Cabinet body structure with single-pole plug-in

Abstract

The invention relates to a cabinet body structure with a single-pole plug-in, and relates to the technical field of switch cabinets, the cabinet body structure comprises a box body, one side vertical surface of the box body is provided with an installation port, and a box door used for blocking the installation port is installed; a plurality of plug connectors are arranged in the box body, each plug connector comprises a shell and a single lug plate fixed on the shell, fixing holes for clamping and fixing the end part, far away from the single lug plate, of the shell are distributed in the inner wall of the box body, and the plurality of fixing holes in the box body are the same as a plurality of binding posts on the molded case circuit breaker in layout; according to the invention, when the molded case circuit breaker is installed, the housing of the plug connector can be directly clamped into the corresponding fixing hole, and the single lug plate and the binding post are in accurate butt joint, and no extra copper bar is needed for winding and connection. By means of the improvement, installation steps are simplified, installation efficiency is improved, and time cost and labor cost are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of switch cabinets, and in particular to a cabinet structure with a single-pole plug-in. Background Art

[0002] In electrical systems, electrical cabinets, as core components, undertake the crucial tasks of power distribution, control, and protection. They contain a variety of electrical components, among which the molded case circuit breaker (MCCB) is a key protective device, designed to rapidly disconnect circuits in the event of abnormalities such as overloads and short circuits, thereby protecting the safe operation of equipment and systems. The single-pole plug-in is a crucial component that connects the MCCB to the rest of the electrical cabinet, ensuring reliable and secure circuit connections.

[0003] Among existing switchgear technologies, a cleverly designed switchgear has gained widespread popularity. This switchgear consists of a cabinet body and a door, with a dedicated circuit breaker compartment within the cabinet body for mounting molded case circuit breakers. A connector is secured to the inner wall, away from the door, to simplify circuit connection. The connector consists of a plastic body and three horizontally aligned plug contacts. The plastic body provides a secure support for the connectors, which then connect electrically to the terminal blocks on the molded case circuit breaker.

[0004] However, in practice, this design faces a thorny issue. The height of the terminal blocks on the molded case circuit breaker may not perfectly match the height of the plug connector on the connector. This mismatch prevents the plug connector from being directly connected to the terminal blocks during the molded case circuit breaker installation process, requiring the use of additional copper busbars for routing and connection. This step is not only tedious and complex, but also time-consuming, significantly increasing time and labor costs, leaving room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a cabinet structure with a single-pole plug-in to solve the problem that the installation of molded case circuit breakers in the above-mentioned related technologies is time-consuming and complicated.

[0006] The present application provides a cabinet structure with a single-pole plug-in, which adopts the following technical solution: A cabinet structure with a single-pole plug-in includes a box body, a mounting opening formed on a vertical surface of one side of the box body, and a box door installed to block the mounting opening; a plurality of connectors are arranged in the box body, each connector including a housing and a single terminal lug fixed to the housing; fixing holes are distributed on the inner wall of the box body for the end of the housing away from the single terminal lug to be clamped and fixed; the plurality of fixing holes on the box body have the same layout as the plurality of terminal posts on a molded case circuit breaker.

[0007] By adopting this technical solution, when installing a molded case circuit breaker, the connector housing can be directly snapped into the corresponding fixing hole, and the single lug can be precisely connected to the terminal post, eliminating the need for additional copper busbars for routing and connection. This improvement not only simplifies the installation process and improves efficiency, but also reduces time and labor costs. Furthermore, the cabinet structure design enhances the reliability and safety of circuit connections, providing a strong guarantee for the stable operation of the power system.

[0008] Optionally, an arc isolation plate is vertically mounted on the side of the housing facing the single terminal lug. The arc isolation plate is located on the side of the single terminal lug, and the arc isolation plate and the single terminal lug are parallel to each other.

[0009] By adopting this technical solution, the arc-isolating plate design provides both isolation and protection, preventing arcs from spreading outward when they occur at the connection between the single lug and the terminal, thereby reducing the potential threat posed by arc faults to surrounding electrical components and personnel. Furthermore, the arc-isolating plate provides mechanical support, enhancing the overall stability of the connector. This improvement not only improves the safety of the cabinet structure but also ensures the stable operation of the power system.

[0010] Optionally, a limit block is fixedly provided on the side of the shell facing the single wiring piece, a dovetail slider is fixedly provided on the side of the arc isolation plate facing the shell, a blocking block is fixedly provided on the upper end face of the dovetail slider, a dovetail groove is provided on the limit block for the dovetail slider to slide into, and the bottom side of the blocking block abuts against the upper side face of the limit block.

[0011] By adopting this technical solution, the connection between the arc-isolating plate and the housing becomes more stable and easier to install. The arrangement of the stop block and dovetail slider allows the arc-isolating plate to be precisely slid onto the housing along a specific path (i.e., the dovetail groove). The abutment between the blocking block and the stop block ensures the stability of the arc-isolating plate once installed. This design not only simplifies the installation process and reduces installation errors, but also improves the connection strength between the arc-isolating plate and the housing. Furthermore, the combination of the dovetail groove and the slider provides a certain self-locking function, effectively preventing the arc-isolating plate from accidentally falling off during use, further enhancing the safety and reliability of the cabinet structure.

[0012] Optionally, a guiding slope is provided on the side edge of the dovetail slider away from the blocking block.

[0013] By adopting this technical solution, the guide bevel design ensures that when the arc-isolating plate is slid into the housing, even if there is a certain deviation in the initial position, the bevel's guidance gradually adjusts it to the correct installation position. This feature not only reduces installation difficulty and improves installation efficiency, but also reduces the risk of damage caused by improper installation. Furthermore, the presence of the guide bevel also enhances the fit between the arc-isolating plate and the housing, ensuring a tighter and more secure connection after installation.

[0014] Optionally, the inner wall of the box body is slidably provided with locking blocks located on the two vertical sides of the shell, and is fixed with an elastic extrusion piece and a control piece that drives the two locking blocks to slide back to back; a guide rod is fixed on the side of the locking block away from the shell, and locking notches are opened on the sides where the two locking blocks are close to each other; the elastic extrusion piece can drive the two locking blocks to slide toward each other and make the vertical edge of the shell stuck in the locking notch.

[0015] By adopting this technical solution, once the housing is in place, the control member releases the squeezing effect of the elastic extrusion member on the locking block, causing the two locking blocks to slide toward each other under the action of the elastic force, thereby tightly locking the vertical edge of the housing into the locking notch and achieving a secure fixation. This design not only simplifies the installation process and improves installation efficiency, but also ensures the stability and reliability of the housing during installation. Furthermore, when unlocking is required, simply operate the control member again to easily release the housing, facilitating subsequent maintenance or replacement.

[0016] Optionally, the elastic extrusion member includes a first spring in a compressed state and a guide block fixed on the inner wall of the box body, the guide block is provided with a guide hole for the guide rod to pass through, and the two ends of the first spring are respectively fixedly connected to the side surfaces of the guide block and the locking block close to each other.

[0017] By adopting this technical solution, the first spring is in a compressed state, providing a continuous compressive force on the locking block, ensuring that the housing is securely locked into the locking notch after installation. The provision of the guide block and guide hole ensures the stability and accuracy of the locking block during sliding, preventing it from deviating from the predetermined path.

[0018] Optionally, the control component includes a control rope and a control rod located above the shell, and the two ends of the control rope are fixedly connected to the ends of the two guide rods away from each other, and a positioning groove located above the arc isolation plate is opened on the inner wall of the box body; the middle part of the control rope is fixedly connected to one end of the control rod, and the end of the control rod away from the control rope can be inserted into the positioning groove; the two locking blocks are in a back-to-back sliding state when the control rod is inserted into the positioning groove, and at this time the edge of the shell falls out of the locking notch.

[0019] By employing this technical solution, simply pulling the control cord allows the two locking blocks to slide away from each other via the control lever, allowing the housing edge to easily disengage from the locking notch. The fixed connection between the control cord and the control lever ensures stable and reliable operation, while the positioning groove provides stable support for the control lever in the unlocked state, preventing accidental movement. This design not only simplifies the unlocking process and improves operational efficiency, but also ensures safety during operation.

[0020] Optionally, a control notch is provided on the end face of the control rod away from the control rope. The control rod can be pulled out of the positioning groove and adjusted to a vertical position and moved down so that the upper edge of the arc isolation plate is stuck in the control notch. At this time, the two locking blocks are in a state of sliding toward each other, and the shell is stuck in the locking notch.

[0021] By adopting the above technical solution, after the shell is installed, the control rod is pulled out from the positioning groove and adjusted to a vertical state, and then the control rod is moved downward as a whole so that the upper edge of the arc isolation plate is stuck in the control notch. At this time, the two locking blocks are in a state of sliding toward each other, the shell is stuck in the locking notch, and the control rod is used to further lock the arc isolation plate.

[0022] Optionally, guide ridges are fixedly provided on two opposite sides of the arc isolation plate in the vertical direction, and guide grooves for the guide ridges to slide into are provided on the inner wall of the control notch.

[0023] By adopting this technical solution, the cooperation between the guide ribs and the guide grooves ensures that the arc-isolating plate slides along the correct path when it is inserted into the control notch, avoiding locking failure due to deviation. This design not only improves the accuracy and smoothness of the locking operation, but also reduces the risk of damage to the arc-isolating plate or control rod due to improper operation.

[0024] Optionally, an elastic clamping piece is provided on the guide ridge, and a positioning groove for the elastic clamping piece to be clamped into is provided on the inner wall of the guide slot.

[0025] By adopting this technical solution, when the arc-isolating plate slides into the control notch, the elastic clip automatically snaps into the positioning groove, thereby firmly connecting the arc-isolating plate to the control rod. This design not only prevents the arc-isolating plate from accidentally falling off during the locking process, but also improves the stability and reliability of the locking.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When installing a molded case circuit breaker, the connector housing can be directly inserted into the corresponding fixing hole, and the single lug can be precisely connected to the terminal post, eliminating the need for additional copper busbars for winding and connection. This improvement not only simplifies the installation process and improves efficiency, but also reduces time and labor costs.

[0027] 2. Once the housing is in place, the control releases the squeezing force of the elastic extrusion member on the locking block, allowing the two locking blocks to slide toward each other under the action of the elastic force, thereby firmly locking the vertical edge of the housing into the locking notch and achieving a secure fixation. This design not only simplifies the installation process and improves installation efficiency, but also ensures the stability and reliability of the housing during installation. Furthermore, when unlocking is required, simply operate the control again to easily release the housing, facilitating subsequent maintenance or replacement.

[0028] 3. After the shell is installed, pull the control rod out of the positioning groove and adjust it to a vertical state, then move the control rod downward as a whole so that the upper edge of the arc isolation plate is inserted into the control notch. At this time, the two locking blocks are in a state of sliding toward each other, the shell is inserted into the locking notch, and the control rod is used to further lock the arc isolation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a structural diagram of the installation distribution of the connectors in Example 1 of the present application; Figure 2 This is a partial cross-sectional structural diagram of the embodiment 1 of the present application embodying the installation and matching of the plug-in component; Figure 3 This is a schematic diagram of the structure of the arc isolation plate installation and coordination in Example 1 of the present application; Figure 4 This is a schematic diagram of the exploded structure of the arc isolation plate and the installation distribution of the connector in Example 1 of the present application; Figure 5 This is a structural diagram of the installation distribution of the connectors in Example 2 of the present application; Figure 6 This is a partial cross-sectional structural diagram of the second embodiment of the present application showing the installation and cooperation of the locking assembly; Figure 7 This is a partial cross-sectional structural diagram of the second embodiment of the present application showing the installation and coordination of the control component; Figure 8 This is a schematic diagram of the explosion structure of Example 2 of the present application, which embodies the installation distribution of the control rod and the arc isolation plate; Figure 9 This is a partial cross-sectional structural diagram of the second embodiment of the present application showing the installation and coordination of the control rod and the arc isolation plate; Figure 10 yes Figure 9 Enlarged schematic diagram of part A.

[0031] In the figure, 1. box body; 11. installation opening; 12. fixing hole; 13. positioning groove; 2. box door; 3. connector; 31. shell; 32. single terminal; 33. limit block; 331. dovetail slide; 4. arc isolation plate; 41. dovetail slider; 411. guide slope; 42. blocking block; 43. guide ridge; 431. placement groove; 44. elastic clip; 441. compression spring; 442. arc ridge; 5. locking assembly; 51. locking block; 511. locking notch; 512. guide rod; 52. elastic extrusion member; 521. first spring; 522. guide block; 53. control member; 531. control rope; 532. control rod; 5321. control notch; 5322. guide slide; 5323. positioning groove. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0033] Example 1: Reference Figure 1 、 Figure 2 and Figure 3 A cabinet structure with a single-pole plug-in includes a cabinet 1, wherein a mounting opening 11 is formed on a vertical surface of one side of the cabinet 1, and a cabinet door 2 is installed to block the mounting opening 11; one side of the cabinet door 2 is hinged to the edge of the opening of the cabinet 1, and the other side is detachably connected by a conventional lock structure; three groups of connectors 3 are provided in the cabinet 1, wherein the connectors 3 include a housing 31 and a single terminal 32 fixed to the housing 31; The inner wall of the box body 1 is provided with fixing holes 12 for the end of the shell 31 away from the single terminal 32 to be snapped in and fixed. The three fixing holes 12 on the box body 1 are arranged in the same manner as the three terminal posts on the molded case circuit breaker. When the cabinet structure is produced, corresponding fixing holes 12 are pre-opened on the box body 1 according to the matching molded case circuit breaker.

[0034] Reference Figure 3 The shell 31 is assembled by snapping together two half shells on the left and right sides, and finally fixedly connected by glue; an arc isolation plate 4 is installed in the vertical direction on the side of the shell 31 facing the single wiring piece 32, and the arc isolation plate 4 is located on the side of the single wiring piece 32, and the arc isolation plate 4 and the single wiring piece 32 are parallel to each other.

[0035] Reference Figure 3 and Figure 4A limit block 33 is integrally formed on the side of the housing 31 facing the single terminal piece 32, and a dovetail slider 41 is integrally formed on the side of the arc isolation plate 4 facing the housing 31, wherein a guide slope 411 is provided on the side edge of the dovetail slider 41 away from the blocking block 42; the blocking block 42 is integrally formed on the upper end surface of the dovetail slider 41, and a dovetail groove 331 is provided on the limit block 33; When the arc isolation plate 4 is installed, the dovetail slider 41 on the arc isolation plate 4 is slid in the vertical direction in advance so that the bottom side of the blocking block 42 abuts against the upper side of the limit block 33 until the bottom side of the blocking block 42 abuts against the upper side of the limit block 33, thereby realizing the installation and fixation of the arc isolation plate 4.

[0036] The implementation principle of the embodiment of this application is: The cabinet structure is mainly composed of a box body 1, a box door 2 and a connector 3; a mounting opening 11 is provided on one side of the box body 1, which is blocked by the box door 2. Three groups of connectors 3 are installed in the box body 1, and each group of connectors 3 consists of a shell 31 and a single terminal 32 fixed on the shell 31; the inner wall of the box body 1 is provided with fixing holes 12 that match the shell 31 of the connector 3. The layout of these fixing holes 12 is the same as the layout of the terminal blocks on the molded case circuit breaker, ensuring that the corresponding fixing holes 12 are pre-opened according to the specific circuit breaker model.

[0037] Example 2: Reference Figure 5 and Figure 6 The embodiment of the present application differs from the embodiment 1 in that a locking assembly 5 is provided inside the box body 1, wherein the locking assembly 5 includes a locking block 51 relatively slidably mounted on the inner wall of the box body 1, an elastic extrusion member 52 fixedly mounted on the inner wall of the box body 1, and a control member 53 disposed on the inner wall of the box body 1 for driving the two locking blocks 51 to slide back and forth, and the two locking blocks 51 are respectively located on the two vertical sides of the shell 31; a guide rod 512 is fixedly mounted on the side of the locking block 51 away from the shell 31, and a locking notch 511 is formed on the sides of the two locking blocks 51 close to each other; Before the shell 31 is installed, the locking blocks 51 are kept in a state of sliding toward each other through the control member 53; after the shell 31 is installed on the inner wall of the box body 1, the traction of the two locking blocks 51 by the control member 53 is released, and the two locking blocks 51 are driven to slide toward each other through the elastic extrusion member 52, and the vertical edge of the shell 31 is stuck in the locking notch 511.

[0038] Reference Figure 6 The elastic extrusion member 52 includes a first spring 521 in a compressed state and a guide block 522 fixed on the inner wall of the box body 1, wherein the guide block 522 is provided with a guide hole for the guide rod 512 to pass through, and the two ends of the first spring 521 are respectively fixedly connected to the side surfaces of the guide block 522 and the locking block 51 close to each other.

[0039] Reference Figure 6 and Figure 7 The control member 53 includes a control rope 531 and a control rod 532 located above the housing 31. The two ends of the control rope 531 are fixedly connected to the ends of the two guide rods 512 that are away from each other. A positioning groove 13 is opened on the inner wall of the box body 1 and is located above the arc isolation plate 4. The middle part of the control rope 531 is fixedly connected to one end of the control rod 532, and the end of the control rod 532 away from the control rope 531 can be inserted into the positioning groove 13; when the control rod 532 is inserted into the positioning groove 13, the two locking blocks 51 overcome the elastic force of the elastic extrusion member 52 and are in a state of sliding back to back. At this time, the edge of the shell 31 is out of the locking notch 511.

[0040] Reference Figure 7 and Figure 8 , a control notch 5321 is provided on the end surface of the control rod 532 away from the control rope 531; after the shell 31 is installed, the control rod 532 is pulled out of the positioning groove 13 and adjusted to a vertical state, and then the control rod 532 is moved downward as a whole so that the upper edge of the arc isolation plate 4 is stuck in the control notch 5321. At this time, the two locking blocks 51 are in a state of sliding toward each other, and the shell 31 is stuck in the locking notch 511. At the same time, the control rod 532 is used to further lock the arc isolation plate 4.

[0041] Reference Figure 8 、 Figure 9 and Figure 10 , guide ridges 43 are integrally formed on the two opposite sides of the arc isolation plate 4 in the vertical direction, and an elastic clamping member 44 is provided on the guide ridge 43. The elastic clamping member 44 includes a compression spring 441 and an arc-shaped protrusion 442. A placement groove 431 for the compression spring 441 and the arc-shaped protrusion 442 is opened on the guide ridge 43. The compression spring 441 presses one side of the arc-shaped protrusion 442 so that a portion of the arc-shaped protrusion 442 protrudes from the opening of the placement groove 431. The outer side surface of the protruding portion is an arc surface, and the arc length corresponding to the arc surface is a minor arc; A guide groove 5322 is provided on the inner wall of the control notch 5321, and a positioning groove 5323 is provided on the inner wall of the guide groove 5322 for the elastic clip 44 to be snapped into; when the control rod 532 and the arc isolation plate 4 are plugged into and assembled with each other, the guide protrusion 43 slides into the guide groove 5322, keeping the control rod 532 moving downward until the elastic clip 44 is snapped into the corresponding positioning groove 5323.

[0042] The implementation principle of the embodiment of this application is: Before installing the housing 31, the control member 53 is used to keep the locking blocks 51 in a sliding position facing away from each other. After installation, the control member 53 is released, and the elastic extrusion member 52 pushes the locking blocks 51 to slide toward each other, securing the edge of the housing 31 by snapping into the locking notch 511. The control member 53, through the control rope 531 and the control rod 532, flexibly controls the sliding position of the locking blocks 51, facilitating installation and removal of the housing 31. Furthermore, the guide ridges 43 and elastic clips 44 on the arc isolation plate 4 cooperate with the guide grooves 5322 and positioning grooves 5323 on the control rod 532, further enhancing the stability and ease of installation of the arc isolation plate 4.

[0043] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A cabinet structure with a single-pole plug-in, comprising a box body (1), a mounting opening (11) being provided on a vertical surface of one side of the box body (1), and a box door (2) being installed for blocking the mounting opening (11); It is characterized by: A plurality of connectors (3) are provided in the box (1), the connectors (3) comprising a housing (31) and a single terminal piece (32) fixed to the housing (31), and fixing holes (12) are distributed on the inner wall of the box (1) for the end of the housing (31) away from the single terminal piece (32) to be inserted and fixed, and the layout of the plurality of fixing holes (12) on the box (1) is the same as that of the plurality of terminal posts on the molded case circuit breaker.

2. A cabinet structure with a single-pole plug-in according to claim 1, characterized in that: An arc isolation plate (4) is mounted vertically on the side of the housing (31) facing the single terminal lug (32). The arc isolation plate (4) is located on the side of the single terminal lug (32). The arc isolation plate (4) and the single terminal lug (32) are parallel to each other.

3. A cabinet structure with a single-pole plug-in according to claim 2, characterized in that: A limiting block (33) is fixedly provided on the side of the shell (31) facing the single terminal piece (32), a dovetail slider (41) is fixedly provided on the side of the arc isolation plate (4) facing the shell (31), a blocking block (42) is fixedly provided on the upper end surface of the dovetail slider (41), a dovetail slot (331) for the dovetail slider (41) to slide into is provided on the limiting block (33), and the bottom side of the blocking block (42) is in contact with the upper side surface of the limiting block (33).

4. A cabinet structure with a single-pole plug-in according to claim 3, characterized in that: A guiding slope (411) is provided on the side edge of the dovetail slider (41) away from the blocking block (42).

5. The cabinet structure with a single-pole plug-in according to claim 3, characterized in that: The inner wall of the box (1) is provided with locking blocks (51) located on two vertical sides of the shell (31), an elastic extrusion member (52) and a control member (53) for driving the two locking blocks (51) to slide back to each other; A guide rod (512) is fixedly provided on the side of the locking block (51) away from the housing (31), and a locking notch (511) is provided on the sides of the two locking blocks (51) close to each other; the elastic extrusion member (52) can drive the two locking blocks (51) to slide toward each other and make the vertical edge of the housing (31) snap into the locking notch (511).

6. The cabinet structure with a single-pole plug-in according to claim 5, characterized in that: The elastic extrusion member (52) comprises a first spring (521) in a compressed state and a guide block (522) fixed on the inner wall of the box body (1); the guide block (522) is provided with a guide hole for the guide rod (512) to pass through; and the two ends of the first spring (521) are respectively fixedly connected to the side surfaces of the guide block (522) and the locking block (51) that are close to each other.

7. The cabinet structure with a single-pole plug-in according to claim 5, characterized in that: The control member (53) includes a control rope (531) and a control rod (532) located above the housing (31). Both ends of the control rope (531) are fixedly connected to the ends of the two guide rods (512) that are away from each other. A positioning groove (13) located above the arc isolation plate (4) is provided on the inner wall of the box (1). The middle portion of the control rope (531) is fixedly connected to one end of the control rod (532), and the end of the control rod (532) away from the control rope (531) can be inserted into the positioning groove (13); when the control rod (532) is inserted into the positioning groove (13), the two locking blocks (51) are in a state of sliding back to back, and at this time, the edge of the housing (31) is out of the locking notch (511).

8. The cabinet structure with a single-pole plug-in according to claim 7, characterized in that: A control notch (5321) is provided on the end surface of the control rod (532) away from the control rope (531). The control rod (532) can be pulled out of the positioning groove (13) and adjusted to a vertical position and then moved downward, so that the upper edge of the arc isolation plate (4) is inserted into the control notch (5321). At this time, the two locking blocks (51) are in a state of sliding toward each other, and the housing (31) is inserted into the locking notch (511).

9. The cabinet structure with a single-pole plug-in according to claim 8, characterized in that: Guide ridges (43) are fixedly provided on the two opposite sides of the arc isolation plate (4) in the vertical direction, and guide grooves (5322) for the guide ridges (43) to slide into are provided on the inner wall of the control notch (5321).

10. The cabinet structure with a single-pole plug-in according to claim 9, characterized in that: An elastic clamping member (44) is provided on the guide ridge (43), and a positioning groove (5323) for the elastic clamping member (44) to be clamped is provided on the inner wall of the guide slot (5322).

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