controlling whether the nut tube 10-3 is electrified or not through the electromagnet driving module so as to correspondingly control whether the electronic key is unlocked or not; the main control MCU is in signal electrical connection with the signal decoupling analysis module;

the electromagnet driving module is used for correspondingly controlling the on-off of the power supply of the solenoid 10-3 according to the control signal of the main control MCU; the electromagnet driving module is in signal electric connection with the main control MCU;

the memory is used for information storage interaction with the master control MCU; the memory is electrically connected with the master control MCU in a bidirectional signal way;

the electronic key comprises a shell and a circuit device; the shell comprises a main body part and a plug part which are integrally connected; the inserting part is a cylindrical piece and is provided with a limiting protrusion;

the circuit device comprises an MCU (microprogrammed control Unit), a signal and power coupling module, a second memory, a communication module, an SIM (subscriber identity Module) card, a lithium battery, a battery management module and a power module which are arranged in a shell, a key switch, an LCD (liquid Crystal display) screen, a USB (Universal Serial bus) interface and a charging interface which are arranged on the main body part of the shell, and 2 output electrodes which are arranged on the peripheral wall of the plug part of the shell and are in a ring shape;

the signal and power coupling module, the second memory, the communication module, the battery management module, the key switch, the LCD display screen and the USB interface are respectively in signal electrical connection with the MCU; the output electrode is electrically connected with the signal and power coupling module; the SIM card is in signal electrical connection with the communication module; the battery management module is electrically connected with the lithium battery and the charging interface respectively; the power supply module is electrically connected with the battery management module; wherein:

the key switch is used for controlling the on-off of the power supply and the on-off of the remote wireless communication;

the LCD display screen is used for displaying information in real time;

the USB interface is used for being plugged with a management server of a power supply department during use, and information interaction including local acquisition of an unlocking key is realized;

the charging interface is used for being externally connected with a power supply when in use and charging the lithium battery through the battery management module;

the lithium battery is responsible for power supply;

the battery management module is controlled by the MCU and is responsible for battery charging management, battery output control and battery under-voltage protection;

the power supply module is used for obtaining power from the lithium battery through the battery management module and providing a working power supply for the circuit device after conversion;

the SIM card is used for storing an unlocking secret key and unlocking authorization information;

the communication module is used for realizing the remote information interaction between the electronic key and the management server and the information interaction between the SIM card and the MCU;

the second memory is used for carrying out information storage interaction with the MCU;

the signal and power coupling module is used for coupling the unlocking key information sent by the MCU with a power obtained from the power module and outputting the coupled power to the output electrode;

and the output electrode is used for outputting the power supply coupled with the unlocking key information.

In the step ④, the electronic key is plugged into the management server through its USB interface to obtain the unlocking key and the unlocking authorization information, or the electronic key is remotely and wirelessly communicated with the management server through its communication module on the inspection site to obtain the unlocking key and the unlocking authorization information.

The further scheme is that in the step ⑤, 2 output electrodes of an electronic key inserted into an electronic key hole of an intelligent lock core from a shell inserting part of the electronic key are electrically connected with 2 input electrodes of an electronic control unlocking component of the intelligent lock through 2 conductive balls of the lock core, the electronic key is unlocked through a key switch of the electronic key, the electronic control unlocking component of the intelligent lock obtains electricity from the electronic key to work, and the electronic control unlocking component analyzes an unlocking key, an electronic key number, effective unlocking starting time and effective unlocking ending time information sent by the electronic key from a power supply which is coupled with the unlocking key information and output by the electronic key through a signal decoupling analysis module on a control panel of the electronic control unlocking component and sends the information to a main control MCU of the intelligent lock for processing.

In the step ⑥, the intelligent lock extracts its own number from its main control MCU, and performs DES encryption algorithm to perform encryption operation by using the built-in electronic key authorization information verification mechanism in combination with the electronic key number, the effective unlocking start time, and the effective unlocking end time information sent by the signal decoupling analysis module to obtain the verification key.

The method further includes ⑦, comparing the verification key obtained by calculation with an unlocking key sent by an electronic key by a main control MCU of the intelligent lock, if 2 keys are different, judging that the electronic key is not authorized by the main control MCU, rejecting the action, if 2 keys are the same, extracting the current time by the main control MCU, further judging whether the current time is between the effective unlocking start time and the effective unlocking end time, if not, judging that the electronic key 100 is not authorized by the main control MCU, rejecting the action, if so, confirming that the electronic key is authorized by the main control MCU, supplying power to a solenoid through an electromagnet driving module by the main control MCU, enabling a push rod made of an electromagnet to overcome the elasticity of a reset spring to extend out downwards from the solenoid, pushing the press plate downwards into a lock cylinder by the push rod, and rotating the lock cylinder to unlock through the electronic key.

The further scheme is as follows: the lock body is provided with a lock cylinder mounting hole with an opening at the left end in the middle part in the vertical direction; the middle part of the lock body is provided with a pressing plate mounting groove which is recessed upwards, and the opening end of the pressing plate mounting groove is communicated with a lock cylinder mounting hole of the lock body; the upper part of the pressure plate mounting groove is provided with a solenoid mounting counter bore of which the lower port is communicated with the pressure plate mounting groove; the left upper part of the lock body is provided with a control panel accommodating cavity; the lock body is provided with 2 electrode through holes at the lower part of a control panel accommodating cavity of the lock body, the upper ports of the 2 electrode through holes are communicated with the control panel accommodating cavity, and the lower ports are communicated with a lock cylinder mounting hole of the lock body;

the lock core is rotatably arranged in the lock core mounting hole of the lock body; the first pressure plate spring is arranged in a pressure plate mounting groove of the lock body; the control panel of the electric control unlocking assembly is arranged in the control panel accommodating cavity of the lock body; 2 input electrodes are respectively arranged in 1 of 2 electrode through holes of the lock body; the ejector rod and the return spring are fixedly arranged in a solenoid installation counter bore of the lock body, the solenoid is fixedly arranged at the middle lower part of the solenoid installation counter bore of the lock body, and the lower part of the solenoid extends out of a pressing plate installation groove of the lock body.

The further scheme is as follows: a lock core limiting pin mounting counter bore is formed in the right side of the lock body on the pressure plate mounting groove; the right part of the lock core is provided with an annular anti-falling limiting groove which is inwards recessed from the periphery of the lock core, and the position of the anti-falling limiting groove is matched with the position of a lock core limiting pin mounting counter bore of the lock body;

the elastic limit pin consists of a pin rod and a spring; the pin rod and the spring are arranged in a lock core limiting pin mounting counter bore of the lock body; the upper end of the pin rod is propped against the spring; the lower end of the pin rod elastically extends into the anti-falling limiting groove of the lock cylinder.

The further scheme is as follows: lock rod mounting counter bores are respectively formed in the lower part and the upper part of the right side of the lock body; the lock rod is a rod piece which is integrally formed by an upper cross rod, a lower cross rod and a right arc-shaped rod and is U-shaped; the left part of the upper cross rod of the lock rod is provided with a locking notch; the middle part of the lower cross rod of the lock rod is provided with a limit notch; the lock rod spring is arranged at the left end in the lock rod mounting counter bore at the lower part of the lock body; the upper transverse rod of the lock rod is inserted into the lock rod mounting counter bore at the upper part of the right side of the lock body; the lower cross rod of the lock rod is inserted in the lock rod mounting counter bore at the lower part of the lock body, and the left end of the lower cross rod of the lock rod is elastically contacted with the lock rod spring;

the shape of the upper end of the lock tongue is matched with the locking notch of the upper transverse rod of the lock rod; the shape of the lower end of the lock tongue is matched with the limiting notch of the lower cross rod of the lock rod.

The further scheme is as follows: a round counter bore with an opening at the left end is arranged at the left side of the lock cylinder and is used as an electronic key hole; the right part of the electronic key hole of the lock core is provided with a rightward counter bore communicated with the electronic key hole and used as a mechanical key hole; the lock core is provided with an electronic key limiting groove with an opening end communicated with the electronic key hole on the right end wall body of the electronic key hole; the lock core is provided with 2 conductive beads on the upper wall body of an electronic key hole of the lock core, and the 2 conductive beads are correspondingly contacted with 2 input electrodes of the electronic control unlocking component during locking; the upper end of the middle part of the lock core is provided with a pressing plate abdicating groove which is recessed downwards, and the pressing plate abdicating groove is positioned below the pressing plate mounting groove of the lock body and is communicated with the pressing plate mounting groove of the lock body; the middle part of the lock core is provided with a plurality of movable blades, and the upper end of each blade is communicated with the pressure plate abdicating groove of the lock core;

the pressing plate is movably arranged in a space formed by butting the pressing plate mounting groove of the lock body and the pressing plate abdicating groove of the lock core, and the upper end surface of the pressing plate is abutted against the lower end of the first pressing plate spring; the second pressure plate spring is arranged in the pressure plate abdicating groove of the lock cylinder, and the upper end of the second pressure plate spring is abutted against the lower end surface of the pressure plate; the lower end of the second pressure plate spring is propped against the blade of the lock core

The first pressure plate spring and the second pressure plate spring are respectively provided with 2 springs.

The invention has the positive effects that: (1) the invention discloses a five-prevention intelligent lock authorization verification method for outdoor equipment of a power distribution network, which is characterized in that 4 pieces of information including an intelligent lock number, an electronic key number, effective unlocking starting time and effective unlocking ending time are coded and encrypted through a management server to form a key to send an electronic key, the intelligent lock receives the output information of the electronic key during unlocking, compares the key with a current time plan and verifies whether the current time is between the effective unlocking starting time and the effective unlocking ending time, correspondingly determines whether to unlock, an inspector can only open the intelligent lock on an inspection target within a specified time, and can not unlock if the inspector finds a wrong lock or not within the specified time; the method can better solve the problem of potential safety hazard caused by the loss of the authorization information and the leakage of the electronic key in the prior art; meanwhile, the lock is unlocked in a limited time through the electronic key, so that the management requirement of a power supply management department for polling outdoor power supply equipment of the power distribution network is met conveniently, and the potential safety hazard problems that the unlocking authorization of the electronic key in the prior art is indefinite, detection is easy to miss, and the like can be effectively solved. (2) According to the authentication method for the five-prevention intelligent lock of the outdoor equipment of the power distribution network, the unlocking time of the electronic key for authorizing unlocking is limited, and the electronic key becomes invalid after the electronic key is used, so that the potential safety hazards that the outdoor equipment of the power distribution network is stolen by illegal personnel and is artificially damaged due to the loss and the duplication of the key in the prior art can be effectively prevented. (3) The five-prevention intelligent lock for the outdoor equipment of the power distribution network, which is disclosed by the invention, has the advantages that through the structural design, when the five-prevention intelligent lock is used, a power supply department patrol personnel only needs to carry one authorized electronic key to unlock the corresponding intelligent locks in the intelligent locks used by all the outdoor equipment of the power distribution network in the same area, the authorization of the electronic key can be realized through on-site remote wireless communication, and therefore the technical problems that in the traditional method, when the patrol personnel carry a large number of keys in outdoor patrol, the carrying is inconvenient, and when the lock is unlocked, the corresponding key needs to be found in the large number of keys, so that the time and labor are wasted. (4) The five-prevention intelligent lock for the outdoor equipment of the power distribution network, which is applied to the method, has the advantages that the overall size is smaller through the reasonable structural design of the electric control unlocking assembly and the mechanical lock member in the lock body, the five-prevention intelligent lock can be effectively applied to locking of the existing outdoor equipment of the power distribution network, and the applicability is strong. (5) The power distribution network outdoor equipment five-prevention intelligent lock applying the method provided by the invention has the advantages that through the structural design of the electric control unlocking assembly, the electric control unlocking assembly is powered by a matched electronic key to work when in use, a battery is not required to be arranged in the electric control unlocking assembly, and the quantity of the five-prevention locks used by power distribution network outdoor equipment is large, so that the maintenance labor, time and hardware cost of a power supply management department on the five-prevention locks can be greatly saved by adopting the intelligent lock.

Drawings

FIG. 1 is a schematic diagram of an intelligent lock structure used in the method of the present invention;

FIG. 2 is a schematic diagram illustrating a positional relationship between a pressing plate and a lock body and a lock cylinder when the smart lock shown in FIG. 1 is locked;

FIG. 3 is a schematic structural diagram of the smart lock shown in FIG. 1 when the electronic key is provided to unlock the smart lock, wherein the electronic key is also shown in cooperation with the smart lock;

fig. 4 is a schematic diagram of a positional relationship between a top rod and a pressing plate of an electronic control unlocking assembly, a lock body and a lock cylinder of the intelligent lock shown in fig. 1 when the electronic key is used for unlocking the intelligent lock;

FIG. 5 is a schematic block diagram of a circuit configuration of an electrically controlled unlocking assembly of the smart lock shown in FIG. 1;

FIG. 6 is a schematic diagram of an external structure of an electronic key associated with the smart lock shown in FIG. 1;

FIG. 7 is a right side view of FIG. 6;

fig. 8 is a schematic block diagram of a circuit structure of an electronic key associated with the smart lock shown in fig. 1.

The reference numbers in the above figures are as follows:

the lock comprises a lock body 1 and a pressure plate mounting groove 1-1; the lock comprises a lock rod 2, a lock rod spring 3, a lock core 4, an electronic key hole 4-1, a mechanical key hole 4-2, an electronic key limiting groove 4-3, a conductive ball 4-4, a pressure plate abdicating groove 4-5, a blade 4-6 and a falling prevention limiting groove 4-7; the spring bolt comprises a spring bolt 5, an elastic limit pin 6, a pin rod 6-1 and a spring 6-2; the device comprises a pressure plate 7, a first pressure plate spring 8, a second pressure plate spring 9, an electronic control unlocking assembly 10, a control plate 10-1, an input electrode 10-2, a solenoid 10-3, a push rod 10-4 and a return spring 10-5.

The electronic key comprises an electronic key 100, a main body part 100-1, a plug part 100-2, a limiting protrusion 100-3, an output electrode 100-4, a key switch 100-5, an LCD display screen 100-6, a USB interface 100-7 and a charging interface 100-8.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

(examples)

In the present embodiment, in the description of the azimuth, the direction in which fig. 1 faces is taken as the front in the description, the direction opposite to the direction in which fig. 1 faces is taken as the rear in the description, and the up-down and left-right directions in fig. 1 are still the up-down and left-right directions in the description.

The authentication method for the five-prevention intelligent lock authorization of the outdoor equipment of the power distribution network is implemented by a management server arranged in a power supply management department, an intelligent lock arranged on the outdoor equipment of the power distribution network and an electronic key 100 carried by patrol personnel of the outdoor equipment of the power distribution network during use, and the authentication method specifically comprises the following steps:

③, the management server carries out encryption operation on the character string generated in step ② through a DES encryption algorithm through an electronic key unlocking authorization mechanism, and extracts characters in the character string to form 1 unlocking key;

⑥ the intelligent lock extracts its own number, combines the electronic key number, the effective unlocking start time and the effective unlocking end time sent by the electronic key, and carries out encryption operation by a DES encryption algorithm through a built-in electronic key authorization information verification mechanism to obtain 1 verification key;

Referring to fig. 1 and 2, the intelligent lock used in the method mainly comprises a lock body 1, a lock rod 2, a lock rod spring 3, a lock cylinder 4, a lock tongue 5, an elastic limit pin 6, a pressure plate 7, a first pressure plate spring 8, a second pressure plate spring 9 and an electric control unlocking assembly 10.

Lock rod mounting counter bores are respectively formed in the lower part and the upper part of the right side of the lock body 1; the middle part of the lock body 1 in the vertical direction is provided with a lock cylinder mounting hole with an opening at the left end; a pressing plate mounting groove 1-1 which is recessed upwards is arranged at the left middle position of the lock body 1 in the vertical direction, and the opening end of the pressing plate mounting groove 1-1 is communicated with a lock cylinder mounting hole of the lock body 1; the upper part of the pressure plate mounting groove 1-1 is provided with a solenoid mounting counter bore of which the lower port is communicated with the pressure plate mounting groove 1-1; a lock core limiting pin mounting counter bore is arranged on the right side of a pressure plate mounting groove 1-1 of the lock body 1; a control panel accommodating cavity is formed in the left upper part of the lock body 1; the lock body 1 is provided with 2 electrode through holes at the lower part of the control panel accommodating cavity of the lock body, the upper ports of the 2 electrode through holes are communicated with the control panel accommodating cavity, and the lower ports are communicated with the lock cylinder mounting hole of the lock body 1.

The lock rod 2 is a rod piece which is integrally formed by an upper cross rod, a lower cross rod and a right arc-shaped rod and is U-shaped; the left part of the upper cross rod of the lock rod 2 is provided with a locking notch; the middle part of the lower cross rod of the lock rod 2 is provided with a limit notch; the locking rod spring 3 is arranged at the left end in the locking rod mounting counter bore at the lower part of the lock body 1; the upper cross rod of the lock rod 2 is inserted into the lock rod mounting counter bore at the upper part of the right side of the lock body 1; the lower cross rod of the lock rod 2 is inserted in the lock rod mounting counter bore at the lower part of the lock body 1, and the left end of the lower cross rod of the lock rod 2 is contacted with the lock rod spring; the locking bar spring 3 is used to eject the locking bar 2 to the right when unlocking.

The lock core 4 is rotatably arranged in a lock core mounting hole of the lock body 1; a round counter bore with an opening at the left end is arranged at the left side of the lock cylinder 4 and is used as an electronic key hole 4-1; the right part of the electronic key hole 4-1 of the lock core 4 is provided with a rightward counter bore which is used as a mechanical key hole 4-2, and the left end of the mechanical key hole 4-2 is communicated with the right end of the electronic key hole 4-1; an electronic key limiting groove 4-3 communicated with the electronic key hole 4-1 is formed in the right end wall body of the electronic key hole 4-1 of the lock cylinder 4; 2 conductive beads 4-4 are arranged on the upper wall body of an electronic key hole 4-1 of the lock core 4, and the positions of the 2 conductive beads 4-4 are matched with the positions of 2 electrode through holes of the lock body 1; the upper end of the middle part of the lock core 4 is provided with a downward concave pressure plate abdicating groove 4-5, and the pressure plate abdicating groove 4-5 is positioned below the pressure plate mounting groove 1-1 of the lock body 1 and communicated with the pressure plate mounting groove 1-1 of the lock body 1; the middle part of the lock core 4 is provided with a plurality of movable blades 4-6, and the upper ends of the blades 4-6 are communicated with the pressure plate abdicating groove 4-5 of the lock core 4; the right part of the lock core 4 is provided with an annular anti-falling limiting groove 4-7 which is inwards recessed from the periphery of the lock core 4, and the position of the anti-falling limiting groove 4-7 is matched with the position of a lock core limiting pin mounting counter bore of the lock body 1.

The lock bolt 5 is movably arranged in the lock body 1, the lock bolt 5 is arranged at the right part of the lock core 4, is fixedly connected with the lock core 4 and follows the lock core 4; the shape of the upper end of the lock tongue 5 is matched with the locking notch of the upper transverse rod of the lock rod 2; the shape of the lower end of the lock tongue 5 is matched with the limit notch of the lower cross rod of the lock rod 2.

The elastic limit pin 6 consists of a pin rod 6-1 and a spring 6-2; the pin rod 6-1 and the spring 6-2 are arranged in a lock core limiting pin mounting counter bore of the lock body 1; the upper end of the pin rod 6-1 is propped against the spring 6-2; the lower end of the pin rod 6-1 extends into the anti-falling limiting groove 4-7 of the lock cylinder 4 under the elastic force action of the spring 6-2, so that the lock cylinder 4 is prevented from falling off from the lock cylinder mounting hole of the lock body 1 through the elastic limiting lock 6.

The pressing plate 7 is movably arranged in a space formed by butting a pressing plate mounting groove 1-1 of the lock body 1 and a pressing plate abdicating groove 4-5 of the lock core 4, and the upper end of the pressing plate 7 is propped against the lower ends of 2 first pressing plate springs 8 arranged in the pressing plate mounting groove 1-1 of the lock body 1; the lower end of the pressure plate 7 is propped against 2 second pressure plate springs 9 arranged in the pressure plate abdicating groove 4-5 of the lock core 4; the upper ends of the 2 first pressure plate springs 8 are abutted against the lock body 1; the lower ends of the 2 second pressure plate springs 9 are propped against corresponding blades 4-6 on the lock core 4; in a locking state, under the elastic force action of 2 first pressure plate springs 8 and 2 second pressure plate springs 9, the pressure plate 7 is positioned at the joint of the pressure plate mounting groove 1-1 of the lock body 1 and the pressure plate abdicating groove 4-5 of the lock core 4, so that the lock core 4 is limited to rotate relative to the lock body 1, and locking is realized (as shown in fig. 2).

The electric control unlocking assembly 10 comprises a control board 10-1, an input electrode 10-2, a solenoid 10-3, a push rod 10-4 and a return spring 10-5. The control panel 10-1 is arranged in a control panel accommodating cavity of the lock body 1; 2 input electrodes 10-2 are provided, wherein 1 is an anode, and the other 1 is a cathode; the input electrode as the positive electrode also serves as a signal input terminal; 2 input electrodes 10-2 are respectively arranged in 1 of the 2 electrode through holes of the lock body 1, and the 2 input electrodes 10-2 are respectively contacted with the conductive beads 4-4 of the 1 lock core 4 during locking; the return spring 10-5 is sleeved on the upper part of the ejector rod 10-4; the middle lower part of the top rod 10-4 is inserted in the solenoid 10-3; the lower end of the return spring 10-5 is propped against the upper end of the solenoid 10-3; the solenoid 10-3 is fixedly arranged at the middle lower part in the solenoid mounting counter bore of the lock body 1, and the lower part of the solenoid 10-3 extends out of the pressing plate mounting groove 1-1 of the lock body 1; the ejector rod 10-4 is made of an electromagnet, the solenoid 10-3 generates magnetic force when being electrified, the ejector rod 10-4 can overcome the elastic force of the return spring 10-5 to extend out of the solenoid 10-3 downwards, and when the solenoid 10-3 is de-electrified, the ejector rod 10-4 is reset under the action of the return spring 10-5.

Referring to fig. 5, a power conversion module, a signal decoupling analysis module, a main control MCU, a memory and an electromagnet driving module are disposed on the control board 10-1, wherein:

the memory is used for information storage interaction with the master control MCU; the memory is electrically connected with the master control MCU in a bidirectional signal mode.

Referring to fig. 6 to 8, the electronic key 100 used in the foregoing method is mainly composed of a housing and a circuit device.

The shell comprises a main body part 100-1 and a plug part 100-2 which are integrally connected; the plug 100-2 is a cylindrical member, and the size of the plug 100-2 is matched with the size of the electronic key hole 4-1 of the lock cylinder 4; a limiting protrusion 100-3 is arranged above the right end of the connecting part 100-2, and the limiting protrusion 100-3 is matched with an electronic key limiting groove 4-3 of the lock core 4 when in use.

The circuit device comprises an MCU, a signal and power coupling module, a second memory, a communication module, an SIM card, a lithium battery, a battery management module, a power module, an output electrode 100-4, a key switch 100-5, an LCD display screen 100-6, a USB interface 100-7 and a charging interface 100-8; the MCU, the signal and power coupling module, the second memory, the SIM card, the communication module, the lithium battery, the battery management module and the power module are arranged in the shell; 2 output electrodes 100-4 are provided, and 2 output electrodes 100-4 are arranged on the outer peripheral wall of the plug portion 100-2 of the shell in a circular ring shape; the key switch 100-5, the LCD display screen 100-6, the USB interface 100-7 and the charging interface 100-8 are arranged on the main body part 100-1 of the shell. The signal and power coupling module, the second memory, the communication module, the battery management module, the key switch 100-5, the LCD display screen 100-6 and the USB interface 100-8 are respectively in signal electrical connection with the MCU; the output electrode 100-4 is electrically connected with the signal and power coupling module; the SIM card is in signal electrical connection with the communication module; the battery management module is electrically connected with the lithium battery and the charging interface 100-8 respectively; the power module is electrically connected with the battery management module.

The functions of the components of the circuit device of the electronic key 100 in use are as follows:

the key switch 100-5 is used for controlling the on-off of a power supply and the on-off of remote wireless communication;

the LCD display screen 100-6 is used for displaying information in real time;

the USB interface 100-7 is used for being plugged with a management server of a power supply department to realize information interaction including local acquisition of an unlocking key;

the charging interface 100-8 is used for being externally connected with a power supply and charging the lithium battery through the battery management module;

the lithium battery is responsible for power supply;

the signal and power coupling module is used for coupling the unlocking key information sent by the MCU with a power obtained from the power module, and outputting the power coupled with the unlocking key information to the output electrode 100-4;

and an output electrode 100-4 for outputting a power supply coupled with the unlocking key information.

In step ④, the electronic key 100 is plugged into the management server through the USB interface 100-7 to obtain the unlocking key and the unlocking authorization information, and the electronic key 100 remotely and wirelessly communicates with the management server through the communication module on the inspection site to obtain the unlocking key and the unlocking authorization information.

Referring to fig. 3 and 4, in step ⑤ of the foregoing method, after the electronic key 100 is inserted into the electronic keyhole 4-1 of the key cylinder 4 of the smart lock, the electronic key 100 is electrically connected to 2 input electrodes 10-2 of the electronically controlled unlocking assembly 10 of the smart lock through 2 output electrodes 100-4 of the electronic key 100-4 provided on the housing plug 100-2 via 2 conductive beads 4-4 of the key cylinder 4, and the electronically controlled unlocking assembly 10 of the smart lock starts to operate by powering the electronic key 100 through the key switch 100-5 on the electronic key 100:

the signal decoupling analysis module on the control board 10-1 of the electronic control unlocking assembly 10 analyzes the unlocking key, the electronic key number, the effective unlocking start time and the effective unlocking end time information sent by the electronic key 100 from the power supply coupled with the unlocking key information and output by the electronic key 100, and sends the information to the main control MCU of the intelligent lock for processing.

In step ⑥ of the method, the intelligent lock extracts its own number from its main control MCU, and performs DES encryption algorithm to obtain an authentication key by combining the electronic key number, the effective unlocking start time, and the effective unlocking end time information sent by the signal decoupling analysis module through a built-in electronic key authorization information authentication mechanism.

In the step ⑦ of the method, the master control MCU of the intelligent lock compares a verification key obtained by calculation with an unlocking key sent by the electronic key 100, if 2 keys are different, the master control MCU judges that the electronic key is not authorized and rejects the action, if 2 keys are the same, the master control MCU extracts the current time and further judges whether the current time is between the effective unlocking start time and the effective unlocking end time, if not, the master control MCU judges that the electronic key 100 is not authorized and rejects the action, if the master control MCU confirms that the electronic key 100 is authorized, the master control MCU supplies power to the solenoid 10-3 through the electromagnet driving module, the solenoid 10-3 generates magnetic force when the solenoid 10-3 is powered on, so that the ejector pin 10-4 made of the electromagnet material overcomes the elastic force of the return spring 10-5 and extends out of the lock rod 10-3 downwards, the ejector pin 10-4 pushes the pressing plate 7 downwards into the pressing plate 4-5 of the lock cylinder 4 (as in an unlocking figure 4), the electronic key 100 drives the electronic pressing plate 4 to rotate into the pressing plate 4-4 to make the pressing plate 4 to move downwards to make the lock cylinder 4 to be in the lock cylinder 4, when the lock cylinder 4 rotates beyond a certain angle (preferably 3), the lock-locking angle, the lock cylinder 4 is pressed, the lock cylinder 4 is pressed by the lock cylinder 4, the lock cylinder 4 is enabled by the lock cylinder, the lock cylinder 4 is enabled to be capable of the lock cylinder, the lock cylinder 4, the lock cylinder 4 is enabled by the lock cylinder, the.

Preferably, the smart lock is further provided with an emergency mechanical key which is used by a power supply management department as a standby for emergency unlocking, and the emergency mechanical key is matched with the mechanical key hole 4-2 of the lock cylinder 4 for unlocking, which is the prior art and is not described in detail.

The above embodiments and application examples are illustrative of specific embodiments of the present invention, and are not intended to limit the present invention, and those skilled in the art can make various changes and modifications to obtain equivalent technical solutions without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should be included in the scope of the present invention.

Claims

1. A five-prevention intelligent lock authorization verification method for outdoor equipment of a power distribution network is characterized by comprising the following steps: the authorization verification method is implemented by a management server arranged in a power supply management department, an intelligent lock arranged on outdoor equipment of the power distribution network and an electronic key carried by patrol personnel of the outdoor equipment of the power distribution network during use, and comprises the following steps:

⑦ the intelligent lock compares the verification key obtained by calculation with the unlocking key sent by the electronic key, if the 2 keys are different, the intelligent lock judges that the electronic key is not authorized, refuses to operate and can not unlock, if the 2 keys are the same, the intelligent lock extracts the current time information and further judges whether the current time is between the effective unlocking starting time and the effective unlocking ending time, if so, the intelligent lock judges that the electronic key is authorized, the intelligent lock executes the unlocking operation and can unlock, if not, the intelligent lock judges that the electronic key is not authorized, the intelligent lock refuses to operate and can not unlock;

the intelligent lock comprises a lock body (1), a lock rod spring (3) arranged in the lock body (1), a lock rod (2) elastically arranged on the lock body (1) through the lock rod spring (3), a lock cylinder (4) rotatably arranged in the lock body (1), a lock tongue (5) which is arranged in the lock body (1), is fixedly connected with the lock cylinder (4) and is movably matched with the lock rod (2), and an elastic limit pin (6) which is arranged in the lock body (1) and is used for preventing the lock cylinder (4) from falling from the lock body (1); the method is characterized in that: the lock further comprises a pressing plate (7) movably arranged in the lock body (1) and used for controlling unlocking and locking, a first pressing plate spring (8) and a second pressing plate spring (9) which are arranged in the lock body (1) and used for supporting the pressing plate (7) from the upper part and the lower part respectively and movably matched with the pressing plate (7), and an electric control unlocking assembly (10);

the electronic control unlocking assembly (10) comprises a control plate (10-1), a solenoid (10-3), a push rod (10-4), a return spring (10-5) and 2 input electrodes (10-2) which are arranged in the lock body (1) and can be electrically connected with the outside; the return spring (10-5) is sleeved on the upper part of the ejector rod (10-4); the lower end of the return spring (10-5) is propped against the upper end of the solenoid (10-3); the middle lower part of the top rod (10-4) is inserted in the solenoid (10-3);

the control panel (10-1) is provided with a power supply conversion module, a signal decoupling analysis module, a main control MCU, a memory and an electromagnet driving module; wherein:

the electronic key comprises a shell and a circuit device; the shell comprises a main body part (100-1) and a plug part (100-2) which are integrally connected; the inserting part (100-2) is a cylindrical piece, and a limiting protrusion (100-3) is arranged on the inserting part (100-2);

the circuit device comprises an MCU (microprogrammed control Unit), a signal and power coupling module, a second memory, a communication module, an SIM (subscriber identity Module) card, a lithium battery, a battery management module and a power module which are arranged in a shell, a key switch (100-5), an LCD (liquid crystal display) screen (100-6), a USB (universal serial bus) interface (100-7) and a charging interface (100-8) which are arranged on a main body part (100-1) of the shell, and 2 output electrodes (100-4) which are arranged on the peripheral wall of a plug part (100-2) of the shell and are in a ring shape;

the signal and power coupling module, the second memory, the communication module, the battery management module, the key switch (100-5), the LCD display screen (100-6) and the USB interface (100-8) are respectively in signal electrical connection with the MCU; the output electrode (100-4) is electrically connected with the signal and power coupling module; the SIM card is in signal electrical connection with the communication module; the battery management module is respectively and electrically connected with the lithium battery and the charging interface (100-8); the power supply module is electrically connected with the battery management module; wherein:

the key switch (100-5) is used for controlling the on-off of the power supply and the on-off of the remote wireless communication;

the LCD display screen (100-6) is used for displaying information in real time;

the USB interface (100-7) is used for being plugged with a management server of a power supply department during use, and information interaction including local acquisition of an unlocking key is realized;

the charging interface (100-8) is used for being externally connected with a power supply when in use and charging the lithium battery through the battery management module;

the lithium battery is responsible for power supply;

the signal and power coupling module is used for coupling the unlocking key information sent by the MCU with a power obtained from the power module and outputting the coupled power to the output electrode (100-4);

an output electrode (100-4) for outputting a power supply coupled with the unlock key information;

the lock body (1) is provided with a lock cylinder mounting hole with an opening at the left end in the middle part in the vertical direction; the middle part of the lock body (1) is provided with a pressing plate mounting groove (1-1) which is recessed upwards, and the opening end of the pressing plate mounting groove (1-1) is communicated with a lock core mounting hole of the lock body (1); the upper part of the pressure plate mounting groove (1-1) is provided with a solenoid mounting counter bore of which the lower port is communicated with the pressure plate mounting groove (1-1); a control panel accommodating cavity is formed in the left upper part of the lock body (1); the lock body (1) is provided with 2 electrode through holes at the lower part of a control panel accommodating cavity of the lock body (1), the upper port of each electrode through hole is communicated with the control panel accommodating cavity, and the lower port of each electrode through hole is communicated with a lock cylinder mounting hole of the lock body (1);

the lock cylinder (4) is rotatably arranged in a lock cylinder mounting hole of the lock body (1); the first pressure plate spring (8) is arranged in a pressure plate mounting groove (1-1) of the lock body (1); the control panel (10-1) of the electric control unlocking assembly (10) is arranged in the control panel accommodating cavity of the lock body (1); 2 input electrodes (10-2) are respectively arranged in 1 of the 2 electrode through holes of the lock body (1); the push rod (10-4) and the return spring (10-5) are fixedly arranged in a solenoid installation counterbore of the lock body (1), the solenoid (10-3) is fixedly arranged at the middle lower part of the solenoid installation counterbore of the lock body (1), and the lower part of the solenoid (10-3) extends out of a pressure plate installation groove (1-1) of the lock body (1).

2. The authentication method for the authorization of the five-prevention intelligent lock of the outdoor equipment of the power distribution network according to claim 1, wherein in the step ④, the electronic key is plugged with the management server through a USB interface (100-7) of the electronic key locally to obtain the unlocking key and the unlocking authorization information, or the electronic key is remotely and wirelessly communicated with the management server through a communication module of the electronic key on the inspection site to obtain the unlocking key and the unlocking authorization information.

3. The authentication method for the authorization of the five-prevention intelligent lock of the outdoor equipment of the power distribution network according to claim 1 is characterized in that in the step ⑤, the electronic key is inserted into the electronic key hole (4-1) of the intelligent lock core (4) through the shell insertion part (100-2) of the electronic key, 2 output electrodes (100-4) on the shell insertion part (100-2) of the electronic key are electrically connected with 2 input electrodes (10-2) of the electronic control unlocking component (10) of the intelligent lock through 2 conductive beads (4-4) of the lock core (4), the electronic key is unlocked through the key switch (100-5) of the electronic key, the electronic control unlocking component (10) of the intelligent lock is electrically operated from the electronic key, and the unlocking key, the electronic key number, the valid unlocking start time and the valid unlocking end time information sent by the electronic key are analyzed from the power supply coupled with the unlocking key information and output by the signal decoupling analysis module on the control panel (10-1) of the electronic key by the electronic key unlocking component (10-5) and sent to the master control process of the intelligent lock.

4. The authentication method for the authorization of the five-prevention intelligent lock of the outdoor equipment of the power distribution network of claim 1, wherein in the step ⑥, the intelligent lock extracts the number of the intelligent lock by the main control MCU, and performs DES encryption algorithm for encryption operation by a built-in electronic key authorization information authentication mechanism in combination with the electronic key number, the effective unlocking start time and the effective unlocking end time information sent by the signal decoupling analysis module to obtain an authentication key.

5. The authentication method of the five-prevention intelligent lock of the outdoor equipment of the power distribution network according to claim 4 is characterized in that in step ⑦, the intelligent lock compares the calculated authentication key with the unlocking key sent by the electronic key through the main control MCU, if the 2 keys are different, the main control MCU judges that the electronic key is not authorized and rejects the action, if the 2 keys are the same, the main control MCU extracts the current time and further judges whether the current time is between the effective unlocking starting time and the effective unlocking ending time, if not, the main control MCU judges that the electronic key 100 is not authorized and rejects the action, if so, the main control MCU confirms that the electronic key is authorized, the main control MCU supplies power to the solenoid (10-3) through the electromagnet driving module, the solenoid (10-3) is electrified to generate magnetic force, so that the ejector rod (10-4) made of the electromagnet overcomes the elastic force of the reset spring (10-5) and stretches out from the solenoid (10-3), the ejector rod (10-4) pushes the pressing plate (7) downwards into the lock cylinder (4) to unlock the lock cylinder (4) through the electronic rotation key.

6. The authentication method for the five-prevention intelligent lock authorization of the outdoor equipment of the power distribution network according to claim 1, characterized in that: a lock core limiting pin mounting counter bore is formed in the right side of the pressing plate mounting groove (1-1) of the lock body (1); the right part of the lock core (4) is provided with an annular anti-falling limiting groove (4-7) which is inwards recessed from the periphery of the lock core (4), and the position of the anti-falling limiting groove (4-7) is matched with the position of a lock core limiting pin mounting counter bore of the lock body (1);

the elastic limiting pin (6) consists of a pin rod (6-1) and a spring (6-2); the pin rod (6-1) and the spring (6-2) are arranged in a lock core limiting pin mounting counter bore of the lock body (1); the upper end of the pin rod (6-1) is propped against the spring (6-2); the lower end of the pin rod (6-1) elastically extends into the anti-falling limiting groove (4-7) of the lock core (4).

7. The authentication method for the five-prevention intelligent lock authorization of the outdoor equipment of the power distribution network according to claim 1, characterized in that: lock rod mounting counter bores are respectively formed in the lower part and the upper part of the right side of the lock body (1); the lock rod (2) is a rod piece which is integrally formed by an upper cross rod, a lower cross rod and a right arc-shaped rod and is U-shaped; a locking notch is arranged at the left part of the upper transverse rod of the lock rod (2); the middle part of the lower cross rod of the lock rod (2) is provided with a limiting notch; the lock rod spring (3) is arranged at the left end in the lock rod mounting counter bore at the lower part of the lock body (1); the upper cross rod of the lock rod (2) is inserted into the lock rod mounting counter bore at the upper part of the right side of the lock body (1); the lower cross rod of the lock rod (2) is inserted into the lock rod mounting counter bore at the lower part of the lock body (1), and the left end of the lower cross rod of the lock rod (2) is elastically contacted with the lock rod spring (3);

the shape of the upper end of the lock tongue (5) is matched with the locking notch of the upper transverse rod of the lock rod (2); the shape of the lower end of the lock tongue (5) is matched with the limiting notch of the lower cross rod of the lock rod (2).

8. The authentication method for the five-prevention intelligent lock authorization of the outdoor equipment of the power distribution network according to claim 1, characterized in that: a round counter bore with an opening at the left end is arranged at the left side of the lock cylinder (4) and is used as an electronic key hole (4-1); the right part of the electronic key hole (4-1) of the lock core (4) is provided with a rightward counter bore communicated with the electronic key hole (4-1) and used as a mechanical key hole (4-2); an electronic key limiting groove (4-3) with an opening end communicated with the electronic key hole (4-1) is arranged on the right end wall body of the electronic key hole (4-1) of the lock core (4); 2 conductive beads (4-4) are arranged on the upper wall body of an electronic key hole (4-1) of the lock cylinder (4), and the 2 conductive beads (4-4) are correspondingly contacted with 2 input electrodes (10-2) of the electronic control unlocking component (10) during locking; the upper end of the middle part of the lock core (4) is provided with a downward concave pressing plate abdicating groove (4-5), and the pressing plate abdicating groove (4-5) is positioned below the pressing plate mounting groove (1-1) of the lock body (1) and communicated with the pressing plate mounting groove (1-1) of the lock body (1); the middle part of the lock core (4) is provided with a plurality of movable blades (4-6), and the upper end of each blade (4-6) is communicated with the pressure plate abdicating groove (4-5) of the lock core (4);

the pressing plate (7) is movably arranged in a space formed by butting the pressing plate mounting groove (1-1) of the lock body (1) and the pressing plate abdicating groove (4-5) of the lock cylinder (4), and the upper end surface of the pressing plate (7) is abutted against the lower end of the first pressing plate spring (8); the second pressure plate spring (9) is arranged in a pressure plate abdicating groove (4-5) of the lock cylinder (4), and the upper end of the second pressure plate spring (9) is propped against the lower end surface of the pressure plate (7); the lower end of the second pressure plate spring (9) is propped against the blades (4-6) of the lock core (4)

The first pressure plate spring (8) and the second pressure plate spring (9) are respectively provided with 2.