Patent ID: 8837146

Claim:
A foldable electronic device comprising: a main body defining a through hole; a cover rotatably connected to the main body, the cover comprising a hook passable through the through hole; a slidable member slidably connected to the main body, the slidable member comprising a hook receiver and a wedged portion, the hook receiver comprising an engaging projection, the engaging projection being configured for engaging with the hook, thereby locking the cover on the main body; and a button depressibly mounted on the main body, the button comprising a protruding tab configured to push the wedged portion, when the button is depressed, to cause the slidable member to move along a direction substantially perpendicular to the depressing direction of the button, thereby disengaging the hook from the engaging projection; wherein the hook receiver comprises a wall and a top portion protruding laterally from one side of the wall, the engaging projection protrudes from one end of the top portion, the main body comprises a shield adjacent to the through hole, the shield cooperates with the wall to shield the through hole, thereby preventing dust from entering into the main body via the through hole.