Patent ID: 9665062
Date: 2017-05-30
CPC Classifications: G03G,G10K

Claim:
1. A housing structure comprising: an exterior cover having an opening through which an interior of the exterior cover communicates with an exterior of the exterior cover; an interior cover disposed inside the exterior cover and having an exterior facing the exterior cover with a clearance secured therebetween; an inward projection projecting from the exterior cover to the interior cover; and an outward projection projecting from the interior cover to the exterior cover; wherein the inward projection and the outward projection define an airflow passage in the clearance between the exterior cover and the interior cover, the airflow passage leading to the opening and including multiple bent portions, and an end face of the outward projection closest to the interior of the exterior cover has a width greater than a width of an end face of the inward projection closest to the exterior of the interior cover.