EXPENDABLE AND COLLAPSIBLE SOUND AMPLIFYING CELLULAR PHONE CASE

摘要

A sound-amplifying case for a mobile device is provided. The sound guide groove is provided under a portion of the body and opened over the speaker of the mobile device for guiding sound from the speaker toward the pop-up plate. The sound guide hole is provided through a portion of the base groove of the body exposing the speaker of the mobile device to the sound guide groove. The blockable sound slit is provided between the body and the pop-up plate above the sound guide groove, and the blockable sound slit is configured to open when the pop-up plate is closed down and to close when the pop-up plate is opened up. The wedge-shape bellow sound amplifier comprises first and second foldable pan-shaped plates, and each of them is installed between corresponding side edge of the base groove of the body and corresponding inner edge of the pop-up plate.