US Patent 7839996 Folding electronic device, connecting component and camera unit

A folding electronic device has a first frame having plural first joints, a second frame having plural second joints, plural sets of hinge joints in which the plural first joints and the plural second joints are connected together in a manner that the first frame and the second frame can rotate on a predetermined rotation axis, a first body containing the first frame, and a second body containing the second frame, wherein at least one set of hinge joint of the plural sets of hinge joints has a connecting component having a hollow portion and wherein the other sets of hinge joints have predetermined solid hinge shafts.