CN206042283U - Initiative noise control earphone - Google Patents
Initiative noise control earphone Download PDFInfo
- Publication number
- CN206042283U CN206042283U CN201620901242.2U CN201620901242U CN206042283U CN 206042283 U CN206042283 U CN 206042283U CN 201620901242 U CN201620901242 U CN 201620901242U CN 206042283 U CN206042283 U CN 206042283U
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- Prior art keywords
- noise
- voice coil
- housing
- loudspeaker
- noise control
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Abstract
The utility model relates to an initiative noise control earphone. Which comprises a housin. The audio frequency loudspeaker are connected with audio signal source, including installing first support in the casing, be located the setting and be in first voice coil loudspeaker voice coil in the magnetic field on the first support, with a voice coil connection fixes first vibrating diaphragm on the first support, the noise -stop device is including setting up noise control loudspeaker in the casing, with microphone and connection that the casing is connected are in the noise control loudspeaker with noise control circuit between the microphone, the noise control loudspeaker are including installing second support in the casing, be located the setting and be in second voice coil loudspeaker voice coil in the magnetic field on the second support, with the 2nd voice coil connection fixes second vibrating diaphragm on the second support. When eliminating ambient noise, can guarantee that audio signal is returned to the original condition or shape by the accuracy, prevent that opposition signal that the noise control circuit produced from to audio signal's interference, improving the sound quality of earphone.
Description
Technical field
This utility model is related to ear phone technology field, more particularly to a kind of active anti-noise earphone.
Background technology
The continuous lifting pursued for quality of the life with people and the fast development of science and technology, anti-noise earphone are got over
Come more consumers to receive and approve.As noise is shielded, can very easily using anti-noise earphone aircraft, subway,
Music is appreciated in the noisy environment such as train and market or is received calls.
Traditional anti-noise earphone is passive type anti-noise earphone, and the general physical characteristics using earphone are by external noise and ear
Isolation, by sound insulating material come blocking noise, but the amount of decrease of noise is limited, and soundproof effect is difficult to reach preferably requirement, changes
Anti-noise earphone after entering adopts active noise control, by arranging noise-stop device in earphone to offset external noise, due to audio frequency
Signal also passes through noise-stop device, and the bass that earphone is produced is elevated so that more dull, and past contact need to arrange EQ again
(equalizer, equalizer) is adjusting bass, but Adjustment effect can not meet expected requirement.
Utility model content
Based on this, it is necessary to provide it is a kind of can be while guaranteeing the active anti-noise earphone of acoustical quality and noise control effect.
A kind of active anti-noise earphone, including：
Housing；
Audio horn, is connected with audio signal source, including the first support in the housing, positioned at being arranged on
State the first voice coil loudspeaker voice coil in the magnetic field in first support and first voice coil loudspeaker voice coil is connected and fixed in the first support first
Vibrating diaphragm；
Noise-stop device, the mike, Yi Jilian including noise control loudspeaker and the housing connection being arranged in the housing
The anti-noise cancellation circuit being connected between the noise control loudspeaker and the mike；The noise control loudspeaker are included in the housing
Second support, the second voice coil loudspeaker voice coil in the magnetic field being arranged in the second support and second voice coil loudspeaker voice coil connect and fix
The second vibrating diaphragm in the second support.
Wherein in one embodiment, the back cover that the housing is included fore shell and is connected with the fore shell；The back cover
Installing rack for fixing the mike is inside installed, the collecting Mike between the installing rack and the back cover, is provided with
The installation cavity of wind, is further opened with being connected with the installation cavity on the back cover and leads sound for collect noise for the mike
Hole.
Wherein in one embodiment, high-frequency horn in the housing, is additionally provided with, the fore shell has leading note chamber, described
High-frequency horn is located at the leading note intracavity.
Wherein in one embodiment, the battery powered for the noise-stop device on the housing, is additionally provided with.
Wherein in one embodiment, the noise-stop device is also included for making the noise control loudspeaker and the anti-noise cancellation circuit
Connection or the controlling switch for disconnecting.
A kind of active anti-noise earphone, including：
Housing；
Audio horn, is connected with audio signal source, including the main body rack in the housing, positioned at being arranged on
State the first voice coil loudspeaker voice coil in the first magnetic field on main body rack and first voice coil loudspeaker voice coil is connected and fixed on the main body rack
First vibrating diaphragm；
Noise-stop device, including the noise control loudspeaker being arranged in the housing, the mike on the housing, Yi Jilian
The anti-noise cancellation circuit being connected between the noise control loudspeaker and the mike；The noise control loudspeaker include arranging on the main body rack
The second magnetic field in the second voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil be connected and fixed to the second vibrating diaphragm on the main body rack.
Wherein in one embodiment, the main body rack includes that the first installation portion is parallel with first installation portion and sets
The second installation portion put, the middle interconnecting piece being vertically connected between first installation portion and second installation portion；
It is provided with the first magnetic assembly on first installation portion, the inwall of first magnetic assembly and the middle interconnecting piece
The first annular space for limiting first magnetic field is formed between face, and first voice coil loudspeaker voice coil is located in the first annular space；
It is provided with the second magnetic assembly on second installation portion, the outer wall of second magnetic assembly and the middle interconnecting piece
The second annular space for limiting second magnetic field is formed between face, and second voice coil loudspeaker voice coil is located in second annular space.
Wherein in one embodiment, the back cover that the housing is included fore shell and is connected with the fore shell；The back cover
Installing rack for fixing the mike is inside installed, the collecting Mike between the installing rack and the back cover, is provided with
The installation cavity of wind, is further opened with being connected with the installation cavity on the back cover and leads sound for collect noise for the mike
Hole.
Wherein in one embodiment, high-frequency horn in the housing, is additionally provided with, the fore shell has leading note chamber, described
High-frequency horn is located at the leading note intracavity.
Wherein in one embodiment, the noise-stop device is also included for making the noise control loudspeaker and the anti-noise cancellation circuit
Connection or the controlling switch for disconnecting.
The active anti-noise earphone that this utility model is provided, audio horn are individually connected with audio signal source, and anti-noise cancellation circuit connects
Be connected between noise control loudspeaker and mike, i.e., the input of anti-noise cancellation circuit is connected with mike, the outfan of anti-noise cancellation circuit with it is anti-
Loudspeaker of making an uproar connect, and the audio signal towards audio horn is without anti-noise cancellation circuit.The circuit passed through by audio signal and noise control electricity
Road is completely separate, while environmental noise is eliminated, can guarantee that audio signal by accurate reproduction, prevents anti-noise cancellation circuit from producing
Interference of the inversion signal to audio signal, improve the sound quality of earphone.
Description of the drawings
Fig. 1 is the structural representation of the first embodiment of the first active anti-noise earphone；
Fig. 2 is the structural representation of the second embodiment of the first active anti-noise earphone；
Fig. 3 is the structural representation of another kind of active anti-noise earphone.
Specific embodiment
For the ease of understanding this utility model, this utility model is more fully retouched below with reference to relevant drawings
State.Better embodiment of the present utility model is given in accompanying drawing.But, this utility model can come in many different forms
Realize, however it is not limited to embodiments described herein.On the contrary, the purpose for providing these embodiments is to make to this practicality newly
It is more thorough comprehensive that the disclosure of type understands.
It should be noted that when element is referred to as " being fixed on " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " interior ", " outward ", "left", "right" and
For illustrative purposes only, it is unique embodiment to be not offered as similar statement.
Refering to Fig. 1, a kind of active anti-noise earphone, including housing 100, audio horn 200 and noise-stop device 300.Audio frequency loudspeaker
200 include first support 210, the first voice coil loudspeaker voice coil 220 and the first vibrating diaphragm 230.First support 210 is fixedly mounted in housing 100,
First voice coil loudspeaker voice coil 220 is located in the magnetic field in first support 210, and the first vibrating diaphragm 230 is connected with the first voice coil loudspeaker voice coil 220 and its two ends is fixed
In first support 210.Noise-stop device 300 includes noise control loudspeaker 310, mike 330 and anti-noise cancellation circuit 320.Noise control loudspeaker 310
It is fixed in housing 100, mike 330 is fixed on 100 rear portion of housing, anti-noise cancellation circuit 320 is connected to noise control loudspeaker 310 and Mike
Between wind 330.Noise control loudspeaker 310 include second support 311, the second voice coil loudspeaker voice coil 312 and the second vibrating diaphragm 313, and second support 311 is fixed
In housing 100, the second voice coil loudspeaker voice coil 312 is located in the magnetic field in second support 311, the second vibrating diaphragm 313 and the second voice coil loudspeaker voice coil 312
Connect and its two ends is fixed in second support 311.
It should be noted that first support 210 and second support 311 are two separate supports, audio horn 200
Individually be connected with audio signal source, the input of anti-noise cancellation circuit 320 is connected with mike 330, the outfan of anti-noise cancellation circuit 320 with
Noise control loudspeaker 310 connect, and the audio signal towards audio horn 200 is without anti-noise cancellation circuit 320.
For the convenience for manufacturing, installing and keep in repair, housing 100 includes the fore shell 110 and back cover that split links together
120, leading note chamber 111 is set on fore shell 110, the sent out sound of audio horn 200 will propagate from entering people from leading note chamber 111
Ear.Back cover 120 is provided with installing rack 410, and mike 330 is then fixed on installing rack 410, between installing rack 410 and back cover 120
Installation cavity 400 is provided with, whole mike 330 is contained in the installation cavity 400, in order that mike 330 can be collected well
Environmental noise, is further opened with being connected with installation cavity 400 on back cover 120 and leads acoustic aperture 121.
Audio horn 200 is responsible for the reduction of audio signal.And environmental noise Jing leads acoustic aperture 121 and enters in installation cavity 400, wheat
Gram wind 330 will collect environmental noise, and environmental noise is converted into the noise signal of telecommunication, and anti-noise cancellation circuit 320 is by the noise telecommunications for receiving
Number through identifying processing, while it is just contrary anti-phase to send, phase place identical with the noise electrical signal amplitude to noise control loudspeaker 310
This inversion signal is reduced into the sound that can just offset environmental noise for signal, noise control loudspeaker 310, and now, environmental noise will be by
Eliminate.
As the audio signal towards audio horn 200 is without anti-noise cancellation circuit 320, compared to existing technology, audio signal
The circuit for being passed through is completely separate with anti-noise cancellation circuit 320, while environmental noise is eliminated, can guarantee that audio signal is accurate
Really reduce, prevent interference of the inversion signal to audio signal, improve the sound quality of earphone.
Further, battery is additionally provided with housing 100, and battery is that noise-stop device 300 provides energy, and battery can be dry
Battery, or rechargeable battery, such as polymer Li-ion battery, also set up on housing 100 and can be provided with charging inlet,
For the charging of polymer Li-ion battery.
Controlling switch is additionally provided with noise-stop device 300, can be controlled between noise control loudspeaker 310 and anti-noise cancellation circuit 320
Connection disconnects, and when connecting between noise control loudspeaker 310 and anti-noise cancellation circuit 320, noise control loudspeaker 310 will send can offset environment and make an uproar
The sound of sound.When noise control loudspeaker 310 and anti-noise cancellation circuit 320 it is separated when, noise control loudspeaker 310 quit work, and earphone will lose
Noise control function.When earphone is receiving calls or during music, can open controlling switch, to eliminate environmental noise to useful sound
The interference of sound, in rest, it is also possible to which controlling switch is opened, and prevents from environmental noise to affect sleep.Certainly, earphone do not use or
When in comparatively quiet environment, controlling switch disconnects, and noise-stop device 300 enters energy-saving mode.
Refering to Fig. 2, in further embodiment, in the leading note chamber 111 of fore shell 110, high-frequency horn is provided with, high-frequency horn is
Dynamic ferrum loudspeaker 500, dynamic ferrum loudspeaker 500 are used for reducing high-frequency signal, can further improve the voice effect of earphone.
Refering to Fig. 1 to Fig. 3, this utility model also provides another active anti-noise earphone, this kind of anti-noise earphone with it is above-mentioned
Anti-noise earphone is differred primarily in that：Audio horn 200 and noise control loudspeaker 310 share a main body rack 600.This kind of noise control ear
Machine includes housing 100, audio horn 200 and noise-stop device 300.Audio horn 200 includes main body rack 600, the first voice coil loudspeaker voice coil 220
With the first vibrating diaphragm 230.Main body rack 600 is arranged in housing 100, and the first voice coil loudspeaker voice coil 220 is located at and is arranged on main body rack 600
In first magnetic field, the first vibrating diaphragm 230 is connected with the first voice coil loudspeaker voice coil 220 and its two ends is fixed on main body rack 600.Noise-stop device
300 include noise control loudspeaker 310, mike 330 and anti-noise cancellation circuit 320.Noise control loudspeaker 310 are fixed in housing 100, mike
330 are fixed on 100 rear portion of housing, and anti-noise cancellation circuit 320 is connected between noise control loudspeaker 310 and mike 330 (i.e. anti-noise cancellation circuit
320 input is connected with mike 330, and the outfan of anti-noise cancellation circuit 320 is connected with noise control loudspeaker 310).Noise control loudspeaker 310
Including main body rack 600, the second voice coil loudspeaker voice coil 312 and the second vibrating diaphragm 313, main body rack 600 is fixedly mounted in housing 100, and second
Voice coil loudspeaker voice coil 312 be located at be arranged in the second magnetic field on main body rack 600, the second vibrating diaphragm 313 be connected with the second voice coil loudspeaker voice coil 312 and its two
End is fixed on main body rack 600.
Significantly, since the shared main body racks 600 of both audio horn 200 and noise control loudspeaker 310, first
Vibrating diaphragm 230 and the second vibrating diaphragm 313 are each attached on the main body rack 600, further, the first vibrating diaphragm 230 and the second vibrating diaphragm 313
It is disposed opposite to each other on main body rack 600, i.e. the first vibrating diaphragm 230 and the second vibrating diaphragm 313 are separately positioned on the two of main body rack 600
End.A horn single body with double diaphragm is formed so, earphone assembling is more convenient, improves earphone packaging efficiency, while contracting
Microtia machine cavity body, reduces the cost of raw material and production cost, while also allowing for the assembling and maintenance of earphone.
Main body rack 600 includes the first installation portion 610, the second installation portion 620 and the middle interconnecting piece 630 being wholely set.
First installation portion 610 and the second installation portion 620 be arranged in parallel, and middle interconnecting piece 630 is vertically connected on the first installation portion 610 and
Between two installation portions 620.In other words, main body rack 600 has the disk of pit-holes (similar equivalent to its center punch forming
In the structure of straw hat), the bottom surface of pit-holes is then the first installation portion 610, and the side of pit-holes is middle interconnecting piece 630, disk
Upper remaining part is then the second installation portion 620.
The inwall of the first magnetic assembly 710, the first magnetic assembly 710 and middle interconnecting piece 630 is provided with first installation portion 610
First annular space 810 is formed between face, and first annular space 810 is used for limiting the first magnetic field, and the first voice coil loudspeaker voice coil 220 is located at first
In annular space 810.
The outer wall of the second magnetic assembly 720, the second magnetic assembly 720 and middle interconnecting piece 630 is provided with second installation portion 620
The second annular space 820 is formed between face, and the second annular space 820 is used for limiting the second magnetic field, and the second voice coil loudspeaker voice coil 312 is located at second
In annular space 820.
Housing 100 includes the fore shell 110 and back cover 120 that split links together, and arranges leading note chamber 111, sound on fore shell 110
The sent out sound of frequency loudspeaker 200 will propagate from entering human ear from leading note chamber 111.Back cover 120 is provided with installing rack 410, wheat
Gram wind 330 is then fixed on installing rack 410, is provided with installation cavity 400, whole mike between installing rack 410 and back cover 120
330 are contained in the installation cavity 400, in order that mike 330 can collect environmental noise well, are further opened with back cover 120
Connect with installation cavity 400 and lead acoustic aperture 121.
Audio horn 200 is responsible for the reduction of audio signal.And environmental noise Jing leads acoustic aperture 121 and enters in installation cavity 400, wheat
Gram wind 330 will collect environmental noise, and environmental noise is converted into the noise signal of telecommunication, and anti-noise cancellation circuit 320 is by the noise telecommunications for receiving
Number through identifying processing, while it is just contrary anti-phase to send, phase place identical with the noise electrical signal amplitude to noise control loudspeaker 310
This inversion signal is reduced into the sound that can just offset environmental noise for signal, noise control loudspeaker 310, and now, environmental noise will be by
Eliminate.
As the audio signal towards audio horn 200 is without anti-noise cancellation circuit 320, compared to existing technology, audio signal
The circuit for being passed through is completely separate with anti-noise cancellation circuit 320, while environmental noise is eliminated, can guarantee that audio signal is accurate
Really reduce, prevent interference of the inversion signal to audio signal, improve the sound quality of earphone.
Further, battery is additionally provided with housing 100, and battery is that noise-stop device 300 provides energy, and battery can be dry
Battery, or rechargeable battery, such as polymer Li-ion battery, charging inlet is additionally provided with housing 100, for being polymerized
The charging of thing lithium ion battery.
Controlling switch is additionally provided with noise-stop device 300, can be controlled between noise control loudspeaker 310 and anti-noise cancellation circuit 320
Connection disconnects, and when connecting between noise control loudspeaker 310 and anti-noise cancellation circuit 320, noise control loudspeaker 310 will send can offset environment and make an uproar
The sound of sound.When noise control loudspeaker 310 and anti-noise cancellation circuit 320 it is separated when, noise control loudspeaker 310 quit work, and earphone will lose
Noise control function.When earphone is receiving calls or during music, can open controlling switch, to eliminate environmental noise to useful sound
The interference of sound, in rest, it is also possible to which controlling switch is opened, and prevents from environmental noise to affect sleep.Certainly, earphone do not use or
When in comparatively quiet environment, controlling switch disconnects, and noise-stop device 300 enters energy-saving mode.
Specifically, high-frequency horn is provided with the leading note chamber 111 of fore shell 110, and high-frequency horn is dynamic ferrum loudspeaker 500, moves ferrum
Loudspeaker 500 are used for reducing high-frequency signal, can further improve the voice effect of earphone.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making 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 of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, some deformations and improvement can also be made, these belong to
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be defined by claims.
Claims (10)
1. a kind of active anti-noise earphone, it is characterised in that include：
Housing；
Audio horn, is connected with audio signal source, including the first support in the housing, positioned at being arranged on described
What the first voice coil loudspeaker voice coil and first voice coil loudspeaker voice coil in the magnetic field on one support was connected and fixed in the first support first shakes
Film；
Noise-stop device, mike including the noise control loudspeaker that are arranged in the housing and housing connection and is connected to
Anti- noise cancellation circuit between the noise control loudspeaker and the mike；The noise control loudspeaker include in the housing second
Support, the second voice coil loudspeaker voice coil in the magnetic field being arranged in the second support and second voice coil loudspeaker voice coil are connected and fixed to institute
State the second vibrating diaphragm in second support.
2. active anti-noise earphone according to claim 1, it is characterised in that the housing include fore shell and with it is described
The back cover of fore shell connection；Installing rack for fixing the mike is installed in the back cover, the installing rack with it is described after
The installation cavity for housing the mike is provided between shell, is further opened with connecting with the installation cavity and being used for supplying on the back cover
What the mike collected noise leads acoustic aperture.
3. active anti-noise earphone according to claim 2, it is characterised in that be additionally provided with high-frequency horn in the housing,
The fore shell has leading note chamber, and the high-frequency horn is located at the leading note intracavity.
4. active anti-noise earphone according to claim 1, it is characterised in that be additionally provided with the housing as the noise control
The battery that device is powered.
5. active anti-noise earphone according to claim 1, it is characterised in that the noise-stop device also includes described for making
Noise control loudspeaker and the controlling switch of the noise control circuit communication or disconnection.
6. a kind of active anti-noise earphone, it is characterised in that include：
Housing；
Audio horn, is connected with audio signal source, including the main body rack in the housing, positioned at being arranged on the master
The first voice coil loudspeaker voice coil in the first magnetic field and first voice coil loudspeaker voice coil on body support frame is connected and fixed on the main body rack first
Vibrating diaphragm；
Noise-stop device, including the noise control loudspeaker being arranged in the housing, the mike on the housing and is connected to
Anti- noise cancellation circuit between the noise control loudspeaker and the mike；The noise control loudspeaker include arranging on the main body rack
The second voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil in two magnetic fields is connected and fixed to the second vibrating diaphragm on the main body rack.
7. active anti-noise earphone according to claim 6, it is characterised in that the main body rack include the first installation portion,
The second installation portion for be arrangeding in parallel with first installation portion, first installation portion is vertically connected on second installation portion
Between middle interconnecting piece；
Be provided with the first magnetic assembly on first installation portion, the internal face of first magnetic assembly and the middle interconnecting piece it
Between form the first annular space for limiting first magnetic field, first voice coil loudspeaker voice coil is located in the first annular space；
Be provided with the second magnetic assembly on second installation portion, the outside wall surface of second magnetic assembly and the middle interconnecting piece it
Between form the second annular space for limiting second magnetic field, second voice coil loudspeaker voice coil is located in second annular space.
8. active anti-noise earphone according to claim 6, it is characterised in that the housing include fore shell and with it is described
The back cover of fore shell connection；Installing rack for fixing the mike is installed in the back cover, the installing rack with it is described after
The installation cavity for housing the mike is provided between shell, is further opened with connecting with the installation cavity and being used for supplying on the back cover
What the mike collected noise leads acoustic aperture.
9. active anti-noise earphone according to claim 8, it is characterised in that be additionally provided with high-frequency horn in the housing,
The fore shell has leading note chamber, and the high-frequency horn is located at the leading note intracavity.
10. active anti-noise earphone according to claim 6, it is characterised in that the noise-stop device is also included for making
State the controlling switch of noise control loudspeaker and the noise control circuit communication or disconnection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620901242.2U CN206042283U (en) | 2016-08-18 | 2016-08-18 | Initiative noise control earphone |
| PCT/CN2017/098014 WO2018033133A1 (en) | 2016-08-18 | 2017-08-18 | Active noise canceling earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620901242.2U CN206042283U (en) | 2016-08-18 | 2016-08-18 | Initiative noise control earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206042283U true CN206042283U (en) | 2017-03-22 |
Family
ID=58307099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620901242.2U Active CN206042283U (en) | 2016-08-18 | 2016-08-18 | Initiative noise control earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206042283U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018033133A1 (en) * | 2016-08-18 | 2018-02-22 | 万魔声学科技有限公司 | Active noise canceling earphone |
| CN109104657A (en) * | 2018-07-26 | 2018-12-28 | 王永明 | Multi-loudspeaker active noise reduction earphone |
| TWI749988B (en) * | 2021-01-05 | 2021-12-11 | 固昌通訊股份有限公司 | Speaker unit with dual diaphragms and dual coils |
-
2016
- 2016-08-18 CN CN201620901242.2U patent/CN206042283U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018033133A1 (en) * | 2016-08-18 | 2018-02-22 | 万魔声学科技有限公司 | Active noise canceling earphone |
| CN109104657A (en) * | 2018-07-26 | 2018-12-28 | 王永明 | Multi-loudspeaker active noise reduction earphone |
| TWI749988B (en) * | 2021-01-05 | 2021-12-11 | 固昌通訊股份有限公司 | Speaker unit with dual diaphragms and dual coils |
| US11368793B1 (en) | 2021-01-05 | 2022-06-21 | Cotron Corporation | Speaker unit with dual diaphragms and dual coils |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 35th floor, block a, Tanglang City, 3333 Liuxian Avenue, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Wanmo acoustics Co.,Ltd. Address before: 518000 14th floor, east block, Tianliao building, Tanglang primary school, Xili Xueyuan Avenue, Nanshan District, Shenzhen City, Guangdong Province Patentee before: 1MORE Inc. |
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| CP03 | Change of name, title or address |