CN110324763A - High-fidelity cone loudspeaker - Google Patents
High-fidelity cone loudspeaker Download PDFInfo
- Publication number
- CN110324763A CN110324763A CN201910595077.0A CN201910595077A CN110324763A CN 110324763 A CN110324763 A CN 110324763A CN 201910595077 A CN201910595077 A CN 201910595077A CN 110324763 A CN110324763 A CN 110324763A
- Authority
- CN
- China
- Prior art keywords
- voice coil
- conical diaphragm
- reinforcement block
- fidelity
- extension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
-
- 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
- H04R9/025—Magnetic circuit
-
- 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
- H04R9/04—Construction, mounting, or centering of coil
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The present invention relates to a kind of high-fidelity cone loudspeakers, in particular to technical field of acoustics, including frame, vibrational system and for providing the magnetic circuit system of driving force for vibrational system, the vibrational system includes conical diaphragm, voice coil and dust cover, the voice coil is set to frame center, the conical diaphragm is set between voice coil and frame mouth end, the dust cover is fixed on the one end of voice coil far from magnetic gap, the dust cover include for cover at the top of the top dome shape at voice coil mouth end and along top dome shape top edge turn back after to the extension extended far from top dome shape top apex direction, the extension elongated end is equipped with the arc reinforcement block extended along conical diaphragm small end to big extreme direction, there are clearance spaces between the arc reinforcement block and conical diaphragm.The present invention while playing protection effect, can change the diaphagras state of conical diaphragm, improve the high frequency characteristics of loudspeaker, promote sound quality, can also promote stiffness and strength.
Description
Technical field
The present invention relates to technical field of acoustics, more particularly, to a kind of high-fidelity cone loudspeaker.
Background technique
Loudspeaker as convert electrical energy into sound can common electro-acoustic transducer device, played in sound place system can not or
Scarce effect.High-fidelity cone loudspeaker is a most weak device in sound place system, and for sound puts effect, it
It is a most important component again.Loudspeaker press its diaphragm structure difference, can be divided into cone loudspeaker, dome loudspeaker,
Plate shaped loudspeaker and ribbon speaker, wherein cone loudspeaker is most widely used.Existing cone loudspeaker mainly includes
Vibrational system, magnetic circuit system and auxiliary system, wherein vibrational system includes conical diaphragm, voice coil, centring disk and dust cover, mesh
The preceding research for vibrational system is concentrated mainly on conical diaphragm, and considerably less for the research of dust cover, in the prior art
Dust cover be bonded at vibrating diaphragm center, main function is to prevent dust from entering magnetic gap, influences high frequency performance, but shake to taper
The service hoisting effect very little of film, especially for change conical diaphragm diaphagras state almost without castering action, and
And existing this body structure of dust cover is relatively simple, the stiffness and strength of itself are also to be improved.
Summary of the invention
The object of the present invention is to provide a kind of high-fidelity cone loudspeakers, can change while playing protection effect
The diaphagras state of conical diaphragm improves the high frequency characteristics of loudspeaker, promotes sound quality, can also promote stiffness and strength.
Foregoing invention purpose of the invention has the technical scheme that
A kind of high-fidelity cone loudspeaker, including frame, vibrational system and for providing the magnetic circuit system of driving force for vibrational system
System, the vibrational system includes conical diaphragm, voice coil and dust cover, and the voice coil is set to frame center, the conical diaphragm
It is set between voice coil and frame mouth end, the dust cover is fixed on the one end of voice coil far from magnetic gap, and the dust cover includes using
At the top of the top dome shape for covering voice coil mouth end and along top dome shape top edge turn back after prolong to far from top dome shape top apex direction
The extension stretched, the extension elongated end is equipped with the arc reinforcement block extended along conical diaphragm small end to big extreme direction, described
There are clearance spaces between arc reinforcement block and conical diaphragm.
By using above-mentioned technical proposal, it is convenient for being adhesively fixed with voice coil using extension, it is convenient for assembly, while can increase
The integral strength and rigidity of strong dust cover；And arc reinforcement block is used, and there are gaps between arc reinforcement block and conical diaphragm
Space can change the diaphagras state of conical diaphragm, improve the high frequency characteristics of loudspeaker, promote sound quality.
Further, the extension is to extend along top dome shape top edge to far from the inclination of top dome shape top apex direction
Bell mouth shape structure, the inner wall of the extension do not contact with the outer wall of voice coil.
By using above-mentioned technical proposal, extension uses bell mouth shape structure, can enhance the resistance of conical diaphragm small end
Buddhist nun, and convenient for assembly, since the inner wall of extension is not contacted with the outer wall of voice coil, the diaphagras shape of also changeable conical diaphragm
State promotes the performance of conical diaphragm.
Further, the conical diaphragm is curved configuration, the curvature of the arc reinforcement block and conical diaphragm
Curvature is identical.
By using above-mentioned technical proposal, arc reinforcement block is enable preferably to be combined with conical diaphragm, and then improves and change
Become the effect of conical diaphragm diaphagras state.
Further, the arc reinforcement block is size header structure, and the small head end of the arc reinforcement block is fixed on extension
The stub end of elongated end end face, arc reinforcement block is hanging, and the small head end end face of the arc reinforcement block is not contacted with voice coil outer wall.
By using above-mentioned technical proposal, make arc reinforcement block strength and stiffness with higher itself, while can be right
Conical diaphragm plays better auxiliaring effect, to improve the high frequency characteristics of loudspeaker, promotes sound quality.
Further, the voice coil is suspended in the magnetic gap being equipped with inside magnetic circuit system by centring disk, the voice coil
One end equipped with coiling is located in magnetic gap, and the other end stretches out outside magnetic circuit system.
By using above-mentioned technical proposal, the driving force that magnetic circuit system generates passes to voice coil, is the vibration of conical diaphragm
Power is provided；And by setting centring disk, correct position of the voice coil in magnetic gap can not only be kept, and guarantee that voice coil exists
When stress, vibrational system is moved axially in reciprocal fashion, and can also prevent dust from entering magnetic gap.
Further, the voice coil is positioned at frame center by centring disk support, and one end that voice coil is equipped with coiling is outstanding
In the magnetic gap being equipped with inside magnetic circuit system.
By using above-mentioned technical proposal, the driving force that magnetic circuit system generates passes to voice coil, is the vibration of conical diaphragm
Power is provided；And by setting centring disk, correct position of the voice coil in magnetic gap can not only be kept, and guarantee that voice coil exists
When stress, vibrational system is moved axially in reciprocal fashion, and can also prevent dust from entering magnetic gap.
Further, the conical diaphragm is between arc reinforcement block and centring disk.
By using above-mentioned technical proposal, to guarantee that arc reinforcement block can change the diaphagras state of conical diaphragm,
Promote sound quality.
Further, the small end of the conical diaphragm is sheathed on outside voice coil, and big end connects by the way that ring and frame mouth end are fixed
It connects, the small end of the conical diaphragm is not contacted with voice coil outer wall.
The vibration of conical diaphragm can be supported and be kept, taper is made by the way that ring is arranged by using above-mentioned technical proposal
Vibrating diaphragm can in axial direction free vibration, be but unable to transverse shifting, and due to the damping and amortization that ring itself has, make resonance and anti-
It penetrates and all reduces；Due to, there are clearance space, the fortune to voice coil in magnetic gap may be implemented between the small end and voice coil of conical diaphragm
It is dynamic to be oriented to, conducive to the transmitting of vibration force.
Further, it is straight to be located at same for the axle center of the frame, voice coil, conical diaphragm, dust cover and magnetic circuit system
On line.
By using above-mentioned technical proposal, guarantee high-fidelity characteristic, and convenient for assembly.
In conclusion advantageous effects of the invention are as follows:
1. it is convenient for assembly convenient for being adhesively fixed with voice coil by setting extension, while the integral strength of dust cover can be enhanced
And rigidity；And arc reinforcement block is used, and there are clearance spaces between arc reinforcement block and conical diaphragm, taper vibration can be changed
The diaphagras state of film improves the high frequency characteristics of loudspeaker, promotes sound quality；
2. using the extension of bell mouth shape structure the damping of conical diaphragm small end can be enhanced, and convenient for assembly, due to extending
The inner wall in portion is not contacted with the outer wall of voice coil, and the diaphagras state of also changeable conical diaphragm promotes the performance of conical diaphragm；
3. making arc reinforcement block strength and stiffness with higher itself, while energy using the arc reinforcement block of size header structure
It is enough that better auxiliaring effect is played to conical diaphragm, to improve the high frequency characteristics of loudspeaker, promote sound quality.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the portion A-A cross-sectional view in Fig. 1；
Fig. 3 is the right side view of Fig. 1；
Fig. 4 is the portion B-B cross-sectional view in Fig. 3；
Fig. 5 is the stereoscopic schematic diagram of Fig. 3.
In figure, 1, frame；11, patch bay；2, vibrational system；3, magnetic circuit system；31, magnetic gap；32, magnetic conduction lower plate；32a,
Conducting magnetic column；33, magnet；34, magnetic conduction upper plate；4, voice coil；41, coiling；42, bobbin；43, crimping paper；5, conical diaphragm；6, prevent
Dust hood；61, at the top of top dome shape；62, extension；63, arc reinforcement block；7, ring；71, the first connection side；72, the second connection
Side；8, compressing member；9, centring disk.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Referring to Fig.1, Fig. 2 and Fig. 5 is a kind of high-fidelity cone loudspeaker disclosed by the invention, including frame 1, vibration system
System 2 and for providing the magnetic circuit system 3 of driving force for vibrational system 2, frame 1 is pyramidal structure, for connecting 2 He of vibrational system
Magnetic circuit system is wherein fixed with patch bay 11 in frame 1, assembles and connect with external equipment.Vibrational system 2 includes conical diaphragm
5, voice coil 4 and dust cover 6, voice coil 4 include bobbin 42, the coiling 41 being adhesively fixed on bobbin 42 and are adhesively fixed on
The crimping paper 43 being arranged side by side on bobbin and with coiling 41 along axial direction；The material of conical diaphragm 5 can be papery or composite wood
Material；Magnetic circuit system 3 includes magnetic conduction lower plate 32, magnet 33 and the magnetic conduction upper plate 34 that center has conducting magnetic column 32a, and 33 sets of magnet are being led
Magnetic pole 32a is outer and is fixed between magnetic conduction lower plate 32 and magnetic conduction upper plate 34, between 34 inner wall of conducting magnetic column 32a outer wall and magnetic conduction upper plate
Form magnetic gap 31；Voice coil 4 is located at 1 center of frame, and conical diaphragm 5 is mounted between 1 mouthful of end of voice coil 4 and frame.Dust cover 6 is fixed
It is connected to the one end of voice coil 4 far from magnetic gap 31, dust cover 6 includes the top dome shape top 61 and edge for being adhesively fixed on 4 mouthfuls of ends of voice coil
To the extension 62 extended far from 61 zenith directions at the top of top dome shape, 62 elongated end of extension after 61 edges are turned back at the top of top dome shape
It is adhesively fixed with the arc reinforcement block 63 extended along 5 small end of conical diaphragm to big extreme direction, arc reinforcement block 63 and conical diaphragm 5
Between there are clearance spaces, the diaphagras state of conical diaphragm 5 can not only be changed in this way, the high frequency for improving loudspeaker is special
Property, promote sound quality, and convenient for being adhesively fixed with voice coil 4, it is convenient for assembly, at the same can also enhance dust cover 6 integral strength and
Rigidity.Specifically, arc reinforcement block 63 can be used two, two arc reinforcement blocks 63 are along 62 circumferencial direction interval cloth of extension
It sets, to improve the effect for the diaphagras state for changing conical diaphragm 5.
Referring to Fig. 3 and Fig. 4, extension 62 is to incline along 61 edges at the top of top dome shape to far from 61 zenith directions at the top of top dome shape
The inner wall of the bell mouth shape structure tiltedly extended, extension 62 is not contacted with the outer wall of voice coil 4, can enhance conical diaphragm 5
The damping of small end, and then change the diaphagras state of conical diaphragm 5, the performance of conical diaphragm is promoted, is also convenient for assembling.
Referring to Fig. 3 and Fig. 4, conical diaphragm 5 is curved configuration, curvature and the conical diaphragm 5 of arc reinforcement block 63
Curvature is identical, and arc reinforcement block 63 is enable preferably to be combined with conical diaphragm 5, and then improves and change conical diaphragm segmentation vibration
The effect of dynamic state.
Referring to Fig. 3 and Fig. 5, arc reinforcement block 63 is size header structure, and the small head end of the arc reinforcement block 63 is adhesively fixed
In 62 elongated end end face of extension, the stub end of arc reinforcement block 63 is hanging, the small head end end face of arc reinforcement block 63 and voice coil 4
Outer wall does not contact, and makes arc reinforcement block 63 strength and stiffness with higher itself, while can play to conical diaphragm 5 more preferably
Auxiliaring effect promote sound quality to improve the high frequency characteristics of loudspeaker.
Referring to Fig. 2 and Fig. 5, voice coil 4 is suspended in the magnetic gap 31 being equipped with inside magnetic circuit system 3 by centring disk 9, voice coil
4 one end for being equipped with coiling 41 are located in magnetic gap 31, and the other end stretches out outside magnetic circuit system 3, and the driving force for generating magnetic circuit system 3 passes
Voice coil 4 is passed, the vibration for conical diaphragm 5 provides power.Specifically, centring disk 9 uses wave structure, outer ring bonding
It is fixed in the mounting groove being equipped with inside frame 1, inner ring is bonded and fixed to 42 outer wall of bobbin, to keep voice coil 4 in magnetic gap 31
In correct position, guarantee voice coil 4 in stress, vibrational system 2 moves axially in reciprocal fashion, and prevents dust from entering magnetic gap 31.
Referring to Fig. 2 and Fig. 5, conical diaphragm 5 is between arc reinforcement block 63 and centring disk 9, to guarantee that arc is reinforced
Block can change the diaphagras state of conical diaphragm 5, promote sound quality, and right using arc reinforcement block 63 and centring disk 9
Conical diaphragm 5 is limited, and guarantees vibrating effect.
Referring to Fig. 2 and Fig. 5, the small end of conical diaphragm 5 is sheathed on outside voice coil 4, and big end is solid by ring 7 and 1 mouthful of end of frame
Fixed connection, the small end of conical diaphragm 5 are not contacted with 4 outer wall of voice coil.Specifically, ring 7 is semicircular structure, the ring 7 is radial
One end is integrally formed the second connection side 72 integrally formed with the first connection side 71, the radial other end of ring 7, wherein the first connection side
71 are adhesively fixed with 5 big end outer wall of conical diaphragm, and 1 mouthful of end of frame is fixed on by the press fitting of compressing member 8 in the second connection side 72.
Referring to Fig. 2 and Fig. 5, frame 1, voice coil 4, conical diaphragm 5, dust cover 6 and magnetic circuit system 3 axle center be located at it is same
On straight line, to guarantee high-fidelity characteristic, and convenient for assembly.
The implementation principle of above-described embodiment are as follows: provide magnetic force to voice coil 4 by magnetic circuit system 3, make the vibration of conical diaphragm 5 simultaneously
Resonance is generated with the air of surrounding and is made a sound, while in 5 vibration processes of conical diaphragm, and top dome shape top 61 and arc add
Strong block 63 can also generate resonance accordingly, to change the diaphagras state of conical diaphragm 5, the high frequency for improving loudspeaker is special
Property, promote sound quality.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of high-fidelity cone loudspeaker, including frame (1), vibrational system (2) and for providing driving for vibrational system (2)
The magnetic circuit system (3) of power, the vibrational system (2) include conical diaphragm (5), voice coil (4) and dust cover (6), the voice coil (4)
It is set to frame (1) center, the conical diaphragm (5) is set between voice coil (4) and frame (1) mouth end, it is characterised in that: institute
One end that dust cover (6) is fixed on voice coil (4) separate magnetic gap (31) is stated, the dust cover (6) includes for covering voice coil (4) mouth
At the top of the top dome shape at end (61) and along (61) edge at the top of top dome shape turn back after prolong to far from (61) zenith directions at the top of top dome shape
The extension (62) stretched, extension (62) elongated end are equipped with the arc extended along conical diaphragm (5) small end to big extreme direction
Reinforcement block (63), there are clearance spaces between the arc reinforcement block (63) and conical diaphragm (5).
2. high-fidelity cone loudspeaker according to claim 1, it is characterised in that: the extension (62) is along top dome shape
Top (61) edge is to far from the bell mouth shape structure that the inclination of (61) zenith directions extends at the top of top dome shape, the extension (62)
Inner wall do not contacted with the outer wall of voice coil (4).
3. high-fidelity cone loudspeaker according to claim 2, it is characterised in that: the conical diaphragm (5) is curved shape
The curvature of structure, the arc reinforcement block (63) is identical as the curvature of conical diaphragm (5).
4. high-fidelity cone loudspeaker according to claim 3, it is characterised in that: the arc reinforcement block (63) is size
Header structure, the small head end of the arc reinforcement block (63) are fixed on extension (62) elongated end end face, arc reinforcement block (63) it is big
Head end is hanging, and the small head end end face of the arc reinforcement block (63) is not contacted with voice coil (4) outer wall.
5. high-fidelity cone loudspeaker according to claim 4, it is characterised in that: the voice coil (4) passes through centring disk
(9) it is suspended in the magnetic gap (31) being equipped with inside magnetic circuit system (3), one end that the voice coil (4) is equipped with coiling (41) is located at magnetic
In gap (31), the other end stretches out magnetic circuit system (3) outside.
6. high-fidelity cone loudspeaker according to claim 5, it is characterised in that: the conical diaphragm (5) is located at arc
Between reinforcement block (63) and centring disk (9).
7. high-fidelity cone loudspeaker according to claim 6, it is characterised in that: the small end cap of the conical diaphragm (5)
Outside set on voice coil (4), big end is fixedly connected by ring (7) with frame (1) mouth end, the small end and sound of the conical diaphragm (5)
Circle (4) outer wall does not contact.
8. high-fidelity cone loudspeaker according to claim 7, it is characterised in that: the frame (1), voice coil (4), taper
The axle center of vibrating diaphragm (5), dust cover (6) and magnetic circuit system (3) is located on the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910595077.0A CN110324763B (en) | 2019-07-03 | 2019-07-03 | Hi-Fi cone loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910595077.0A CN110324763B (en) | 2019-07-03 | 2019-07-03 | Hi-Fi cone loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110324763A true CN110324763A (en) | 2019-10-11 |
| CN110324763B CN110324763B (en) | 2020-09-22 |
Family
ID=68122425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910595077.0A Active CN110324763B (en) | 2019-07-03 | 2019-07-03 | Hi-Fi cone loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110324763B (en) |
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| US20050271239A1 (en) * | 2004-03-19 | 2005-12-08 | Tomoyuki Watanabe | Speaker device |
| FR2885277A3 (en) * | 2005-04-29 | 2006-11-03 | Merry Electronics Co Ltd | Loudspeaker`s diaphragm and sound modulator assembly for wireless communication, has modulator with two sides combined at L-shaped distal end of modulator section of vibration diaphragm, and dustproof cover placed on upper side of modulator |
| EP1788839A1 (en) * | 2005-11-21 | 2007-05-23 | Pioneer Corporation | Speaker apparatus |
| US20090100984A1 (en) * | 2007-10-18 | 2009-04-23 | Ruffino William E | Special Resonant Side Drumhead for Live and Studio Miking Applications |
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| CN203722816U (en) * | 2014-02-25 | 2014-07-16 | 深圳东原电子有限公司 | Low-distortion miniature conical full-frequency loudspeaker |
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| CN204616033U (en) * | 2015-04-30 | 2015-09-02 | 朝阳聚声泰（信丰）科技有限公司 | A kind of earphone horn reducing diaphagras |
| CN206713050U (en) * | 2017-04-26 | 2017-12-05 | 沈玉渝 | A kind of Full-frequency trumpet |
| WO2019027592A1 (en) * | 2017-08-03 | 2019-02-07 | Bose Corporation | Inverted button cap in acoustic transducer |
| CN208956322U (en) * | 2018-09-07 | 2019-06-07 | 深圳声唯尔科技有限公司 | A kind of coil-moving speaker monomer reducing diaphagras |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050271239A1 (en) * | 2004-03-19 | 2005-12-08 | Tomoyuki Watanabe | Speaker device |
| FR2885277A3 (en) * | 2005-04-29 | 2006-11-03 | Merry Electronics Co Ltd | Loudspeaker`s diaphragm and sound modulator assembly for wireless communication, has modulator with two sides combined at L-shaped distal end of modulator section of vibration diaphragm, and dustproof cover placed on upper side of modulator |
| EP1788839A1 (en) * | 2005-11-21 | 2007-05-23 | Pioneer Corporation | Speaker apparatus |
| US20090100984A1 (en) * | 2007-10-18 | 2009-04-23 | Ruffino William E | Special Resonant Side Drumhead for Live and Studio Miking Applications |
| KR20100009891A (en) * | 2008-07-21 | 2010-01-29 | 에스텍 주식회사 | Speaker |
| CN201611947U (en) * | 2010-03-20 | 2010-10-20 | 李景海 | Forced sound woofer |
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| CN102098611A (en) * | 2011-03-18 | 2011-06-15 | 旺兴达（丰顺）电子有限公司 | Full-frequency loudspeaker provided with double voice coils |
| CN203722816U (en) * | 2014-02-25 | 2014-07-16 | 深圳东原电子有限公司 | Low-distortion miniature conical full-frequency loudspeaker |
| CN204616028U (en) * | 2015-04-30 | 2015-09-02 | 朝阳聚声泰（信丰）科技有限公司 | There is the earphone horn reducing diaphagras function |
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| CN206713050U (en) * | 2017-04-26 | 2017-12-05 | 沈玉渝 | A kind of Full-frequency trumpet |
| WO2019027592A1 (en) * | 2017-08-03 | 2019-02-07 | Bose Corporation | Inverted button cap in acoustic transducer |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110324763B (en) | 2020-09-22 |
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