| 摘要 |
PROBLEM TO BE SOLVED: To secure air circulation between a space for storing a circuit board and the exterior in a housing rear surface part and prevent water intrusion into the storage space.SOLUTION: A housing includes: a rear surface part 6 attached to an installation surface 12a; a front surface part located at the opposite side of the rear surface part 6; and a periphery part 7 located between the rear surface part 6 and the front surface part. The housing may store a circuit board 4 therein. The rear surface part 6 is provided with: a vent hole 14 which communicates with a storage space S in which the circuit board 4 is stored; and a recessed air circulation passage P for opening the vent hole 14 to the periphery part 7. |
