1. A switch device for use in an electronic device, comprising: a circuit board including a sidewall; a plurality of conductive portions formed on the sidewall; and a movable unit including at least a conducting part and moving between a first position and a second position, wherein the conducting part includes a metal plate, when the movable unit is at the first position, the plurality of conductive portions are electrically insulated from each other and the metal plate is electrically connected to one of the plurality of conductive portions; when the movable unit moves to the second position, at least two of the plurality of conductive portions are electrically connected via the conducting part and the metal plate is deformed to cause the at least two of the plurality of conductive portions to be electrically connected.