CN201150129Y - Multilayer piezoelectric loudspeaker - Google Patents
Multilayer piezoelectric loudspeaker Download PDFInfo
- Publication number
- CN201150129Y CN201150129Y CNU2007203113257U CN200720311325U CN201150129Y CN 201150129 Y CN201150129 Y CN 201150129Y CN U2007203113257 U CNU2007203113257 U CN U2007203113257U CN 200720311325 U CN200720311325 U CN 200720311325U CN 201150129 Y CN201150129 Y CN 201150129Y
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- oscillating plate
- piezoelectric
- multilayer piezoelectric
- vibrating plate
- electrode
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Abstract
The utility model provides a multi-layer piezoelectric loudspeaker, which comprises an outer frame, a metal vibrating plate and a piezoelectric component. The piezoelectric component adopts an inter-digital structure, which is spliced on one surface or two surfaces of the metal vibrating plate, the thickness is less than 200micron, the metal vibrating plate adopts a hollow structure, a central vibrating plate is connected with an outer frame through more than two arm hanging structures, the length of the arm is not less than 1mm, the width of the arm is more than 1mm, and the minimum size of the metal vibrating plate is 10*10mm. The multi-layer piezoelectric loudspeaker simultaneously improves the structure of the metal vibrating plate, and reduces the influence on the properties of the acoustic pressure and the frequency response of the loudspeaker due to the changing of the metal vibrating plate through improving the motive force of the piezoelectric component.
Description
Technical field
The utility model relates to small-sized stereo set piezoelectric speaker.
Background technology
Piezoelectric speaker is a kind ofly to realize the electro-acoustic element of electric energy and mechanical energy conversion by inverse piezoelectric effect, and the audio amplifier of extensive use and mini-plant is exported.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 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 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, 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 metal oscillating plate size minimum is 10 * 10mm.
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.
Embodiment
The utility model has three kinds of execution modes, 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 piezoelectric speaker oscillating plate 4 size minimums are 10 * 10mm.
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.
Claims (7)
1, a kind of 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, and the center oscillating plate is connected with housing (1) with upper cantilever (2) by 2.
2, 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.
3, multilayer piezoelectric speaker as claimed in claim 2 is characterized in that described piezoelectric element comprises at least 3 layers piezoelectric layer.
4, multilayer piezoelectric speaker as claimed in claim 2 is characterized in that 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, mutual insulating between the electrode.
5, multilayer piezoelectric speaker as claimed in claim 1 is characterized in that described metal oscillating plate (4) size minimum is 10 * 10mm.
6, 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).
7, 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203113257U CN201150129Y (en) | 2007-12-20 | 2007-12-20 | Multilayer piezoelectric loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203113257U CN201150129Y (en) | 2007-12-20 | 2007-12-20 | Multilayer piezoelectric loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201150129Y true CN201150129Y (en) | 2008-11-12 |
Family
ID=40117900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203113257U Expired - Fee Related CN201150129Y (en) | 2007-12-20 | 2007-12-20 | Multilayer piezoelectric loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201150129Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103200507A (en) * | 2012-01-10 | 2013-07-10 | 肇庆捷成电子科技有限公司 | Manufacturing method of multi-layer piezoelectric loudspeaker oscillator and multi-layer piezoelectric loudspeaker oscillator |
| US11799395B2 (en) | 2019-09-27 | 2023-10-24 | Asustek Computer Inc. | Actuator |
-
2007
- 2007-12-20 CN CNU2007203113257U patent/CN201150129Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103200507A (en) * | 2012-01-10 | 2013-07-10 | 肇庆捷成电子科技有限公司 | Manufacturing method of multi-layer piezoelectric loudspeaker oscillator and multi-layer piezoelectric loudspeaker oscillator |
| US11799395B2 (en) | 2019-09-27 | 2023-10-24 | Asustek Computer Inc. | Actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20121220 |