CN1041987C - Full spectrum electroacoustic enery transducer - Google Patents
Full spectrum electroacoustic enery transducer Download PDFInfo
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- CN1041987C CN1041987C CN 94111696 CN94111696A CN1041987C CN 1041987 C CN1041987 C CN 1041987C CN 94111696 CN94111696 CN 94111696 CN 94111696 A CN94111696 A CN 94111696A CN 1041987 C CN1041987 C CN 1041987C
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Abstract
The present invention relates to a full-spectrum electroacoustic transducer. N-tuple magnetic fields are reasonably formed from permanent magnetic material and soft magnetic material by principles of electromagnetics, mechanics, vibrational science and acoustics. The n-tuple magnetic fields and n-tuple matched electroacoustic transducing elements mutually act, and then the full-spectrum electroacoustic transducer is manufactured. The full-spectrum electroacoustic transducer is used for converting all electroacooustics, and is reversible. The present invention has the advantage that the present invention is suitable to manufacture full-audio integrated electroacoustic transducers of various powers and volumes; the present invention can exert the superiority after being applied to large-scale, middle-scale, small-scale and miniature occasions; the present invention overcomes the defects of distortion of sound source positions, large volume, etc. which can not be overcome by the existing multiple-loudspeaker sound box, and realizes full-spectrum response with high fidelity and high sound quality in the field of electroacooustic conversion.
Description
The present invention relates to a kind of electroacoustic transduction method and device.
Because due to material, geometry and the size and solid vibration characteristics of electroacoustic transduction vibrating elements, electroacoustic transducer vibrating body can only a certain frequency band of uniform response acoustic vibration, so existing electroacoustic transducer will obtain broad spectral response, can only be provided with independently how cover varies in size by frequency-division section, the combination of the different or variform a plurality of energy converting systems of material has the audio amplifier of high, medium and low three or more loud speaker of frequency as the modern times; Thereby have that structural detail is many, cost is high, volume is big, take material many, take a lot of work, time-consuming ... etc. shortcoming; And can not be at small-sized and miniature broadcast receiver, include in cassette player, the big or small television set, more can not in earphone, hearing aids, adopt frequency division formula transducer to widen the frequency response band.
Moreover the sound that sends from same sound source press frequency segmentation, and a plurality of loudspeaker responses of high, medium and low sound of diverse location are sent from the plane, thereby appearance just becomes the inevitable shortcoming of modern audio amplifier by the sound source position distortion that loudspeaker box structure determined.
Chinese patent CN2041875.U attempts to address the above problem.The technical scheme main points of this patent are the high pitch loudspeakers that bore is less, with the core limb of woofer be supported in diameter more greatly, darker inboard, woofer cone mouth plane, coaxial line is installed.Except that being machinery high and low sound loud speaker has been carried out the adjustment of relative geometry position,, do not make architecture advances to high and low sound loud speaker itself in fact.Simultaneously, by this scheme, to the response of entire spectrum acoustic vibration, can only be with two vibrating members responses of high and low sound, obviously its frequency range is limited, has taken high band and low-frequency range into account, Mid Frequency deficiency then, vice versa.Moreover, with regard to its structure, also be not easy to the plural loud speaker of coaxial installation; Tentatively suppose that a plurality of loud speakers of coaxial installation can realize, the result who is done, be tantamount to a plurality of loud speakers with plane distribution on the modern audio amplifier and change coaxial straight line into and distribute and install, thus produce that the sound source position straight line distributes apart from distortion, can't resolve the problem of dtmf distortion DTMF of sound source spatial distribution too.
Similar design also sees Shandong science tech publishing house with book number No. 15195.161, the 618th page of " stereo reception and reproducing process " book of publishing in 1985.
Problem in view of above-mentioned prior art exists the purpose of this invention is to provide a kind of while, concentricity method of carrying out multiband electroacoustic energy delivery and conversion; And a tree name with manufacture and design a kind of novel structure, Hz-KHz wide, can overcome sound source position distortion, reduction equipment volume, save the full spectrum electroacoustic enery transducer of component, to address the above problem.
The high, medium and low sound loud speaker of tradition moving-coil type, excitation type and magneto are arranged, divide structures such as external magnetic type and internal magnetization again, their common feature is in the independent ring-type radial magnetic field that the magnetic circuit member forms, the moving-coil of a fixed vibrating body of device, can realize the response of a certain frequency range sound, but all can not satisfy the demand that covers the voice range broad spectrum.The present invention is according to voice range frequency range and the concentrated requirement of sound source position, use modern ferromagnetics, electromagnetism, the electroacoustics theory, design is made with one heart, the moving-coil of coaxial multiple magnetic field and multiple adaptive fixed vibrating body, respond the acoustic vibration of a plurality of different frequency ranges simultaneously respectively, and from same center radiation or absorb the new method of carrying out electroacoustic energy delivery and conversion of sound wave, make multiband Electroacooustic power conversion device simultaneously, has novel structure, can need cover the full spectrum electroacoustic enery transducer of full sound threshold by frequency range, therefore overcome the defective of above-mentioned existing loud speaker and combination sound box, reached purpose of the present invention.
Now press the structural principle of full spectrum electroacoustic enery transducer, divide general structure, the electroacoustic transduction of structure, the multiband electroacoustic transducer of structure, the electroacoustic transduction element in the heavy magnetic field of n mechanism and process, improve several parts of measure of systematic function, accompanying drawings is as follows:
Fig. 1: the full profile of entire spectrum lantern ring type (n=4 frequency range) electroacoustic transducer;
Fig. 2: solid (Fig. 2-1) and hollow (Fig. 2-2) stepped-wheel type magnetic circuit system profile;
Fig. 3: solid (Fig. 3-1) and hollow (Fig. 3-2,3-3) folds magnetic-type magnetic circuit system profile;
Fig. 4: reversible (n=4 frequency range) magnetic circuit system profile;
Fig. 5: the entire spectrum collar is folded the full profile of magnetic-type (n=4 frequency range) electroacoustic transducer;
Fig. 6: two-band electroacoustic transducer profile;
Fig. 7-1,7-2,7-3: vibrating body structural shape profile;
Among each figure, C (C
1, C
2, C
3, C
4)---round platform (cylinder) or annular magnetic gonosome; T
o---cup-shaped magnetic conductor; T (T
1, T
2, T
3, T
4)---disk or annular magnetic conductor; D (D
1, D
2, D
3, D
4)---moving-coil; Z (Z
1, Z
2, Z
3, Z
4)---vibrating body; K---pore double as conduction lead-out wire hole; X---conduction lead-out wire (two-wire); J---insulation joint plate; P---basin frame or support; Y---flanging ring; H (H
1, H
2)---ring; F---protective cover; B---elastic centering props up sheet; G---sound isolation reflector; L---sound-absorbing material;
The structure of heavy concentric, coaxial, the ring-type of n, radial magnetic field is as follows:
Among Fig. 1, at the cup-shaped magnetic conductor (T of cylindero) inwall and cylindrical permanent magnet (C concentric at the cup inner bottom surface, coaxial fixed axial magnetized1) between, paste the end, concentric, coaxial parallel suit n (〉=2) level and permanent magnet C from small to large1Contour, and mutually leave annular permanent-magnet body (C spacing, axial magnetized2、C
3、C
4), the concentric fixed external diameter in each permanent magnet upper surface is greater than corresponding permanent magnet external diameter, internal diameter internal diameter, interannular adjacent side space and annulus magnetic conductor (T alignment, that have 3 grades of annular stepped less than corresponding permanent-magnetic clamp2、T
3、T
4…)，C
1The fixed disc magnetic conductor of end face T1, forming n level concentric, coaxial, ring-type, axis projection from small to large is donut Radial magnetic field; Be called lantern ring type motor structure (as shown in Figure 1).
Air drag when vibrating for reducing each vibrating body is at each magnetic conductor (T2、T
3、T
4) second ladder and cup-shaped magnetic conductor (To) bottom (and sidewall) evenly distributes axially that (radially) passage doubles as 6～40 in lead lead-out wire hole (K).
Among Fig. 2, with the magnet round platform or the annulus (C of the different axial magnetized of a plurality of diameters
1, C
2, C
3), coaxial fixed or be made into whole stepped-wheel type along order from small to large, coaxially on formed ladder fixedly make the side with magnetic conductor and ring is arranged in pore, the band base and the cylinder of axial pore outer shroud is arranged, the base ring diameter can be equal to or greater than higher level's magnet external diameter in the cylinder, outer side ring external diameter is equal to or greater than this ladder external diameter, and promptly form ring-type, the uniform radial magnetic field in gap (shown in Fig. 2-1) up and down between the cylinder; The stepped-wheel type magnetic circuit system structure that is called solid (as Fig. 2-1) or hollow (as Fig. 2-2).
Among Fig. 3, round platform or round ring magnet C
1Go up concentric fixed diameter more than or equal to C
1The magnetic conductor disk T of external diameter
1, again with round platform or the ring magnet (C of a plurality of diameters according to the axial magnetized of order increase
2, C
3), coaxial being cemented in magnetic conductor made the base ring and the cylinder (T at the end that there is pore (K) radially the side and axial pore (K) is arranged respectively
2, T
3) and last be cup-shaped magnetic conductor T
oBottom [no bottom outlet is as (Fig. 3-1,3-2) or the center bottom outlet adaptive with ring magnet (as Fig. 3-3) arranged], again by from small to large in proper order coaxial fixed be an integral body; Between each neighbouring two cylinder, form two-stage uniform circular radial magnetic field (shown in Fig. 3-1,3-2,3-3) at interval, be called solid (Fig. 3-1) or hollow (Fig. 3-2 internal orifice dimension does not wait, Fig. 3-3 internal orifice dimension equate) folds magnetic-type magnetic circuit system structure.
The lantern ring type of the heavy concentric magnetic figured stone of above-mentioned formation n (〉=2), stepped-wheel type, folded magnetic-type magnetic circuit system structure can applied in any combination, as (as shown in Figure 5) such as collar stepped-wheel type, the folded magnetic-types of the collar.Among Fig. 5, the 1st, 2 grade is the lantern ring type magnetic structure, and the 3.4th grade is the folded magnetic-type magnetic structure of no centre bore; Obviously, the 3rd, 4 ... level can form required multistage concentric annular radial magnetic field equally with other stepped-wheel types or folded magnetic-type structure.
Said structure can also have the various deformation structure, as shape, size, the invariant position of each component in the lantern ring type structure, if former each ring-type magnetic conductor and T
oWith replacing to encircling the magnetized permanent magnet of side surface direction by the bottom surface, former each permanent magnet replaces with magnetic conductor, and promptly material exchanges n (〉=2) the level annular concentric magnetic field that is constituted.
And for example the permanent magnet in the lantern ring type structure is alternate (as the C among Fig. 1
1With alternate C
3) change the magnetic conductor that the identical soft magnetic material of body is made into, the magnetic circuit system of the formed n of the half saved permanent magnet (〉=2) the level concentric magnetic field that all the other structures are all constant.
Magnetic in the and for example above-mentioned entire spectrum n frequency range electroacoustic transducer can be excitation type (electromagnetic type) magnetic, also can be integral type or composite type permanent magnet (combining) by permanent magnet monoblocks such as rare earth permanent-magnetic material, iron nickel cobalt, permanent-magnet ferrite, magnet steel or polylith, also can combine, all can form n (〉=2) level concentric magnetic field magnetic circuit system with permanent magnet and soft magnetic material (pure iron, silicon steel, soft magnetic ferrite, permalloy etc.).
And for example at the cup-shaped magnetic conductor (T of above-mentioned various electroacoustic transducer
o) the bottom surface a kind of above-mentioned various magnetic circuit system oppositely is installed, be assembled into all n (〉=2) level multiple concentric magnetic circuit system of two-way electroacoustic transducer (as Fig. 4); Its advantage is to save material, and more multiband transducing level can be installed in same space, and promptly volume is close and with better function; And can carry out electroacoustic transduction directly at two-way space radiation or absorption sound wave.For example, make former loud speaker can only directly form the half space sound field, form total space sound field and become direct radiation.
The structure of the electroacoustic transduction element of full spectrum electroacoustic enery transducer is by moving-coil (D) and the concentric fixed formation of vibrating body (Z).Wherein, moving-coil (D) forms on thin shell barrel with insulated conductor is close, and thin shell barrel is suitable for reading concentric fixed with vibrating body.Each vibrating body (Z) with animal and plant fibers such as metal, plastics or cotton, hair, fiber crops, silk and staple fibre be the various fabrics of material and with rubber, resin, polyester coating through process formings such as coating, dipping, compactings; It is shaped as ball apical grafting ring limit shape (Fig. 7-1), central ball apical grafting semi-ring cylinder shape (Fig. 7-2) and ball apical grafting tubaeform (Fig. 7-3), or it is tubaeform (as Z among Fig. 5 not have central ball top
3, Z
4); Its quality, thickness increase with the reduction of frequency response band frequency; Its edge has to be made 0 with the reduction of response band frequency and constitutes to a plurality of elasticity rings (H).
The general structure of multiband electroacoustic transducer is shown in accompanying drawing (Fig. 1, Fig. 5, Fig. 6), in aforementioned all types of n level concentric magnetic field concentric, coaxial install respectively with the geometric parameter in magnetic fields at different levels (diameter, highly, thickness) and frequency response section adaptive, can be in each magnetic gap axial free-moving moving-coil (D), the outward flange of fixed with it vibrating body (Z), be fixed on the relevant position of magnetic conductor at the same level (T), sound isolation reflector (G) or basin frame (P) (as Fig. 1, Fig. 5, Fig. 6), and be added with flanging ring (Y); Centering, low-frequency range are added with elastic centering and prop up sheet (B), to keep the tram (as Fig. 1, Fig. 5, shown in Figure 6) of this moving-coil in corresponding magnetic field; The conduction lead-out wire (X) of moving-coils at different levels is drawn through contiguous pore (K), and line end is welded on the corresponding solder joint of insulation joint plate (J).They can respond the electroacoustic signal of frequency range separately simultaneously, satisfy the multiband electroacoustic transduction of the wide needs of full range.
The mechanism and the conversion process of energy of this electroacoustic transducer are as follows: when importing the signal of telecommunication of acoustic vibration in each moving-coil (D), each hot-wire coil drives vibrating bodies at different levels (Z) and does mechanical oscillation under the effect of magnetic field forces at different levels, thereby output is with the sound of change in electric; If during the input acoustic vibration, its corresponding vibrating body (Z) vibrates under the acoustic pressure effect, drive each moving-coil (D) and in each self-magnetic field, move, according to the law of electromagnetic induction, can respond to the signal code of the corresponding acoustic vibration of output.Because of than, the mechanism of this electroacoustic transducer, electroacoustic transfer process and purposes all are reversible, i.e. the signal of telecommunication of each frequency range acoustic vibration and acoustic vibration correspondence each other inputs or outputs.Therefore, both loud speaker, earphone can be made, also microphone etc. can be made.
For protecting height, intermediate frequency moving-coil can use the electroacoustic signal frequency divider, electroacoustic signal is forced frequency division; Import respectively again in each frequency range moving-coil and carry out electroacoustic transduction.
Make a general survey of above-mentioned, the invention provides the new method of a kind of electroacoustic energy delivery and conversion: promptly by integral type, knockdown magnetic conductor and magnetic (excitation type-electromagnetic type, magneto) makes lantern ring type (as Fig. 1), stepped-wheel type is (as Fig. 2-1, Fig. 2-2), folded magnetic-type is (as Fig. 3-1, Fig. 3-2, Fig. 3-3) or its combination, constitute the n (〉=2) of one-way fashion or reversible heavy from small to large with one heart, coaxial, ring-type, axis projection is that the magnetic circuit system of radial magnetic field of donut is concentric again, the coaxial installation respectively and concentric magnetic field at different levels and the adaptive fixed vibrating body of electroacoustic transduction element-moving-coil of frequency response section, make each moving-coil realize multiband electroacoustic energy simultaneously at each self-magnetic field axis to free movement, with one heart, coaxially freely change.
In sum: another purpose of the present invention can realize by following measure: by integral type, knockdown magnetic conductor and magnetic (excitation type-electromagnetic type, magneto) makes lantern ring type, stepped-wheel type, folded magnetic-type or its combination, constitute the n (〉=2) of one-way fashion or reversible heavy from small to large with one heart, coaxial, ring-type, axis projection is the radial magnetic field of donut, concentric again, the coaxial installation respectively and concentric magnetic field at different levels and the adaptive fixed vibrating body of electroacoustic transduction element-moving-coil of frequency response section, make each moving-coil respond the acoustic vibration of frequency range separately at each self-magnetic field axis to free movement.
In fact, utilize multiple concentric, coaxial, ring-type, radial magnetic field and the moving-coil fixed vibrating body adaptive of above-mentioned various structure types, all can be assembled into full spectrum electroacoustic enery transducer with magnetic fields at different levels; Assembled embodiment as various combining structures of the present invention further specifies in conjunction with Fig. 1:
Fig. 1 is the full profiles of 4 frequency range electroacoustic transducers along the axis, and component all is that symmetry axis is installed with the axis among the figure.One cylindrical permanent magnet (C
1) the fixed disk magnetic conductor of end face (T
1), the cup-shaped magnetic conductor (T of their outside and cylinder
o) concentric from small to large, coaxial parallel step by step suit outer-magnet speaker is used between the inwall ring-type, axial magnetized permanent magnet C
2, C
3, C
4With the upper surface magnetic conductor T of 3 grades of ladders is arranged
2, T
3, T
4(shape as shown in the figure); Wherein the external diameter of each permanent magnet is less than the external diameter of corresponding magnetic conductor, and the internal diameter of each permanent magnet is greater than the internal diameter (as shown in Figure 1) of each corresponding magnetic conductor.Between each magnetic conductor, form 4 grades of concentric, coaxial, parallel, symmetrical, uniform circular radial magnetic fields, concentric, coaxial respectively in these 4 grades of magnetic fields, 4 cover electroacoustic transduction elements of parallel installation and response frequency band adapted---difference fixed vibrating body (Z separately
1, Z
2, Z
3, Z
4) moving-coil (D
1, D
2, D
3, D
4), make each moving-coil can each self-magnetic field axis to the motion freely; The electric current lead-out wire is made with insulated conductor in each frequency range coil two ends, nearby pore (the double lead lead-out wire hole of doing) (K) is drawn on each magnetic conductor on the magnetic circuit, be connected to and be screwed on the wiring fulcrum (4 * 2) of the insulation joint plate (J) on basin frame (P) or the cup-shaped magnetic conductor of cylinder (T0) wall, acoustoelectric current is come in and gone out thus.
Action of Superhigh Frequency Vibration body (Z
1), adopt Metal Ball top shape vibrating membrane, ball top end radius and moving-coil D
1Radius equates that its periphery is outer to be the planar circular of same metal film, the outer radius of ring and magnetic conductor (T
2) on the outer radius of second level ladder equate that this ring is cemented in these rank along last (as shown in Figure 1).Moving-coil (D
1) the coil two ends draw and be cemented under this planar circular with insulated conductor (X), through magnetic conductor (T
2) side opening (K) and cup-shaped magnetic conductor (T
o) side or the pore at the end (K) cause on two wiring points of insulation joint plate (J).
Dither body (Z
2), adopt Metal Ball top shape vibrating membrane, ball top end radius and moving-coil (D
2) radius equates, is a part that is intercepted the cylinder anchor ring perpendicular to the plane of symmetry axis outside its periphery, its internal diameter equals moving-coil (D
2) external diameter, its external diameter and magnetic conductor (T
3) on the internal diameter of second level ladder equate that the external planar circular of this cylinder anchor ring is with magnetic conductor (T
3) on second level ladder anchor ring size identical, and fixed with it.Moving-coil (D
2) the coil two ends draw and be cemented under this cylinder anchor ring, with insulated conductor (X) through magnetic conductor (T
3) axial side opening and cup-shaped magnetic conductor (T
o) pore (K) on the end causes on two wiring points of insulation joint plate (J).
Intermediate frequency vibrating body (Z
3), the ball top shape vibrating membrane that adopts diaphragm materials (fabricbase coating, plastics, paper etc.) commonly used to make, ball top end radius and moving-coil (D
3) radius equates, is a part that is intercepted the cylinder anchor ring perpendicular to the plane of symmetry axis outside its periphery, its internal diameter equals moving-coil (D
3) external diameter, its external diameter and magnetic conductor (T
4) on the internal diameter of third level ladder equate, this annulus cylinder is external-with magnetic conductor (T
4) on the identical planar circular of third level ladder anchor ring size, and fixed with it.At vibrating body (Z
3) annulus cylinder and moving-coil (D
3) mutually under the knot place, a fixed internal diameter equals moving-coil (D
3) elastic centering of external diameter props up sheet (B), a sheet outer is cemented in magnetic conductor (T
4) second rank along last (as shown in Figure 1).Moving-coil (D
3) the coil two ends draw and be cemented under this cylinder anchor ring, with insulated conductor (X) through magnetic conductor (T
4) axial side opening and cup-shaped magnetic conductor (T
o) pore (K) on the end causes on two wiring points of insulation joint plate (J).
Low-frequency vibration body (Z
4), the ball top shape vibrating membrane that adopts diaphragm materials (fabricbase coating, plastics, paper etc.) commonly used to make, ball top end radius and moving-coil (D
4) radius equates, is tubaeform outside its periphery, following bore equals moving-coil (D
4) radius, upper brim tear 1～2 on ring (H) open along adding fabricbase coating (or rubber), be consolidated in basin frame (P) upper brim edge, can be added with flanging ring (Y).At vibrating body (Z
4) loudspeaker end opening and moving-coil (D
4) mutually under the knot place, a fixed internal diameter equals moving-coil (D
4) elastic centering of external diameter props up sheet (B), its outer is cemented in second rank of basin frame (P) along last (as shown in Figure 1).Moving-coil (D
4) lead-out wires of coil (X) on the side opening (K) of basin frame (P) causes two wiring points on the exhausted terminal block (J) of edge.
As above installation promptly constitutes entire spectrum lantern ring type 4 frequency range electroacoustic transducers.
For improving electroacoustic transduction systematic function of the present invention, can increase following measure:
1. the sound isolation reflector (G) that installs additional in the full spectrum electroacoustic enery transducer, optionally be installed on the sidewall of magnetic conductor between adjacent two vibrating bodies (as shown in Figure 5), be the truncated cone shape of thickness more than or equal to the power function curve surfacess of revolution such as taper seat, anchor ring, hyperboloid or parabola of the hard material formation of 0.2mm, the intercept height is suitable, and the inwall Pasting has sound-absorbing material; Their effect is to support, locate corresponding moving-coil (D) and vibrating body (Z), and absorb acoustic radiation between itself and the built-in vibrating diaphragm, isolate the mutual interference of adjacent vibrating body acoustic vibration: the acoustic emanation that its outer wall reflection next stage vibrating body sends, improve the width of cloth of corresponding stage and penetrate efficient.
2. be that each heavy magnetic field of protection electroacoustic transducer is not subjected to dynamically extraneous and static magnetic field disturbs; and can prevent dust, anti-mechanical damage; prevent that particularly magnetisable material such as ferromagnetic material from falling in the loud speaker; damage component, destroy Distribution of Magnetic Field; hinder the moving-coil free movement so that damage electroacoustic transducer; the shell of the full spectrum electroacoustic enery transducer protective cover of holding concurrently is made the magnetic sealed body of plane, curved surface, corrugated surface or its combination with the magnetic material expanded metals; constitute magnetic screen; the surface can have poromerics to cover, and ornament or pattern can be arranged.
For example, the shell that the is used for entire spectrum n frequency range loud speaker protective cover of holding concurrently is made up of basin frame and basin oral shield, and wherein basin frame (P) is made of magnetic material, is frame structure; Enough support bearing capacities (carrying whole loud speaker and vibration thereof) and intensity are arranged.Its frame hole should have the net that magnetic material constitutes; with the basin oral shield (F) of making plane, curved surface, corrugated surface or its combination with the magnetic material expanded metals; the magnetic sealed body of common formation; constitute complete magnetic screen; can there be narrow meshed fabric on the surface; not only can be by sound wave but also in order to dustproof, and can add ornament or pattern.
Further specify as follows once more as embodiments of the invention, most preferred embodiment:
Example one: collar integral type two-band electroacoustic transducer:
Press the lantern ring type magnetic circuit system, get n=2 and promptly constitute as shown in Figure 6, form double concentric annular magnetic field, install with it Z one to one again
1, Z
2, D
1, D
2, sound isolation reflector (G), magnetic defense cover (F) and corresponding accessory two frequency range collar integral type electroacoustic transducers.If will save element, can be only with a ring shaped axial magnetization permanent magnet (C
2), (C
1) available magnetic conductor replacement with shape, all the other structures are constant, also can form the magnetic circuit system with secondary concentric magnetic field, make two frequency range electroacoustic transducers; Two loudspeaker acoustic enclosures of making than prior art are not only saved a cover magnetic circuit element, and have overcome shortcoming such as sound source position distortion, have dwindled volume, also can save sound box.
Example two: lantern ring type three frequency range electroacoustic transducers:
As Fig. 1, get n=3, for saving permanent magnet, adopt C
2, C
3Two axial magnetized permanent magnets, C
3Magnetic polarity and C
2Magnetic polarity is oppositely installed with one heart, C
1, T
1, T
2, T
3And T
oAdopt Armco iron, Z
1, Z
2, Z
3And D
1, D
2, D
3, install as Fig. 1, install corresponding accessory additional, high, medium and low sound three frequency range collar integral type electroacoustic transducers.
Example three: lantern ring type four frequency range electroacoustic transducers:
Get n=4 as Fig. 1, powerful magnetic field, C are arranged again for saving permanent magnet
2, C
4Adopt axial magnetized high energy product RE permanent magnetic alloy annular permanent magnet, for improving superfrequency and high frequency response efficient, T
1, T
2Adopt permalloy, for reducing cost, T
3, T
4And T
oThe employing Armco iron is made, Z
1, Z
2, Z
3, Z
4Adopt vibrating membrane as shown in Figure 1, Z
4Flanging is with 2 roads annulars rubber flanging, Z
3Flanging is with 1 road annular fabricbase-plastic-coated ring, D
1, D
2, D
3, D
4Be moving-coil, add all annexes, promptly can be made into entire spectrum four frequency range collar integral type loud speakers.Characteristics that this is routine and advantage are only promptly to form the magnetic circuit system with level Four concentric magnetic field with two annular magnet, make four frequency range electroacoustic transduction systems, four loudspeaker acoustic enclosures of making than prior art are not only saved two cover magnetic circuit element and annexes, and have overcome shortcoming such as sound source position distortion.
Example four: the collar is folded magnetic integral type four frequency range electroacoustic transducers:
As Fig. 5 installation; Because C
3, C
4Magnet is real to have volume big, and it is many to include magnetic energy, and magnetic conductor is arranged again therebetween, so magnetic circuit is lacked magnetic gap magnetic field intensity height, thereby transducing sensitivity and conversion efficiency are higher.
Example five: the two-way collar is folded the magnetic-type electroacoustic transducer: with example one, two, three, four any two opposing settings; Except that having above-mentioned each routine advantage, can also make effective sound field expand as the total space and distribute from the half space distribution of unidirectional loud speaker.
In sum, the new method of the electroacoustic energy transmitting and converting that proposes according to the present invention is rationally established Put the heavy magnetic field of coaxial, concentric n and one by one corresponding, with one heart placement, physical dimension and machinery shake with it Dynamic characteristic is the heavy electroacoustic transduction element of different n interaction all, makes and can respond entire spectrum sound The Electroacooustic power conversion device of vibration; The structure of each vibrating body, material, size difference how no matter, its Geometric position and axial symmetry determine their acoustic vibration to send with one heart, thereby have overcome with existing Linear distribution, plane distribution and spatial distribution that the sound source position of stereo set that technology makes is arranged Distortion; Be covered with (comprising complementation) required frequency response band if suitably select as required n to have response The electroacoustic transduction element by the electroacoustic transducer that technical scheme of the present invention is made, must be realized satisfying Electroacoustic response equipment---the full spectrum electroacoustic enery transducer that required full range is wide. Therefore, make overall effect Fruit is for having the full range that desired frequency band width, Frequency Response are smooth evenly, overcome the sound source position distortion The spectrum electroacoustic transducing head is real. Its effect and advantage are as follows compared to existing technology:
1. an electroacoustic transducer can be realized acoustic vibration full spectrum electroacoustic enery transducing.
2. solved modern frequency-division section multi-loudspeaker combination sound box owing to consolidating that self structure forms The position distortions problem of the sound source plane distribution that has.
3. an ancient drinking vessel sound source position problem of dtmf distortion DTMF that the coaxial combination speaker sound distributes along axis of having determined.
4. solved the not enough problem of frequency range of " coaxial double-frequency composite loudspeakers ".
5. sound reproducing device (such as combination sound box) volume is greatly reduced relatively or remove casing from.
6. the saving structural detail for n frequency division music centers equipment, can be saved permanent magnet n/2 Individual and some respective element, cost reduces.
7. make the frequency division response of small-sized miniature electro-acoustic transducer become possibility, and effectively broadening response Frequency band comprises and makes dimension 1 ＂ following frequency division formula high performance mini loudspeaker, earphone and microphone.
8. electroacoustic transduction is reversible, and is of many uses.
9. a plurality of frequency ranges can be set as required, effectively widen equipment electroacoustic response frequency band.
10. take full advantage of n optional frequency range, the best frequency response band of each vibrating body evenly is covered with The voice range entire spectrum, the electroacoustic transduction effect of acquisition entire spectrum uniform response.
11. by magnetic defense cover and basin frame and on the Full closed magnetic shielding that consists of of magnetic dictyosome, Make the electroacoustic transducer internal magnetic field avoid dynamically extraneous and the static magnetic field interference, ensure that tonequality is pure.
12. set sound isolation reflector has effectively prevented each frequency range vibration between each frequency range vibrating body The mutual interference of body acoustic vibration, and improve corresponding band electroacoustic transduction efficient and acoustic radiation efficiency.
Thereby make people obtain high-fidelity, the enjoyment of high-quality sound equipment.
Claims (4)
1. electroacoustic energy delivery conversion method, be to utilize the magnetic field that magnetic conductor and magnetic form and moving-coil (conductive coil) interaction of fixed vibrating body to carry out the method for the mutual transmitting and converting of electroacoustic energy, it is characterized in that: by integral type, knockdown magnetic conductor and magnetic (excitation type-electromagnetic type, magneto) makes as lantern ring type (as Fig. 1), stepped-wheel type is (as Fig. 2-1, Fig. 2-2), folded magnetic-type is (as Fig. 3-1, Fig. 3-2, Fig. 3-3) or its combination, constitute one-way fashion (as Fig. 1, Fig. 2-1, Fig. 2-2, Fig. 3-1, Fig. 3-2, Fig. 3-3 etc.) or the n (〉=2) that forms of reversible structures such as (as Fig. 4) heavy from small to large with one heart, coaxial, ring-type, axis projection is the magnetic circuit system of the radial magnetic field of donut, concentric again, the coaxial installation respectively and concentric magnetic field at different levels and the adaptive fixed vibrating body of electroacoustic transduction element-moving-coil of frequency response section makes each moving-coil can be at each self-magnetic field axis to free movement; When each frequency range acoustoelectric current drives vibrating body output acoustic vibration separately by moving-coil separately is magnetic field force induced as the time spent; Otherwise the acoustic pressure of each frequency range acoustic vibration makes the vibration of each vibrating body, drives separately that moving-coil vibrates in magnetic field and the output acoustoelectric current of inducting, thus realize multiband electroacoustic energy simultaneously, the method for concentric, coaxial free transmitting and converting.
2. a full spectrum electroacoustic enery transducer is by magnetic conductor and magnetic, electroacoustic transduction element---the fixed vibrating body of moving-coil, moving-coil insulation conduction lead-out wire, pore (double as conduction lead-out wire hole), the flanging ring, shell hold concurrently protective cover or basin frame (support) and protective cover, elastic centering props up sheet, the insulation joint plate, the electroacoustic signal frequency divider constitutes, it is characterized in that: by integral type, knockdown magnetic conductor and magnetic (excitation type-electromagnetic type, magneto) makes lantern ring type, stepped-wheel type, folded magnetic-type or its combination, constitute the n (〉=2) of one-way fashion or reversible heavy from small to large with one heart, coaxial, ring-type, axis projection is the radial magnetic field of donut, concentric again, the coaxial installation respectively and concentric magnetic field at different levels and the adaptive fixed vibrating body of electroacoustic transduction element-moving-coil of frequency response section, make each moving-coil respond the acoustic vibration of frequency range separately at each self-magnetic field axis to free movement; And isolation reflector and magnetic defense cover can be housed.
3. full spectrum electroacoustic enery transducer according to claim 2: it is characterized in that installable sound isolation reflector (G) is the truncated cone shape of thickness more than or equal to the power function curve surfacess of revolution such as taper seat, anchor ring, hyperboloid or parabola of the hard material formation of 0.2mm, the intercept height is suitable, and the inwall Pasting has sound-absorbing material.
4. the described full spectrum electroacoustic enery transducer of root a tree name claim 2: it is characterized in that installable magnetic defense cover makes the magnetic sealed body of plane, curved surface, corrugated surface or its combination with the magnetic material expanded metals, constitute magnetic screen, the surface can have poromerics to cover, and ornament or pattern can be arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111696 CN1041987C (en) | 1994-03-31 | 1994-03-31 | Full spectrum electroacoustic enery transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111696 CN1041987C (en) | 1994-03-31 | 1994-03-31 | Full spectrum electroacoustic enery transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1109669A CN1109669A (en) | 1995-10-04 |
| CN1041987C true CN1041987C (en) | 1999-02-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94111696 Expired - Fee Related CN1041987C (en) | 1994-03-31 | 1994-03-31 | Full spectrum electroacoustic enery transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1041987C (en) |
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1994
- 1994-03-31 CN CN 94111696 patent/CN1041987C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1109669A (en) | 1995-10-04 |
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