Patent ID: 7990723

Claim:
A housing structure of an acoustic controller, comprising: a housing comprised of a lower case and an upper unit having its operation panel surface, the acoustic controller being adapted to be usable both in a stationarily placed state where it is stationarily placed on a flat surface and in a rack-mounted state, wherein the lower case is integrally formed by a resin and has a bottom surface thereof adapted to face the flat surface when the acoustic controller is in the stationarily placed state, the bottom surface of the lower case is formed with a concave-forming portion which is convex upward when the acoustic controller is in the stationarily placed state, and a convex-forming portion disposed at a location rearward of the concave-forming portion so as to be made in contact with the flat surface when the acoustic controller is in the stationarily placed state, at least one heat generating component part is disposed inside the convex-forming portion, the concave-forming portion of the lower case has a part thereof formed with at least a first heat radiation opening, said housing has at least a second heat radiation opening formed therein on a side thereof opposite from the first heat radiation opening, with said heat generating component part interposed between the first and second heat radiation openings, and the first heat radiation opening is located below the at least one heat generating component part and the second heat radiation opening is located above the at least one heat generating component part when the acoustic controller is in the stationarily placed state and in the rack-mounted state.