JPH0160439U

JPH0160439U -

Info

Publication number: JPH0160439U
Application number: JP15571687U
Authority: JP
Priority date: 1987-10-12
Filing date: 1987-10-12
Publication date: 1989-04-17

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による消弧装置の
一部破断斜視図、第２図は第１図の平面図、第３
図はこの実施例の消弧板の斜視図、第４図は絶縁
板の斜視図、第５図はこの考案の他の実施例によ
る消弧装置の平面図、第６図は従来の消弧装置を
備えた回路しや断器の部分断面側面図、第７図は
第６図に示された消弧装置の平面図、第８図およ
び第９図はそれぞれ従来提案された消弧装置の平
面図である。図において、２，３は開閉接触子、４は消弧装
置、４０１は消弧板、４０３は消弧板４０１の両
脚部、１１，１１Ａは絶縁板である。なお、各図
中同一符号は同一部または相当部を示す。 FIG. 1 is a partially cutaway perspective view of an arc extinguishing device according to an embodiment of this invention, FIG. 2 is a plan view of FIG. 1, and FIG.
4 is a perspective view of an insulating plate, FIG. 5 is a plan view of an arc extinguishing device according to another embodiment of this invention, and FIG. 6 is a conventional arc extinguishing device. FIG. 7 is a plan view of the arc extinguishing device shown in FIG. 6, and FIGS. 8 and 9 are views of conventionally proposed arc extinguishing devices. FIG. In the figure, 2 and 3 are opening/closing contacts, 4 is an arc extinguishing device, 401 is an arc extinguishing plate, 403 is both legs of the arc extinguishing plate 401, and 11 and 11A are insulating plates. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims

[Claims for Utility Model Registration] (1) An arc extinguishing device for a circuit breaker, which is disposed facing a pair of switching contacts and extinguishes the arc that occurs between the switching contacts when the current is interrupted. The arc extinguishing plate is made up of a plurality of approximately U-shaped arc extinguishing plates that are open to the opening/closing contact side and are held in a stacked relationship at intervals, the thickness being increased at the inlet portion of the arc extinguishing device. An arc extinguishing device for a circuit or breaker, characterized in that an insulating plate made of a resin material that becomes smaller toward the back is provided inside at least one of the legs of the arc extinguishing plate. (2) The arc extinguishing device for a circuit or breaker according to claim 1, wherein the thickness of the insulating plate decreases linearly from the inlet of the arc extinguishing device toward the back. (3) The arc extinguishing device for a circuit or breaker as set forth in claim 1 of the utility model registration claim, characterized in that the thickness of the insulating plate is gradually reduced from the inlet portion of the arc extinguishing device toward the back. .