Patent ID: 8143979

Claim:
An electromagnetic relay for starters comprising: a first terminal-bolt that is connected to a power supply side of an electric circuit; a second terminal-bolt connected to a load side of the electric circuit; a set of fixed contacts fixed on one end of each of the first and second terminal-bolts; a movable contact that faces and is movable to the set of fixed contacts; and a solenoid that drives a movable core by forming an electromagnet by energization; wherein, the movable contact that is synchronized with a movement of the movable core electrically intermits the set of fixed contacts, the first and second terminal-bolts and the set of fixed contacts are formed with different kinds of metals, a plurality of concavo-convex parts is provided on a surface of the fixed contact that faces the movable contact, a plurality of concavo-convex portions is provided on another surface of the fixed contact that faces an anti movable-contact side, the concavo-convex portions are arranged so that positions of concave parts of the concavo-convex portions match positions of convex parts of the concavo-convex parts provided in the opposite surface of the fixed contact, the plurality of concavo-convex parts are at least partly curved, and have the same height and project in a height direction from the fixed contact.