| 摘要 |
PROBLEM TO BE SOLVED: To provide a lamp device which has good assemblability and which can reduce a thermal effect of a lightning circuit.SOLUTION: A lamp device includes: a cylindrical housing 11; a light-emitting module arranged on one end side of the housing 11; and a lightning circuit arranged in the housing 11. The housing 11 has: a first housing part 21; a second housing part 22 located inside the first housing part 21; and a third housing part 23 located inside the second housing 22. The first housing part 21, the second housing part 22 and the third housing part 23 have mutually different thermal conductivity, and the thermal conductivity of the second housing part 22 is the highest. The first housing 21, the second housing 22 and the third housing 23 are molded integrally.SELECTED DRAWING: Figure 1 |
