Patent ID: 7474181

Claim:
An electromagnetic relay comprising: an electromagnetic driving block composed by a coil, an iron core, a yoke, and an armature; first, second, and third terminals fixed to a base; fixed contacts provided at positions that generally form a triangle on an upper surface of the base; movable contacts provided at positions corresponding to the respective fixed contacts on a movable plate exhibiting a spring property; a first rib provided outside of the movable contacts at the positions corresponding to two of the three fixed contacts on the movable plate so as to be parallel to a line that connects the two fixed contacts; a second rib provided at a position outside of the movable contact corresponding to the other fixed contact on the movable plate so as to be parallel to the first rib; and spring portions provided on the line so as to support both ends of the movable plate by the base, wherein the armature drives the movable plate at its intermediate position depending on whether or not a current is carried to the coil, thereby opening or closing a contact circuit, whereby the spring property of the movable plate generates inward flexions and a wipe operation between said fixed contacts and said movable contacts.