Patent ID: 8369908

Claim:
A portable electronic device comprising: a first cover including a main board, a sidewall and a transverse board perpendicularly extending from the main board and the sidewall, two parallel cylindrical pivots, each cylindrical pivot having an outer surface, and each cylindrical pivot extending from the transverse board and being parallel to the main board, the pivots defining a space therebetween; a second cover, the first cover attached to the second cover, the first cover and the second cover defining a cavity and an opening, a first electronic connecting port being positioned adjacent to the opening, a button being set on the first cover; a fixed keypad mounted on the first cover, electronically connecting with the first electronic connecting port; a movable keypad received in the cavity of the first cover and the second cover, a second electronic connecting port being attached to one end of the movable keypad; and a driving module fixed in the cavity, the driving module including a swing board having first and second opposite planar surfaces and freely received in the space between the two pivots with the first planar surface in contact with and rolling over the outer surface of one of the pivots and the second planar surface in contact with and rolling over the outer surface of the other pivot, the swing board having a resisting end resisting the button and a latching end for latching the movable keypad, when the button is pressed to descend the resisting end, the latching end is raised and releases the moveable keypad, and the movable keypad moves out of the cavity through the opening and the movable keypad electronically connecting with the fixed keypad by the first electronic connecting port touching the second electronic connecting port wherein the driving module further comprises at least one second spring, at least one guide post is fixed between opposite sidewalls of the second cover, the movable keypad is attached to and slidable relative to the at least one guide post, and the at least one second spring is mounted on one end of the at least one guide post, resisting one end of the movable keypad; wherein the driving module further comprises a first spring, a column is formed on the first cover, one end of the first spring is fixed to the column and another end resists the swing board, and the first spring and the button are positioned at opposite sides of the pivots.