| 摘要 |
Disclosed is a mobile phone protective case with sound amplification function which can amplify the sound of the speaker of a mobile phone just by being attached to the same. An aspect of the present invention relates to a mobile phone protective case incorporating a speaker to output sound via a speaker hole placed at one side of the case, comprising: a rear surface part covering the rear surface of the mobile phone; and a grip part formed integrally with the rear surface part to cover the edges of the sides and the upper surface of the mobile phone, wherein: the rear surface part or the grip part has a protrusion part protruding outward at the position where the speaker hole is formed and a cavity at the inner side facing to the speaker hole; the inner surface of the rear surface part has a pair of guide walls to guide the sound outputted to the cavity to the other side; and the sound gone through the pair of guide walls is transmitted to the outside via a plurality of output outlets formed at the rear surface part. |
