LIGHT EMITTING TUBE FOR METAL HALIDE LAMP MADE BY INJECTION MOLDED CERAMICS HAVING NON-TAPERED END AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To integrally bond the first hollow body member with an end cap and to let a level of a seal gap become lower by making parts of the same diameter be mutually fixed. SOLUTION: The light emitting tube for a metal halide lamp made by ceramics includes the first hollow body member (40), and the first body member is made to have a taper over the major part of the length, and molded parts are made to be facilitated to be plugged out from a pin in assembling. An opening end (46) of the first body member has a constant diameter (60), and it is capable of being bonded with the constant diameter part (72) of the second body member or with the end cap (70).