Abstract: An electromagnetic switch comprising: an excitation coil wound around a bobbin made of a synthetic resin material; a yoke accommodating said excitation coil; a fixed core fixed inside of a first end side of said yoke; a magnetic path plate contacting an outer end of a flange at a second end side opposite to said first end side of said bobbin and fixed inside of said second end side of the yoke; a bush made of a nonmagnetic material and fixed in an inner periphery of the bobbin; a movable core movably supported in said bush in the axial direction thereof; and terminal means closed by urging to press said terminal means by a magnetic suction of said movable core to said fixed core; wherein a plurality of arms are extended in the axial direction from an inner peripheral portion of the bobbin at the second end side thereof; a receiving portion is formed at end portions of said respective arms integrally therewith; cut-off portions are provided for passing the respective arms therethrough at an inner peripheral po

Abstract: In a starter motor, its electromagnetic switch has a movable contact cooperating with normally open contact member and normally closed contact member, and a part of a stationary contact in the normally closed contact member is formed into a locking piece to prevent the movable contact from contacting the passage formed in the cap of the switch, or the electromagnetic switch has a first movable contact cooperating with normally open contact member and a second movable contact cooperating with normally closed contact member, and an insulating partition wall is disposed between the first and second movable contacts, whereby the creeping distance between the normally open contact member and the normally closed contact member is increased as much, and the occurrence of current leakage is prevented.