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Heavy current contact with two-step contact

A high-current, two-step technology, applied in circuits, electric switches, electrical components, etc., can solve problems affecting the life of electrical appliances, contact material ablation, contact material splashing and transfer, and achieve the effect of extending electrical life

Inactive Publication Date: 2005-11-30
陈欢
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to balance the arc resistance and electrical conductivity of the contacts, powder metallurgy is currently used to mix two types of materials together, such as silver-cadmium oxide, silver-nickel, silver-tungsten, silver-graphite, etc. The arc resistance of this material is worse than that of a single material, and it is also prone to contact material splashing and transfer during use, that is, contact material ablation, which affects the life of electrical appliances

Method used

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  • Heavy current contact with two-step contact

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Embodiment Construction

[0008] As shown in the figure, the moving contact piece 3 is composed of two elastic branches, and the arc-resistant contact 1 and the current-guiding contact 2 are respectively arranged on it, and the arc-resistant contact 1 and the current-conducting contact 2 are arranged on the corresponding position of the static contact piece 4. flow contact 2,

[0009] In the embodiment, a tungsten contact is used as the arc-resistant contact 1, a pure silver contact is used as the current-guiding contact 2, and the movable contact 3 is formed by superimposing two elastic phosphor copper sheets to form two branches. The arc-resistant contact 1 is fixed, the diversion contact 2 is fixed on the lower piece, and the static contact is fixed on the static contact piece 4 correspondingly. One end of the two phosphor bronze sheets in the movable contact piece 3 is fixedly connected together, and the other end can be elastically separated.

[0010] When the contacts are engaged, because the ga...

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PUM

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Abstract

This invention relates to large current contact probe with two steps, which is improved on the large current probe. The invention comprises dynamic and static probes separately fixed on the contact points of dynamic and static contact slices, wherein, the dynamic slice is composed of two elastic branches with anti-arc contact point and flow guiding contact point; the static contact slice is relative located with anti-arc contact point and flow guiding contact point. The gap between the contact points is less than the gap between one pair of anti-arc contact points.

Description

technical field [0001] The invention relates to an electric switch, especially an improvement on the structure of a large current electric contact. Background technique [0002] Existing switches, including various relays, contactors and other devices, adopt a pair of contacts to form a switch circuit. Because some electric shock materials are arc-resistant, such as tungsten contacts; some have good conductivity, such as silver contacts. In order to balance the arc resistance and electrical conductivity of the contacts, powder metallurgy is currently used to mix two types of materials together, such as silver-cadmium oxide, silver-nickel, silver-tungsten, silver-graphite, etc. The arc resistance of this material is worse than that of a single material, and it is also prone to splashing and transfer of contact materials during use, that is, ablation of contact materials, which affects the life of electrical appliances. Contents of the invention [0003] The purpose of the...

Claims

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Application Information

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IPC IPC(8): H01H9/38
Inventor 陈欢
Owner 陈欢