Patent ID: 9515534
Filing Date: 2016-12-06
CPC Classification: F16D,H01F,H02K

Claim Text:
1. An electromagnetic coupling device comprising an electromagnet including an annular yoke internally provided with an electromagnetic coil, and an insulative terminal casing fixed to the yoke, wherein the terminal casing has a first groove to which opposite ends bent in a direction away from each other of a winding of the electromagnetic coil are fitted, the electromagnetic coil is led into the terminal casing, and a second groove crossing the first groove, the terminal casing has a pair of terminal members fitted to the second groove, the terminal members are connected to lead wires for conduction to the ends of the winding, and for connection with an external electric circuit for supplying a power the terminal member has a connection piece having a slit into to which each of the ends of the winding extending across the second groove is press-fitted, and materials forming the winding of the electromagnetic coil and the connection piece are different kinds of metal materials, the opposite ends of the winding of the electromagnetic coil are respectively connected to terminal lines by caulking coil terminals, the terminal lines are made of a metal material that is different in kind from the material forming the winding of the electromagnetic coil, an end of each terminal line forms an end of the electromagnetic coil and is fitted to the first groove, and the terminal line, made of a material that is the same in kind as the material forming the connection piece, is fitted to the slit formed in the connection piece.