公开(公告)号：US20230141955A1

公开(公告)日：2023-05-11

申请号：US17802690

申请日：2021-01-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Junqing Luo ,  Jie Su ,  Ligang Yu ,  Fanfan Liu ,  Jing Chang ,  Shizhe Li ,  Senjun Chen

IPC: H04R1/02 ,  A45C11/00

CPC classification number: H04R1/028 ,  A45C11/00 ,  A45C2011/002 ,  H04R17/00

Abstract: A terminal protective case and an audio playback system, the case including a housing, a diaphragm, a piezoelectric sheet, and a drive circuit. The housing has a main body part and a fastening frame part, a side of the fastening frame part is fastened to a periphery of the main body part, the fastening frame part and the main body part jointly enclose an accommodating groove configured to accommodate a terminal. The diaphragm is within the main body part, the piezoelectric sheet is fastened to the diaphragm, a front cavity is on a side of the diaphragm, a sound outlet hole is disposed on the main body part, and the sound outlet hole connects the front cavity to the outside of the main body part. The drive circuit is within the main body part and connected to the piezoelectric sheet, and is configured to drive the piezoelectric sheet.