US Patent 7764936 Dust and water resistant electronics enclosure

An electronic device having a configuration which has an operation body formed in substantially a flat shape and in which a side wall of a lower case is brought into elastic contact with an upper case, and a switch provided on a circuit board is sealed in space formed by the circuit board, the side wall and the operation body. A flange that increases the size of the outer shape of the operation body is not required to be formed, it is possible to obtain an electronic device having dustproof and waterproof performances and having a small size.