CN103686564A - Multi-layer monolithic ceramic bi-crystal type piezoelectric bone conduction vibrator - Google Patents
Multi-layer monolithic ceramic bi-crystal type piezoelectric bone conduction vibrator Download PDFInfo
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Abstract
The invention provides a multi-layer monolithic ceramic bi-crystal type piezoelectric bone conduction vibrator. The vibrator comprises two parts. The two parts are overlapped together by sintering two single-crystal piezoelectric ceramic chips with the polarization directions opposite and a middle isolation ceramic layer is arranged between the two single-crystal piezoelectric ceramic chips with the polarization directions opposite. Each single-crystal piezoelectric ceramic chip is formed by overlapping and sintering N piezoelectric ceramic layers, an electrode layer is arranged between every two piezoelectric ceramic layers, and the electrode layers are connected in parallel in a crossed mode. The electrode layers comprise positive electrode layer bodies, negative electrode layer bodies and grounding electrode layer bodies. When positive electrodes and negative electrodes are powered on at the same time, the ceramic layers between one part of the positive electrodes and one part of the negative electrodes can realize bending vibration, the ceramic layers between the other part of the positive electrodes and the other part of the negative electrodes can realize stretching vibration, and therefore an automatic bending vibration bi-crystal chip structure can be formed. The multi-layer monolithic ceramic bi-crystal type piezoelectric bone conduction vibrator has the advantages of being free of electromagnetic radiation, low in power consumption, high in response speed, low in weight, small in size, exquisite in structure, clear in communication voice and free of voice outlet hole forming, having air conduction and bone conduction functions, brining convenience to complete machine waterproof design and the like.
Description
Technical field
The invention belongs to piezoelectricity bone conduction hearing device technical field, be specifically related to a kind of only stone twin crystal formula piezoelectricity osteoacusis oscillator, can be used for mobile phone osteoacusis receiver, osteoacusis bluetooth earphone, osteoacusis communication head-telephone, ossiphone earphone, spectacle, campaign-styled bone conduction auditory device etc.
Background technology
Bone conduction auditory device is not only applicable to have the patient of conductive hearing impairment, is applicable to normal person yet, and normal person's ears are liberated, and being more suitable for fire-fighting, fight etc. has the special occasions of specific (special) requirements to communication.It is acoustic vibration element that piezoelectric bone conduction hearing device adopts multilayer monolith twin crystal formula piezoelectricity osteoacusis oscillator, and audio signals is converted into vibration signal, via bones of cerebral cranium, stimulates auditory nerve to make people produce the sense of hearing.This device can be used for mobile phone osteoacusis receiver, osteoacusis bluetooth earphone, osteoacusis communication head-telephone, ossiphone earphone, spectacle, campaign-styled bone conduction auditory device etc., can carry out many-sided use for people and the normal person of conductibility dysacousis.There is electromagnetic-radiation-free, low in energy consumption, fast response time, the advantage such as quality is light, and delicate structure has conductance and bone conduction function concurrently, and call voice is clear.
At present, traditional bone conduction auditory device mostly is electromagnetic type osteoacusis, utilizes the acoustical signal that inductive reaction sends communication equipment to transfer mechanical oscillation signal to, via bones of cerebral cranium, stimulate auditory nerve to make people produce the sense of hearing, exist volume large, consume energy high, be subject to the shortcomings such as electromagnetic interference.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned electromagnetic type bone conduction hearing device, a kind of multilayer monolith twin crystal formula piezoelectricity osteoacusis oscillator is provided, there is electromagnetic-radiation-free, low in energy consumption, fast response time, quality is light, delicate structure, have conductance and bone conduction function concurrently, call voice is clear and need not output sound hole, is convenient to the advantages such as complete machine waterproofing design.
Technical scheme of the present invention is: a kind of multilayer monolith twin crystal formula piezoelectricity osteoacusis oscillator, it is characterized in that: described oscillator comprises two parts, these two parts are laminated on together by sintering mutually by two contrary monocrystalline piezoelectric potsherds of polarised direction, two middle one deck intermediate isolating ceramic layers that are provided with of monocrystalline piezoelectric potsherd that polarised direction is contrary; Monocrystalline piezoelectric potsherd is made by the stacked sintering that closes of N lamination electroceramics respectively, is provided with an electrode layer between every layer of piezoceramics layer, and electrode layer is connected in parallel by interdigital mode; Described electrode layer comprises positive electrode layer, positive electrode layer and ground electrode layer, wherein positive electrode layer is connected in parallel by incline electrode and positive electrode, positive electrode layer is connected in parallel by incline electrode and negative electrode, and ground electrode layer is connected in parallel by incline electrode and grounding electrode.
Wherein electrode layer adopts Ag/Pd electrode material.
N layer is at least 2 layers.
The present invention adopts that multilayer piezoelectric ceramic is low temperature co-fired to be made, and the international counterparts industry such as Japan are all led in the piezoelectricity industry core technology aspects such as its material prescription technology, low-temperature sintering technology, continuous polarization technology.There is electromagnetic-radiation-free, low in energy consumption, fast response time, quality is light, and volume is little, and delicate structure has conductance and bone conduction function concurrently, and call voice is clear and need not output sound hole, is convenient to the advantages such as complete machine waterproofing design.
The present invention can produce purer vibration mode without the bonding of sheet metal and bonding agent, makes the volume of hearing device larger, and tonequality is better, and performance is more stable, and can greatly reduce integral thickness, adapts to the microminiaturized needs of electronic devices and components.
The present invention is at two middle one deck intermediate isolating ceramic layers that are provided with of monocrystalline piezoelectric potsherd that polarised direction is contrary, when making two single-crystal ceramic sheet work, given play to separately intermediate isolating ceramic layer maximum capacitance, thereby raising energy conversion rate, makes the performance of oscillator better.
The only stone twin crystal of the present invention formula piezoelectric vibrator comprises positive electrode, negative electrode and grounding electrode, when positive and negative electrode powers up simultaneously, wherein the ceramic layer between a part of positive electrode and grounding electrode is realized flexural vibrations, and ceramic layer between another part negative electrode and grounding electrode is realized stretching vibration, thereby form the double wafer structure of autonomous flexural vibrations.Without bonded metal sheet, just can realize vibration and transmit.
Accompanying drawing explanation
Fig. 1 is surface texture schematic diagram of the present invention.
Fig. 2 is internal structure schematic diagram of the present invention.
Fig. 3 is circuit connection diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, multilayer monolith twin crystal formula piezoelectricity osteoacusis oscillator is divided into two parts, these two parts are laminated on together by common burning mutually by two contrary monocrystalline piezoelectric potsherds 7 and 9 of polarised direction, monocrystalline piezoelectric potsherd 7 and 9 realize and being connected in parallel by interdigital electrode connection mode between ceramic layer separately, between two single-crystal ceramic sheets 7 and 9, be provided with one deck intermediate isolating ceramic layer 8, this distinctive structure makes each single-crystal ceramic sheet 7 and 9 can give play to best capacitance, greatly improved the useful effect power of piezoelectric vibrator, improved the sensitivity of monomer, the piezoelectric vibrator energy transformation ratio of same specification size is improved, thereby volume is larger, tonequality is better, performance is more stable.
As shown in Figure 2, monocrystalline piezoelectric potsherd 7 and 9 is made by the superimposed sintering of N layer (N >=2) piezoceramics layer respectively, is monolithic structure, is provided with an electrode layer between every layer of piezoceramics layer, electrode layer is connected in parallel by interdigital mode, and electrode layer adopts Ag/Pd electrode material.
Described electrode layer is divided into positive electrode layer, positive electrode layer and ground electrode layer, wherein positive electrode layer is connected in parallel by incline electrode 4 and surperficial positive electrode 1, positive electrode layer is connected in parallel by incline electrode 5 and surperficial negative electrode 2, and ground electrode layer is connected in parallel by incline electrode 6 and surface earthing electrode 3.
As shown in Figure 3, when positive voltage is added in positive electrode 1 and negative electrode 2 simultaneously, pass through inverse piezoelectric effect, multilayered ceramic between positive electrode 1 and grounding electrode 3 amounts to and burns single-crystal ceramic sheet 7 shortenings that form, multilayered ceramic between negative electrode 2 and grounding electrode 3 amounts to and burns single-crystal ceramic sheet 9 elongations that form, and whole potsherd produces convex curved deformation; When negative voltage is added in positive electrode 1 utmost point and negative electrode 2 simultaneously, pass through inverse piezoelectric effect, multilayered ceramic between positive electrode 1 and grounding electrode 3 amounts to and burns single-crystal ceramic sheet 7 elongations that form, multilayered ceramic between negative electrode 2 and grounding electrode 3 amounts to and burns single-crystal ceramic sheet 9 shortenings that form, and whole potsherd produces matrix Bending Deformation.When now piezoelectric ceramic piece connects AC power, potsherd presents flexural vibrations, and the structure of twin crystal formula has increased ceramic amplitude and strength.
It should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein replaced on an equal basis.
Within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a multilayer monolith twin crystal formula piezoelectricity osteoacusis oscillator, it is characterized in that described oscillator comprises two parts, these two parts are laminated on together by sintering mutually by two contrary monocrystalline piezoelectric potsherd (7) and monocrystalline piezoelectric potsherds (9) of polarised direction, two middle one deck intermediate isolating ceramic layers (8) that are provided with of monocrystalline piezoelectric potsherd that polarised direction is contrary; Monocrystalline piezoelectric potsherd (7) and monocrystalline piezoelectric potsherd (9) are made by the stacked sintering that closes of N lamination electroceramics respectively, are provided with an electrode layer between every layer of piezoceramics layer, and electrode layer is connected in parallel by interdigital mode; Described electrode layer is divided into positive electrode layer, positive electrode layer and ground electrode layer, wherein positive electrode layer is connected in parallel by incline electrode (4) and surperficial positive electrode (1), positive electrode layer is connected in parallel by incline electrode (5) and surperficial negative electrode (2), and ground electrode layer is connected in parallel by incline electrode (6) and surface earthing electrode (3).
2. multilayer monolith twin crystal formula piezoelectricity osteoacusis oscillator as claimed in claim 1, is characterized in that electrode layer adopts Ag/Pd electrode material.
3. multilayer monolith twin crystal formula piezoelectricity osteoacusis oscillator as claimed in claim 1, is characterized in that N layer is at least 2 layers.
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| CN201310693118.2A CN103686564A (en) | 2013-12-16 | 2013-12-16 | Multi-layer monolithic ceramic bi-crystal type piezoelectric bone conduction vibrator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075033A (en) * | 2017-12-26 | 2018-05-25 | 广东奥迪威传感科技股份有限公司 | Piezoelectric vibrator and preparation method thereof |
| CN108206236A (en) * | 2017-12-26 | 2018-06-26 | 广东奥迪威传感科技股份有限公司 | Piezoelectric vibrator and preparation method thereof |
| CN113242499A (en) * | 2021-06-18 | 2021-08-10 | 江苏波速传感器有限公司 | Ultra-thin twin crystal multilayer piezoceramics speaker unit |
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| EP1764843A1 (en) * | 2005-09-14 | 2007-03-21 | Ariose Electronics Co., ltd. | Piezoelectric ceramic element and piezoelectric components using the same |
| CN100470867C (en) * | 2003-09-04 | 2009-03-18 | 日本电气株式会社 | Piezoelectric ceramic element and portable device |
| US20110291525A1 (en) * | 2010-05-31 | 2011-12-01 | Canon Kabushiki Kaisha | Vibration element, manufacturing method thereof, and vibration wave actuator |
| CN102883253A (en) * | 2012-10-10 | 2013-01-16 | 西安康鸿环保科技有限公司 | Piezoelectric ceramic bone conduction vibrator |
| WO2013031715A1 (en) * | 2011-09-01 | 2013-03-07 | 北陸電気工業株式会社 | Layered piezoelectric element |
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- 2013-12-16 CN CN201310693118.2A patent/CN103686564A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100470867C (en) * | 2003-09-04 | 2009-03-18 | 日本电气株式会社 | Piezoelectric ceramic element and portable device |
| EP1764843A1 (en) * | 2005-09-14 | 2007-03-21 | Ariose Electronics Co., ltd. | Piezoelectric ceramic element and piezoelectric components using the same |
| US20110291525A1 (en) * | 2010-05-31 | 2011-12-01 | Canon Kabushiki Kaisha | Vibration element, manufacturing method thereof, and vibration wave actuator |
| WO2013031715A1 (en) * | 2011-09-01 | 2013-03-07 | 北陸電気工業株式会社 | Layered piezoelectric element |
| CN102883253A (en) * | 2012-10-10 | 2013-01-16 | 西安康鸿环保科技有限公司 | Piezoelectric ceramic bone conduction vibrator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075033A (en) * | 2017-12-26 | 2018-05-25 | 广东奥迪威传感科技股份有限公司 | Piezoelectric vibrator and preparation method thereof |
| CN108206236A (en) * | 2017-12-26 | 2018-06-26 | 广东奥迪威传感科技股份有限公司 | Piezoelectric vibrator and preparation method thereof |
| CN113242499A (en) * | 2021-06-18 | 2021-08-10 | 江苏波速传感器有限公司 | Ultra-thin twin crystal multilayer piezoceramics speaker unit |
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Application publication date: 20140326 |