CN104763243A - Secure electronic anti-theft lock and unlocking method thereof - Google Patents

Abstract

The invention relates to a safe electronic anti-theft lock, which comprises a shell, a lining plate is arranged on the shell, a main tongue hole is arranged on the lining plate, a knob switch and a lock head assembly are arranged on the outside of the shell, and a main tongue assembly is arranged on the inside of the shell. And the main tongue return spring, the technical points are that the housing is provided with a transmission fork and a toggle assembly, a first clutch device is provided between the transmission fork and the lock head assembly, and there is a device in the housing that can be driven by the transmission fork. The toggle assembly and the second clutch device for clutching the rotary switch. The invention has the advantages of simple structure, idling when the unlocking mechanism does not match, and high anti-theft performance. The present invention also relates to a method for unlocking a safe electronic anti-theft lock, which includes the following steps: a. Fingerprint verification; b. Touch to select the unlocking mode. When selecting the password to unlock, perform step c1; when selecting the key to unlock, perform Step c2; c1, enter the password; c2, match the key; d, unlock the knob. The invention has simple steps, convenient operation and high safety.

Description

A safe electronic anti-theft lock and unlocking method thereof

【Technical field】

The invention relates to an anti-theft lock and a method for opening the anti-theft lock, which can be used for door locks and safes.

【Background technique】

Most of the existing lock bodies open the door through a key and a handle. When the key is inserted correctly, the lock head can rotate to drive the dead bolt to retract, and the handle can drive the dead bolt to retract. When the key is inserted incorrectly or when no key is inserted, the lock head and the handle cannot be rotated. When the lock body is unlocked illegally, the lock cylinder can be rotated to unlock as long as the pins or blades are matched and aligned, and the safety performance is relatively low. Some of the opening methods of these locks are opened only by fingerprint or password, and the opening method is single, and the safety performance is low.

【Content of invention】

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a safe electronic anti-theft lock in which both the lock head assembly and the knob switch can be idling. Another purpose of the present invention is to provide a safe electronic anti-theft lock with high safety performance. Open method.

In order to solve the above problems, the present invention adopts the following technical solutions:

A safe electronic anti-theft lock, comprising a shell, the shell is provided with a liner, the liner is provided with a main tongue hole, and the outer side of the shell is provided with a hole that extends into the lock shell. The rotary switch and the lock head assembly, the inside of the housing is provided with a main tongue assembly that can expand and contract from the main tongue hole and a main tongue return spring that can elastically reset the main tongue assembly, characterized in that: The housing is provided with a transmission fork driven by the lock head assembly and a toggle assembly driven by the rotary switch to toggle the retraction of the main tongue assembly. The transmission fork and the lock head assembly There is a first clutch device that can receive electrical signals to control the clutch between the two, and the housing is provided with a second clutch device that can be driven by the transmission fork to clutch the toggle assembly and the knob switch.

A safe electronic anti-theft lock as described above is characterized in that: the housing is provided with an electric control assembly capable of driving the second clutch device, the electric control assembly includes a main control circuit board, the The main control circuit board is provided with a fingerprint module and a touch module, the housing is also provided with a drive motor controlled by the touch module to start and stop, and the motor shaft of the drive motor is provided with The rotary shift block that is driven to rotate by it to stir the clutch of the second clutch device.

A safe electronic anti-theft lock as described above is characterized in that: the lock assembly includes a lock housing and a lock cylinder disposed in the lock housing, and one end of the transmission fork is rotatably sleeved on the lock housing. The end of the lock head shell extending into the housing, the end of the lock cylinder extending into the housing is provided with a paddle that can rotate with the lock cylinder, and the first clutch device includes a fixed The first solenoid valve on the transmission fork, the first solenoid valve is provided with a first clutch plate that is driven to expand and contract and can extend below the plectrum, and the first clutch plate extends to the After the paddle is below the paddle, the paddle can flip the first clutch plate to drive the transmission fork to rotate.

A safe electronic anti-theft lock as described above is characterized in that: the end of the rotary switch protruding into the casing is provided with a ratchet wheel that rotates with the rotary switch, and the toggle assembly includes a rotatable wheel mounted on the casing. The swivel seat in the body and the main tongue shift fork that is set on the swivel seat and moves the main tongue assembly to retract with the rotation of the swivel seat. The swivel seat is provided with a clutch cavity, and the ratchet extends into the clutch In the chamber, the second clutch device includes a second solenoid valve on the swivel seat. The second solenoid valve is equipped with a telescopic drive driven by it and can extend into the clutch chamber to extend to the The second clutch on the ratchet side of the ratchet, the second electromagnetic valve is provided with a touch point, and the second clutch device also includes a gear that can be moved by the transmission fork or the rotating block. The sliding block that slides in the casing, the sliding block is provided with a touch guide slide that can press the touch point, and the sliding block is provided between the sliding block and the casing Reset sliding block return spring.

A safe electronic anti-theft lock as described above is characterized in that: a touch annunciator capable of sending an alarm signal is provided on the side of the lock head assembly in the housing, and a touch annunciator is provided on the touch annunciator. There is a touch shrapnel, and the lock head assembly is provided with a lock cylinder rod that can be pushed to press the touch shrapnel when the key is inserted.

A safe electronic anti-theft lock as described above is characterized in that: the main tongue assembly includes a main tongue plate that is toggled and moved by the toggle assembly and a main tongue arranged on the main tongue plate, The transmission gear is hinged in the housing, and the main tongue teeth meshing with the transmission gear are arranged on the main tongue plate. A heaven and earth tongue and a heaven and earth tongue tooth meshed with the transmission gear are provided.

A safe electronic anti-theft lock as described above is characterized in that: the liner is provided with a self-collision tongue hole, and the housing is provided with a self-collision tongue that can expand and contract from the self-collision tongue hole. , the housing is provided with a locking plate that can lock the main tongue assembly when the main tongue assembly is retracted into the lock housing, and one end of the housing is hinged against the other end of the self-touching tongue The linkage piece leaning against the locking piece, when the self-collision tongue moves into the housing, it pushes the linkage piece to rotate and drives the locking piece to move downward to unlock, and the housing is equipped with a locking piece that moves upward Spring loaded locking spring.

A safe electronic anti-theft lock as described above is characterized in that: the lock plate is provided with an inclined guide sliding edge pressed against the main tongue assembly and a lock hook capable of locking the main tongue assembly .

A safe electronic anti-theft lock as described above is characterized in that: the housing is provided with an infrared induction alarm capable of sensing infrared rays and emitting an alarm signal, and a vibration induction alarm capable of sensing vibration and sending an alarm signal.

A method for unlocking a safe electronic anti-theft lock, characterized in that it comprises the following steps:

a. Fingerprint verification, press the fingerprint on the fingerprint module;

b. Touch to select the unlocking mode. When the fingerprint matching in step a is correct, select the unlocking mode by manipulating the touch module. When selecting the password to unlock, proceed to step c1; when selecting the key to unlock, proceed to step c2;

c1. Enter the password. After inputting the correct password by manipulating the touch module, control the drive motor to start, so that the second clutch device will act as a clutch;

c2. Key matching, after the key is selected to unlock, the main control circuit board sends a signal to the first clutch device to make the first clutch device act as a clutch, insert the key into the lock assembly, turn the key, and the lock assembly will drive the transmission fork Make the second clutch device actuate to clutch;

d. The knob is unlocked. When the second clutch device is in operation, turn the knob switch to drive the toggle assembly to retract the main tongue assembly into the housing, and the lock body is opened.

The beneficial effects of the present invention are as follows: Initially, both the lock assembly and the knob switch are idling, and when the unlocking signal is received, the first clutch device starts, the lock assembly is clutched with the transmission fork, and when the key is inserted, the lock assembly is rotated It can drive the transmission fork to rotate, and one end of the transmission fork presses down the second clutch device to make the toggle assembly and the knob switch clutch. At this time, the rotation of the knob switch can drive the toggle assembly to open the main tongue assembly, so that the unlocking is completed. After the correct key is inserted, the lock head assembly is still idling, so no matter how the lock cylinder is matched, the lock cannot be unlocked, which greatly improves the safety performance of the lock body; The lock piece locks the main tongue assembly. When the door is closed, the door squeezes the self-touch tongue, and the self-touch tongue retracts, driving the linkage piece to rotate, so that the linkage piece moves the lock piece down to unlock. Under the elastic force of the main tongue return spring The main tongue assembly is ejected and locked, so that no key is needed to eject the main tongue assembly, which improves the convenience; there is also a heaven and earth tongue in the lock housing, which protrudes as the main tongue assembly is ejected, and retracts as the main tongue assembly retracts. Retraction improves the safety of the lock body; after fingerprint verification, select the password or key to unlock, and then turn the knob switch to open the deadbolt assembly. The optional opening method is convenient for users to unlock, and at the same time, the password is encrypted by fingerprint Or the combination of keys improves the security of unlocking.

【Description of drawings】

Fig. 1 is the front view of the present invention;

Fig. 2 is a perspective view of the present invention;

Fig. 3 is a rear view of parts of the present invention;

Fig. 4 is an assembly perspective view of the toggle assembly, the rotary switch and the second clutch device of the present invention;

5 is a front view of the components of the toggle assembly, the rotary switch and the second clutch device of the present invention;

Figure 6 is a schematic diagram of the assembly of the main tongue assembly and the heaven and earth tongue of the present invention;

Fig. 7 is a perspective view of the assembly of the transmission fork, the lock head assembly and the first clutch device of the present invention;

Fig. 8 is a schematic diagram of the steps of the unlocking method of the present invention.

【Detailed ways】

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

As shown in Figures 1 to 7, a safe electronic anti-theft lock includes a housing 1, a liner 10 is provided on the housing 1, a main tongue hole 101 is provided on the liner 10, and an end extension is provided on the outside of the housing 1. The rotary switch 2 and the lock head assembly 3 inserted into the lock case 1, the inside of the case 1 is provided with the main tongue assembly 4 that can be stretched from the main tongue hole 101 and the main tongue return spring 11 that can elastically reset the main tongue assembly 4 The inside of the housing 1 or the inside of the housing 1 refers to the side inside the door or inside the safe, and the outside of the housing 1 or outside the housing 1 refers to the side outside the door or outside the safe. The housing 1 is provided with a transmission fork 5 driven by the lock assembly 3 and a toggle assembly 6 driven by the knob switch 2 to retract the main tongue assembly 4 . There is a first clutch device 7 capable of receiving electrical signals to control the clutching of the two. This electrical signal can be sent through a circuit board arranged on the housing 1 or through a remote controller. The lock assembly 3 comprises a lock shell 31 and is provided with a lock core 32 in the lock shell 31. One end of the transmission fork 5 is hinged on the end of the lock shell 31 extending into the housing 1, and the lock core 32 extends into the housing 1. One end of the housing 1 is provided with a paddle 33 that can rotate with the lock cylinder 32 , and the first clutch device 7 includes a first electromagnetic valve 71 fixed on the transmission fork 5 . The first solenoid valve 71 is provided with a first clutch plate 72 driven by it to stretch and extend to the bottom of the plectrum 33. After the first clutch plate 72 stretches to the bottom of the plectrum 33, the plectrum 33 can move the first clutch plate 72 Drive the transmission fork 5 to rotate, and the first electromagnetic valve 71 drives the first clutch plate 72 to move below the paddle 33 after receiving the signal, so that the rotation of the paddle 33 can drive the first clutch plate 72 to rotate, so that the transmission fork 5 rotations, a guide chute can be set on the transmission shift fork 5, the first clutch plate 72 slides in the guide chute, and the first clutch plate 72 drives the plectrum 33 to rotate by the guide chute wall when rotating. When the signal is sent and the unlocking operation is not performed within the set time, the first electromagnetic valve 71 resets, and the lock head will idle.

The casing 1 is provided with a second clutch device 8 that can be driven by the transmission fork 5 to clutch the toggle assembly 6 and the rotary switch 2 . One end of the rotary switch 2 protruding into the housing 1 is provided with a ratchet 21 that rotates with the rotary switch 2, and the toggle assembly 6 includes a rotatable swivel seat 61 that is arranged in the casing 1 and a swivel seat 61 that is arranged on the swivel seat 61 to follow the rotation. The swivel base 61 rotates to move the main tongue shift fork 62 retracted by the main tongue assembly 4. The swivel base 61 is provided with a clutch chamber 63, and the ratchet 21 extends into the clutch chamber 63, so that the ratchet 21 can run idle. The second clutch device 8 includes a second solenoid valve 81 arranged on the swivel seat 61, and the second solenoid valve 81 is provided with a second solenoid valve that is driven to expand and contract and can extend into the clutch chamber 63 and extend to one side of the ratchet wheel 21. The clutch 82 can be provided with a slot on the swivel seat 61 for the second clutch 82 to be inserted into the clutch cavity 63. When the second clutch 82 is inserted into the ratchet side of the ratchet 21, the ratchet 21 is rotated, and the ratchet Press against the second clutch 82 to drive the second clutch 82 to rotate. The second solenoid valve 81 is provided with a touch point 83. When the touch point 83 is pressed, the second solenoid valve 81 starts to drive the second clutch 82. Stretch out, and when the touch point 83 is released, the second clutch member 82 is driven to reset. The second clutch device 8 also includes a sliding block 84 that is moved by the transmission fork 5 or the rotating block 92 and slides in the housing 1. The sliding block 84 is provided with a touch guide slide 85 that can press the touch point 83 , the touch guide slide 85 is an arc-shaped piece, and the touch guide slide 85 presses the touch point 83 when the sliding block 84 moves downward. When the swivel seat 61 rotates, the second electromagnetic valve 81 rotates accordingly, and the touch point 83 also rotates accordingly. When the touch point 83 rotates, it slides along the arc-shaped sheet, and is always in contact with the arc-shaped sheet. A sliding block return spring 86 capable of restoring the sliding block 84 is provided between the sliding block 84 and the housing 1 .

The housing 1 is provided with a touch annunciator 12 capable of sending an alarm signal on one side of the lock assembly 3, and the touch annunciator 12 is provided with a touch shrapnel 13, and the touch shrapnel 13 is the touch annunciator 12 The lock head assembly 3 is provided with a lock cylinder rod 34 that can be pushed and pressed against the touch shrapnel 13 when the key is inserted. When the unlock signal is not sent, that is, the first clutch device 7 is not activated, and the touch signaler 12 is in the activated state, even if the correct key is inserted, the lock cylinder rod 34 will be pushed to press the touch shrapnel 13 and the touch annunciator 12 will be opened to generate an alarm signal, and the touch shrapnel 13 will reset to reset the lock cylinder rod 34.

The main tongue assembly 4 includes the main tongue 41 which is moved by the toggle assembly 6 and the main tongue 42 which is arranged on the main tongue 41. The transmission gear 14 is hinged in the housing 1, and the main tongue 41 is provided with a transmission gear. The main tongue 43 meshed with the gear 14 is also provided with a sky-earth tongue 15 inside the housing 1 , and the sky-earth tongue 15 is provided with a sky-earth tongue 16 and a sky-earth tongue 17 meshing with the transmission gear 14 .

The liner 10 is provided with a self-collision tongue hole 102, and the housing 1 is provided with a self-collision tongue 18 which can expand and contract from the self-discussion tongue hole 102. Lock the locking piece 20 of the main tongue assembly 4, and the casing 1 is hinged with a linkage piece 19 with one end abutting on one side of the self-collision tongue 18 and the other end abutting on the locking plate 20, from the self-collision tongue 18 to the inside of the housing 1 When moving, the linkage piece 19 is pushed to rotate to drive the lock piece 20 to move downward to unlock, and the housing 1 is provided with a locking spring 28 that springs the lock piece 20 upward. The locking piece 20 is provided with an inclined sliding edge 201 pressed against the main tongue assembly 4 and a lock hook 202 capable of locking the main tongue assembly 4 . When the main tongue assembly 4 is retracted, the inclined sliding edge 201 of the locking piece 20 is squeezed, and the locking piece 20 is pressed to move downward. When one end of the main tongue assembly 4 moves to the locking hook 202, the elastic force of the tight spring 28 Moving up and down, the locking hook 202 locks and locks the main tongue assembly 4 . When the self-touching tongue 18 is squeezed and retracted by the door, it drives the linkage piece 19 to rotate, and the linkage piece 19 rotates and moves the lock piece 20 to move downwards, and the lock hook 202 no longer hooks the main tongue assembly 4, and the main tongue assembly 4 is on the main tongue assembly. Reset under the elastic force of tongue return spring 11, eject.

The housing 1 is provided with an electric control assembly 9 capable of driving the second clutch device 8. The electric control assembly 9 includes a main control circuit board on which a fingerprint module 90 and a touch module 95 are arranged. There is a drive motor 91 controlled by the touch module 95 to start and stop, and the motor shaft of the drive motor 91 is provided with a rotary dial 92 that is driven to rotate and toggle the second clutch device 8. When the touch module 95 inputs When the password is correct, the driving motor 91 starts to drive the rotating dial 92 to rotate, and the rotating dial 92 presses down the second clutch device 8, so that the toggle assembly 6 is clutched with the rotary switch 2, and the rotating rotary switch 2 can open the main tongue assembly. The housing 1 is provided with an infrared induction alarm 93 capable of sensing infrared rays and emitting an alarm signal, and a vibration induction alarm 94 capable of sensing vibration and sending an alarm signal. When the lock body is locked, the infrared induction alarm 93 and the vibration induction alarm 94 can be opened, and when someone passes through the lock body, the infrared induction alarm 93 senses and sends an alarm signal to the police; when someone knocks on the lock body or When the lock body is vibrated, the vibration induction alarm 94 is induced to send an alarm signal.

As shown in Figure 8, a method for unlocking a safe electronic anti-theft lock includes the following steps:

a. Fingerprint verification, press the fingerprint on the fingerprint module 90 .

b. Touch to select the unlocking mode. After the fingerprint matching in step a is correct, select the unlocking mode by manipulating the touch module 95. The touch screen on the touch module 95 will display a menu. Touch to select, and when the password is selected to unlock, proceed Step c1; when the key is selected to unlock, go to step c2.

c1. Input the password. After inputting the correct password by manipulating the touch module 95 , control the drive motor 91 to start, so that the second clutch device 8 is engaged and disengaged.

c2. Key matching, after the key is selected to unlock, the main control circuit board sends a signal to the first clutch device 7 to make the first clutch device 7 act as a clutch, insert the key into the lock head assembly 3, turn the key, and when the correct key is inserted , the lock head assembly 3 will drive the transmission fork 5 to make the second clutch device 8 move and clutch.

d. The knob is unlocked. When the second clutch device 8 is engaged and disengaged, the knob switch 2 is turned to drive the toggle assembly 6 to retract the main tongue assembly 4 into the housing 1, and the lock body is opened. When unlocking is operated by step c2, the key is not reset after turning, and the rotary switch 2 is rotated at the same time. If the key is reset, the second clutch device 8 is also reset, and the rotary switch 2 will idle.

Claims (10)

1. A safe electronic anti-theft lock, comprising a housing (1), the housing (1) is provided with a liner (10), and the liner (10) is provided with a main tongue hole (101) , the outer side of the housing (1) is provided with a rotary switch (2) and a lock head assembly (3) with one end extending into the lock housing (1), and the inner side of the housing (1) is provided with a The telescopic main tongue assembly (4) in the main tongue hole (101) and the main tongue return spring (11) capable of elastically restoring the main tongue assembly (4) are characterized in that the housing ( 1) There is a transmission fork (5) driven by the lock head assembly (3) and a toggle assembly ( 6), between the transmission fork (5) and the lock head assembly (3) is provided with a first clutch device (7) capable of receiving electrical signals to control the clutching of the two, the housing (1) A second clutch device (8) capable of being driven by the transmission fork (5) to clutch the toggle assembly (6) and the rotary switch (2) is provided. 2. A safe electronic anti-theft lock according to claim 1, characterized in that: the housing (1) is provided with an electric control assembly (9) capable of driving the second clutch device (8) , the electric control assembly (9) includes a main control circuit board, the fingerprint module (90) and the touch module (95) are arranged on the main control circuit board, and the housing (1) is also provided with There is a drive motor (91) controlled by the touch control module (95) to start and stop, and the motor shaft of the drive motor (91) is provided with a drive to rotate the second clutch device (8). turn the dial(92). 3. A safe electronic anti-theft lock according to claim 1, characterized in that: said lock assembly (3) comprises a lock shell (31) and a lock cylinder arranged in the lock shell (31) (32), one end of the transmission fork (5) is rotatably sleeved on the end of the lock shell (31) extending into the housing (1), and the lock cylinder (32) extends One end inserted into the casing (1) is provided with a paddle (33) that can rotate with the lock cylinder (32), and the first clutch device (7) includes a transmission fork (5) The first solenoid valve (71) on the top, the first solenoid valve (71) is provided with the first clutch plate (72) driven by it to expand and contract and can extend to the bottom of the plectrum (33), the After the first clutch plate (72) reaches below the dial (33), the dial (33) can move the first clutch plate (72) to drive the transmission fork (5) to rotate . 4. A safe electronic anti-theft lock according to claim 2, characterized in that: one end of the rotary switch (2) protruding into the housing (1) is provided with a knob that rotates with the rotary switch (2). The ratchet (21), the toggle assembly (6) includes a rotatable swivel seat (61) set in the housing (1) and a swivel seat (61) mounted on the swivel seat (61) Rotate and move the main tongue fork (62) retracted by the main tongue assembly (4), the said swivel seat (61) is provided with a clutch cavity (63), and the said ratchet (21) extends into the clutch cavity (63), the second clutch device (8) includes a second solenoid valve (81) on the rotary seat (61), and the second solenoid valve (81) is provided with It drives the second clutch (82) that stretches and extends into the clutch cavity (63) and extends to the ratchet side of the ratchet (21). The second electromagnetic valve (81) is provided with a touch Point (83), the second clutch device (8) also includes a sliding block ( 84), the sliding block (84) is provided with a touch guide slide (85) capable of pressing the touch point (83), the sliding block (84) and the housing (1) A sliding block return spring (86) capable of resetting the sliding block (84) is arranged between them. 5. A safe electronic anti-theft lock according to claim 1, characterized in that: the housing (1) is provided with a touch signal capable of sending an alarm signal on the side of the lock head assembly (3) device (12), the touch signal device (12) is provided with a touch shrapnel (13), and the lock assembly (3) is provided with a key that can be pushed and pressed when the key is inserted. Touch the lock cylinder rod (34) of the shrapnel (13). 6. A safe electronic anti-theft lock according to claim 1, characterized in that: said main tongue assembly (4) includes a main tongue plate (41) that is moved by said toggle assembly (6) and the main tongue (42) on the main tongue (41), the transmission gear (14) is hinged in the housing (1), and the main tongue (41) is provided with The main tongue teeth (43) engaged by the transmission gear (14), the housing (1) is also provided with a heaven and earth tongue plate (15), and the heaven and earth tongue plate (15) is provided with a heaven and earth tongue (16) and the heaven and earth tongue teeth (17) meshed with the transmission gear (14). 7. A safe electronic anti-theft lock according to claim 1, characterized in that: the lining board (10) is provided with a self-touch tongue hole (102), and the housing (1) is provided with A self-collision tongue (18) that can expand and contract from the self-collision tongue hole (102), and the housing (1) is provided with a The locking piece (20) of the main tongue assembly (4) can be locked, and one end is hinged in the housing (1) against the side of the self-button (18) and the other end is against the locking piece ( 20) on the linkage piece (19), when the self-touching tongue (18) moves into the housing (1), the linkage piece (19) is pushed to rotate to drive the lock piece (20) to move downward to unlock, and the The housing (1) is provided with a locking spring (28) that springs the locking piece (20) upward. 8. A safe electronic anti-theft lock according to claim 7, characterized in that: said locking piece (20) is provided with an inclined guide edge ( 201) and the lock hook (202) capable of locking the main tongue assembly (4). 9. A safe electronic anti-theft lock according to claim 1, characterized in that: the housing (1) is provided with an infrared induction alarm (93) capable of sensing infrared rays and emitting an alarm signal, and an infrared induction alarm (93) capable of sensing vibrations. And send the shock induction alarm (94) of warning signal. 10. A method for unlocking a safe electronic anti-theft lock as claimed in claim 2, characterized in that it comprises the following steps: a, fingerprint verification, press the finger print on the fingerprint module (90); b. Touch to select the unlocking mode. When the fingerprint matching in step a is correct, select the unlocking mode by manipulating the touch module (95). When selecting the password to unlock, proceed to step c1; when selecting the key to unlock, proceed to step c2; c1, input the password, after inputting the correct password by manipulating the touch module (95), control the drive motor (91) to start, so that the second clutch device (8) is clutched; c2. Key matching, after the key is selected to unlock, the main control circuit board sends a signal to the first clutch device (7) to make the first clutch device (7) act as a clutch, insert the key into the lock head assembly (3), and turn the key , the lock head assembly (3) will drive the transmission fork (5) to make the second clutch device (8) act on and off; d. The knob is unlocked. When the second clutch device (8) is in operation, turn the knob switch (2) to drive the toggle assembly (6) to retract the main tongue assembly (4) into the housing (1), and the lock body is locked. open.