| 摘要 |
A printed circuit board (PCB) is attached on a surface of a tray that is opposed to a chassis main or a bottom plate of a housing. On the tray and in a vicinity of a position where the PCB is disposed, a first protruding portion is formed to protrude toward the chassis main, on which a second protruding portion is formed at a position to be opposed to the first protruding portion. Between the first protruding portion and the second protruding portion is a clearance while the tray is accommodated in the housing. When the tray deforms, the second protruding portion supports the first protruding portion to prevent further deformation of the tray.
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