CN1458807A - Magnetostriction high-fidelity planar speaker - Google Patents
Magnetostriction high-fidelity planar speaker Download PDFInfo
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- CN1458807A CN1458807A CN 02114588 CN02114588A CN1458807A CN 1458807 A CN1458807 A CN 1458807A CN 02114588 CN02114588 CN 02114588 CN 02114588 A CN02114588 A CN 02114588A CN 1458807 A CN1458807 A CN 1458807A
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- magnetostriction
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- magnetostrictor
- planar speaker
- speaker
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Abstract
This invention relates to a magneto-striction type hi-fi planar loudspeaker including an amplifier output device, a sound plate, a magnetostriction device and an audio drive coils in which a line of magnetic force is set up outside of the magnetostriction device and the audio drive coil parallel to its expansion direction, the said magnetostriction device is connected with the sound plate by the amplifier output device. This invention uses bigs magnetostriction material as the audio energy exchange drive device with broad response frequency band and intensive energy.
Description
Technical field
The present invention relates to a kind of dynamic planar loudspeakers, especially a kind of magnetostriction high-fidelity planar speaker.
Background technology
Up to now, conventional loudspeakers is owing to be subjected to the restriction of technology and cost, the frequency response of coil-moving speaker is difficult to reach single loudspeaker unit and responds in full audio range in audio range, for this reason the system that mostly adopts coil-moving speaker to be linked to be by dividing network.This relates to numerous areas such as electricity, acoustics, vibration and machinery, cause cost increase or system's tonequality inferior.Make the loud speaker development be still the weakest link of electroacoustics system so far.The good loud speaker of some fidelitys such as electrostatic loudspeaker then since the restriction of the cost and the state of the art be difficult to apply.The novel type of drive of panel speaker has become the research direction in high-fidelity field under this background.Plate diaphragm is a kind of vibrating diaphragm that grew up in recent years.The core of panel speaker is that the plane drives oscillating plate.It is to drive with the nodel line position that voice coil loudspeaker voice coil is once cut apart vibration to its axial symmetry, generally is to adopt not only light not only thick rigidity but also big cellular board to make oscillating plate.And adopt electromagnetism or piezoelectric ceramic to make driver.Because the flat board of panel speaker is the face sound generation source, its dull and stereotyped each several part all can be used as relatively independent audible segment, and has certain phase difference, and its sound field is a sound field of dispersing, so the sound dispersivity of panel speaker is good; But because driver is subjected to the restriction of response speed, there is certain hysteresis quality in its vibration sounding, and desirable not enough aspect LF-response.Wherein electromagnetic type drives the amplification driving circuit that panel speaker itself has special use, and the power amplifier output signal that receives is amplified, and the power of loud speaker is restricted.Then there is the extremely aging problem of mistake in piezoelectric ceramic in the Piezoelectric Ceramic panel speaker, and needs very high driving voltage, and response frequency also has certain restriction.Except directly driving the nodel line with big voice coil loudspeaker voice coil, can also add a taper oscillating plate for above-mentioned electromagnetic driver with small-bore voice coil loudspeaker voice coil, indirectly drive dull and stereotyped nodel line, corresponding voice coil loudspeaker voice coil and magnet steel can miniaturizations, but the performance of loud speaker decreases.Another kind of type is the plane vibration plate of filled and process resin in the awl basin, as filled and process carbamic acid resin or foam styrene resin in the awl basin.Such loud speaker, also the same with the panel speaker that joint drives, there is not the cup effect, the scope of its piston type vibration is similar with awl benzvalene form loud speaker.Owing to filled foamed resin, rigidity has improved, and the oscillating plate internal loss has strengthened, and can suppress to cut apart the peak valley that vibration produces significantly, and it is more many than other vibrating diaphragm performances raisings that it cuts apart vibration performance.As disclosed driven plate loud speaker in Chinese patent 90222715.7, this driven plate loud speaker comprises plane vibration plate, voice coil loudspeaker voice coil, support, magnetic circuit system, ring, centering disk, edge-pressing strip etc., its plane vibration plate is the independent integral body that adopts thermoplastic foam to shape, and it comprises the rigid film in plate body and front thereof and the actuator chamber and some the driving muscle at the back side; Voice coil loudspeaker voice coil is bonded on the inwall of actuator chamber; Voice coil loudspeaker voice coil and plane vibration plate radius ratio equal 0.18; This loud speaker is to adopt small-bore voice coil loudspeaker voice coil directly to drive integral type plane vibration plate, can reach loud speaker general performance index substantially, but panel speaker is owing to be subjected to the restriction of core drive part, the very difficult coupling of phonation board harmony transducing part.
Of the present invention open
The objective of the invention is in order to provide a kind of use magnetostriction material in large to make audio frequency transducing drive unit, its response band is wide, energy density is big, simple in structure, the magnetostriction high-fidelity planar speaker that can reduce phonation board thickness.
Purpose of the present invention can realize by following measure:
A kind of magnetostriction high-fidelity planar speaker comprises and amplifies follower, phonation board, magnetostrictor, audio driven coil; Be provided with the magnetic line of force and the audio driven coil parallel with its flexible direction outside magnetostrictor, described magnetostrictor links to each other with phonation board by amplifying follower.
The present invention has following advantage compared to existing technology:
1, the present invention adopts the big magnetostriction material in large of energy density to do the core of transducer, has overcome the problem of compliance and transient response in the loudspeaker design, adopts very little sonic transducer can obtain big sound pressure level and very low lower frequency limit.
2, the present invention adopts elastic housing can design its magnification ratio within the specific limits arbitrarily.
3, the present invention's thickness simple in structure, its phonation board is unrestricted within the specific limits.
4, manufacture craft of the present invention is easy.
The drawing explanation
Fig. 1 is embodiments of the invention one structural representations
1-amplification follower, 2-phonation board, 3-bias magnetic field
4-magnetostrictor, 5-audio driven coil, 6-mass balance plate
Fig. 2 is embodiments of the invention two structural representations
7-magnetic conductor
Embodiments of the present invention
The present invention also incites somebody to action in conjunction with the accompanying drawings, and embodiment is described in further detail:
With reference to Fig. 1, be embodiments of the invention one; A kind of magnetostriction high-fidelity planar speaker comprises and amplifies follower 1, phonation board 2, bias magnetic field 3, magnetostrictor 4, audio driven coil 5; Described magnetostrictor 4 is to be made by magnetostriction material in large; Outside magnetostrictor 4, be provided with the magnetic line of force and the audio driven coil 5 parallel, be connected with the magnet steel of making bias magnetic field 3 usefulness at the prolonging direction of magnetostrictor 4 with its flexible direction; Described magnetostrictor 4 links to each other with mass balance piece in parallel by amplifying follower 1 and phonation board 2; Described amplification follower 1 is an elastic housing.
With reference to Fig. 2, be embodiments of the invention two.The structure of this loud speaker is removed bias magnetic field 3 and the parallel installation of the prolonging direction of magnetostrictor 4, and is connected with on bias magnetic field 3 outside the magnetic conductor 7, and all the other structures and example are together.
Claims (5)
1, a kind of magnetostriction high-fidelity planar speaker comprises and amplifies follower (1), phonation board (2), magnetostrictor (4), audio driven coil (5); It is characterized in that being provided with outside magnetostrictor (4) magnetic line of force and the audio driven coil (5) parallel with its flexible direction, described magnetostrictor (4) links to each other with phonation board (2) by amplifying follower (1).
2, magnetostriction high-fidelity planar speaker as claimed in claim 1 is characterized in that described amplification follower (1) can be elastic housing.
3, magnetostriction high-fidelity planar speaker as claimed in claim 1 is characterized in that also can being provided with outside magnetostrictor (4) or on it magnetic line of force bias magnetic field consistent with its flexible direction (3).
4, magnetostriction high-fidelity planar speaker as claimed in claim 1 or 2 is characterized in that also can being connected with magnetic conductor (7) on bias magnetic field (3).
5, magnetostriction high-fidelity planar speaker as claimed in claim 1 is characterized in that also can being connected with mass balance plate (6) at another output of amplification follower (1) parallel with phonation board (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114588 CN1458807A (en) | 2002-05-17 | 2002-05-17 | Magnetostriction high-fidelity planar speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114588 CN1458807A (en) | 2002-05-17 | 2002-05-17 | Magnetostriction high-fidelity planar speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1458807A true CN1458807A (en) | 2003-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02114588 Pending CN1458807A (en) | 2002-05-17 | 2002-05-17 | Magnetostriction high-fidelity planar speaker |
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| CN (1) | CN1458807A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101558660B (en) * | 2006-05-22 | 2013-08-21 | 奥迪欧彼塞尔斯有限公司 | Apparatus and methods for generating pressure waves |
| CN103597555A (en) * | 2011-03-07 | 2014-02-19 | 约翰逊控股公司 | Component for a vehicle |
| CN105681989A (en) * | 2016-02-26 | 2016-06-15 | 无锡吉仓纳米材料科技有限公司 | Composite diaphragm electrostatic loudspeaker of ultrathin graphite film and carbon tube film |
| CN105959889A (en) * | 2016-05-10 | 2016-09-21 | 中国人民解放军军械工程学院 | Bow stretching type giant magnetostrictive audio transduction device |
| CN111541979A (en) * | 2020-04-07 | 2020-08-14 | 湖南大学 | Magnetostrictive flextensional electroacoustic transducer |
-
2002
- 2002-05-17 CN CN 02114588 patent/CN1458807A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101558660B (en) * | 2006-05-22 | 2013-08-21 | 奥迪欧彼塞尔斯有限公司 | Apparatus and methods for generating pressure waves |
| CN103597555A (en) * | 2011-03-07 | 2014-02-19 | 约翰逊控股公司 | Component for a vehicle |
| CN105681989A (en) * | 2016-02-26 | 2016-06-15 | 无锡吉仓纳米材料科技有限公司 | Composite diaphragm electrostatic loudspeaker of ultrathin graphite film and carbon tube film |
| CN105959889A (en) * | 2016-05-10 | 2016-09-21 | 中国人民解放军军械工程学院 | Bow stretching type giant magnetostrictive audio transduction device |
| CN105959889B (en) * | 2016-05-10 | 2019-01-25 | 中国人民解放军军械工程学院 | A kind of bow formula ultra-magnetic telescopic audio transducing head |
| CN111541979A (en) * | 2020-04-07 | 2020-08-14 | 湖南大学 | Magnetostrictive flextensional electroacoustic transducer |
| CN111541979B (en) * | 2020-04-07 | 2021-07-30 | 湖南大学 | Magnetostrictive flextensional electroacoustic transducer |
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