CN107889037A - A kind of split type high intensity receiver - Google Patents
A kind of split type high intensity receiver Download PDFInfo
- Publication number
- CN107889037A CN107889037A CN201711405523.4A CN201711405523A CN107889037A CN 107889037 A CN107889037 A CN 107889037A CN 201711405523 A CN201711405523 A CN 201711405523A CN 107889037 A CN107889037 A CN 107889037A
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- CN
- China
- Prior art keywords
- groove
- receiver
- vibrating diaphragm
- docking
- high intensity
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- 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.)
- Pending
Links
- 238000003032 molecular docking Methods 0.000 claims abstract description 34
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 27
- 239000000945 filler Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 abstract description 7
- 238000007689 inspection Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000004927 fusion Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012372 quality testing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
- H04R9/08—Microphones
-
- 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
- H04R2410/00—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
A kind of split type high intensity receiver proposed by the present invention,Including receiver top and receiver bottom,Receiver top includes upper shell,Vibrating diaphragm,Voice coil loudspeaker voice coil and torsion are covered,The receiver bottom includes lower house and magnet,Receiver top and receiver bottom pass through screw threads for fastening,And pass through docking groove,Block seals,Vibrating diaphragm is gripped by adapter sleeve and notch halfpace,And it is bonded reinforcing,Vibrating diaphragm includes fixed part and pars intermedia,Fixed part is provided with the raised bonding pad of band connection,Set in pars intermedia and strengthen groove and reinforcing projection,Connection groove is set between fixed part and pars intermedia,Receiver is divided into two up and down by the present invention,Separated time produces,It is not only easy for installation,Improve serious forgiveness,Vibrating diaphragm rigidity can be improved by strengthening groove and strengthening projection,It is hardly damaged,The setting of connection bump,The fixed-area of vibrating diaphragm can be effectively improved,Improve bonding strength,It is difficult for drop-off,It is plane to connect groove lower surface simultaneously,After voice coil loudspeaker voice coil connection,Facilitate quality inspection.
Description
Technical field
The present invention relates to receiver production field, particularly a kind of split type high intensity receiver.
Background technology
Cell-phone receiver is a kind of electro-acoustic element for converting electrical energy into acoustic energy, is exactly briefly generator, at present mobile phone
The receiver used is mostly moving coil receiver, and its surrounding air is driven using the mutual motive force between magnetic field and current－carrying conductor
Vibration and produce sound wave, and wherein described current－carrying conductor is exactly the oscillating component of receiver, and oscillating component is by vibrating diaphragm and sound
Circle composition.
The receiver now used, mostly single current formula produce, that is, on the basis of mono-hull, successively from inside to outside
Installation, due to the production requirement of pipeline system, in process of production, certain necessary quality testing can only be in most of completion
After carry out quality testing, in the process of reproduction, a certain process error, be easy for causing batch type to be scrapped, serious forgiveness is low, together
When, the problem of traditional vibrating diaphragm generally existing is rigidly insufficient, generally use is bonded the mode of top dome, carries out rigid raising, but
In manufacturing process, the situation of top dome position skew is of common occurrence, while as the use of receiver, top dome can also be fallen off,
The quality and service life of receiver are had a strong impact on, meanwhile, after traditional vibrating diaphragm connects with voice coil loudspeaker voice coil, voice coil position is using artificial mostly
Quality inspection, during quality inspection, except non-location deviate it is larger, it is otherwise more difficult to find, quality inspection difficulty be present.
The content of the invention
The present invention is in view of the above-mentioned problems, disclose a kind of split type high intensity receiver.
Specific technical scheme is as follows：
A kind of split type high intensity receiver, including receiver top and receiver bottom, it is characterised in that on the receiver
Portion includes upper shell, vibrating diaphragm, voice coil loudspeaker voice coil and turns round lid, and the receiver bottom includes lower house and magnet；The upper shell is in cylinder
Shape, its upper end are provided with notch halfpace, and lower end is provided with upper contiguous block, and the side wall of the notch halfpace is provided with internal thread；
The vibrating diaphragm is rectangle, including the fixed part in outside and the pars intermedia in center, and the fixed part and pars intermedia are integrated
Formula structure；The lower surface of the fixed part is provided with multiple bonding pads, and the multiple bonding pad is symmetric, set on bonding pad
There are multiple connection bumps, the multiple connection bump is uniformly arranged at equal intervals；It is provided with the pars intermedia and strengthens groove and reinforcing
Projection, the reinforcing groove are surround in a ring, protrude from vibrating diaphragm lower surface, its lower surface semicircular in shape, the reinforcing projection position
In in the annular that reinforcing groove is in, quantity is multiple, strengthens projection and protrudes from vibrating diaphragm lower surface, its lower surface is plane；Institute
State and connection groove is provided between fixed part and pars intermedia, the connection groove includes the arcuate furrow of both sides and middle straight line ditch
Groove, the arcuate furrow and straight-line groove interconnect, and the lower surface for connecting groove is plane；
The lid of turning round is rounded, and its lower end is provided with adapter sleeve, and the outer wall of the adapter sleeve is provided with external screw thread, turns round lid and upper shell
Threaded connection, the fixed position are gripped, and glue between adapter sleeve and notch halfpace by adapter sleeve and notch halfpace
Connect reinforcing；
The magnet is fixedly installed on the middle part of lower house, and is fixedly connected by epoxy resin with lower house, the lower house
Upper end be provided with lower connecting block；
The upper contiguous block and lower connecting block correspondingly agree with, and are connected through a screw thread, upper contiguous block be provided with the first docking groove and
Second docking groove, first docking groove are in annular, its section semicircular in shape, and second docking groove is in annular, its section
Face is rectangle, and the rectangular top that its section is in is semicircle, and the lower connecting block is provided with the first docking block and the
Two docking blocks, the first docking block and the second docking block respectively with the first docking groove, the second docking groove is corresponding agrees with, first pair
It is in annular to connect block, and protrudes from the upper surface of lower connecting block, its section semicircular in shape, and the second docking block is in annular, and convex
For the upper surface of lower connecting block, its section is rectangle, and the rectangular top that its section is in is semicircle；
Further, bayonet socket is provided with rectangular four angles that the vibrating diaphragm is in；
Further, the connection bump is hemispherical, and protrudes from vibrating diaphragm lower surface；
Further, the reinforcing groove is oval；
Further, the reinforcing projection is square, and is uniformly arranged at equal intervals between multiple reinforcing projections；
Further, the arcuate furrow semicircular in shape；
Further, the diameter that the be in center of circle is covered in the torsion is consistent with the cylindrical diameter that upper shell is in；
Further, the middle part for turning round lid is provided with cover net；
Further, sound absorption filler is fixed with the lower house, the sound absorption filler is located in magnet.
Beneficial effects of the present invention are：
A kind of split type high intensity receiver proposed by the present invention, including receiver top and receiver bottom, receiver top
Including upper shell, vibrating diaphragm, voice coil loudspeaker voice coil and lid is turned round, the receiver bottom includes lower house and magnet, receiver top and receiver
Bottom is sealed by screw threads for fastening, and by docking groove, block, and vibrating diaphragm is gripped by adapter sleeve and notch halfpace, and is bonded
Reinforce, vibrating diaphragm includes fixed part and pars intermedia, and fixed part is provided with the raised bonding pad of band connection, reinforcing groove is set in pars intermedia
With strengthen projection, between fixed part and pars intermedia set connection groove, the present invention it is simple in construction, by receiver be divided into up and down two
Portion, separated time production is not only easy for installation, improves serious forgiveness, and vibrating diaphragm rigidity can be improved by strengthening groove and strengthening projection, not rapid wear
It is bad, the setting of connection bump, the fixed-area of vibrating diaphragm can be effectively improved, improves bonding strength, it is difficult for drop-off, while connect groove
Lower surface is plane, and after voice coil loudspeaker voice coil connection, position is easy to observe, and facilitates quality inspection.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is a-quadrant enlarged drawing in Fig. 1.
Fig. 3 is vibrating diaphragm top view.
Fig. 4 is vibrating diaphragm upward view.
Fig. 5 is B-B direction sectional view in Fig. 3.
Fig. 6 is receiver top plan view（Covered without turning round）.
Embodiment
To make technical scheme become apparent from clearly, the present invention is described further below in conjunction with the accompanying drawings,
Any scheme drawn to the technical characteristic progress equivalencing of technical solution of the present invention and conventional reasoning each falls within guarantor of the present invention
Protect scope.
Embodiment one
A kind of split type high intensity receiver as depicted, including receiver top 1 and receiver bottom 2, it is characterised in that
The receiver top 1 includes upper shell 3, vibrating diaphragm 4, voice coil loudspeaker voice coil 5 and turns round lid 6, and the receiver bottom 2 includes lower house 7 and magnetic
Body 8；The upper shell 3 is provided with notch halfpace 9 in cylinder, its upper end, and lower end is provided with upper contiguous block 10, the notch halfpace 9
Side wall be provided with internal thread；
The vibrating diaphragm 4 is rectangle, including the fixed part 42 in outside and the pars intermedia 43 in center, the fixed part 42 and pars intermedia
43 be integral type structure；The lower surface of the fixed part 42 is provided with multiple bonding pads 44, and the multiple bonding pad 44 is in symmetrical
Distribution, bonding pad 44 are provided with multiple connection bumps 45, and the multiple connection bump 45 is uniformly arranged at equal intervals；The pars intermedia
It is provided with 43 and strengthens groove 46 and strengthen projection 47, the reinforcing groove 46 is surround in a ring, protrudes from the lower surface of vibrating diaphragm 44, its
Lower surface semicircular in shape, for the projection 47 of strengthening in the annular that reinforcing groove 46 is in, quantity is multiple, strengthens projection 47
The lower surface of vibrating diaphragm 44 is protruded from, its lower surface is plane；Connection groove 48, institute are provided between the fixed part 42 and pars intermedia 43
Stating connection groove 48 includes the arcuate furrow 49 of both sides and middle straight-line groove 410, the arcuate furrow 49 and straight-line groove
410 interconnect, and the lower surface for connecting groove 48 is plane；
The torsion lid 6 is rounded, and its lower end is provided with adapter sleeve 15, and the outer wall of the adapter sleeve 15 is provided with external screw thread, torsion lid 6 and
Upper shell 3 is threadedly coupled, and the fixed part 42 passes through adapter sleeve 15 and notch ladder between adapter sleeve 15 and notch halfpace 9
Platform 9 grips, and is bonded reinforcing；
The magnet 8 is fixedly installed on the middle part of lower house 7, and is fixedly connected by epoxy resin 17 with lower house 7, under described
The upper end of housing 7 is provided with lower connecting block 18；
The upper contiguous block 10 and lower connecting block 18 are corresponding to be agreed with, and is connected through a screw thread, and upper contiguous block 10 is provided with first pair
The docking groove 20 of access slot 19 and second, first docking groove 19 are in annular, its section semicircular in shape, second docking groove 20
In annular, its section is rectangle, and the rectangular top that its section is in is semicircle, and the lower connecting block 18 is provided with
First docking block 21 and second dock block 22, it is described first docking block 21 and second dock block 22 respectively with the first docking groove 19,
Second docking groove 20 is corresponding to be agreed with, and the first docking block 21 is in annular, and protrudes from the upper surface of lower connecting block 18, and its section is in
Semicircle, the second docking block 22 is in annular, and protrudes from the upper surface of lower connecting block 18, and its section is rectangle, its section
The rectangular top for being in is semicircle；
Further, bayonet socket 411 is provided with rectangular four angles that the vibrating diaphragm 4 is in；
Further, the connection bump 45 is hemispherical, and protrudes from the lower surface of vibrating diaphragm 44；
Further, the reinforcing groove 46 is oval；
Further, the reinforcing projection 47 is square, and is uniformly arranged at equal intervals between multiple reinforcing projections 47；
Further, the semicircular in shape of arcuate furrow 49；
Further, the diameter in the center of circle that the torsion lid 6 is in is consistent with the cylindrical diameter that upper shell 3 is in；
Further, the middle part for turning round lid 6 is provided with cover net 23；
Further, sound absorption filler 24 is fixed with the lower house 7, the sound absorption filler 24 is located in magnet 8.
A kind of split type high intensity receiver proposed by the present invention, including receiver top and receiver bottom, receiver
Top includes upper shell, vibrating diaphragm, voice coil loudspeaker voice coil and turns round lid, and the receiver bottom includes lower house and magnet, receiver top and by
Device bottom to be talked about by screw threads for fastening, and is sealed by docking groove, block, vibrating diaphragm is gripped by adapter sleeve and notch halfpace, and
Bonding is reinforced, and vibrating diaphragm includes fixed part and pars intermedia, and fixed part is provided with the raised bonding pad of band connection, reinforcing is set in pars intermedia
Groove and reinforcing projection, set connection groove between fixed part and pars intermedia, the present invention is simple in construction, and receiver is divided into up and down
Two, separated time production is not only easy for installation, improves serious forgiveness, and vibrating diaphragm rigidity can be improved by strengthening groove and strengthening projection, be not easy
Damage, the setting of connection bump, the fixed-area of vibrating diaphragm can be effectively improved, improves bonding strength, it is difficult for drop-off, while connection ditch
Groove lower surface is plane, and after voice coil loudspeaker voice coil connection, position is easy to observe, and facilitates quality inspection.
Embodiment two
Vibrating diaphragm described in embodiment one is plastics vibrating diaphragm, and its material is PET and glass fibre, and its preparation method is as follows：
（1）, choose REINFORCED PET plastic grain, and put into fusion apparatus；
（2）, persistently fusion apparatus inside is vacuumized, until the vacuum inside fusion apparatus is in below 100Pa, and tie up
Hold, meanwhile, start fusion apparatus, PET particle is melted；
（3）, treat that PET particle is completely melt, it is online to add the glass fibre for accounting for PET particle gross mass 20%, continue plus
Heat, and with being slowly stirred, stir speed (S.S.) control is in 30r/min, until glass fibre melts and mixed with PET completely
It is even, obtain fused solution；
（4）, by step（3）Obtained fused solution, it is three-layer co-extruded to deliver to MCP, and draws and stretch in vibrating diaphragm sheet material；
（5）, then obtained vibrating diaphragm sheet material is delivered in thermal forming device, compression molding, produce vibrating diaphragm finished product.
The more existing vibrating diaphragm of plastics vibrating diaphragm is compared made from the present embodiment, and plasticity is high, and it is low and obtained to be not only molded difficulty
Vibrating diaphragm finished product material it is rigidly preferable, be hardly damaged, and cost is low, be adapted to most of middle and high end receivers.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all cover within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection domain of claims
It is defined.
Claims (9)
1. a kind of split type high intensity receiver, including receiver top and receiver bottom, it is characterised in that the receiver
Top includes upper shell, vibrating diaphragm, voice coil loudspeaker voice coil and turns round lid, and the receiver bottom includes lower house and magnet；The upper shell is in circle
Cylindricality, its upper end are provided with notch halfpace, and lower end is provided with upper contiguous block, and the side wall of the notch halfpace is provided with internal thread；
The vibrating diaphragm is rectangle, including the fixed part in outside and the pars intermedia in center, and the fixed part and pars intermedia are integrated
Formula structure；The lower surface of the fixed part is provided with multiple bonding pads, and the multiple bonding pad is symmetric, set on bonding pad
There are multiple connection bumps, the multiple connection bump is uniformly arranged at equal intervals；It is provided with the pars intermedia and strengthens groove and reinforcing
Projection, the reinforcing groove are surround in a ring, protrude from vibrating diaphragm lower surface, its lower surface semicircular in shape, the reinforcing projection position
In in the annular that reinforcing groove is in, quantity is multiple, strengthens projection and protrudes from vibrating diaphragm lower surface, its lower surface is plane；Institute
State and connection groove is provided between fixed part and pars intermedia, the connection groove includes the arcuate furrow of both sides and middle straight line ditch
Groove, the arcuate furrow and straight-line groove interconnect, and the lower surface for connecting groove is plane；
The lid of turning round is rounded, and its lower end is provided with adapter sleeve, and the outer wall of the adapter sleeve is provided with external screw thread, turns round lid and upper shell
Threaded connection, the fixed position are gripped, and glue between adapter sleeve and notch halfpace by adapter sleeve and notch halfpace
Connect reinforcing；
The magnet is fixedly installed on the middle part of lower house, and is fixedly connected by epoxy resin with lower house, the lower house
Upper end be provided with lower connecting block；
The upper contiguous block and lower connecting block correspondingly agree with, and are connected through a screw thread, upper contiguous block be provided with the first docking groove and
Second docking groove, first docking groove are in annular, its section semicircular in shape, and second docking groove is in annular, its section
Face is rectangle, and the rectangular top that its section is in is semicircle, and the lower connecting block is provided with the first docking block and the
Two docking blocks, the first docking block and the second docking block respectively with the first docking groove, the second docking groove is corresponding agrees with, first pair
It is in annular to connect block, and protrudes from the upper surface of lower connecting block, its section semicircular in shape, and the second docking block is in annular, and convex
For the upper surface of lower connecting block, its section is rectangle, and the rectangular top that its section is in is semicircle.
A kind of 2. split type high intensity receiver as claimed in claim 1, it is characterised in that the rectangle that the vibrating diaphragm is in
Four angles at be provided with bayonet socket.
3. a kind of split type high intensity receiver as claimed in claim 1, it is characterised in that the connection bump is in hemisphere
Shape, and protrude from vibrating diaphragm lower surface.
4. a kind of split type high intensity receiver as claimed in claim 1, it is characterised in that the reinforcing groove is in ellipse
Shape.
A kind of 5. split type high intensity receiver as claimed in claim 1, it is characterised in that the reinforcing projection is square,
And it is uniformly arranged at equal intervals between multiple reinforcing projections.
6. a kind of split type high intensity receiver as claimed in claim 1, it is characterised in that the arcuate furrow is in semicircle
Shape.
7. a kind of split type high intensity receiver as claimed in claim 1, it is characterised in that described turn round covers the be in center of circle
Diameter is consistent with the cylindrical diameter that upper shell is in.
8. a kind of split type high intensity receiver as claimed in claim 1, it is characterised in that the middle part for turning round lid is provided with cover
Net.
9. a kind of split type high intensity receiver as claimed in claim 1, it is characterised in that be fixed with the lower house
Absorb sound filler, and the sound absorption filler is located in magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405523.4A CN107889037A (en) | 2017-12-22 | 2017-12-22 | A kind of split type high intensity receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405523.4A CN107889037A (en) | 2017-12-22 | 2017-12-22 | A kind of split type high intensity receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107889037A true CN107889037A (en) | 2018-04-06 |
Family
ID=61772235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711405523.4A Pending CN107889037A (en) | 2017-12-22 | 2017-12-22 | A kind of split type high intensity receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107889037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113738A1 (en) * | 2018-12-07 | 2020-06-11 | 歌尔股份有限公司 | Sound-emitting device and processing method used for diaphragm assembly of sound-emitting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11205877A (en) * | 1998-01-16 | 1999-07-30 | Aichi Casio Kk | Receiver |
| TW559420U (en) * | 2002-11-11 | 2003-10-21 | Merry Electronics Co Ltd | Receiver |
| JP2009082878A (en) * | 2007-10-02 | 2009-04-23 | Sony Corp | Vibration body, input device with tactile function and electronic device |
| CN206413137U (en) * | 2016-09-29 | 2017-08-15 | 东莞市顺络实业有限公司 | A new type of receiver that is easy to disassemble |
| CN206575597U (en) * | 2017-03-23 | 2017-10-20 | 江西联创宏声电子股份有限公司 | New-type loudspeaker module |
-
2017
- 2017-12-22 CN CN201711405523.4A patent/CN107889037A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11205877A (en) * | 1998-01-16 | 1999-07-30 | Aichi Casio Kk | Receiver |
| TW559420U (en) * | 2002-11-11 | 2003-10-21 | Merry Electronics Co Ltd | Receiver |
| JP2009082878A (en) * | 2007-10-02 | 2009-04-23 | Sony Corp | Vibration body, input device with tactile function and electronic device |
| CN206413137U (en) * | 2016-09-29 | 2017-08-15 | 东莞市顺络实业有限公司 | A new type of receiver that is easy to disassemble |
| CN206575597U (en) * | 2017-03-23 | 2017-10-20 | 江西联创宏声电子股份有限公司 | New-type loudspeaker module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113738A1 (en) * | 2018-12-07 | 2020-06-11 | 歌尔股份有限公司 | Sound-emitting device and processing method used for diaphragm assembly of sound-emitting device |
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