Locking device and plug box

Abstract

The utility model discloses a locking device and a jack box, the locking device is arranged in a box body and comprises a pair of locking feet, a driving member and an operation assembly, the pair of locking feet are arranged at intervals along a first direction, and each locking foot extends in a second direction perpendicular to the first direction; the driving piece is at least partially located between the pair of locking feet and reciprocates in the second direction, the fixed ends of the locking feet are pivoted to the end, in the first direction, of the driving piece, and the pair of locking feet pivot around the respective pivoting axes in the directions facing each other or away from each other relative to the driving piece; the operation assembly can be fixed to the box body and used for enabling the driving part to reciprocate in the second direction, and the operation assembly is connected with the driving part in the middle of the first direction. According to the utility model, the jack box can be locked on the bus duct through a simple movable mechanism formed by the locking device, so that the jack box and the bus duct are stably and reliably connected together; the locking device is simple in structure, the movement transmission path is short, and the operation of a user is labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a locking 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 in the bus duct. At present, the plug-in box is plugged into the bus duct and the two are locked together with a locking device. Most locking devices use a multi-stage connecting rod structure, which transmits motion through multiple connecting rods to lock and unlock the terminal of the locking device with the bus duct. This device has a complex structure, a long motion transmission path, and is laborious for users to operate.

[0003] Therefore, a locking 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 first aspect of the present invention provides a locking device for a plug-in box of a bus duct, the plug-in box comprising a box body, the locking device being arranged on the box body and comprising:

[0006] a pair of locking feet, the pair of locking feet are arranged at intervals along a first direction, and each of the locking feet extends in a second direction perpendicular to the first direction;

[0007] a driving member, the driving member being at least partially located between the pair of locking feet and reciprocating along the second direction, the fixed end of the locking foot being pivotally connected to the end of the driving member in the first direction, and the pair of locking feet pivoting relative to the driving member about respective pivot axes in directions toward or away from each other; and

[0008] An operating assembly, which can be fixed to the box and is used to make the driving member reciprocate along the second direction, and the operating assembly is connected to the driving member in the middle of the first direction.

[0009] According to this solution, the plug-in box can be locked on the bus duct by a simple movable mechanism formed by a locking device, so that the two are firmly and reliably connected together. A pair of locking pins for engaging with the bus duct can be driven by a driving member to generate a pivoting motion so that the locking pins move between a locking position and an unlocking position. When the locking pins pivot toward each other, that is, when moving from the unlocking position to the locking position, the locking pins can engage with the bus duct located between the pair of locking pins, thereby achieving the locking of the plug-in box and the bus duct. When the locking pins pivot away from each other, that is, when moving from the locking position to the unlocking position, the locking pins move away from the bus duct, so that the plug-in box is unlocked and can be separated from the bus duct. In addition, the user can drive the driving member to move back and forth through an operating component directly connected to the driving member. The locking device has a simple structure, a short motion transmission path, and a more labor-saving operation for the user.

[0010] Optionally, the locking foot is provided with a first elongated guide hole in the middle of the second direction, the first guide hole is inclined relative to the first direction, and the plug-in box also includes a first guide member, the first guide member can be fixed to the box body and passed through the first guide hole.

[0011] According to this solution, the locking foot can be movably supported on the box body; and there is guidance between the first guide hole and the first guide member, ensuring that the locking foot can smoothly pivot relative to the driving member without shaking.

[0012] Optionally, the driving member includes a driving member body and a fixing portion, wherein the driving member body is pivotally connected to the locking foot at the end portion in the first direction, the fixing portion is connected to the middle portion of the driving member body in the first direction and protrudes toward the side where the locking claw of the locking foot is located, and the fixing portion can be movably supported on the box body.

[0013] According to this solution, a position is selected from the middle of the driving member for its own fixation, which can balance the transmission force of the driving member at the two ends; and the fixed position of the driving member is spaced apart from the pivot position in the first direction and the second direction, so that there can be a larger space to set the fixed structure and the pivot structure, so as not to interfere with the pivoting of the locking foot.

[0014] Optionally, the driving member is provided with a second elongated guide hole in the middle of the first direction, the second guide hole extends along the second direction, and the plug-in box further comprises a second guide member, the second guide member can be fixed to the box body and passed through the second guide hole.

[0015] According to this solution, the driving member can be movably supported on the box body; and there is guidance between the second guide hole and the second guide member, ensuring that the driving member can move smoothly along the second direction without shaking or deflection.

[0016] Optionally, the second guide holes are arranged at intervals along the first direction, the second guide members are arranged at intervals along the first direction, and each of the second guide holes is provided with the second guide member.

[0017] According to this solution, the guide members arranged at intervals have a better guiding effect, which can make the driving member remain on the box more stably when moving; and provide a stable supporting force to the driving member when the driving member is not moving.

[0018] Optionally, the locking foot includes a first straight section, an inclined section and a second straight section connected in sequence, the first straight section has the fixed end pivotally connected to the driving member, the inclined section is inclined relative to the first straight section in a direction away from the center of the locking device, and the second straight section is provided with a locking claw.

[0019] According to this solution, the pair of locking feet are formed into an outwardly expanded shape, so that the distance between the two claws is greater than the distance between the two fixed ends, and the structure for fixing the locking feet is arranged at the fixed ends with a smaller distance, so that the space occupied by the locking foot device on the box body can be reduced.

[0020] Optionally, the fixed ends of the locking feet are provided with a pivot shaft for defining the pivot axis, the axial direction of the pivot shaft is perpendicular to the first direction and the second direction, and the fixed ends of the locking feet are pivotally connected to the end of the driving member through the pivot shaft.

[0021] According to this solution, the locking foot can be connected to the driving member by setting a pivot shaft to ensure the pivoting of the locking foot; the pivot structure is simple and easy to assemble and manufacture.

[0022] Optionally, the operating assembly includes a connecting rod and an operating part, the operating part is connected to the driving member through the connecting rod, and the operating part can be rotated between a locking position close to the box body and an unlocking position away from the box body to drive the connecting rod to move, thereby causing the driving member to reciprocate.

[0023] According to this solution, the user can grasp the operating part and rotate it, thereby pulling or pushing the driving member to move along the second direction via the connecting rod; the operation method is simple and easy.

[0024] Optionally, the operating assembly is a snap lock, and the snap lock is switchable between an open state and a closed state to allow the driving member to reciprocate.

[0025] According to this solution, opening the buckle lock can cause the locking legs to pivot away from each other, and the plug-in box is unlocked and can be separated from the bus duct; closing the buckle lock can cause the legs to pivot toward each other, and the plug-in box is locked to the bus duct.

[0026] According to another aspect of the utility model, a plug-in box is provided for a bus duct, the plug-in box comprising a box body and a locking device according to any of the above aspects, the locking device is arranged on the box body, and the locking claws of the pair of locking feet are used to be clamped to the bus duct.

[0027] According to this solution, the plug-in box can be locked on the bus duct through a simple movable mechanism formed by a locking device, so that the two are firmly and reliably connected together. The locking device has a simple structure, a short motion transmission path, and the user's operation is less labor-intensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] In the attached figure:

[0030] Figure 1 It is a three-dimensional diagram of the plug-in box according to the utility model, wherein the locking device is located in the locking position;

[0031] Figure 2 for Figure 1 Another perspective view of the plug box shown in , wherein the locking device is in the unlocked position;

[0032] Figure 3 for Figure 1 A side view of the plug-in box locked on the bus duct shown in;

[0033] Figure 4 for Figure 1 An exploded view of the locking device shown in ;

[0034] Figure 5 for Figure 1 Another perspective view of the plug-in box shown in , in which the locking device is covered by the baffle.

[0035] Description of reference numerals:

[0036] 1 Plug-in box 2 Locking device

[0037] 3 bus duct 10 box

[0038] 11 top wall 12 side wall

[0039] 20 locking foot 21 locking claw

[0040] 22 free end 23 fixed end

[0041] 24 first guide hole 25 first straight section

[0042] 26 oblique section 27 second straight section

[0043] 30 driving member 31 driving member body

[0044] 32 fixing portion 33 second guide hole

[0045] 40 operating assembly 41 connecting rod

[0046] 42 operating portion 43 buckle body

[0047] 44 lock seat 45 pin

[0048] 46 engagement portion 47 bayonet

[0049] 51 pivot shaft 52 first guide member

[0050] 53 second guide member 54 baffle

[0051] 55 Avoidance exit D1 first direction

[0052] D2 Second direction D3 Axial direction DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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".

[0057] 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.

[0058] 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.

[0059] like Figures 1 to 3 As shown, the utility model provides a plug-in box 1, which can be installed on the bus duct 3, and the plug-in box 1 is used to distribute electric energy. In order to lock the plug-in box 1 on the bus duct 3, the plug-in box 1 also includes a box body 10 and a locking device 2. The locking device 2 is arranged on the box body 10. Specifically, the box body 10 is constructed as a rectangular parallelepiped structure, and the top wall 11 of the box body 10 extending in the length direction and the width direction can abut against the bus duct 3; the side walls 12 of the box body 10 in the width direction and the height direction can be provided with the locking device 2. In other words, the locking device 2 is arranged in the height direction of the box body 10. The two side walls 12 of the box body 10 in the length direction are provided with locking devices 2.

[0060] It should be noted that the directional terms used in this article, such as "top", "bottom", "up", "down", "vertical", "height direction", "horizontal direction", etc., are relative to the direction of the Figure 1 This is for the plug-in box 1 which is placed upright as shown.

[0061] The locking device 2 may include a pair of locking pins 20, a driving member 30 and an operating assembly 40. The pair of locking pins 20 are each provided with a locking claw 21 and the locking claws 21 are opposite to each other. The driving member 30 can drive the locking pins 20 to move, and the operating assembly 40 is convenient for the user to operate so as to move the driving member 30.

[0062] Specifically, the pair of locking pins 20 are arranged at intervals along the first direction D1, and each locking pin 20 extends in a second direction D2 perpendicular to the first direction D1. Further, the locking pin 20 is in the shape of an elongated strip, and its length direction corresponds to the second direction D2. For the illustrated embodiment, the first direction D1 corresponds to the width direction of the box body 10, and the second direction D2 corresponds to the height direction of the box body 10. The locking pin 20 has the locking claw 21 at one end in the second direction D2, and the other end is used to be fixed to the driving member 30, that is, the locking pin 20 has a free end 22 with the locking claw 21 and a fixed end 23 for fixing in the second direction D2. The locking claw 21 of the locking pin 20 extends beyond the top end of the box body 10. The pair of locking pins 20 pivot relative to the driving member 30 in a direction toward each other, Figure 1 The locking feet 20 are shown pivoted toward each other to a locked position. Or the pair of locking feet 20 are pivoted away from each other relative to the drive member 30, Figure 2 The locking feet 20 are shown pivoted away from each other to an unlocked position. Figure 3 It is shown that the locking foot 20 can be snapped into the bus duct 3 when in the locked position.

[0063] The driving member 30 is at least partially located between the pair of locking pins 20 and reciprocates along the second direction D2. The second direction D2 is the driving direction of the driving member 30. The fixed end 23 of the locking pin 20 can be pivotally connected to the end of the driving member 30 in the first direction D1. The illustrated embodiment schematically shows that the driving member 30 is partially located between the locking pins 20 and overlaps with the locking pin 20 at the pivoting position. Taking the illustrated embodiment as an example, the driving member 30 moves back and forth from Figure 1 Move the locking position upward to Figure 2 In the unlocked position shown, the locking feet 20 are pivoted away from each other; conversely, the drive member 30 moves downwardly and the locking feet 20 are pivoted towards each other.

[0064] The operating assembly 40 can be fixed to the box 10, for example, by fasteners such as screws. The operating assembly 40 can make the driving member 30 reciprocate along the second direction D2, that is, reciprocate between its locked position and unlocked position. The operating assembly 40 is connected to the driving member 30 in the middle of the first direction D1.

[0065] With such a configuration, the plug-in box 1 can be locked on the bus duct 3 by a simple movable mechanism formed by the locking device 2, so that the two can be firmly and reliably connected together. The pair of locking pins 20 for engaging with the bus duct 3 can be driven by the driving member 30 to generate a pivoting motion so that the locking pins 20 move between the locking position and the unlocking position. When the locking pins 20 pivot toward each other, that is, when they move from the unlocking position to the locking position, the locking pins 20 can engage with the bus duct 3 located between the pair of locking pins 20 (such as Figure 3As shown in the figure), the plug-in box 1 and the bus duct 3 are locked. When the locking pins 20 are pivoted away from each other, that is, when they move from the locked position to the unlocked position, the locking pins 20 are away from the bus duct 3, so that the plug-in box 1 is unlocked and can be separated from the bus duct 3. In addition, the user can drive the driving member 30 to move back and forth through the operating component 40 directly connected to the driving member 30. The locking device 2 has a simple structure, a short motion transmission path, and the user's operation is less labor-intensive.

[0066] like Figure 4 As shown, the fixed end 23 of the locking pin 20 is provided with a pivot shaft 51 for defining a pivot axis. The axial direction D3 of the pivot shaft 51 is perpendicular to the first direction D1 and the second direction D2. For the illustrated embodiment, the axial direction D3 corresponds to the length direction of the box body 10. The fixed end 23 of the locking pin 20 can be pivoted with the end of the driving member 30 through the pivot shaft 51. The pivot shaft 51 can be set as a fastener, such as a screw, so as to fix the locking pin 20 and the driving member 30. By setting the pivot shaft 51, the locking pin 20 can be connected to the driving member 30 to ensure the pivoting of the locking pin 20; the pivot structure is simple and easy to assemble and manufacture.

[0067] The locking foot 20 is provided with a long first guide hole 24 in the middle of the second direction D2. The first guide hole 24 is inclined relative to the first direction D1, or relative to the second direction D2 or the driving direction of the driving member 30. More specifically, the length direction of the first guide hole 24 or the extension direction of its length is inclined relative to the first direction D1. The plug-in box 1 also includes a first guide member 52, which can be fixed to the box body 10 and penetrated into the first guide hole 24. With the help of the first guide member 52, the locking foot 20 can be movably supported on the box body 10. In other words, the first guide member 52 provides support for the locking foot 20; and there is a guide between the first guide hole 24 and the first guide member 52 to ensure that the locking foot 20 can be smoothly pivoted relative to the driving member 30 without shaking. The first guide hole 24 can be a waist-shaped hole. The first guide member 52 can be set as a fastener, such as a screw, to fix the locking foot 20.

[0068] Optionally, the locking foot 20 includes a first straight section 25, an inclined section 26, and a second straight section 27 connected in sequence. The first straight section 25 has a fixed end 23, which can be connected to the driving member 30. The inclined section 26 is inclined relative to the first straight section 25 in a direction away from the center of the locking device 2. The second straight section 27 has a free end 22 and is provided with a locking claw 21. The first guide hole 24 is located in the first straight section 25, and the first straight section 25 supports the locking foot 20. In this arrangement, the pair of locking feet 20 forms an outward expansion shape, so that the distance between the two claws is greater than the distance between the two fixed ends 23, and the structure for fixing and supporting the locking foot 20 is arranged in the first straight section 25 with a smaller distance, wherein the fixing structure is arranged at the fixed end 23. The space occupied by the locking foot 20 device on the box body 10 can be reduced.

[0069] The driving member 30 includes a driving member body 31 and a fixing portion 32. The driving member body 31 is pivotally connected to the corresponding locking foot 20 at the end in the first direction D1, and the fixing portion 32 is connected to the driving member body 31 in the middle of the first direction D1 and protrudes toward the side where the locking claw 21 of the locking foot 20 is located, and the fixing portion 32 can be movably supported on the box body 10. Selecting a position from the middle of the driving member 30 for its own fixing can balance the transmission force of the driving member 30 at both ends; and the fixing position of the driving member 30 is spaced apart from the pivoting position in both the first direction D1 and the second direction D2, so that there can be a large space to set the fixing structure and the pivoting structure, so as not to interfere with the pivoting of the locking foot 20.

[0070] The driving member 30 is provided with a second long guide hole 33 in the middle of the first direction D1, and the second guide hole 33 extends along the second direction D2, or in other words, extends along the driving direction of the driving member 30. More specifically, the length direction of the second guide hole 33 or the extension direction of its length corresponds to the second direction D2. The plug-in box 1 also includes a second guide member 53, which can be fixed to the box body 10 and penetrated into the second guide hole 33. With the help of the second guide member 53, the driving member 30 can be movably supported on the box body 10. In other words, the second guide member 53 provides support for the driving member 30; and there is a guide between the second guide hole 33 and the second guide member 53, ensuring that the driving member 30 can move smoothly along the second direction D2 without shaking or deflection. The second guide hole 33 can be a waist-shaped hole. The second guide member 53 can be set as a fastener, such as a screw, to fix the driving member 30.

[0071] The second guide holes 33 are arranged at intervals along the first direction D1, the second guide members 53 are arranged at intervals along the first direction D1, and each first guide hole 24 is provided with a second guide member 53. Optionally, two second guide holes 33 and two second guide members 53 may be provided, and the second guide members 53 correspond to the first guide holes 24 one by one. The second guide members 53 arranged at intervals have a better guiding effect, and can make the driving member 30 more stably remain on the box body 10 when moving; and provide a stable supporting force to the driving member 30 when the driving member 30 does not move.

[0072] The operating assembly 40 is located on the side of the driving member 30 away from the locking claw 21 of the locking foot 20. Thus, the locking foot 20 and the operating assembly 40 are respectively located on both sides of the driving member 30 in the second direction D2. The space for arranging the operating assembly 40 can be reasonably utilized. The operating assembly 40 may include a connecting rod 41 and an operating portion 42. The operating portion 42 is connected to the driving member 30 through the connecting rod 41, and the operating portion 42 can rotate to drive the connecting rod 41 to move, thereby causing the driving member 30 to reciprocate. The user can grasp the operating portion 42 and rotate it, thereby pulling or pushing the driving member 30 to move along the second direction D2 via the connecting rod 41; the operation method is simple and easy.

[0073] Optionally, the operating assembly 40 is a snap lock. The snap lock includes a buckle body 43, which is connected to the driving member 30, for example, it can be connected to the middle of the driving member 30 in the first direction D1. The snap lock also includes a lock seat 44, the above-mentioned connecting rod 41 and a lock cover as an operating part 42. The lock seat 44 is fixed to the box body 10, the connecting rod 41 is buckled to the hook part of the buckle body 43, and the lock cover is connected to the lock seat 44 through a pin 45 and can rotate relative to the lock seat 44 around the pin 45. The pin 45 is sleeved with a biasing element, such as a spring, to provide elastic force to the lock cover to assist in opening the lock cover. The lock seat 44 is provided with a snap-fitting portion 46, and the lock cover is provided with a corresponding snap-fitting port 47. The snap-fitting portion 46 can extend from the snap-fitting port 47. Optionally, the snap-fitting portion 46 is snap-fitted to the snap-fitting port 47 to achieve locking; or the snap-fitting portion 46 is provided with a lock hole for installing a padlock to achieve locking. Installing a padlock on the engaging portion 46 can prevent the hasp lock from being accidentally opened, thereby ensuring the safety of the hasp lock.

[0074] The hasp lock has an open state and a closed state, wherein in the open state, the lock cover rotates upward to the open position, and in the closed state, the lock cover rotates downward to the closed position, and the engaging portion 46 extends from the bayonet 47 for locking. It should be noted that Figure 2 The hasp lock is shown in the closed position, but Figure 2 The hasp lock in the case should be open.

[0075] The buckle lock can be switched between an open state and a closed state to reciprocate the drive member 30. The opening of the buckle lock can make the locking feet 20 pivot away from each other, and the plug-in box 1 is unlocked and can be separated from the bus duct 3; the closing of the buckle lock can make the feet pivot toward each other, and the plug-in box 1 is locked to the bus duct 3.

[0076] When installing the plug-in box 1, it is necessary to first rotate the lock cover to open the buckle lock, the driving member 30 is moved upward, and the locking pins 20 are driven to pivot away from each other and are in an open state. Then, the plug-in box 1 is positioned to the bus duct 3. Then, the lock cover is rotated to close the buckle lock, the driving member 30 is moved downward, and the locking pins 20 are driven to pivot toward each other and are in a close state; at this time, the locking claws 21 of the locking pins 20 are clamped to the bus duct 3. The plug-in box 1 and the bus duct 3 are installed in place.

[0077] Alternatively, if Figure 5 As shown, the box 10 is further provided with a baffle 54, which is located on the outer side of the locking device 2 away from the box 10. The baffle 54 covers the locking device 2 and hides the locking device 2, so that the external structure of the plug-in box 1 is neat, which improves the user experience. The baffle 54 is provided with an escape opening 55, and the operating component 40 is exposed from the escape opening 55 to operate the operating component 40. The free end 22 of the locking foot 20 extends from the baffle 54, so that the locking claw 21 at the free end 22 is engaged with the bus duct 3. The baffle 54 can be fixed to the box 10 by fasteners such as screws.

[0078] 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.

[0079] 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. A locking device, used for a plug-in box (1) of a bus duct (3), the plug-in box (1) comprising a box body (10), characterized in that: The locking device (2) is arranged on the box body (10) and comprises: A pair of locking pins (20), the pair of locking pins (20) are arranged at intervals along a first direction (D1), and each of the locking pins (20) extends in a second direction (D2) perpendicular to the first direction (D1); a driving member (30), the driving member (30) being at least partially located between the pair of locking feet (20) and reciprocating along the second direction (D2), the fixed end (23) of the locking foot (20) being pivotally connected to the end of the driving member (30) in the first direction (D1), the pair of locking feet (20) pivoting relative to the driving member (30) around respective pivot axes in directions toward or away from each other; and An operating assembly (40) can be fixed to the housing (10) and is used to make the driving member (30) reciprocate along the second direction (D2); the operating assembly (40) is connected to the driving member (30) in the middle of the first direction (D1).

2. The locking device according to claim 1, characterized in that: The locking foot (20) is provided with a first elongated guide hole (24) in the middle of the second direction (D2), and the first guide hole (24) is inclined relative to the first direction (D1). The plug-in box (1) also includes a first guide member (52), and the first guide member (52) can be fixed to the box body (10) and passed through the first guide hole (24).

3. The locking device according to claim 1, characterized in that: The driving member (30) comprises a driving member body (31) and a fixing portion (32); the driving member body (31) is pivotally connected to the locking foot (20) at an end portion in the first direction (D1); the fixing portion (32) is connected to the driving member body (31) at a middle portion in the first direction (D1) and protrudes toward the side where the locking claw (21) of the locking foot (20) is located; and the fixing portion (32) can be movably supported on the box body (10).

4. The locking device according to claim 1, characterized in that: The driving member (30) is provided with a second elongated guide hole (33) in the middle of the first direction (D1), and the second guide hole (33) extends along the second direction (D2). The plug-in box (1) also includes a second guide member (53), and the second guide member (53) can be fixed to the box body (10) and passed through the second guide hole (33).

5. The locking device according to claim 4, characterized in that: The second guide holes (33) are arranged at intervals along the first direction (D1), the second guide members (53) are arranged at intervals along the first direction (D1), and each of the second guide holes (33) is provided with a second guide member (53).

6. The locking device according to any one of claims 1 to 5, characterized in that: The locking foot (20) comprises a first straight section (25), an inclined section (26) and a second straight section (27) which are connected in sequence, the first straight section (25) having the fixed end (23) pivotally connected to the driving member (30), the inclined section (26) being inclined relative to the first straight section (25) in a direction away from the center of the locking device (2), and the second straight section (27) being provided with a locking claw (21).

7. The locking device according to any one of claims 1 to 5, characterized in that: The fixed end (23) of the locking foot (20) is provided with a pivot shaft (51) for defining the pivot axis, the axial direction (D3) of the pivot shaft (51) is perpendicular to the first direction (D1) and the second direction (D2), and the fixed end (23) of the locking foot (20) is pivotally connected to the end of the driving member (30) via the pivot shaft (51).

8. The locking device according to any one of claims 1 to 5, characterized in that: The operating assembly (40) comprises a connecting rod (41) and an operating portion (42); the operating portion (42) is connected to the driving member (30) via the connecting rod (41); the operating portion (42) can rotate to drive the connecting rod (41) to move, thereby causing the driving member (30) to move back and forth.

9. The locking device according to any one of claims 1 to 5, characterized in that: The operating assembly (40) is a buckle lock, which can be switched between an open state and a closed state to enable the driving member (30) to reciprocate.

10. A plug-in box, used for a bus duct (3), characterized in that: The plug-in box (1) comprises a box body (10) and a locking device (2) according to any one of claims 1 to 9, wherein the locking device (2) is arranged on the box body (10), and the locking claws (21) of the pair of locking feet (20) are used to be clamped to the bus duct (3).

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