Abstract: An electrical connection structure is provided. The electrical connection structure includes a through hole, a first pad, a second pad and a conductive bridge. The through hole has a first end and a second end. The first pad at least partially surrounds the first end of the through hole and is electrically connected to a first circuit. The second pad is located at the second end of the through hole and is electrically connected to a second circuit. The conductive bridge is connected to the first pad and second pad through the through hole, thereby making the first and second circuits electrically connected to each other.

Abstract: A disk ejection device of a portable computer and controlled method thereof, the disk ejection device includes a cover installed on a computer body of the portable computer, at least one torsional spring coupled between the computer body and the cover for providing a preliminary torque force to let the cover be in a closed state, and a controlled button disposed on the computer body for controlling a disk ejection thereby to push the cover. Furthermore, the prior optical disk drive can be replaced by the other optical disk drives with different size-designed front boards, and the portable computer still can have a good-looking appearance due to the cover.

Abstract: An upgrading apparatus provides upgrading function for a portable computer. The portable computer has a body, a display, a keyboard and a motherboard. The upgrading apparatus comprises an accommodating chamber placed at predetermined location of the body; an expansion unit in the accommodating unit; and an upgrading graphic card connected to the expansion unit. The expansion unit is electrically connected to the motherboard whereby a user can update the function of the portable computer by assembling the upgrading graphic card to the expansion unit and connecting the expansion unit to the motherboard.