Patent ID: 8217543

Claim:
An electromagnetic clutch comprising: a motor; a worm wheel rotatably driven by a motor; a rotor having an electromagnetic coil and rotatable about a same rotational axis as said worm wheel; an armature that is mounted to said worm wheel and is pulled into contact with said rotor upon application of electric power to said electromagnetic coil, so that said armature is rotated with said rotor; and a cover member configured to cover said rotor and said armature; a power supply mechanism disposed between said cover member and said rotor and connected to a power source for supplying power to said electromagnetic coil; wherein said power supply mechanism includes: a fixed frame body having a first power supply portion for receiving the power from said power source and fixed to said cover member; a rotary frame body having a second power supply portion in contact with said first power supply portion for supplying the power to said electromagnetic coil, said rotary frame body being fixed to said rotor and engaged with said fixed frame body rotatably relative to said fixed frame body; and a plate-like conducting member provided in said cover member, said conducting member coming into contact with a portion of said first power supply portion projecting from said fixed frame body.