Over-voltage, under-voltage, overcurrent and overload intelligent protection switch

Abstract

The utility model discloses an over-voltage, under-voltage, over-current and over-load intelligent protection switch, which comprises wiring terminals arranged in wiring cavities at two ends of a shell, operation holes opposite to the wiring terminals are arranged on the top side of the shell, and slot structures connected between the wiring cavities and the operation holes are respectively arranged at two ends of the shell. A movable blocking plate is inserted into the slot structure, the blocking plate is provided with a locking part which keeps relative position locking with the slot structure in a closed state, and an anti-falling structure which is used for preventing the blocking plate from falling out of the slot structure in an open state is arranged between the locking plate and the slot structure. According to the switching device adopting the technical scheme, the wiring terminal is shielded by the blocking plate, so that external personnel can be prevented from mistakenly operating or mistakenly touching the wiring terminal, electric shock accidents are avoided, the safety protection effect on the wiring terminal is achieved, the safety and reliability of product use are ensured, and the use performance of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an over-voltage, under-voltage, over-current and overload intelligent protection switch. Background Art

[0002] With the development of the Internet of Things and smart grids, especially with the introduction of the concept of "ubiquitous power Internet of Things", distribution terminal equipment needs to have the functions of monitoring data, transmitting data and even individual metering, and transmitting power consumption information to the background for integration and analysis. This is an inevitable trend for the intelligentization of perception layer equipment. Most of the current reclosing switches only have traditional circuit protection functions, do not support sub-item power metering of power circuits, do not have the technical basis for carrying out power demand side management, and have a low degree of intelligence, which cannot meet the development trend of the power Internet of Things.

[0003] To this end, some smart switches such as Internet of Things switches and over- and under-voltage protection switches have appeared on the market. These smart switches refer to switch electrical appliances that use a combination of circuit boards and electronic components and programming to achieve circuit intelligent switch control. For easy installation and use, the smart switch is usually installed on the guide rail of the distribution box, and then the line is connected to the wiring terminals at both ends of the smart switch. However, the existing smart switches still have some problems in actual use: 1. The wiring terminal position of the smart switch lacks effective safety restriction measures, and there is a risk of accidental touching and misoperation, which is prone to electric shock accidents, and has poor safety and reliability; 2. Since the smart switch contains multiple circuit boards, these circuit boards are usually installed in the switch housing by screws, and the installation process is cumbersome, the installation efficiency is low, and the manufacturing cost is increased. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems in the prior art that the connection terminal positions of intelligent switch electrical appliances are at risk of being accidentally touched and misoperated, prone to electric shock accidents, and have poor safety and reliability.

[0005] In order to solve the above technical problems, the utility model provides an over-voltage, under-voltage, over-current and overload intelligent protection switch, including a shell and a wiring cavity arranged at both ends of the shell, and a wiring terminal accommodated in the wiring cavity. The top side of the shell is provided with an operating hole opposite to the wiring terminal, and both ends of the shell are respectively provided with a slot structure connected between the wiring cavity and the operating hole. A movable blocking plate is inserted in the slot structure, and the blocking plate has a closed state that blocks the wiring terminal and an open state that exposes the wiring terminal. The blocking plate is provided with a locking portion that maintains a relative position locked with the slot structure in the closed state, and an anti-slip structure is provided between the blocking plate and the slot structure for preventing the blocking plate from slipping out of the slot structure in the open state.

[0006] As a preferred embodiment, the locking portion includes at least one buffer groove arranged on the blocking plate, and a baffle structure extending and formed in the at least one buffer groove and elastically deformable under pressure. When the blocking plate is inserted into the slot structure, the baffle structure is squeezed into contact with the inner wall of the slot structure and is connected at the lower end of the operating hole.

[0007] As a preferred solution, the locking portion includes a positioning buckle arranged on the baffle structure, and when the baffle structure is connected to the lower end of the operating hole, it drives the positioning buckle to engage and abut against the operating hole.

[0008] As a preferred solution, the locking portion includes two elastic clamping arms arranged on the side edges of the blocking plate, and the side walls of the slot structure are correspondingly provided with a clamping platform structure that forms a limiting fit with the two elastic clamping arms.

[0009] As a preferred solution, the anti-slip structure includes an elastic anti-slip rod arranged on the inner end of the blocking plate, a stop buckle arranged at the bottom of one end of the elastic anti-slip rod, and a stop groove corresponding to the opening of the slot structure, and the stop groove is located on the movement path of the elastic anti-slip rod. When the blocking plate moves out of the slot structure, the elastic anti-slip rod drives the stop buckle to be locked in the stop groove.

[0010] As a preferred solution, two operating holes are respectively provided on the top sides of the two ends of the shell, and the blocking plate is correspondingly provided with two baffle structures. The blocking plate is provided with a U-shaped groove located between the two baffle structures, and one end of the elastic anti-slip rod is connected to the closed end of the U-shaped groove, and the other end thereof extends to the open end of the U-shaped groove.

[0011] As a preferred solution, at least one guide slot extending along the insertion direction of the blocking plate is provided in the slot structure, and at least one guide edge slidably connected to the guide slot is correspondingly provided on the blocking plate.

[0012] As a preferred solution, the outer end of the blocking plate is an arc end extending out of the slot structure, and the two ends of the shell are respectively provided with padlock parts opposite to the arc end up and down, and the padlock part and the arc end are respectively provided with locking holes, and the locking holes can be used to penetrate the lead blockade.

[0013] As a preferred solution, it also includes a plurality of circuit boards distributed in a stacked structure in the housing, and the plurality of circuit boards and the housing are kept in fixed relative position via a connection structure.

[0014] As a preferred embodiment, the shell includes a base and a shell cover, and the connecting structure includes a plurality of groups of mounting slots spaced apart on the side walls on both sides of the base along the height direction of the base, and a plurality of groups of mounting blocks respectively arranged on the sides of both sides of the plurality of circuit boards and plugged into the plurality of groups of mounting slots. When the shell cover is installed on the base, it presses against the circuit board located at the top.

[0015] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0016] The switch electrical appliance adopting the technical scheme has the effect of shielding and preventing accidental touch of the wiring terminal located below the operating hole through the blocking plate, thereby ensuring the safety and reliability of the product and improving the product performance.

[0017] 2. In an over-voltage, under-voltage, overcurrent and overload intelligent protection switch provided by the utility model, a baffle structure that can be elastically deformed under pressure is provided in the buffer slot of the blocking plate, and a positioning buckle is provided on the baffle structure. The advantage of such a design is that the baffle structure is driven by the blocking plate to be inserted into the slot structure, and the installation and clamping of the blocking plate is achieved through the extrusion contact between the baffle structure and the inner wall of the slot structure, and the positioning buckle is clamped in the operating hole to form a positioning fit, so that the baffle structure is inserted into the lower end position of the operating hole and covers the wiring terminal. Such an installation can prevent the blocking plate from sliding back in the closed state, thereby ensuring the stability and reliability of the installation of the blocking plate. In addition, when it is necessary to open the blocking plate, the baffle structure is pressed at the operating hole position to disengage the positioning buckle from the operating hole, so that the blocking plate can be pulled out to transition from the closed state to the open state.

[0018] 3. In an over-voltage, under-voltage, overcurrent and overload intelligent protection switch provided by the utility model, an elastic anti-slip rod is provided at the inner end of the blocking plate, and a corresponding anti-slip groove is provided at the opening of the slot structure, which is located on the movement path of the elastic anti-slip rod. According to this structural arrangement, when the blocking plate is pulled to move out of the slot structure, the anti-slip buckle of the elastic anti-slip rod will be driven to be clamped in the anti-slip groove, and the blocking plate can be limited to continue to move outward through the limit cooperation formed by the anti-slip buckle and the anti-slip groove. In this way, the blocking plate can be prevented from detaching from the slot structure, thereby playing a role of limiting and stopping.

[0019] 4. In an over-voltage, under-voltage, overcurrent and overload intelligent protection switch provided by the utility model, a locking hole is provided on the arc end of the blocking plate extending out of the slot structure, and a padlock part with a locking hole is correspondingly provided at both ends of the shell. This structural design realizes the lead lock fixation of the blocking plate in the closed state by connecting the lead lock in the locking hole between the padlock part and the arc end. In this way, the blocking plate cannot be pulled out at will, and any direct operation on the wiring terminals of the switch electrical appliance cannot be performed, further strengthening the protection of the wiring terminals, thereby avoiding the occurrence of misoperation or electric shock caused by informal operation, having good safety precautions, improving the safety of outdoor use, and facilitating the effective management of power operations, and having good practicality.

[0020] 5. In an over-voltage, under-voltage, over-current and overload intelligent protection switch provided by the utility model, a plurality of circuit boards distributed in a stacked structure are installed in a shell. According to the shell being composed of a base and a shell cover, a plurality of groups of mounting blocks are respectively provided on the side edges of the plurality of circuit boards, and a plurality of groups of mounting slots are correspondingly provided on the side walls of the base. The circuit boards are squeezed and loaded onto the base, and the mounting blocks are squeezed and inserted into the mounting slots to realize the installation and fixation between the circuit boards and the base. In this way, the plurality of circuit boards are installed on the base one by one in sequence, and finally the shell cover is installed on the base to complete the assembly. The installation structure of the circuit board is simple, the whole process realizes tool-free installation, reduces the installation parts, and the installation and disassembly are very convenient, which is conducive to improving the installation efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the over-voltage, under-voltage, over-current and overload intelligent protection switch of the utility model;

[0023] Figure 2It is a schematic diagram of the separate structure of the blocking plate and the shell of the utility model;

[0024] Figure 3 for Figure 1 A partial cross-sectional structural diagram of an over-voltage, under-voltage, over-current and overload intelligent protection switch is shown;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the blocking plate of the utility model;

[0026] Figure 5 It is a bottom view of the blocking plate of the utility model;

[0027] Figure 6 It is a schematic diagram of the split structure of the over-voltage, under-voltage, over-current and overload intelligent protection switch of the utility model, and particularly shows the LED display screen;

[0028] Figure 7 It is another split structure schematic diagram of the over-voltage, under-voltage, over-current and overload intelligent protection switch of the utility model, and particularly shows a liquid crystal display screen;

[0029] Figure 8 This is a schematic diagram of the installation structure of the circuit board of the utility model;

[0030] Explanation of the reference numerals: 1. Shell; 11. Wiring cavity; 12. Operating hole; 13. Base; 14. Shell cover; 15. Transparent cover; 16. Mounting slot; 2. Slot structure; 21. Retraction groove; 22. Guide slide groove; 3. Blocking plate; 31. Elastic anti-slip rod; 32. Retraction buckle; 33. U-shaped groove; 34. Guide slide edge; 35. Arc end; 4. Locking part; 41. Baffle structure; 42. Buffer slot; 43. Positioning buckle; 6. Padlock part; 7. Locking hole; 8. Circuit board; 81. Mounting card block; 9. Wiring terminal; 101. LED display; 102. LCD display. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] Example

[0036] The present embodiment is described in detail below with reference to the accompanying drawings:

[0037] This embodiment provides Figure 1-8 The over-voltage, under-voltage, over-current and overload intelligent protection switch shown in the figure includes a shell 1 and a wiring cavity 11 arranged at both ends of the shell 1, and a wiring terminal 9 accommodated in the wiring cavity 11. The top side of the shell 1 is provided with an operating hole 12 opposite to the wiring terminal 9, and both ends of the shell 1 are respectively provided with a slot structure 2 connected between the wiring cavity 11 and the operating hole 12. A movable blocking plate 3 is inserted in the slot structure 2. The blocking plate 3 has a closed state that blocks the wiring terminal 9 and an open state that exposes the wiring terminal 9. The blocking plate 3 is provided with a locking portion 4 that maintains a relative position locked with the slot structure 2 in the closed state, and an anti-slip structure is provided between the blocking plate and the slot structure 2 for preventing the blocking plate 3 from slipping out of the slot structure 2 in the open state.

[0038] In the above embodiment, the blocking plate 3 is inserted into the slot structure 2 at both ends of the shell 1 to separate the wiring cavity 11 and the operating hole 12 up and down, so that the blocking plate 3 just covers the wiring terminal 9 in the closed state, which can effectively prevent outsiders from misoperating or touching the wiring terminal 9 at the operating hole 12 position to avoid electric shock accidents, thereby providing safety protection for the wiring terminal 9. When the wiring terminal 9 needs to be operated, the blocking plate 3 can be opened to expose the wiring terminal 9 by pulling the blocking plate 3 out of the slot structure, which facilitates the wiring operation. In this process, the anti-slip structure plays a role of limiting and preventing the blocking plate 3 moving outward, ensuring that the blocking plate 3 in the open state is still connected to the slot structure 2, and at the same time will not interfere with the wiring operation of the wiring terminal, which can prevent the blocking plate from falling off and being lost. The switch electrical appliance adopting this technical solution uses the blocking plate to shield and prevent accidental touch of the wiring terminal located below the operating hole, thereby ensuring the safety and reliability of product use and improving product performance.

[0039] Combine the following Figure 1 , Figure 4-5 The specific setting method of the locking part is described in detail:

[0040] As a preferred embodiment, the locking portion 4 includes at least one buffer groove 42 arranged on the blocking plate 3, and a baffle structure 41 which is extended and formed in the at least one buffer groove 42 and can be elastically deformed under pressure. When the blocking plate 3 is inserted into the slot structure 2, the baffle structure 41 is squeezed and contacted with the inner wall of the slot structure 2, and is connected to the lower end of the operating hole 12, wherein the locking portion 4 also includes a positioning buckle 43 arranged on the baffle structure 41, and when the baffle structure 41 is connected to the lower end of the operating hole 12, it drives the positioning buckle 43 to cooperate and be clamped in the operating hole 12. The advantage of such a design is that when the blocking plate 3 drives the baffle structure 41 to be inserted into the slot structure 2, the blocking plate 3 is installed and clamped by the extrusion contact between the baffle structure 41 and the inner wall of the slot structure 2, and the positioning buckle 43 is clamped in the operating hole 12 to form a positioning fit, so that the baffle structure 41 is inserted into the lower end position of the operating hole 12 and blocks the wiring terminal 9. Such an installation can prevent the blocking plate 3 from slipping back in the closed state, thereby ensuring the stability and reliability of the installation of the blocking plate 3. In addition, when the blocking plate 3 needs to be opened, the positioning buckle 43 can be disengaged from the operating hole 12 by pressing the baffle structure 41 at the position of the operating hole 12, so that the blocking plate can be pulled from the closed state to the open state.

[0041] As an alternative to the above, the locking portion 4 includes two elastic clamping arms arranged on the side edges of the blocking plate 3, and the side walls of the slot structure 2 are correspondingly provided with a card platform structure that forms a limit fit with the two elastic clamping arms. When the blocking plate 3 drives the two elastic clamping arms to be inserted into the slot structure 2, the two elastic clamping arms are correspondingly clamped against the two card platform structures, so that the blocking plate is fixedly connected to the slot structure in the closed state. When the elastic clamping arms are pressed by external force, they are released from the card platform structure to release the limit fit, so that the blocking plate can be moved open to expose the wiring terminals. Those skilled in the art can make a choice of the specific structure of the locking portion based on the above description, and will not be repeated here.

[0042] The following is combined Figure 3-5 The specific structure of the anti-slip structure is described in detail:

[0043] The anti-slip structure includes an elastic anti-slip rod 31 arranged on the inner end of the blocking plate 3, a stop buckle 32 arranged at the bottom of one end of the elastic anti-slip rod 31, and a stop groove 21 correspondingly arranged at the opening of the slot structure 2, wherein the stop groove is located on the movement path of the elastic anti-slip rod 31. With this structural arrangement, when the blocking plate 3 is pulled outward from the slot structure 2 by an external force, the stop buckle 32 of the elastic anti-slip rod 31 will be driven to be stuck in the stop groove 21, and the stop buckle 32 and the stop groove 21 form a limiting cooperation to limit the blocking plate from continuing to move outward, thereby preventing the blocking plate from detaching from the slot structure, thereby playing a role of limiting and stopping.

[0044] As a specific structural setting, two operating holes 12 are respectively provided on the top sides of the two ends of the housing 1, and the blocking plate 3 is correspondingly provided with two buffer slots 42 and two baffle structures 41. The blocking plate 3 is provided with a U-shaped slot 33 located between the two baffle structures 41, and one end of the elastic anti-slip rod 31 is connected to the closed end of the U-shaped slot 33, and the other end thereof extends to the open end of the U-shaped slot 33. When the blocking plate 3 is inserted into the slot structure 2, the elastic anti-slip rod 31 will be driven to slide and contact the bottom surface of the slot structure 2, so that the elastic anti-slip rod 31 is in a compressed and deformed state. Therefore, when the blocking plate 3 is pulled out of the slot structure 2, the elastic anti-slip rod 31 will use its own elastic deformation force to drive the anti-retraction buckle 32 to be stuck in the anti-retraction slot 21, thereby preventing the blocking plate from being separated from the slot structure.

[0045] Combination Figure 2 and Figure 5 As shown, the slot structure 2 is provided with two guide slots 22 extending along the insertion direction of the blocking plate 3, and the blocking plate 3 is correspondingly provided with two guide sliding edges 34 slidably connected to the guide slots 22. The two guide slots 22 are arranged on both sides of the bottom surface of the slot structure 2. This structural arrangement, through the cooperation of the guide slots 22 and the guide sliding edges 34, plays a sliding guiding role for the blocking plate 3 in the slot structure 2, thereby ensuring the stability and accuracy of the sliding of the blocking plate 3.

[0046] The outer end of the blocking plate 3 is an arc end 35 extending outside the slot structure 2. The operator can hold the blocking plate 3 at the arc end position by hand to push and pull the blocking plate 3. The operation force is convenient. In order to prevent the blocking plate 3 from being opened by human operation, Figure 1-2The two ends of the shell 1 are respectively provided with a padlock part 6 which is opposite to the arc end 35 in upper and lower directions. The padlock part 6 and the arc end 35 are respectively provided with a locking hole 7 corresponding to each other. The locking hole 7 can be used to insert a lead lock or other padlock. This structural design realizes the lead lock fixation of the blocking plate 3 in the closed state by connecting the lead lock in the locking hole 7 between the padlock part 6 and the arc end 35. In this way, the blocking plate 3 cannot be pulled out at will, and any direct operation cannot be performed on the wiring terminal 9 of the switch electrical appliance, further strengthening the protection of the wiring terminal 9, thereby avoiding the occurrence of misoperation or electric shock caused by informal operation, having good safety precautions, improving the safety of outdoor use, and facilitating the effective management of power operation, and having good practicality.

[0047] The switch device provided in this embodiment also includes a plurality of circuit boards 8 distributed in the housing 1 in a stacked structure, and the plurality of circuit boards 8 and the housing 1 are kept in a fixed relative position by a connection structure. It is further preferably arranged that, in combination with Figure 6-8 As shown, the shell 1 includes a base 13 and a shell cover 14 connected by a snap buckle, the blocking plate 3 is inserted in the slot structure 2 formed by the cover shell, the shell 1 includes a base 13 and a shell cover 14, the connection structure includes a plurality of groups of mounting slots 16 distributed on the side walls of the base 13 at intervals along the height direction of the base 13, and a plurality of groups of mounting blocks 81 respectively arranged on the side edges of the plurality of circuit boards 8 and plugged with the plurality of groups of mounting slots 16. When the shell cover 14 is installed on the base 13, it presses against the circuit board 8 located at the top, and a guide rail groove and a guide rail buckle for connecting the guide rail are provided at the bottom of the base 13. With this structural setting, the circuit board 8 is squeezed into the base 13, and the installation block 81 is squeezed and inserted into the installation slot 16 to achieve the installation and fixation between the circuit board 8 and the base 13. In this way, multiple circuit boards 8 are installed one by one in the shell 1 in sequence, and finally the cover is installed on the base 13. The circuit board designed in this way avoids the use of traditional screw installation methods. The installation structure is simple, tool-free installation is achieved, and the installation parts are reduced. The installation and disassembly are very convenient, which is conducive to improving installation efficiency and reducing production costs. It should be understood that in the over-voltage, under-voltage, overcurrent and overload intelligent protection switch provided in this embodiment, the circuit board is provided with two in the shell, and is divided into a control board and a display board. Refer to Figure 6 and Figure 7 A detachable transparent cover 15 is provided on the top of the housing, through which a display screen on the display board can be observed, and the display screen can be selected as an LED display screen 101 or a liquid crystal display screen 102.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An over-voltage, under-voltage, over-current and overload intelligent protection switch, comprising a housing (1) and wiring chambers (11) arranged at both ends of the housing (1), and wiring terminals (9) accommodated in the wiring chambers, wherein the top side of the housing (1) is provided with an operating hole (12) opposite to the wiring terminal (9), characterized in that: The two ends of the housing are respectively provided with slot structures (2) connected between the wiring cavity (11) and the operating hole (12); a movable blocking plate (3) is inserted into the slot structure (2); the blocking plate (3) has a closed state for shielding the wiring terminal (9) and an open state for exposing the wiring terminal (9); the blocking plate (3) is provided with a locking portion (4) for locking the relative position with the slot structure (2) in the closed state; and an anti-slip structure for preventing the blocking plate (3) from slipping out of the slot structure (2) in the open state is provided between the blocking plate and the slot structure (2).

2. According to claim 1, an over-voltage, under-voltage, over-current and overload intelligent protection switch is characterized in that: The locking portion (4) comprises at least one buffering slot (42) arranged on the blocking plate (3), and a baffle structure (41) extending and formed in the at least one buffering slot (42) and elastically deformable under pressure, wherein the baffle structure (41) is pressed into contact with the inner wall of the slot structure (2) when the blocking plate (3) is inserted into the slot structure (2), and is connected to the lower end of the operating hole.

3. According to claim 2, an over-voltage, under-voltage, over-current and overload intelligent protection switch is characterized in that: The locking portion (4) comprises a positioning buckle (43) arranged on the baffle structure (41); when the baffle structure (41) is connected to the lower end of the operating hole (12), the positioning buckle (43) is driven to cooperate and snap against the operating hole (12).

4. According to claim 1, an over-voltage, under-voltage, over-current and overload intelligent protection switch is characterized in that: The locking portion (4) comprises two elastic clamping arms arranged on the side edges of both sides of the blocking plate (3), and the side walls on both sides of the slot structure (2) are correspondingly provided with a clamping platform structure that forms a limiting fit with the two elastic clamping arms.

5. According to claim 1, the intelligent protection switch for over-voltage, under-voltage, over-current and overload is characterized in that: The anti-slip structure comprises an elastic anti-slip rod (31) arranged on the inner end of the blocking plate (3), a back-stop buckle (32) arranged at the bottom of one end of the elastic anti-slip rod (31), and a back-stop groove (21) correspondingly arranged at the opening of the slot structure (2), wherein the back-stop groove is located on the movement path of the elastic anti-slip rod (31), and when the blocking plate (3) moves out of the slot structure, the elastic anti-slip rod (31) drives the back-stop buckle (32) to be stuck in the back-stop groove (21).

6. According to claim 5, an over-voltage, under-voltage, over-current and overload intelligent protection switch is characterized in that: Two operating holes (12) are respectively provided on the top sides of both ends of the shell (1); the blocking plate (3) is correspondingly provided with two baffle structures (41); the blocking plate (3) is provided with a U-shaped groove (33) located between the two baffle structures (41); one end of the elastic anti-slip rod (31) is connected to the closed end of the U-shaped groove (33), and the other end thereof extends to the open end of the U-shaped groove (33).

7. The over-voltage, under-voltage, over-current and overload intelligent protection switch according to claim 6, characterized in that: At least one guide slot (22) extending along the insertion direction of the blocking plate (3) is provided in the slot structure (2), and at least one guide sliding edge (34) slidably connected to the guide slot (22) is correspondingly provided on the blocking plate (3).

8. An over-voltage, under-voltage, over-current and overload intelligent protection switch according to any one of claims 5 to 7, characterized in that: The outer end of the blocking plate (3) is an arc end (35) extending out of the slot structure (2), and padlock parts (6) are respectively provided at both ends of the housing (1) and are opposite to the arc end (35) in upper and lower directions. The padlock part (6) and the arc end (35) are respectively provided with locking holes (7) corresponding to each other, and the locking holes can be used to insert a lead blockade.

9. The over-voltage, under-voltage, over-current and overload intelligent protection switch according to claim 1, characterized in that: It also comprises a plurality of circuit boards (8) distributed in a stacked structure within the housing (1); the plurality of circuit boards (8) and the housing (1) are kept in a fixed relative position via a connection structure.

10. The over-voltage, under-voltage, over-current and overload intelligent protection switch according to claim 9, characterized in that: The housing (1) comprises a base (13) and a shell cover (14); the connection structure comprises a plurality of groups of mounting slots (16) spaced apart on the side walls of the base (13) along the height direction of the base (13); and a plurality of groups of mounting blocks (81) respectively arranged on the side edges of the plurality of circuit boards (8) and plugged into the plurality of groups of mounting slots (16); when the shell cover (14) is mounted on the base (13), it presses against the circuit board (8) located at the top.

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