Plug-in box interlock mechanism

Abstract

The application discloses an interlocking mechanism of a plug-in box, which comprises a plug-in box shell, a circuit breaker arranged in the plug-in box shell, and a plug-in box hook arranged outside the plug-in box shell and capable of being swingingly arranged relative to the plug-in box shell for selectively hanging the plug-in box body on a bus duct. The interlocking mechanism further comprises an interlocking control mechanism selectively connected between the plug-in box hook and the circuit breaker. The circuit breaker is provided with a circuit breaker interlocking hole, and the opening and closing of the circuit breaker interlocking hole is controlled by a circuit breaker operating handle. When the circuit breaker operating handle is in a closed position, the circuit breaker interlocking hole is closed, the interlocking control structure cooperates with the plug-in box hook, the interlocking control mechanism limits the swing of the plug-in box hook, and the plug-in box hook cannot be moved. When the circuit breaker operating handle is in an open position, the interlocking control mechanism cooperates with the circuit breaker interlocking hole and is separated from the plug-in box hook, so that the limitation on the plug-in box hook is released, and the plug-in box hook can freely swing between an open state and a closed state.

Description

Technical Field

[0001] This application relates to the field of power equipment, and more particularly to a plug-in box interlocking mechanism. Background Technology

[0002] Busbar trunking is a complete power transmission and distribution device consisting of copper and aluminum conductors and an enclosed casing, used to transmit and distribute large-capacity electrical energy. It is a type of low-voltage power transmission trunk line used indoors, and is increasingly replacing wires and cables in low-voltage power distribution projects.

[0003] Busbar trunking is usually used in conjunction with plug-in boxes. In the existing technology, the mechanical connection structure and power transmission structure of plug-in boxes and busbar trunking are independent of each other. Therefore, there may be situations where plug-in boxes are disassembled or installed on busbar trunking while they are energized. Live operation can easily cause safety hazards and personal safety issues for users. Summary of the Invention

[0004] The purpose of this application is to provide a plug-in box interlocking mechanism that can ensure the disassembly or installation between the plug-in box and the busbar trunking when the plug-in box is de-energized, thus ensuring good safety.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] On one hand, a plug-in box interlocking mechanism includes a plug-in box housing, a circuit breaker disposed inside the plug-in box housing, and a plug-in box hook disposed outside the plug-in box housing. The plug-in box hook is swayable relative to the plug-in box housing to selectively suspend the plug-in box body on a busbar trough. It also includes an interlocking control mechanism selectively connected between the plug-in box hook and the circuit breaker. The circuit breaker has a circuit breaker interlocking hole, the opening and closing of which is controlled by a circuit breaker operating handle. When the circuit breaker operating handle is in the closed position, the circuit breaker interlocking hole is closed, and the interlocking control mechanism engages with the plug-in box hook, restricting the swing of the plug-in box hook and preventing it from moving. When the circuit breaker operating handle is in the open position, the interlocking control mechanism engages with the circuit breaker interlocking hole and disengages from the plug-in box hook, thereby releasing the restriction on the plug-in box hook and allowing it to swing freely between the open and closed states.

[0007] Optionally, the interlocking control mechanism includes an interlocking shaft, one end of which can be selectively plugged into the circuit breaker interlocking hole, and the other end can be selectively plugged into the plug-in box hook.

[0008] Optionally, a drive mechanism is provided on the interlocking shaft. The drive mechanism is configured to always apply a force to the interlocking shaft in the direction of the plug-in box hook to drive the interlocking shaft to engage with the plug-in box hook, thereby limiting the swing of the plug-in box hook.

[0009] Optionally, the plug-in box housing is further provided with a fixed guide rail, and the interlocking shaft is disposed on the fixed guide rail and can slide along the direction defined by the fixed guide rail.

[0010] Optionally, an axial positioning mechanism is fixedly installed on the interlocking shaft, a support plate is fixedly installed on the fixed guide rail, the interlocking shaft passes through the support plate, and the driving mechanism is a compression spring. The compression spring is located on the side of the support plate away from the circuit breaker and between the support plate and the axial positioning mechanism. One end of the compression spring abuts against the support plate, and the other end abuts against the axial positioning mechanism, for pushing the interlocking shaft toward the direction of the plug-in box hook.

[0011] Optionally, the plug-in box hook is also provided with a locking hole, so that when the interlocking shaft is inserted into the locking hole, it can be plugged into the plug-in box hook.

[0012] Optionally, the interlocking control mechanism further includes an unlocking operation mechanism, which is located outside the plug box housing and connected to the plug box hook. The unlocking operation mechanism can control the swinging of the plug box hook.

[0013] Optionally, the unlocking mechanism includes an unlocking body and an unlocking button disposed inside the unlocking body. The unlocking button can selectively push the interlocking shaft out of the locking hole to release the lock on the plug box hook.

[0014] Optionally, the unlocking body includes a button sleeve and a button housing. The button sleeve has a first button mounting hole, and the button housing has a second button mounting hole. The unlocking button is movably disposed in the first button mounting hole, one end of which can be selectively inserted into the locking hole to push the interlocking shaft out of the locking hole, and the other end can extend to the outside of the unlocking body through the second button mounting hole for easy operation by the operator.

[0015] Optionally, both the first button mounting hole and the second button mounting hole are circular holes. The second button mounting hole is coaxially arranged with the first button mounting hole, and the diameter of the second button mounting hole is smaller than the diameter of the first button mounting hole. The unlock button is provided with an annular boss, and a button reset spring is provided between the annular boss and the inner wall of the button housing.

[0016] The beneficial effects of this application are as follows: The circuit breaker interlocking mechanism of this solution directly cooperates with the circuit breaker to achieve the interlocking function. When the circuit breaker is in the closed position, the hook of the plug box is restricted from swinging, so the plug box cannot be disassembled relative to the busbar. Similarly, when the plug box is removed and reinstalled, if the circuit breaker is in the closed position, the plug box cannot open the hook for plugging, thus avoiding the safety hazards caused by live operation and ensuring the personal safety of users. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the connection state between the plug-in box and the busbar trunking as described in the embodiments of this application.

[0019] Figure 2 This is a schematic diagram of the disassembled state of the plug-in box and busbar trunking described in the embodiments of this application.

[0020] Figure 3 This is a side view of the internal structure of the plug-in box and busbar trunking in the connection state described in the embodiment of this application.

[0021] Figure 4 This is a partial structural diagram of the plug-in box hook locking state of the plug-in box interlocking mechanism described in the embodiments of this application.

[0022] Figure 5 This is a three-dimensional structural diagram of the plug-in box interlocking mechanism with the plug-in box hook locked in the embodiment of this application.

[0023] Figure 6 This is a partial structural diagram of the plug-in box interlocking mechanism with the hook in the unlocked state, as described in an embodiment of this application.

[0024] Figure 7 This is a three-dimensional structural diagram of the plug-in box interlocking mechanism with the hook in the unlocked state, as described in the embodiments of this application.

[0025] Figure 8 This is a schematic diagram of the interlocking shaft structure described in an embodiment of this application.

[0026] Figure 9 This is a schematic diagram of the assembly state of the interlocking shaft, fixed guide rail, and drive mechanism described in the embodiments of this application.

[0027] Figure 10 This is a partial cross-sectional view of the assembly state of the unlocking mechanism and the plug-in box hook described in the embodiments of this application.

[0028] In the picture:

[0029] 100. Busbar trunking; 200. Plug-in box housing; 210. Fixed guide rail; 220. Support plate; 300. Plug-in box hook; 310. First hook; 320. Connecting rod; 330. Second hook; 340. Locking hole; 400. Circuit breaker; 410. Circuit breaker interlocking hole; 420. Circuit breaker operating handle; 500. Interlocking shaft; 510. Axial positioning mechanism; 520. Compression spring; 600. Unlocking operating mechanism; 610. Unlocking body; 611. Button sleeve; 6111. First button mounting hole; 612. Button housing; 6121. Second button mounting hole; 620. Unlocking button; 621. Annular boss; 622. Return spring. Detailed Implementation

[0030] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] like Figure 1-10As shown, this embodiment provides a plug-in box interlocking mechanism, including a plug-in box housing 200. A circuit breaker 400 is installed inside the plug-in box housing 200. In this solution, the plug-in box is energized when the circuit breaker 400 is in the closed state and de-energized when the circuit breaker 400 is in the open state. The specific implementation method is a technical means commonly used in the field and is not within the protection scope of this solution. It will not be described in detail in this solution. This solution requests protection for the linkage structure between the circuit breaker 400 and the plug-in box hook 300.

[0034] Specifically, the plug-in box housing 200 is provided with a plug-in box hook 300 on its exterior. The plug-in box hook 300 is swayable relative to the plug-in box housing 200 to selectively suspend the plug-in box body on the busbar 100. It also includes an interlocking control mechanism selectively connected between the plug-in box hook 300 and the circuit breaker 400. The circuit breaker 400 is provided with a circuit breaker interlocking hole 410. The opening or closing of the circuit breaker interlocking hole 410 is controlled by the circuit breaker operating handle 420. When the operating handle 420 is in the closed position, the circuit breaker interlock hole 410 is closed, and the interlock control structure cooperates with the plug box hook 300. The interlock control mechanism restricts the swing of the plug box hook 300, preventing it from moving. When the circuit breaker operating handle 420 is in the open position, the interlock control mechanism cooperates with the circuit breaker interlock hole 410 and disengages from the plug box hook 300, thereby releasing the restriction on the plug box hook 300 and allowing it to swing freely between the open and closed states.

[0035] In this scheme, the interlocking mechanism of the circuit breaker 400 works directly with the circuit breaker 400 to achieve the interlocking function. When the circuit breaker 400 is in the closed position, the hook 300 of the plug box is restricted from swinging, so that the plug box cannot be disassembled relative to the busbar 100, avoiding the safety hazards caused by live operation and ensuring the personal safety of the user.

[0036] This solution also includes a hook mounting box. The plug-in box hooks 300 are mounted on the plug-in box housing via the hook mounting box. In this solution, the plug-in box is fixed to the busbar trough 100 by the plug-in box hooks 300. There are two sets of plug-in box hooks 300, respectively located at both ends of the plug-in box housing 200. The two sets of plug-in box hooks 300 are respectively fastened to the busbar trough 100 to fix the plug-in box. Each set of plug-in box hooks 300 includes a first hook 310 and a second hook 330. Both the first hook 310 and the second hook 330 are connected to the plug-in box housing 200 through a sliding structure. In this application, the first hook 310 and the second hook 330 are connected by a connecting rod 320 with a waist-shaped hole. The connecting rod 320 has a shaft hole in the middle. The connecting rod 320 can be rotatably connected to the hook mounting box through the shaft hole and the rotating shaft. After being connected by the connecting rod 320, the rotation of the connecting rod 320 can drive the first hook 310 and the second hook 330 to slide. The first hook 310 and the second hook 330 can move synchronously to open and close. During operation, they can cooperate with or disengage from the busbar 100.

[0037] The specific structures of the first hook 310 and the second hook 330, the connection structure between them, and the sliding connection structure between them and the hook mounting box are existing technologies in this field and will not be described in detail in this application.

[0038] In this design, the circuit breaker interlocking hole 410 is an opening formed on the circuit breaker 400 housing. When the circuit breaker operating handle 420 is in the closed position, the circuit breaker interlocking hole 410 is blocked by the control linkage inside the circuit breaker 400 that swings with the circuit breaker operating handle 420. At this time, the interlocking control mechanism is obstructed by the control linkage inside the circuit breaker and cannot extend into the circuit breaker interlocking hole 410. When the circuit breaker operating handle 420 is in the open position, the interlocking control mechanism inside the circuit breaker 400, which swings with the circuit breaker operating handle 420, is blocked. The position of the control linkage changes, no longer obstructing the circuit breaker interlock hole 410. The interlock control mechanism can extend into the circuit breaker 400 housing through the circuit breaker interlock hole 410, so that its other end is no longer connected to the plug-in box hook 300, thus releasing the restriction on the plug-in box hook 300. The structure of the circuit breaker interlock hole 410, the circuit breaker operating handle 420, and the control linkage are inherent structures on the existing circuit breaker 400, and will not be described in detail in this application.

[0039] Specifically, the interlocking control mechanism includes an interlocking shaft 500, one end of which can be selectively inserted into the circuit breaker interlocking hole 410, and the other end can be selectively inserted into the plug-in box hook 300.

[0040] When the circuit breaker operating handle 420 is open, the interlocking shaft 500 can be inserted into the circuit breaker interlocking hole 410. At this time, the plug-in box hook 300 is not restricted and can swing freely. When the circuit breaker operating handle 420 is closed, the interlocking shaft 500 cannot be inserted into the circuit breaker interlocking hole 410. At this time, the end of the interlocking shaft 500 away from the circuit breaker 400 is inserted into the plug-in box hook 300, so that the plug-in box hook 300 cannot swing freely.

[0041] Furthermore, a driving mechanism is provided on the interlocking shaft 500. The driving mechanism is configured to always apply a force to the interlocking shaft 500 in the direction of the plug-in box hook 300 to drive the interlocking shaft 500 to engage with the plug-in box hook 300, thereby limiting the swing of the plug-in box hook 300.

[0042] By setting up a drive mechanism, the interlocking shaft 500 is always engaged with the plug box hook 300 without applying external force, so that the plug box hook 300 cannot swing arbitrarily, and thus the plug box cannot be disassembled or assembled at will.

[0043] To ensure the movement trajectory of the interlocking shaft 500 and the reliability of the interlocking, a fixed guide rail 210 is also provided inside the plug-in box housing 200 in this embodiment. The interlocking shaft 500 is mounted on the fixed guide rail 210 and can slide along the direction defined by the fixed guide rail 210. The interlocking shaft 500 has two sliding limit positions in the direction defined by the fixed guide rail 210. In one sliding limit position, the interlocking shaft 500 is inserted into the circuit breaker interlocking hole 410, and the plug-in box hook 300 can swing freely. In the other sliding limit position, the interlocking shaft 500 engages with the plug-in box hook 300, restricting the swing of the plug-in box hook 300.

[0044] Optionally, in this application, the interlocking shaft 500 is a Z-shaped shaft with thinner ends forming locking pins or locking rods to facilitate insertion, alignment, and limiting.

[0045] It should be noted that the interlocking shaft 500 is not limited to the structure of the Z-shaped shaft described above, and can also be a straight structure in other embodiments of this application.

[0046] Specifically, this embodiment also provides a driving mechanism and its installation method. An axial positioning mechanism 510 is fixedly installed on the interlocking shaft 500, and a support plate 220 is fixedly installed on the fixed guide rail 210. The interlocking shaft 500 passes through the support plate 220. The driving mechanism is a compression spring 520. The compression spring 520 is located on the side of the support plate 220 away from the circuit breaker 400 and between the support plate 220 and the axial positioning mechanism 510. One end of the compression spring 520 abuts against the support plate 220, and the other end abuts against the axial positioning mechanism 510, for pushing the interlocking shaft 500 toward the direction of the plug-in box hook 300.

[0047] Specifically, in this solution, the axial positioning mechanism 510 is a flange nut, which is sleeved on the interlocking shaft 500 for axial positioning. It should be understood that the above-mentioned use of a flange nut as the axial positioning mechanism 510 is not intended to limit this application. In other embodiments, the axial positioning mechanism 510 can also be formed by machining a shoulder or a collar on the interlocking shaft 500, or by sleeved a retaining ring or a sleeve on the interlocking shaft 500.

[0048] It is understood that the drive mechanism is not limited to using a compression spring 520; in other embodiments, a tension spring structure located on the opposite side may also be used.

[0049] In order to achieve the cooperation between the interlocking shaft 500 and the plug-in box hook 300, the plug-in box hook 300 in this solution is also provided with a locking hole 340. When the interlocking shaft 500 is inserted into the locking hole 340, it achieves the plug-in cooperation with the plug-in box hook 300.

[0050] Since the plug box hook 300 will not swing on its own when it is unlocked, the interlocking control mechanism in this application further includes an unlocking operation mechanism 600 for ease of operation. The unlocking operation mechanism 600 is located outside the plug box housing 200 and connected to the plug box hook 300. The unlocking operation mechanism 600 can control the swing of the plug box hook 300.

[0051] Furthermore, the unlocking mechanism 600 includes an unlocking body 610 and an unlocking button 620 disposed inside the unlocking body 610. The unlocking button 620 can selectively push the interlocking shaft 500 out of the locking hole 340 to release the lock on the plug box hook 300.

[0052] When no operation is performed, the compression spring 520 pushes the interlocking shaft 500 into the locking hole 340, restricting the swing of the plug box hook 300. When it is necessary to release the lock on the plug box hook 300, it is first necessary to ensure that the circuit breaker operating handle 420 is in the open state and the interlocking shaft 500 can be inserted into the circuit breaker interlocking hole 410. At this time, by pressing the unlocking button 620, the unlocking button 620 abuts against the interlocking shaft 500, pushing the interlocking shaft 500 to move towards the circuit breaker 400. The compression spring 520 is compressed. When the interlocking shaft 500 is completely withdrawn from the locking hole 340, the restriction on the plug box hook 300 is released.

[0053] This solution also provides a specific structure for the unlocking body 610, which includes a button sleeve 611 and a button housing 612. The button sleeve 611 has a first button mounting hole 6111, and the button housing 612 has a second button mounting hole 6121. The unlocking button 620 is movably disposed in the first button mounting hole 6111, with one end selectively inserted into the locking hole 340 to push the interlocking shaft 500 out of the locking hole 340, and the other end extending to the outside of the unlocking body 610 through the second button mounting hole 6121 for easy operation by the operator.

[0054] Both the first button mounting hole 6111 and the second button mounting hole 6121 are circular holes. The second button mounting hole 6121 is coaxially arranged with the first button mounting hole 6111, and the diameter of the second button mounting hole 6121 is smaller than the diameter of the first button mounting hole 6111. The unlock button 620 is provided with an annular boss 621, and a button return spring 622 is provided between the annular boss 621 and the inner wall of the button housing 612.

[0055] When the first hook 320 is in the open state, the button reset spring 622 ensures that the unlock button 620 remains inserted in the locking hole 340. At this time, the unlock button 620 does not protrude from the button housing 612, and the user cannot observe the unlock button 620 from the outside, indicating that the first hook 320 is not locked. When the hook is closed, the interlocking shaft 500 and the unlock button 620 are in the same straight line. The compression spring of the interlocking drive mechanism has a large elastic force, which pushes the unlock button 620 and compresses the reset spring 622, causing the unlock button 620 to protrude from the housing surface, indicating that the first hook 320 is fully closed.

[0056] This solution also includes a hook mounting box. The plug-in box hooks 300 are mounted on the plug-in box housing via the hook mounting box. In this solution, the plug-in box is fixed to the busbar trough 100 by the plug-in box hooks 300. There are two sets of plug-in box hooks 300, respectively located at both ends of the plug-in box housing 200. The two sets of plug-in box hooks 300 are respectively fastened to the busbar trough 100 to fix the plug-in box. Each set of plug-in box hooks 300 includes a first hook 310 and a second hook 330. The first hook 310 and the second hook 330 are both connected to the plug-in box housing 200 through a sliding structure. They can slide away from or relative to each other in the width direction of the plug-in box housing 200 to switch between the open and closed states. In this application, the unlocking operation mechanism 600 is connected to the first hook 310. The first hook 310 and the second hook 330 are driven by a connecting rod 320 with a waist-shaped hole. The connecting rod 320 has a shaft hole in the middle. The connecting rod 320 can be rotatably connected to the hook mounting box through the shaft hole and the rotating shaft. After the connecting rod 320 is connected, the rotation of the connecting rod 320 can drive the first hook 310 and the second hook 330 to slide. The first hook 310 and the second hook 330 can move synchronously to open and close. During operation, pressing the unlock button 620 pushes the interlocking drive mechanism to exit the locking hole 340. After unlocking the plug box hook 300, the unlocking operation mechanism 600 can be moved to drive the first hook 310 to move. The movement of the first hook 310 drives the connecting rod 320 to rotate around the rotating shaft. The second hook 330 connected to the other end of the connecting rod 320 moves synchronously under the action of the connecting rod 320, so that the first hook 310 and the second hook 330 open relative to each other. At this time, the plug box can be removed from the bus trunking 100. At the same time, the circuit breaker 400 cannot be closed. When the plug-in box is assembled onto the busbar 100, the unlocking mechanism 600 is moved in the opposite direction. The first hook 310 and the second hook 330 move toward each other to achieve a latching state, which can fix the plug-in box onto the busbar 100. In this state, the circuit breaker 400 can be closed.

[0057] The specific structures of the first hook 310 and the second hook 330, as well as the sliding connection structures between them and the hook mounting box, are existing technologies in this field and will not be described in detail in this application.

[0058] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0059] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0061] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A plug-in box interlocking mechanism, characterized in that, The system includes a socket box housing (200), inside which a circuit breaker (400) is installed, and on the outside of which a socket box hook (300) is installed. The socket box hook (300) is swayable relative to the socket box housing (200) to suspend the socket box body on the busbar trunking (100). It also includes an interlocking control mechanism connecting the socket box hook (300) and the circuit breaker (400). The circuit breaker (400) has a circuit breaker interlocking hole (410), and the opening or closing of the circuit breaker interlocking hole (410) is operated by the circuit breaker. The circuit breaker is controlled by a handle (420). When the circuit breaker operating handle (420) is in the closed position, the circuit breaker interlock hole (410) is closed, and the interlock control mechanism cooperates with the plug box hook (300). The interlock control mechanism restricts the swing of the plug box hook (300) so that it cannot move. When the circuit breaker operating handle (420) is in the open position, the interlock control mechanism cooperates with the circuit breaker interlock hole (410) and disengages from the plug box hook (300), thereby releasing the restriction on the plug box hook (300) and allowing it to swing freely between the open and closed states. The interlocking control mechanism includes an interlocking shaft (500), one end of which is inserted into the circuit breaker interlocking hole (410), and the other end is inserted into the plug box hook (300). The interlocking shaft (500) is provided with a driving mechanism, which is configured to always apply a force to the interlocking shaft (500) in the direction of the plug-in box hook (300) to drive the interlocking shaft (500) to cooperate with the plug-in box hook (300) and restrict the swing of the plug-in box hook (300). The interlocking control mechanism further includes an unlocking operation mechanism (600), which is located outside the plug box housing (200) and connected to the plug box hook (300). The unlocking operation mechanism (600) can control the plug box hook (300) to swing. The unlocking mechanism (600) includes an unlocking body (610) and an unlocking button (620) disposed inside the unlocking body (610). The unlocking button (620) pushes the interlocking shaft (500) out of the locking hole (340) disposed on the plug box hook (300) to release the lock on the plug box hook (300).

2. The interlocking mechanism for the plug-in box according to claim 1, characterized in that, The plug box housing (200) is also provided with a fixed guide rail (210), and the interlocking shaft (500) is disposed on the fixed guide rail (210) and can slide along the direction defined by the fixed guide rail (210).

3. The interlocking mechanism for the plug-in box according to claim 2, characterized in that, An axial positioning mechanism (510) is fixedly installed on the interlocking shaft (500), and a support plate (220) is fixedly installed on the fixed guide rail (210). The interlocking shaft (500) passes through the support plate (220). The driving mechanism is a compression spring (520). The compression spring (520) is located on the side of the support plate (220) away from the circuit breaker (400) and between the support plate (220) and the axial positioning mechanism (510). One end of the compression spring (520) abuts against the support plate (220), and the other end abuts against the axial positioning mechanism (510), which is used to push the interlocking shaft (500) toward the direction of the plug-in box hook (300).

4. The interlocking mechanism for the plug-in box according to claim 3, characterized in that, When the interlocking shaft (500) is inserted into the locking hole (340), it achieves a plug-in engagement with the plug-in box hook (300).

5. The interlocking mechanism for the plug-in box according to claim 1, characterized in that, The unlocking body (610) includes a button sleeve (611) and a button housing (612). The button sleeve (611) has a first button mounting hole (6111), and the button housing (612) has a second button mounting hole (6121). The unlocking button (620) is movably disposed in the first button mounting hole (6111), with one end inserted into the locking hole (340) to push the interlocking shaft (500) out of the locking hole (340), and the other end extending to the outside of the unlocking body (610) through the second button mounting hole (6121) for easy operation by the operator.

6. The interlocking mechanism for the plug-in box according to claim 5, characterized in that, Both the first button mounting hole (6111) and the second button mounting hole (6121) are circular holes. The second button mounting hole (6121) is coaxially arranged with the first button mounting hole (6111), and the diameter of the second button mounting hole (6121) is smaller than the diameter of the first button mounting hole (6111). The unlock button (620) is provided with an annular boss (621), and a button reset spring (622) is provided between the annular boss (621) and the inner wall of the button housing (612).

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