Sound device and terminal

The utility model discloses a squealer and a terminal, the squealer comprises a shell and a piezoelectric vibration plate, the piezoelectric vibration plate is arranged in the shell, the piezoelectric vibration plate comprises a metal plate and a piezoelectric element attached to the lower surface o...

Full description

Saved in:
Bibliographic Details
Main Authors JIN XUEGUI, CHEN LI, LI DINGWEI
Format Patent
LanguageChinese
English
Published 20.09.2019
Subjects
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
Online AccessGet full text

Cover

More Information
Summary:The utility model discloses a squealer and a terminal, the squealer comprises a shell and a piezoelectric vibration plate, the piezoelectric vibration plate is arranged in the shell, the piezoelectric vibration plate comprises a metal plate and a piezoelectric element attached to the lower surface of the metal plate, the metal plate is matched with the shell to form an upper cavity, and the shell is provided with a sounding hole communicated with the upper cavity; the PCB, the metal plate and the shell are matched to form a lower cavity, the PCB is connected with the metal plate through a first lead and connected with the piezoelectric element through a second lead, the PCB is provided with a vent hole communicated with the lower cavity, and the PCB is connected with an external signal. According to the squealer, the PCB is provided with the vent hole; by arranging the vent holes in the upper cavity and the lower cavity, gas expanded by heating in the lower cavity can be exhausted through the vent holes in th
Bibliography:Application Number: CN201920485943U