Piezoelectricity ceramic piece and piezoelectricity ceramic loudspeaker adopting same

A technology of piezoelectric ceramic sheets and piezoelectric ceramics, applied in the direction of piezoelectric/electrostrictive transducers, sensors, electrical components, etc., can solve the problems of poor bass reproduction, poor low-frequency characteristics, and large distortion of speakers. Achieve the effect of good intermediate frequency sound quality, improved low frequency characteristics, and low distortion

Inactive Publication Date: 2012-07-04
ZHANGJIAGANG YUTONG ELECTRONICS TECH
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Problems solved by technology

[0002] Currently commonly used piezoelectric ceramics—including single crystal and twin crystal piezoelectric ceramics—are rectangular or circular in shape, and the low-frequency characteristics of piezoelectric ceramics in this shape are poor, usually not lower than 700HZ; The sound quality is poor and the distortion is large between 5KHZ and 6KHZ in the middle frequency band; t

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  • Piezoelectricity ceramic piece and piezoelectricity ceramic loudspeaker adopting same
  • Piezoelectricity ceramic piece and piezoelectricity ceramic loudspeaker adopting same
  • Piezoelectricity ceramic piece and piezoelectricity ceramic loudspeaker adopting same

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Embodiment Construction

[0015] see figure 1 As shown, the piezoelectric ceramic sheet of the present invention is characterized in that: the shape of the piezoelectric ceramic sheet 3 is a butterfly shape with two ends wide and the middle shrinking inward. Moreover, in this embodiment, the lead-out electrode 31 of the piezoelectric ceramic sheet 3 is arranged at the end of the piezoelectric ceramic sheet with a wider size.

[0016] see figure 2 As shown, a preferred embodiment of the piezoelectric ceramic loudspeaker prepared by the piezoelectric ceramic sheet according to the present invention includes: a front cover 1 with a sound-transmitting through hole 11 in the middle part, and an elastic vibrator is fixedly arranged in the front cover 1. Diaphragm 8, the middle part of the front cover 1 is provided with the concave cavity 12 that is conducive to the vibration of the elastic diaphragm 8, and the elastic diaphragm 8 is provided with the butterfly-shaped piezoelectric ceramic sheet 3 and the m...

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Abstract

The invention discloses a piezoelectricity ceramic piece and a piezoelectricity ceramic loudspeaker adopting the same. The piezoelectricity ceramic piece takes the shape of a butterfly, that is, two ends of the piezoelectricity ceramic piece are broad, and the middle of the piezoelectricity ceramic piece shrinks inwards; the piezoelectricity ceramic loudspeaker comprises a front cover with sound holes formed in the middle, a vibration sound production component formed by an elastic vibrating diaphragm or an organic vibrating diaphragm, a metal diaphragm frame or a metal vibrating diaphragm, a piezoelectricity ceramic piece or the like is fixedly arranged in the front cover; a rear cover is fixedly connected with the front cover; the extraction electrode of the piezoelectricity ceramic piece is led out of the rear cover by a flexible printed circuit board to serve as the electric signal end of the piezoelectricity ceramic loudspeaker. The invention has the advantages that the low-frequency characteristic and the intermediate frequency tone of the butterfly-shaped piezoelectricity ceramic piece are good; and besides, the low-frequency characteristic of the piezoelectricity ceramic loudspeaker adopting the butterfly-shaped piezoelectricity ceramic piece, an obvious mid-frequency valley does not exist, the sound quality of a mid-frequency belt is good, and the distortion is less.

Description

technical field [0001] The invention relates to a piezoelectric ceramic sheet and a piezoelectric ceramic loudspeaker prepared therefrom. Background technique [0002] Currently commonly used piezoelectric ceramics—including single crystal and twin crystal piezoelectric ceramics—are rectangular or circular in shape, and the low-frequency characteristics of piezoelectric ceramics in this shape are poor, usually not lower than 700HZ; The sound quality is poor and the distortion is large between 5KHZ and 6KHZ in the middle frequency band; the piezoelectric ceramic speaker made of the piezoelectric ceramic sheet of the above shape has a poor bass reproduction effect in the low frequency band; in the middle frequency band, due to the phase cancellation of the sound radiation in space, It will form an obvious deep valley-commonly known as the mid-frequency valley, resulting in large distortion and poor sound quality. Contents of the invention [0003] One object of the present ...

Claims

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Application Information

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IPC IPC(8): H04R7/10H04R17/00
Inventor 贾开成贾军壮张惠
Owner ZHANGJIAGANG YUTONG ELECTRONICS TECH
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