CN107360524A - Push-pull microphone - Google Patents
Push-pull microphone Download PDFInfo
- Publication number
- CN107360524A CN107360524A CN201710843220.4A CN201710843220A CN107360524A CN 107360524 A CN107360524 A CN 107360524A CN 201710843220 A CN201710843220 A CN 201710843220A CN 107360524 A CN107360524 A CN 107360524A
- Authority
- CN
- China
- Prior art keywords
- voice coil
- loudspeaker voice
- coil loudspeaker
- vibrating diaphragm
- washer
- 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.)
- Pending
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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
- 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
The present invention relates to a kind of push-pull microphone, including magnetic structure, connecting seat, the first voice coil loudspeaker voice coil, the first frame, the second voice coil loudspeaker voice coil and the second frame.Above-mentioned push-pull microphone, the first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil are arranged in the magnetic gap of magnetic structure, and the first voice coil loudspeaker voice coil is fixedly connected with the second voice coil loudspeaker voice coil.Under the influence of a magnetic field, the first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil are moved together, and the first vibrating diaphragm of dress and the second vibrating diaphragm are moved together so as to drive, and are reached one and are promoted an effect being pulled so that vibration more balances, and reduces low-frequency distortion.The first vibrating diaphragm, connecting seat, the second vibrating diaphragm surround resonant cavity simultaneously, can filter medium-high frequency response component, ensure that low frequency tonequality.
Description
Technical field
The present invention relates to speaker technology field, more particularly to a kind of push-pull microphone.
Background technology
Loudspeaker is a kind of conventional electro-acoustic transducer device, is widely used to TV, computer, automobile, mobile phone etc.
In equipment.Loudspeaker promotes voice coil loudspeaker voice coil pipe to move by magnetic field, so as to drive vibrating diaphragm to send sound.Conventional subwoofer one
As use conventional loudspeakers structure, although cost is low, technique is simple, often occurs that vibration is unbalanced to ask during its work
Topic, causes low-frequency distortion big, low frequency lower tone.
The content of the invention
Based on this, the defects of the invention reside in prior art is overcome, there is provided a kind of push-pull microphone, reduce low frequency and lose
Very, low frequency tonequality is improved.
A kind of push-pull microphone, including magnetic structure, connecting seat, the first voice coil loudspeaker voice coil, the first frame, the second voice coil loudspeaker voice coil and second
Frame, the magnetic structure are arranged in connecting seat, and the magnetic structure has magnetic gap, and first voice coil loudspeaker voice coil is arranged on described
In magnetic gap, the connecting seat is fixed in first frame, and first frame is provided with the first vibrating diaphragm, and described first shakes
Film is connected with first voice coil loudspeaker voice coil, and second frame is fixed on the connecting seat, and second frame is shaken provided with second
Film, second vibrating diaphragm are connected with second voice coil loudspeaker voice coil, and first voice coil loudspeaker voice coil is fixedly connected with second voice coil loudspeaker voice coil, and described first
Vibrating diaphragm is oppositely arranged with second vibrating diaphragm, and first vibrating diaphragm, connecting seat, the second vibrating diaphragm surround resonant cavity.
Above-mentioned push-pull microphone, the first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil are arranged in the magnetic gap of magnetic structure, and the first sound
Circle is fixedly connected with the second voice coil loudspeaker voice coil.Under the influence of a magnetic field, the first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil move together, so as to drive to dress
First vibrating diaphragm and the second vibrating diaphragm move together, reach one and are promoted an effect being pulled so that vibration more balances, and reduces
Low-frequency distortion.The first vibrating diaphragm, connecting seat, the second vibrating diaphragm surround resonant cavity simultaneously, can filter medium-high frequency response component, ensure
Low frequency tonequality.
In one of the embodiments, the magnetic structure includes the first washer, magnet, the second washer and magnetic guiding loop, institute
State the first washer, magnet, the second washer and fold successively and set, the magnetic guiding loop is set in outside the first washer, magnet, the second washer and formed
The magnetic gap, first voice coil loudspeaker voice coil are arranged between first washer and the magnetic guiding loop, and second voice coil loudspeaker voice coil is arranged on
Between second washer and the magnetic guiding loop.Magnetic field is returned to magnetic from magnet after the first washer, magnetic guiding loop, the second washer
Ring.First voice coil loudspeaker voice coil is arranged between the first washer and magnetic guiding loop, and the first washer provides uniform magnetic field for the motion of the first voice coil loudspeaker voice coil, improves
The tonequality of loudspeaker.Second voice coil loudspeaker voice coil is arranged between the second washer and magnetic guiding loop, and the second washer provides for the motion of the second voice coil loudspeaker voice coil
Even magnetic field, improve the tonequality of loudspeaker.
In one of the embodiments, the connecting seat is hollow sleeve, and first frame is fixed on the hollow sleeve
One end of cylinder, second frame are fixed on the other end of the hollow sleeve, and the inwall of the hollow sleeve is provided with dividing plate,
The dividing plate is provided with mounting hole, and the magnetic guiding loop is arranged in the mounting hole, and the outer wall of the magnetic guiding loop is provided with support
Boss, the support rim abut with the dividing plate.First frame, the second frame are separately fixed at the both ends of hollow sleeve, knot
Structure is compact.Magnetic guiding loop is spacing in the mounting hole of dividing plate by support rim, easy to assembly.
In one of the embodiments, first voice coil loudspeaker voice coil includes the first induction coil and the first voice coil loudspeaker voice coil pipe, and described first
Induction coil is set in outside the first voice coil loudspeaker voice coil pipe, and first vibrating diaphragm is connected with the first voice coil loudspeaker voice coil pipe, first sensing
Coil is arranged between first washer and the magnetic guiding loop, and second voice coil loudspeaker voice coil includes the second induction coil and the second voice coil loudspeaker voice coil
Pipe, second induction coil are set in outside the second voice coil loudspeaker voice coil pipe, and second vibrating diaphragm is connected with the second voice coil loudspeaker voice coil pipe, institute
State the second induction coil to be arranged between second washer and the magnetic guiding loop, first induction coil and the described second sense
Answer the winding of coil in opposite direction, the first voice coil loudspeaker voice coil pipe is fixedly connected with the second voice coil loudspeaker voice coil pipe.First induction coil and
Two induction coils move together under the influence of a magnetic field, so as to be driven by the first voice coil loudspeaker voice coil pipe being fixedly connected and the second voice coil loudspeaker voice coil pipe
First vibrating diaphragm and the second vibrating diaphragm move together, realize balance vibration, reduce low-frequency distortion.
In one of the embodiments, the first voice coil loudspeaker voice coil pipe and the second voice coil loudspeaker voice coil pipe are formed in one structure, can be same
When drive the first vibrating diaphragm and the second vibrating diaphragm to move together, improve robust motion, ensure vibration balancing.
In one of the embodiments, the one end of the second voice coil loudspeaker voice coil pipe away from the first voice coil loudspeaker voice coil pipe is provided with dust cap,
Dust is avoided to enter the tonequality for influenceing loudspeaker.
In one of the embodiments, first frame is provided with cushion block, and first washer is fixed on the cushion block
On.The first washer, magnet, the second washer are supported using cushion block, the first voice coil loudspeaker voice coil just can preferably be set with the second voice coil loudspeaker voice coil
In magnetic gap.
In one of the embodiments, the cushion block is non-magnetic cushion block, avoids impacting magnetic circuit, lifts loudspeaker
Tonequality.
In one of the embodiments, the cushion block is aluminium cushion block, in light weight, and cost is relatively low.
In one of the embodiments, the push-pull microphone also involves the second bullet ripple including the first bullet, and described first
Play ripple to be set in outside the first voice coil loudspeaker voice coil pipe and be fixed in first frame, the second bullet ripple is set in second sound
Circle pipe is outer and is fixed in second frame.Ripple and second is played using first to play at wave energy the first voice coil loudspeaker voice coil of holding and the second voice coil loudspeaker voice coil
In the correct position of magnetic gap, ensure the acoustical quality of loudspeaker.
Brief description of the drawings
Fig. 1 is the structural representation of the push-pull microphone described in the embodiment of the present invention.
Description of reference numerals：
10th, magnetic structure, 100, magnetic gap, the 110, first washer, 120, magnet, the 130, second washer, 140, magnetic guiding loop,
141st, support rim, 20, connecting seat, 200, resonant cavity, 210, dividing plate, 211, mounting hole, 212, through hole, the 30, first voice coil loudspeaker voice coil,
300th, the first induction coil, the 310, first voice coil loudspeaker voice coil pipe, the 40, first frame, the 400, first vibrating diaphragm, the 50, second voice coil loudspeaker voice coil, 500, second
Induction coil, the 510, second voice coil loudspeaker voice coil pipe, 520, dust cap, the 60, second frame, the 600, second vibrating diaphragm, 70, cushion block, the 80, first bullet
Ripple, 90, second plays ripple.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Add thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element be referred to as " directly existing " another element " on " when,
In the absence of intermediary element.Term as used herein " vertically ", " horizontal ", "left", "right" and similar statement are
For illustrative purposes, it is unique embodiment to be not offered as.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more
The arbitrary and all combination of related Listed Items.
With reference to shown in Fig. 1, the push-pull microphone described in the present embodiment, including magnetic structure 10, connecting seat 20, the first sound
Enclose the 30, first frame 40, the second voice coil loudspeaker voice coil 50 and the second frame 60.The magnetic structure 10 is arranged in connecting seat 20, the magnetic
Line structure 10 has magnetic gap 100.First voice coil loudspeaker voice coil 30 is arranged in the magnetic gap 100, and the connecting seat 20 is fixed on
In first frame 40, first frame 40 is provided with the first vibrating diaphragm 400, first vibrating diaphragm 400 and first sound
Circle 30 is connected.Second frame 60 is fixed on the connecting seat 20, and second frame 60 is provided with the second vibrating diaphragm 600,
Second vibrating diaphragm 600 is connected with second voice coil loudspeaker voice coil 50.First voice coil loudspeaker voice coil 30 is fixedly connected with second voice coil loudspeaker voice coil 50, institute
State the first vibrating diaphragm 400 to be oppositely arranged with second vibrating diaphragm 600, first vibrating diaphragm 400, connecting seat 20, the second vibrating diaphragm 600 enclose
Into resonant cavity 200.
Above-mentioned push-pull microphone, the first voice coil loudspeaker voice coil 30 and the second voice coil loudspeaker voice coil 50 are arranged in the magnetic gap 100 of magnetic structure 10,
And first voice coil loudspeaker voice coil 30 be fixedly connected with the second voice coil loudspeaker voice coil 50.Under the influence of a magnetic field, the first voice coil loudspeaker voice coil 30 and the second voice coil loudspeaker voice coil 50 1 start shipment
It is dynamic, the first vibrating diaphragm 400 of dress and the second vibrating diaphragm 600 are moved together so as to drive, reaches one and is promoted one to be pulled
Effect so that vibration more balances, and reduces low-frequency distortion.The first vibrating diaphragm 400, connecting seat 20, the second vibrating diaphragm 600 surround altogether simultaneously
Shake cavity 200, can filter medium-high frequency response component, ensure that low frequency tonequality.
Wherein, the magnetic structure 10 includes the first washer 110, magnet 120, the second washer 130 and magnetic guiding loop 140, institute
State the first washer 110, magnet 120, the second washer 130 successively fold set, the magnetic guiding loop 140 is set in the first washer 110, magnet
120th, form the magnetic gap 100 outside the second washer 130, first voice coil loudspeaker voice coil 30 be arranged on first washer 110 with it is described
Between magnetic guiding loop 140, second voice coil loudspeaker voice coil 50 is arranged between second washer 130 and the magnetic guiding loop 140.Magnetic field is from magnetic
Iron 120 is returned to magnet ring after the first washer 110, magnetic guiding loop 140, the second washer 130.First voice coil loudspeaker voice coil 30 is arranged on the first washer
Between 110 and magnetic guiding loop 140, the first washer 110 provides uniform magnetic field for the motion of the first voice coil loudspeaker voice coil 30, improves the tonequality of loudspeaker.
Second voice coil loudspeaker voice coil 50 is arranged between the second washer 130 and magnetic guiding loop 140, and the second washer 130 provides for the motion of the second voice coil loudspeaker voice coil 50
Even magnetic field, improve the tonequality of loudspeaker.Preferably, the magnet 120 is Ru-Fe-Mn magnet ring, has good mechanical property, energy
Power and the sensitivity of loudspeaker is greatly improved.
In the present embodiment, the connecting seat 20 is hollow sleeve, and first frame 40 is fixed on the hollow sleeve
One end, second frame 60 is fixed on the other end of the hollow sleeve, and the inwall of the hollow sleeve is provided with dividing plate
210, the dividing plate 210 is provided with mounting hole 211, and the magnetic guiding loop 140 is arranged in the mounting hole 211, the magnetic guiding loop
140 outer wall is provided with support rim 141, and the support rim 141 abuts with the dividing plate 210.First frame 40, the second basin
Frame 60 is separately fixed at the both ends of hollow sleeve, compact-sized.Magnetic guiding loop 140 is spacing in dividing plate 210 by support rim 141
It is easy to assembly in mounting hole 211.In addition, being additionally provided with through hole 212 on the dividing plate 210, dividing plate 210 is avoided to influence resonance effect.
In other embodiments, the connecting seat 20 and first frame 40 are formed in one structure, or the connecting seat 20 with
Second frame 60 is formed in one structure, is all feasible scheme.
Specifically, first voice coil loudspeaker voice coil 30 includes the first induction coil 300 and the first voice coil loudspeaker voice coil pipe 310, first sensing
Coil 300 is set in outside the first voice coil loudspeaker voice coil pipe 310, and first vibrating diaphragm 400 is connected with the first voice coil loudspeaker voice coil pipe 310, described
First induction coil 300 is arranged between first washer 110 and the magnetic guiding loop 140, and second voice coil loudspeaker voice coil 50 includes the
Two induction coils 500 and the second voice coil loudspeaker voice coil pipe 510, second induction coil 500 are set in outside the second voice coil loudspeaker voice coil pipe 510, institute
State the second vibrating diaphragm 600 with the second voice coil loudspeaker voice coil pipe 510 to be connected, second induction coil 500 is arranged on second washer 130
Between the magnetic guiding loop 140, the winding of first induction coil 300 and second induction coil 500 is in opposite direction, institute
The first voice coil loudspeaker voice coil pipe 310 is stated to be fixedly connected with the second voice coil loudspeaker voice coil pipe 510.First induction coil 300 and the second induction coil 500 exist
Moved together in the presence of magnetic field, so as to drive first to shake by the first voice coil loudspeaker voice coil pipe 310 being fixedly connected and the second voice coil loudspeaker voice coil pipe 510
The vibrating diaphragm 600 of film 400 and second moves together, realizes balance vibration, reduces low-frequency distortion.
Further, the first voice coil loudspeaker voice coil pipe 310 and the second voice coil loudspeaker voice coil pipe 510 are formed in one structure, can band simultaneously
Dynamic first vibrating diaphragm 400 and the second vibrating diaphragm 600 move together, improve robust motion, ensure vibration balancing.
Preferably, the one end of the second voice coil loudspeaker voice coil pipe 510 away from the first voice coil loudspeaker voice coil pipe 310 is provided with dust cap 520, avoids
Dust enters the tonequality for influenceing loudspeaker.
In the present embodiment, first frame 40 is provided with cushion block 70, and first washer 110 is fixed on the cushion block
On 70.First washer 110, magnet 120, the second washer 130 are supported using cushion block 70, the first voice coil loudspeaker voice coil 30 and the second voice coil loudspeaker voice coil
50 just can preferably be arranged in magnetic gap 100.The cushion block 70 is non-magnetic cushion block 70, avoids impacting magnetic circuit, carries
Rise the tonequality of loudspeaker.Alternatively, the cushion block 70 is aluminium cushion block 70, in light weight, and cost is relatively low.
Push-pull microphone described in the present embodiment also includes first and plays the bullet ripple 90 of ripple 80 and second, and described first plays ripple 80
It is outer and be fixed in first frame 40 to be set in the first voice coil loudspeaker voice coil pipe 310, the second bullet ripple 90 is set in described the
Outside two voice coil loudspeaker voice coil pipes 510 and it is fixed in second frame 60.The first sound can be kept by playing ripple 90 using the first bullet ripple 80 and second
The voice coil loudspeaker voice coil 50 of circle 30 and second is in 100 correct position of magnetic gap, ensures the acoustical quality of loudspeaker.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of push-pull microphone, it is characterised in that including magnetic structure, connecting seat, the first voice coil loudspeaker voice coil, the first frame, second
Voice coil loudspeaker voice coil and the second frame, the magnetic structure are arranged in connecting seat, and the magnetic structure has magnetic gap, first voice coil loudspeaker voice coil
It is arranged in the magnetic gap, the connecting seat is fixed in first frame, and first frame is provided with the first vibrating diaphragm,
First vibrating diaphragm is connected with first voice coil loudspeaker voice coil, and second frame is fixed on the connecting seat, in second frame
Provided with the second vibrating diaphragm, second vibrating diaphragm is connected with second voice coil loudspeaker voice coil, and first voice coil loudspeaker voice coil is fixed with second voice coil loudspeaker voice coil to be connected
Connect, first vibrating diaphragm is oppositely arranged with second vibrating diaphragm, and first vibrating diaphragm, connecting seat, the second vibrating diaphragm surround resonant cavity
Body.
2. push-pull microphone according to claim 1, it is characterised in that the magnetic structure includes the first washer, magnetic
Iron, the second washer and magnetic guiding loop, first washer, magnet, the second washer are folded set successively, and the magnetic guiding loop is set in the first China
Department, magnet, form the magnetic gap outside the second washer, first voice coil loudspeaker voice coil be arranged on first washer and the magnetic guiding loop it
Between, second voice coil loudspeaker voice coil is arranged between second washer and the magnetic guiding loop.
3. push-pull microphone according to claim 2, it is characterised in that the connecting seat is hollow sleeve, described
One frame is fixed on one end of the hollow sleeve, and second frame is fixed on the other end of the hollow sleeve, in described
The inwall of empty set is provided with dividing plate, and the dividing plate is provided with mounting hole, and the magnetic guiding loop is arranged in the mounting hole, described
The outer wall of magnetic guiding loop is provided with support rim, and the support rim abuts with the dividing plate.
4. push-pull microphone according to claim 2, it is characterised in that first voice coil loudspeaker voice coil includes the first induction coil
And the first voice coil loudspeaker voice coil pipe, first induction coil are set in outside the first voice coil loudspeaker voice coil pipe, first vibrating diaphragm and first sound
Circle pipe is connected, and first induction coil is arranged between first washer and the magnetic guiding loop, and second voice coil loudspeaker voice coil includes
Second induction coil and the second voice coil loudspeaker voice coil pipe, second induction coil are set in outside the second voice coil loudspeaker voice coil pipe, second vibrating diaphragm
It is connected with the second voice coil loudspeaker voice coil pipe, second induction coil is arranged between second washer and the magnetic guiding loop, described
The winding of first induction coil and second induction coil is in opposite direction, the first voice coil loudspeaker voice coil pipe and the second voice coil loudspeaker voice coil Guan Gu
Fixed connection.
5. push-pull microphone according to claim 4, it is characterised in that the first voice coil loudspeaker voice coil pipe and second voice coil loudspeaker voice coil
Pipe is formed in one structure.
6. push-pull microphone according to claim 4, it is characterised in that the second voice coil loudspeaker voice coil pipe is away from first sound
One end of circle pipe is provided with dust cap.
7. push-pull microphone according to claim 3, it is characterised in that first frame is provided with cushion block, described
First washer is fixed on the cushion block.
8. push-pull microphone according to claim 7, it is characterised in that the cushion block is non-magnetic cushion block.
9. push-pull microphone according to claim 8, it is characterised in that the cushion block is aluminium cushion block.
10. according to the push-pull microphone described in claim any one of 4-6, it is characterised in that also involve including the first bullet
Two play ripple, and the first bullet ripple is set in outside the first voice coil loudspeaker voice coil pipe and is fixed in first frame, and described second plays ripple
It is set in outside the second voice coil loudspeaker voice coil pipe and is fixed in second frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710843220.4A CN107360524A (en) | 2017-09-18 | 2017-09-18 | Push-pull microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710843220.4A CN107360524A (en) | 2017-09-18 | 2017-09-18 | Push-pull microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107360524A true CN107360524A (en) | 2017-11-17 |
Family
ID=60291550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710843220.4A Pending CN107360524A (en) | 2017-09-18 | 2017-09-18 | Push-pull microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107360524A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108632728A (en) * | 2018-06-25 | 2018-10-09 | 歌尔股份有限公司 | Microphone device and portable terminal |
| CN110996229A (en) * | 2019-12-09 | 2020-04-10 | 上海创功通讯技术有限公司 | Loudspeaker and electronic equipment |
| CN112738696A (en) * | 2020-12-28 | 2021-04-30 | 瑞声光电科技(常州)有限公司 | Loudspeaker |
| WO2021128009A1 (en) * | 2019-12-24 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Sound production device |
| WO2022062874A1 (en) * | 2020-09-25 | 2022-03-31 | 华为技术有限公司 | Loudspeaker and terminal |
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| CN110996229A (en) * | 2019-12-09 | 2020-04-10 | 上海创功通讯技术有限公司 | Loudspeaker and electronic equipment |
| WO2021128009A1 (en) * | 2019-12-24 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Sound production device |
| WO2022062874A1 (en) * | 2020-09-25 | 2022-03-31 | 华为技术有限公司 | Loudspeaker and terminal |
| CN112738696A (en) * | 2020-12-28 | 2021-04-30 | 瑞声光电科技(常州)有限公司 | Loudspeaker |
| CN112738696B (en) * | 2020-12-28 | 2023-01-31 | 瑞声光电科技(常州)有限公司 | Loudspeaker |
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