Patent ID: 8526190

Claim:
A mobile terminal apparatus comprising: an upper case; a lower case; a sliding rotation mechanism which has a sliding mechanism which is fixed to the upper case to perform a sliding movement on the upper case through a sliding supporting plate for slide-movably supporting the upper case and a rotation mechanism which rotates the upper case with respect to the lower case, which performs an opening-direction sliding movement on the upper case through the sliding supporting plate at the time of an opening manipulation, which allows the upper case to stand up at a predetermined angle with respect to the lower case by performing an opening-direction rotation movement on the upper case through the sliding supporting plate after the opening-direction sliding movement, which performs a closing-direction rotation movement opposite to the opening-direction rotation movement on the upper case, which allows the upper case to stand up at the predetermined angle with respect to the lower case through the sliding supporting plate at the time of a closing manipulation, and which performs a closing-direction sliding movement opposite to the opening-direction sliding movement on the upper case through the sliding supporting plate after the closing-direction rotation movement; and a protrusion member which is fixed to the upper case so as to protrude from the upper case toward the lower case; and a lock block which is fixed to the rotation mechanism so as to rotate in cooperation with the rotation mechanism of the sliding rotation mechanism and which is in contact with the protrusion member disposed to the upper case so as to restrict the sliding movement of the upper case when the upper case is allowed to slidingly move in the closing-direction in the state where the upper case is allowed to stand up at the predetermined angle with respect to the lower case.