A circuit breaker having dual magnetic fields

Abstract

A circuit breaker with double magnetic field. Mainly solve the current circuit breaker only at the static contact sets up the magnet, the magnetic field cannot completely cover the arc channel, the use effect general problem. Its characterized in that: first magnet (61) is located in the shell, and is installed together with the static contact;Second magnet (62) is located in the shell, and is installed below the arc guide plate. The utility model provides a kind of circuit breaker with double magnetic field, with two magnetic fields, can greatly increase the coverage area of magnetic field.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a circuit breaker with dual magnetic fields. Background Technology

[0002] As shown in Chinese Patent No. CN 207303015 U, a circuit breaker with a magnet-guided arc is disclosed, but the magnet is only placed at the stationary contact, and the magnetic field cannot completely cover the arc-running channel, so the effect is generally poor. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a circuit breaker with dual magnetic fields, which mainly solves the problem that current circuit breakers only have magnets at the stationary contact, and the magnetic field cannot completely cover the arcing channel, resulting in mediocre performance.

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

[0005] A circuit breaker with dual magnetic fields includes a housing, within which is an arc-extinguishing chamber, an arc-guiding plate for guiding an electric arc into the arc-extinguishing chamber, and opposing moving and stationary contacts.

[0006] A first magnet is disposed inside the housing and is mounted together with the stationary contact;

[0007] The second magnet is located inside the housing and is installed below the arc-starting plate.

[0008] The stationary contact includes an arc guide plate, and a clamping groove is formed inside the arc guide plate, and the first magnet is installed in the clamping groove.

[0009] The first magnet has a cylindrical structure.

[0010] The housing is provided with a mounting post, which contacts the circumferential outer wall of the first magnet.

[0011] The first magnet is made of iron, cobalt, and nickel.

[0012] The housing is provided with a support wall, and a stop block is provided on the support wall. The bottom end face of the second magnet is in contact with the support wall, one side wall is in contact with the stop block, and the other side wall is in contact with the inner wall of the housing.

[0013] It also includes a magnetizing plate, which is mounted on the back of the arc-inducing plate.

[0014] A gap groove is provided between the second magnet and the magnetizing plate.

[0015] The top end face of the stop block is in contact with the magnetizing plate.

[0016] The beneficial effects of this utility model are: This utility model provides a circuit breaker with dual magnetic fields, which can greatly increase the coverage area of ​​the magnetic field. Attached Figure Description

[0017] Figure 1 This is a perspective view of one embodiment of the present invention.

[0018] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0019] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0020] Figure 4 This is a partial explosion diagram of one embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. A circuit breaker with dual magnetic fields includes a housing 1, within which is an arc-extinguishing chamber 2, an arc-initiating plate 3 for guiding the electric arc into the arc-extinguishing chamber, and opposing moving contacts 4 and stationary contacts 5. It also includes a first magnet 61 disposed within the housing and mounted together with the stationary contact; and a second magnet 62 disposed within the housing and correspondingly mounted below the arc-initiating plate. The Lorentz force of the magnetic field generated by the magnets guides the electric arc, making it easier for it to enter the arc-extinguishing chamber. The simultaneous use of two magnets further enhances the guidance of the arc. When the arc is generated, one end travels along the stationary contact, and the other end along the arc-initiating plate; thus, having magnets at both ends improves the overall performance.

[0022] In this embodiment, as shown in the figure, the stationary contact includes an arc guide plate 51, and a clamping groove 511 is formed inside the arc guide plate. The first magnet is installed in the clamping groove. Installation is relatively convenient.

[0023] In this embodiment, as shown in the figure, the first magnet has a cylindrical structure.

[0024] In this embodiment, as shown in the figure, a mounting post 11 is provided inside the housing, and the mounting post contacts the circumferential outer wall of the first magnet. This serves to limit movement in multiple directions. The mounting post itself also has rivet holes for the mounting connection of the upper and lower covers, which is existing technology.

[0025] In this embodiment, as shown in the figure, the first magnet is made of iron, cobalt, and nickel.

[0026] In this embodiment, as shown in the figure, a support wall 12 is provided inside the housing, and a stop block 121 is provided on the support wall. The bottom end face of the second magnet contacts the support wall, one side wall contacts the stop block, and the other side wall contacts the inner wall of the housing. Installation is relatively convenient; it can be placed directly on the housing.

[0027] In this embodiment, as shown in the figure, a magnetizing plate 7 is also included, which is installed on the back of the arc-initiating plate. It can be made of a material such as iron, can be magnetized by the second magnet, and its length is greater than that of the second magnet, allowing for better cooperation with the arc-initiating plate.

[0028] In this embodiment, as shown in the figure, a gap groove 71 is provided between the second magnet and the magnetizing plate. The two do not contact each other.

[0029] In this embodiment, as shown in the figure, the top end face of the stop block is in contact with the magnetizing plate.

[0030] 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.

[0031] 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.

[0032] 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. A circuit breaker with dual magnetic fields, comprising a housing (1), wherein an arc-extinguishing chamber (2), an arc-guiding plate (3) for guiding an electric arc into the arc-extinguishing chamber, and a moving contact (4) and a stationary contact (5) disposed opposite to each other, characterized in that: Also includes The first magnet (61) is disposed inside the housing and is installed together with the stationary contact; The second magnet (62) is disposed inside the housing and is installed below the arc-starting plate.

2. A circuit breaker with dual magnetic fields according to claim 1, characterized in that: The stationary contact includes an arc guide plate (51), and a clamping groove (511) is formed inside the arc guide plate, and the first magnet is installed in the clamping groove.

3. A circuit breaker with dual magnetic fields according to claim 1, characterized in that: The first magnet has a cylindrical structure.

4. A circuit breaker with dual magnetic fields according to any one of claims 1-3, characterized in that: The housing is provided with a mounting post (11), which is in contact with the circumferential outer wall of the first magnet.

5. A circuit breaker with dual magnetic fields according to claim 1, characterized in that: The housing is provided with a support wall (12) and a stop block (121) on the support wall. The bottom end face of the second magnet is in contact with the support wall, one side wall is in contact with the stop block, and the other side wall is in contact with the inner wall of the housing.

6. A circuit breaker with dual magnetic fields according to claim 5, characterized in that: It also includes a magnetizing plate (7), which is mounted on the back of the arc-inducing plate.

7. A circuit breaker with dual magnetic fields according to claim 6, characterized in that: A gap groove (71) is provided between the second magnet and the magnetizing plate.

8. A circuit breaker with dual magnetic fields according to claim 6, characterized in that: The top end face of the stop block is in contact with the magnetizing plate.

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