Efficient and reliable subway passenger room electric appliance cabinet cover plate locking device

Abstract

The utility model provides an efficient and reliable subway passenger room electric appliance cabinet cover plate locking device, and relates to the field of rail transit. Comprising an outer frame, a lock cylinder assembly and a spring bolt assembly, and a lock connector is formed in the end, close to the magnetic lock box, of the outer frame; the lock cylinder assembly perpendicularly penetrates through the end, away from the magnetic lock box, of the outer frame, a key hole matched with a key is formed in one end of the lock cylinder assembly, and an unlocking part is arranged on the side wall of the lock cylinder assembly. The spring bolt assembly is arranged in the outer frame, an unlocking groove connected with the unlocking part in an inserted mode is formed in the side wall of the spring bolt assembly, and one end of the spring bolt assembly can be magnetically attracted to the magnetic lock box. During locking, one end of the spring bolt assembly penetrates through the locking port and is magnetically attracted with the magnetic lock box; during unlocking, after a key is inserted into the key hole, the lock cylinder assembly is rotated, the unlocking part drives the spring bolt assembly to move towards the end away from the magnetic lock box, and the spring bolt assembly is separated from the magnetic lock box. The cover plate locking device is high in reliability, and fault conditions are reduced.

Description

Technical Field

[0001] This utility model relates to the field of rail transit, and more specifically, to a highly efficient and reliable locking device for the cover of an electrical cabinet in a subway passenger compartment. Background Technology

[0002] In recent years, with rapid economic development and accelerated urbanization, people have increasingly favored fast, efficient, and high-capacity urban rail transit. Among them, the subway, which is comfortable, punctual, has a large capacity and is unaffected by weather, has become a common mode of transportation for citizens. Therefore, the reliability and safety of subway vehicles are particularly important.

[0003] The interior system is the system that passengers directly perceive after entering the vehicle. It has a direct connection with passengers and not only has a significant impact on vehicle operation, but is also related to passenger safety. If the electrical cabinet cover lock in the passenger compartment is not restored and the vehicle is put into operation on the main line, it is easy to cause significant safety hazards, resulting in a major impact and seriously affecting the safe operation of the train.

[0004] Currently, most subway lines in China use mechanical structures for passenger compartment cover latches. During installation, the latch is threaded onto the cover, and a square-hole key is used to turn and open / close the cover. While this design offers advantages such as simplicity and high strength, frequent opening of the electrical cabinet cover for maintenance checks can cause the lock cylinder to jam or strip due to excessive force, leading to greater wear and tear and an increased failure rate of the internal system latches. Furthermore, forgetting to lock the electrical cabinet cover after maintenance can pose a significant safety hazard when the line is put back into service.

[0005] Therefore, there is an urgent need for a locking device that automatically locks the electrical cabinet cover in the passenger compartment by pushing it up, in order to further improve the reliability of vehicle operation. Utility Model Content

[0006] The purpose of this utility model is to provide a highly efficient and reliable locking device for the cover of the electrical cabinet in a subway passenger compartment. It can automatically lock when the passenger compartment cover is pushed up, making the opening and closing of the cover more convenient and quick. It can be unlocked with a key, which can reduce the occurrence of jamming or stripping of the latch when the latch is frequently operated.

[0007] The embodiments of this utility model are implemented as follows:

[0008] This application provides a highly efficient and reliable locking device for the cover of an electrical cabinet in a subway passenger compartment, including a lock body, a magnetic lock box, and a key that are adapted for locking.

[0009] The lock body includes an outer frame, a lock cylinder assembly, and a bolt assembly. The outer frame has a lock interface at one end near the magnetic lock box. The lock cylinder assembly is fixed to a cover plate and vertically extends through the outer frame at the end furthest from the magnetic lock box. The end of the lock cylinder assembly near the cover plate has a keyhole adapted to the key, and the side wall of the lock cylinder assembly has an unlocking part. The bolt assembly is located inside the outer frame, and its side wall has an unlocking groove for insertion into the unlocking part. The end of the bolt assembly furthest from the lock cylinder assembly can magnetically attract the magnetic lock box.

[0010] When locking, one end of the bolt assembly passes through the lock interface and magnetically attracts the magnetic lock box; when unlocking, after the key is inserted into the keyhole, the lock cylinder assembly is rotated, and the unlocking part drives the bolt assembly to move toward the end away from the magnetic lock box, so that the bolt assembly separates from the magnetic lock box.

[0011] Furthermore, based on the aforementioned solution, the lock cylinder assembly includes a lock cylinder and a lock block.

[0012] The lock cylinder is fixed to the cover plate, and part of it rotates through the inside of the outer frame and is integrally connected to the keyhole;

[0013] The lock block is located inside the outer frame and sleeved on the outside of the lock cylinder; one side of the outer wall of the lock block protrudes outward to form the unlocking part.

[0014] Furthermore, based on the aforementioned scheme, the lock cylinder includes a lock base, a first square portion, a second square portion, and a threaded portion arranged sequentially along its axis.

[0015] The lock seat is fixedly connected to the first square portion, wherein the lock seat is fixed to the outside of the cover plate, and the first square portion is inserted through and fixed to the cover plate;

[0016] The second square portion passes sequentially through the first square portion and the lock base via a pivot and is integrally connected to the keyhole; wherein, the lock block is sleeved on the outside of the second square portion;

[0017] The threaded part is fixedly connected to the second square part and passes through the other side of the outer frame before being limited and fixed by a limiting member.

[0018] Furthermore, based on the aforementioned solution, the latch assembly includes a latch connector and a latch.

[0019] The latch connector is U-shaped and slides within the outer frame; the latch connector has an unlocking groove on the side near the lock block, and the unlocking part is movably inserted into the unlocking groove;

[0020] The latch is fixedly connected to the closed end of the latch connector, and the latch is magnetic and attracted to the magnetic lock box.

[0021] Furthermore, based on the aforementioned scheme, the outer frame is also equipped with columns and springs.

[0022] The column is fixedly connected to the outer frame and located inside the U-shaped groove of the latch connector;

[0023] One end of the spring is fixedly connected to the column, and the other end of the spring is fixedly connected to the inner wall of the closed end of the locking tongue connector; wherein, the spring is in a stretched state when locked.

[0024] Furthermore, based on the aforementioned solution, a self-locking groove is provided on the side of the locking tongue connector opposite to the unlocking groove. The self-locking groove is conical and the larger diameter end of the self-locking groove faces the unlocking groove.

[0025] The other side of the locking block is provided with a self-locking part, which is a protruding conical block and is adapted to be inserted into the self-locking groove.

[0026] Furthermore, based on the aforementioned solution, the latch connector is provided with a stop block near the inner wall of the self-locking groove, and the stop block is located on the side of the self-locking groove away from the magnetic lock box.

[0027] Furthermore, based on the aforementioned scheme, the lock block is circular in shape, and the lock block and the unlocking part together form a whistle shape, and the arc length between the self-locking part and the unlocking part along the unlocking rotation direction is less than 1 / 2 of the arc length of the lock block.

[0028] Furthermore, based on the aforementioned scheme, the magnetic lock box includes a box body and a magnet, the magnet being disposed inside the box body, and an opening being provided at one end of the box body for the locking tongue assembly to pass through.

[0029] Furthermore, based on the aforementioned solution, the outer frame includes an upper frame and a lower frame, and the upper frame and the lower frame are detachably connected.

[0030] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0031] This application utilizes a magnetic lock box, a lock body capable of magnetically locking to the magnetic lock box, and a key for unlocking. The lock body includes an outer frame, a lock cylinder assembly, and a bolt assembly. The bolt assembly, located inside the outer frame, magnetically engages with the magnetic lock box, automatically locking when the passenger compartment cover is pushed up. The lock cylinder assembly is inserted through one end of the outer frame, with an unlocking part on its side wall that fits into the unlocking groove of the bolt assembly. When the key rotates the lock cylinder assembly to unlock, the lock cylinder assembly drives the unlocking part to move the bolt assembly away from the magnetic lock box, thus separating the bolt assembly from the magnetic lock box and unlocking. This application allows for automatic locking simply by pushing the passenger compartment cover up, making the cover opening and closing more convenient and quick. Unlocking with a key reduces the risk of jamming or stripping due to frequent lock operation. It also solves the problem of the cover being left unlocked due to operators forgetting to lock it, resulting in the cover being open during operation. Furthermore, it improves the reliability of the cover locking device, reducing the occurrence of malfunctions. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the efficient and reliable locking device for the electrical cabinet cover of the subway passenger compartment, as described in this utility model embodiment.

[0034] Figure 2 This is an exploded structural diagram of an efficient and reliable locking device for the cover of an electrical cabinet in a subway passenger compartment, according to one embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the internal structure of a highly efficient and reliable locking device for the electrical cabinet cover of a subway passenger compartment, according to another embodiment of this utility model.

[0036] Figure 4 This is a schematic diagram of the lock cylinder structure according to an embodiment of the present utility model;

[0037] Figure 5 This is a schematic diagram of the locking device in an embodiment of the present invention when locked;

[0038] Figure 6 This is a schematic diagram of the unlocking of the locking device according to an embodiment of the present invention.

[0039] Icons: 1-Lock body, 11-Outer frame, 111-Lock interface, 112-Upper frame, 113-Lower frame, 114-Post, 115-Spring, 12-Lock cylinder assembly, 121-Lock cylinder, 1211-Lock base, 1212-First square part, 1213-Second square part, 1214-Threaded part, 1215-Limiting part, 1216-Keyhole, 122-Lock block, 123-Unlocking part, 124-Self-locking part, 13-Lock tongue assembly, 131-Lock tongue connector, 1311-Unlocking groove, 1312-Self-locking groove, 1313-Stop, 132-Lock tongue, 2-Magnetic lock box, 21-Box body, 22-Magnet. Detailed Implementation

[0040] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0041] Please refer to Figures 1-6 The diagram shows the overall structure of the efficient and reliable locking device for the electrical cabinet cover in a subway passenger compartment.

[0042] This embodiment provides a highly efficient and reliable locking device for the cover of an electrical cabinet in a subway passenger compartment, including a lock body 1, a magnetic lock box 2, and a key.

[0043] The lock body 1 includes an outer frame 11, a lock cylinder assembly 12, and a bolt assembly 13. The outer frame 11 has a lock interface 111 at one end near the magnetic lock box 2. The lock cylinder assembly 12 is fixed to the cover plate and is vertically inserted through the outer frame 11 at the end away from the magnetic lock box 2. The lock cylinder assembly 12 has a keyhole 1216 adapted to the key at the end near the cover plate. The side wall of the lock cylinder assembly 12 has an unlocking part 123. The bolt assembly 13 is located inside the outer frame 11. The side wall of the bolt assembly 13 has an unlocking groove 1311 that is inserted into the unlocking part 123. The end of the bolt assembly 13 away from the lock cylinder assembly 12 can be magnetically attracted to the magnetic lock box 2.

[0044] When locking, one end of the bolt assembly 13 passes through the lock interface 111 and magnetically attracts the magnetic lock box 2; when unlocking, after the key is inserted into the keyhole 1216, the lock cylinder assembly 12 is rotated, and the unlocking part 123 drives the bolt assembly 13 to move toward the end away from the magnetic lock box 2, so that the bolt assembly 13 separates from the magnetic lock box 2.

[0045] The following will further describe an efficient and reliable locking device for the cover of an electrical cabinet in a subway passenger compartment, as described in this exemplary embodiment.

[0046] In some implementations, refer to Figure 1 and Figure 2The lock body 1 includes an outer frame 11, a lock cylinder assembly 12, and a bolt assembly 13. The end of the bolt assembly 13 furthest from the lock cylinder assembly 12 can magnetically attract the magnetic lock box 2. The end of the outer frame 11 closest to the magnetic lock box 2 has a lock interface 111 for the bolt assembly 13 to pass through and magnetically lock the magnetic lock box 2. The lock cylinder assembly 12 is fixed to a cover plate and vertically extends through the end of the outer frame 11 furthest from the magnetic lock box 2. The end of the lock cylinder assembly 12 closest to the cover plate has a keyhole 1216 for inserting a key to unlock the lock. The lock cylinder assembly 12 has an unlocking part 123 on its side wall and a bolt assembly 13 inside the outer frame 11. The side wall of the bolt assembly 13 has an unlocking groove 1311 that is inserted into the unlocking part 123. The unlocking part 123 is always inserted into the unlocking groove 1311 during locking and unlocking, so that the unlocking part 123 can drive the bolt assembly 13 to move and unlock.

[0047] In actual use, the lock body 1 is installed on the passenger compartment cover, and the magnetic lock box 2 is installed on the cover frame. When the passenger compartment cover is pushed up, the lock body 1 and the magnetic lock box 2 come close together. The bolt assembly 13, under the magnetic attraction of the magnetic lock box 2, passes through the lock interface 111 and magnetically locks with the magnetic lock box 2. The passenger compartment cover automatically locks by pushing it up and can be unlocked with a key, making the opening and closing of the cover more convenient and faster.

[0048] As a preferred implementation method, refer to Figure 3 The aforementioned lock cylinder assembly 12 includes a lock cylinder 121 and a lock block 122. The lock cylinder 121 is partially fixed to the passenger compartment cover plate, securing the lock body 1, and partially rotatably passes through the interior of the outer frame 11 and is integrally connected to the keyhole 1216. A portion of the lock cylinder 121's structure can rotate within the outer frame 11 and is integrally connected to the keyhole, allowing for unlocking by rotation after a key is inserted. The lock block 122 is located within the outer frame 11 and sleeved on the outside of the lock cylinder 121. When the keyhole 1216 is rotated, it can drive the unlocking part 123 to rotate synchronously. One side of the outer wall of the lock block 122 protrudes outward to form the unlocking part 123.

[0049] As a preferred implementation method, refer to Figure 4The aforementioned lock cylinder 121 includes a lock seat 1211, a first square portion 1212, a second square portion 1213, and a threaded portion 1214 arranged sequentially along its axis. The lock seat 1211 is fixedly connected to the first square portion 1212. The lock seat 1211 is fixed to the outside of the cover plate, and the first square portion 1212 is fixed to the cover plate to fix the lock body 1 to the passenger compartment cover plate. The keyhole 1216 is opened on the end face of the lock seat 1211. The keyhole 1216 is composed of a square hole opened in the lock seat and a square protrusion provided in the square hole. A 7*7 square key is inserted for unlocking. The aforementioned second square portion 1213 passes sequentially through the first square portion 1212 and the lock seat 1211 via a pivot and is integrally connected to the keyhole 1216, so that the second square portion 1213 rotates when a key is inserted. A lock block 122 is fitted onto the outside of the second square portion 1213. A square hole is provided inside the lock block 122, which is adapted to fit the second square portion 1213. This fitted method facilitates assembly and disassembly, and the rotation of the second square portion 1213 drives the lock block 122 to rotate synchronously. The aforementioned threaded portion 1214 passes through a through hole on the other side of the outer frame 11 and is threadedly fixed to the outside of the outer frame 11 by a limiting member 1215. The limiting member 1215 can be a nut, which connects to the threaded portion 1214 and cooperates with the lock seat 1211 to limit the lock cylinder 121 to the cover plate.

[0050] In some implementations, refer to Figure 3 The aforementioned latch assembly 13 includes a latch connector 131 and a latch 132.

[0051] The aforementioned latch connector 131 is U-shaped and slidably disposed within the outer frame 11. An unlocking groove 1311 is provided on the side of the latch connector 131 near the lock block 122. The unlocking part 123 is movably inserted into the unlocking groove 1311. The length of the unlocking groove 1311 extends along the sliding direction of the latch connector 131, allowing the unlocking part 123 to move freely within the unlocking groove 1311 when the keyhole 1216 is rotated. The aforementioned latch 132 is fixedly connected to the closed end of the latch connector 131. The latch 132 is magnetic and attracted to the magnetic lock box 2, allowing the latch connector 131 to move synchronously with the latch 132, facilitating unlocking by moving the latch 132 when the keyhole 1216 is rotated.

[0052] In a preferred embodiment, the outer frame 11 is further provided with a column 114 and a spring 115. The column 114 is fixedly connected to the outer frame 11 and located inside the U-shaped groove of the latch connector 131. One end of the spring 115 is fixedly connected to the column 114, and the other end of the spring 115 is fixedly connected to the inner wall of the closed end of the latch connector 131. The spring 115 is in a stretched state when locked. By setting the column 114 and the spring 115, the spring 115 is in a stretched state when locked. Therefore, after unlocking, since the lock body 1 is far away from the magnetic lock box 2, the latch 132 will be kept inside the outer frame 11 due to the elasticity of the spring 115, which can protect it and facilitate closing the cover plate, preventing the cover plate from being unable to be closed for locking when the latch 132 is exposed.

[0053] In a preferred embodiment, the latch connector 131 has a self-locking groove 1312 on the side opposite to the unlocking groove 1311. The self-locking groove 1312 is conical, with its larger diameter end facing the unlocking groove 1311. The other side of the lock block 122 has a self-locking part 124, which is a protruding conical block that fits into the self-locking groove 1312. By providing the self-locking part 124 and the unlocking groove 1311 in cooperation, when the latch 132 is magnetically locked, the self-locking part 124 is inserted into the self-locking groove 1312. Since both the self-locking part 124 and the unlocking groove 1311 are conical, and the larger diameter end of the conical self-locking groove 1312 faces inward, the self-locking part 124 can rotate out of the unlocking groove 1311, coordinating with the movement of the latch connector 131 during unlocking.

[0054] In a preferred embodiment, the above-mentioned latch connector 131 is provided with a stop 1313 near the inner wall of the self-locking groove 1312, and the stop 1313 is located on the side of the self-locking groove 1312 away from the magnetic lock box 2. The stop 1313 prevents the latch 132 and the latch connector 131 from disengaging from the lock box after the spring 115 breaks, thus maintaining self-locking.

[0055] In a preferred embodiment, the locking block 122 is circular in shape, and the locking block 122 and the unlocking part 123 together form a whistle shape. The arc length between the self-locking part 124 and the unlocking part 123 along the unlocking rotation direction is less than 1 / 2 of the arc length of the locking block 122, so that the unlocking part 123 can always be inserted into the unlocking slot 1311. The self-locking part 124 and the unlocking part 123 can cooperate with each other to achieve locking and unlocking.

[0056] As a preferred embodiment, the magnetic lock box 2 includes a box body 21 and a magnet 22. The magnet 22 is located inside the box body 21. One end of the box body 21 has an opening for the latch assembly 13 to pass through. Through the magnetic attraction between the magnet 22 and the latch 132, the latch 132 passes through the lock body 1 and into the box body 21, thereby realizing the magnetic locking connection between the lock body 1 and the magnetic lock box 2.

[0057] In a preferred embodiment, the outer frame 11 includes an upper frame 112 and a lower frame 113. The upper frame 112 and the lower frame 113 are detachably connected. The detachable connection method can be a snap-fit ​​connection or a bolt connection, etc.

[0058] Working principle: When the passenger compartment cover is closed, the latch 132 is attracted into the housing 21 by the magnetism in the magnetic lock housing 2, achieving automatic locking. Simultaneously, the latch 132 drives the latch connector 131 to move towards one end of the housing 21. Since the unlocking part 123 is inserted into the unlocking slot 1311, the movement of the latch connector 131 drives the lock block 122 to rotate, causing the self-locking part 124 to engage in the self-locking slot 1312, achieving a self-holding function. Figure 5 As shown. Unlocking is achieved by inserting a 7*7 square key into the keyhole 1216 and rotating the lock block 122. Since the unlocking part 123 is inserted into the unlocking groove 1311, the unlocking part 123 pulls the bolt connector 131 until the bolt 132 leaves the lock box. The self-locking part 124 rotates out of the self-locking groove 1312, thus unlocking the passenger compartment cover. After unlocking, the bolt 132 remains within the lock body 1 due to the action of the spring 115. Figure 6 As shown.

[0059] The beneficial effects of the embodiments of this application are as follows:

[0060] The system automatically locks by pushing the passenger compartment cover up and unlocks it using the square hole, making the opening and closing of the cover more convenient and quick. It also solves the problem of the electrical cabinet passenger compartment cover latch getting stuck or stripped due to excessive force applied during frequent operation. Furthermore, it addresses the issue of the cover not being locked due to operators forgetting to lock it, resulting in the cover being open during operation.

[0061] Both the lock body 1 and the magnetic lock box 2 are detachable, which makes it convenient for maintenance personnel to disassemble and install them, improves the work efficiency of maintenance personnel, enhances the reliability of the lock, and reduces the occurrence of failures in the two problem scenarios mentioned above.

[0062] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0063] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A highly efficient and reliable locking device for the cover of an electrical cabinet in a subway passenger compartment, characterized in that, This includes a lock body, magnetic lock box, and key that are compatible with the locking mechanism. The lock body includes an outer frame, a lock cylinder assembly, and a bolt assembly. The outer frame has a lock interface at one end near the magnetic lock box. The lock cylinder assembly is fixed to a cover plate and vertically extends through the outer frame at the end furthest from the magnetic lock box. The end of the lock cylinder assembly near the cover plate has a keyhole adapted to the key, and the side wall of the lock cylinder assembly has an unlocking portion. The bolt assembly is located inside the outer frame, and its side wall has an unlocking groove for insertion into the unlocking portion. The end of the bolt assembly furthest from the lock cylinder assembly can magnetically attract the magnetic lock box. When locking, one end of the bolt assembly passes through the lock interface and magnetically attracts the magnetic lock box; when unlocking, after the key is inserted into the keyhole, the lock cylinder assembly is rotated, and the unlocking part drives the bolt assembly to move toward the end away from the magnetic lock box, so that the bolt assembly separates from the magnetic lock box.

2. The efficient and reliable locking device for the cover of the electrical cabinet in the subway passenger compartment according to claim 1, characterized in that, The lock cylinder assembly includes a lock cylinder and a lock block. The lock cylinder is fixed to the cover plate, and part of it rotates through the inside of the outer frame and is integrally connected to the keyhole; The lock block is located inside the outer frame and sleeved on the outside of the lock cylinder; one side of the outer wall of the lock block protrudes outward to form the unlocking part.

3. The efficient and reliable locking device for the cover of the electrical cabinet in the subway passenger compartment according to claim 2, characterized in that, The lock cylinder includes a lock base, a first square portion, a second square portion, and a threaded portion arranged sequentially along its axis. The lock seat is fixedly connected to the first square portion, wherein the lock seat is fixed to the outside of the cover plate, and the first square portion is inserted through and fixed to the cover plate; The second square portion passes sequentially through the first square portion and the lock base via a pivot and is integrally connected to the keyhole; wherein, the lock block is sleeved on the outside of the second square portion; The threaded part is fixedly connected to the second square part and passes through the other side of the outer frame before being limited and fixed by a limiting member.

4. The efficient and reliable locking device for the cover of the electrical cabinet in the subway passenger compartment according to claim 2, characterized in that, The latch assembly includes a latch connector and a latch. The latch connector is U-shaped and slides within the outer frame; the latch connector has an unlocking groove on the side near the lock block, and the unlocking part is movably inserted into the unlocking groove; The latch is fixedly connected to the closed end of the latch connector, and the latch is magnetic and attracted to the magnetic lock box.

5. The efficient and reliable locking device for the cover of the electrical cabinet in the subway passenger compartment according to claim 4, characterized in that, The outer frame also contains columns and springs. The column is fixedly connected to the outer frame and located inside the U-shaped groove of the latch connector; One end of the spring is fixedly connected to the column, and the other end of the spring is fixedly connected to the inner wall of the closed end of the locking tongue connector; wherein, the spring is in a stretched state when locked.

6. The efficient and reliable locking device for the cover of the electrical cabinet in the subway passenger compartment according to claim 4, characterized in that, The locking tongue connector has a self-locking groove on the side opposite to the unlocking groove. The self-locking groove is conical and the larger diameter end of the self-locking groove faces the unlocking groove. The other side of the locking block is provided with a self-locking part, which is a protruding conical block and is adapted to be inserted into the self-locking groove.

7. The efficient and reliable locking device for the cover of the electrical cabinet in a subway passenger compartment according to claim 6, characterized in that, The latch connector is provided with a stop block near the inner wall of the self-locking groove, and the stop block is located on the side of the self-locking groove away from the magnetic lock box.

8. The efficient and reliable locking device for the cover of the electrical cabinet in a subway passenger compartment according to claim 6, characterized in that, The lock block is circular in shape, and the lock block and the unlocking part together form a whistle shape. The arc length between the self-locking part and the unlocking part along the unlocking rotation direction is less than 1 / 2 of the arc length of the lock block.

9. The efficient and reliable locking device for the cover of the electrical cabinet in a subway passenger compartment according to claim 1, characterized in that, The magnetic lock box includes a box body and a magnet. The magnet is located inside the box body, and one end of the box body has an opening for the locking tongue assembly to pass through.

10. The efficient and reliable locking device for the cover of the electrical cabinet in a subway passenger compartment according to claim 1, characterized in that, The outer frame includes an upper frame and a lower frame, and the upper frame and the lower frame are detachably connected.

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