Arc cutting structure of circuit breaker

Abstract

Provided is an arc cutting structure of a circuit breaker. The circuit breaker mainly solves the problem that an arc cutting structure of an existing circuit breaker is arranged on an arc isolating sheet and may fail. The circuit breaker is characterized by further comprising a convex rib (5) which is arranged on the inner wall of the shell, and at least the convex rib is arranged between the moving contact and the static contact during opening. According to the arc cutting structure of the circuit breaker provided by the utility model, the cutting structure is arranged on the inner wall of the shell, and the flash barrier only keeps the gas production effect, so that the failure is prevented.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to the arc cutting structure of circuit breakers. Background Technology

[0002] As shown in the Chinese patent CN211320039U, existing miniature circuit breakers have an arc-cutting structure on the arc-blocking plate. When the circuit breaker breaks the arc, it generates a lot of heat. The arc-blocking plate itself is very thin and not strong enough. It is easy to deform at high temperatures. When the moving contact moves, it may touch the arc-blocking plate and stick together, thus causing the product to not be energized. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides an arc cutting structure for circuit breakers, which mainly solves the problem that the current arc cutting structure of circuit breakers is set on the arc isolation plate and may fail.

[0004] The technical solution of this utility model is as follows:

[0005] The arc-cutting structure of a circuit breaker includes a housing, within which a moving contact, a stationary contact, and at least two arc-blocking plates are disposed, with an exhaust channel formed between the two arc-blocking plates.

[0006] A raised rib is provided on the inner wall of the housing, and at least the raised rib is provided between the moving contact and the stationary contact when the circuit is opened.

[0007] The rib is integrally formed with the shell.

[0008] The surface of the arc-blocking plate is a smooth plane.

[0009] The rib includes a first rib extending laterally, which is positioned above the stationary contact.

[0010] The rib includes a longitudinally extending second rib, which is located between the moving contact and the stationary contact when the circuit is open.

[0011] One end of the second rib is connected to the first rib.

[0012] One end of the second rib faces the exhaust channel.

[0013] The inner wall of the housing is provided with a groove, and the arc-blocking plate is disposed in the groove.

[0014] The settling tank is provided with a boss, and the arc-blocking plate is provided with mounting holes that mate with the boss.

[0015] The beneficial effects of this utility model are: This utility model provides an arc cutting structure for a circuit breaker, which is located on the inner wall of the housing, and the arc-blocking plate is only retained to generate gas to prevent failure. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0017] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0018] Figure 3 This is a partial perspective view of one embodiment of the present invention. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings. The arc cutting structure of the circuit breaker includes a housing 1, within which a moving contact 3, a stationary contact 4, and at least two arc-blocking plates 2 are provided. An exhaust channel 21 is formed between the two arc-blocking plates. It also includes a rib 5, disposed on the inner wall of the housing, and at least one of the ribs is located between the moving contact and the stationary contact during opening. The arc-blocking plates are only planar in shape and do not have cutting protrusions, retaining their gas-generating function. The arc is cut by the ribs added to the housing, preventing the arc-blocking plates from sticking to the moving contact due to rib deformation during breaking, thus avoiding the phenomenon of the product not being energized. The arc-blocking plates themselves are made of gas-generating material, which is existing technology and will not be described in detail. The "located between the moving contact and the stationary contact" does not mean it is located on the movement trajectory of the moving contact; it can be located on one side of its movement trajectory (e.g., the lower side), without affecting the movement of the moving contact. When the circuit breaker breaks, the arc can travel to the ribs for cutting.

[0020] In this embodiment, as shown in the figure, the protruding rib is integrally formed with the shell. Specifically, it can be integrally processed by methods such as injection molding.

[0021] In this embodiment, as shown in the figure, the surface of the arc-blocking plate is a smooth plane.

[0022] In this embodiment, as shown in the figure, the raised rib includes a first raised rib 51 extending laterally, which is positioned above the stationary contact. This enhances the arc-cutting effect. The lateral extension mentioned here refers to a general lateral direction and does not require parallelism to a horizontal line.

[0023] In this embodiment, as shown in the figure, the raised rib includes a longitudinally extending second raised rib 52, which is disposed between the moving contact and the stationary contact during circuit breaker opening. This further enhances the arc-cutting effect.

[0024] In this embodiment, as shown in the figure, one end of the second rib is connected to the first rib. This increases strength.

[0025] In this embodiment, as shown in the figure, one end of the second convex rib faces the exhaust channel. This is more conducive to arc guiding.

[0026] In this embodiment, as shown in the figure, the inner wall of the housing is provided with a recessed groove 11, and the arc-blocking plate is disposed in the recessed groove. Disposing of the arc-blocking plate in the recessed groove can reduce the impact of the electric arc on the arc-blocking plate.

[0027] In this embodiment, as shown in the figure, a boss 111 is provided in the sink groove, and mounting holes 25 that mate with the boss are provided on the arc-blocking plate. The arc-blocking plate can be fixed by means of snap-fit ​​or other methods, making assembly and disassembly relatively simple.

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An arc-cutting structure for a circuit breaker, comprising a housing (1), wherein a moving contact (3), a stationary contact (4), and at least two arc-blocking plates (2) are provided within the housing, and an exhaust channel (21) is formed between the two arc-blocking plates, characterized in that: Also includes A raised rib (5) is provided on the inner wall of the housing, and at least the raised rib is provided between the moving contact and the stationary contact when the circuit is opened.

2. The arc cutting structure of the circuit breaker according to claim 1, characterized in that: The rib is integrally formed with the shell.

3. The arc cutting structure of the circuit breaker according to claim 1, characterized in that: The surface of the arc-blocking plate is a smooth plane.

4. The arc cutting structure of the circuit breaker according to claim 1, characterized in that: The rib includes a first rib (51) extending laterally, which is positioned above the stationary contact.

5. The arc cutting structure of the circuit breaker according to claim 4, characterized in that: The rib includes a longitudinally extending second rib (52), which is located between the moving contact and the stationary contact when the circuit is open.

6. The arc cutting structure of the circuit breaker according to claim 5, characterized in that: One end of the second rib is connected to the first rib.

7. The arc cutting structure of the circuit breaker according to claim 6, characterized in that: One end of the second rib faces the exhaust channel.

8. The arc cutting structure of the circuit breaker according to any one of claims 1-7, characterized in that: The inner wall of the shell is provided with a groove (11), and the arc-blocking plate is provided in the groove.

9. The arc cutting structure of the circuit breaker according to claim 8, characterized in that: The sinkhole is provided with a boss (111), and the arc-blocking plate is provided with mounting holes (25) that cooperate with the boss.

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