CN107508498B - A kind of piezo vibration module - Google Patents
A kind of piezo vibration module Download PDFInfo
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- CN107508498B CN107508498B CN201710764284.5A CN201710764284A CN107508498B CN 107508498 B CN107508498 B CN 107508498B CN 201710764284 A CN201710764284 A CN 201710764284A CN 107508498 B CN107508498 B CN 107508498B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 230000010287 polarization Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 108091027981 Response element Proteins 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000010344 co-firing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The present invention relates to a kind of piezo vibration modules, the piezo electric module includes the piezoelectric element (1) of shell (3) and setting in shell (3), the piezoelectric element (1), the piezo vibration module further includes the displacement amplifying mechanism for amplifying piezoelectric element (1) deflection, the piezoelectric element (1) shell (3) described by displacement amplifying mechanism connection, the non-electrical pole-face connection of the piezoelectric element (1) two sides displacement amplifying mechanism.Compared with prior art, piezo vibration module of the present invention has many advantages, such as that response is fast, vibration force is big.
Description
Technical field
The present invention relates to piezoelectric vibration fields, more particularly, to a kind of piezo vibration module.
Background technique
Piezo vibration module can be used as the touch feedback vibration source of portable device, provide within the scope of 100~300Hz
Vibration.Piezo vibration module has the characteristics that response is fast, it is clear and abundant to provide for user compared with electromagnetic vibration module
Vibration.
The touch feedback of high-quality requires vibration source also to have big vibration force while responding fast.According to newton second
Law, vibration force are directly proportional to the acceleration of the quality of vibrating body and vibrating body.In the case where frequency is constant, the matter of vibrating body
The amplitude of amount and vibrating body determines the size of vibration force.Piezo vibration module mostly uses cantilever beam to drive metallic gauge block at present
Structure.This structure causes under the same volume, the gold of piezo vibration module to provide oscillation space to piezoelectric cantilever
Belonging to the long-pending oscillation space with metal block of block will be smaller than the volume of electromagnetic vibration module and oscillation space.Therefore, same
Under a frequency, the vibration force of the piezo vibration module of same volume size is less than the vibration force of electromagnetic vibration module.
Summary 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 piezo vibration modules.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of piezo vibration module, the piezo electric module include the piezoelectric element of shell and setting inside the shell, the pressure
Electrical component, the piezo vibration module further include the displacement amplifying mechanism for amplifying piezoelectric element deflection, the piezoelectricity
The component shell described by displacement amplifying mechanism connection, the non-electrical pole-face connection of the piezoelectric element two sides displacement
Enlarger.
The piezoelectric element is formed by connecting by multiple piezoelectric elements, and the piezoelectric element is equipped with two pairs and is oppositely arranged
Electrode surface and non-electrical pole-face, multiple piezoelectric elements are arranged successively and bond to form the piezoelectricity by the non-electrical pole-face
Component, the non-electrical pole-face connection of two piezoelectric element sides of the head and the tail displacement amplifying mechanism.
The piezoelectric element includes multi-layer piezoelectric sheet material, and metal inner electrode is equipped between adj acent piezoelectric sheet material, described
Piezoelectricity sheet material and metal inner electrode stack to form cube structure, and two opposite faces of the cube structure are respectively equipped with outer
Electrode surface described in electrode and then formation, the polarization direction of the piezoelectric element are parallel with the electrode surface.
The displacement amplifying mechanism includes two crank links, and the non-electrical pole-face of piezoelectric element two sides passes through one respectively
A crank link connection shell.
The crank link includes the first crank and the second crank, and the first described crank one end connects piezoelectric element
Non-electrical pole-face, the other end connects second crank one end, the second crank other end connection shell, second crank
It is not contacted with piezoelectric element.
The displacement amplifying mechanism includes annular enclosed type framework, and the piezoelectric element is placed in framework, piezoelectricity group
Part corner angle are contacted with framework, and there are gap, the non-electrical of the piezoelectric element two sides between remaining position of piezoelectric element and framework
Pole-face connects framework, the framework shell also described by supporting block connection by connecting rod respectively.
Compared with prior art, the present invention has the advantage that
(1) present invention is using piezoelectric element itself as the mass block of piezo vibration module, with existing piezo vibration module
Technical solution compares the space for saving mass block, has biggish vibration force under same volume, or in identical vibration force
Under conditions of have lesser volume；
(2) present invention is while obtaining biggish vibration force, since using piezoelectric element, response speed is wanted
Better than electromagnetic vibration module, therefore piezo vibration module of the invention integrates that response is fast, the big advantage of vibration force big two；
(3) polarization direction of piezoelectric element of the present invention is parallel with electrode surface, therefore the extraneous driving voltage of piezoelectric element is applied
The direction added is vertical with the polarization direction of piezoelectric element, and this structure cuts piezoelectric element under the action of external voltage
Shear deformation, without displacement amplifying mechanism, this structure is under identical size and form factor, and piezoelectric element is defeated
It is displaced maximum structure out, biggish displacement is exported while exporting biggish vibration force；
(4) displacement amplifying mechanism of the present invention uses crank structure, driving of the crank structure in piezoelectric element scissoring vibration
Under, the first crank rotates, this rotates the bending vibration for causing the second crank, so that piezoelectric element is generated relative to shell
It is several times as much as the up-down vibration of scissoring vibration displacement, which can be effectively by the displacement equations of piezoelectric element, with this
Meanwhile this is simple and reliable for structure；
(5) displacement amplifying mechanism of the present invention is using oval closed framework, and the closed framework of the ellipse is in piezoelectric element
It deforms under the action of four crest lines contacted with the framework, when the elongation of the long axis direction of the framework, short-axis direction shortens,
Vice versa, and the displacement of short axle deformation is the several times of long axis, achievees the purpose that displacement equations, the enlarger structure is tight
It gathers, so that piezo vibration module is in the case where providing same vibration force, small volume.
Detailed description of the invention
Fig. 1 is the top view of piezoelectric element in piezo vibration module of the present invention；
Fig. 2 is the piezoelectric element structural schematic diagram before the present invention is unpolarized；
Fig. 3 is the sectional view of piezoelectric element of the present invention；
Fig. 4 is the cross-sectional view of piezo vibration module in the embodiment of the present invention 1；
Fig. 5 is the top view of piezo vibration module in the embodiment of the present invention 2.
In figure, 1 is piezoelectric element, and 11 be piezoelectric element, and 111,112,113,114 and 115 be piezoelectricity sheet material, 121,122,
123 and 124 be metal inner electrode, 131 and 132 be external electrode, 141 and 142 be polarizing electrode, 21 and 22 be crank link, 3
It is framework for shell, 4,41 and 42 be connecting rod, and 43 and 44 be supporting block.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of piezo vibration module, the piezo electric module include shell 3 and the piezoelectric element 1 that is arranged in shell 3, piezoelectricity group
Part 1, the piezo vibration module further include the displacement amplifying mechanism for amplifying 1 deflection of piezoelectric element, and piezoelectric element 1 passes through
The non-electrical pole-face connection position of displacement amplifying mechanism connected with outer casing 3,1 two sides of piezoelectric element moves enlarger.
As shown in Figure 1, piezoelectric element 1 is formed by connecting by multiple piezoelectric elements 11, piezoelectric element 11 is equipped with two pairs relatively
The electrode surface and non-electrical pole-face of setting, multiple piezoelectric elements 11 are arranged successively and bond to form piezoelectric element 1 by non-electrical pole-face,
The non-electrical pole-face connection position of two 11 sides of piezoelectric element moves enlarger from beginning to end.
As shown in Figures 2 and 3, piezoelectric element 11 includes multi-layer piezoelectric sheet material, is equipped in metal between adj acent piezoelectric sheet material
Electrode, piezoelectricity sheet material and metal inner electrode stack to form cube structure, and two opposite faces of cube structure are respectively equipped with outer
Electrode 131 and 132, and then electrode surface is formed, the polarization direction of piezoelectric element 11 is parallel with electrode surface, therefore piezoelectric element 11
The direction that extraneous driving voltage applies is vertical with the polarization direction of piezoelectric element 11, and this structure makes piezoelectric element 11 in the external world
Occur shear-deformable under the action of voltage, without displacement amplifying mechanism, this structure is identical size and outer
Under the conditions of shape, the maximum structure of 11 output displacement of piezoelectric element, and then displacement amplifying mechanism exports biggish vibration to displacement equations
Power.
Fig. 2 shows unpolarized preceding 11 structural schematic diagram of piezoelectric element, pottery is made using co-firing technology in piezoelectric element 11
Porcelain stacks, and then, is covered with external electrode 131 and 132 in two exposed faces of the metal inner electrode of piezoelectric element 11, at the same time vertically
Polarizing electrode 141 and 142 is covered in two faces of external electrode 131 and 132 and metal inner electrode；Later, in 141 He of polarizing electrode
142 both ends apply the voltage of 1kV/mm-3kV/mm, kept for 1 minute or more, so that piezoelectric element 11 has piezoelectricity.Finally, with
The modes such as grinding, cutting remove polarizing electrode 141 and 142.
As shown in figure 3, piezoelectric element 11 is laminated electric sheet material using 5 in the present embodiment and 4 layers of metal inner electrode are alternately stacked；
External electrode 131 and 132 be coated in 11 two sides of piezoelectric element, wherein external electrode 131 connect with metal inner electrode 121 and 123 and with
Metal inner electrode 122 and 124 insulate, external electrode 132 connect with metal inner electrode 122 and 124 and with metal inner electrode 121 and
123 insulation.
As shown in figure 4, displacement amplifying mechanism include two crank links 21 and 22,1 two sides of piezoelectric element it is non-electrode
Face passes through a crank link connected with outer casing 3 respectively.Crank link 21 and 22 include the first crank and the second crank, first
Crank one end connects the non-electrical pole-face of piezoelectric element 1, and the other end connects second crank one end, the second crank other end connected with outer casing
3, the second crank is not contacted with piezoelectric element 1.Piezoelectric element 1 externally exports vibration as the quality system of entire piezo vibration module
Dynamic, the vibration of piezoelectric element 1 is amplified and is externally exported by displacement amplifying mechanism.The work of displacement amplifying mechanism is former in the present embodiment
Reason are as follows: under the driving of 11 scissoring vibration of piezoelectric element, the first crank rotates, this rotates the bending for causing the second crank
Vibration, so that piezoelectric element 11 generates the up-down vibration for being several times as much as scissoring vibration displacement relative to shell 3, thus displacement equations machine
Structure is effectively by the displacement equations of piezoelectric element, and at the same time, this is simple and reliable for structure.
Embodiment 2
This embodiment differs from embodiment 1 in that the specific structure of displacement amplifying mechanism, remaining with 1 phase of embodiment
Together.Specifically:
As shown in figure 5, displacement amplifying mechanism includes annular enclosed type framework 4 in the present embodiment, piezoelectric element 1 is placed in framework
In 4,1 corner angle of piezoelectric element are contacted with framework 4, there are gap between remaining position of piezoelectric element 1 and framework 4,1 liang of piezoelectric element
The non-electrical pole-face of side passes through connecting rod 41 and 42 respectively and connects framework 4, and framework 4 also passes through the connected with outer casing of supporting block 43 and 44 3.This
Annular enclosed type framework 4 is oval structure in embodiment.The scissoring vibration of piezoelectric element 1 is converted width by displacement amplifying mechanism
The vibration in direction, piezoelectric element 1 externally export vibration as the quality system of module.The work of enlarger is moved in the present embodiment
Principle are as follows: the annular enclosed type framework 4 of oval structure is under the action of four crest lines of piezoelectric element 11 contacted with the framework 4
It deforms, when the elongation of the long axis direction of the framework 11, short-axis direction shortens, and vice versa, and the displacement of short axle deformation
It is the several times of long axis, achievees the purpose that displacement equations, wherein long axis refers to the non-electrical pole-face of 11 two sides of piezoelectric element in framework 4
Horizontal axis where connecting rod 41 and 42, short axle are the axis vertical with long axis.The displacement amplifying mechanism is compact-sized, so that
Piezo vibration module is in the case where providing same vibration force, small volume.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (5)
1. a kind of piezo vibration module, which includes the piezoelectric element (1) of shell (3) and setting in shell (3), institute
The piezoelectric element (1) stated, which is characterized in that the piezo vibration module further includes for amplifying piezoelectric element (1) deflection
Displacement amplifying mechanism, the piezoelectric element (1) shell (3) described by displacement amplifying mechanism connection, the piezoelectricity group
The non-electrical pole-face connection of part (1) two sides displacement amplifying mechanism, the piezoelectric element (1) is by multiple piezoelectric elements (11)
It is formed by connecting, the piezoelectric element (11) is equipped with the electrode surface and non-electrical pole-face that two pairs are oppositely arranged, multiple piezoelectric elements
(11) it is arranged successively and bonds to form the piezoelectric element (1) by the non-electrical pole-face, two piezoelectric elements of head and the tail
(11) the non-electrical pole-face connection of the side displacement amplifying mechanism.
2. a kind of piezo vibration module according to claim 1, which is characterized in that the piezoelectric element (11) includes more
It is laminated electric sheet material, is equipped with metal inner electrode between adj acent piezoelectric sheet material, the piezoelectricity sheet material and metal inner electrode stack to be formed
Cube structure, two opposite faces of the cube structure are respectively equipped with described in external electrode (131,132) and then formation
The polarization direction of electrode surface, the piezoelectric element (11) is parallel with the electrode surface.
3. a kind of piezo vibration module according to claim 1, which is characterized in that the displacement amplifying mechanism includes two
A crank link (21,22), the non-electrical pole-face of piezoelectric element (1) two sides pass through a crank link (21,22) even respectively
Connect the shell (3).
4. a kind of piezo vibration module according to claim 3, which is characterized in that the crank link (21,22)
Including the first crank and the second crank, the non-electrical pole-face of first crank one end connection piezoelectric element (1), other end connection
Second crank one end, the second crank other end connection shell (3), second crank do not connect with piezoelectric element (1)
Touching.
5. a kind of piezo vibration module according to claim 1, which is characterized in that the displacement amplifying mechanism includes ring
Shape closed formula framework (4), the piezoelectric element (1) are placed in framework (4), and piezoelectric element (1) corner angle are contacted with framework (4),
There are gap between piezoelectric element (1) remaining position and framework (4), the non-electrical pole-face of the piezoelectric element (1) two sides is distinguished
Framework (4) are connected by connecting rod (41,42), the framework (4) shell also described by supporting block (43,44) connection
(3)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764284.5A CN107508498B (en) | 2017-08-30 | 2017-08-30 | A kind of piezo vibration module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764284.5A CN107508498B (en) | 2017-08-30 | 2017-08-30 | A kind of piezo vibration module |
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| Publication Number | Publication Date |
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| CN107508498A CN107508498A (en) | 2017-12-22 |
| CN107508498B true CN107508498B (en) | 2019-06-11 |
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| CN201710764284.5A Active CN107508498B (en) | 2017-08-30 | 2017-08-30 | A kind of piezo vibration module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112769349A (en) * | 2020-12-25 | 2021-05-07 | 西安交通大学 | Cymbal type piezoelectric single crystal driver |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123404A (en) * | 2007-09-07 | 2008-02-13 | 华南农业大学 | Cymbals driver based on tangential distortion and its driving method |
| CN103022339A (en) * | 2012-12-28 | 2013-04-03 | 东南大学 | Orthogonal piezoelectric displacement amplifying mechanism |
| CN105429504A (en) * | 2015-12-12 | 2016-03-23 | 西安交通大学 | Bidirectional piezoelectric stack actuator with diamond and hourglass-shaped mechanisms connected in series and actuating method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080191584A1 (en) * | 2007-02-08 | 2008-08-14 | Malkin Matthew C | Spring disc energy harvester apparatus and method |
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2017
- 2017-08-30 CN CN201710764284.5A patent/CN107508498B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123404A (en) * | 2007-09-07 | 2008-02-13 | 华南农业大学 | Cymbals driver based on tangential distortion and its driving method |
| CN103022339A (en) * | 2012-12-28 | 2013-04-03 | 东南大学 | Orthogonal piezoelectric displacement amplifying mechanism |
| CN105429504A (en) * | 2015-12-12 | 2016-03-23 | 西安交通大学 | Bidirectional piezoelectric stack actuator with diamond and hourglass-shaped mechanisms connected in series and actuating method thereof |
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| CN107508498A (en) | 2017-12-22 |
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Address after: 200437 No. 99, Handan Road, Shanghai, Hongkou District Patentee after: Shanghai Material Research Institute Co.,Ltd. Address before: 200437 No. 99, Handan Road, Shanghai, Hongkou District Patentee before: SHANGHAI Research Institute OF MATERIALS |
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