Patent ID: 8433377

Claim:
A sound-amplifying case for a mobile device with a front face, a rear face, a top edge, a bottom edge, two side edges, a camera lens, and a speaker, the mobile device case comprising: a body for covering the rear face of the mobile device and comprising a plurality of fastening portions configured to fasten the mobile device, a plurality of utility holes for exposing portions of the mobile device, a base groove, and a cut-out opening provided at a part of the base groove; a pop-up plate with an edge hinged to a portion of the body so as to cover the cut-out opening of the body; an inner support plate provided on an inner surface of the base groove so as to cover the cut-out opening, the inner support plate comprising one or more sound-guiding holes for guiding sound from the mobile device into a gap between the inner support plate and the pop-up plate; a wedge-shape bellow sound amplifier provided between the inner support plate and the pop-up plate configured for amplifying the sound through the one or more sound-guiding holes from the mobile device; a plurality of first magnets provided in the pop-up plate for attracting and holding the pop-up plate to the inner support plate; and a spring device provided between the pop-up plate and the inner support plate, configured for opening the wedge-shaped bellow sound amplifier along with the pop-up plate, wherein the plurality of first magnets and the spring device are configured such that the pop-up plate is kept closed when the pop-up plate is forced to be closed against the cut-out opening and is flipped open when the pop-up plate is detached and opened by a predetermined angle with respect to the hinging edge.