| 摘要 |
A mobile terminal apparatus includes a first casing that is provided with an operation portion; a second casing that is disposed so as to oppose a front surface of the first casing in which the operation portion is provided, the second casing being rotatable parallel to the front surface around a center positioned in a portion other than the operation portion of the front surface; and a protruding portion that is formed between the operation portion and the center on a surface of either the first casing or the second casing, the surface with the protruding portion opposing the other casing, the protruding portion protrudes toward the other casing by a height greater than or equal to a gap provided between the casings at the center.
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