Miniature circuit breaker with arc striking chamber

Abstract

The utility model belongs to the field of circuit breakers, and particularly relates to a miniature circuit breaker with an arc striking chamber, which comprises a circuit breaker body and a mounting seat, the arc striking chamber is arranged in the circuit breaker body, a connecting block is fixedly connected outside the circuit breaker body, one end of the connecting block is fixedly connected with a connecting plate, and the other end of the connecting plate is fixedly connected with a connecting rod. A circular cavity is formed in the mounting seat, and a rectangular groove is formed in the outer surface of the mounting seat; through the structural design of the mounting base, the circular cavity and the rectangular groove, in the mounting process, a user only needs to simply insert the connecting plate into the rectangular groove, quick fixing can be achieved by extruding and rotating the circuit breaker body, complex threaded rod rotating operation is not needed, and the circuit breaker is particularly suitable for the mounting environment where the space is limited and close fit with other components is needed; according to the circuit breaker body fixing device, the installation efficiency and convenience are remarkably improved, meanwhile, the overall structure of the circuit breaker body fixing device is simplified, use of precise transmission parts is reduced, and therefore the manufacturing cost and the later maintenance cost are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a small circuit breaker with an arc guiding chamber. Background Art

[0002] A small circuit breaker, also known as a miniature circuit breaker, is one of the low-voltage components with the largest output and the widest range of applications in terminal electrical appliances. A small circuit breaker usually has a moving contact and a static contact. Under normal conditions, the moving and static contacts are in contact with each other, and the circuit is conducting. The lines and electrical equipment connected to the small circuit breaker work normally. When the lines and electrical equipment are overloaded or short-circuited, a large current will be generated in the circuit, causing the moving contact and the static contact to separate, thereby breaking the circuit and ensuring electrical safety. The Chinese authorized utility model patent (Publication No.: CN218887091U) discloses a small circuit breaker, which has a fixing rod arranged at the rear end of the circuit breaker body, and a locking mechanism is arranged in the fixing plate. By rotating the bidirectional threaded rod, the bidirectional threaded

[0003] rod can drive the insertion rods on the upper and lower sides to move up and down, so that the insertion rods are inserted into the installation grooves on the surface of the fixing rod for fixation. In this way, it is not necessary to cover the upper and lower ends of the circuit breaker body, and the connection of the wire will not be delayed.

[0004] The above device still has some deficiencies in actual use: the precision requirements for the bidirectional threaded rod and its supporting transmission components are relatively high, and the manufacturing and maintenance costs are relatively high. At the same time, after long-term operation, the bidirectional threaded rod is easily worn, resulting in a decrease in precision and affecting the fixing effect of the circuit breaker. At the same time, since the circuit breaker usually needs to be closely installed with other electrical equipment, the operating space of the bidirectional threaded rod is limited. Especially when it needs to be installed close to other components, it becomes particularly difficult to rotate the threaded rod, which not only increases the installation difficulty but also reduces the work efficiency. Therefore, in view of the above situation, a small circuit breaker with an arc guiding chamber is proposed. Summary of the Utility Model

[0005] In order to make up for the problem that it becomes difficult to rotate the threaded rod and increases the installation difficulty when it needs to be installed close to other components in the prior art, the utility model proposes a small circuit breaker with an arc guiding chamber.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a small circuit breaker with an arc guiding chamber, including a circuit breaker body and a mounting seat. The interior of the circuit breaker body has an arc guiding chamber. A connecting block is fixedly connected to the outside of the circuit breaker body, and one end of the connecting block is fixedly connected to a connecting plate.

[0007] A circular cavity is formed inside the mounting base. A rectangular groove is formed on the outer surface of the mounting base. The rectangular groove communicates with the circular cavity. A pair of limiting grooves are formed on the inner wall of the circular cavity. An elastic member is fixedly connected to the inner wall of the circular cavity. A circular plate is fixedly connected to the elastic member. After the connecting plate penetrates into the rectangular groove and rotates 90°, it cooperates with the limiting groove.

[0008] Preferably, the mounting base is rectangular in shape, and positioning holes are formed through the outer surface of the mounting base.

[0009] Preferably, the size of the rectangular groove is the same as that of the connecting plate.

[0010] Preferably, the number of the elastic members is several, and the several elastic members are arranged in a circular array on the inner wall of the circular cavity.

[0011] Preferably, the elastic member is an insulating spring.

[0012] Preferably, the maximum distance between the pair of limiting grooves is equal to the maximum distance between the two sides of the inner wall of the rectangular groove.

[0013] Preferably, there is a gap between the connecting plate and the outside of the circuit breaker body, and the outer surface of the circuit breaker body contacts the outer surface of the mounting base.

[0014] Preferably, the arc ignition chamber is composed of a plurality of arc ignition grooves.

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

[0016] 1. Through the structural design of the mounting base, the circular cavity and the rectangular groove, during the installation process, the user only needs to simply insert the connecting plate into the rectangular groove and rotate the circuit breaker body by extrusion to achieve quick fixation, without the need for complex operations of rotating the threaded rod. It is especially suitable for installation environments with limited space and requires close cooperation with other components, significantly improving the installation efficiency and convenience. At the same time, it also simplifies the overall structure of the fixing device of the circuit breaker body, reduces the use of precision transmission components, thereby effectively reducing the manufacturing cost and the later maintenance cost;

[0017] 2. Through the structural design of the limiting groove, after the circuit breaker body is installed, the limiting groove can be snapped into the limiting groove. Through the cooperation of the limiting groove and the connecting plate, the fixing effect of the circuit breaker body is further improved, preventing the situation of deviation caused by accidental collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic internal structure diagram of the circuit breaker body;

[0020] Figure 2 It is a schematic installation structure diagram of the circuit breaker body;

[0021] Figure 3 It is a schematic assembly structure diagram of the circuit breaker body;

[0022] Figure 4 It is a schematic cross-sectional structure diagram of the mounting base;

[0023] Figure 5 It is a schematic connection structure diagram of the circular plate and the elastic member.

[0024] In the figure: 1. Circuit breaker body; 101. Arc ignition chamber; 102. Connecting block; 103. Connecting plate; 2. Mounting base; 201. Circular cavity; 202. Rectangular groove; 203. Limiting groove; 204. Positioning hole; 3. Elastic member; 4. Circular plate. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] The following is a further detailed description of the present application Figures 1-5

[0027] The embodiments of the present application disclose a miniature circuit breaker with an arc ignition chamber. Referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , a miniature circuit breaker with an arc ignition chamber includes a circuit breaker body 1 and a mounting base 2. The interior of the circuit breaker body 1 has an arc ignition chamber 101, the arc ignition chamber 101 is composed of a plurality of arc ignition grooves, the outside of the circuit breaker body 1 is fixedly connected with a connecting block 102, and one end of the connecting block 102 is fixedly connected with a connecting plate 103. ​

[0028] Furthermore, by providing an arc striking chamber 101 inside the circuit breaker body 1, the arc striking effect is improved, so that the generated arc can be quickly dispersed and extinguished, thereby improving the performance and safety of the circuit breaker body 1.

[0029] A circular cavity 201 is provided inside the mounting seat 2, and a rectangular groove 202 is provided on the outer surface of the mounting seat 2. The rectangular groove 202 is connected to the circular cavity 201, and a pair of limiting grooves 203 are provided on the inner wall of the circular cavity 201. An elastic member 3 is fixedly connected to the inner wall of the circular cavity 201, and a circular plate 4 is fixedly connected to the elastic member 3. The connecting plate 103 is inserted into the rectangular groove 202 and rotated 90° to cooperate with the limiting groove 203.

[0030] Reference Figure 2 , Figure 3 and Figure 4 The mounting seat 2 is rectangular in shape, and a positioning hole 204 is formed through the outer surface of the mounting seat 2 .

[0031] In this embodiment, by providing the positioning holes 204 , when fixing the mounting base 2 , bolts can be passed through the corresponding positioning holes 204 and docked with the reserved holes on the connecting device to complete the fixed installation of the mounting base 2 .

[0032] Reference Figure 3 and Figure 4 , the size of the rectangular groove 202 is the same as the size of the connecting plate 103.

[0033] In this embodiment, the connecting plate 103 can be inserted into the circular cavity 201 laterally through the rectangular groove 202 .

[0034] Reference Figure 4 and Figure 5 The number of the elastic members 3 is several, and the several elastic members 3 are arranged on the inner wall of the circular cavity 201 in a circular array, and the elastic members 3 are insulating springs.

[0035] By providing the elastic member 3 , after the connecting plate 103 is inserted, the connecting plate 103 abuts against the extruding circular plate 4 , and the circular plate 4 extrudes the elastic member 3 , so that the connecting plate 103 enters the circular cavity 4 .

[0036] Reference Figure 3 The maximum distance between a pair of the limiting grooves 203 is equal to the maximum distance between the two sides of the inner wall of the rectangular groove 202.

[0037] In this embodiment, after the connection plate 103 is assembled, the connection plate 103 can be snapped into a pair of limiting grooves 203 to achieve limiting.

[0038] Reference Figure 1 , Figure 2 andFigure 3 The connecting plate 103 has a gap with the outside of the circuit breaker body 1, and the outer surface of the circuit breaker body 1 contacts the outer surface of the mounting base 2.

[0039] In this embodiment, after the connecting plate 103 is inserted, the connecting block 102 passes through the mounting base 2 through the rectangular groove 202, and the outer surface of the circuit breaker body 1 contacts the outer surface of the mounting base 2 to ensure the compactness and stability of the circuit breaker body 1 after installation.

[0040] Working principle: When in use, first fix the mounting base 2 on the relevant equipment by bolts, and then Figure 3 horizontally pick up the circuit breaker body 1 as shown, insert the elastic member 3 into the rectangular groove 202, and push the circuit breaker body 1 towards the inside of the rectangular groove 202. After the circuit breaker body 1 moves, the connecting plate 103 will squeeze the circular plate 4, and the circular plate 4 will squeeze 5, so that the connecting plate 103 enters the circular cavity 201. Then rotate the circuit breaker body 1 by 90°, slowly release the circuit breaker body 1 so that it no longer squeezes the circular plate 4. Under the reset of the elastic member 3, the connecting plate 103 moves towards one end of the limiting groove 203 and is clamped in the limiting groove 203 to cooperate with it.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A miniature circuit breaker with an arc striking chamber, characterized in that: include A circuit breaker body (1), wherein the circuit breaker body (1) has an arc striking chamber (101) inside, a connection block (102) is fixedly connected to the outside of the circuit breaker body (1), and one end of the connection block (102) is fixedly connected to a connection plate (103); A mounting seat (2), wherein a circular cavity (201) is provided inside the mounting seat (2), a rectangular groove (202) is provided on the outer surface of the mounting seat (2), the rectangular groove (202) is communicated with the circular cavity (201), a pair of limiting grooves (203) are provided on the inner wall of the circular cavity (201), an elastic member (3) is fixedly connected to the inner wall of the circular cavity (201), a circular plate (4) is fixedly connected to the elastic member (3), and the connecting plate (103) is inserted into the rectangular groove (202), rotated 90 degrees, and then matched with the limiting groove (203).

2. A miniature circuit breaker with an arc striking chamber according to claim 1, characterized in that: The mounting seat (2) is rectangular in shape, and a positioning hole (204) is provided through the outer surface of the mounting seat (2).

3. A miniature circuit breaker with an arc striking chamber according to claim 1, characterized in that: The size of the rectangular groove (202) is the same as the size of the connecting plate (103).

4. A miniature circuit breaker with an arc striking chamber according to claim 1, characterized in that: The elastic members (3) are in a plurality, and the plurality of elastic members (3) are arranged in a circular array on the inner wall of the circular cavity (201).

5. A miniature circuit breaker with an arc striking chamber according to claim 4, characterized in that: The elastic member (3) is an insulating spring.

6. A miniature circuit breaker with an arc striking chamber according to claim 1, characterized in that: The maximum distance between the pair of limiting grooves (203) is equal to the maximum distance between the two sides of the inner wall of the rectangular groove (202).

7. A miniature circuit breaker with an arc striking chamber according to claim 1, characterized in that: There is a gap between the connection plate (103) and the outside of the circuit breaker body (1), and the outer surface of the circuit breaker body (1) is in contact with the outer surface of the mounting seat (2).

8. A miniature circuit breaker with an arc striking chamber according to claim 1, characterized in that: The arc striking chamber (101) is composed of a plurality of arc striking grooves.

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