Patent attributes
An information device system includes a portable information device to which a first chassis and a second chassis are connected, and a keyboard. The portable information device has a foldable display, and a pair of cover plate parts covering a hinge device at both sides, a tip surface being disposed at a position projecting to an inner side in a bending direction of the display than a surface of a bending part of the display as the first chassis and the second chassis rotate. The keyboard has a width along one edge portions equal to or larger than an interval at which the pair of cover plate parts is provided, based on a placement state of being placed at a usage position specified by a top surface of the first chassis, and is provided with an elastic member at corner parts opposed to the pair of cover plate parts.