Patent ID: 8311598

Claim:
A mobile terminal apparatus comprising: a first cabinet; a second cabinet; a slide holding mechanism for holding a first cabinet and a second cabinet slidable during a shift from an closed state in which the first cabinet and the second cabinet substantially fully overlap one another to an open state in which a certain part of the first cabinet and a certain part of the second cabinet overlap one another; a keyboard held within the second cabinet, the keyboard being disposed movable in slide directions of the first cabinet and the second cabinet; a first urging member urging the keyboard in an ejection direction opposite to a direction in which the first cabinet moves when the first cabinet and the second cabinet are placed in the open state; a hook disposed at a retraction side end opposite to an ejection side end, which is an end in the ejection direction of the keyboard; a keyboard lock member including a projection projecting from a sliding contact surface of the second cabinet, the sliding contact surface being in sliding contact with the first cabinet, and a notch engaged with the hook, the keyboard lock member being disposed on the second cabinet movable only in a direction orthogonal to the slide direction of the second cabinet with the projection projecting from the sliding contact surface of the second cabinet; a second urging member urging the keyboard lock member in a direction in which the notch is engaged with the hook; a sliding groove that is disposed in the first cabinet in the slide direction of the first cabinet to slide the projection of the keyboard lock member, the sliding groove including a locking groove and a lock releasing groove communicating with the locking groove, the locking groove being used to move the keyboard lock member via the projection in a direction in which the notch of the keyboard lock member is engaged with the hook when the first cabinet and the second cabinet are placed in the closed state and when the first cabinet and the second cabinet move from the closed state toward the open state, the lock releasing groove being used to move the keyboard lock member via the projection in a direction in which the hook is removed from the notch of the keyboard lock member when the first cabinet and the second cabinet are placed in or are adjacent to the open state; wherein the hook is engaged with the notch of the keyboard lock member to hold the keyboard within the second cabinet when the first cabinet and the second cabinet are placed in the closed state or the hook is removed from the notch of the keyboard lock member when the first cabinet and the second cabinet are placed in or are adjacent to the open state and, when the first cabinet and the second cabinet are placed in or are adjacent to the open state, the keyboard is urged in the ejection direction by the first urging member to let the keyboard eject from the second cabinet.