CN201207727Y - Voice driving device using piezoelectric ceramics - Google Patents
Voice driving device using piezoelectric ceramics Download PDFInfo
- Publication number
- CN201207727Y CN201207727Y CNU2008200328209U CN200820032820U CN201207727Y CN 201207727 Y CN201207727 Y CN 201207727Y CN U2008200328209 U CNU2008200328209 U CN U2008200328209U CN 200820032820 U CN200820032820 U CN 200820032820U CN 201207727 Y CN201207727 Y CN 201207727Y
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- piezoelectric ceramic
- piezoelectric ceramics
- ceramic piece
- conductive fabric
- driving device
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Abstract
A piezoelectric ceramics voice drive device relates to an alarm sound element used in the fire fighting field, and comprises at least two layers of piezoelectric ceramics sheets with the radius no smaller than 15 mm and the width no bigger than 0.15 mm. The upper and bottom surfaces of each piezoelectric ceramics sheet are all provided with a conductive fabric, and the piezoelectric ceramics sheet is agglutinated with the conductive fabric by a glue layer. The device has the advantages of low frequency, large bandwidth and voice generating ability.
Description
Technical field
The utility model relates to the electric elements field, especially relates to a kind of microphone device that is used on the alarms such as fire-fighting.
Background technology
At present, great majority are reported to the police and are adopted metal to make substrate with microphone device, its frequency band is narrow, the frequency height, narrower, the single sound of frequency band (as a kind of shriek) can only be sent, and the voice device that bandwidth can send more note (as voice) can not be made, the fire protection warning device of some occasion such as communal facility etc., can only send simple warning at present and scream (note), how this tackles the sound of the suggestion language of emergency case can not to send reminds people; Also have and adopt piezoelectric ceramic to make the voice device, but the piezoelectric ceramic sounder spare of available technology adopting adopts the individual layer piezoelectric ceramic piece, and the diameter of potsherd is little, thickness is big, cause acoustic pressure not enough, the sound that sends is little, and the occasion that gives the alarm at need may can not play the warning effect to people because of sound is too little.
Summary of the invention
The purpose of this utility model is the above-mentioned shortcoming at prior art, provides a kind of and can send voice (more note) and the higher voltage current porcelain voice driving device of sound.
The technical scheme that realizes the utility model above-mentioned purpose is: voltage current porcelain voice driving device, has piezoelectric ceramic piece, described piezoelectric ceramic piece has at least two-layer, and the upper and lower surface of every lamination electroceramics sheet is provided with conductive fabric, and is bonding by glue layer between piezoelectric ceramic piece and conductive fabric.
Described piezoelectric ceramic piece is two-layer, and corresponding conductive fabric is three layers.
The radius of described piezoelectric ceramic piece is not less than 15mm, and thickness is not more than 0.15mm.
Formula: F
0=KD/R
2
F wherein
0: resonance frequency
K: fixed form constant (relevant) with material
R: the radius of vibrating reed
D: the thickness of vibrating reed
Can see that from above-mentioned formula thickness and radius have determined the resonance frequency of vibration, and resonance frequency is more little, the bandwidth of then pronouncing is big more, and then the pronunciation device note that can send is just many more.
And the utility model has adopted the piezoelectric ceramic piece of major diameter (being not less than 15mm), ultrathin (being not more than 0.15mm), make resonance frequency less than 1KHz, obtained good low-frequency effect, and adopt conductive fabric and piezoelectric ceramic piece to be flexible coupling, solved the narrow problem of frequency band, the employing multi-layer ceramics drives, and has then solved the low problem of acoustic pressure.
The utility model has the advantages that: compare with traditional piezoelectric ceramic sounder spare, it is low to have frequency, and bandwidth is big, can send out the characteristics of voice; Compare with other traditional phonetic alarms, have and avoid disturbing, the reliability height, adaptability is strong, and power consumption is little, the characteristics that cost is low.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Among the figure, 1 is conductive fabric, and 2 is glue layer, and 3 is piezoelectric ceramic piece.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model.
Voltage current porcelain voice driving device has two-layer piezoelectric ceramic piece 3, and the upper and lower surface of every lamination electroceramics sheet 3 is provided with conductive fabric 1, has three layers of conductive fabric 1, and 1 of piezoelectric ceramic piece 3 and conductive fabric are bonding by glue layer 3.The radius of piezoelectric ceramic piece is 15mm, and thickness is 0.15mm.
Claims (3)
1, voltage current porcelain voice driving device has piezoelectric ceramic piece, it is characterized in that: described piezoelectric ceramic piece has at least two-layer, and the upper and lower surface of every lamination electroceramics sheet is provided with conductive fabric, and is bonding by glue layer between piezoelectric ceramic piece and conductive fabric.
2, voltage current porcelain voice driving device according to claim 1 is characterized in that: described piezoelectric ceramic piece is two-layer, and corresponding conductive fabric is three layers.
3, voltage current porcelain voice driving device according to claim 1 and 2 is characterized in that: the radius of described piezoelectric ceramic piece is not less than 15mm, and thickness is not more than 0.15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200328209U CN201207727Y (en) | 2008-03-10 | 2008-03-10 | Voice driving device using piezoelectric ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200328209U CN201207727Y (en) | 2008-03-10 | 2008-03-10 | Voice driving device using piezoelectric ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201207727Y true CN201207727Y (en) | 2009-03-11 |
Family
ID=40466781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200328209U Expired - Fee Related CN201207727Y (en) | 2008-03-10 | 2008-03-10 | Voice driving device using piezoelectric ceramics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201207727Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182422A (en) * | 2018-11-13 | 2020-05-19 | 乐金显示有限公司 | Display device |
-
2008
- 2008-03-10 CN CNU2008200328209U patent/CN201207727Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182422A (en) * | 2018-11-13 | 2020-05-19 | 乐金显示有限公司 | Display device |
| US10972820B2 (en) | 2018-11-13 | 2021-04-06 | Lg Display Co., Ltd. | Display apparatus |
| CN113507674A (en) * | 2018-11-13 | 2021-10-15 | 乐金显示有限公司 | Sound generating device and apparatus |
| US11368771B2 (en) | 2018-11-13 | 2022-06-21 | Lg Display Co., Ltd. | Display apparatus |
| US11770645B2 (en) | 2018-11-13 | 2023-09-26 | Lg Display Co., Ltd. | Display apparatus |
| CN113507674B (en) * | 2018-11-13 | 2023-10-31 | 乐金显示有限公司 | Sound generating device and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 Termination date: 20160310 |