Patent ID: 8009411

Claim:
An electronic device comprising: a housing; and a circuit board contained in the housing, wherein the housing comprises a first wall, a second wall integrally formed with the first wall, a third wall integrally formed with the first wall, the third wall facing the second wall, at least one first rib integrally formed with the second wall and the first wall and extending from the second wall toward the third wall, the at least one first rib including a first rib having a first end portion separated from the third wall, and a least one second rib integrally formed with the third wall and the first wall and extending from the third wall toward the second wall, the at least one second rib including a second rib having a second end portion separated from the second wall, wherein each of the at least one first rib and the at least one second rib (i) being arranged alternately one by one in an arrangement direction, (ii) being arranged adjacent to each other, and (iii) having facing areas facing to each other along the arrangement direction.