CN2822084Y - Inner magnet type energy changer driver with resistance negative load property - Google Patents
Inner magnet type energy changer driver with resistance negative load property Download PDFInfo
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- CN2822084Y CN2822084Y CN 200520035371 CN200520035371U CN2822084Y CN 2822084 Y CN2822084 Y CN 2822084Y CN 200520035371 CN200520035371 CN 200520035371 CN 200520035371 U CN200520035371 U CN 200520035371U CN 2822084 Y CN2822084 Y CN 2822084Y
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Abstract
Inner magnetic transducer driver with resistance load characteristics, its upper and lower pole plate is two circles or annular or outer spill annulus flat board, one or one block permanent magnet that above uniform thickness is uniform of clamping, constitute two magnetic gaps between the outside vertical side face of described pole plate and the inner peripheral surface of a coaxial mounted cylinder shape magnetic, in magnetic gap, insert coil, the regulation two coils around to and the sense of current, make coil produce unidirectional electric power.In the carriage of a nonmagnetic substance making is wrapped on above-mentioned magnetic circuit element, constitute an inner magnetic transducer driver thus.When if transducer has pair of magnetic holosymmetric magnetic circuit of energy and coil circuit, set the inductance value and the equal turn numbers of two coils, transducer has resistance load characteristics.
Description
Technical field
The utility model relates to the electromechanical transducer driver, particularly has the inner magnetic transducer driver with two coaxial isometrical magnetic gaps and two coaxial isometrical coils of resistance load characteristics, belongs to the electromechanical transducer field of electricity.
Background technology
Internal magnetic loudspeaker has obtained using extremely widely in PC multimedia loudspeaker box, notebook computer, high-fidelity headphone, radio communication machine, TV and a lot of audio-visual equipment.The stray field intensity that its maximum characteristics are these loud speaker peripheries is very little.Method commonly used is the inside that permanent magnet is placed in the ferromagnetism loop, makes full use of the magnetic screening action of outside ferromagnetic circuit and steel speaker frame, in order to avoid influence the operate as normal of CRT monitor, IC integrated circuit and other components and parts.
Fig. 1 shows so far still at widely used a kind of typical internal magnetic loudspeaker driver magnetic circuit sectional arrangement drawing.The horizontal bottom crown that it has two permanent magnets 2 and 4, blocks of T iron 3 tightly coincide the N utmost point pole-face of two block permanent magnets together.Uncovered 5 and gardens of cylindric magnetic conduction (cover) bowl annular top crown 1 wraps permanent magnet and T iron interior, wherein, the S utmost point pole-face of inner side plane and permanent magnet 4 coincide at the bottom of the cylinder of magnetic conductor bowl 5, the S utmost point pole-face of the inner side plane of top crown 1 and permanent magnet 2 coincide, and constitutes two groups of so-called repulsion type magnetic circuits thus.Between the vertical side face of central axis hole of the cylindrical peripheral face of T iron and top crown 1, form an annular magnetic (gas) crack of loud speaker.A coil rack inserts above-mentioned magnetic gap, is wound with the voice coil loudspeaker voice coil (ignore among the figure and do not paint) that mates with annular magnetic gap on it, constitutes the internal magnetic loudspeaker driver of a double magnetic circuit single-tone circle thus.As seen from Figure 1, this is a kind of internal magnetic loudspeaker driver magnetic circuit of traditional use ferrite permanent-magnet iron.Its major defect is that the ventilation and heat function of built-in magnetic circuit and voice coil loudspeaker voice coil is very poor, bulky, and the very difficult quilt more and more modern audio-visual equipment of miniaturization is admitted.
If ferrite permanent-magnet iron is replaced into the slug type neodium magnet of high energy product and high performance-price ratio, the driver volume of this internal magnetic loudspeaker can dwindle.But because there is the technical characteristic of inner magnet short circuit in the slug type neodium magnet, therefore, they can only be cut into thin thin slice and use.At this moment, T iron is replaced by a cylindric conducting magnetic column and a disk shape pole plate, constitutes a kind of internal magnetic loudspeaker driver of new generation that uses a neodium magnet (not counted secondary magnetic) to have a magnetic gap and voice coil loudspeaker voice coil simultaneously thus.Their volume has obtained significantly dwindling, and weight is also very light.But, owing to have only a magnetic gap and voice coil loudspeaker voice coil, this generation internal magnetic loudspeaker is the same with older generation's internal magnetic loudspeaker: have inevitable phase distortion and second harmonic distortion between electroacoustic recovering signal and the source of sound, electro-acoustic conversion efficiency is still on the low side, be enclosed in the magnetic loop in the magnetic bowl (magnetic cover) and the heat dissipation ventilation problem of voice coil loudspeaker voice coil and still do not obtain adequate solution, the air damping that airtight magnetic gap back cavity produces the voice coil loudspeaker voice coil of axial motion and the vibrational system that is connected together, make the transient response deterioration of loud speaker, further have influence on the electroacoustic reduction quality of loud speaker.
So, use the neodymium iron boron internal magnetic loudspeaker of new generation of closed magnetic bowl in small-bore loud speaker, to be applied, in vast sound equipment audiovisual field, still be severely limited.
In the prior art, CN1347628A (PCT/GB00/01484) provides a kind of Drive technology scheme that does not re-use the inner magnetic transducer of closed magnetic bowl, its weak point is: this patent application does not have fully to disclose described at least one pair of coil and reaches the overall technical architecture that related with it magnetic circuit promptly constitutes moving coil driver, lacks essential annexation and corresponding technical characterictic between the main components and parts of driver yet.And on the whole, this technical scheme has fallen into the coverage of prior art CN2333135Y and PCT/CN98/00306 (WO99/31931).In addition, method and the conclusion that adopts the Welsby formula to calculate the loudspeaker coil inductance value with permanent magnet loop unshakable in one's determination in this patent application also is cannot stand.
In the prior art, US5,748,760 (PCT/US95/14696 WO96/33592) also provides a kind of twin coil driver closed magnetic bowl, that have multifunctional frame (Dual coil drive with multipurpose housing) technical scheme of not using.Its weak point is: because previous reasons, the thickness of slug type neodium magnet and diameter ratio are no more than 0.2～0.3 usually, therefore, when the preceding pole plate of transducer driver adopts conventional annular flake to cooperate with the neodium magnet thin slice with the back pole plate, the axial stroke of transducer driver is too short, its electro-acoustic conversion efficiency is that the SPL value is compared with conventional products and do not obtained the sort of obvious lifting claimed in this patented technology, and the not skilled worker shape of inefficient high heating still exists.Especially when the high-power bass signal of input, originally the driver coil corresponding to related magnetic gap certainly will move axially dislocation, thereby cause the serious distortion of high-power bass electroacoustic recovering signal, the sense of hearing when participating in the cintest of bass will become shaky unstable with sound.Secondly, on preceding pole plate, neodium magnet, back pole plate, aluminum carriage, central axis hole and a central embolism are set, so as to from the embolism hole, being guided out the technical scheme of transducer driver voice coil loudspeaker voice coil electric wire, only can increase the mounting process complexity and the production cost of loud speaker in the ordinary course of things.At last, what need emphatically point out is: PCT/US95/14696 has overemphasized the invalid heating problem that driver coil/loudspeaker voice coil produces because of impedance and electric current reciprocation, and is indiscreet and negligent because of audible communication signal induct in the ferromagnetism the loop invalid heat energy of eddy current effects output and the ventilation and heat problem that causes thus.This point is a technical barrier of the various internal magnetic loudspeaker magnetic loop main bodys of puzzlement up to now always.
In the prior art, Britain ATC company has developed a kind of mini-SPK of small-bore ultra-long-stroke, a 5 inches loud speakers that for example use in the SCM-10 audio amplifier.Because adopted the design of giant magnet, overlength (thick) magnetic gap, minor circle and ultra-long-stroke, the sound field dynamic effect that these 5 inches loud speakers can reach is enough to match in excellence or beauty with 10 inches woofers.Certainly, ATC SCM-10 audio amplifier has also been paid high cost for this reason: overweight, huge magnet and ultralow efficient (SPL only has 80dB/1w/1m).
In addition, prior art causes industry generally to be assert: the structure of internal magnetic loudspeaker and cost of manufacture are all than outer-magnet speaker height.And implementation result of the present utility model proves that this is a kind of irrational and technology prejudice that should be corrected rapidly in fact.
The purpose of this utility model is technology prejudice and the weak point that overcomes prior art, and the some kinds of inner magnetic transducer drivers with resistance load characteristics, high sensitivity, high fidelity, small size that use, that central axis hole no longer is set on circular pole plate and neodium magnet of small-bore loud speaker in being suitable for are provided.Second purpose of the present utility model is to provide some kinds to be suitable for the middle heavy caliber loud speaker inner magnetic transducer driver with resistance load characteristics, high sensitivity, high fidelity, small size and good heat radiating ventilation magnetic circuit that use, that central axis hole is set on circular pole plate.The 3rd purpose of the present utility model is, provide some kinds to have the plane phonation board of resistance load characteristics, high sensitivity, high fidelity, small size and suspension type supporting or the inner magnetic transducer driver that plane diaphragm uses, make dynamic planar loudspeakers be reversed change completely because of (phase place) distortion that Multipoint Drive device asynchrony phenomenon causes, the electroacoustic reduction quality of dynamic planar loudspeakers is significantly improved raising.
Undoubtedly, in above-mentioned three kinds of technical schemes that the utility model provides, uniqueness and simple, building material can conform and change the transducer driver carriage that needs and will replace that complex structure and aluminium chassis bulky, that have radiating fin and central embolism in the PCT/US95/14696 technical scheme.
Summary of the invention
The purpose of this utility model is achieved in that
A kind of inner magnetic transducer driver with resistance load characteristics, comprise magnetic circuit and link the all-in-one-piece framework with it, two coaxial annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, the taper shape or the ball that link together with coil rack and elastic damping plate push up shape or planar shaped vibrating diaphragm or plane phonation board, piston motion by coil rack drives described vibrating diaphragm or plane phonation board vibration sounding in air, perhaps detect the sound pressure variations of sound and in coil, sense corresponding audio voltage signal by described vibrating diaphragm, it is characterized in that: the top crown of described magnetic circuit and bottom crown are two coaxial installations and symmetrically arranged circular dull and stereotyped, be provided with the coaxial mounted permanent magnet of the axial charging of uniform uniform thickness more than one or between described top crown and the bottom crown, constitute two coaxial isometrical annular magnetic gaps between the vertical side face with the inner peripheral surface of described top crown and the coaxial mounted cylinder shape magnetic of bottom crown and described top crown and bottom crown, a rigid carriers made from the coaxial mounted nonmagnetic substance of described magnetic circuit, its waist is provided with a uncovered cylinder, inner side plane is provided with an annular groove and is provided with the uniform pore that penetrates more than three thereon at the bottom of it, the inner circular flat surface of described annular groove and exterior annular flat surface that circular platform face coaxial and placed in the middle is with described bottom crown, permanent magnet, the fixing as a whole magnetic circuit of top crown bonding, one and described bottom crown, permanent magnet, the cylinder shape magnetic that top crown matches embeds the inner peripheral surface of described uncovered cylinder, its bottom and described exterior annular flat surface bonding are fixing, its upper end is extended an annular platform that intersects vertically with described cylinder laterally, the outer face of this ring-shaped platform cooperates with described cylinder shape magnetic, and connects to the special framework of described carriage and described transducer as a whole by binding agent or several uniform nonmagnetic substance securing members;
Go into coaxial mounted two coils in described annular magnetic gap interpolation, be provided with corresponding interval between two coils, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
Bisector X---X axis with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described inner magnetic transducer driver has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described inner magnetic transducer is an electromechanical transducer that has resistance load characteristics or be similar to resistance load characteristics.
Described top crown and bottom crown are that a described permanent magnet when not having axis hole circular dull and stereotyped is a disk shape neodium magnet; Described top crown and bottom crown be the annular with central axis hole when dull and stereotyped described permanent magnet be a circular neodium magnet or a fan shape or the disk shape neodium magnet that above uniform thickness is uniform; Described top crown and bottom crown be outer matrix with central axis hole circular when dull and stereotyped described permanent magnet be a circular neodium magnet or a fan shape or the disk shape neodium magnet that above uniform thickness is uniform; Described top crown and bottom crown be one circular dull and stereotyped and near a side of permanent magnet have the diameter suitable with permanent magnet and when the side away from permanent magnet has bigger diameter described permanent magnet be a disk shape or circular neodium magnet.
Described top crown and bottom crown are that the circular dull and stereotyped or outer spill with central axis hole is circular dull and stereotyped, the metal book pipe that nonmagnetic substance is made passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central platform, and relies on specific purpose tool that it two ends is tightly turned over riveting outside described top crown and carriage two on the side plane up and down.
Described top crown and bottom crown are that the circular dull and stereotyped or outer spill with central axis hole is circular dull and stereotyped, the metal section of a nonmagnetic substance making passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central flat table top, the upper and lower end parts of pipeline section is provided with external screw thread, and two nuts that dependence can lock are fixed on described top crown, permanent magnet, bottom crown on the described platform bracket face.
The thickness of described top crown and bottom crown is compared with the thickness of described permanent magnet and is is enough greatly for example equaled or exceeded 1: 1, and described inner magnetic transducer driver is a kind of long stroke or ultra-long-stroke electromechanical transducer.
A kind of inner magnetic transducer driver with resistance load characteristics, comprise magnetic circuit, two coaxial annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, the plane diaphragm or the plane phonation board that link together with coil rack and elastic damping plate, piston motion by coil rack drives described plane diaphragm or plane phonation board vibration sounding in air, perhaps detect the sound pressure variations of sound and in coil, sense corresponding audio voltage signal, it is characterized in that by described plane diaphragm:
The top crown of described magnetic circuit and bottom crown are two coaxial installations and symmetrically arranged circular dull and stereotyped, be provided with the coaxial mounted permanent magnet of the axial charging of uniform uniform thickness more than one or between described top crown and the bottom crown, constitute two coaxial isometrical annular magnetic gaps between the vertical side face with the inner peripheral surface of described top crown and the coaxial mounted cylinder shape magnetic of bottom crown and described top crown and bottom crown, a rigid carriers made from the coaxial mounted nonmagnetic substance of described magnetic circuit, its waist is provided with a uncovered cylinder, inner side plane is provided with an annular groove at the bottom of it, and be provided with the uniform pore that penetrates more than three thereon, the inner circular flat surface of described annular groove and exterior annular flat surface that circular platform face coaxial and placed in the middle is with described bottom crown, permanent magnet, the fixing as a whole magnetic circuit of top crown bonding, one and described bottom crown, permanent magnet, the cylinder shape magnetic that top crown matches embeds the inner peripheral surface of described uncovered cylinder, its bottom and described exterior annular flat surface bonding are fixing, its upper end is extended an annular platform that intersects vertically with described cylinder laterally, the outer face of this ring-shaped platform cooperates with described cylinder shape magnetic, the outer face of an elastic damping plate is bonded to be positioned on the outside horizontal plane of described ring-shaped platform, the axis hole inner face of described elastic damping plate and described coil rack bonding are fixing, the bottom of a cylinder shape coupling piece and described coil rack bonding are fixing, the planar annular of its upper end and described plane diaphragm or plane phonation board bonding are fixing, constitute one thus and are the internal magnetization magnetic circuit that hangs shape;
Go into coaxial mounted two coils in described annular magnetic gap interpolation, be provided with corresponding interval between two coils, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
Bisector X---X axis with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described inner magnetic transducer has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described inner magnetic transducer is an electromechanical transducer that has resistance load characteristics or be similar to resistance load characteristics.
Described top crown and bottom crown are that a described permanent magnet when not having axis hole circular dull and stereotyped is a disk shape neodium magnet; Described top crown and bottom crown be the annular with central axis hole when dull and stereotyped described permanent magnet be a circular neodium magnet or a fan shape or the disk shape neodium magnet that above uniform thickness is uniform.
When described top crown and bottom crown are the circular flat board of circular dull and stereotyped or outer spill with central axis hole, the metal book pipe that nonmagnetic substance is made passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central flat table top, and relies on specific purpose tool that it two ends is tightly turned over riveting outside described top crown and carriage two on the side plane up and down.
When described top crown and bottom crown are the circular flat board of circular dull and stereotyped or outer spill with central axis hole, the metal section of a nonmagnetic substance making passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central flat table top, the upper and lower end parts of pipeline section is provided with external screw thread, and two nuts that dependence can lock are fixed on described top crown, permanent magnet, bottom crown on the described platform bracket face.
The beneficial effects of the utility model:
1, high efficiency.For example, the design people uses the technical scheme that the utility model provides, and has prepared successful SPL up to 3 inches no inductance internal magnetization full range speakers of 92dB/1w/1m and SPL 5 inches no inductance internal magnetization full range speakers up to 94.5dB/1w/1m.Start with from increasing substantially efficient, solved at one stroke technical barriers such as the poor efficiency that perplexs traditional internal magnetic loudspeaker many decades, high heating and ventilation and heat be bad.Under bore, the material situation suitable with the electroacoustic techniques index, the efficient of more traditional internal magnetization electromechanical transducer has improved more than 2～16 times.
2, high fidelity.Can make all kinds of electroacoustic transducer drivers that have resistance load characteristics or be similar to resistance load characteristics, promote the output acoustic pressure of electroacoustic transducer bass end and high audio end significantly, eliminate the phase distortion of transducer and harmonic distortion is reduced to minimum degree.
3, can make all kinds of internal magnetization electromechanical transducers of long stroke or ultra-long-stroke, can fundamentally solve PC multimedia loudspeaker box, notebook computer, high-fidelity headphone, radio communication machine, TV and many audio-visual equipment long-term existence and the electroacoustic failing all the time to overcome reduction low quality and for a long time can not with the technical barrier of electronic technology synchronized development.
4, can make and have high sensitivity and Hi-Fi infrasound of new generation and ultrasonic drilling machine electric transducer.
5, volume is small and exquisite, simple in structure, the ratio of performance to price is high, be easy to implement scale production.
6, overcome traditional technology prejudice, implement successfully to have Magnetic Shielding Effectiveness, and internal magnetization neodymium iron boron loud speaker that price cheaper smaller and more exquisite than external magnetic type neodymium iron boron loud speaker volume.
Description of drawings
Fig. 1 shows traditional internal magnetic loudspeaker driver magnetic circuit sectional arrangement drawing.
Fig. 2 shows the inner magnetic transducer driver driver sectional arrangement drawing of the utility model embodiment 1.
Fig. 3 shows the inner magnetic transducer driver sectional arrangement drawing of the utility model embodiment 2.
Fig. 4 shows the inner magnetic transducer driver sectional arrangement drawing of the utility model embodiment 3.
Fig. 5 shows the inner magnetic transducer driver sectional arrangement drawing of the utility model embodiment 4.
Fig. 6 shows the driver magnetic circuit inner core sectional arrangement drawing of the utility model embodiment 5.
The utility model main element and label corresponding relation are as follows:
Pole-face---300,700,800,900,1100;
Permanent magnet---302,702,802,902,1102;
Top crown---303A, 703A, 803A, 903A, 1103A;
Bottom crown---303B, 703B, 803B, 903B, 1103B;
Vibrating diaphragm----377,777,877,977,1177;
Elastic damping plate----341,741,841,941,1141;
Coil rack----307,707,807,907,1107;
Coil----309,709,809,909,1109;
Annular groove----3631,7631,8631,9631,11631;
Annular groove inner side plane----3630,7630,8630,9630,11630;
Annular magnetic gap----310,710,810,910,1110;
The cylinder shape magnetic---313,713,813,913,1113;
Carriage---381,781,881,981,1181;
Carriage penetrates pore--and-382,782,882,982,1182;
Carriage exterior annular platform---3811,7811,8811,9811,11811;
Carriage exterior annular platform outside horizontal plane----3810,7810,8810,9810,11810;
The inboard vertical mounting plane----3820,7820,8820,9820,11820 of carriage cylinder;
Carriage inner concave platform face----3118,7118,8118,9118,1118;
Carriage mounting plane----3800,7800,8800,9800,11800;
Nonmagnetic substance tubular fastener----860,960,1160;
Nonmagnetic substance pipe nut----866,966;
Binding agent-----001
Cylinder shape coupling piece------7000,11000;
Embodiment
Embodiment is further elaborated the utility model below with reference to accompanying drawing.
Fig. 2 shows the inner magnetic transducer driver sectional arrangement drawing of the utility model embodiment 1.
Present embodiment is the internal magnetization driver embodiment of a dynamic planar loudspeakers.The top crown 703A of loud speaker and bottom crown 703B are two does not have the circular dull and stereotyped of axis hole, and it uses electrical pure iron or other magnetic conductivity iron and steel to make usually.Coaxial mounted disk shape neodium magnet 702 bonded being positioned between two circular dull and stereotyped pole-faces 700.In described top crown 703A and bottom crown 703B and permanent magnet 702 are enclosed in by a coaxial mounted cylinder shape magnetic 713, its height and the related cooperation of top crown 703A and bottom crown 703B.Constitute two described annular magnetic gap 710A and 710B between the inboard vertical plane of cylinder shape magnetic 713 and the circular dull and stereotyped periphery vertical plane.A described carriage 781 that forms with top crown 703A, permanent magnet 702, bottom crown 703B, cylinder shape magnetic 713 coaxial mounted use aluminium alloys or engineering plastics die casting, its central part is provided with an inner concave platform face 7118; Be provided with a coaxial annular groove 7631 in the outside of described inner concave platform face 7118, side plane 7800, cylinder shape magnetic 713 bottom external profile surfaces and the vertical external profile surface fixing carriage mounting plane 7820 that coincide mutually outside the outside of described annular groove 7631 is provided with coaxial and a described bottom crown.The upper end of described carriage is extended an annular platform 7811 laterally, and this annular platform 7811 intersects vertically with the uncovered cylinder of described carriage 781, forms the outside horizontal plane 7810 of annular platform thus.Cylinder shape magnetic 713 pushes in the vertical mounting plane 7820 that is inlaid in carriage 781 and bonded location by the uncovered position of described carriage 781, and top crown 703A, permanent magnet 702 and bottom crown 703B then use binding agent and carriage inner concave platform face 7118 bondings to fix.
In described annular magnetic gap 710, insert a described coil rack 707, be wound with described coil 709A and 709B on it.The outside horizontal plane 7810 bonding location of the outside end face of an elastic damping plate 741 and the exterior annular platform 7811 of carriage 781, the axis hole inner face of elastic damping plate 741 is then fixing with coil rack 707 bondings.At the cylinder shape coupling piece 7000 of being cast by engineering plastics in the inside top bonding location of coil rack, its outside horizontal plane and plane phonation board 777 bondings are fixing.Thus, constitute a double-coil double-magnet gap panel speaker internal magnetization driver with suspension type supporting.It has a pair of with laterally zygomorphic described magnetic circuit of X---X axis and described circuit.If with the left side magnetic circuit of Fig. 2 dynamic planar loudspeakers central axial line is example, the permanent-magnet line is via following element number: the S utmost point of 702 the N utmost point → 703A → 710A → 709A → 710A → 713 → 710B → 709B → 710B → 703B → 702 and constitute a closed magnetic circuit.Compare with the ring plate and the T iron circuit of conventional loudspeakers, the utility model has omitted the T iron parts with magnetic line of force direction conversion an angle of 90 degrees, thereby the equivalent inductance of magnetic circuit, equivalent magnetic resistance and leakage flux all reduce significantly, and the electro-acoustic conversion efficiency of loud speaker can be improved significantly.
Be example with Fig. 2 loud speaker central axial line left side magnetic circuit still: the permanent-magnet line passes through the coil 709A in the magnetic gap from right to left among the last magnetic gap 710A, the permanent-magnet line passes through the coil 709B in the magnetic gap from left to right among the following magnetic gap 710B, and the magnetic line of force direction in two magnetic gaps just differs 180 degree phase angles up and down.Therefore, when looking fashionable from vibrating diaphragm 777 directions, as long as two coil 709A of regulation and 709B around on the contrary, for example coil 709A for clockwise around to coil 709B be the inhour around to, Lorentz force principle according to electricity, as the same work moment that above-mentioned two coils are connected tone currents, the electric power F that coil 709A produces
AElectric power F with coil 709B generation
BDirection identical, the electric power F=F of loudspeaker coil
A+ F
BWhen tone currents is anti-phase, electric power F
A, F
BDirection also opposite, this moment loud speaker electric power F=F
A+ F
BEquation remain unchanged, the direction of the F that just makes a concerted effort is opposite.
This shows, the simplest mode of connection of present embodiment loudspeaker coil circuit is that coil 709A is connected with coil 709B reverse parallel connection, at this moment, the equivalent inductance of loud speaker reduces by 1/2nd because of coils from parallel connection of coils work, and its impedance---frequency response curve is compared with traditional unicoil loud speaker and significantly improved.
The utlity model has resistance load characteristics in order to make, the setting prerequisite of present embodiment is: symmetrically arranged transducer driver top crown 703A has identical material and geometry with bottom crown 703B; Geometry and the magnetic induction density B of two described annular magnetic gap 710A and 710B
rValue equates; Two coil 709A and 709B around to opposite (coil for clockwise around to, another coil be counter-clockwise around to); The enamelled wire cross-sectional area of two coils equates; The equal turn numbers of two coils is n
A=n
BThe inductance value absolute value of two coils is equal | L
709A|=| L
709B|.In brief, promptly 1/2nd bisector X-X axis with described permanent magnet 702 axial heights are horizontal symmetry axis, described transducer driver have a pair of aspect geometry and magnetic property laterally zygomorphic work magnetic circuit and coil circuit.According to the regulation principle of Lorentz force, with the tail end Y of coil 709A
AHead end X with coil 709B
BBe connected in series the head end X of coil 709A
ATail end Y with coil 709B
BConstitute a pair of signal input terminal of described transducer driver.Because two coil 709A and 709B are operated in the same flux loop, their inductance vector is to cancel each other in 180 degree angles because of phase difference, but the electric power F=F of coil
709A+ F
709BTherefore, described transducer driver has resistance load characteristics or is similar to resistance load characteristics (because the form and position tolerance that is difficult to not have to allow in engineering circle exists), and the phase distortion of dynamic transducer driver, even-order harmonic distortion and secondary back-emf are eliminated or eliminated substantially.
So the dynamic planar loudspeakers internal magnetization driver that present embodiment provides has resistance load characteristics or is similar to resistance load characteristics.
Secondly, because carriage ring groove 7631 and carriage penetrate the existence of pore 782, when bobbin 707 and the vibrational system that is attached thereto were made axially reciprocating, present embodiment dynamic planar loudspeakers driver had transient response characteristic and the result of ventilating heat dissipation better than legacy drive.If the dynamic planar loudspeakers internal magnetization driver that uses 2 to 4 present embodiments to propose, they just can overcome the Multipoint Drive device asynchronous working situation that the conventional planar loudspeaker drive causes because of the inductance value that has inductance value or each driver there are differences each other after series, parallel or connection in series-parallel connection.Therefore, present embodiment is to the fidelity, the sensitivity that improve dynamic planar loudspeakers with improve the high audio upper limit and bass lower limit aspect will produce extremely rare effect.
Fig. 3 shows the inner magnetic transducer driver sectional arrangement drawing of the utility model embodiment 2.
Different with the inventive embodiments 1 shown in Fig. 2: the described top crown 1103A of the dynamic planar loudspeakers internal magnetization driver that Fig. 3 provides and bottom crown 1103B are be provided with a central axis hole circular dull and stereotyped, described permanent magnet 1102 is annular neodium magnets that are provided with central axis hole, the carriage inner concave platform position placed in the middle of described non magnetic pallet 1181 also is provided with a central axis hole that matches, and the metal light wall pipe 1160 that nonmagnetic substance is made passes described top crown 1103A, permanent magnet 1102, the central axis hole of bottom crown 1103B and with this magnetic circuit inner core tightly riveting on the inner concave platform face 11800 of non magnetic carriage 1181.Described metal light wall pipe 1160 can be a copper pipe or aluminum pipe, and they have good heat-conductive characteristic, turns over the riveter skill riveting anchor clamps that then can expand by the pipeline of special use.Certainly, in order to ensure the assembling intensity of magnetic circuit inner core, still can use binding agent together between described top crown 1103A, permanent magnet 1102, bottom crown 1103B and the described carriage 1181 with their tight bond.
Self-evident, the existence of described nonmagnetic metal light wall pipe 1160 not only can improve the heat dissipating state of top crown 1103A and bottom crown 1103B, and the pipeline of mesopore can also provide the heat loss through convection passage of a cold and hot air that a strong passage that reduces vibrating diaphragm back cavity air damping and then improve the loud speaker transient response is provided simultaneously.Undoubtedly, for the loud speaker with taper shape or ball top shape or plane diaphragm, such improvement all is vital to the electroacoustic reduction quality and the functional reliability of loud speaker.
Other implementation detail of relevant present embodiment 2 sees also the tabulation of the explanation of the utility model Fig. 2 embodiment 1 and the utility model main element and label corresponding relation and no longer gives repetition.
Fig. 4 shows the inner magnetic transducer driver sectional arrangement drawing of the utility model embodiment 3.
The described top crown 803A of the internal magnetization driver that Fig. 4 provides and bottom crown 803B are the outer spill annulus flat boards that is provided with a central axis hole, described permanent magnet 802 is annular neodium magnets that are provided with central axis hole, the carriage inner concave platform position placed in the middle of described non magnetic pallet 881 also is provided with a central axis hole that matches, the tubular fastener 860 that nonmagnetic substance is made is passed described top crown 803A, permanent magnet 802, bottom crown 803B, the central axis hole of carriage inner concave platform 8118, dependence is arranged on external screw thread and two nonmagnetic substance pipe nuts 866 at described nonmagnetic substance securing member 860 both ends, and the described magnetic circuit inner core of present embodiment is fixed on the inner concave platform face 8118 of nonmagnetic substance carriage 881 tightly.In order to ensure the assembling intensity of described magnetic circuit inner core, still can use binding agent that they are closely bonded together between the inner concave platform 8118 of described top crown 803A, permanent magnet 802, bottom crown 803B and described carriage 881.Described tubular fastener 860 is a non-magnetic stainless steel tube or copper pipe in the present embodiment, and described pipe nut 866 is non-magnetic stainless rust or copper nut and has mechanical self-locking device or the spring lock washer.Different with aforementioned two embodiment, the described top crown 803A of the utility model embodiment 3 and the thickness of bottom crown 803B are compared with described permanent magnet 802, have thicker magnetic gap height (comparing more than or equal to 1: 1 with the thickness of permanent magnet) and bigger circle diameter.Recessed structure was steel and the weight reduction in order to save magnetic pole plate outside described top crown 803A, bottom crown 803B adopted.Described coil 809A and 809B be by this figure as seen: the thickness of the described upper and lower pole plate of related cooperation with it is compared and is obviously lacked partially, therefore, the such scheme that utilizes present embodiment 3 to provide, we may be embodied to a series of similar ATC of merit company, have resistance load characteristics or be similar to internal magnetic loudspeaker of new generation resistance load characteristics, small and exquisite, the high sensitivity of overlength linear stroke, volume, high-fidelity and larger caliber.For example, when bore reached 10 inches, its sound field dynamic range was enough to match in excellence or beauty with one 15 inches woofer, then can reach more than the 95dB/1w/1m easily but electro-acoustic conversion efficiency is the SPL value.
As for other implementation detail of present embodiment 3, see also the tabulation of the explanation of the utility model Fig. 2 embodiment 1 and Fig. 3 embodiment 2 and the utility model main element and label corresponding relation and no longer give repetition.
Fig. 5 shows the inner magnetic transducer driver sectional arrangement drawing of the utility model embodiment 4.
The described top crown 903A of the internal magnetization driver that Fig. 5 provides and bottom crown 903B are be provided with central axis hole circular dull and stereotyped, and described permanent magnet 902 also is the annular neodium magnet that is provided with central axis hole.The ratio of the thickness of described top crown 903A and bottom crown 903B and the thickness of described permanent magnet 903 was more than or equal to 1: 1, therefore, present embodiment 4 provide a kind of have long stroke or ultra-long-stroke, have resistance load characteristics or be similar to the internal magnetization electromechanical transducer of resistance load characteristics.
As for other implementation detail of present embodiment 4, see also the tabulation of the explanation of the utility model Fig. 2 embodiment 1 and Fig. 3 embodiment 2 and Fig. 4 embodiment 3 and the utility model main element and label corresponding relation and no longer give repetition.
Fig. 6 shows the driver magnetic circuit inner core sectional arrangement drawing of the utility model embodiment 5.
Different with previous embodiment is: the top crown 303A of present embodiment 5 regulations and bottom crown 303B are two does not have the circular dull and stereotyped of axis hole, but described top crown 303A has two different diameters on axial height, wherein, inboard pole plate diameter partly near permanent magnet 302 is less, and cooperates with the diameter of permanent magnet 302 is interrelated; That part of pole plate near the outside then has bigger diameter, thereby forms an evagination antelabium 3031 on described top crown, and its outer side plane is concordant with the outer side plane of top crown described in the utility model.Its vertical outer peripheral face only occupies a less part in the top crown 303A thickness, and the central axial line of its inboard horizontal plane and described top crown 303A intersects vertically.Bottom crown 303B is a symmetry axis with the X---X axis of permanent magnet 1/2 axial height described in the utility model, forms symmetrical structure with top crown 303A.Thus, the axial width ratio of present embodiment described top crown of 5 formations and described bottom crown thickness and permanent magnet thickness equaled or exceeded 1: 1 and suitable another kind of long stroke or ultra-long-stroke inner magnetic transducer driver magnetic circuit inner core as long voice coil, short magnetic gap.Usually, the difference of two different-diameters of described top crown of present embodiment or described bottom crown is not more than 0.5～6 millimeter.
It is to be noted at last: utilize all the magnetic structure patterns shown in the utility model Fig. 1 to Fig. 6, different top crown and bottom crown, different permanent magnets, different carrier structures, the cylinder shape magnetic of varying cross-section shape, and different driver coil connected modes, can permutation and combination become various dissimilar internal magnetization electromechanical transducer drivers.Though the utility model can't be enumerated out one by one with all these embodiment, but, no matter will above-mentioned technical characterictic of the present utility model permutation and combination even make such or such local modification how, their overall technological scheme and invention core content all can't surmount whole coverages that the utility model claim and this specification have proposed.
Claims (9)
1. inner magnetic transducer driver with resistance load characteristics, comprise magnetic circuit and link the all-in-one-piece framework with it, two coaxial annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, the taper shape or the ball that link together with coil rack and elastic damping plate push up shape or planar shaped vibrating diaphragm or plane phonation board, piston motion by coil rack drives described vibrating diaphragm or plane phonation board vibration sounding in air, perhaps detect the sound pressure variations of sound and in coil, sense corresponding audio voltage signal, it is characterized in that by described vibrating diaphragm:
The top crown of described magnetic circuit and bottom crown are two coaxial installations and symmetrically arranged circular dull and stereotyped, be provided with the coaxial mounted permanent magnet of the axial charging of uniform uniform thickness more than one or between described top crown and the bottom crown, constitute two coaxial isometrical annular magnetic gaps between the vertical side face with the inner peripheral surface of described top crown and the coaxial mounted cylinder shape magnetic of bottom crown and described top crown and bottom crown, a rigid carriers made from the coaxial mounted nonmagnetic substance of described magnetic circuit, its waist is provided with a uncovered cylinder, inner side plane is provided with an annular groove and is provided with the uniform pore that penetrates more than three thereon at the bottom of it, the inner circular flat surface of described annular groove and exterior annular flat surface that circular platform face coaxial and placed in the middle is with described bottom crown, permanent magnet, the fixing as a whole magnetic circuit of top crown bonding, one and described bottom crown, permanent magnet, the cylinder shape magnetic that top crown matches embeds the inner peripheral surface of described uncovered cylinder, its bottom and described exterior annular flat surface bonding are fixing, its upper end is extended an annular platform that intersects vertically with described cylinder laterally, the outer face of this ring-shaped platform cooperates with described cylinder shape magnetic, and connects to the special framework of described carriage and described transducer as a whole by binding agent or several uniform nonmagnetic substance securing members;
Go into coaxial mounted two coils in described annular magnetic gap interpolation, be provided with corresponding interval between two coils, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
Bisector X-X axis with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described inner magnetic transducer driver has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described inner magnetic transducer is an electromechanical transducer that has resistance load characteristics or be similar to resistance load characteristics.
2. according to the inner magnetic transducer driver of claim 1 regulation, it is characterized in that: described top crown and bottom crown are that a described permanent magnet when not having axis hole circular dull and stereotyped is a disk shape neodium magnet; Described top crown and bottom crown be the annular with central axis hole when dull and stereotyped described permanent magnet be a circular neodium magnet or a fan shape or the disk shape neodium magnet that above uniform thickness is uniform; Described top crown and bottom crown be outer matrix with central axis hole circular when dull and stereotyped described permanent magnet be a circular neodium magnet or a fan shape or the disk shape neodium magnet that above uniform thickness is uniform; Described top crown and bottom crown be one circular dull and stereotyped and near a side of permanent magnet have the diameter suitable with permanent magnet and when the side away from permanent magnet has bigger diameter described permanent magnet be a disk shape or circular neodium magnet.
3. according to the inner magnetic transducer driver of claim 1 or claim 2 regulation, it is characterized in that: described top crown and bottom crown are that the circular dull and stereotyped or outer spill with central axis hole is circular dull and stereotyped, the metal book pipe that nonmagnetic substance is made passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central platform, and relies on specific purpose tool that it two ends is tightly turned over riveting outside described top crown and carriage two on the side plane up and down.
4. according to the inner magnetic transducer driver of claim 1 or claim 2 regulation, it is characterized in that: described top crown and bottom crown are that the circular dull and stereotyped or outer spill with central axis hole is circular dull and stereotyped, the metal section of a nonmagnetic substance making passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central flat table top, the upper and lower end parts of pipeline section is provided with external screw thread, and two nuts that dependence can lock are fixed on described top crown, permanent magnet, bottom crown on the described platform bracket face.
5. according to the inner magnetic transducer driver of claim 1 or claim 2 regulation, it is characterized in that: the thickness of described top crown and bottom crown is compared with the thickness of described permanent magnet and is is enough greatly for example equaled or exceeded 1: 1, and described inner magnetic transducer driver is a kind of long stroke or ultra-long-stroke electromechanical transducer.
6. inner magnetic transducer driver with resistance load characteristics, comprise magnetic circuit, two coaxial annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, the plane diaphragm or the plane phonation board that link together with coil rack and elastic damping plate, piston motion by coil rack drives described plane diaphragm or plane phonation board vibration sounding in air, perhaps detect the sound pressure variations of sound and in coil, sense corresponding audio voltage signal, it is characterized in that by described plane diaphragm:
The top crown of described magnetic circuit and bottom crown are two coaxial installations and symmetrically arranged circular dull and stereotyped, be provided with the coaxial mounted permanent magnet of the axial charging of uniform uniform thickness more than one or between described top crown and the bottom crown, constitute two coaxial isometrical annular magnetic gaps between the vertical side face with the inner peripheral surface of described top crown and the coaxial mounted cylinder shape magnetic of bottom crown and described top crown and bottom crown, a rigid carriers made from the coaxial mounted nonmagnetic substance of described magnetic circuit, its waist is provided with a uncovered cylinder, inner side plane is provided with an annular groove at the bottom of it, and be provided with the uniform pore that penetrates more than three thereon, the inner circular flat surface of described annular groove and exterior annular flat surface that circular platform face coaxial and placed in the middle is with described bottom crown, permanent magnet, the fixing as a whole magnetic circuit of top crown bonding, one and described bottom crown, permanent magnet, the cylinder shape magnetic that top crown matches embeds the inner peripheral surface of described uncovered cylinder, its bottom and described exterior annular flat surface bonding are fixing, its upper end is extended an annular platform that intersects vertically with described cylinder laterally, the outer face of this ring-shaped platform cooperates with described cylinder shape magnetic, the outer face of an elastic damping plate is bonded to be positioned on the outside horizontal plane of described ring-shaped platform, the axis hole inner face of described elastic damping plate and described coil rack bonding are fixing, the bottom of a cylinder shape coupling piece and described coil rack bonding are fixing, the planar annular of its upper end and described plane diaphragm or plane phonation board bonding are fixing, constitute one thus and are the internal magnetization magnetic circuit that hangs shape;
Go into coaxial mounted two coils in described annular magnetic gap interpolation, be provided with corresponding interval between two coils, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
Bisector X---X axis with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described inner magnetic transducer has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described inner magnetic transducer is an electromechanical transducer that has resistance load characteristics or be similar to resistance load characteristics.
7. according to the inner magnetic transducer driver of claim 6 regulation, it is characterized in that: described top crown and bottom crown are that a described permanent magnet when not having axis hole circular dull and stereotyped is a disk shape neodium magnet; Described top crown and bottom crown be the annular with central axis hole when dull and stereotyped described permanent magnet be a circular neodium magnet or a fan shape or the disk shape neodium magnet that above uniform thickness is uniform.
8. according to the inner magnetic transducer driver of claim 6 or claim 7 regulation, it is characterized in that: when described top crown and bottom crown are the circular flat board of circular dull and stereotyped or outer spill with central axis hole, the metal book pipe that nonmagnetic substance is made passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central flat table top, and relies on specific purpose tool that it two ends is tightly turned over riveting outside described top crown and carriage two on the side plane up and down.
9. according to the inner magnetic transducer driver of claim 6 or claim 7 regulation, it is characterized in that: when described top crown and bottom crown are the circular flat board of circular dull and stereotyped or outer spill with central axis hole, the metal section of a nonmagnetic substance making passes the axis hole of described top crown, permanent magnet, bottom crown, carriage central flat table top, the upper and lower end parts of pipeline section is provided with external screw thread, and two nuts that dependence can lock are fixed on described top crown, permanent magnet, bottom crown on the described platform bracket face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520035371 CN2822084Y (en) | 2005-09-06 | 2005-09-06 | Inner magnet type energy changer driver with resistance negative load property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520035371 CN2822084Y (en) | 2005-09-06 | 2005-09-06 | Inner magnet type energy changer driver with resistance negative load property |
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| Publication Number | Publication Date |
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| CN2822084Y true CN2822084Y (en) | 2006-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520035371 Expired - Fee Related CN2822084Y (en) | 2005-09-06 | 2005-09-06 | Inner magnet type energy changer driver with resistance negative load property |
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| Country | Link |
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| CN (1) | CN2822084Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741683B (en) * | 2004-08-06 | 2011-11-16 | 张凡 | Inner magnetic transducer driver with resistance load characteristics |
| CN102905214A (en) * | 2011-07-25 | 2013-01-30 | 张凡 | Driver of double-magnet double-magnetic-gap double-coil transducer |
| CN103874004A (en) * | 2012-12-12 | 2014-06-18 | 谢振辉 | Microphone |
| CN104661161A (en) * | 2013-11-21 | 2015-05-27 | 哈曼国际工业有限公司 | Inverted dual coil transducer |
| US9294843B2 (en) | 2007-10-13 | 2016-03-22 | Fan Zhang | Multimedia acoustics system having audio frequency digital interface |
| CN105744413A (en) * | 2014-12-31 | 2016-07-06 | 骷髅头有限公司 | Audio driver assemblies, headphones including the audio driver assemblies, and related methods |
-
2005
- 2005-09-06 CN CN 200520035371 patent/CN2822084Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741683B (en) * | 2004-08-06 | 2011-11-16 | 张凡 | Inner magnetic transducer driver with resistance load characteristics |
| US9294843B2 (en) | 2007-10-13 | 2016-03-22 | Fan Zhang | Multimedia acoustics system having audio frequency digital interface |
| CN102905214A (en) * | 2011-07-25 | 2013-01-30 | 张凡 | Driver of double-magnet double-magnetic-gap double-coil transducer |
| CN103874004A (en) * | 2012-12-12 | 2014-06-18 | 谢振辉 | Microphone |
| CN104661161A (en) * | 2013-11-21 | 2015-05-27 | 哈曼国际工业有限公司 | Inverted dual coil transducer |
| CN104661161B (en) * | 2013-11-21 | 2020-01-21 | 哈曼国际工业有限公司 | Inverted double-coil transducer |
| CN105744413A (en) * | 2014-12-31 | 2016-07-06 | 骷髅头有限公司 | Audio driver assemblies, headphones including the audio driver assemblies, and related methods |
| CN105744413B (en) * | 2014-12-31 | 2019-01-22 | 骷髅头有限公司 | Audio driven device assembly, headphone including audio driven device assembly and associated method |
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Granted publication date: 20060927 Termination date: 20130906 |