CN212295962U

CN212295962U - Iron cabinet lock

Info

Publication number: CN212295962U
Application number: CN202020552713.XU
Authority: CN
Inventors: 黄日猛
Original assignee: Shenzhen Haiyueyun Technology Co ltd
Current assignee: Shenzhen Haiyueyun Technology Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-01-05
Anticipated expiration: 2030-04-15

Abstract

The embodiment of the utility model belongs to the technical field of lockset, in particular to an iron cabinet lock, which comprises a shell, a motor and a PCB board, a lock catch notch arranged in one side edge of the shell; further comprising: the transmission strip and the movable pin assembly are movably arranged in the rear shell; a bolt spring sleeved on the other end of the movable pin assembly; the spring bolt assembly is arranged in the rear shell and can rotate relative to the rear shell, and the spring bolt assembly is connected with the other end of the transmission strip; at least one elastic piece arranged in the rear shell and connected with the transmission strip for pushing the transmission strip to reset or connected with the lock tongue component for pushing the lock tongue component to reset; and the motor sleeve is connected with the motor output shaft and is used for pushing the movable pin assembly to be separated from the joint part on one end part of the transmission bar. Compared with the prior art, the installation the utility model discloses an express delivery cabinet of iron cabinet lock, the place of setting up of locker are unrestricted, convenient to use, and the energy consumption is low.

Description

Iron cabinet lock

Technical Field

The utility model belongs to the technical field of the tool to lock, especially, indicate an iron cabinet lock that is used for facilities such as express delivery cabinet, locker.

Background

Along with the rapid development of the e-commerce industry, the demand of logistics distribution is increasing, the express deliveries which need to be distributed by each courier are increasing, and due to the reasons of multiple aspects, the couriers are difficult to deliver each express to the hands of the addressees, so that some express deliveries are often required to be stored in an express delivery cabinet. In public places such as supermarket, the consumer is inconvenient to bring articles such as package, bag into it, often need leave these articles in the locker, no matter be express delivery cabinet or locker, each matter storage lattice can set up a cabinet lock, the cabinet lock accessible is swept the sign indicating number, input password or insert coins etc. and open, consequently, be provided with the PCB board in the cabinet lock, set up the electro-magnet on the PCB board, realize unblanking or locking through the electro-magnet, the electro-magnet is power consumptive more, consequently need external power supply, if adopt battery powered then there is inconvenience, consequently, this type of express delivery cabinet, the place of setting up of locker can receive the restriction.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide an iron cabinet lock, it can adopt external battery powered, installs the express delivery cabinet of this iron cabinet lock, the place that sets up of locker unrestricted, convenient to use. The technical scheme is as follows:

a lock for iron cabinet comprises a shell composed of a front shell and a rear shell, a motor and a PCB board arranged in the rear shell, and a lock catch arranged in one side edge of the shell for extending into a lock catch gap; further comprising:

the transmission bar and the movable pin component are movably arranged in the rear shell, and one end of the movable pin component is combined with or separated from a combining part arranged on one end part of the transmission bar;

the bolt spring is sleeved on the other end of the movable pin assembly and used for pushing the movable pin assembly to move towards the transmission bar, and the free end of the bolt spring is used as a supporting surface by one of the lower side plates on the rear shell;

the spring bolt assembly is arranged in the rear shell and can rotate relative to the rear shell, the spring bolt assembly is connected with the other end of the transmission strip, the spring bolt assembly can be pushed to rotate when the transmission strip translates, and the transmission strip can be driven to translate when the spring bolt assembly rotates;

at least one elastic piece arranged in the rear shell and connected with the transmission strip for pushing the transmission strip to reset or connected with the lock tongue component for pushing the lock tongue component to reset;

and the motor sleeve is connected with the motor output shaft and is used for pushing the movable pin assembly to be separated from the joint part on one end part of the transmission bar.

The PCB is connected with an external battery, and the components needing power consumption are mainly motors, so that the power of the motors is low, the power consumption is low, and the power is convenient to supply by using the battery; the above locking state is an initial state, at the moment, the lock catch extends into the shell through a lock catch notch in the shell to be connected with the lock tongue assembly, the cabinet door is locked, one end of the movable pin assembly is combined with a combining part on one end part of the transmission strip to limit the transmission strip to move horizontally, and the elastic piece deforms under stress; when the lock is unlocked, an instruction is sent out in a Bluetooth mode, a code scanning mode and the like, the motor drives the motor sleeve to rotate, the motor sleeve drives the movable pin component to move, the bolt spring is compressed, the movable pin component is separated from the transmission strip, the elastic component resets, if the elastic component is connected with the transmission strip, the transmission strip is driven to translate when the elastic component resets, the transmission strip is driven to rotate when translating, the lock tongue component is driven to rotate, one end of the lock tongue component, which is combined with the lock catch, rotates for a certain angle, and the lock catch is separated from the lock tongue component, so; if the elastic piece is connected with the spring bolt assembly, the elastic piece drives the spring bolt assembly to rotate when resetting, one end of the spring bolt assembly combined with the lock catch rotates for a certain angle to complete unlocking, and meanwhile, the spring bolt assembly drives the transmission strip to translate. When needing to lock, stretch into the hasp breach along the shell in with the hasp and combine together with spring bolt subassembly one end, the hasp promotes the spring bolt subassembly rotatory, and the spring bolt subassembly drives the transmission strip translation, and joint portion on the transmission strip removes to activity round pin subassembly department, and the bolt spring promotes the activity round pin subassembly and removes, and activity round pin subassembly one end combines together with the joint portion, and the transmission strip reachs extreme position, and the spring bolt subassembly stops rotatoryly, accomplishes the process of locking promptly.

Preferably, the transmission bar is a strip-shaped flat plate, a strip-shaped mounting hole is formed in the transmission bar, and two limiting holes are formed in two sides of the mounting hole respectively; the joint portion on the driving strip is a step portion, and a rack portion is arranged at the side edge of one end connected with the lock tongue assembly.

Preferably, the movable pin assembly is formed by integrally molding a limiting piece provided with an opening and a spring column arranged at one end of the limiting piece; the free end of the limiting piece is combined with or separated from the step part; the bolt spring is sleeved on the spring column.

Furthermore, a base plate is arranged on a lower side plate supporting the free end of the bolt spring on the rear shell, a gap communicated with each other is respectively arranged in the lower side plate and the base plate, the free end of the spring column can move in the gap, and the free end of the bolt spring is in contact with the surface of the base plate.

Preferably, the limiting piece is U-shaped, and the motor sleeve consists of a connecting cylinder connected with the output shaft of the motor and a convex strip arranged on the outer wall of the connecting cylinder; the motor sleeve is positioned in the limiting part, and when the motor sleeve rotates, the motor sleeve can drive the limiting part to be separated from the step part, and at the moment, the bolt spring is compressed.

Preferably, the bolt assembly is formed by integrally molding a gear part and a lock fork, and the gear part is combined with the rack part; the inner bottom surface of the rear shell is provided with a first rotating shaft perpendicular to the rear shell, and the gear part is sleeved on the first rotating shaft. The lock tongue component and the transmission strip are in transmission in a gear and rack mode.

But the distance of transmission strip translation and route need the restriction in the backshell, be equipped with two on the bottom surface of backshell with the backshell perpendicular and be located the spacing post of same height, two spacing holes overlap respectively and locate two spacing posts on, the transmission strip spacing post removal relatively.

Preferably, the number of the elastic parts is two, and the two elastic parts are respectively a return spring with one end connected with the transmission strip and the other end connected with the inner bottom surface of the rear shell, and a return torsion spring connected with the spring bolt assembly and the inner bottom surface of the rear shell.

The lock fork is formed by integrally molding a body, a long arm and a short arm, and the long arm is parallel to the short arm; the reset torsion spring is sleeved on the first rotating shaft, one claw part is fixedly connected with the rear shell, and the other claw part is connected with the free end of the long arm.

In order to install the reset spring, a reset spring column is arranged on the vertical face of the end part, close to the step part, of the strip-shaped installation hole, a baffle plate located in the strip-shaped installation hole is arranged on the bottom face of the rear shell, one end of the reset spring is connected with the reset spring column, and the end face of the other end of the reset spring is in contact with the baffle plate.

In order to debug the iron cabinet lock, the iron cabinet lock further comprises a mechanical switch which is arranged in the rear shell and is positioned on one side of the movable pin component, and the mechanical switch is formed by integrally forming a connecting cylinder, a transverse connecting strip and an oblique connecting strip; the limiting piece consists of a bottom plate, a side plate and a limiting piece, the spring column is arranged on the outer surface of the side plate, a through hole is formed in the bottom plate, and the end part of the transverse connecting strip extends into the through hole; a first upright post which is vertical to the rear shell is arranged on the inner bottom surface of the rear shell, the connecting cylinder is sleeved on the first upright post, and the mechanical switch can rotate relative to the first upright post; the end part of the shell is provided with a debugging hole, and the oblique connecting strip is exposed out of the debugging hole.

The beneficial technical effects are as follows: the PCB arranged in the shell is connected with an external battery, namely the external battery is adopted for supplying power, the motor is connected with the PCB, unlocking is realized through motor driving, and a low-power motor can meet the requirement, so that the power of the motor is low, the power consumption is low, and the battery can be adopted for supplying power; compared with the prior art, the installation the utility model discloses an express delivery cabinet of iron cabinet lock, the place of setting up of locker are unrestricted, convenient to use, and the energy consumption is low.

Drawings

FIG. 1 is an assembled view of the unlocked state of the embodiment of the present invention;

FIG. 2 is an exploded view of the unlocked state of the embodiment of the present invention;

fig. 3 is an internal structure view of an unlocked state according to the embodiment of the present invention;

fig. 4 is another perspective view of the internal structure of the unlocked state of the embodiment of the present invention;

fig. 5 is an exploded view of the locked state according to the embodiment of the present invention;

fig. 6 is an internal structure view of the locked state according to the embodiment of the present invention;

fig. 7 is another perspective view of the locked internal structure according to the embodiment of the present invention;

fig. 8 is a perspective view of a rear housing according to an embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1-8, an iron cabinet lock comprises a housing composed of a front housing 1 and a rear housing 2, a motor 3 and a PCB 4 disposed in the rear housing 2, and a lock catch 14 disposed in one side of the housing for extending into a lock catch gap 5; further comprising:

the transmission bar 6 is movably arranged in the rear shell 2, the transmission bar 6 is a strip-shaped flat plate, and a joint part 601 is arranged at the edge of one end part of the transmission bar 6; a strip-shaped mounting hole 602 is formed in the transmission strip 6, and two limiting holes 603 are formed in two sides of the mounting hole respectively; specifically, the joint 601 on the driving bar is a step, and a rack 604 is disposed at a side edge of the other end of the driving bar 6.

The movable pin assembly 7 is movably arranged in the rear shell 2, and the movable pin assembly 7 is formed by integrally forming a limiting part 701 provided with an opening and a spring post 702 arranged at one end of the limiting part; the free end of the limiting member 701 is combined with or separated from the step part; in this embodiment, during locking, the upper portion of the front end surface of the limiting member 701 contacts with the vertical surface of the step surface to limit the right movement of the transmission bar 6, which is the case that the combining portion 601 on the transmission bar is combined with the movable pin assembly 7; when the lock is unlocked, the motor 3 operates to drive the movable pin assembly 7 to move downwards, so that the upper part of the front end face of the limiting part 701 is completely separated from the vertical face of the step face, the movable pin assembly 7 is positioned below the transmission strip 6, and after the limitation of the movable pin assembly 7 is removed, the transmission strip 6 translates to the right for a certain distance to complete the unlocking, which is the condition that the joint part 601 on the transmission strip is separated from the movable pin assembly 7.

One end of a plug pin spring 8 arranged in the rear shell is sleeved on the other end of the movable pin component, namely sleeved on the spring column 702 and used for pushing the movable pin component 7 to move towards the transmission strip 6, and the free end of the plug pin spring 8 is used as a supporting surface for one lower side plate 201 on the rear shell 2; specifically, in order to support the free end of the bolt spring 8, a backing plate 9 is arranged on the inner surface of the lower side plate 201 supporting the free end of the bolt spring on the rear shell 2, the backing plate 9 and the lower side plate 201 are integrally formed, a gap 20 communicated with each other is respectively arranged in the lower side plate 201 and the backing plate 9, the free end of the spring column 702 can move in the gap, and the free end of the bolt spring 8 is in surface contact with the backing plate 9.

The lock tongue assembly 10 is arranged in the rear shell 2 and can rotate relative to the rear shell, the lock tongue assembly 10 is formed by integrally molding a gear part 1001 and a lock fork 1002, and the gear part 1001 is combined with a rack part 604 on a transmission bar; a first rotating shaft 11 perpendicular to the rear case is disposed on the bottom surface of the rear case 2, and the gear portion 1001 is sleeved on the first rotating shaft 11. That is, in this embodiment, the latch bolt assembly 10 and the driving strip 6 are driven by a rack and pinion manner, which is compact in structure, small in occupied space and high in efficiency.

The gear rack mode is adopted for transmission, the lock tongue assembly 10 can be pushed to rotate when the transmission bar 6 translates, and the transmission bar 6 can be driven to translate when the lock tongue assembly 10 rotates.

In this embodiment, in order to drive the locking bolt assembly 10 and the transmission bar 6 to reset in the unlocking process, two elastic members are arranged in the rear case 2, which are respectively a reset spring 12 with one end connected with the transmission bar 6 and the other end connected with the inner bottom surface of the rear case 2, and a reset torsion spring 13 connected with the locking bolt assembly 10 and the inner bottom surface of the rear case 2.

In order to mount the return spring 12, a return spring post 13 'is provided on the strip-shaped mounting hole 602 near the step portion, i.e., on the vertical surface of the end portion of the combining portion 601, a baffle 14' located in the strip-shaped mounting hole is provided on the inner bottom surface of the rear case 2, one end of the return spring 12 is connected to the return spring post 13 ', and the other end surface is in contact with the baffle 14'.

The lock fork 1002 is formed by integrally molding a body 1002a, a long arm 1002b and a short arm 1002c, wherein the long arm is parallel to the short arm; the main body of the reset torsion spring 13 is sleeved on the first rotating shaft 11, and one claw part is fixedly connected with the rear shell 2, and the other claw part is connected with the free end of the long arm 1002 b.

The return spring 12 is connected with the transmission bar 6 and used for pushing the transmission bar to return, and in the locked state, the limiting piece 701 is combined with the combining part 601 and pushes the transmission bar 6 to compress the return spring 12; one claw of the reset torsion spring 13 is fixedly connected with a long arm 1002b of the bolt assembly 10, and in the locked state, the limiting piece 701 is combined with the combining part 601, and the long arm 1002b presses the claw to deform.

It should be noted that, this embodiment discloses the condition that adopts two elastic components, be used for driving spring bolt subassembly 10 respectively, the driving strip 6 resets at the in-process of unblanking, but it is very obvious, adopt an elastic component, for example, only set up reset spring 12, at the in-process of locking compressed, when unblanking, locating part 701 on the movable pin subassembly breaks away from with the joint portion 601 on the driving strip, the resistance of restricting driving strip 6 translation right disappears, the elasticity of compressed reset spring 12 promotes driving strip 6 translation right, when driving strip 6 translation right, drive the gear portion rotation on spring bolt subassembly 10, and then drive the lock fork rotation, here, spring bolt subassembly clockwise rotation, after the lock fork rotates certain angle, can break away from with hasp 14, can accomplish the process of unblanking. Or only the return torsion spring 13 is arranged, and the achieved effect is the same as that of only the return spring 12. Therefore, it is easy for those skilled in the art to think and realize the technical solution using only one elastic member based on the present embodiment, and the detailed description is omitted here.

The reset spring 12 and the reset torsion spring 13 are respectively used for driving the bolt assembly 10 and the transmission bar 6 to reset in the unlocking process, the resetting process is stable, and the reliability is high.

In order to push the movable pin assembly 7 to move, a motor sleeve 15 connected with the output shaft of the motor is further included, and the motor sleeve 15 is connected with the movable pin assembly 7 and used for pushing the movable pin assembly to be separated from a joint part 601 on one end part of the transmission bar.

In order to install the motor sleeve 15, the limiting member 701 is U-shaped and has an opening, and the motor sleeve 15 is composed of a connecting cylinder 1501 connected with the output shaft of the motor and a convex strip 1502 arranged on the outer wall of the connecting cylinder, which are integrally formed; the motor sleeve 15 is located in the limiting member 701, and when the motor sleeve rotates, the limiting member 701 can be driven to disengage from the step portion, and at this time, the latch spring 8 is compressed.

The limiting member 701 is composed of a bottom plate 701a, a side plate 701b and a limiting block 701c, which are integrally formed, and the spring column 702 is disposed on the outer surface of the side plate. When the motor cover 15 rotates, the protruding strip 1502 rotates to the side plate 701b, pushing the side plate, i.e. the stopper 701, to move in the direction of disengaging from the coupling portion 601 until the stopper 701 disengages from the coupling portion 601, at which time the latch spring 8 is compressed by the side plate 701 b.

The distance and the path of the transmission strip 6 which can move in the rear shell 2 need to be limited, two limiting columns 16 which are perpendicular to the rear shell and are located at the same height are arranged on the bottom surface of the rear shell 2, two limiting holes 603 are respectively sleeved on the two limiting columns 16, and the transmission strip 6 can move relative to the limiting columns 16.

In order to debug the iron cabinet lock, the iron cabinet lock further comprises a mechanical switch 17 which is arranged in the rear shell 2 and is positioned at one side of the movable pin component 7, wherein the mechanical switch 17 is formed by integrally molding a connecting cylinder 1701, a transverse connecting strip 1702 and an oblique connecting strip 1703; a through hole 701d is formed in the bottom plate 701a, and the end of the transverse connecting bar 1702 extends into the through hole; a first upright post 18 vertical to the rear shell 2 is arranged on the bottom surface of the rear shell, the connecting cylinder 1701 is sleeved on the first upright post, and the mechanical switch 17 can rotate relative to the first upright post 18; the end of the housing is provided with a debugging hole 19, and the oblique connecting bar 1703 is exposed from the debugging hole.

The mechanical switch 17 is mainly used for debugging, and after the iron cabinet lock is installed, the mechanical switch 17 is hidden. If the above-mentioned lock state is an initial state, in this state, the limiting member 701 is combined with the combining portion 601, the driving bar 6 is limited to move rightwards, the return spring 12 is compressed, the claw portion of the return torsion spring 13 connected with the lock fork is deformed, at this time, the oblique connecting bar 1703 is pressed to move inwards the housing, the mechanical switch 17 can be pushed to rotate anticlockwise relative to the housing, the transverse connecting bar 1702 is contacted with the side plate 701b and presses the side plate 701b, the side plate is pushed, that is, the limiting member 701 moves towards the direction of disengaging from the combining portion 601, until the limiting member 701 disengages from the combining portion 601, and the debugging of unlocking can be completed.

The PCB 4 is connected with an external battery, and the components needing power consumption are mainly the motor 3, so that the power of the motor is low, the power consumption is low, and the battery is convenient to supply power; the above locking state is an initial state, at this time, the shackle 14 extends into the housing through the shackle notch 5 in the housing to be connected with the lock fork 1002 on the lock tongue assembly 10, the cabinet door is locked, one end of the movable pin assembly 7 is combined with the combining part 601 on one end part of the transmission strip, i.e., the upper end of the limiting part 701 is combined with the combining part 601 to limit the translation of the transmission strip 6, the elastic part is stressed and deformed, in this embodiment, the return spring 12 is compressed, and the claw part connected with the lock fork 1002 on the return torsion spring 13 is extruded and deformed; when unblanking, through the bluetooth, sweep modes such as sign indicating number and send the instruction, motor 3 drives motor cover 15 rotation, sand grip 1502 extrusion locating part 701 on the motor cover, and then drive the movable round pin subassembly and remove to the direction of keeping away from joint portion 601 on the drive strip, bolt spring 8 is compressed, movable round pin subassembly 7 breaks away from with drive strip 6, locating part 701 breaks away from with joint portion 601 promptly, reset spring 12, reset torsion spring 13 resets, drive strip 6 translation right when reset spring 12 resets, meanwhile, it is rotatory to drive spring bolt subassembly 10 when reset torsion spring 13 resets, at reset

spring

12, 13 combined action of reset torsion spring down, the rotatory certain angle of lock fork 1002 on the spring bolt subassembly 10, the lock fork 1002 on hasp 14 and the spring bolt subassembly breaks away from, accomplish promptly and unblank. When locking is needed, the lock catch 14 extends into the lock fork 1002 on the lock tongue assembly along the lock catch notch 5 in the shell to be combined, the lock catch 14 pushes the lock tongue assembly 10 to rotate, the lock tongue assembly 10 drives the transmission strip 6 to move horizontally, the joint part 601 on the transmission strip 6 moves to the position of the limiting part 701 on the movable pin assembly 7, the bolt spring 8 pushes the movable pin assembly 7 to move towards the transmission strip 6, the movable pin assembly, namely the free end of the limiting part 701 is combined with the joint part 601, the transmission strip 6 reaches the limit position, the lock tongue assembly 10 stops rotating, and the locking process is completed.

It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all embodiments, and that the appended drawings illustrate preferred embodiments of the present invention, but do not limit the scope of the invention. The present invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.

Claims

1. A lock for iron cabinet comprises a shell composed of a front shell and a rear shell, a motor and a PCB board arranged in the rear shell, and a lock catch notch arranged in one side edge of the shell for a lock catch to extend into; it is characterized by also comprising:

2. The iron cabinet lock as claimed in claim 1, wherein the driving bar is a bar-shaped plate having a bar-shaped mounting hole therein, and a limiting hole is provided at each of both sides of the mounting hole; the joint portion on the driving strip is a step portion, and a rack portion is arranged at the side edge of one end connected with the lock tongue assembly.

3. The iron cabinet lock as claimed in claim 2, wherein the movable pin assembly is integrally formed by a limiting member having an opening, and a spring post provided at one end of the limiting member; the free end of the limiting piece is combined with or separated from the step part; the bolt spring is sleeved on the spring column.

4. A cabinet lock according to claim 3, wherein the rear housing has a backing plate on the lower panel supporting the free end of the bolt spring, the lower panel and backing plate each having an interconnected gap therein, the free end of the spring post being movable within the gap, the free end of the bolt spring contacting the surface of the backing plate.

5. The iron cabinet lock as claimed in claim 3, wherein the position-limiting member is U-shaped, and the motor sleeve is composed of a connecting cylinder connected with the output shaft of the motor and a convex strip arranged on the outer wall of the connecting cylinder; the motor sleeve is positioned in the limiting part, and when the motor sleeve rotates, the motor sleeve can drive the limiting part to be separated from the step part, and at the moment, the bolt spring is compressed.

6. The iron cabinet lock as claimed in claim 2, wherein the latch bolt assembly is formed by integrally molding a gear portion and a lock fork, the gear portion being combined with the rack portion; the inner bottom surface of the rear shell is provided with a first rotating shaft perpendicular to the rear shell, and the gear part is sleeved on the first rotating shaft.

7. The iron cabinet lock as claimed in claim 2, wherein two position-limiting posts are provided on the bottom surface of the rear housing, the two position-limiting posts are perpendicular to the rear housing and are located at the same height, the two position-limiting holes are respectively disposed on the two position-limiting posts, and the driving bar is movable relative to the position-limiting posts.

8. The iron cabinet lock as claimed in claim 6, wherein the two elastic members are a return spring having one end connected to the driving bar and the other end connected to the inner bottom surface of the rear case, and a return torsion spring connected to the latch bolt assembly and the inner bottom surface of the rear case.

9. The iron cabinet lock as claimed in claim 8, wherein the fork is formed by integrally forming a body, a long arm and a short arm, the long arm being parallel to the short arm; the reset torsion spring is sleeved on the first rotating shaft, one claw part is fixedly connected with the rear shell, and the other claw part is connected with the free end of the long arm.

10. The iron cabinet lock as claimed in claim 8, wherein a return spring post is provided on a vertical surface of an end portion of the strip-shaped mounting hole near the step portion, a baffle plate located in the strip-shaped mounting hole is provided on an inner bottom surface of the rear case, one end of the return spring is connected to the return spring post, and the other end surface of the return spring is in contact with the baffle plate.

11. The iron cabinet lock according to claim 3, further comprising a mechanical switch disposed in the rear case at one side of the movable pin assembly, wherein the mechanical switch is integrally formed by the connecting cylinder, the transverse connecting bar and the diagonal connecting bar; the limiting piece consists of a bottom plate, a side plate and a limiting piece, the spring column is arranged on the outer surface of the side plate, a through hole is formed in the bottom plate, and the end part of the transverse connecting strip extends into the through hole; a first upright post which is vertical to the rear shell is arranged on the inner bottom surface of the rear shell, the connecting cylinder is sleeved on the first upright post, and the mechanical switch can rotate relative to the first upright post; the end part of the shell is provided with a debugging hole, and the oblique connecting strip is exposed out of the debugging hole.