Embodiments describe a hinge for a case that stores wireless listening devices, including: a first shaft forming a first pivot point for the hinge; a second shaft forming a second pivot point for the hinge, the first shaft and the second shaft defining a conversion axis; a piston rod having a first end and a second end, the first end coupled to the second shaft and a second end opposite from the first end coupled to a stopper; a piston guide slidably coupled to the piston rod between the first end and the second end of the piston rod; a third shaft forming a third pivot point for the piston guide, the third shaft allowing the piston guide to rotate and maintain concentric alignment with the piston guide; and a spring positioned between the second shaft and the piston guide and wound around the piston rod.