CN104219606A - Ultra-long magnetic field moving-coil speaker - Google Patents
Ultra-long magnetic field moving-coil speaker Download PDFInfo
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Abstract
The invention discloses an ultra-long magnetic field moving-coil speaker comprising a frame, a magnetic circuit system and a vibrating system. The magnetic circuit system comprises an upper clamp plate, a lower clamp plate, a core and a magnet; a magnetic gap forms between the inside of a center hole of the upper clamp plate and the outside of the upper end of the core; the vibrating system comprises a voice coil, a damper and a paper cone; the lower end of the voice coil is inserted into the magnetic gap; the voice coil is 1-32ohm in impedance; the diameter of the frame is defined as R, and the thickness of the upper clamp plate is defined as H; the diameter R of the frame and the thickness H of the upper clamp plate meet the specific conditions. The ultra-long magnetic field moving-coil speaker has the advantages that the greater length of the magnetic cap ensures that the diameter of the voice coil needs to be increased on the premise of ensuring impedance uniformity, the length of a conductor of the voice coil in the magnetic field is increased as the diameter of the voice coil is increased, the longer a coil winding in the magnetic field, the higher the kinetic energy produced by the injected audio current of the magnetic circuit system, cutting magnetic lines of force, and the higher the efficiency; the length of the magnetic cap is increased, relative displacement ratio of the voice coil in the magnetic field is decreased, and distortion can be effectively decreased.
Description
Technical field
The present invention relates to a kind of coil-moving speaker, especially relate to a kind of overlength magnetic field coil-moving speaker.
Background technology
Coil-moving speaker is by magnetic circuit system, vibrational system and auxiliary system composition.The basic magnetic circuit system of coil-moving speaker (coil-moving speaker of magnetic structure is example in addition, as follows) forms primarily of train wheel bridge, lower plate, iron core and magnet.The centre position seamless link cylinder-shaped iron core of annular lower plate, goes into T iron component; T iron component upper end glues together annular magnet and annular train wheel bridge respectively, forms the magnetic circuit system of the DYN dynamic loud speaker of outer magnetic of most basic structure.Annulus (abbreviation magnetic gap) corresponding with outside iron core upper end inside annular train wheel bridge mesopore in magnetic circuit system, just defines available coil-moving speaker magnetic field.Magnetic field width depends on the mesopore of train wheel bridge and the difference of iron core external diameter, and the length in magnetic field is that the thickness of train wheel bridge adds that magnetic gap meets the distance of certain magnetic field intensity up and down.Under equal conditions, magnetic gap is less, and magnetic field intensity is stronger, otherwise more weak.
The vibrational system of coil-moving speaker is primarily of compositions such as voice coil loudspeaker voice coil, latch plate, vibrating diaphragm (cone) and dust caps.The windings section of circular voice coil is positioned at the center of coil-moving speaker magnetic circuit system magnetic gap, stent outer around voice coil loudspeaker voice coil has connected the latch plate of the effect of moving up and down when fixing and maintain voice coil loudspeaker voice coil work, mesopore upper end connects cone, cone mesopore upper end is connected dust cap with the top of voice coil suspension junction, and cone limit will connect with frame limit.When voice coil loudspeaker voice coil lead-out wire two ends accessing to audio power signal, the voice coil loudspeaker voice coil winding Injection Current in magnetic field, by cutting magnetic line produce upper or under kinetic energy.When the signal frequency injected is higher, the frequency of voice coil loudspeaker voice coil up-down vibration is faster; The signal injected is stronger, and the amplitude of voice coil loudspeaker voice coil up-down vibration is larger (kinetic energy that cutting magnetic line produces is larger).The cone be connected on voice coil loudspeaker voice coil also can vibrate along with the generation up and down of voice coil loudspeaker voice coil, and the cone of vibration passes through sound propagating medium-----air and produces sound.Usedly have in design traditional, consider the matching relationship of basic characteristics in loudspeaker design and magnetic circuit system and vibrational system, and the weight, production cost etc. of power, Frequency Response, loud speaker are considered, the design of coil-moving speaker has following characteristics:
1, under equal conditions, magnetic field " intensity " can be utilized larger, the kinetic energy injecting the generation of tone currents cutting magnetic line is larger, otherwise less.But after magnetic field intensity exceeds certain limit, the signal lower to frequency can play restriction, is unfavorable for the reduction of low frequency.
2, under equal conditions, magnetic circuit system can utilize voice coil loudspeaker voice coil winding length in magnetic field longer, and the kinetic energy injecting the generation of tone currents cutting magnetic line is larger.
3, under equal conditions, the tone currents that magnetic circuit system can utilize the voice coil loudspeaker voice coil two ends in magnetic field to inject is larger, and the kinetic energy that cutting magnetic line produces is larger, otherwise less.
4, after audio signal is injected at voice coil loudspeaker voice coil winding two ends, cutting magnetic line in magnetic field can be utilized to produce kinetic energy, form electric energy rotational, then transfer the transformation of acoustic energy to.Do not produce kinetic energy can utilize beyond magnetic field, and produce eddy current along with electric current increases, voice coil loudspeaker voice coil can be caused to generate heat, can cause time serious and burn voice coil loudspeaker voice coil; And the larger distortion of ratio that voice coil loudspeaker voice coil jumps out effective magnetic field is larger.
5, under equal conditions, the lighter efficiency of vibrational system weight is higher, otherwise lower.
In the design of 6, long voice coil voice coil loudspeaker voice coil winding width and effective magnetic field length ratio more higher close to 1.2 efficiency.
7, under equal conditions, voice coil loudspeaker voice coil weight and the larger efficiency of sound film (cone) ratio higher, otherwise lower.
Consider above-mentioned factor, the relation between the specification (the frame diameter of loud speaker) of traditional coil-moving speaker and train wheel bridge thickness meets following table:
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of Frequency Response good, there is higher quality characteristic and the overlength magnetic field coil-moving speaker compared with high sound pressure level.
The present invention solves the problems of the technologies described above adopted technical scheme: 1, a kind of overlength magnetic field coil-moving speaker, comprise frame, magnetic circuit system and vibrational system, described magnetic circuit system comprises train wheel bridge, lower plate, iron core and magnet, between inside the mesopore of described train wheel bridge and outside iron core upper end, there is magnetic gap, described vibrational system comprises voice coil loudspeaker voice coil, play ripple and cone, in the described magnetic gap described in the insertion of voice coil loudspeaker voice coil lower end, the impedance of described voice coil loudspeaker voice coil is 1 ~ 32 ohm, the diameter of definition frame is R, the unit of diameter R is inch, the thickness of train wheel bridge is H, the unit of thickness H is mm, following condition is met between the diameter R of frame and the thickness H of train wheel bridge:
1) when 3<R≤4, then 4<H≤8;
2) when 4<R≤5, then 6<H≤12;
3) when 5<R≤6.5, then 7<H≤14;
4) when 6.5<R≤8, then 8<H≤16;
5) when 8<R≤10, then 9<H≤18;
6) when 10<R≤12, then 10<H≤20;
7) when 12<R≤15, then 12<H≤24;
8) R>15 is worked as, then 15<H≤30.
Following condition is met between the diameter R of described frame and the thickness H of train wheel bridge:
1) when 3<R≤4, then 5<H≤8;
2) when 4<R≤5, then 7<H≤12;
3) when 5<R≤6.5, then 8<H≤14;
4) when 6.5<R≤8, then 9<H≤16;
5) when 8<R≤10, then 10<H≤18;
6) when 10<R≤12, then 12<H≤20;
7) when 12<R≤15, then 14<H≤24;
8) R>15 is worked as, then 18<H≤30.
Following condition is met between the diameter R of described frame and the thickness H of train wheel bridge:
1) as R=4, then H=6,7 or 8
2) as R=5, then H=8,9,10,11 or 12
3) as R=6.5, then H=9,10,11,12,13 or 14
4) as R=7 or 8, then H=10,11,12,13,14,15 or 16
5) as R=9 or 10, then H=11,12,13,14,15,16,17 or 18
6) as R=11 or 12, then H=12,13,14,15,16,17,18,19 or 20
7) when R=13,14 or 15 time, then H=13,14,15,16,17,18,19,20,21,22,23 or 24
8) when R=15,16 or 17 time, then H=16,17,18,19,20,21,22,23,24,25,26,27,28,29 or 30.
Compared with prior art, advantage of the present invention is under the magnetic flux density condition not changing or rationally change coil-moving speaker magnetic circuit system, suitably strengthens the length of magnetic circuit system magnetic gap, can bring following advantage.
1) length of magnetic gap increases, and voice coil loudspeaker voice coil winding can synchronously increase, when ensureing that impedance is consistent, voice coil loudspeaker voice coil wire diameter must increase, and the electric current that during work, voice coil loudspeaker voice coil bears increases, and the power of loud speaker increases, the kinetic energy of generation can be made under equal conditions to increase, improve overall sound pressure level.
2) length of magnetic gap increases, and voice coil loudspeaker voice coil winding synchronously increases, and when ensureing that impedance is consistent, voice coil loudspeaker voice coil wire diameter must increase, and the conductor length of voice coil loudspeaker voice coil in magnetic field increases.Magnetic circuit system can utilize voice coil loudspeaker voice coil winding length in magnetic field longer, and the kinetic energy that the tone currents cutting magnetic line of injection produces is larger, and efficiency is higher.
3) magnetic gap length increases, and voice coil loudspeaker voice coil reduces in magnetic field meta phase shift comparative example, can effectively reduce distortion.
Invention increases the thickness of train wheel bridge, also just define the scope in the utilized magnetic field longer than conventional design, under equal amplitude, voice coil loudspeaker voice coil jumps out the ratio reduction in magnetic field.Reduce " train wheel bridge thickness and voice coil loudspeaker voice coil ratio " if technical measures adjust distortion rationally can not be caused to increase.
Accompanying drawing explanation
Fig. 1 is the structure chart of traditional loud speaker;
Fig. 2 is structure chart of the present invention;
Fig. 3 is the structure chart of traditional magnetic circuit system;
Fig. 4 is the structure chart of magnetic circuit system of the present invention;
Fig. 5 is the frequency response curve comparison diagram () of the present invention and traditional structure loud speaker;
Fig. 6 is the frequency response curve comparison diagram (two) of the present invention and traditional structure loud speaker;
Fig. 7 is the frequency response curve comparison diagram (three) of the present invention and traditional structure loud speaker;
Fig. 8 is the frequency response curve comparison diagram (four) of the present invention and traditional structure loud speaker.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
A kind of overlength magnetic field coil-moving speaker, comprise frame 9, magnetic circuit system and vibrational system, magnetic circuit system comprises train wheel bridge 1, lower plate 2, iron core 3 and magnet 4, have magnetic gap 5 between inside the mesopore of train wheel bridge 1 and outside iron core 3 upper end, vibrational system comprises voice coil loudspeaker voice coil 6, plays ripple 7 and cone 8, and voice coil loudspeaker voice coil 6 lower end is inserted in magnetic gap 5, the impedance of voice coil loudspeaker voice coil 6 is 8 ohm or 4 ohm or 16 ohm or 32 ohm, the diameter of definition frame 9 is R, and the unit of diameter R is inch, and the thickness of train wheel bridge is H; The unit of thickness H is mm;
Following condition is met between the diameter R of frame and the thickness H of train wheel bridge:
1) when 3<R≤4, then 4<H≤8;
2) when 4<R≤5, then 6<H≤12;
3) when 5<R≤6.5, then 7<H≤14;
4) when 6.5<R≤8, then 8<H≤16;
5) when 8<R≤10, then 9<H≤18;
6) when 10<R≤12, then 10<H≤20;
7) when 12<R≤15, then 12<H≤24;
8) R>15 is worked as, then 15<H≤30; R and H can round numbers, and as R=4, then H=6, R and H also can get decimal, as R=3.5, then and H=4.8;
1, essence of the present invention is under the magnetic flux density condition not changing or rationally change coil-moving speaker magnetic circuit system, suitably strengthens the length of magnetic circuit system magnetic gap, can bring following advantage.
1) length of magnetic gap increases, and voice coil loudspeaker voice coil winding can synchronously increase, when ensureing that impedance is consistent, voice coil loudspeaker voice coil wire diameter must increase, and the power that loud speaker bears increases, and the electric current that during work, voice coil loudspeaker voice coil bears increases, the kinetic energy of generation can be made under equal conditions to increase, improve overall sound pressure level.
Test the outer magnetic coil-moving speaker of three sections of 15 cun of 75 cores, except train wheel bridge and voice coil loudspeaker voice coil change, other configurations are substantially the same,
A conventional design train wheel bridge thickness 10.5mm, voice coil loudspeaker voice coil winding 17.5mm, wire diameter 0.35mm, cross-sectional area 0.0962mm
2, by 350W power experiment (powder is made an uproar 8 hours)
B improve after design train wheel bridge thickness 14mm, voice coil loudspeaker voice coil winding 21mm, wire diameter 0.39mm, sectional area of wire 0.1195mm
2, be 1.24 times of conventional voice coil loudspeaker voice coil, successfully passed 450W power experiment (powder is made an uproar 8 hours)
C improve after design train wheel bridge thickness 16mm, voice coil loudspeaker voice coil winding 23mm, wire diameter 0.40mm, sectional area of wire 0.12575mm
2, be 1.31 times of conventional voice coil loudspeaker voice coil, successfully passed 550W power experiment (powder is made an uproar 8 hours)
2) length of magnetic gap increases, voice coil loudspeaker voice coil winding synchronously increases, and when ensureing that impedance is consistent, voice coil loudspeaker voice coil wire diameter must increase, wire diameter increases, the conductor length of voice coil loudspeaker voice coil in magnetic field increases, and magnetic circuit system can utilize voice coil loudspeaker voice coil winding length in magnetic field longer, and the kinetic energy that the tone currents cutting magnetic line of injection produces is larger, efficiency is higher, test the outer magnetic coil-moving speaker of three sections of 15 cun of 75 cores, except train wheel bridge and voice coil loudspeaker voice coil change, other configurations are substantially the same.
A conventional design train wheel bridge thickness 10.5mm, voice coil loudspeaker voice coil winding 17.5mm, wire diameter 0.35mm, can utilize voice coil loudspeaker voice coil winding 97 in magnetic field to enclose, length 23086mm
B improve after design train wheel bridge thickness 14mm, voice coil loudspeaker voice coil winding 21mm, wire diameter 0.39mm, can utilize voice coil loudspeaker voice coil winding 103 in magnetic field to enclose, length 24514mm, be 1.06 times of conventional voice coil loudspeaker voice coil
C improve after design train wheel bridge thickness 16mm, voice coil loudspeaker voice coil winding 23mm, wire diameter 0.40mm, can utilize voice coil loudspeaker voice coil winding 109 in magnetic field to enclose, length 25942mm, be 1.12 times of conventional voice coil loudspeaker voice coil
As can be seen here, the design voice coil loudspeaker voice coil winding after improvement can utilize the wire in magnetic field longer, and efficiency improves.
3) magnetic gap length increases, and voice coil loudspeaker voice coil reduces in magnetic field meta phase shift comparative example, can effectively reduce distortion.
Test the outer magnetic coil-moving speaker of three sections of 15 cun of 75 cores, except train wheel bridge and voice coil loudspeaker voice coil change, other configurations are substantially the same;
A. the upper and lower each 10mm of amplitude, when conventional design train wheel bridge thickness is 10.5mm:
(10.5+10)/10.5＝1.95
B. the upper and lower each 10mm of amplitude, when Curve guide impeller train wheel bridge thickness is 14mm:
(14+10)/14＝1.71
C. the upper and lower each 10mm of amplitude, when Curve guide impeller train wheel bridge thickness is 16mm:
(16+10)/16＝1.62
Oscillation Amplitude after improvement is than reducing, and total distortion reduces
4) magnetic gap length increases, and the design that voice coil loudspeaker voice coil winding/effectively magnetic gap length is smaller can be made to raise the efficiency (most effective during voice coil loudspeaker voice coil winding/effective magnetic gap length=1.2 under equal conditions).
Test the outer magnetic coil-moving speaker of three sections of 15 cun of 75 cores, except train wheel bridge and voice coil loudspeaker voice coil change, other configurations are substantially the same.
A. conventional design train wheel bridge thickness 10.5mm, voice coil loudspeaker voice coil winding 17.5mm, ratio calculated 17.5/10.5=1.667
B. design train wheel bridge thickness 14mm after improving, voice coil loudspeaker voice coil winding 21mm, ratio calculated 21/14=1.5 are lower than conventional design by 0.167
C. design train wheel bridge thickness 23mm after improving, voice coil loudspeaker voice coil winding 16mm, ratio calculated 23/16=1.438 are lower than conventional design by 0.276
The pattern of long voice coil design reduces the ratio of train wheel bridge thickness and voice coil loudspeaker voice coil winding in certain scope, and design result can cause the trend that distortion increases routinely.The design, because increasing the thickness of train wheel bridge technically, also just defines the scope in the utilized magnetic field longer than conventional design, and under equal amplitude, voice coil loudspeaker voice coil jumps out the ratio reduction in magnetic field.Reduce " train wheel bridge thickness and voice coil loudspeaker voice coil ratio " if technical measures adjust distortion rationally can not be caused to increase.
Above-mentioned test case analyzes the conclusion of content, change merely the thickness (improving the length that can utilize magnetic field) of magnetic circuit system clamping plate and simple change vibrational system voice coil loudspeaker voice coil winding, because other configurations are substantially constant, comparativity is more directly perceived simple, so as to proving that overlength magnetic field coil-moving speaker performance has outstanding breakthrough.As done little adjustment in some aspects in practical application, effect will be more obvious.Magnetic circuit system magnetic flux after such as adjustment change, the materials such as the aluminium that voice coil loudspeaker voice coil wire replacing is lighter or copper cover aluminum, increase speech coil framework intensity, increase latch plate displacement and the damping of vibrating diaphragm yoke ring, vibrating diaphragm tapering impregnation reinforcement etc.In conjunction with these changes, effect is more remarkable, and cost performance is higher, and the upgrading expansion particularly for some excellent designs has the effect of getting twice the result with half the effort.
5) the present invention is through tens different modes, the experiment of dissimilar coil-moving speaker machine, enumerates a few money correction data as follows:
6) the present invention is through tens different modes, and the experiment of dissimilar coil-moving speaker machine, proves also have some superiority on frequency response curve, be listed below:
A the outer thick train wheel bridge of magnetic coil-moving speaker FA1501 and 14mm of conventional machine, the thick train wheel bridge of 16mm, only changes the change in train wheel bridge thickness and voice coil loudspeaker voice coil situation.
As seen from Figure 5, model is that 1501 sections of loud speakers are represented by fine dotted line, and the loud speaker of the thick train wheel bridge of 14mm is represented by fine rule, and the loud speaker of the thick train wheel bridge of 16mm is represented by thick line.
Overall sensitivity is substantially constant, and curve is tending towards smooth, and low frequency obviously promotes, and medium-high frequency part slightly declines, but does not affect the Frequency Response after frequency division, is conducive to the tuning after audio amplifier design.
Magnetic coil-moving speaker 12A, 15D in b same specification experiment machine, and import reputable brand 12 cun of 15 cun of loud speakers compare frequency response curve:
From Fig. 6 and Fig. 7, dotted line is the loud speaker of import reputable brand, and solid line is loud speaker of the present invention, and experiment machine Frequency Response is good, and frequency range is wider, and be more tending towards smooth, low frequency characteristic has superiority.
C test 15 cun of 75 core 16mm thick train wheel bridge machine 15A, 16mm thick train wheel bridge machine 15B compares frequency response curve with conventional machine FA12226 and 1507:
From Fig. 8 and Fig. 9, dotted line in Fig. 8 represents the loud speaker of the thick train wheel bridge of 16mm of the present invention, the solid line of Fig. 8 represents that model is the loud speaker of FA1507, dotted line in Fig. 9 is expressed as the loud speaker of the thick train wheel bridge of 16mm of the present invention, it is FA12226 loud speaker that solid line in Fig. 9 is expressed as model, and experiment machine Frequency Response is good, and frequency range is wider, sensitivity is better, and low frequency characteristic is good.
7) length of magnetic gap increases, and is applied in the design of medium and low spectrum loudspeaker, is not only improved the advantages such as product power, has special efficacy to the characteristic in effective utilization and adjustment magnetic field.After the design magnetic field of medium and low spectrum loudspeaker exceeds some strength, can have a negative impact to low frequency and even the lower intermediate-freuqncy signal of frequency, because the suppression of ultrastrong magnetic field is totally unfavorable with performance to the signals revivification that frequency is lower, show that the F0 place peak value on impedance curve is too high, more lower close to F0 place on frequency response curve, the intermediate-frequency section of low frequency and lower frequency does not also come and reduces just to have been lived by powerful magnetically confined, and now sound is thin stiff, lacks charm.Now suitably increase the length that can utilize magnetic field, magnetic field intensity can be adjusted to suitable scope, the increase of the effective magnetic field inside conductor length utilizing the increase of length of magnetic field to cause improves BL characteristic, compensate the loss brought owing to reducing magnetic density, thus making low frequency behavior power stronger, intermediate frequency is more plentiful to have levels.
8) other favorable factors.
A. the vibrational system (or slightly adjusting) followed conventional lines, the length and the adjustment voice coil loudspeaker voice coil winding that increase magnetic circuit system magnetic gap just can increase rated power, and alleviate the weight of vibrational system under being equal to normal condition, efficiency improves.(the lighter efficiency of vibrational system weight is higher)
B. voice coil loudspeaker voice coil winding increases, and voice coil loudspeaker voice coil wire diameter increases, and voice coil loudspeaker voice coil weight increases, and voice coil loudspeaker voice coil/vibrating diaphragm (cone) weight ratio increases, and efficiency improves.(voice coil loudspeaker voice coil/vibrating diaphragm weight ratio is larger, and efficiency is higher)
9) advantage on cost of the present invention.The present invention utilizes most of part of conventional specification loud speaker, when mainly to change train wheel bridge thickness (effective magnetic field length), voice coil loudspeaker voice coil winding width and suitably to adjust other configurations, the power of product is improve with lower cost, improve all many-sided performances of product, obtain more income, be General Promotion value of the product, improve the efficient invention measure of product cost.
Be exemplified below table:
2. use the present invention as phase inverted cabinet the most frequently used at present, have great advantage at raising characteristic value ideal state aspect:
1) one of the advantage of the formula of falling item audio amplifier is, due to the effect of the pipe of falling item, case internal pressure or case external pressure differ little more than audio amplifiers such as sealed type horn-types, are more suitable for the vibrating diaphragm (cone) using lighter in weight, intensity more weak, give full play to the maximum advantage that efficiency is high.
2) overlength magnetic field coil-moving speaker has used this advantage of the formula of falling item audio amplifier just, main feature is the parts utilizing conventional specification, by increasing the length of effective magnetic field and adjusting the technical measures such as voice coil loudspeaker voice coil winding, improve product power and cost performance, particularly continue to use or adjust a little the sound film (cone) continued to use, more rational with weight/power ratio after raising power and other performances, more meet the requirement that phase inverted cabinet is worth vibrating diaphragm (cone) characteristic, have the advantage of perfect pair.
3) overlength magnetic field coil-moving speaker adopts " train wheel bridge/voice coil loudspeaker voice coil winding " smaller design more to meet the design feature of phase inverted cabinet.Adjust rational phase inverted cabinet, at casing F
bplace's amplitude is minimum, and the voice coil loudspeaker voice coil that suitable use winding is less is raised the efficiency.Though the frequency playback time of below FO fires the trend having amplitude to increase rapidly, owing to being that to be in the working stage of work shifts where laborers do not exerting themselves be unavailable.Overlength magnetic field coil-moving speaker fully meets and adapts to this feature of phase inverted cabinet, can perform to ultimate attainment by the advantage of phase inverted cabinet.
4) machine of tens sections of dissimilar different modes of the present invention's experiment, after shaping audio amplifier, tone color is more full clear mellow and full, and low-frequency component increases, and dynamics promotes, and improves tonequality greatly.
Claims (3)
1. an overlength magnetic field coil-moving speaker, comprise frame, magnetic circuit system and vibrational system, described magnetic circuit system comprises train wheel bridge, lower plate, iron core and magnet, between inside the mesopore of described train wheel bridge and outside iron core upper end, there is magnetic gap, described vibrational system comprises voice coil loudspeaker voice coil, plays ripple and cone, in the described magnetic gap described in the insertion of voice coil loudspeaker voice coil lower end, the impedance of described voice coil loudspeaker voice coil is 1 ~ 32 ohm, the diameter of definition frame is R, the unit of diameter R is inch, and the thickness of train wheel bridge is H; The unit of thickness H is mm;
Following condition is met between the diameter R of frame and the thickness H of train wheel bridge:
1) when 3<R≤4, then 4<H≤8;
2) when 4<R≤5, then 6<H≤12;
3) when 5<R≤6.5, then 7<H≤14;
4) when 6.5<R≤8, then 8<H≤16;
5) when 8<R≤10, then 9<H≤18;
6) when 10<R≤12, then 10<H≤20;
7) when 12<R≤15, then 12<H≤24;
8) R>15 is worked as, then 15<H≤30.
2. a kind of overlength magnetic field according to claim 1 coil-moving speaker, is characterized in that meeting following condition between the diameter R of frame and the thickness H of train wheel bridge:
1) when 3<R≤4, then 5<H≤8;
2) when 4<R≤5, then 7<H≤12;
3) when 5<R≤6.5, then 8<H≤14;
4) when 6.5<R≤8, then 9<H≤16;
5) when 8<R≤10, then 10<H≤18;
6) when 10<R≤12, then 12<H≤20;
7) when 12<R≤15, then 14<H≤24;
8) R>15 is worked as, then 18<H≤30.
3. a kind of overlength magnetic field according to claim 2 coil-moving speaker, is characterized in that meeting following condition between the diameter R of frame and the thickness H of train wheel bridge:
1) as R=4, then H=6,7 or 8
2) as R=5, then H=8,9,10,11 or 12
3) as R=6.5, then H=9,10,11,12,13 or 14
4) as R=7 or 8, then H=10,11,12,13,14,15 or 16
5) as R=9 or 10, then H=11,12,13,14,15,16,17 or 18
6) as R=11 or 12, then H=12,13,14,15,16,17,18,19 or 20
7) when R=13,14 or 15 time, then H=13,14,15,16,17,18,19,20,21,22,23 or 24
8) when R=15,16 or 17 time, then H=16,17,18,19,20,21,22,23,24,25,26,27,28,29 or 30.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110933564A (en) * | 2019-11-26 | 2020-03-27 | 歌尔股份有限公司 | Magnetic conductive plate for sound production device and sound production device |
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| JPS56107698A (en) * | 1980-01-30 | 1981-08-26 | Matsushita Electric Ind Co Ltd | Dynamic loudspeaker |
| JPH04196799A (en) * | 1990-11-27 | 1992-07-16 | Matsushita Electric Ind Co Ltd | Electromagnetic induction type speaker |
| CN1111896A (en) * | 1994-11-11 | 1995-11-15 | 陈正宗 | Method for improving property of loudspeaker and double magnetic field double push-pull loudspeaker |
| CN2406437Y (en) * | 1999-07-30 | 2000-11-15 | 上海婕迪贸易有限公司 | Linear long-stroke loudspeaker |
| CN2935688Y (en) * | 2006-07-07 | 2007-08-15 | 常州美欧电子有限公司 | Parallel magnetic structure loudspeaker |
| CN102752694A (en) * | 2012-08-01 | 2012-10-24 | 楼氏电子（北京）有限公司 | Magnetic circuit system and moving-coil type electroacoustic transducer with same |
| CN202889616U (en) * | 2012-10-23 | 2013-04-17 | 宁波音王电声股份有限公司 | Moving-coil loudspeaker |
| CN204131712U (en) * | 2014-08-15 | 2015-01-28 | 宁波音王电声股份有限公司 | A kind of overlength magnetic field coil-moving speaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110933564A (en) * | 2019-11-26 | 2020-03-27 | 歌尔股份有限公司 | Magnetic conductive plate for sound production device and sound production device |
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Address after: 315105 Zhejiang province Ningbo Yinzhou investment and entrepreneurship center 818 integrity Road Applicant after: Audio Limited by Share Ltd Address before: 315104 Yinzhou investment and entrepreneurship center, Ningbo, road, No. 818 Applicant before: Ningbo Soundking Electronic Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141217 |