Patent ID: 8294545

Claim:
An electromagnetic coupling device comprising: a coil assembly comprising an exciting coil, a lead wire connected to a winding start portion of said exciting coil, a surge voltage absorbing member connected to a winding end portion of said exciting coil protruding from an end face of said exciting coil, a storage member which is made of an insulating material and includes a recess portion to store said surge voltage absorbing member, and a field core comprising an annular groove which stores said coil assembly and a through hole which extends through a bottom portion of said annular groove in an axial direction of said field core, wherein said storage member is press-fitted into said through hole with an opening of said recess portion facing said exciting coil, and said surge voltage absorbing member is stored in a bottom portion of said recess portion so as to be positioned outside said field core by said exciting coil.