CN201270584Y - Composite piezoelectric loudspeaker - Google Patents
Composite piezoelectric loudspeaker Download PDFInfo
- Publication number
- CN201270584Y CN201270584Y CNU2008202219140U CN200820221914U CN201270584Y CN 201270584 Y CN201270584 Y CN 201270584Y CN U2008202219140 U CNU2008202219140 U CN U2008202219140U CN 200820221914 U CN200820221914 U CN 200820221914U CN 201270584 Y CN201270584 Y CN 201270584Y
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- CN
- China
- Prior art keywords
- piezoelectric
- loud speaker
- piezoelectric ceramic
- loudspeaker
- multilayer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model provides a compound piezoelectric loudspeaker, which is composed of a piezoelectric piece which is manufactured by the multilayer piezoelectric ceramic co-firing technique and a single layer piezoelectric ceramic piece which are compounded, wherein an inter-digital structure is adopted, the thickness is smaller than 300 micrometers, and the piezoelectric piece and the ceramic piece are respectively pasted on two sides of a metal vibrating board to form a loudspeaker sounding and vibrating structure. Wherein the shape of the multilayer piezoelectric ceramic piece is square and the shape of the single layer piezoelectric ceramic piece can be rectangular, round or elliptic. The compound piezoelectric loudspeaker lowers the influence of the metal diaphragm of the piezoelectric loudspeaker on the characteristics of sound pressure, frequency response and the like of the loudspeaker through improving the driving force of piezoelectric elements and improving the structure of metal diaphragm simultaneously.
Description
Technical field
The utility model relates to the piezoelectric speaker of small-sized stereo set etc.
Background technology
Piezoelectric speaker is a kind ofly to realize the electro-acoustic element of electric energy and mechanical energy conversion being widely used in the sound equipment output of mini-plant by inverse piezoelectric effect.General piezoelectric speaker adopts the metal oscillating plate to attach the piezoelectric element structure, forms flexural vibrations under the audio-frequency electric field excitation, thereby realizes the output of sound.
Here, the flexural vibrations of piezoelectric speaker are to be out of shape by the excitation of piezoelectric element to promote, the mechanical resistance that the rigidity of metal vibrating diaphragm, thickness form piezoelectric element will cause the acoustic pressure of piezoelectric speaker to reduce, frequency response improves, the flatness variation of sound, therefore, most of piezoelectric speaker is only as high pitch compensation application.
Summary of the invention
The purpose of this utility model provides a kind of composite piezoelectric loud speaker, by improving the motive force of piezoelectric element, improves the structure of metal vibrating diaphragm simultaneously, reduces the influence of piezoelectric speaker metal vibrating diaphragm variation to characteristics such as loud speaker acoustic pressure, frequency responses.
For achieving the above object, the technical solution of the utility model is a kind of composite piezoelectric loud speaker, it is characterized in that piezoelectric patches and the individual layer piezoelectric ceramic piece made by the common burning technology of multilayer piezoelectric ceramic are compound, adopt interdigital structure, thickness is less than 300 microns, and the two sides that is adhered to the metal oscillating plate respectively forms loud speaker pronunciation vibrational structure.
The every layer thickness of piezoelectric speaker potsherd is less than 50 microns, and interior electrode adopts the Ag/Pd electrode material, and external electrode adopts Ag or the printing of Ag/Pd material is made and external electrode designs in one plane, takes insulation structure between the electrode.
Wherein the multilayer piezoelectric ceramic plate shape is a rectangle.
Wherein individual layer piezoelectric ceramic plate shape can be a square, circular or oval.The utlity model has following feature:
1. adopt multi-layer ceramics burning technology altogether, realize the parallel connection of multilayer piezoelectric speaker on electricity, and the series connection on the mechanics, the motive force of raising piezoelectric element.
2. adopt the advanced ceramics manufacturing technology, the piezoelectric constant of raising piezoceramic material, plane mechanical couplings coefficient, the impedance of reduction piezoelectric element etc., the motive force of raising piezoelectric element.
3. the metal vibrating diaphragm adopts suspended structure, and cantilever mechanism helps improving the loudspeaker vibration mechanical resistance, improves acoustic pressure output, improves the loud speaker frequency characteristic, improves the flatness of sound.
4. adopt multilayer-individual layer piezoelectric ceramic piece compound sticking technology, the piezoelectric constant of raising piezoelectric element, capacitance, plane mechanical couplings coefficient, the impedance of reduction piezoelectric element etc., the motive force of raising piezoelectric element.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a metal vibration board structure schematic diagram.
Fig. 3 is the local enlarged diagram of Fig. 2.
Embodiment
As shown in Figure 1, the piezoelectric patches that the utility model is made by the common burning technology of multilayer piezoelectric ceramic is that multilayer piezoelectric ceramic sheet 1 is compound with individual layer piezoelectric ceramic piece 3, adopt interdigital structure, thickness is less than 300 microns, and the two sides that is adhered to metal oscillating plate 2 respectively forms loud speaker pronunciation vibrational structure.
Above-mentioned metal vibrating reed has adopted soft border structure.Above-mentioned soft border structure is taked compound suspension damping structure, and its material can be formations such as organic film, macromolecule resin material.
As depicted in figs. 1 and 2, above-mentioned metal oscillating plate 2 is taked engraved structure, to improve the frequency characteristic harmony sound flatness of loud speaker.Its center oscillating plate is connected with housing by two above cantilever designs 4, and jib-length is not less than 1mm, the wide 1mm that is not more than of arm.Metal oscillating plate 2 size minimums are 10 * 10mm.
Multilayer piezoelectric ceramic sheet 1 every layer thickness is less than 50 microns, and interior electrode adopts the Ag/Pd electrode material, and external electrode adopts Ag or the printing of Ag/Pd material is made and external electrode designs in one plane, takes insulation structure between the electrode.
Wherein the multilayer piezoelectric ceramic plate shape is a rectangle, and individual layer piezoelectric ceramic plate shape can be a square, circular or oval.Just can be combined into three kinds of different shapes by the compound loud speaker of multilayer-single-layer ceramic like this, to adapt to different needs.
Claims (5)
1, a kind of composite piezoelectric loud speaker, it is characterized in that by multilayer piezoelectric ceramic sheet (1) and individual layer piezoelectric ceramic piece (3) compound, adopt interdigital structure, thickness is less than 300 microns, and the two sides that is adhered to metal oscillating plate (2) respectively forms loud speaker pronunciation vibrational structure.
2, composite piezoelectric loud speaker as claimed in claim 1 is characterized in that metal oscillating plate (2) takes engraved structure, and its center oscillating plate is connected with housing by two above cantilever designs (4), and jib-length is not less than 1mm, the wide 1mm that is not more than of arm.
3, composite piezoelectric loud speaker as claimed in claim 1, it is characterized in that the every layer thickness of multilayer piezoelectric ceramic sheet (1) is less than 50 microns, interior electrode adopts the Ag/Pd electrode material, external electrode adopts Ag or the printing of Ag/Pd material is made and external electrode designs in one plane, takes insulation structure between the electrode.
4, composite piezoelectric loud speaker as claimed in claim 1 is characterized in that multilayer piezoelectric ceramic sheet (1) shape is a rectangle.
5, composite piezoelectric loud speaker as claimed in claim 1 is characterized in that individual layer piezoelectric ceramic piece (3) shape is a square, circular or oval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202219140U CN201270584Y (en) | 2008-10-21 | 2008-10-21 | Composite piezoelectric loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202219140U CN201270584Y (en) | 2008-10-21 | 2008-10-21 | Composite piezoelectric loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201270584Y true CN201270584Y (en) | 2009-07-08 |
Family
ID=40843193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202219140U Expired - Fee Related CN201270584Y (en) | 2008-10-21 | 2008-10-21 | Composite piezoelectric loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201270584Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439411A (en) * | 2013-09-10 | 2013-12-11 | 武汉乾岩工程技术有限公司 | Multi-cross-hole ultrasonic detection system and detection method thereof |
| CN103916800A (en) * | 2014-04-03 | 2014-07-09 | 美特科技(苏州)有限公司 | Composite vibration film |
| CN107770338A (en) * | 2017-12-11 | 2018-03-06 | 苏州市职业大学 | A kind of self-powered incoming call prompting handset mounting |
-
2008
- 2008-10-21 CN CNU2008202219140U patent/CN201270584Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439411A (en) * | 2013-09-10 | 2013-12-11 | 武汉乾岩工程技术有限公司 | Multi-cross-hole ultrasonic detection system and detection method thereof |
| CN103439411B (en) * | 2013-09-10 | 2016-05-25 | 武汉乾岩工程技术有限公司 | Multispan hole ultrasonic wave detecting system and detection method thereof |
| CN103916800A (en) * | 2014-04-03 | 2014-07-09 | 美特科技(苏州)有限公司 | Composite vibration film |
| CN107770338A (en) * | 2017-12-11 | 2018-03-06 | 苏州市职业大学 | A kind of self-powered incoming call prompting handset mounting |
| CN107770338B (en) * | 2017-12-11 | 2023-12-08 | 苏州市职业大学 | Self-powered incoming call prompting mobile phone frame |
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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 |
Granted publication date: 20090708 Termination date: 20161021 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |