Patent ID: 6793510
Filing Date: 2004-09-21
Classification: H01R

Abstract:
A protecting device in which a protection plug for switching a power supply circuit is detachably mountable to a fixed member to connect a movable circuit in the protection plug and a fixed circuit of the fixed member and form a power supply circuit for supplying a power to a load, and the power supply circuit is broken by detaching the protection plug, wherein:an input contact portion, a temporal circuit contact portion and an output contact portion are provided between a terminal in the movable circuit of the protection plug and a terminal in the fixed circuit of the fixed member, the input contact portion and the output contact portion are closed to supply the power to the load and the temporal circuit contact portion is opened in a normal state where the protection plug is mounted to the fixed member, and the temporal circuit contact portion is closed and connected with the power supply circuit at a first stage during the detachment of the protection plug, and with the input contact portion and the output contact portions being closed at the first stage during the detachment of the protection plug, a first of the input contact portion and the output contact portions is opened at a second stage of the detachment of the protection plug, the temporal circuit contact portion is opened at a third stage of the detachment of the protection plug, and a second of the input contact portion and the output contact portions is opened at a fourth stage of the detachment of the protection plug.