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Vibration device

一种振荡器、压电振动器的技术，应用在仪器、传感器、平面振膜等方向，能够解决减小厚度等问题

Inactive Publication Date: 2013-03-06
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in electroacoustic transducers, there is a limit to reducing the thickness because the magnetic circuit is composed of a large number of parts such as permanent magnets or voice coils

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Hereinafter, embodiments of the present invention will be described using the drawings. Also in all the drawings, the same components are denoted by the same reference numerals, and descriptions thereof will not be repeated.

[0022] figure 1 is a sectional view showing the oscillator 100 related to the first embodiment. The oscillator 100 includes a piezoelectric vibrator 10 , a vibration member 20 , a vibration member 25 , an elastic member 30 and a support member 35 . For example, the oscillator 100 is used as an oscillation source of a speaker or an acoustic wave sensor. In addition, the oscillator 100 can also be used as a temperature sensor by using the pyroelectric effect of a piezoelectric body. For example, in the case of using the oscillator 100 as a speaker, it can be used as a sound source of, for example, an electronic device (mobile phone, laptop computer, small game device, etc.).

[0023] The vibrating member 20 is larger than the piezoelectric vibra...

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PUM

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Abstract

Disclosed is a vibration device which is provided with: a piezoelectric vibrator (10); a vibration member (20), which is larger than the piezoelectric vibrator (10) in planar view, and which restricts one surface of the piezoelectric vibrator (10); a vibration member (25), which is larger than the piezoelectric vibrator (10) in planar view, and which restricts the other surface of the piezoelectric vibrator (10); an elastic member (30), which supports the edge of the vibration member (20) surface that restricts the piezoelectric vibrator (10), and which also supports the edge of the vibration member (25) surface that restricts the piezoelectric vibrator (10); and a supporting member (35), which is positioned on the circumference of the elastic member (30), and which supports the elastic member (30).

Description

technical field [0001] The present invention relates to an oscillator using a piezoelectric vibrator. Background technique [0002] As an electro-acoustic transducer for mobile devices and the like, there is an electro-dynamic electro-acoustic transducer. The electrodynamic electroacoustic transducer generates an oscillation amplitude by using the action of a magnetic circuit. However, in electrodynamic electroacoustic transducers, there is a limit to reducing the thickness because the magnetic circuit is composed of a large number of parts such as permanent magnets or voice coils. [0003] As an electroacoustic transducer used instead of an electrodynamic electroacoustic transducer, there is a piezoelectric type electroacoustic transducer. The piezoelectric type electroacoustic transducer generates an oscillation amplitude by using expansion and contraction motions generated by applying an electric field to a piezoelectric vibrator. Since the piezoelectric type electroac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R17/00G01H11/08H04R3/00
CPCG06F3/016H04R17/00B06B1/0648H04R2217/03H04R7/10H04R2499/11
Inventor 大西康晴黑田淳菰田元喜岸波雄一郎村田行雄佐藤重夫内川达也
Owner NEC CORP