CN117846424A - Safety electronic lock - Google Patents

Abstract

The invention belongs to the technical field of electronic locks, and in particular relates to a safe electronic lock which comprises a lock box, a columnar body, a lock cylinder, a lock tongue, an electronic control device, a fingerprint identification module and an alarm component; the lock tongue is connected to the inside of the lock box, and one end of the lock tongue can extend through the side end of the lock box; the electronic control device is connected to the inside of the lock box and is connected with the lock tongue; the fingerprint identification module is connected to the lock box and is electrically connected with the electronic control device; the columnar body is connected with the lock box; the lock cylinder is connected to the inside of the columnar body and connected with the lock tongue; the alarm part comprises a humidity sensor which is connected to the inside of the columnar body and used for detecting the humidity value in the lock cylinder. The invention can improve the safety performance and stability of use.

Description

Safety electronic lock

Technical Field

The invention belongs to the technical field of electronic locks, and particularly relates to a safe electronic lock.

Background

In the field of safety technical precaution, the electronic coded lock with the anti-theft alarm function replaces the traditional mechanical coded lock, overcomes the defects of small coded quantity and poor safety performance of the mechanical coded lock, and greatly improves the technical performance of the coded lock by one step. The electronic lock takes a singlechip as a core and is matched with a corresponding hardware circuit to finish the functions of setting, storing, identifying and displaying passwords, driving an electromagnetic actuator, detecting the driving current value of the electromagnetic actuator, receiving alarm signals sent by a sensor, sending data and the like.

However, most of the existing electronic locks are poor in practicality, and the lock cylinders in the existing electronic locks are easily corroded by liquid for a long time, so that the internal structures are damaged due to untimely cleaning, and the structural stability and the use safety of the electronic locks are poor.

Disclosure of Invention

The invention aims at: aiming at the defects of the prior art, the safe electronic lock is provided, and aims to improve the safety performance and stability of use.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a secure electronic lock, characterized in that: the lock comprises a lock box, a columnar body, a lock cylinder, a lock tongue, an electronic control device, a fingerprint identification module and an alarm component; the lock tongue is connected to the inside of the lock box, and one end of the lock tongue can extend through the side end of the lock box; the electronic control device is connected to the inside of the lock box and is connected with the lock tongue; the fingerprint identification module is connected to the lock box and is electrically connected with the electronic control device; the columnar body is connected with the lock box; the lock cylinder is connected to the inside of the columnar body and connected with the lock tongue; the alarm part comprises a humidity sensor which is connected to the inside of the columnar body and used for detecting the humidity value in the lock cylinder.

Preferably: the columnar body comprises a column body and a sealing block; one end of the cylinder is connected with one side end of the lock box; and a first inner cavity is arranged in the column body; the lock cylinder is connected with the first inner cavity and extends to the inside of the lock box; the sealing block is connected to the opening of the first inner cavity in a sealing mode.

Preferably: a first limit groove is formed in the column body; the first limiting groove is communicated with a key inner cavity of the lock cylinder; the humidity sensor is connected to the inside of the first limit groove; a first limiting block is arranged on the sealing block; the first limiting block is connected to the inner portion of the first limiting groove.

Preferably: the safety electronic lock further comprises a warning component; the warning component comprises a first connecting wire, a warning lamp and a second connecting wire; the warning lamp is connected to the lock box; one end of the first connecting wire and one end of the second connecting wire are respectively communicated with the warning lamp; the other end of the first connecting wire and the other end of the second connecting wire are respectively arranged in the first limiting groove;

when the sealing block is assembled in the first limiting groove, the other end of the first connecting wire and the other end of the second connecting wire are in an open circuit state; when the sealing block is detached and separated from the first limiting groove, the other end of the first connecting wire and the other end of the second connecting wire are in a conducting state.

Preferably: the side end of the lock cylinder is provided with a first through hole; the first through hole is communicated with the key inner cavity; the column body is also provided with a second through hole corresponding to the first through hole; and the second through hole is communicated with the first limit groove.

Preferably: the lock box comprises a shell and a cover body which can be mutually detached; the fingerprint identification module, the lock cylinder, the columnar body, the alarm component and the warning component are respectively connected with the cover body; the lock tongue and the electronic control device are respectively connected in the shell.

Preferably: the bottom of the lock cylinder is provided with a connecting part; the connecting part is movably connected with the lock tongue so that the lock tongue passes through the lock box or is retracted into the lock box.

Preferably: the connecting component comprises a connecting column and a connecting block; one end of the connecting column is connected to the bottom of the lock cylinder; the other end of the connecting column is connected with the connecting block; the connecting block can push the lock tongue to pass through the lock box or retract into the lock box.

Preferably: an elastic part is arranged at one end of the lock tongue; the elastic component is connected to the electronic control device.

Preferably: the electronic control device comprises a driving motor, a main gear, a pinion, a driven screw and a sliding block; the driving motor is connected in the lock box and is connected with the main gear; the main gear and the auxiliary gear are connected with each other in a transmission way; and the main gear and the auxiliary gear are connected in the lock box; one end of the driven screw is connected with the pinion; the other end of the driven screw rod is movably connected in the lock box; the middle part of the sliding block is connected to the outer surface of the driven screw rod; the side end of the sliding block is connected with the lock tongue.

The lock cylinder has the beneficial effects that the technical scheme monitors the standby lock cylinder by adopting the humidity sensor, and when someone deliberately or naturally seeps water, the lock cylinder can be timely reminded and cleaned, so that other parts in the lock box are prevented from being damaged, and the use safety performance and stability are improved; the identity of a user is sensed and identified through the fingerprint identification module, so that the electronic lock can be opened without a key, and the use safety of the electronic lock can be improved; besides, the effect of opening the electronic lock in a multi-mode function can be achieved by taking the lock cylinder in the columnar body as a standby starting function, and therefore the use safety performance of the electronic lock is improved.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to fig. 1 to 4.

FIG. 1 is a schematic diagram of a security electronic lock according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a cover of a secure electronic lock according to an embodiment of the present invention;

FIG. 3 is a partially enlarged view of a cover of a security electronic lock according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a housing of a security electronic lock according to an embodiment of the invention.

In the figure: 1-a lock box; 11-a housing; 12-a cover; 2-a columnar body; 21-column; 2101-a second through hole; 211-a second limit groove; 212-a discharge through hole; 213-a first limit groove; 22-sealing blocks; 221-a second limiting block; 222-a first limiting block; 2221-arcuate bumps; 2222-separator sheet; 3-a lock cylinder; 301-a first through hole; 31-a connecting part; 311-connecting columns; 312-connecting blocks; 4-a lock tongue; 41-an elastic member; 42-mounting a boss; 5-a fingerprint identification module; 6-warning components; 61-warning lamps; 62-first connecting wires; 621-a first metal dome; 622-first connection spring; 63-a second connecting wire; 631-a second metal spring; 632-a second connecting spring; 7-an alarm part; 71-alarm sound; 72-humidity sensor; 8-electronic control means; 81-driving a motor; 82-a main gear; 83-pinion gear; 84-driven screw; 85-sliding blocks; 9-main control unit.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely a kind of association relation of the security electronic lock description association object, which means that three kinds of relations may exist, for example, a and/or B may mean that: a alone, both a and B, and a plurality of cases alone. In addition, the character "/" herein generally indicates that the front-rear associated object is a secure electronic lock or.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The present invention will be described in further detail with reference to fig. 1 to 4, but the present invention is not limited thereto.

As shown in fig. 1 and 2 and 4, in one embodiment of the present invention, the secure electronic lock; the lock comprises a lock box 1, a columnar body 2, a lock cylinder 3, a lock tongue 4, an electronic control device 8, a fingerprint identification module 5 and an alarm component 7; the lock tongue 4 is connected to the inside of the lock case 1, and one end of the lock tongue 4 may extend through a side end of the lock case 1; the electronic control device 8 is connected to the inside of the lock box 1 and connected to the lock tongue 4 so that the lock tongue 4 passes through the lock box 1 or is retracted to the inside of the lock box 1; the fingerprint identification module 5 is connected to the lock box 1 and is electrically connected with the electronic control device 8; the columnar body 2 is connected with the lock box 1; the lock cylinder 3 is connected to the inside of the column body 2 and connected to the lock tongue 4 so that the lock tongue 4 passes through the lock box 1 or is retracted to the inside of the lock box 1; the alarm means 7 comprise a humidity sensor 72, which humidity sensor 72 is connected to the inside of the cylinder 2 and is adapted to detect a humidity value inside the lock cylinder 3.

According to the technical scheme, the humidity sensor is adopted to monitor the standby lock cylinder, so that when someone deliberately or naturally seeps water, the standby lock cylinder can be timely reminded and cleaned, other parts in the lock box are prevented from being damaged, and the use safety performance and stability are improved; the identity of a user is sensed and identified through the fingerprint identification module, so that the electronic lock can be opened without a key, and the use safety of the electronic lock can be improved; besides, the effect of opening the electronic lock in a multi-mode function can be achieved by taking the lock cylinder in the columnar body as a standby starting function, and therefore the use safety performance of the electronic lock is improved.

The lock core 3 is a main part for controlling the unlocking of the lock, is a heart of the lock, and is a core part which can rotate and drive the lock bolt to move in cooperation with a key. The cylinder liner in the lock core 3 is internally provided with a precise number marble and a special-shaped marble structure.

Specifically, in some embodiments, as shown in fig. 1 and 2, the alarm component 7 further includes an alarm sound 71; the alarm sound 71 is connected to the lock case 1 and electrically connected to the humidity sensor 72 via a third connection wire. That is, the humidity sensor 72 is provided with the maximum warning humidity value, and when the maximum warning humidity value is reached, the alarm sound 71 is started to achieve the rapid alarm function, so that the maintenance and repair speed is increased, and the use safety is improved.

Specifically, in some embodiments, as shown in fig. 1 and 2, the column body 2 includes a column body 21 and a sealing block 22; one end of the cylinder 21 is connected to one side end of the lock case 1; and a first inner cavity is arranged in the column body 21; the lock cylinder 3 is connected to the first inner cavity and extends to the inside of the lock box 1; the sealing block 22 is connected to the opening of the first inner cavity in a sealing way. The structure can realize the sealing and placing of the lock cylinder 3 when the lock cylinder 3 which does not need the standby function is in sealing assembly through the sealing block 22, thereby reducing the damage effect of the outside on the locking 3 and improving the use safety.

Specifically, in some embodiments, as shown in fig. 2 and 3, a first limiting groove 213 is provided in the column 21; the first limiting groove 213 is communicated with a key inner cavity of the lock cylinder 3; and the humidity sensor 72 is connected to the inside of the first limiting groove 213; a first limiting block 222 is arranged on the sealing block 22; the first limiting block 222 is connected to the inside of the first limiting groove 213. This structure can also detect the humidity condition of key inner chamber fast through first spacing recess 213 when guaranteeing the normal use of lock core, avoids suffering corruption or destruction, and then improves the security of using.

Specifically, in some embodiments, as shown in fig. 2, at least one discharge through hole 212 is provided on the column 21; the first stopper 222 is provided with an arc-shaped projection 2221 corresponding to the discharge through hole 212. Wherein, as shown in fig. 2, the discharge through hole 212 is located at the bottom of the column 21; and the number of the discharge through holes 212 corresponds to the number of the first stoppers 222; the structure can realize that a corresponding arc-shaped projection 2221 is arranged on a first limiting block 222; the arc-shaped projection 2221 seals the drain through hole 212. When the sealing block 22 is detached from the cylinder 21, the arc-shaped projection 2221 can be drawn out from the discharge through hole 212 to realize communication of the discharge through hole 212, the first limiting groove 213, the key inner cavity and the outside; thereby achieving the purpose of discharging liquid and further improving the use safety.

Specifically, in some embodiments, as shown in fig. 2 and 3, a side end of the lock cylinder 3 is provided with a first through hole 301; the first through hole 301 is communicated with the key inner cavity; the column 21 is further provided with a second through hole 2101 corresponding to the first through hole 301; and the second through hole 2101 communicates with the first limit groove 213.

Specifically, in some embodiments, as shown in fig. 2, a second limiting block 221 is further disposed at a side end of the sealing block; a second limiting groove 211 corresponding to the second limiting block 221 is further provided in the column 21. Wherein, the second limiting groove 211 is located above the first limiting groove 213. The structure can further ensure the assembly stability of the sealing block 22 through the double limiting actions of the first limiting block 222 and the second limiting block 221; thereby improving the safety of use.

Specifically, in some embodiments, as shown in fig. 1 and 2, the secure electronic lock further includes a warning component 6; the warning part 6 comprises a first connecting wire 62, a warning lamp 61 and a second connecting wire 63; the warning lamp 61 is connected to the lock box 1; one end of the first connecting wire 62 and one end of the second connecting wire 63 are respectively communicated with the warning lamp 61; the other end of the first connecting wire 62 and the other end of the second connecting wire 63 are respectively disposed in the first limiting groove 213; and when the sealing block 22 is fitted in the first limiting groove 213, the other end of the first connecting wire 62 and the other end of the second connecting wire 63 are in an open state; when the sealing block 22 is detached from the first limiting groove 213, the other end of the first connecting wire 62 and the other end of the second connecting wire 63 are in a conductive state. In some embodiments, as shown in fig. 2 and 3, the other end of the first connecting wire 62 is provided with a first metal elastic sheet 621; one end of the first metal elastic piece 621 is elastically connected to the inner wall of the first limiting groove 213; the other end of the second connecting wire 63 is provided with a second metal elastic sheet 631; one end of the second metal elastic piece 631 is elastically connected to the inner wall of the first limiting groove 213; and a separation sheet 2222 is arranged at one end of the first limiting block 222; the separation piece 2222 is respectively abutted against the first metal elastic piece 621 and the second metal elastic piece 631. Further, a first connecting spring 622 is disposed at one end of the first metal elastic piece 621; one end of the first connecting spring 622 is connected to the inner wall of the first limiting groove 213; a second connection spring 632 is arranged at one end of the second metal elastic sheet 631; one end of the second connecting spring 632 is connected to the inner wall of the first limiting groove 213. That is, when the spare key cylinder 3 is not required to be used, the sealing block 22 is inserted at one end of the cylinder 21; and the separation sheet 2222 separates the first metal elastic sheet 621 from the second metal elastic sheet 631, so as to achieve the open circuit state of the circuit, i.e. the warning lamp 61 is turned off; when the standby lock cylinder 3 is needed, the sealing block 22 is pulled out from one end of the cylinder 21, and the separation sheet 2222 is pulled out from between the first metal elastic sheet 621 and the second metal elastic sheet 631, so that the first metal elastic sheet 621 and the second metal elastic sheet 631 are in abutting connection, and the normal running state of the circuit is achieved, namely the warning lamp 61 is turned on; and meanwhile, the background management terminal is reminded that the electronic lock is in a standby state or is forcedly used in the standby state, so that an administrator is reminded to verify, and the use safety of the electronic lock is ensured. As shown in fig. 3, an arc-shaped first tilting is disposed at an end of the first metal elastic sheet 621 away from the first connecting wire 62; an arc-shaped second tilting is arranged at one end of the second metal elastic sheet 631 away from the second electric wire 62; the first tilting is bent in a direction away from the second tilting; the second tilting is bent in a direction away from the first tilting; thereby improving the order and fluency of the penetration or extraction of the separation sheet 2222.

Specifically, in some embodiments, as shown in fig. 1, the lock case 1 includes a housing 11 and a cover 12 that are detachably disposed with each other; the fingerprint identification module 5, the lock cylinder 3, the columnar body 2, the alarm component 7 and the warning component 6 are respectively connected to the cover 12; the lock tongue 4 and the electronic control device 8 are respectively connected in the shell 11.

Specifically, in some embodiments, as shown in fig. 1 and 4, the bottom of the lock cylinder 3 is provided with a connecting member 31; the connecting part 31 is movably connected with the lock tongue 4, so that the lock tongue 4 passes through the lock box 1 or is retracted into the lock box 1. Wherein, as shown in fig. 4, the connection member 31 includes a connection post 311 and a connection block 312; one end of the connecting column 311 is connected to the bottom of the lock cylinder 3; the other end of the connecting column 311 is connected to the connecting block 312; the connection block 312 may push the locking tongue 4 through the lock case 1 or retract to the inside of the lock case 1. Further, the side end of the lock tongue 4 is provided with an installation convex part 42; the connection block 312 may be push-connected with the mounting boss 42. That is, when the corresponding key is used, the lock cylinder 3 rotates the connecting post 311, so as to drive the connecting block 312 to rotate, so that the connecting block 312 pushes the lock tongue 4 to pass through the lock box 1 or retract into the lock box 1.

As shown in fig. 4, one end of the lock tongue 4 is provided with an elastic component 41; the elastic member 41 is connected to the electronic control device 8. That is, the spring element 41 ensures that the locking tongue 4 can be quickly and automatically reset; and can also realize the assembly stability with lock core 3 and electronic control device 8 simultaneously, and then improve the compactibility of structure, ensure the security of using.

Specifically, in some embodiments, as shown in fig. 1 and 4, the electronic control device 8 includes a driving motor 81, a main gear 82, a sub gear 83, a driven screw 84, and a slider 85; the driving motor 81 is connected to the lock case 1 and connected to the main gear 82; the main gear 82 and the auxiliary gear 83 are connected in a transmission manner; and the main gear 82 and the sub gear 83 are connected in the lock case 1; one end of the driven screw 84 is connected to the pinion 83; the other end of the driven screw 84 is movably connected in the lock box 1; the middle part of the sliding block 85 is connected to the outer surface of the driven screw 84; the side end of the slide block 85 is connected to the tongue 4 (elastic member 41). That is, the driven screw 84 is rotated by the rotation of the pinion 83 to reciprocate the sliding block 85 on the outer surface of the driven screw 84, thereby driving the locking bolt 4 to pass through the lock case 1 or to retract into the inside of the lock case 1.

In particular, in some embodiments, as shown in fig. 1 and 4, the secure electronic lock further comprises a main control unit 9; the main control unit 9 is connected to the inside of the lock case 1; and the electronic control device 8, the fingerprint recognition module 5, the warning unit 6 and the alarm unit 7 are electrically connected with the main control unit 9, respectively. Wherein the main control unit 9 is a control chip or the like; and the control chip is electrically connected with the background management terminal.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the embodiments of the disclosure may be suitably combined to form other embodiments as will be understood by those skilled in the art.

Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.

Claims (10)

1. A secure electronic lock, characterized in that: the lock comprises a lock box, a columnar body, a lock cylinder, a lock tongue, an electronic control device, a fingerprint identification module and an alarm component; the lock tongue is connected to the inside of the lock box, and one end of the lock tongue can extend through the side end of the lock box; the electronic control device is connected to the inside of the lock box and is connected with the lock tongue; the fingerprint identification module is connected to the lock box and is electrically connected with the electronic control device; the columnar body is connected with the lock box; the lock cylinder is connected to the inside of the columnar body and connected with the lock tongue; the alarm part comprises a humidity sensor which is connected to the inside of the columnar body and used for detecting the humidity value in the lock cylinder.

2. The secure electronic lock of claim 1, wherein: the columnar body comprises a column body and a sealing block; one end of the cylinder is connected with one side end of the lock box; and a first inner cavity is arranged in the column body; the lock cylinder is connected with the first inner cavity and extends to the inside of the lock box; the sealing block is connected to the opening of the first inner cavity in a sealing mode.

3. The secure electronic lock of claim 2, wherein: a first limit groove is formed in the column body; the first limiting groove is communicated with a key inner cavity of the lock cylinder; the humidity sensor is connected to the inside of the first limit groove; a first limiting block is arranged on the sealing block; the first limiting block is connected to the inner portion of the first limiting groove.

4. A secure electronic lock as defined in claim 3, wherein: the safety electronic lock further comprises a warning component; the warning component comprises a first connecting wire, a warning lamp and a second connecting wire; the warning lamp is connected to the lock box; one end of the first connecting wire and one end of the second connecting wire are respectively communicated with the warning lamp; the other end of the first connecting wire and the other end of the second connecting wire are respectively arranged in the first limiting groove;

when the sealing block is assembled in the first limiting groove, the other end of the first connecting wire and the other end of the second connecting wire are in an open circuit state; when the sealing block is detached and separated from the first limiting groove, the other end of the first connecting wire and the other end of the second connecting wire are in a conducting state.

5. The secure electronic lock of claim 3 or 4, wherein: the side end of the lock cylinder is provided with a first through hole; the first through hole is communicated with the key inner cavity; the column body is also provided with a second through hole corresponding to the first through hole; and the second through hole is communicated with the first limit groove.

6. The secure electronic lock of claim 1, wherein: the lock box comprises a shell and a cover body which can be mutually detached; the fingerprint identification module, the lock cylinder, the columnar body, the alarm component and the warning component are respectively connected with the cover body; the lock tongue and the electronic control device are respectively connected in the shell.

7. The secure electronic lock of claim 1, wherein: the bottom of the lock cylinder is provided with a connecting part; the connecting part is movably connected with the lock tongue so that the lock tongue passes through the lock box or is retracted into the lock box.

8. The secure electronic lock of claim 7, wherein: the connecting component comprises a connecting column and a connecting block; one end of the connecting column is connected to the bottom of the lock cylinder; the other end of the connecting column is connected with the connecting block; the connecting block can push the lock tongue to pass through the lock box or retract into the lock box.

9. The secure electronic lock of claim 1, wherein: an elastic part is arranged at one end of the lock tongue; the elastic component is connected to the electronic control device.

10. The secure electronic lock of claim 1 or 9, wherein: the electronic control device comprises a driving motor, a main gear, a pinion, a driven screw and a sliding block; the driving motor is connected in the lock box and is connected with the main gear; the main gear and the auxiliary gear are connected with each other in a transmission way; and the main gear and the auxiliary gear are connected in the lock box; one end of the driven screw is connected with the pinion; the other end of the driven screw rod is movably connected in the lock box; the middle part of the sliding block is connected to the outer surface of the driven screw rod; the side end of the sliding block is connected with the lock tongue.