| 摘要 |
PROBLEM TO BE SOLVED: To improve the reliability of a waterproof function.SOLUTION: An electronic substrate 5 is housed in an inner frame 2b of a double frame case 2 with a closed bottom where one end surface is opened. An inner lid 3 made of an elastic material is fitted into an outer periphery of the inner frame 2b utilizing its elastic force, and the inner frame 2b is covered by the inner lid 3 from the opened one end surface side. Thus, when an outer lid 4 covering an outer frame 2a and the inner lid 3 from the opened one end surface side is removed and the engagement is loosened, the sealability of the inner frame 2b that forms a housing part 6 of the electronic substrate 5 is not affected and water intrusion is prevented. |
