Arc extinguishing structure of miniature circuit breaker

A small circuit breaker and arc extinguishing technology, applied in circuit breaker parts, circuits, electrical components, etc., can solve the problems of arc extinguishing effect, reduce airflow stability, etc., achieve fast and convenient assembly, improve reliability, and ensure uniform effect

Pending Publication Date: 2021-12-14
浙江天正智能电器有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the relative position of the two arc baffles will change, reduce the stability of the air flow, and cause the arc extinguishing effect to be one plate, thereby providing a reliable arc extinguishing Arc extinguishing structure of high miniature circuit breaker

Method used

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  • Arc extinguishing structure of miniature circuit breaker
  • Arc extinguishing structure of miniature circuit breaker
  • Arc extinguishing structure of miniature circuit breaker

Examples

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Effect test

Embodiment

[0037] This embodiment provides a miniature circuit breaker, such as figure 1 and 2 As shown, it includes a housing 1 , and a conductive member 14 , an arc striker 4 , an arc shield 3 , a magnetic guide plate 10 and an arc extinguishing chamber 5 arranged on the housing 1 .

[0038] The conductive member 14 is located between the two arc shields 3, such as figure 2 and 4 As shown, it has an integrally bent static contact 2 and an arc-leading pin 8 connected to form, the static contact 2 is provided with a static contact 15, and the arc-leading pin 8 is from the static contact 2 to the arc extinguishing chamber 5 direction extension.

[0039] The arc striker 4 is arranged between the two arc dividers 3 , and a position limiting structure is provided between the arc striker 4 and the arc divider 3 to limit the position of the arc divider 3 . In this example, if image 3 and 8 As shown, the arc starting piece 4 is an arc starting piece 9 arranged on the lower side of the o...

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PUM

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Abstract

The invention provides an arc extinguishing structure of a miniature circuit breaker. The arc extinguishing structure comprises a shell, and a static contact, two flash barriers, an arc striking piece and an arc extinguishing chamber which are arranged in the shell, wherein the two flash barriers are respectively arranged at two sides of the static contact, the arc striking piece is suitable for guiding an electric arc to the arc extinguishing chamber, and a limiting structure suitable for limiting the positions of the flash barriers is arranged between the arc striking piece and the flash barriers. Therefore, the relative positions of the two flash barriers are limited, so that the distance between the two flash barriers is kept at the preset optimal distance, the stability of airflow is improved, and the reliability of arc extinguishing is improved.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to an arc extinguishing structure of a small circuit breaker. Background technique [0002] Miniature circuit breakers refer to protective appliances installed on terminal distribution lines, mainly used for overload and short-circuit protection of lines and electrical equipment. [0003] The contact mechanism of the miniature circuit breaker will generate an arc when it is broken. Make it burn out on the magnetic plate, and an arc shield is also arranged between the magnetic conductive plate and the static contact. In actual use, the inventor found that due to the shaking of the product during handling, transportation and installation, the relative positions of the two arc barriers on both sides of the static contact will change, that is, the distance between the two arc barriers The spacing will deviate from the preset optimal spacing, which will reduce...

Claims

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Application Information

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IPC IPC(8): H01H73/18H01H9/34H01H9/44
CPCH01H73/18H01H9/34H01H9/44
Inventor 史克少黄佳任昌宾张红伟卢权胜
Owner 浙江天正智能电器有限公司
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