The sounder structurally has a speaking function, and the driving circuit of the sounder can be matched with the structure of the sounder, so that loud sounds can be provided even when provided voltage is lowered after a battery is used for a long time, and the service life of the sounder is prolonged and the sounder has broad application prospect. A piezoelectric plate is arranged in the shell, is arranged in parallel to and at an interval with the front cover plate and the bottom cover respectively, and is a self-excited piezoelectric ceramic plate and the main electrode, feedback electrode and grounding electrode of the piezoelectric plate are led out of the shell of the piezoelectric sounder respectively, and are connected to a driving circuit of the piezoelectric sounder. A sound hole opposite to the opening is formed in the front surface. The shell is provided with a front surface which is fixedly connected with the front cover plate. An opening is reserved in the center of the front cover plate. The front cover plate, the shell and the bottom cover form an accommodation cavity. The utility model discloses a piezoelectric sounder, which comprises a front cover plate, a shell and a bottom cover. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by NINGBO DONGFANG ELECTRONICS CO Ltd filed Critical NINGBO DONGFANG ELECTRONICS CO Ltd Priority to CN2011204140544U priority Critical patent/CN202352324U/en Application granted granted Critical Publication of CN202352324U publication Critical patent/CN202352324U/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee NINGBO DONGFANG ELECTRONICS CO Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Inventor 王建成 Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number CN2011204140544U Other languages Chinese ( zh) Temperature Range: Operating -30 C to 85 C, Storage -40 C to 95CĬase: Enclosed 24mm Diameter, 34mm with feet. Sound Pressure Level (dBA) at 1" or 30cm: 95 at 12Vp-p. Piezo Ceramic Audio Tranducer, 5kHz, 3-28Vp-p 8mA 12VDC 85dBA 12vp-p.Ĭurrent Consumption at 12VDC (Typical): 8 mA PUI Audio, a Projects Unlimited Company, is a leading developer, manufacturer and supplier of quality audio devices and components including indicators, transducers, speakers, microphones and sirens. PROJECTS UNLIMITED PUI - AT-121 - Audio, Miniature Piezo Audio Transducer.
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