CN106878888B - Induct dynamic speaker - Google Patents
Induct dynamic speaker Download PDFInfo
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- CN106878888B CN106878888B CN201710227545.XA CN201710227545A CN106878888B CN 106878888 B CN106878888 B CN 106878888B CN 201710227545 A CN201710227545 A CN 201710227545A CN 106878888 B CN106878888 B CN 106878888B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
Abstract
Induct dynamic speaker the present invention relates to one kind, it is technically characterized by comprising the steps as follows: installation induction voice coil among the magnetic gap formed between magnetic conductive splint, the induction voice coil is one and is wound on the end to end multiturn coil for forming closed circuit on speech coil framework, the speech coil framework and sound film bond together with edge in centring disk, the centring disk outer is mounted on the upper end of magnetic conductive board, an excitation coil is wound on the conducting magnetic column of center, the hole that signal feed passes through lower magnetic conductive board is connect with excitation coil, the magnet steel, lower magnetic conductive board, upper magnetic conductive splint is the magnetizer of high permeability and high resistivity.The present invention has rational design, realize the sound-playing function of high linearity, highly sensitive low imbalance, the distortion factor can be significantly reduced applied to Microspeakers such as Mobile phone horn, earphone horns, high-fidelity can be realized for medium-sized loudspeaker, can solve heat dissipation problem applied to supersound projector to improve power margin.
Description
Technical field
Induct dynamic speaker the invention belongs to speaker technology field, especially one kind.
Background technique
Existing dynamic speaker is required to draw from voice coil in two signal lines to frame, the traction shadow of lead-out wire
The flexibility of the sounding effect of resonant film, common fine copper wire net formula lead-out wire can satisfy the requirement of biggish loudspeaker, and
5 inch below for 10w or so miniature loudspeaker, since each of stress makes to dissimilarity when lead-out wire results in the vibration of sound film
It is big to obtain the distortion factor, and since dynamic speaker is when occurring large amplitude sound, since effective length of the voice coil in magnetic field subtracts
The low-frequency distortion degree for resulting in some loudspeakers less reaches 5% to 20%, especially for miniature earphone speaker and mobile phone
Loudspeaker, the vibration of sound film caused by lead-out wire is each more prominent to dissimilarity problem, and effective length of the voice coil in magnetic field is reduced
It is prominent, thus the distortion factor is bigger, has become the problem that Microspeaker cannot not captured brokenly.
The main problem of existing induction loudspeaker is that sensitivity is low.Chinese patent literature CN2412342Y's is quiet
Enclose induction loudspeaker, technical solution are as follows: coiling and induction ring vibration in magnetic gap is made by induction on conducting magnetic column
The audio signal from voice coil is reappeared, inductance loop improves transient response using extremely light material and widens high frequency characteristics.It is Chinese special
Sharp document CN201620430140.7 discloses a kind of induction loudspeaker, according to the electromagnetic induction of squirrel-cage rotor motor
Electromagnetic coil is accessed continually changing audio power signal, generates intensity and the continually changing magnetic field in direction by principle design,
Make to be placed in the electromagnetic induction ring being closed in magnetic field and generate induced current, as audio signal shakes, drives vibration basin sending sound
Sound, the size of power change with the intensity of audio signal.Japan Patent JP2000244998-A discloses a kind of electromagnetic induction
Formula loudspeaker, essential characteristic are that have an excitation coil (its so-called voice coil) on conducting magnetic column, and are one in magnetic gap
A close ring, coil, the close ring are connect with sound film.International publication number WO99/52325 Japanese patent discloses a kind of senses
Formula loudspeaker is answered, has the induction conducting ring of a closure to bond together at magnetic gap as voice coil and sound film, drives sound
Vibration of membrane, and the outer of upper clamp plate is bonded with a coil as excitation coil on the inside of inductance loop.United States Patent (USP) 5062140
A kind of induction loudspeaker is also disclosed, as the basic structure of the Japan Patent of WO99/52325, and in upper clamp plate
Outer has been bonded an excitation coil, and voice coil is a close ring.Publication number 2000244998A Japanese patent discloses one kind
Induction loudspeaker, be adhesively fixed an excitation coil on conducting magnetic column, and voice coil is the conductive inductance loop of a closure.
Above-mentioned existing induction loudspeaker all has the same feature, it may be assumed that voice coil is that a closure conducting ring drives sound
Vibration of membrane.It is proved by theoretical and experimental study, there are two defects for above-mentioned technical proposal: first is that inductance loop fever is tight
Weight, second is that the sensitivity for the loudspeaker sounding being made into is extremely low, shows by test using magnetic structure, centring disk and sound
The identical loudspeaker of film, it is single to incude ring type loudspeaker 45dB lower than common dynamic speakers sensitivity or so, thus nothing
Method reaches degree of being practical, so that producing widely used induction loudspeaker launch without producer so far.
Summary of the invention
It is an object of the invention to overcome prior art problem, one kind is provided and is inducted dynamic speaker, solves common electricity
Loudspeaker is lacked of proper care the low problem of larger, common induction loudspeaker sensitivity.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
One kind is inducted dynamic speaker, including excitation coil, sound film, induction voice coil, speech coil framework, magnet steel, upper magnetic conduction
Clamping plate, lower magnetic conductive board, centring disk and signal feed, the magnet steel is mounted between lower magnetic conductive board and upper magnetic conductive splint, described
Sound film is mounted on the upper end of magnetic conductive splint, and the centring disk outer is mounted on the upper end that position is upwarped on the outside of lower magnetic conductive board,
The excitation coil is packed on the center conducting magnetic column being made of upper magnetic conductive splint and magnet steel and by signal feed and external sound
Frequency current signal is connected, in the magnetic gap that upper magnetic conductive splint outer circle side and lower magnetic conductive board upwarp the formation of position inner circle side
Between installation induction voice coil, which is the multiturn coil for being wound on speech coil framework, the speech coil framework and sound film and centering
Along bonding together in branch piece, the magnet steel, lower magnetic conductive board, upper magnetic conductive splint are the magnetic conductions of high permeability and high resistivity
Body.
The induction voice coil is multiturn coil and passes through the end to end formation closed circuit of lead.
The speech coil framework is the light-weight metal cylinder of an opening.
The excitation coil connection signal feeder line and the through-hole and external audio current signal phase for passing through lower magnetic conductive board
Connection.
The helical pipe diameter of the induction voice coil is greater than or equal to the helical pipe diameter of excitation coil, the induction voice coil
Enclose the circle number that number is greater than or equal to excitation coil.
One kind is inducted dynamic speaker, including excitation coil, sound film, induction voice coil, speech coil framework, magnet steel, upper magnetic conduction
Clamping plate, lower magnetic conductive board, outer magnetic conductive board, centring disk and signal feed, the magnet steel are packed in lower magnetic conductive board outer upper end and outer
Between magnetic conductive board, the sound film is mounted on the upper end of magnetic conductive splint, and the centring disk outer is mounted on the upper of outer magnetic conductive board
End, the excitation coil are packed on the center conducting magnetic column formed by the lower magnetic conductive board center portion of upwarping and by signal feeds and outside
Portion's tone currents signal is connected, and sense is installed among the magnetic gap formed between upper magnetic conductive splint outer circle side and outer magnetic conductive board
Voice coil is answered, which is edge in the multiturn coil for being wound on speech coil framework, the speech coil framework and sound film and centring disk
It bonds together, the magnet steel, lower magnetic conductive board, upper magnetic conductive splint and outer magnetic conductive board are the magnetic conductions of high permeability and high resistivity
Body.
The induction voice coil is multiturn coil and passes through the end to end formation closed circuit of lead.
The speech coil framework is the light-weight metal cylinder of an opening.
The excitation coil connection signal feeder line and the through-hole and external audio current signal phase for passing through lower magnetic conductive board
Connection.
The helical pipe diameter of the induction voice coil is greater than or equal to the helical pipe diameter of excitation coil, and the induction voice coil exists
Number of active coils in magnetic gap is greater than or equal to the circle number of excitation coil.
The advantages and positive effects of the present invention are:
1, the present invention use two coil configuration, by excitation coil be wrapped on the conducting magnetic column of center and by the end of a thread with pass through under lead
The signal feed connection that the hole of magnetic sheet is pierced by, signal feed can be rigid line or flexible cord, and induction voice coil is wrapped in open metal
On skeleton, the end to end formation closed circuit of voice coil is incuded, voice-frequency signalling current is guided on excitation coil by signal feed and produced
Raw alternating magnetic field, so that the induction voice coil being located in magnetic gap generates induced current, the induced current is in magnetic field by Lip river
Logical sequence hereby power effect causes voice coil vibrations, to drive sound film sounding, phonosensitive coil is multi-lever and multi-strand winding, and end to end
Form closed circuit, skeleton is made into opening cylinder using light-weight metal thin slice, incude number of active coils of the voice coil in magnetic gap with
The bigger sensitivity of the ratio between the circle number of excitation coil is higher and the distortion factor is smaller, incudes the screwed pipe diameter of voice coil and the spiral shell of excitation coil
The ratio between pipe diameter is bigger, and sensitivity is higher, using silent skeleton can sounding but skeleton temperature increase, induction voice coil is opened
Although ring also can sounding but sensitivity decrease 5dB to 10dB, dynamic speaker of inducting substantially may be implemented and same magnetic circuit
The comparable levels of sensitivity of the dynamic speaker of structure improves 45dB than traditional single induction ring type induction loudspeaker sensitivity
Left and right.
2, due to there is no signal feed and external connection, voice coil and the connectionless line of frame on voice coil, it is ensured that the vibration of sound film
Isotropism when dynamic, thus the distortion factor can be reduced, obvious, work is reduced especially for small-sized and Microspeaker the distortion factor
It is more convenient to incude voice coil in industry production together with sound film injection molded.
3, compared with dynamic speaker, even if the number of active coils that the present invention incudes voice coil in low frequency large-amplitude vibration changes
Variable is few, and induced current generates on the voice coil in magnetic field always and by maximum Lorentz force, in large amplitude sounding
Generated distortion is smaller.
4, the tone currents signal of external feed-in is connected on excitation coil by the present invention by signal feed, excitation coil
By conducting magnetic column heat loss through conduction, thus the power margin for dynamic speaker of inducting is big, can be used for supersound projector.
5, magnet steel, upper magnetic conductive splint, lower magnetic conductive board and the outer magnetic conductive board in the present invention are all high permeability, high resistivity
Magnetizer, magnetic conduction software, permalloy as made of ferrite soft magnetic, silicon steel sheet overlapping, can also be hard with ferrite, neodymium iron boron
The integral type magnetic circuit that the permanent magnets such as magnetic material are constituted, the eddy-current loss for reducing magnetic loop is small, to improve comprehensive electro-acoustic conversion effect
Rate.
6, the electric current in induced current and excitation coil meets linear relationship, thus the present invention is a linear player.
7, present invention utilizes multiple circles to incude voice coil, improves response sensitivity, while using the aluminium skeleton of opening, keeping away
The problem of having exempted from voice coil overheat.
8, the present invention can be with by increasing the ratio between circle number of number of active coils and excitation coil in magnetic gap of induction voice coil
Improve the response sensitivity for dynamic speaker of inducting.
9, the present invention can be mentioned by the helical pipe diameter of increase induction voice coil and the solenoid diameter ratio of excitation coil
Height induct dynamic speaker response sensitivity and reduce the distortion factor.
The present invention realizes the High Linear sound-playing function of highly sensitive low imbalance, can show applied to Microspeaker
Writing reduces the distortion factor, can solve heat dissipation problem applied to supersound projector, can be widely used for the loudspeaker of various sizes, especially
It is that can realize low imbalance for Microspeakers such as Mobile phone horn, earphone horns, can realizes high-fidelity for medium-sized loudspeaker, be used for
High-power loudspeaker can realize good heat radiating.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (internal magnetization) of the first embodiment of the invention；
Fig. 2 is the structural schematic diagram (external magnetic type) of second of embodiment of the invention；
In figure, 1- excitation coil, 2- incudes voice coil, 3- speech coil framework, 4- sound film, 5- magnet steel, magnetic conductive board under 6-, on 7-
Magnetic conductive splint, 8- centring disk, 9- signal feed, the outer magnetic conductive board of 10-.
Specific embodiment
The embodiment of the present invention is further described below in conjunction with attached drawing:
The present invention is a kind of dynamic speaker of inducting of two coil configuration, and an excitation coil is located on the conducting magnetic column of center
Fixation is closely bonded with conducting magnetic column, another induction voice coil is located on speech coil framework and end to end formation closed circuit, sense
Answer voice coil to be wrapped in made of the flake aluminum of an opening on skeleton, induction voice coil can with fine aluminium enameled wire to reduce quality,
There is no signal feed to connect with frame on induction voice coil.Magnet steel is a kind of permanent magnet of high resistivity, upper magnetic conductive splint, lower magnetic conduction
Plate and outer magnetic conductive board are all the soft magnetic materials of high resistivity high magnetic conduction rate, and the small raising electro-acoustic of eddy-current loss for reducing magnetic loop turns
Change efficiency.Tone currents signal is input to generation alternating magnetic field in excitation coil by signal feed and to generate in induction voice coil
Induced current and generation induced current or vortex in speech coil framework conductor incude the induced current in voice coil and are vortexed in magnetic
Lorentz force is generated in magnetic field in gap to be made voice coil vibrations and drives sound film sounding.The helical pipe diameter for incuding voice coil, which is greater than, to swash
The helical pipe diameter for encouraging coil, incude the screwed pipe diameter of the helical pipe diameter of voice coil and the helical pipe diameter of excitation coil than more it is big then
Induct dynamic speaker sensitivity it is higher and the distortion factor is smaller, incude number of active coils of the voice coil in magnetic gap and be greater than excitation
The circle number of coil, the ratio between the circle number of number of active coils and excitation coil of induction voice coil in magnetic gap the big, and electrodynamic type of inducting is raised
The sensitivity of sound device is higher and the distortion factor is smaller, and induction voice coil is usually coiled into 2 layers or 4 layers and is convenient for the end to end shape of its lead
At closed circuit, incudes voice coil and do not need low-resistance so quality can be mitigated with fine aluminium enameled wire to improve high frequency response, swash
Coil requirement high conductivity is encouraged so pure copper wire enameled wire should be used.
It should be noted that the lead head and the tail of induction voice coil do not connect when not being formed into a loop, dynamic speaker is inducted still
Can sounding, only sensitivity low 5dB to 10dB, especially low frequency sensitivity are low, and the distortion factor increase, when the induction sound of closure
Dynamic speaker of inducting when being rubbed broken string among circle remains to sounding, only sensitivity decrease, and at many places broken string and one
The effect of broken string is identical, causes number of total coils to reduce as long as not dissipating circle, sensitivity is close with open circuit.When speech coil framework is closed still
Can sounding, and the sensitivity of skeleton contribution when being closed than opening is 5dB big to 10dB, but skeleton when speech coil framework is closed
Fever causes heating too high.Sounding is remained to when incuding voice coil and being wound on nonmetallic speech coil framework (such as epoxy resin thin plate), only not
Contribution will not be generated to sounding by crossing nonmetallic speech coil framework.The dynamic speaker although excitation coil is inducted when being mounted in magnetic gap
The magnetic field strength that energy sounding can still reduce magnetic gap leads to sensitivity decrease, and excitation coil can be protected on the conducting magnetic column of center
Card magnetic gap is sufficiently narrow and improves the magnetic field strength in magnetic gap to improve the sensitivity for dynamic speaker of inducting, and works as excitation coil
Installation remains to sounding when having the gap with center magnetic conduction intercolumniation, only sensitivity decrease about 3dB.
The present invention generates alternating magnetic field in the magnetic gap of loudspeaker using excitation coil, to generate electricity of inducting in voice coil
Stream, the effect for the Lorentz force that voice coil is generated in magnetic field by the induced current and vibrate.The present invention on magnetic structure with it is general
Energization loudspeaker is essentially the same, and low frequency response and high frequency response all increase, and frequency band is broadened, only in magnetizer
On increase an excitation coil, excitation coil is powered by external audio signal electric current, and it is multiturn and first for incuding voice coil
Tail short circuit forming circuit, the imbalance which plays voice signal is lower than traditional dynamic speaker, special
Be not low-frequency sound imbalance it is low, while improving 45dB or so than traditional single induction ring type induction loudspeaker sensitivity.
Two embodiments are given below, the present invention is further described:
Embodiment 1
A kind of internal magnetization is inducted dynamic speaker, as shown in Figure 1, including excitation coil 1, induction voice coil 2, speech coil framework
3, sound film 4, magnet steel 5, lower magnetic conductive board 6, upper magnetic conductive splint 7, centring disk 8 and signal feed 9.The magnet steel 5, which is mounted on down, leads
It is fixedly mounted between magnetic sheet 6 and the newel of upper magnetic conductive splint 7 and by bolt or glued together.The excitation coil 1 fastens
It is mounted on the center conducting magnetic column being combined by the lower end and magnet steel 5 of upper magnetic conductive splint 7, the 1 connection signal feeder line of excitation coil
9 and the signal feed pass through lower magnetic conductive board through-hole and connect external audio current signal.Magnet steel 5 be a kind of high resistivity forever
Magnet, upper magnetic conductive splint 7 and lower magnetic conductive board 6 are all the permeability magnetic materials of high permeability and high resistivity, reduce the vortex of magnetic loop
It is lost small.End inside is laterally upwarped outside upper magnetic conductive splint 7 with the outside of lower magnetic conductive board 6 and forms magnetic gap, the induction voice coil 2
Among magnetic gap.The sound film 4 is made of the loudspeaker of intermediate semicircle dust cover and periphery and is mounted on speech coil framework 3,
Around on speech coil framework 3, the outside that the outer of the centring disk 8 is mounted on lower magnetic conductive splint 6 upwarps the induction voice coil 2
End face, interior edge and the speech coil framework 3 and sound film 4 of centring disk 8 are adhesively fixed together, which keeps induction voice coil
Deviation is not generated.Induction voice coil 2 in the present invention not ensure that with external connecting line when driving the vibration of sound film it is each to
The same sex.
Embodiment 2
A kind of external magnetic type is inducted dynamic speaker, as shown in Fig. 2, including excitation coil 1, induction voice coil 2, speech coil framework
3, sound film 4, magnet steel 5, lower magnetic conductive board 6, upper magnetic conductive splint 7, centring disk 8, signal feed 9 and outer magnetic conductive board 10.Magnet steel 5 is one
Permanent magnet, upper magnetic conductive splint 7, lower magnetic conductive board 6 and the outer magnetic conductive board 10 of kind high resistivity are all high permeability and high resistivity
Soft magnetic materials, the eddy-current loss for reducing magnetic loop are small to improve electro-acoustic transfer efficiency.Upper magnetic conductive splint 7 is mounted on lower magnetic conductive board 6
Center upwarp on end face and be solidly installed by bolt or gluing, the magnet steel 5 is mounted on lower 6 outer upper end of magnetic conductive board
It is solidly installed between face and outer magnetic conductive board 10 and by bolt or gluing, the lateral surface and outer magnetic conductive board of upper magnetic conductive splint 7
Magnetic gap is formed between 10 medial surface, the induction voice coil 2 is located among magnetic gap.The excitation coil 1 is securedly mounted to
On the center conducting magnetic column formed by the center portion of upwarping of lower magnetic conductive board 6, the 1 connection signal feeder line 9 of excitation coil and signal feedback
Line 9 passes through the through-hole of lower magnetic conductive board and connects external audio current signal.The sound film 4 is by intermediate semicircle dust cover and periphery
Loudspeaker are constituted and are mounted on speech coil framework 3, and the induction voice coil 2 is around on the speech coil framework 3, the speech coil framework 3 and sound film
4 bond together, and the outer of the centring disk 8 is mounted on the upper surface of outer magnetic conductive board 10, the interior edge of centring disk 8 and voice coil
Together with skeleton 3 is adhesively fixed with sound film 4, which keeps induction voice coil not generate deviation.Induction sound in the present invention
Circle 2 not ensure that the isotropism when driving the vibration of sound film with external connecting line.
The operation principle of the present invention is that:
Externally input tone currents signal generates alternating magnetic field, passes through after 9 feed-in excitation coil 1 of signal feed
Center conducting magnetic column is oriented to magnetic gap, so that generating induced current in the induction voice coil 2 being located in magnetic gap, while in speech coil framework
Vortex is generated in 3, magnet steel 5 is reached by upper magnetic conductive splint 7 and lower magnetic conductive board 6 and forms static high magnetic field in magnetic gap, and sound is incuded
Induced current on circle 2 is vibrated up and down with the Lorentz force action in magnetic field is vortexed, and the dynamics of vibration and direction are by outer
The tone currents control of portion's input, the two are in a linear relationship.Induction voice coil 2 and speech coil framework 3 drive sound film 4 to vibrate and send out together
Sound.
In the above scheme, Lorentz force of the induced current in magnetic gap:
U is enter into the audio voltage on excitation coil, and B is the magnetic field strength in magnetic gap, helical caliber ratio nD=D2/
D1, D1It is the helical pipe diameter of excitation coil, D2It is the helical pipe diameter for incuding voice coil, nDBigger, Lorentz force F is bigger, N1It is
Excitation coil the number of turns, N2It is the number of active coils for incuding voice coil in magnetic gap, effective turn ratio nN=N2/N1, nNIt is bigger, Lorentz lorentz
Power F is bigger.ρ is the resistivity of primary coil, and S is the sectional area of wire of excitation coil, and B is related with magnetic permeability, and k is and magnetic conduction
The related electromagnetic induction coefficient of coup of the resistivity of material, it is bigger that smaller k is lost in resistivity more maelstrom.Work as D2> D1, i.e. helical
Caliber ratio nD> 1, N2> N1, i.e. circle number ratio nN> 1, S is sufficiently large, and when B is sufficiently large, the sensitivity of induction loudspeaker is just high,
Lorentz force F is directly proportional to driving voltage, the electricalresistivityρ with induction voice coil loop material2Unrelated, i.e. induction voice coil need not use copper
Line can directly use aluminum steel.
Incude the heat on every circle coil on voice coil:
I is enter into the tone currents on excitation coil, N1It is excitation coil the number of turns, N2It is induction voice coil in magnetic gap
Number of active coils, effective turn ratio nN=N2/N1, effective turn ratio is bigger, and total calorific value is smaller.In order to reduce total calorific value, swash
The conducting wire of low-resistivity ρ will be used by encouraging coil.As long as N1Enough should not be too big, enough friendship energy magnetic field can be induced just
Row, that is, the inductance of excitation coil is mainly controlled, inductance is bigger, and high frequency induction reactance is bigger, and high frequency response can drop
It is low.But N1The too big too long total calorific value of line is big.The electromagnetic induction of high frequency is better than low frequency under certain induction reactance, so it is electronic to induct
The Hz-KHz of formula loudspeaker is more wider than electrodynamic type.Sounding is remained to when excitation coil installation has the gap with center magnetic conduction intercolumniation,
Only sensitivity decrease about 3dB.
For achieving the above object, the input resistance of the excitation coil of dynamic speaker provided by the invention of inducting is set
It counts in 2 Ω, 4 Ω, the standard value ranges such as 8 Ω, common voice signal can be played, it is not necessary to modify matched audio function
Rate amplifier.
It should be strongly noted that dynamic speaker of inducting can both be designed to internal magnetization (embodiment 1), can also set
Count into external magnetic type (embodiment 2), it might even be possible to be compound multipath magnetic circuit formula, induction voice coil is made by the coil both ends short circuit of continuous winding
To incude voice coil, induction voice coil is wound on the aluminium skeleton of opening, belongs in other variations of magnetic structure form of the invention
Claim categories.It is modified as more close rings superposition perhaps more split rings superpositions or by excitation coil in form in voice coil
Position be adjusted on magnetic circuit, as long as having used the induction voice coil and excitation coil of multiturn simultaneously, belong to the present invention
Claim categories.
Claims (10)
- The dynamic speaker 1. one kind is inducted, including excitation coil, sound film, magnet steel, upper magnetic conductive splint, lower magnetic conductive board, centering branch Piece and signal feed, the magnet steel are mounted between lower magnetic conductive board and upper magnetic conductive splint, and the sound film is mounted on magnetic conductive splint Upper end, the centring disk outer is mounted on the upper end of lower magnetic conductive board, it is characterised in that: the excitation coil is packed in by upper It is connected on the center conducting magnetic column that magnetic conductive splint and magnet steel are constituted and by signal feed with external audio current signal, is led upper Installation induction voice coil, the induction among the magnetic gap that the inner circle side upwarped on the outside of magnetic clutch plate outer circle side and lower magnetic conductive board is formed Voice coil is that the multiturn coil for being wound on speech coil framework, the speech coil framework and sound film bond together with edge in centring disk, institute State the magnetizer that magnet steel, lower magnetic conductive board, upper magnetic conductive splint are high permeability and high resistivity.
- 2. dynamic speaker according to claim 1 of inducting, it is characterised in that: the induction voice coil be multiturn coil simultaneously And it is not closed by the end to end formation closed circuit of lead or the induction voice coil for multiturn coil.
- 3. dynamic speaker according to claim 1 of inducting, it is characterised in that: the speech coil framework is an opening Light-weight metal cylinder or the speech coil framework are the light-weight metal cylinders of closed loop.
- 4. dynamic speaker according to claim 1 of inducting, it is characterised in that: the excitation coil lock ring is wrapped in It connect on the conducting magnetic column of center with the signal feed for the through-hole for passing through lower magnetic conductive board and is connected with external audio current signal, or There are certain gaps with center conducting magnetic column for the excitation coil.
- 5. dynamic speaker according to claim 1 of inducting, it is characterised in that: the helical pipe diameter of the induction voice coil More than or equal to the helical pipe diameter of excitation coil, number of active coils of the induction voice coil in magnetic gap is greater than or equal to excitation The circle number of coil.
- The dynamic speaker 6. one kind is inducted, including excitation coil, sound film, magnet steel, upper magnetic conductive splint, lower magnetic conductive board, outer magnetic conduction Plate, centring disk and signal feed, the magnet steel are packed between lower magnetic conductive board outer upper end and outer magnetic conductive board, the sound film peace Mounted in the upper end of upper magnetic conductive splint, the centring disk outer is mounted on the upper end of outer magnetic conductive board, it is characterised in that: the excitation Coil is packed on the center conducting magnetic column formed by the lower magnetic conductive board center portion of upwarping and by signal feed and external audio electric current Signal is connected, installation induction voice coil, the induction among the magnetic gap formed between outer magnetic conductive board on the outside of upper magnetic conductive splint Voice coil is that the multiturn coil for being wound on speech coil framework, the speech coil framework and sound film bond together with edge in centring disk, institute State the magnetizer that magnet steel, lower magnetic conductive board, upper magnetic conductive splint and outer magnetic conductive board are high permeability and high resistivity.
- 7. dynamic speaker according to claim 6 of inducting, it is characterised in that: the induction voice coil be multiturn coil simultaneously And it is not closed by the end to end formation closed circuit of lead or the induction voice coil for multiturn coil.
- 8. dynamic speaker according to claim 6 of inducting, it is characterised in that: the speech coil framework is an opening Light-weight metal cylinder or the speech coil framework are the light-weight metal cylinders of closed loop.
- 9. dynamic speaker according to claim 6 of inducting, it is characterised in that: during the excitation coil lock ring is wrapped in It connect on heart conducting magnetic column with the signal feed for the through-hole for passing through lower magnetic conductive board and is connected with external audio current signal, Huo Zhesuo Stating excitation coil, there are certain gaps with center magnetic conduction intercolumniation.
- 10. dynamic speaker according to claim 6 of inducting, it is characterised in that: the solenoid of the induction voice coil is straight Diameter is greater than or equal to the helical pipe diameter of excitation coil, and number of active coils of the induction voice coil in magnetic gap, which is greater than or equal to, to swash Encourage the circle number of coil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710227545.XA CN106878888B (en) | 2017-04-10 | 2017-04-10 | Induct dynamic speaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710227545.XA CN106878888B (en) | 2017-04-10 | 2017-04-10 | Induct dynamic speaker |
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| CN106878888A CN106878888A (en) | 2017-06-20 |
| CN106878888B true CN106878888B (en) | 2019-07-30 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107249163B (en) * | 2017-07-10 | 2023-06-30 | 歌尔股份有限公司 | Sounding device |
| CN107454532B (en) * | 2017-09-27 | 2023-09-05 | 嘉兴市金利达电子有限公司 | Double-regulation loudspeaker magnetic circuit system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2412342Y (en) * | 2000-03-14 | 2000-12-27 | 陈友余 | Static-ring induction loudspeaker |
| CN1575029A (en) * | 2003-06-18 | 2005-02-02 | 吴琪君 | A low-inductance electromagnetic driver for non-exciting magnetic circuit |
| CN2754616Y (en) * | 2004-11-12 | 2006-02-01 | 中国科学院声学研究所 | Music sendible vibration system in water for human body acoustic sensing biological resonant signal research |
| CN200956660Y (en) * | 2006-06-30 | 2007-10-03 | 常州美欧电子有限公司 | Loudspeaker with short circuit structure |
| JP2010258955A (en) * | 2009-04-28 | 2010-11-11 | J&K Car Electronics Corp | Excitation type acoustic generator |
| CN105208485A (en) * | 2015-11-06 | 2015-12-30 | 珠海丽磁音响有限公司 | Excitation earphones |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050185816A1 (en) * | 2002-10-16 | 2005-08-25 | Roark Richard S. | Loudspeaker driver having a removable diaphragm assembly, parts kit and method for rebuilding a loudspeaker driver in the field |
-
2017
- 2017-04-10 CN CN201710227545.XA patent/CN106878888B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2412342Y (en) * | 2000-03-14 | 2000-12-27 | 陈友余 | Static-ring induction loudspeaker |
| CN1575029A (en) * | 2003-06-18 | 2005-02-02 | 吴琪君 | A low-inductance electromagnetic driver for non-exciting magnetic circuit |
| CN2754616Y (en) * | 2004-11-12 | 2006-02-01 | 中国科学院声学研究所 | Music sendible vibration system in water for human body acoustic sensing biological resonant signal research |
| CN200956660Y (en) * | 2006-06-30 | 2007-10-03 | 常州美欧电子有限公司 | Loudspeaker with short circuit structure |
| JP2010258955A (en) * | 2009-04-28 | 2010-11-11 | J&K Car Electronics Corp | Excitation type acoustic generator |
| CN105208485A (en) * | 2015-11-06 | 2015-12-30 | 珠海丽磁音响有限公司 | Excitation earphones |
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| Publication number | Publication date |
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| CN106878888A (en) | 2017-06-20 |
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