Interlocking device and plug box

Abstract

The utility model discloses an interlocking device and a jack box, the jack box comprises a box body with a top opening and a box door, the box door covers the top opening, the interlocking device is located outside the box body and arranged on the side wall of the box body, and the interlocking device moves between a locking position clamped with a bus duct and an unlocking position separated from the bus duct. The locking mechanism comprises a locking pin and an interlocking rod group, the locking pin is used for being clamped with the bus duct, the interlocking rod group is connected with the locking pin and can move so as to drive the locking pin to move between a locking position and an unlocking position, and a push rod end of the interlocking rod group retracts to an area corresponding to the side wall to avoid the box door when the push rod end is in the locking position; and at the unlocking position, the locking mechanism upwards extends out of the top end of the side wall to interfere with closing of the box door. When the jack box is not locked on the bus duct, the box door cannot be closed due to interference of the push rod end, and the circuit breaker cannot be switched on; when the jack box is locked on the bus duct, the push rod end retracts, the box door can be closed, and the circuit breaker can be switched on.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an interlocking device and a plug-in box. Background Art

[0002] The bus duct is an efficient power distribution device used to distribute high power to various components of the distributed system. In indoor low-voltage power transmission trunk projects, it has increasingly replaced wires and cables, and the plug-in box has the function of distributing electric energy and is widely used on the bus duct. At present, the plug-in box is plugged into the bus duct and the two are locked together with a locking structure. The locking structure is generally independently set on the plug-in box, and its locking function is not affected by the box door and circuit breaker of the plug-in box, so that when the plug-in box is not locked on the bus duct and the box door is closed, the circuit breaker can also be closed, which is undesirable.

[0003] Therefore, an interlocking device and a plug-in box are needed to at least partially solve the above problems. Utility Model Content

[0004] The content of the utility model introduces a series of simplified concepts, which will be further described in detail in the detailed implementation section. The content of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the utility model provides an interlocking device in a first aspect, which is used for a plug-in box of a bus duct, wherein the plug-in box comprises a box body with a top opening and a box door, wherein the box door covers the top opening, and the interlocking device is located outside the box body and is arranged on a side wall of the box body, wherein the interlocking device moves between a locking position for clamping with the bus duct and an unlocking position for detaching from the bus duct, and comprises:

[0006] A locking pin, the locking pin being used for clamping with the bus duct; and

[0007] an interlocking rod assembly, wherein the interlocking rod assembly is connected to the locking foot and is movable to drive the locking foot to move between the locking position and the unlocking position,

[0008] Wherein, the top rod end of the interlocking rod group retracts into the area corresponding to the side wall to avoid the box door when in the locking position, and extends upward to the top end of the side wall to interfere with the closing of the box door when in the unlocking position.

[0009] According to this solution, the plug-in box can be locked on the bus duct through the interlocking device, so that the two are connected together stably and reliably. There is interference between the interlocking device and the box door. When the locking pin is in the unlocking position, the plug-in box is not locked on the bus duct, the top rod end of the interlocking rod group extends upward, and the box door cannot be closed due to the interference of the top rod end, so that the circuit breaker cannot be closed; when the locking pin is in the locking position, the plug-in box is locked on the bus duct, the top rod end retracts, the box door can be closed, and the circuit breaker can be closed, so that the bus duct can distribute power normally.

[0010] Optionally, the interlocking rod group includes an operating rod for operating the interlocking device to move, and the operating rod is connected to the locking foot and is movable in the vertical direction to drive the locking foot to move.

[0011] According to this solution, the interlocking device can be pushed to move from the outside of the plug-in box by means of the operating rod, so that the plug-in box can be locked and unlocked.

[0012] Optionally, the operating rod has a gripping portion, and the gripping portion extends in a direction away from the side wall of the box body.

[0013] According to this solution, the interlocking device can be manually pushed to move by means of the gripping portion, which is convenient for the user to operate.

[0014] Optionally, the gripping portion is disposed at a top end of the operating rod.

[0015] According to this solution, the interlocking device can be easily pushed to move, and the production of the operating rod is convenient, for example, the top part of the operating rod is bent to form a gripping portion.

[0016] Optionally, the interlocking rod group also includes a third guide member for fixing to the side wall of the box body, the operating rod is provided with elongated third guide holes at intervals, the third guide holes are arranged vertically, and each of the third guide holes is penetrated by the third guide member.

[0017] According to this solution, there is guidance between the third guide hole and the third guide member, ensuring that the operating rod can move smoothly in the vertical direction without deflection.

[0018] Optionally, the third guide member is a fastener, and the operating rod is maintained in the locking position by tightening the fastener, and is maintained in the movable state by loosening the fastener.

[0019] According to this solution, pressure can be applied to the operating rod by tightening the third guide member to fix the position of the operating rod, ensuring that the plug-in box can remain locked in the bus duct and avoiding unlocking the plug-in box due to accidental pushing of the operating rod.

[0020] Optionally, the interlocking rod group further includes an action rod and a driving rod, wherein the action rod is movable in the vertical direction, the driving rod is pivotable around a pivot axis located in the middle of the driving rod, a first rod end of the driving rod is connected to the action rod, and a second rod end of the driving rod is connected to the operating rod.

[0021] The action rod has the push rod end which can interfere with the box door, and the moving direction of the action rod is opposite to the moving direction of the operating rod.

[0022] According to this solution, an interlocking rod group is formed by three connecting rods, and the vertical movement of the operating rod drives the driving rod to pivot, and then the driving rod drives the action rod to move vertically; the locking device has a simple structure, is easy to produce and manufacture, and has a good locking effect.

[0023] Optionally, the interlocking rod group also includes a second guide member, and the driving rod is respectively fixed to the action rod and the operating rod through the second guide member, and the driving rod is provided with long second guide holes at intervals, and the second guide holes are arranged along the length direction of the driving rod, and each of the second guide holes is penetrated by the second guide member.

[0024] According to this solution, there is guidance between the second guide hole and the second guide member, which ensures that the driving rod can be smoothly pivoted, thereby smoothly driving the action rod to move.

[0025] Optionally, the interlocking rod group also includes a first guide member for fixing to the side wall of the box body, and the action rod is provided with long first guide holes at intervals, the first guide holes are arranged vertically, and the first guide member is passed through each of the first guide holes.

[0026] According to this solution, there is guidance between the first guide hole and the first guide member, ensuring that the action rod can move smoothly in the vertical direction without deflection.

[0027] Optionally, a first pivot axis for pivotally connecting to the side wall is provided in the middle of the locking foot, and an end of the locking foot is pivotally connected to the bottom of the interlocking rod assembly via a second pivot axis.

[0028] According to this solution, the locking pin is pivotally connected to the bottom of the interlocking rod group, so that the interlocking rod group drives the locking pin to move and rotate on the side wall of the plug-in box when moving up and down, thereby realizing the conversion between the locked state and the unlocked state.

[0029] A second aspect of the utility model provides a plug-in box, the plug-in box comprising a box body with a top opening, a box door, and an interlocking device according to any one of the first aspects above, the box door covers the top opening and the box door extends beyond the side wall of the box body, the interlocking device is arranged on the side wall of the box body,

[0030] Wherein, when the interlocking device is in the locking position, the box door can be closed, and when the interlocking device is in the unlocking position, the box door is interfered by the top rod end of the interlocking device to prevent the box door from closing.

[0031] According to this solution, when the interlocking device is in the unlocking position, the plug-in box is not locked on the bus duct, the top rod end of the interlocking device extends upward, and the box door cannot be closed due to the interference of the top rod end, so that the circuit breaker cannot be closed; when the interlocking device is in the locking position, the plug-in box is locked on the bus duct, at this time the top rod end retracts and the box door can be closed, the circuit breaker can be closed, and the bus duct can distribute power normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following drawings of the present invention are used as a part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention.

[0033] In the attached figure:

[0034] Figure 1 It is a three-dimensional schematic diagram of the plug-in box according to the utility model, wherein the interlocking device is located in the locking position;

[0035] Figure 2 for Figure 1 A schematic diagram of a plug-in box being locked on a bus duct, wherein the interlocking device is in a locked position;

[0036] Figure 3 for Figure 1 Schematic diagram of the plug-in box not locked on the bus duct, where the interlocking device is in the unlocked position;

[0037] Figure 4 for Figure 1 A schematic diagram of a right side view of the plug box in FIG. 1 , wherein the interlocking device is in a locked position;

[0038] Figure 5 for Figure 1 Schematic diagram of the rear view of the plug-in box in which the interlocking device is in the locked position.

[0039] Description of reference numerals:

[0040] 10: Plug-in box

[0041] 11: Cabinet

[0042] 12: Top opening

[0043] 13: Box door

[0044] 14: Sidewall

[0045] 15: Manual switch

[0046] 20: Interlocking device

[0047] 30: Locking feet

[0048] 31: First pivot axis

[0049] 32: Second pivot axis

[0050] 40: Interlocking rod set

[0051] 50: Joystick

[0052] 51: Grip

[0053] 52: The third guide hole

[0054] 53: The third guide

[0055] 60: Driving rod

[0056] 61: Third pivot axis

[0057] 62: Second guide hole

[0058] 63: Second guide

[0059] 64: First rod end

[0060] 65: Second rod end

[0061] 70: Action rod

[0062] 71: First guide hole

[0063] 72: First guide

[0064] 73: Ejector end

[0065] 80: Bus duct DETAILED DESCRIPTION

[0066] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0067] In order to thoroughly understand the present invention, a detailed description will be provided in the following description. Obviously, the implementation of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0068] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0069] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0070] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this document are for illustrative purposes only and are not limiting.

[0071] The utility model provides an interlocking device and a plug-in box comprising the same.

[0072] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0073] like Figures 1 to 5 As shown, the utility model provides a plug-in box 10, which can be installed on a bus duct 80, and the plug-in box 10 is used to distribute electric energy. The plug-in box 10 includes a box body 11 with a top opening 12 and a box door 13. The box door 13 covers the top opening 12. A circuit breaker can be arranged inside the plug-in box 10, and the box door 13 is provided with a manual switch 15 connected to the circuit breaker. When the plug-in box 10 is installed on the bus duct 80, the user can operate the manual switch 15 to close or disconnect the circuit breaker. And when the box door 13 is closed, the circuit breaker can be closed normally.

[0074] It should be noted that the directional terms used in this article, such as "top", "bottom", "upper", "lower", "vertical", "horizontal direction", etc., are relative to the direction of the Figure 1 The plug-in box 10 shown is placed upright.

[0075] In order to lock the plug-in box 10 on the bus duct 80, the plug-in box 10 also includes an interlocking device 20. Figures 1 to 3 As shown, the interlocking device 20 is located outside the box 11 and is provided on the side wall 14 of the box 11. The plug-in box 10 is arranged in a first direction parallel to the length direction of the bus duct 80, and the interlocking device 20 is provided at one end side of the plug-in box 10 in the first direction. The interlocking device 20 is in a locked position (see FIG. 1 ) when it is engaged with the bus duct 80. Figure 2 ) and the unlocked position from the bus duct 80 (see Figure 3 By moving the interlocking device 20, the plug-in box 10 can be locked on the bus duct 80, or unlocked from the bus duct 80.

[0076] The interlocking device 20 includes a locking pin 30 and an interlocking rod set 40. The locking pin 30 is used to engage with the bus duct 80. The interlocking rod set 40 is connected to the locking pin 30 and can move to drive the locking pin 30 to move between a locked position and an unlocked position. The locking pin 30 is a clamping part, and the interlocking rod set 40 is a driving part, which is used to drive the locking pin 30 to move. The plug-in box 10 can be locked on the bus duct 80 through the interlocking device 20, so that the two are firmly and reliably connected together.

[0077] In this embodiment, there is interference between the interlocking rod set 40 and the door 13. Figure 1 and Figure 5 As shown, the door 13 extends beyond the side wall 14 of the box body 11 provided with the interlocking rod set 40. The top rod end 73 of the interlocking rod set 40 retracts into the area corresponding to the side wall 14 when in the locked position (see Figure 2 ), does not exceed the top of the side wall 14 to avoid the door 13, and the door 13 can be closed. In the unlocked position, the top of the side wall 14 is extended upward (see Figure 3 ) to interfere with the closing of the door 13, and the door 13 cannot be closed at this time.

[0078] In this way, when the locking pin 30 is in the unlocking position, the plug-in box 10 is not locked on the bus duct 80, the top rod end 73 of the interlocking rod group 40 extends upward, and the box door 13 cannot be closed due to the interference of the top rod end 73, so that the circuit breaker cannot be closed; when the locking pin 30 is in the locking position, the plug-in box 10 is locked on the bus duct 80, at this time the top rod end 73 retracts, the box door 13 can be closed, the circuit breaker can be closed, and the bus duct 80 can distribute power normally.

[0079] like Figure 1 and Figure 4As shown, the middle part of the locking pin 30 is pivotally connected to the lower end of the side wall 14 of the box body 11 through the first pivot shaft 31, and the end of the locking pin 30 is pivotally connected to the bottom of the interlocking rod group 40 through the second pivot shaft 32. The interlocking rod group 40 moves up and down to drive the end of the locking pin 30 pivoted to the bottom of the interlocking rod group 40 to move up and down, and at the same time drives the locking pin 30 to rotate around the first pivot shaft 31 to achieve the conversion between the locked state and the unlocked state. The locking pin 30 can be symmetrically arranged, specifically symmetrically arranged relative to the operating rod 50 described below, so that in the locked state, the connection between the plug-in box 10 and the bus duct 80 is more stable.

[0080] The interlocking rod assembly 40 includes an operating rod 50, a driving rod 60 and an action rod 70. The operating rod 50 is used to operate the interlocking device 20 to move. The lower end of the operating rod 50 is pivotally connected to the locking foot 30 through the second pivot shaft 32, and the operating rod 50 can move vertically. The driving rod 60 can pivot around a third pivot shaft 61 located in the middle of the driving rod 60. The first rod end 64 of the driving rod 60 is connected to the action rod 70, and the second rod end 65 of the driving rod 60 is connected to the operating rod 50. The action rod 70 can move vertically. The movement of the operating rod 50 can drive the locking foot 30 to move vertically at the second pivot shaft 32, and drive the driving rod 60 to pivot, and then the driving rod 60 drives the action rod 70 to move vertically.

[0081] like Figure 4 and Figure 5 As shown, the operating rod 50 also has a gripping portion 51, which extends in a direction away from the side wall 14 of the box body 11. In other words, the gripping portion 51 extends outwardly away from the side wall 14 along a first direction. The gripping portion 51 is provided at the top of the operating rod 50, and the operating rod 50 can be manually pushed up and down through the gripping portion 51, which is convenient for the user to operate.

[0082] The upper end of the action rod 70 has a top rod end 73 that can interfere with the box door 13, and the vertical movement direction of the action rod 70 is opposite to the movement direction of the operating rod 50. When the operating rod 50 moves downward, the action rod 70 moves upward; when the operating rod 50 moves upward, the action rod 70 moves downward. The action rod 70 is provided with more than two first guide members 72, preferably, two first guide members 72 are provided, which can be fixed to the side wall 14 of the box body 11. The action rod 70 is provided with long first guide holes 71 at intervals, the first guide holes 71 are arranged vertically, and each first guide hole 71 is penetrated by a first guide member 72. Optionally, each first guide member 72 corresponds to a first guide hole 71. Such a setting can ensure that the action rod 70 moves smoothly in the vertical direction without deflection. The first guide member 72 can also be set as a fastener, such as a screw, to fix the action rod 70.

[0083] The operating rod 50 is connected to the action rod 70 through a second guide member 63, and the operating rod 50 is connected to the driving rod 60 through another second guide member 63. Long strip-shaped second guide holes 62 are respectively provided at the first rod end 64 and the second rod end 65 of the driving rod 60, and the second guide holes 62 are arranged along the length direction of the driving rod 60. A second guide member 63 is penetrated in each second guide hole 62, and the second guide member 63 can rotate inside the second guide hole 62 and move relatively along the length direction of the driving rod 60.

[0084] The operating rod 50 is provided with more than two third guide members 53, preferably, two third guide members 53 are provided, which can be fixed to the side wall 14 of the box body 11. The operating rod 50 is provided with long third guide holes 52 at intervals, the third guide holes 52 are arranged in the vertical direction, and each third guide hole 52 is penetrated by a third guide member 53. Optionally, each third guide member 53 corresponds to a third guide hole 52. Such a configuration can ensure that the operating rod 50 moves smoothly in the vertical direction without deflection.

[0085] The third guide member 53 can be set as a fastener, for example, a screw. A threaded hole can be set at the position corresponding to the third guide member 53 on the side wall 14 of the box body 11, and the operating rod 50 is kept in the locked position by tightening the fastener, and is kept in the movable state by loosening the fastener. In this way, by tightening the third guide member 53 and applying pressure to the operating rod 50, the position of the operating rod 50 can be fixed, so that the interlocking device 20 is kept in the locked position or the unlocked position. When it is kept in the locked position, it is ensured that the plug-in box 10 can be kept in the state locked to the bus duct 80, avoiding the plug-in box 10 from being unlocked due to accidentally pushing the operating rod 50; by loosening the third guide member 53, the interlocking device 20 can be kept in the movable state, so that the interlocking device 20 can be moved.

[0086] In specific operation, when the interlocking device 20 needs to be locked, the gripping portion 51 needs to be pushed upward to move the operating rod 50 vertically upward, driving the fixed ends of the two locking pins 30 to rotate around the second pivot axis 32 and move upward. The two locking pins 30 rotate around the first pivot axis 31 at the same time, so that the clamping ends of the two locking pins 30 are close to each other and clamped with the protrusions provided on the bus duct 80, so that the plug-in box 10 can be locked on the bus duct 80. At this time, the third guide member 53 is locked to keep the plug-in box 10 locked on the bus duct 80. At the same time, the operating rod 50 drives the second rod end 65 of the driving rod 60 to move upward, and the driving rod 60 rotates clockwise along the third pivot axis 61, driving the first rod end 64 to move downward, so that the action rod 70 can move downward, and at this time the top rod end 73 retracts, the box door 13 can be closed, and the circuit breaker can be closed.

[0087] When the interlocking device 20 needs to be unlocked, the box door 13 needs to be opened first to eliminate the interference between the box door 13 and the locking device 20. Then, the third guide member 53 is loosened, and the gripping portion 51 is pressed downward to move the operating rod 50 vertically downward, driving the fixed ends of the two locking feet 30 to rotate around the second pivot axis 32 and move downward. The two locking feet 30 rotate around the first pivot axis 31 at the same time, so that the clamping ends of the two locking feet 30 are away from each other and no longer clamped with the protrusions provided on the bus duct 80, so that the plug-in box 10 can be unloaded from the bus duct 80. The operating rod 50 also drives the second rod end 65 of the driving rod 60 to move downward, and the driving rod 60 rotates counterclockwise along the third pivot axis 61, driving the first rod end 64 to move upward, so that the action rod 70 can move upward, and when the box door 13 is opened, the circuit breaker cannot be closed.

[0088] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0089] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and explanation, and the present invention is not limited to the above-mentioned embodiments. According to the teachings of the present invention, more variations and modifications can be made, and these variations and modifications all fall within the scope of protection required by the present invention.

Claims

1. An interlocking device, used for a plug-in box (10) of a bus duct (80), the plug-in box (10) comprising a box body (11) with a top opening (12) and a box door (13), the box door (13) covering the top opening (12), characterized in that: The interlocking device (20) is located outside the box (11) and is provided on a side wall (14) of the box (11), and the interlocking device (20) moves between a locking position for engaging with the bus duct (80) and an unlocking position for disengaging from the bus duct (80), and comprises: A locking foot (30), the locking foot (30) being used for snapping into the bus duct (80); and a locking rod group (40), wherein the locking rod group (40) is connected to the locking foot (30) and is movable so as to drive the locking foot (30) to move between the locking position and the unlocking position, Wherein, the top rod end (73) of the interlocking rod group (40) retracts into the area corresponding to the side wall (14) to avoid the box door (13) when in the locking position, and extends upward from the top end of the side wall (14) to interfere with the closing of the box door (13) when in the unlocking position.

2. The interlocking device according to claim 1, characterized in that: The interlocking rod group (40) comprises an operating rod (50) for operating the interlocking device (20) to move; the operating rod (50) is connected to the locking foot (30) and is movable in the vertical direction to drive the locking foot (30) to move.

3. The interlocking device according to claim 2, characterized in that: The operating rod (50) has a gripping portion (51), and the gripping portion (51) extends in a direction away from the side wall (14) of the box body (11).

4. The interlocking device according to claim 3, characterized in that: The gripping portion (51) is arranged at the top end of the operating rod (50).

5. The interlocking device according to claim 2, characterized in that: The interlocking rod group (40) also includes a third guide member (53) for fixing to the side wall (14) of the box body (11); the operating rod (50) is provided with third guide holes (52) in an elongated shape at intervals; the third guide holes (52) are arranged in a vertical direction, and each of the third guide holes (52) is penetrated by the third guide member (53).

6. The interlocking device according to claim 5, characterized in that: The third guide member (53) is a fastener, and the operating rod (50) is held in the locking position by tightening the fastener, and is held in the movable state by loosening the fastener.

7. The interlocking device according to claim 2, characterized in that: The interlocking rod assembly (40) further comprises an action rod (70) and a driving rod (60), wherein the action rod (70) is movable in the vertical direction, and the driving rod (60) is pivotable about a third pivot axis (61) located in the middle of the driving rod (60), a first rod end (64) of the driving rod (60) is connected to the action rod (70), and a second rod end (65) of the driving rod (60) is connected to the operating rod (50). The action rod (70) has the push rod end (73) which can interfere with the box door (13), and the moving direction of the action rod (70) is opposite to the moving direction of the operating rod (50).

8. The interlocking device according to claim 7, characterized in that: The interlocking rod group (40) further comprises a second guide member (63), the driving rod (60) being respectively fixed to the action rod (70) and the operating rod (50) via the second guide member (63), the driving rod (60) being provided with long second guide holes (62) at intervals, the second guide holes (62) being arranged along the length direction of the driving rod (60), and each of the second guide holes (62) being provided with the second guide member (63).

9. The interlocking device according to claim 7, characterized in that: The interlocking rod group (40) also includes a first guide member (72) for fixing to the side wall (14) of the box body (11); the action rod (70) is provided with long first guide holes (71) at intervals; the first guide holes (71) are arranged vertically, and each of the first guide holes (71) is penetrated by the first guide member (72).

10. The interlocking device according to any one of claims 1 to 9, characterized in that: A first pivot shaft (31) for pivotally connecting to the side wall (14) is provided in the middle of the locking foot (30), and an end of the locking foot (30) is pivotally connected to the bottom of the interlocking rod group (40) via a second pivot shaft (32).

11. A plug-in box, characterized in that: The plug-in box (10) comprises a box body (11) with a top opening (12), a box door (13), and an interlocking device (20) according to any one of claims 1 to 10, wherein the box door (13) covers the top opening (12) and the box door (13) protrudes from a side wall (14) of the box body (11), and the interlocking device (20) is arranged on the side wall (14) of the box body (11). When the interlocking device (20) is in the locking position, the box door (13) can be closed, and when the interlocking device (20) is in the unlocking position, the box door (13) is interfered by the top rod end (73) of the interlocking device (20) to prevent the box door (13) from closing.

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