| 摘要 |
PURPOSE:To improve the reliability by arranging a fluorescent lamp and a resistor ballast in partitioned light emission chamber of outer casing while an inductance element in non-light emission chamber. CONSTITUTION:The light emission chamber 7 in the outer housing 4 is brought to high temperature by the heat produced through lighting lamp 11 or resistor ballast 18, but the non-light emission chamber 6 at the cover side 1 is partitioned by a partition member 5 to be held at low temperature to cause thermal influence scarcely to an inductance element 19, glow starter 22, etc. Since the element 19 is contained in a tubular section 8 while the tip section is separated from the partition member 5, heat from said member 5 is blocked to suppress thermal influence thus to protect reliably from the heat produced through lighting. The other end at the opposite side of said element 19 will enter into the base metal 10 to ensure the separation distance against the member 5 sufficiently thus to reduce thermal influence. |
