| 摘要 |
A mobile device has a push-button type operation unit at a side surface of a body case. The body case has a dual-partitioned structure of a first case and a second case. The first case includes a main portion having a plane substantially parallel to a partitioning surface of the cases, and a side wall extending in a direction substantially orthogonal to the main portion from four side ends of the main portion. The side wall and the second case are separably coupled. A waterproof rubber is attached on an inner side of the main portion and the side wall of the first case. An electronic circuit substrate mounted with a switch corresponding to the operation unit is at least accommodated on an inner side of the waterproof rubber. The waterproof rubber includes a sandwiching portion inserted to a bonding site of the first case and the second case, and a side wall interposed between the operation unit and the switch.
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