CN107564505A - A kind of piezoelectric vibration sounding module - Google Patents
A kind of piezoelectric vibration sounding module Download PDFInfo
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- CN107564505A CN107564505A CN201710765132.7A CN201710765132A CN107564505A CN 107564505 A CN107564505 A CN 107564505A CN 201710765132 A CN201710765132 A CN 201710765132A CN 107564505 A CN107564505 A CN 107564505A
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- piezoelectric patches
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Abstract
The present invention relates to a kind of piezoelectric vibration sounding module, the vibration sounding module includes base and cantilever beam, cantilever beam is fixed on base at least provided with a FX and by FX, FX on cantilever beam is fixing end, remaining free position is free end, vibration sounding module also includes being used for the hardening piezoelectric patches for changing vibration sounding module resonant frequency and the vibration piezoelectric patches for providing vibration, piezoelectric patches and vibration piezoelectric patches are hardened at least provided with one, hardening piezoelectric patches is arranged on cantilever beam fixing end and extended to free end, vibration piezoelectric patches is arranged on cantilever beam free end and extended to fixing end, spacing is left between hardening piezoelectric patches and vibration piezoelectric patches；The driving voltage of piezoelectric patches connection different frequency is hardened, changes the resonant frequency of whole module, vibration piezoelectric patches produces tactile vibrations or sends sound.Compared with prior art, the invention provides the piezoelectric device with complex function, device cost is both reduced, also saves volume.
Description
Technical field
The present invention relates to a kind of piezo electric module, more particularly, to a kind of piezoelectric vibration sounding module.
Background technology
In the case of piezoelectric element incoming transport signal, vibration can be produced.The signal of lower frequency (0~300Hz) can
To produce tactile vibrations, the signal of upper frequency (300Hz~20000Hz) produces audio frequency vibration.Therefore, piezoelectric element often by
It is used as the vibration source of touch feedback or loudspeaker.Piezoelectric element has vibration clearly as the vibration source of touch feedback
Advantage, at the same time, the vibration source as loudspeaker can not only provide high-quality high-frequency vibration signal, simultaneously because its is larger
Vibratory output and higher acoustic impedance, sound need not by sound hole just can light-transmitting panel, so can provide certain
Water resistance.The A of patent CN 103386397, which disclose a kind of piezo vibration module for providing touch feedback, to be shaken caused
Power is transferred directly to input equipment.The vibration module can provide the strong vibration force in below 300Hz, but in audio frequency
Vibrate faint.The A of patent CN 103581810 disclose a kind of band vibrating speaker.The loudspeaker provide vibration (300Hz with
Under) it is non-resonant vibration, therefore be only capable of providing faint touch feedback.Because touch feedback needs device to provide under resonant condition
Vibration, and audio frequency vibration needs that in the range of a frequency band stronger vibration can be provided, therefore same device is often
The touch feedback and audio output to work well can not be realized simultaneously.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of piezoelectric vibration sounding
Module.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of piezoelectric vibration sounding module, the vibration sounding module include base and cantilever beam, and described cantilever beam is set
On base, described cantilever beam is fixed on base at least provided with a FX and by described FX, is hanged
FX on arm beam is fixing end, and remaining free position is free end, and described vibration sounding module also includes being used to change
Become the hardening piezoelectric patches of vibration sounding module resonant frequency and the vibration piezoelectric patches for providing vibration, described hardening piezoelectricity
At least provided with one, described hardening piezoelectric patches is arranged on cantilever beam fixing end and from fixing end for piece and vibration piezoelectric patches
Top extends to free end, and described vibration piezoelectric patches is arranged on cantilever beam free end and prolonged from the end of free end to fixing end
Stretch, spacing is left between described hardening piezoelectric patches and vibration piezoelectric patches；
The driving voltage of described hardening piezoelectric patches connection different frequency, so as to change the resonance of piezoelectric vibration sounding module
Frequency, vibration piezoelectric patches produce tactile vibrations by corresponding resonance frequency or send sound.
Described base is provided with the boss for being used for that the FX of cantilever beam and base to be fixed, land length with
Cantilever beam FX equal length.
Described cantilever beam one end is provided with described FX, is described fixing end, the cantilever beam other end is institute
The free end stated；
Described boss sets one and is located at base one end, and described cantilever beam fixing end is fixed on described boss
On；
Described hardening piezoelectric patches sets one and is fixed on the fixing end of cantilever beam, and described hardening piezoelectric patches is by fixing
Hold to free end and extend, hardening piezoelectricity leaf length is more than the length of described boss；
Described vibration piezoelectric patches sets one and is fixed on the free end of cantilever beam, and described vibration piezoelectric patches is by freedom
The end at end extends to fixing end, and spacing is left between described hardening piezoelectric patches and vibration piezoelectric patches.
It is described FX in the middle part of described cantilever beam, cantilever beam FX both ends are two freedom of cantilever beam
End；
Described boss sets one and is located at the middle of the base；
Described hardening piezoelectric patches sets one and is fixed on the FX in the middle part of cantilever beam, described hardening piezoelectric patches
Cover FX and both ends exceed described boss to two free end extensions of cantilever beam, hardening piezoelectric patches edges at two ends respectively
Edge；
Described vibration piezoelectric patches sets two and is separately positioned on two free ends of cantilever beam, two vibration piezoelectric patches
FX extension in the middle part of respectively from from the end of free end to cantilever beam, two vibration piezoelectric patches and described hardening piezoelectricity
Spacing is left between piece.
Described cantilever beam both ends are respectively equipped with a FX, and then form two fixing ends, two fixing ends it
Between region for overarm arm free end；
Described boss sets two and is located at the both ends of base respectively, and the FX at cantilever beam both ends is separately fixed at
On two boss；
The both ends of cantilever beam are respectively provided with a hardening piezoelectric patches, and described hardening piezoelectric patches is arranged on the fixing end of cantilever beam
And extend to free end, hardening piezoelectricity leaf length is more than the length of corresponding boss, and described vibration piezoelectric patches is arranged on cantilever beam
Middle part and extend from the middle to both ends, described hardening piezoelectric patches and vibration piezoelectric patches between leave spacing.
Described cantilever beam includes any one in metal substrate, ceramic substrate, fibre base plate and composite base plate.
Described hardening piezoelectric patches or vibration piezoelectric patches includes single layer piezoelectric ceramics, multilayer piezoelectric ceramic, flexible piezoelectric material
Any one in material, composite piezoelectric material.
Compared with prior art, the invention has the advantages that：
(1) present invention by set it is at least one be used for change vibration sounding module resonant frequency hardening piezoelectric patches and
At least one vibration piezoelectric patches for being used to provide vibration, apply the driving voltage of different frequency, hardening pressure on hardening piezoelectric patches
Electric piece is upheld or shunk, and produces spring hardening effect, so as to change the resonant frequency of vibration sounding module, vibration module is in phase
Vibrated under the resonant frequency answered, so as to produce tactile vibrations or send sound, specifically：When hardening piezoelectric patches applies high frequency
During (1kHz-20kHz) sine voltage, cantilever beam and the rigidity of boss junction are larger, the resonant frequency of cantilever beam improve to
More than 300Hz, so as to which whole module produces audio frequency vibration, when hardening piezoelectric patches application low frequency (0-1kHz) sine voltage,
The resonant frequency of cantilever beam is down to below 300Hz, so as to which whole module produces tactile vibrations, there is provided have the pressure of complex function
Electrical part, device cost is both reduced, also save volume；
(2) concrete structure of piezoelectric vibration sounding module of the invention is various, need to only provide and be arranged on same cantilever beam
A pair of cooperatings hardening piezoelectric patches and vibration piezoelectric patches, can according to practical application request carry out reasonable disposition,
Have wide range of applications.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of piezoelectric vibration sounding module in embodiment 1；
Fig. 2 is the scheme of installation of cantilever beam and piezoelectric patches in embodiment 1；
Fig. 3 is the phantom of flexible electrode in embodiment 1；
Fig. 4 is the dimensional structure diagram of piezoelectric vibration sounding module in embodiment 2；
Fig. 5 is the scheme of installation of cantilever beam and piezoelectric patches in embodiment 2；
Fig. 6 is the dimensional structure diagram of piezoelectric vibration sounding module in embodiment 3；
Fig. 7 is the scheme of installation of cantilever beam and piezoelectric patches in embodiment 3.
In figure, 1 is vibration sounding module, and 111 be base, and 112 be boss, and 12 be cantilever beam, and 121 be substrate, and 122 be hard
Change piezoelectric patches, 123 be vibration piezoelectric patches, and 13 be flexible electrode, and 131 be the first circular copper electrode, and 132 be the second circular copper electricity
Pole, 133 be the 3rd circular copper electrode.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of piezoelectric vibration sounding module, the vibration sounding module 1 include base 111 and cantilever beam 12, and cantilever beam 12 is set
Put on base 111, cantilever beam 12 is at least provided with a FX and is fixed on by FX on base 111, cantilever
FX on beam 12 is fixing end, and remaining free position is free end, and vibration sounding module 1 also includes being used to change vibration
The hardening piezoelectric patches 122 of the resonant frequency of sounding module 1 and the vibration piezoelectric patches 123 for providing vibration, harden piezoelectric patches 122
With vibration piezoelectric patches 123 at least provided with one, hardening piezoelectric patches 122 is arranged on the fixing end of cantilever beam 12 and from fixing end
Top extends to free end, and vibration piezoelectric patches 123 is arranged on the free end of cantilever beam 12 and prolonged from the end of free end to fixing end
Stretch, harden and leave spacing between piezoelectric patches 122 and vibration piezoelectric patches 123；Harden the excitation electricity that piezoelectric patches 122 connects different frequency
Pressure, so as to change the resonant frequency of piezoelectric vibration sounding module 1, vibration piezoelectric patches 123 is produced by corresponding resonance frequency
Tactile vibrations send sound.Base 111 is provided with convex for the FX of cantilever beam 12 to be fixed with base 111
Platform 112, the length of boss 112 and the FX equal length of cantilever beam 12.Cantilever beam 12 is made up of a substrate 121, including metal
Any one in substrate, ceramic substrate, fibre base plate and composite base plate.Hardening piezoelectric patches 122 or vibration piezoelectric patches 123 include
Any one in single layer piezoelectric ceramics, multilayer piezoelectric ceramic, flexible piezoelectric material, composite piezoelectric material.
As shown in Figures 1 to 3, cantilever beam 12 sets one in the present embodiment, and the one end of cantilever beam 12 is provided with described fixed area
Domain, it is described fixing end, the other end of cantilever beam 12 is described free end, and cantilever beam 12 uses sheet metal, hardens piezoelectricity
Piece 122 and vibration piezoelectric patches 123 are using single layer piezoelectric ceramics；
Boss 112 sets one and is located at the one end of base 111, and the fixing end of cantilever beam 12 is fixed on boss 112；
Hardening piezoelectric patches 122 sets one to be simultaneously fixed on the fixing end of cantilever beam 12, hardening piezoelectric patches 122 from fixing end to
Free end extends, and hardening piezoelectric patches 122 length is more than the length of boss 112；
Vibration piezoelectric patches 123 sets one and is fixed on the free end of cantilever beam 12, and vibration piezoelectric patches 123 is by free end
End extends to fixing end, hardens and leaves spacing between piezoelectric patches 122 and vibration piezoelectric patches 123.
Cantilever beam 12 is fitted on the cantilever beam 12 of a metal and formed by hardening piezoelectric patches 122 and vibration piezoelectric patches 123,
Cantilever beam 12 is fixed on by way of being bonded or riveting on boss 112；Wherein close to the hardening piezoelectric patches 122 of boss 112
The free end of cantilever beam 12 is extended to from the edge of boss 112, and the length for hardening piezoelectric patches 122 exceedes the length of boss 112
Degree；Vibration piezoelectric patches 123 close to the free end of cantilever beam 12 extends since free end to boss 112, and hard with fixing end
Change piezoelectric patches 122 not to be in contact.Harden piezoelectric patches 122 and vibrate the width of piezoelectric patches 123 and the width one of cantilever beam 12
Cause, harden piezoelectric patches 122 and vibrate piezoelectric patches 123 with the ratio of the thickness of cantilever beam 12 10：1~1：Between 2.
Hardening piezoelectric patches 122 and vibration piezoelectric patches 123 are coated with metal electrode and pass through polarization process, and polarised direction
It is negative pole to be bonded the one side of cantilever beam 12, one side is positive pole in addition.The other piezoelectric vibration sounding module 1 is also soft including one
Property electrode 13, the flexible electrode 13 include respectively as hardening piezoelectric patches 122 and vibrate the positive pole exit of piezoelectric patches 123 first
Circular 131 and second circular copper electrode 132 of copper electrode, and the 3rd circular copper electrode 133 as earth terminal.Cantilever beam 12
Bottom surface is electrically connected by bonding mode with the 3rd circular copper electrode 133 of flexible electrode 13 and is used as earth terminal；Hardening
Piezoelectric patches 122 is electrically connected by way of bonding with the first circular copper electrode 131 of flexible electrode 13, and vibration piezoelectric patches 123 is logical
The mode for crossing bonding is connected with the second circular copper electrode 132 of flexible electrode 13.Flexible electrode 13 except three circular copper electrodes with
Outside, remaining position is insulated with hardening piezoelectric patches 122, vibration piezoelectric patches 123 and cantilever beam 12.
When hardening piezoelectric patches 122 is applied in high frequency (1kHz-20kHz) sine voltage, cantilever beam 12 and boss 112
The rigidity of junction is larger, and the resonant frequency of cantilever beam 12 is improved to more than 300Hz, so as to which whole module produces audio frequency vibration；
When hardening application low frequency (0-1kHz) sine voltage of piezoelectric patches 122, the resonant frequency of cantilever beam 12 is down to below 300Hz,
So as to which whole module produces tactile vibrations.By hardening piezoelectric patches 122 on apply different frequency voltage, reach adjustment pressure
The purpose of the frequency of use scope of electric oscillation sounding module 1.
Embodiment 2
As shown in Figures 4 and 5, the present embodiment difference from Example 1 is：Cantilever beam 12 sets one, cantilever beam 12
Middle part is FX, and the FX both ends of cantilever beam 12 are two free ends of cantilever beam 12；Boss 112 sets one and position
In the middle part of base 111；Hardening piezoelectric patches 122 sets one and is fixed on the FX at the middle part of cantilever beam 12, hardens piezoelectric patches
122 covering FX and both ends are respectively to the extension of 12 two free ends of cantilever beam, hardening piezoelectric patches 122 edges at two ends is beyond convex
The edge of platform 112；Vibration piezoelectric patches 123 sets two and is separately positioned on two free ends of cantilever beam 12, two vibration pressures
Electric piece 123 respectively from the end of free end to cantilever beam 12 middle part FX extension, two vibration piezoelectric patches 123 with it is hard
Spacing is left between change piezoelectric patches 122.Flexible electrode 13 sets four copper electrodes simultaneously, and one as hardening piezoelectric patches 122
With the common ground end (i.e. negative pole) of two vibration piezoelectric patches 123, other three respectively as hardening piezoelectric patches 122 and two
Vibrate the common ground end of piezoelectric patches 123.Remaining is same as Example 1.
Embodiment 3
As shown in Figures 6 and 7, the present embodiment difference from Example 1 is：Cantilever beam 12 sets one, cantilever beam 12
Both ends are respectively equipped with a FX, and then form two fixing ends, and region is oneself of overarm arm 12 between two fixing ends
By holding；Boss 112 sets two and is located at the both ends of base 111 respectively, and the fixing end at the both ends of cantilever beam 12 is separately fixed at two
On individual boss 112；The both ends of cantilever beam 12 are respectively provided with a hardening piezoelectric patches 122, and hardening piezoelectric patches 122 is arranged on cantilever beam 12
Fixing end simultaneously extends to free end, and hardening piezoelectric patches 122 length is more than the length of corresponding boss 112, and the middle part of cantilever beam 12 is set
A vibration piezoelectric patches 123 is put, vibration piezoelectric patches 123 extends from the middle part of cantilever beam 12 to both ends, hardens piezoelectric patches 122 and vibration
Spacing is left between piezoelectric patches 123.At the same time flexible electrode 13 as described in Example 1 is respectively provided with each cantilever beam 12.
Remaining is same as Example 1.
Claims (7)
1. a kind of piezoelectric vibration sounding module, the vibration sounding module (1) includes base (111) and cantilever beam (12), described
Cantilever beam (12) is arranged on base (111), it is characterised in that described cantilever beam (12) at least provided with a FX simultaneously
It is fixed on by described FX on base (111), the FX on cantilever beam (12) is fixing end, remaining freedom portion
Position is free end, and described vibration sounding module (1) also includes being used for the hardening pressure for changing vibration sounding module (1) resonant frequency
Electric piece (122) and the vibration piezoelectric patches (123) for providing vibration, described hardening piezoelectric patches (122) and vibration piezoelectric patches
(123) at least provided with one, described hardening piezoelectric patches (122) is arranged on cantilever beam (12) fixing end and from fixing end
Top extends to free end, and described vibration piezoelectric patches (123) is arranged on cantilever beam (12) free end and from the end of free end
Extend to fixing end, spacing is left between described hardening piezoelectric patches (122) and vibration piezoelectric patches (123)；
The driving voltage of described hardening piezoelectric patches (122) connection different frequency, so as to change piezoelectric vibration sounding module (1)
Resonant frequency, vibration piezoelectric patches (123) produce tactile vibrations by corresponding resonance frequency or send sound.
2. a kind of piezoelectric vibration sounding module according to claim 1, it is characterised in that set on described base (111)
There is the boss (112) for the FX of cantilever beam (12) and base (111) to be fixed, boss (112) length is with hanging
Arm beam (12) FX equal length.
A kind of 3. piezoelectric vibration sounding module according to claim 2, it is characterised in that described cantilever beam (12) one end
It is described fixing end, cantilever beam (12) other end is described free end provided with described FX；
Described boss (112) sets one and is located at base (111) one end, and described cantilever beam (12) fixing end is fixed on institute
On the boss (112) stated；
Described hardening piezoelectric patches (122) sets one and is fixed on the fixing end of cantilever beam (12), described hardening piezoelectric patches
(122) extended from fixing end to free end, hardening piezoelectric patches (122) length is more than the length of described boss (112)；
Described vibration piezoelectric patches (123) sets one and is fixed on the free end of cantilever beam (12), described vibration piezoelectric patches
(123) extended from the end of free end to fixing end, stayed between described hardening piezoelectric patches (122) and vibration piezoelectric patches (123)
There is spacing.
4. a kind of piezoelectric vibration sounding module according to claim 2, it is characterised in that in the middle part of described cantilever beam (12)
For described FX, cantilever beam (12) FX both ends are two free ends of cantilever beam (12)；
Described boss (112) sets one and in the middle part of base (111)；
Described hardening piezoelectric patches (122) sets one and the FX being fixed in the middle part of cantilever beam (12), described hardening
Piezoelectric patches (122) covers FX and both ends are respectively to (12) two free end extensions of cantilever beam, hardens piezoelectric patches (122) two
End margin exceeds the edge of described boss (112)；
Described vibration piezoelectric patches (123) sets two and is separately positioned on two free ends of cantilever beam (12), two vibrations
Piezoelectric patches (123) respectively from the end of free end to cantilever beam (12) in the middle part of FX extension, two vibration piezoelectric patches
(123) spacing is left between described hardening piezoelectric patches (122).
A kind of 5. piezoelectric vibration sounding module according to claim 1, it is characterised in that described cantilever beam (12) both ends
A FX is respectively equipped with, and then forms two fixing ends, region is the freedom of overarm arm (12) between two fixing ends
End；
Described boss (112) sets two and is located at the both ends of base (111), the FX at cantilever beam (12) both ends respectively
It is separately fixed on two boss (112)；
The both ends of cantilever beam (12) are respectively provided with a hardening piezoelectric patches (122), and described hardening piezoelectric patches (122) is arranged on cantilever
The fixing end of beam (12) simultaneously extends to free end, and hardening piezoelectric patches (122) length is more than the length of corresponding boss (112), described
Vibration piezoelectric patches (123) be arranged on the middle part of cantilever beam (12) and extend from the middle to both ends, described hardening piezoelectric patches
(122) spacing is left between vibration piezoelectric patches (123).
6. a kind of piezoelectric vibration sounding module according to claim 1, it is characterised in that described cantilever beam (12) includes
Any one in metal substrate, ceramic substrate, fibre base plate and composite base plate.
A kind of 7. piezoelectric vibration sounding module according to claim 1, it is characterised in that described hardening piezoelectric patches
(122) or vibration piezoelectric patches (123) includes single layer piezoelectric ceramics, multilayer piezoelectric ceramic, flexible piezoelectric material, composite piezoelectric material
In any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765132.7A CN107564505B (en) | 2017-08-30 | 2017-08-30 | Piezoelectric vibration sounding module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765132.7A CN107564505B (en) | 2017-08-30 | 2017-08-30 | Piezoelectric vibration sounding module |
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| CN107564505A true CN107564505A (en) | 2018-01-09 |
| CN107564505B CN107564505B (en) | 2020-10-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022104932A1 (en) * | 2020-11-19 | 2022-05-27 | 瑞声声学科技(深圳)有限公司 | Piezoelectric microphone |
| WO2023245806A1 (en) * | 2022-06-20 | 2023-12-28 | 瑞声开泰科技(武汉)有限公司 | Mems loudspeaker |
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| CN107564505B (en) | 2020-10-16 |
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