Patent ID: 9704681
Date: 2017-07-11
CPC Classifications: H01H

Claim:
1. A conduction breaking device configured to break conduction between a pair of devices in an electric circuit, the conduction breaking device comprising: a conductive body arranged between the devices, wherein the conductive body includes an elongated plate-shaped cuttable portion; a fixed blade and an arc-extinguishing chamber, which are located on one side of the cuttable portion with respect to a thickness direction of the cuttable portion and are arranged to be adjacent to each other; a gas generator, which is located on the opposite side of the cuttable portion from the fixed blade and the arc-extinguishing chamber with respect to the thickness direction, wherein the gas generator generates gas toward the arc-extinguishing chamber; and a cutting member, which is arranged between the cuttable portion and the gas generator and receives a pressure of the gas toward the arc-extinguishing chamber, wherein the cutting member includes a movable blade, which moves in a section that is close to the fixed blade in a longitudinal direction of the cuttable portion and cooperates with the fixed blade to cut the cuttable portion, wherein when the cuttable portion is cut, a pair of cut edges separated from each other is formed in the cuttable portion so that conduction between the devices is broken, each cut edge includes a cut end, which corresponds to a part of the cut edge that is cut at the end, an arc generated between the cut ends of the cut edges is attenuated in the arc-extinguishing chamber, the cuttable portion includes two side edges extending in the longitudinal direction, and the conduction breaking device further comprises at least one cutting delaying portion configured to cut a part of the cuttable portion between the two side edges of the cuttable portion after cutting the side edges of the cuttable portion.