A left electronic-component compartment (16) has a left FPC receiving port (16A), through which an FPC (24) is inserted into the left electronic-component compartment (16), located adjacent to a left hinge (8). In the left electronic-component compartment (16), a left waterproof member (26) is fitted adjacent to a left connector (25), which serves as a connection between the FPC (24) and a battery (20). The left waterproof member (26) prevents moisture, dust, and other foreign matter from entering the battery (20) and is made of, for example, PORON (registered trademark). A right electronic-component compartment (19) has a right FPC receiving port (19A), through which the FPC (24) is inserted into the right electronic-component compartment (19), located adjacent to a hinge (9). In the right electronic-component compartment (19), a right waterproof member (28) is fitted adjacent to a right connector (27), serving as a connection between the FPC (24) and electric circuitry (21). The right waterproof member (28) prevents moisture, dust, and other foreign matter from entering the electric circuitry (21) and is made of, for example, PORON (registered trademark).
