Patent ID: 8857658

Claim:
A packaging container, comprising: a base; a cover comprising a resilient unit and defining a deformable slot at said resilient unit; and a positioning hinge member provided at said base and rotatably received at said deformable slot to pivotally couple said cover with said base so as to enable said cover being pivotally folded between an opened position and a closed position, wherein said positioning hinge member has a non-circular cross section and is arranged in such a manner that when said positioning hinge member is rotated within said deformable slot, said resilient unit generates a resilient restoring force to assist said cover being folded between said opened and closed positions, wherein said positioning hinge member has a preloaded corner, a cornering point and a positioning corner that said positioning hinge member is rotated from said preloaded corner to said positioning corner through said cornering point in order to pivotally fold said cover from said closed position to said opened position.