ELECTRODELESS DISCHARGE LAMP

摘要

An electrodeless discharge lamp is provided which prevents the problem of decrease in strength due to degradation of resin material, allowing secure fitting of a lamp part and a coupler member to a base even if it is used for a long time. A bulb (2) containing a discharge gas and a coupler member (4) for generating a high frequency electromagnetic field to excite the bulb (2) are detachably fitted to each other via a base (3) for fixing and supporting the bulb (2). The bulb (2) and the base (3) form a lamp part. The base (3) comprises a base frame (32) formed of a metal such as aluminum and a base cover (31) formed e.g. of synthetic resin. The base frame (32) has a coupler member fitting portion (320) which is provided at a lower part thereof and fitted to the coupler member (4), wherein bulb fixing posts (325) provided to stand on the coupler member fitting portion (320) fix a bulb outer tube (21). Thus, the fitting portions of the lamp part and the coupler member (4) to the base (3) undergo less material degradation than a conventional one which uses a base of resin material.