Molded case residual current circuit breaker

Abstract

The utility model relates to the technical field of plastic shell residual-current circuit breakers, in particular to a plastic shell residual-current circuit breaker, which comprises a plastic shell residual-current circuit breaker main body, four limiting plates are respectively clamped on the front side of the plastic shell residual-current circuit breaker main body, and a plastic shell cover is fixedly arranged on the front sides of the four limiting plates together. According to the utility model, the plastic shell cover of the plastic shell residual-current circuit breaker can be clamped and fixed together by using the limiting plate, the sliding rod, the embedded block and the fixing plate, and the plastic shell cover can be stably installed without using a screw installation mode; meanwhile, the situation that the plastic shell cover cannot be fixed due to screw slipping can be avoided, the plastic shell electric leakage circuit breaker is clamped and fixed through the elastic buckle, the positioning block and the pressing plate, the plastic shell electric leakage circuit breaker can be fixed to the mounting plate, and then assembling and disassembling time can be saved through clamping of the plastic shell cover and clamping of the plastic shell electric leakage circuit breaker; therefore, the molded case residual-current circuit breaker is convenient to overhaul.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic case leakage circuit breakers, and specifically relates to a plastic case leakage circuit breaker. Background Technique

[0002] A plastic case leakage circuit breaker, also known as a plastic shell circuit breaker, is mainly used for overload, short-circuit and undervoltage protection of equipment. This circuit breaker can not only be used for infrequent conversion of circuits and infrequent starting of motors under normal circumstances, but also be used to distribute electric energy in a distribution network to protect the circuit and power supply equipment from overload, short-circuit and undervoltage damage.

[0003] In the prior art, the patent application number "CN202223610537.9" is disclosed, which is a plastic case leakage circuit breaker, including a circuit breaker housing. A concave cavity is provided on the surface of the circuit breaker housing, and an upper cover for pressing and fixing a circuit board in the concave cavity is provided on the upper surface of the circuit breaker housing. By adding an upper cover to the original circuit breaker and simultaneously providing a concave cavity for installing the circuit board on the surface of the circuit breaker, the circuit board can be installed in the concave cavity outside the circuit breaker housing, isolating the circuit board from the inside of the circuit breaker, and preventing the electric arc caused by the failure of the electronic components on the circuit board from spraying onto the main circuit of the leakage circuit breaker and causing a failure.

[0004] This plastic case leakage circuit breaker can only isolate the circuit board from the inside of the circuit breaker. In actual use, such as the above-mentioned plastic case leakage circuit breaker, screws are used to assemble and fix the plastic case cover. Such a fixing method is prone to the phenomenon of slipping threads, making the plastic case cover unable to be firmly installed, thus affecting the safety of the plastic case leakage circuit breaker during use. At the same time, it is not convenient to disassemble the plastic case leakage circuit breaker to repair and replace the internal electrical components, and it is not easy to use. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a plastic case leakage circuit breaker to solve the problems raised in the above background technique.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A plastic case leakage circuit breaker includes a plastic case leakage circuit breaker main body. Four limiting plates are respectively clamped on the front side of the plastic case leakage circuit breaker main body. A plastic case cover is fixedly installed together on the front side of the four limiting plates. Two symmetrically arranged positioning clamping plates are connected to the rear side of the plastic case cover. Two symmetrically arranged support plates are installed inside the plastic case leakage circuit breaker main body;

[0008] On one side of each of the two support plates, there is a sliding connection with a sliding rod for fixing the plastic shell cover. Between the two sliding rods and the support plates, there is a first spring connected. One side of the sliding rod penetrates through the support plate and extends to the other side of the support plate. On one side of the two sliding rods, there is a connecting plate installed. Inside the plastic shell cover, there are fixed plates connected in an array. Inside the plastic shell leakage circuit breaker main body, there are elastic plates fixedly connected in an array distribution. On the front side of the elastic plate, there is an embedded block installed.

[0009] Preferably, a baffle is fixedly provided on the lower side of the plastic shell leakage circuit breaker main body. On the rear side of the baffle, there is a mounting plate fixedly connected. Inside the mounting plate, there are two parallel circular rods installed. On the outer surfaces of the two circular rods, there are two symmetrically arranged U-shaped sliding plates slidingly connected. On the inner sides of the two U-shaped sliding plates, there are two positioning blocks for fixing the plastic shell leakage circuit breaker main body connected. Between the two U-shaped sliding plates, there are two third springs fixedly connected.

[0010] Preferably, on the front side of the mounting plate, there are two symmetrically arranged elastic buckles installed. On the front side of the mounting plate, there is a cross plate fixedly connected. On the lower side of the cross plate, there are second springs connected in an array. On the lower side of the second springs, there is a pressing plate for fixing the plastic shell leakage circuit breaker main body installed. The pressing plate is located above the plastic shell leakage circuit breaker main body. On the lower side of the pressing plate, there is a rubber pad connected.

[0011] Preferably, on one side of each of the two positioning cards, there is a circular groove opened. The circular groove is adapted to the sliding rod. The inner side surface of the sliding rod is slidably clamped with one side of the positioning card through the circular groove.

[0012] Preferably, on the rear side of the fixed plate, there is a card slot opened. The card slot is adapted to the embedded block. The front side of the embedded block is clamped with the rear side of the fixed plate through the card slot.

[0013] Preferably, on both ends of the plastic shell leakage circuit breaker main body, there are two square grooves opened. The square grooves are adapted to the positioning blocks. The inner side surfaces of the positioning blocks are clamped with both ends of the plastic shell leakage circuit breaker main body through the square grooves.

[0014] Preferably, on both ends of the plastic shell leakage circuit breaker main body, there are grooves opened. The grooves are adapted to the elastic buckles. The inner side surfaces of the elastic buckles are clamped with both ends of the plastic shell leakage circuit breaker main body through the grooves.

[0015] The beneficial effects of the present utility model:

[0016] 1. By using the limiting plate, the sliding rod, and the embedded block and the fixed plate, the plastic shell cover of the plastic shell leakage circuit breaker can be clamped and fixed together. Without using the screw installation method, the plastic shell cover can be stably installed, ensuring the safety during the use of the plastic shell leakage circuit breaker. At the same time, it can also avoid the problem that the screw slips and cannot fix the plastic shell cover, saving costs;

[0017] 2. The utility model fixes the plastic shell leakage circuit breaker by means of elastic buckles, positioning blocks and pressing plates, so that the plastic shell leakage circuit breaker is fixed on the mounting plate, increasing the stability during the use of the plastic shell leakage circuit breaker. Subsequently, the clamping of the plastic shell cover and the clamping of the plastic shell leakage circuit breaker can both save the loading and unloading time, thereby making the plastic shell leakage circuit breaker convenient for loading, unloading and maintenance and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is the present utility model Figure 1 The installation schematic diagram of the plastic shell leakage circuit breaker main body, the limit plate and the plastic shell cover in the present utility model;

[0021] Figure 3 It is the present utility model Figure 2 The enlarged view of part A in the present utility model;

[0022] Figure 4 It is the present utility model Figure 1 The installation schematic diagram of the plastic shell cover and the mounting plate in the present utility model;

[0023] Figure 5 It is the present utility model Figure 4 The enlarged view of part B in the present utility model;

[0024] Figure 6 It is the present utility model Figure 1 The installation schematic diagram of the positioning block and the elastic buckle in the present utility model;

[0025] The reference signs in the drawings are as follows:

[0026] 1. Plastic shell leakage circuit breaker main body; 2. Limit plate; 3. Plastic shell cover; 4. Baffle; 5. Mounting plate; 6. Positioning card plate; 7. Support plate; 8. Slide bar; 9. First spring; 10. Connecting plate; 11. Elastic plate; 12. Embedded block; 13. Fixed plate; 14. Cross plate; 15. Elastic buckle; 16. Second spring; 17. Pressing plate; 18. Rubber pad; 19. Round rod; 20. U-shaped slide plate; 21. Third spring; 22. Positioning block; 31. Groove; 32. Square groove; 33. Round groove; 34. Card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figures 1 to 6 shown, a plastic case leakage circuit breaker includes a plastic case leakage circuit breaker main body 1. Four limit plates 2 are respectively clamped on the front side of the plastic case leakage circuit breaker main body 1. A plastic case cover 3 is fixedly installed together on the front sides of the four limit plates 2. The four limit plates 2 can be used to initially fix the plastic case cover 3 for assembling the plastic case leakage circuit breaker. Two symmetrically arranged positioning card plates 6 are connected to the rear side of the plastic case cover 3. Through the arrangement of the positioning card plates 6, the positioning card plates 6 can also play a limiting role to fix the plastic case cover 3. Two symmetrically arranged support plates 7 are installed inside the plastic case leakage circuit breaker main body 1;

[0029] A slide bar 8 for fixing the plastic case cover 3 is slidably connected to one side of each of the two support plates 7. A first spring 9 is connected between each of the two slide bars 8 and the support plate 7. One side of the slide bar 8 penetrates through the support plate 7 and extends to the other side of the support plate 7. A connecting plate 10 is installed on one side of each of the two slide bars 8. The connecting plate 10 can be used to drive the slide bar 8 to move to release the limit on the positioning card plate 6 so as to remove the plastic case cover 3. Fixing plates 13 are connected in an array inside the plastic case cover 3. Elastic plates 11 distributed in an array are fixedly connected inside the plastic case leakage circuit breaker main body 1. An embedded block 12 is installed on the front side of the elastic plate 11.

[0030] A baffle 4 is fixedly provided on the lower side of the plastic case leakage circuit breaker main body 1. An installation plate 5 is fixedly connected to the rear side of the baffle 4. Through the arrangement of the installation plate 5, the plastic case leakage circuit breaker can be fixed on a wall surface or a circuit board by using the installation plate 5 and bolts, which is convenient to use. Two parallel circular rods 19 are installed inside the installation plate 5. Two symmetrically arranged U-shaped sliding plates 20 are slidably connected to the outer surfaces of the two circular rods 19. Two positioning blocks 22 for fixing the plastic case leakage circuit breaker main body 1 are connected to the inner sides of the two U-shaped sliding plates 20. Two third springs 21 are fixedly connected between the two U-shaped sliding plates 20. Through the arrangement of the U-shaped sliding plates 20, the two U-shaped sliding plates 20 can be moved on the two circular rods 19 by the elastic force of the third springs 21 so as to clamp the left and right sides of the plastic case leakage circuit breaker, which is convenient to use. At the same time, as long as the clamping limit on the plastic case leakage circuit breaker is released, the plastic case leakage circuit breaker can be directly removed for quick maintenance of the plastic case leakage circuit breaker, with convenient operation and time saving.

[0031] On the front side of the mounting plate 5, two symmetrically arranged elastic buckles 15 are installed. A cross plate 14 is fixedly connected to the front side of the mounting plate 5. A number of second springs 16 are connected to the lower side of the cross plate 14 in an array. A pressing plate 17 for fixing the plastic case leakage circuit breaker main body 1 is installed on the lower side of the second springs 16. The pressing plate 17 is located above the plastic case leakage circuit breaker main body 1. A rubber pad 18 is connected to the lower side of the pressing plate 17. Through the arrangement of the rubber pad 18, the elastic force of the second springs 16 is utilized to enable the pressing plate 17 to elastically fix the plastic case leakage circuit breaker in the baffle 4. At the same time, the rubber pad 18 at the pressing plate 17 can increase the friction with the plastic case leakage circuit breaker, so as to more stably position the plastic case leakage circuit breaker.

[0032] On one side of each of the two positioning plates 6, a circular groove 33 is provided. The circular groove 33 is adapted to the sliding rod 8. The inner side surface of the sliding rod 8 is slidably clamped with one side of the positioning plate 6 through the circular groove 33.

[0033] On the rear side of the fixing plate 13, a clamping groove 34 is provided. The clamping groove 34 is adapted to the embedding block 12. The front side of the embedding block 12 is clamped with the rear side of the fixing plate 13 through the clamping groove 34.

[0034] On both ends of the plastic case leakage circuit breaker main body 1, two square grooves 32 are provided. The square grooves 32 are adapted to the positioning blocks 22. The inner side surfaces of the positioning blocks 22 are clamped with both ends of the plastic case leakage circuit breaker main body 1 through the square grooves 32.

[0035] On both ends of the plastic case leakage circuit breaker main body 1, grooves 31 are provided. The grooves 31 are adapted to the elastic buckles 15. The inner side surfaces of the elastic buckles 15 are clamped with both ends of the plastic case leakage circuit breaker main body 1 through the grooves 31.

[0036] The working principle of a plastic case leakage circuit breaker provided by the present utility model is as follows:

[0037] By first clamping the limiting plate 2 at the plastic case cover 3 to the front of the plastic case leakage circuit breaker main body 1, at this time, the embedding block 12 at the elastic plate 11 will also be embedded into the clamping groove 34 of the fixing plate 13 to further lock the plastic case cover 3. Then, with the clamping of the plastic case cover 3, the two sliding rods 8 installed with the first springs 9 will also be compressed. In this way, the elastic sliding rods 8 can automatically be clamped into the circular grooves 33 at the positioning plates 6. In this way, the plastic case cover 3 of the plastic case leakage circuit breaker can be clamped and fixed together by using the limiting plate 2, the sliding rods 8, the embedding block 12 and the fixing plate 13. It is possible to stably install the plastic case cover 3 without using the screw installation method, ensuring the safety during the use of the plastic case leakage circuit breaker. At the same time, it can also avoid the problem that the screws are stripped and the plastic case cover 3 cannot be fixed, saving costs;

[0038] By moving two U-shaped sliding plates 20 installed with the third spring 21 towards each other, and then placing the plastic case leakage circuit breaker main body 1 on the baffle 4 at the installation plate 5. First, two elastic buckles 15 will be snap-fitted into the grooves 31 at the plastic case leakage circuit breaker main body 1. Then, release the two U-shaped sliding plates 20 with elasticity to make the two U-shaped sliding plates 20 move towards each other. In this way, the positioning blocks 22 at the two U-shaped sliding plates 20 can be inserted into the square grooves 32 of the plastic case leakage circuit breaker for further snap-fitting and fixing the plastic case leakage circuit breaker. At the same time, the pressing plate 17 installed with the second spring 16 will also be pressed and fixed above the plastic case leakage circuit breaker to increase the stability during the use of the plastic case leakage circuit breaker. Then, by using the snap-fitting of the plastic case cover 3 and the snap-fitting of the plastic case leakage circuit breaker, the loading and unloading time can be saved, thereby making the plastic case leakage circuit breaker convenient for loading, unloading and maintenance, and improving the detection efficiency.

[0039] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A plastic case leakage circuit breaker, comprising a plastic case leakage circuit breaker body (1), characterized in that: Four limit plates (2) are respectively clamped on the front side of the plastic case leakage circuit breaker body (1). A plastic case cover (3) is fixedly installed together on the front sides of the four limit plates (2). Two symmetrically arranged positioning card plates (6) are connected to the rear side of the plastic case cover (3). Two symmetrically arranged support plates (7) are installed inside the plastic case leakage circuit breaker body (1); On one side of each of the two support plates (7), a sliding rod (8) for fixing the plastic case cover (3) is slidably connected. A first spring (9) is connected between each of the two sliding rods (8) and the support plate (7). One side of the sliding rod (8) penetrates through the support plate (7) and extends to the other side of the support plate (7). Connecting plates (10) are installed on one side of each of the two sliding rods (8). Fixing plates (13) are arrayedly connected inside the plastic case cover (3). Elastic plates (11) distributed in an array are fixedly connected inside the plastic case leakage circuit breaker body (1). Embedding blocks (12) are installed on the front side of the elastic plate (11).

2. A plastic case leakage circuit breaker according to claim 1, characterized in that, A baffle (4) is fixedly provided on the lower side of the plastic case leakage circuit breaker body (1). An installation plate (5) is fixedly connected to the rear side of the baffle (4). Two parallelly arranged round rods (19) are installed inside the installation plate (5). Two symmetrically arranged U-shaped sliding plates (20) are slidably connected to the outer surfaces of the two round rods (19). Two positioning blocks (22) for fixing the plastic case leakage circuit breaker body (1) are connected to the inner sides of the two U-shaped sliding plates (20). Two third springs (21) are fixedly connected between the two U-shaped sliding plates (20).

3. A molded case leakage circuit breaker according to claim 2, characterized in that, Two symmetrically arranged elastic buckles (15) are installed on the front side of the installation plate (5). A cross plate (14) is fixedly connected to the front side of the installation plate (5). Second springs (16) are arrayedly connected to the lower side of the cross plate (14). A pressing plate (17) for fixing the plastic case leakage circuit breaker body (1) is installed on the lower side of the second spring (16). The pressing plate (17) is located above the plastic case leakage circuit breaker body (1). A rubber pad (18) is connected to the lower side of the pressing plate (17).

4. A plastic case leakage circuit breaker according to claim 1, characterized in that, Round grooves (33) are formed on one side of each of the two positioning card plates (6). The round grooves (33) are adapted to the sliding rods (8). The inner side surface of the sliding rod (8) is slidably clamped with one side of the positioning card plate (6) through the round groove (33).

5. A plastic case leakage circuit breaker according to claim 1, characterized in that, A clamping groove (34) is formed on the rear side of the fixing plate (13). The clamping groove (34) is adapted to the embedding block (12). The front side of the embedding block (12) is clamped with the rear side of the fixing plate (13) through the clamping groove (34).

6. A plastic case leakage circuit breaker according to claim 1, characterized in that, Two square grooves (32) are formed at both ends of the plastic case leakage circuit breaker body (1). The square grooves (32) are adapted to the positioning blocks (22). The inner side surface of the positioning block (22) is clamped with both ends of the plastic case leakage circuit breaker body (1) through the square groove (32).

7. A plastic case leakage circuit breaker according to claim 3, characterized in that, Both ends of the plastic case leakage circuit breaker body (1) are provided with grooves (31), the grooves (31) are adapted to the elastic buckles (15), and the inner sides of the elastic buckles (15) are clamped with both ends of the plastic case leakage circuit breaker body (1) through the grooves (31).

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