CN1343438A - Vibration exciter - Google Patents
Vibration exciter Download PDFInfo
- Publication number
- CN1343438A CN1343438A CN00804709.XA CN00804709A CN1343438A CN 1343438 A CN1343438 A CN 1343438A CN 00804709 A CN00804709 A CN 00804709A CN 1343438 A CN1343438 A CN 1343438A
- Authority
- CN
- China
- Prior art keywords
- piezo
- electric device
- vibration exciter
- loudspeaker
- attachment part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005452 bending Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 3
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/26—Damping by means acting directly on free portion of diaphragm or cone
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
A curved piezoelectric device is attached to a plate to vibrate the plate. Mass-loading is applied to at least one free end of the piezoelectric device to increase output.
Description
Technical field
The present invention relates to the piezoelectric vibration exciter, for example can be used for applying the kind of bending vibration energy with resonance panel formation loudspeaker, and the loudspeaker that adopt the panel-form of this exciter.Our international application WO97/09842 has described this resonance panel loudspeaker and its vibration exciter.
Background technology
There have been many trials will provide tool to increase the piezo-electric device of machinery output displacement.
The device of prior art comprises ' rainbow ' piezoelectric actuator and more traditional piezoelectric actuator.
Traditional piezoelectric actuator shows limited mechanical displacement.Traditional piezo-electric device output is subject to the low basic displacement bimorph constant of material.Therefore the conventional apparatus of Rational Thickness (just, several millimeters level is inferior) only provides micron-sized mechanical output movement.' rainbow ' exciter, the piezoelectric actuator of ' crescent ' single form and double-form presents bigger mechanical output movement.Yet even the thinnest ceramic wafers, it presents the maximum output movement observed, and only provides the approximately moving displacement amount of 1mm that is limited on the z direction of principal axis for the device of a 3-4 centimeter length.In addition, the ceramic device of 0.25mm thickness is special frangible and weak, and needs are special so cause breakage easily handles.
United States Patent (USP) 5,632,841 and 5,802,195 have described the ferroelectric devices of high displacement with International Application No. WO 96/31333.
Technology contents
A purpose of the present invention is to provide the piezo-electric device that strengthens output.
According to the invention provides vibration exciter, it comprises crooked piezo-electric device, and this device has attachment part, and this device is attached to the vibration matrix and away from least one free part of this attachment part thereon, and
On at least one or each free part, provide mass loading.
This piezo-electric device can be ferroelectric devices and can apply prestressing force, and when device was used for driving the resonance bending wave panel, the prestressing force ferroelectric devices of this loading can provide surprised output to increase greatly, reaches about about amplitude level time.
Device can be the external form of arch or general roudnel device.
From another aspect, the present invention is the loudspeaker of a resonance panel-form, is driven by above-mentioned vibration exciter resonance ground.
Description of drawings
Particular embodiment of the present invention only will be illustrated by the mode of example now, and with reference to the accompanying drawing of enclosing, wherein
Fig. 1 shows first instantiation of one piezo-electric device according to the present invention,
Fig. 2 shows second instantiation,
Fig. 3 shows the 3rd instantiation, and
Fig. 4 shows the 4th instantiation.
Comprise with reference to figure 1, one loudspeaker 1: a flat board 11, it can support the bending wave pattern that resonates, described at WO97/09842.One bending, synthetic piezo-electric device 13 for example illustrates in United States Patent (USP) 5632841 that it has an attachment part 12 center configuration on this piezo-electric device.This attachment part 12 is installed in preferable, the position of leaving central authorities on the panel 11.The end points 14 of this device is for freely.The end points setting of one quality 15 at this piezo-electric device is provided on each end points of piezo-electric device 13, comes load mass to load in this piezoelectric vibration exciter to increase the output of exciter.
Fig. 2 shows a similar configuration, just replaces single quality 15, provides a pair of quality 19 on each end points of piezoelectric vibration exciter 13.
Among Fig. 3, this piezoelectric vibration exciter 21 is orbicular, is attached on the panel at this circle center, and single quality 23 is provided on the free circumferential edges 25 of exciter.These quality 23 load mass are loaded on the piezoelectric vibration exciter, increase the output of exciter.
Fig. 4 shows alternative configuration, and wherein the continuous loop 23 of Fig. 3 is replaced by the quality 27 of a plurality of appropriateness, the edge 25 of the configuration piezo-electric device of symmetry.
Therefore the present invention provides a simple mode to increase the output of exciter.
Claims (11)
1. vibration exciter, it comprises:
The piezo-electric device of one bending (13), it has an attachment part (12), is attached to a matrix (11) that will be vibrated at this this device, and away from least one free part (14) of this attachment part (12), and
One mass loading is provided at this at least one or each free part.
2. vibration exciter as claimed in claim 1, wherein this piezo-electric device (13) is a ferroelectric devices.
3. vibration exciter as claimed in claim 2, wherein this ferroelectric piezo-electric device is a prestressing apparatus.
4. the vibration exciter of each claim as described above, wherein this piezo-electric device is an arch.
5. as described each the vibration exciter of claim 1 to 3, wherein this piezo-electric device is dish-shaped.
6. loudspeaker, it comprises:
One can vibrate sonorific barrier film (11),
The piezo-electric device of one bending (13), it has an attachment part (12), is installed on this barrier film, and away from least one free part (14) of this attachment part (12), and
One is provided at the mass loading at least one or each free part (14).
7. loudspeaker as claimed in claim 6, wherein, barrier film (11) is a panel, can support bending wave and the next bending wave that encourages in panel of piezo-electric device (13) configuration.
8. as claim 6 or 7 described loudspeaker, wherein this piezo-electric device (13) is a ferroelectric devices.
9. loudspeaker as claimed in claim 8, wherein this ferroelectric devices (13) is a prestressing apparatus.
10. as each described loudspeaker among the claim 6-9, wherein this piezo-electric device (13) is an arch.
11. as each described loudspeaker among the claim 6-9, wherein this piezo-electric device (13) is dish-shaped.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9910216.2A GB9910216D0 (en) | 1999-04-29 | 1999-04-29 | Vibration exciter |
| GB9910216.2 | 1999-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1343438A true CN1343438A (en) | 2002-04-03 |
Family
ID=10852721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00804709.XA Pending CN1343438A (en) | 1999-04-29 | 2000-04-28 | Vibration exciter |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1172019B1 (en) |
| JP (1) | JP2002543727A (en) |
| CN (1) | CN1343438A (en) |
| AU (1) | AU4582400A (en) |
| DE (1) | DE60005329D1 (en) |
| GB (1) | GB9910216D0 (en) |
| TW (1) | TW472497B (en) |
| WO (1) | WO2000067525A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2009001769A1 (en) * | 2007-06-27 | 2010-08-26 | アルプス電気株式会社 | Electrostrictive actuator module |
| DE102021213003A1 (en) | 2021-11-18 | 2023-05-25 | Continental Automotive Technologies GmbH | Transducer for generating sound waves and display |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5819099A (en) * | 1981-07-27 | 1983-02-03 | Murata Mfg Co Ltd | Piezoelectric type loud speaker |
| GB2166022A (en) * | 1984-09-05 | 1986-04-23 | Sawafuji Dynameca Co Ltd | Piezoelectric vibrator |
| US5115472A (en) * | 1988-10-07 | 1992-05-19 | Park Kyung T | Electroacoustic novelties |
| UA51671C2 (en) * | 1995-09-02 | 2002-12-16 | Нью Транзд'Юсез Лімітед | Acoustic device |
| BE1011085A4 (en) * | 1997-04-03 | 1999-04-06 | Sonitron Naamloze Vennootschap | ELEMENT FOR PLAYING AND / OR RECORDING SOUND. |
-
1999
- 1999-04-29 GB GBGB9910216.2A patent/GB9910216D0/en not_active Ceased
-
2000
- 2000-04-28 AU AU45824/00A patent/AU4582400A/en not_active Abandoned
- 2000-04-28 CN CN00804709.XA patent/CN1343438A/en active Pending
- 2000-04-28 JP JP2000614776A patent/JP2002543727A/en active Pending
- 2000-04-28 DE DE60005329T patent/DE60005329D1/en not_active Expired - Lifetime
- 2000-04-28 WO PCT/GB2000/001485 patent/WO2000067525A2/en active IP Right Grant
- 2000-04-28 EP EP00927419A patent/EP1172019B1/en not_active Expired - Lifetime
- 2000-05-04 TW TW089108521A patent/TW472497B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB9910216D0 (en) | 1999-06-30 |
| DE60005329D1 (en) | 2003-10-23 |
| EP1172019B1 (en) | 2003-09-17 |
| EP1172019A2 (en) | 2002-01-16 |
| AU4582400A (en) | 2000-11-17 |
| WO2000067525A3 (en) | 2001-03-08 |
| WO2000067525A2 (en) | 2000-11-09 |
| TW472497B (en) | 2002-01-11 |
| JP2002543727A (en) | 2002-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |