Patent ID: 8413177

Claim:
Information processing equipment comprising an optical disc drive and a chassis, wherein the optical disc drive includes: a turntable for rotatably supporting an optical disc; an optical pickup for recording an information signal onto the optical disc and/or reproducing an information signal recorded on the optical disc; and a movement mechanism for moving the optical pickup in a radial direction of the optical disc, wherein a step part extending in a predetermined direction is formed on an inner surface of the chassis in an area where the optical disc drive is fixed, wherein the inner surface of the chassis includes a first fixing point and a second fixing point on opposite sides of the step part from each other, wherein the optical disc drive is fixed to the chassis at the first fixing point and the second fixing point, wherein another step part extending in a direction substantially parallel with said step part is formed on the inner surface of the chassis, wherein the step parts form an elevated region on the inner surface of the chassis and form a recess on an outer surface of the chassis, wherein a recess is formed on an outer surface of the chassis in an area corresponding to the elevated region formed by both the step parts, and an attachment section for attaching in removable manner a card-type external expansion device is provided in the recess, wherein the recess has an opening on a side surface of the chassis, and has enough depth to accommodate a card-slot member for inserting the external expansion device thereinto, and wherein the card-slot member is fixed to the recess in a state where the card-slot member is accommodated in the recess so that right-and-left outer side surfaces of the card-slot member which respectively correspond to right-and-left side of the external expansion device are close to at least a part of vertical walls of the recess.