Patent ID: 8716615

Claim:
A conduction breaking device comprising: a case having a side wall; an accommodation chamber formed in the case; a movable member that is accommodated in the accommodation chamber to be movable in a moving direction; a cutter portion provided on the movable member, wherein the cutter portion projects from a leading side of the movable member; a gas generator that is arranged in the accommodation chamber and on the trailing side of the movable member, wherein the gas generator generates gas in response to input of an activation signal; and a conduction member having a pair of external connection portions, the conduction member extending to connect the external connection portions to each other, wherein the conduction member includes: a pair of base portions provided in the side wall of the case, the base portions extending in the moving direction of the movable member and being connected to the pair of external connection portions, respectively; and a breakable portion that connects the base portions to each other and extends in the accommodation chamber to interfere with the advancing side of the movable member, wherein the conduction breaking device further includes: at least one step portion that is formed into a stepped shape in the breakable portion; and at least one engaging portion provided in the case, wherein the engaging portion shaped to engage with the at least one step portion.