Patent ID: 6768254
Filing Date: 2004-07-27
Classification: H01J

Abstract:
A self-ballasted electrodeless discharge lamp comprising:a discharge vessel having a cavity; an induction coil that is inserted into the cavity; a ballast for supplying power to the induction coil; a case for covering the ballast; and a lamp base provided in the case, wherein the discharge vessel is secured to the case via a holder, said holder being disposed within the confines of the case, a part of the discharge vessel and a first portion of the holder are engaged with each other to constitute a combination structure, and a second portion of the holder and a part of the case are engaged with each other to constitute a combination structure; and wherein the part of the discharge vessel is a protrusion extending to a second direction substantially perpendicular to a first direction, the induction coil being inserted in the first direction, the first portion of the holder is a recess that clamps the protrusion and has a substantially U-shaped cross section, a notched portion having a size that allows the protrusion to move in a direction substantially perpendicular to the second direction is provided in a periphery of the recess of the holder, the holder has an engagement structure that allows the protrusion to be engaged with the recess by inserting the protrusion of the discharge vessel to the notched portion of the holder, and then rotating the discharge vessel around a portion into which the induction coil is inserted.