公开(公告)号：US20220084372A1

公开(公告)日：2022-03-17

申请号：US17079557

申请日：2020-10-26

申请人： PRIMAX ELECTRONICS LTD.

发明人： TSAI-YU YU ,  HUNG-CHEN WU ,  TENG-CHIEH YANG

IPC分类号： G08B3/10 ,  G08B7/06

摘要： A doorbell system includes a power supply circuit, a smart module, a chime, a chime switch and a control module. The smart module provides a smart function. The chime switch is electrically connected between the control module, the smart module, and the power supply circuit. When the chime switch is turned on, the current flows through the chime under control of the control module. When the chime switch is turned off, the current cannot flow through the chime under control of the control module; consequently, the buzzing sound cannot be generated.