| 摘要 |
According to one embodiment, an electronic device includes a housing including an exterior cover, a first rib integrated with an inner wall surface of the exterior cover facing the inside of the housing and arranged to define a plurality of first sections therein, a second rib integrated with the inner wall surface and the first rib as one unit and arranged to define a plurality of second sections therein, a plurality of projection portions projecting from the inner wall surface and each integrated with the inner wall surface and located within a respective one of the plurality of first sections, and third ribs connecting the first rib and the projection portions, respectively, and being continuous to the second ribs, respectively.
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