CN201248132Y - Multilayer piezoelectric loudspeaker for mobile communication - Google Patents
Multilayer piezoelectric loudspeaker for mobile communication Download PDFInfo
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- CN201248132Y CN201248132Y CNU2008200301935U CN200820030193U CN201248132Y CN 201248132 Y CN201248132 Y CN 201248132Y CN U2008200301935 U CNU2008200301935 U CN U2008200301935U CN 200820030193 U CN200820030193 U CN 200820030193U CN 201248132 Y CN201248132 Y CN 201248132Y
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- oscillating plate
- mobile communication
- multilayer piezoelectric
- piezoelectric speaker
- metal oscillating
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Abstract
The utility model provides a mobile communication multiplayer piezoelectricity loudspeaker which comprises an outer frame, a method vibrating board, an FPC and a piezoelectricity element, wherein the piezoelectricity element adopts an interdigital structure which is adhered to one side or two sides of the metal vibrating board, the thickness of the interdigital structure is smaller than 200 microns, the metal vibrating board adopts a hollowed-out structure, a central vibrating board is formed in the way that over two cantalever structures are connected with the outer frame, the length of the cantalever is not smaller than 1 mm, and the width of the cantalever is not larger than 1 mm. The utility model improves the structure of the metal vibrating board, and reduces the influence of the changes of metal vibrating board of the piezoelectricity loudspeaker on the characteristics of sound pressure, frequency response and the like of the loudspeaker by improving the driving force of the piezoelectricity element.
Description
Technical field
The utility model relates to the audio amplifier output piezoelectric speaker of mobile communication with piezoelectric speaker and mini-plant.
Background technology
The mobile communication piezoelectric speaker is a kind ofly to realize the electro-acoustic element of electric energy and mechanical energy conversion being widely used in the audio amplifier output of mobile communication and 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, and the mechanical resistance that the rigidity of metal oscillating plate, thickness form piezoelectric element will cause the sound of piezoelectric speaker to reduce, and frequency response improves, the flatness variation of sound.Therefore, most of piezoelectric speaker is only as the high pitch compensating action.
Summary of the invention
The purpose of this utility model provides a kind of mobile communication multilayer piezoelectric speaker, by improving the motive force of piezoelectric element, improves the structure of metal oscillating plate simultaneously, reduces the influence of piezoelectric speaker metal vibrating diaphragm variation to characteristics such as loud speaker acoustic pressure, frequency responses.
The technical solution of the utility model is a kind of mobile communication multilayer piezoelectric speaker, comprise housing, metal oscillating plate, piezoelectric element, described piezoelectric element adopts interdigital structure, be adhered to the one or both sides of metal oscillating plate, thickness is less than 200 microns, the metal oscillating plate is taked engraved structure, the center oscillating plate is connected with housing by 2 above cantilever designs, jib-length is not less than 1mm, the wide 1mm that is not more than of arm is welded with the flexible PCB wiring board and links to each other with the both positive and negative polarity solder joint on piezoelectric element.
The lit-par-lit structure of described piezoelectric element has been alternately stacked a plurality of piezoelectric layers and electrode layer, every layer thickness is less than 50 microns.
Described piezoelectric element comprises at least 3 layers piezoelectric layer.
The interior electrode of described electrode layer adopts the Ag/Pd electrode material, and external electrode adopts Ag or the printing of Ag/Pd material to make, and external electrode designs in one plane, takes insulation structure between the electrode.
Described square-shaped metal oscillating plate size minimum is 10 * 10mm
Described rectangle metal oscillating plate size minimum is 10 * 15mm.
Paste or the coating film organic material at the whole back side or the part back side at described metal oscillating plate.
The utlity model has following advantage
1, adopts multi-layer ceramics burning technology altogether, realize that multilayer piezoelectric speaker in parallel connection on the electricity and the series connection on the mechanics, improves the motive force of piezoelectric element.
2, adopt the advanced ceramics manufacturing technology, improve the piezoelectric constant of piezoceramic material, plane mechanical couplings coefficient reduces piezoelectric element impedance etc., improves the motive force of piezoelectric element.
3, the metal oscillating plate adopts suspended structure, and hitch helps improving the loudspeaker vibration mechanical resistance, improves the output of boosting, and improves the loud speaker frequency characteristic, improves the flatness of sound.
Description of drawings
Fig. 1 is one of a utility model execution mode structural representation.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 is two structural representations of the utility model execution mode.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Fig. 5 is three structural representations of the utility model execution mode.
Fig. 6 is the partial enlarged drawing of Fig. 5.
Fig. 7 is the A-A cutaway view one of three kinds of embodiment of the utility model.
Fig. 8 is the A-A cutaway view two of three kinds of embodiment of the utility model.
Fig. 9 is a square front view of the present utility model.
Figure 10 is a rectangle front view of the present utility model.
Embodiment
Profile of the present utility model has two kinds: square and rectangle, as Fig. 9 and shown in Figure 10, two kinds of shapes are structurally identical.Every kind of shape has three kinds of execution modes respectively, structure is respectively as Fig. 1, Fig. 3 and shown in Figure 5, be total to the piezoelectric element that burning technology is made by multilayer piezoelectric ceramic, internal electrode adopts interdigital structure, thickness is less than 200 microns, and the one or both sides that are adhered to metal oscillating plate 4 form loud speaker pronunciation vibrational structure.There is thin layer organic coating 5 to be connected between metal oscillating plate 4 and the housing 1, its material can be an organic film, macromolecule resin etc., metal oscillating plate 4 is taked engraved structure, and the utility model has been enumerated three kinds of engraved structures altogether, but content of the present utility model is not limited thereto, shown in Fig. 2, Fig. 4 and Fig. 6 dash area, to improve the frequency characteristic harmony sound flatness of loud speaker, its center oscillating plate is connected with housing 1 by 4 cantilevers 2, jib-length is not less than 1mm, the wide 1mm that is not more than of arm.Above-mentioned square piezoelectric speaker oscillating plate 4 size minimums are 10 * 10mm, and rectangle piezoelectric speaker oscillating plate 4 size minimums are 10 * 15mm.
Above-mentioned piezoelectric speaker potsherd 3 is to adopt technologies such as curtain coating, superimposition printing, common burning to make, and every layer thickness is less than 50 microns, and interior electrode adopts the Ag/Pd electrode material; External electrode adopts Ag or the printing of Ag/Pd material to make; The external electrode design is in one plane taked insulation structure between the electrode; Paste or coating film organic coating 5 at the whole back side or the part back side at described metal oscillating plate 4, as shown in Figure 7 and Figure 8.
As Fig. 9 and shown in Figure 10, on piezoelectric element, be welded with flexible PCB wiring board 6 and link to each other with the both positive and negative polarity solder joint, after adopting the continuous both positive and negative polarity solder joint of flexible PCB circuit, solved that consistency is poor, mechanical stress is difficult to control etc., help improving the loudspeaker vibration mechanical resistance, improve the output of boosting, improve the loud speaker frequency characteristic, improve the flatness of sound.
Claims (8)
1, a kind of mobile communication multilayer piezoelectric speaker, comprise housing (1), metal oscillating plate (4), piezoelectric element, it is characterized in that described piezoelectric element adopts interdigital structure, be adhered to the one or both sides of metal oscillating plate (4), thickness is less than 200 microns, metal oscillating plate (4) is taked engraved structure, the center oscillating plate is connected with housing (1) with upper cantilever (2) by 2, jib-length is not less than 1mm, the wide 1mm that is not more than of arm is welded with flexible PCD wiring board (6) and links to each other with the both positive and negative polarity solder joint on piezoelectric element.
2, mobile communication multilayer piezoelectric speaker as claimed in claim 1, the lit-par-lit structure of it is characterized in that described piezoelectric element has been alternately stacked a plurality of piezoelectric layers and electrode layer, every layer thickness is less than 50 microns.
3, mobile communication multilayer piezoelectric speaker as claimed in claim 2 is characterized in that described piezoelectric element comprises at least 3 layers piezoelectric layer.
4, mobile communication multilayer piezoelectric speaker as claimed in claim 2, the interior electrode that it is characterized in that described electrode layer adopts the Ag/Pd electrode material, external electrode adopts Ag or the printing of Ag/Pd material to make, and external electrode designs in one plane, mutual insulating between the electrode.
5, mobile communication multilayer piezoelectric speaker as claimed in claim 1 is characterized in that pasting or coating film organic coating (5) at the whole back side of described metal oscillating plate (4).
6, mobile communication multilayer piezoelectric speaker as claimed in claim 1 is characterized in that pasting or coating film organic coating (5) at the back portion of described metal oscillating plate (4).
7, mobile communication multilayer piezoelectric speaker as claimed in claim 1 is characterized in that described metal oscillating plate (4) is a square, and metal oscillating plate (4) size minimum is 10 * 10mm.
8, mobile communication multilayer piezoelectric speaker as claimed in claim is characterized in that described metal oscillating plate (4) is a rectangle, and metal oscillating plate (4) size minimum is 10 * 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200301935U CN201248132Y (en) | 2008-09-05 | 2008-09-05 | Multilayer piezoelectric loudspeaker for mobile communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200301935U CN201248132Y (en) | 2008-09-05 | 2008-09-05 | Multilayer piezoelectric loudspeaker for mobile communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201248132Y true CN201248132Y (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200301935U Expired - Fee Related CN201248132Y (en) | 2008-09-05 | 2008-09-05 | Multilayer piezoelectric loudspeaker for mobile communication |
Country Status (1)
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| CN (1) | CN201248132Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011006277A1 (en) * | 2009-07-14 | 2011-01-20 | 清华大学 | Piezoelectric speaker adopting interdigital or spiral electrode |
| CN102098612A (en) * | 2011-03-25 | 2011-06-15 | 西安康弘新材料科技有限公司 | Branched driven ultrathin multi-layer piezoelectric loudspeaker |
| CN101877810B (en) * | 2009-07-15 | 2013-02-27 | 清华大学 | Piezoelectric loudspeaker adopting interdigital electrodes or spiral electrodes |
| CN105142075A (en) * | 2015-09-21 | 2015-12-09 | 广东奥迪威传感科技股份有限公司 | Active sounder |
-
2008
- 2008-09-05 CN CNU2008200301935U patent/CN201248132Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011006277A1 (en) * | 2009-07-14 | 2011-01-20 | 清华大学 | Piezoelectric speaker adopting interdigital or spiral electrode |
| CN101877810B (en) * | 2009-07-15 | 2013-02-27 | 清华大学 | Piezoelectric loudspeaker adopting interdigital electrodes or spiral electrodes |
| CN102098612A (en) * | 2011-03-25 | 2011-06-15 | 西安康弘新材料科技有限公司 | Branched driven ultrathin multi-layer piezoelectric loudspeaker |
| CN105142075A (en) * | 2015-09-21 | 2015-12-09 | 广东奥迪威传感科技股份有限公司 | Active sounder |
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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: 20090527 Termination date: 20160905 |