Patent ID: 8200294

Claim:
A mobile terminal apparatus, comprising: a first housing on which a display unit is provided at an open side of the first housing; a second housing on which a keyboard is provided at an exposing side of the second housing, the exposing side being exposed when the first and second housings are in an open state; and a slide holding mechanism configured to hold the first and second housings such that the first and second housings are slidable, wherein the slide holding mechanism includes a rail unit provided in the first housing and including a pair of rail parts that extend along a sliding direction of the first and second housings, a pair of arm members, a pair of rotation-slide connection members, each rotation-slide connection member including a rotation shaft that extends in a direction perpendicular to the sliding direction and connecting one end portion of the corresponding arm member to the corresponding rail part such that the arm member is slidable and rotatable, extension lines of the rotation shafts included in the rotation-slide connection members being separated from each other by a predetermined distance in the sliding direction, and a pair of rotation connection members, each rotation connection member including a rotation shaft that extends in the direction perpendicular to the sliding direction and connecting the other end portion of the corresponding arm member to the second housing such that the arm member is rotatable, extension lines of the rotation shafts included in the rotation connection members being separated from each other by the predetermined distance in the sliding direction, wherein the slide holding mechanism holds the first and second housings such that the first and second housings are slidable between a closed state in which the first and second housings substantially entirely overlap and the open state in which the display unit provided on the first housing and the keyboard provided on the second housing are positioned on substantially the same plane and wherein each one of the pair of rail parts has a rail guide slot, respective ones of the pair of rail guide slots are sized to rotatably and slidably receive a respective one of the pair of rotation-slide connection members and are offset from each other by the predetermined distance in the sliding direction.