An electronic device using a cover mechanism to cover a hole is described. The cover mechanism includes a base member, a cover member and a retaining member. The cover member is fixed with the retaining member and moves between a closed position and an opened position. In the closed position, the cover member is elastically, partially deformed to lock to the base member. In the opened position, the cover member can be elastically bent to expose the hole while still being physically attached to the base member.