Patent ID: 8432246

Claim:
An electric circuit breaker apparatus used in a vehicle having an electric circuit including an electric device and a storage battery for supplying power to the electric device, the electric circuit breaker apparatus interrupting supply of the power from the storage battery to the electric device when a collision of the vehicle is detected, the apparatus comprising: a power supply path connecting the electric device and a positive terminal of the storage battery to each other; and a power supply circuit breaker arranged in the power supply path, wherein the power supply circuit breaker includes a low explosive type first actuator, the first actuator being actuated to drive the power supply circuit breaker when the collision is detected, and wherein, when the first actuator is actuated, the power supply circuit breaker interrupts the power supply path and grounds a portion of the power supply path closer to the electric device than the interrupted portion, wherein the first actuator has a movement member that moves when the first actuator is actuated, wherein the power supply circuit breaker performs interruption of the power supply path and grounding of the portion of the power supply path closer to the electric device based on movement of the movement member, wherein the power supply path is formed by a cable, wherein the movement member has a cutter formed at a distal portion, the cable being cut by the cutter when the movement member moves in a direction crossing the cable in response to actuation of the first actuator, and wherein a first portion of the cutter at one side of an extending direction of the cable is formed of a conductive material, and a second portion of the cutter at the other side of the extending direction of the cable is formed of an insulating material.