Patent ID: 7551049

Claim:
An electromagnetic switch comprising: a plunger to be attracted through electromagnetic force; fixed contacts to be joined to a motor circuit of a starter; a moving contact working to establish electric communication between said fixed contacts; a plunger shaft which retains said moving contact through an insulator, said plunger working to move said moving contact following magnetic attraction of said plunger to bring said moving contact into abutment with said fixed contacts to establish the electric communication therebetween; and a rotation holder disposed between said moving contact and said insulator, said rotation holder working to hold said moving contact and the insulator from rotating relative to each other, wherein said moving contact is so retained that said moving contact hits at substantially the same areas thereof with said fixed contacts, and wherein the insulator is made of a resin mold in which a weld is formed in a location other than a portion of the insulator on which a maximum impact load acts when said plunger is magnetically attracted to bring said moving contact into abutment with said fixed contacts.