Double-film type piezoelectric ceramic loudspeaker
A technology of piezoelectric ceramics and piezoelectric ceramic sheets, applied in piezoelectric/electrostrictive transducers, sensors, electrical components, etc., can solve the problems of insufficient sound quality, damage to other devices, losses, etc., to avoid current accumulation , Make up for the lack of bass and improve the service life
Active Publication Date: 2012-12-12
ZHANGJIAGANG YUTONG ELECTRONICS TECH
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Problems solved by technology
[0004] The main disadvantage of the piezoelectric ceramic speaker with the above structure is: since the piezoelectric ceramic sheet and the metal film are directly attached and installed, the piezoelectric ceramic sheet will conduct with the metal film to generate current accumulation or static electricity, thereby causing damage to other devices ——such as the motherboard in the mobile phone, etc., causing unnecessary losses
In addition, the sound produced by the vibration of the piezoelectric ceramic sheet in the piezoelectric ceramic speaker with the above structure is insufficient in bass, and the sound quality is not satisfactory.
Method used
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[0011] The present invention will be further described below in conjunction with the accompanying drawings.
[0012] see figure 1 As shown, the double-membrane piezoelectric ceramic speaker of the present invention includes a front cover 101, a positioning boss 1011 is arranged on the outer side of the front cover 101, and an insulating organic vibration Diaphragm 102, a metal thin film 103 is arranged on the upper side of the organic diaphragm 102; an insulating organic diaphragm 104 is also arranged on the upper side of the metal thin film 103, and a single crystal piezoelectric diaphragm 104 is arranged on the upper side The electric ceramic sheet 107, the metal thin film 103, the single crystal piezoelectric ceramic sheet 107, and the organic vibrating diaphragms 102, 104 arranged on both sides of the metal thin film 103 constitute the vibration assembly of the piezoelectric ceramic speaker; the flexible printed circuit board 105 is pressed on the single crystal piezoelec...
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The invention discloses a double-film type piezoelectric ceramic loudspeaker which can prevent current crowding or static electricity and improve sound quality. The double-film type piezoelectric ceramic loudspeaker comprises a front cover, wherein a vibrating component which consists of a metal thin film, a monocrystalline piezoelectric ceramic sheet and organic vibrating films which are arranged on the two sides of the metal thin film is arranged inside the front cover; a flexible printed circuit board is pressed on the monocrystalline piezoelectric ceramic sheet and electrically connected with the monocrystalline piezoelectric ceramic sheet; the metal thin film, the monocrystalline piezoelectric ceramic sheet, the organic vibrating films which are arranged on the two sides of the metalthin film and the flexible printed circuit board form a piezoelectric sounding device of the piezoelectric ceramic loudspeaker; a rear cover is also fixed on the front cover; and the piezoelectric sounding device is fixedly arranged in a cavity between the rear cover and the front cover. The double-film type piezoelectric ceramic loudspeaker of the structure is suitable to be used for replaying sound and music in a portable equipment terminal.
Description
technical field [0001] The invention relates to a piezoelectric ceramic speaker, in particular to a piezoelectric ceramic speaker used for reproducing voice and music in a portable device terminal. Background technique [0002] Currently commonly used piezoelectric ceramic speakers include a front cover, a metal film is arranged on the inside of the front cover, and a single crystal piezoelectric ceramic sheet is arranged on the metal film. The metal film and single crystal piezoelectric ceramic sheet constitute the vibration component of the piezoelectric ceramic speaker. , the flexible printed circuit board is pressed on the single crystal piezoelectric ceramic sheet and electrically connected with the single crystal piezoelectric ceramic sheet, and the metal film, single crystal piezoelectric ceramic sheet and flexible printed circuit board constitute a piezoelectric sound-generating device; A rear cover is also fixedly arranged on the front cover, and the piezoelectric s...
Claims
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IPC IPC(8): H04R17/00
Inventor 贾开成贾军壮
Owner ZHANGJIAGANG YUTONG ELECTRONICS TECH