Patent ID: 7138895

Claim:
A field coil assembly of an electromagnetic clutch for a compressor comprising: an electromagnetic coil body having an electromagnetic coil wound thereon in a ring type and a coil wire drawn out from an end portion thereof; a bobbin accommodating the electromagnetic coil body therein and having a protrusion formed on a side of the upper portion thereof and a communicating passage formed on the protrusion for allowing resin to flow through the communicating passage; a core ring having a throughhole formed on a side of the upper portion thereof for exposing the protrusion and the coil wire to the outside therethrough and an opened part formed on the lower portion thereof for accommodating the bobbin therein; and a sleeve having a coil wire compressing portion formed at one side end portion thereof and electrically connected with the coil wire, terminals formed at the other side end portion thereof and connected with an external power supply, and a body integrally formed in such a way as to surround the terminals, the sleeve being temporarily fixed on the core ring, whereby the electromagnetic coil body is molded and fixed inside the core ring by filling the opened part of the core ring with resin, and the coil wire and the coil wire compressing portion are molded with some of the resin flowing through the communicating passage of the bobbin so as to improve sealing efficiency.