Patent ID: 8145284

Claim:
A portable terminal comprising: a first casing including a first wiring board, a first operation portion, a first surface on which the first operation portion is disposed, a second surface which faces in a direction opposite to the first surface, a peripheral surface which connects a peripheral edge of the first surface and a peripheral edge of the second surface, and an accommodating portion which is disposed between the first surface and the second surface and which is opened in the peripheral surface; a second casing including a second wiring board which is electrically connected to the first wiring board, a second operation portion, a first surface on which the second operation portion is disposed, and a second surface which faces in a direction opposite to the first surface, the second casing being configured to be accommodated in the accommodating portion of the first casing through the opening; a casing movement guiding/supporting mechanism interposed between a side portion of the first casing and a side portion of the second casing in at least one of two direct opposite directions which intersect a moving locus of the second casing between a retracted position and an extended position along the first surface of the first casing, at the retracted position the second casing being accommodated in the accommodating portion of the first casing and at the extended position the second casing being extended from the accommodating portion into an external space through the opening, and the guiding/supporting mechanism supporting the second casing to be movable linearly in a longitudinal direction of the first casing between the retracted position and the extended position; a locking mechanism selectively locking the second casing at the retracted position, and allowing a movement of the second casing between the retracted position and the extended position when the locking mechanism unlocks the second casing; and a battery accommodating chamber provided in at least one of the first casing and the second casing and accommodating a battery for supplying electricity to the first wiring board and the second wiring board, wherein the second surface of the first casing includes an opening which exposes at least one part of the second surface of the second casing disposed at the retracted position.