Patent ID: 7884546

Claim:
An electrodeless discharge lamp apparatus comprising a light-transmitting bulb containing a discharge gas, and a high frequency electromagnetic field generator accommodated in a cavity formed in the bulb for generating a high frequency electromagnetic field, the high frequency electromagnetic field generator comprising: an induction coil through which a high frequency current flows to generate a high frequency electromagnetic field; a core formed of a soft magnetic material and inserted into the induction coil; a heat conductor for conducting heat generated by the induction coil and/or the core, to an inlet of the cavity; and a bobbin made of resin which accommodates and holds the core and/or the heat conductor, and around which the induction coil is wound, wherein the bobbin is separated in a longitudinal direction of the induction coil into two parts which comprise a male-type fitting portion and a female-type fitting portion interlocked with one another.