CN206602654U - A kind of multitone ring electro-acoustic product - Google Patents
A kind of multitone ring electro-acoustic product Download PDFInfo
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- CN206602654U CN206602654U CN201720268936.1U CN201720268936U CN206602654U CN 206602654 U CN206602654 U CN 206602654U CN 201720268936 U CN201720268936 U CN 201720268936U CN 206602654 U CN206602654 U CN 206602654U
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- voice coil
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- coil loudspeaker
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Abstract
The utility model discloses a kind of multitone ring electro-acoustic product, including housing, voice coil loudspeaker voice coil is provided with housing, voice coil loudspeaker voice coil includes at least three, multiple voice coil loudspeaker voice coils are electrically connected by two FPCB with external circuit, FPCB one end is provided with the inscribed pad electrically connected respectively with each voice coil loudspeaker voice coil, and the FPCB other end is provided with the external pad electrically connected with external circuit；Inscribed pad is equal with the quantity of external pad and consistent with the quantity of voice coil loudspeaker voice coil.After the lead of voice coil loudspeaker voice coil is electrically connected with FPCB because of this product, by the circuit of the printing on FPCB, voice coil loudspeaker voice coil is electrically connected with the external pad on FPCB, then electrically connected by external pad with external circuit realization.Electrical connection adjustment between the voice coil loudspeaker voice coil and external circuit of this product, can easily be realized by adjusting the external pad on FPCB.Therefore the utility model can obtain required impedance, deacclimatize the demand of different whole circuits.
Description
Technical field
The utility model is related to electro-acoustic product technical field, more particularly to a kind of multitone ring electro-acoustic product.
Background technology
Electro-acoustic product refers to the device that electric harmony is mutually changed, and it is to utilize electromagnetic induction, electrostatic induction or piezo-electric effect
Changed etc. to complete electroacoustic.And some electro-acoustic products include multiple voice coil loudspeaker voice coils, for the product of this multitone ring, pass through mostly at present
Adjust the connection in series-parallel relation of voice coil loudspeaker voice coil to adjust the impedance of product, to adapt to the demand of different terminals circuit.And existing multitone ring
Electro-acoustic product, is that product connection in series-parallel relation is adjusted by internal pads adjustment mostly.Once need the string to multitone ring product
Parallel relationship is adjusted, it is necessary to whole product is redesigned, it is necessary to take a significant amount of time manpower, cost is higher.
Utility model content
For above-mentioned deficiency, technical problem to be solved in the utility model is：A kind of multitone ring electro-acoustic product is provided, should
The connection in series-parallel that electro-acoustic product can be adjusted easily between voice coil loudspeaker voice coil by the external pad on double FPCB connects relation, adjustment product institute
The impedance needed, to adapt to the demand of different whole circuits, also a saving space, reduces the volume of product.
In order to solve the above technical problems, the technical solution of the utility model is：
Voice coil loudspeaker voice coil is provided with a kind of multitone ring electro-acoustic product, including housing, the housing, the voice coil loudspeaker voice coil includes at least three,
Multiple voice coil loudspeaker voice coils are electrically connected by two FPCB with external circuit, and one end of the FPCB is provided with electric with each voice coil loudspeaker voice coil respectively
The inscribed pad of connection, the other end of the FPCB is provided with the external pad electrically connected with the external circuit；The inscribed weldering
Disk is equal with the quantity of the external pad, and consistent with the quantity of the voice coil loudspeaker voice coil.
Preferred embodiment is that the multitone ring electro-acoustic product is the moving-magnetic type loudspeaker provided with three voice coil loudspeaker voice coils.
Preferred embodiment is that the housing of the moving-magnetic type loudspeaker includes the protecgulum and shell combination together,
Vibrating diaphragm and the oscillator being be arranged in parallel with the vibrating diaphragm, the oscillator are contained in the space that the protecgulum and the shell are surrounded
Including three voice coil loudspeaker voice coils；A fixed part is respectively stretched out in the bottom of the shell to the two ends of the shell, and the FPCB is provided with
One end of the external pad is fitted on the fixed part, and the FPCB is provided with one end of the inscribed pad, through institute
The side wall of shell is stated, is fitted on the bottom of the shell of the inside sidewalls.
Preferred embodiment is that the shell goes out acoustic aperture after being provided with, and the FPCB is provided with one end position of the inscribed pad
Go out after described at acoustic aperture, and the inscribed pad is naked is exposed on the external.
Preferred embodiment is, positioned at the middle voice coil loudspeaker voice coil lead respectively with an inscribed weldering described in two on FPCB
Disk is electrically connected, and the lead positioned at the voice coil loudspeaker voice coil of both sides is electrically connected with pad is inscribed described in the another two on the same FPCB
Connect.
Preferred embodiment is, the external weldering being connected with positioned at the inscribed pad of middle voice coil loudspeaker voice coil electrical connection
Disk and any external pad short circuit in external pad described in the another two on the same FPCB.
Preferred embodiment is, described in two on FPCB the external pad of non-short circuit respectively with the positive pole of the external circuit and
Negative pole is electrically connected, three voice coil loudspeaker voice coil concatenations.
Preferred embodiment is, the positive pole and negative pole of the external pad of non-short circuit respectively with external circuit on FPCB described in two
Electrical connection, the external pad of short circuit is electrically connected with the negative pole and positive pole of external circuit respectively, and three voice coil loudspeaker voice coils simultaneously connect.
Preferred embodiment is that the vibrating diaphragm is fixed with three blocks of drive magnets close to the side of the oscillator, respectively with three institutes
The center for stating voice coil loudspeaker voice coil is correspondingly arranged；The direction of magnetization of each drive magnet be it is vertical, positioned at center the drive magnet with
The direction of magnetization positioned at drive magnet described in the two of both sides is opposite；The voice coil loudspeaker voice coil forms electromagnet after being powered, with the driving magnetic
Iron produces interaction force and drives the vibrating diaphragm driving sounding.
Preferred embodiment is that side of the oscillator away from the vibrating diaphragm is provided with two pieces of motor magnets, each motor magnet
The direction of magnetization be vertical, and voice coil loudspeaker voice coil described in the magnetic strength wire cutting of each motor magnet, promote the oscillator along the water
Square to vibration.
After adopting the above technical scheme, the beneficial effects of the utility model are：Due to multitone ring electroacoustic of the present utility model
Product includes being provided with voice coil loudspeaker voice coil in housing, housing, and voice coil loudspeaker voice coil includes at least three, and multiple voice coil loudspeaker voice coils pass through two FPCB and external circuit electricity
Connection, FPCB one end is provided with the inscribed pad electrically connected respectively with each voice coil loudspeaker voice coil, and the FPCB other end is provided with and external circuit electricity
The external pad of connection；Inscribed pad is equal with the quantity of external pad and consistent with the quantity of voice coil loudspeaker voice coil.Because this product is devised
Double FPCB, and the external pad positioned at hull outside is additionally provided with FPCB, after the lead of voice coil loudspeaker voice coil is electrically connected with FPCB, pass through
Printed wiring on FPCB, makes voice coil loudspeaker voice coil be electrically connected with the external pad on FPCB, then is realized by external pad and external circuit
Electrical connection.Electrical connection adjustment so between the voice coil loudspeaker voice coil and external circuit of this product, can be external on FPCB by adjusting
Pad is easily realized.After especially being electrically connected respectively with two FPCB positioned at middle voice coil loudspeaker voice coil, middle voice coil loudspeaker voice coil can be made
For bridge, go to adjust the connection in series-parallel relation between multiple voice coil loudspeaker voice coils.Therefore multitone ring electro-acoustic product of the present utility model, need not adjusted
In the case of whole internal structure, it is possible to the impedance needed for obtaining, the demand of different terminals circuit is deacclimatized, inside is also a saving
Pad space, reduces the volume of product.
Go out acoustic aperture after being provided with due to shell, FPCB is provided with after one end of inscribed pad is located to go out at acoustic aperture, and it is inscribed
Pad is naked to be exposed on the external；It is easy to the internal adjustment connected.
Due to being electrically connected respectively with an inscribed pad on two FPCB positioned at the lead of middle voice coil loudspeaker voice coil, positioned at both sides
The lead of voice coil loudspeaker voice coil is inscribed pad with the another two on same FPCB and electrically connected；Make the voice coil loudspeaker voice coil of centre as bridge, can be convenient
The connection in series-parallel relation of three voice coil loudspeaker voice coils is adjusted, required impedance is obtained.
Due to the external pad that is connected with positioned at the inscribed pad of middle voice coil loudspeaker voice coil electrical connection with it is another on same FPCB
Any external pad short circuit in two external pads, three voice coil loudspeaker voice coils can easily realize string simultaneously by the external pad on FPCB
The adjustment of connection.
In summary, multitone ring electro-acoustic product of the present utility model compared with prior art, is solved many in the prior art
The technical problem that the connection in series-parallel adjustment of voice coil loudspeaker voice coil is realized that brought cost is high by internal pads, wasted time and energy；And this practicality
New multitone ring electro-acoustic product, in that context it may be convenient to the connection in series-parallel between voice coil loudspeaker voice coil is adjusted by the external pad on double FPCB and connects pass
System, the impedance needed for adjustment product, to adapt to the demand of different whole circuits, also a saving space, reduces the volume of product.
Brief description of the drawings
Fig. 1 is the schematic diagram that solder joint is distributed at the shell side acoustic aperture of moving-magnetic type loudspeaker in embodiment；
Fig. 2 is external schematic diagram when three voice coil loudspeaker voice coils are connected in embodiment；
Fig. 3 is the structural representation of three voice coil loudspeaker voice coil moving-magnetic type loudspeakers in embodiment；
Fig. 4 is external schematic diagram when three voice coil loudspeaker voice coils are in parallel in embodiment；
In figure：10-shell, 100-fixed part, 104-then go out acoustic aperture, 12-protecgulum, 14-FPCB, 16-inscribed weldering
The side joint of disk, 16a-two be inscribed pad, 16b-center connect inscribed pad, 18-external pad, the external pad of the side joints of 18a-two,
18b-center connects external pad, 20-voice coil loudspeaker voice coil, 22-vibrating diaphragm, 24-drive magnet, 26-motor magnet.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, set in a kind of multitone ring electro-acoustic product, including housing, housing, voice coil loudspeaker voice coil 20 is wrapped
Include at least three, multiple voice coil loudspeaker voice coils 20 are electrically connected by two FPCB14 with external circuit, FPCB14 one end provided with respectively with respectively
The inscribed pad 16 that voice coil loudspeaker voice coil 20 is electrically connected, the FPCB14 other end is provided with the external pad 18 electrically connected with external circuit；It is inscribed
Pad 16 is equal with the quantity of external pad 18, and consistent with the quantity of voice coil loudspeaker voice coil 20.
As shown in Figure 1, Figure 2 and Figure 4, multitone ring electro-acoustic product of the present utility model, by the lead and FPCB14 of voice coil loudspeaker voice coil 20
After electrical connection, by the printed wiring on FPCB14, voice coil loudspeaker voice coil 20 is set to be electrically connected with the external pad 18 on FPCB14, then by outer
Pad 18 is connect to electrically connect with external circuit realization.Electrical connection so between the voice coil loudspeaker voice coil 20 and external circuit of this product is adjusted
It is whole, can easily it be realized by adjusting the external pad 18 on FPCB14.Especially by positioned at the lead of middle voice coil loudspeaker voice coil 20
After being electrically connected respectively with two FPCB14, middle voice coil loudspeaker voice coil 20 can be gone to adjust the connection in series-parallel between multiple voice coil loudspeaker voice coils 20 as bridge
Relation.Therefore multitone ring electro-acoustic product of the present utility model, in the case where internal structure need not be adjusted, it is possible to needed for obtaining
Impedance, deacclimatize the demand of different whole circuits, and also a saving internal pads space, reduce the volume of product.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the multitone ring electro-acoustic product of the present embodiment is the dynamic magnetic provided with three voice coil loudspeaker voice coils 20
Formula loudspeaker.The housing of the moving-magnetic type loudspeaker of the present embodiment, including combination protecgulum 12 and shell 10 together, protecgulum
12 and the space that surrounds of shell 10 in contain vibrating diaphragm, and the oscillator being be arranged in parallel with vibrating diaphragm, oscillator includes three voice coil loudspeaker voice coils 20,
A fixed part 100 is respectively stretched out in the bottom of shell 10 to the two ends of shell 10.The one end of FPCB14 provided with external pad 18 is fitted in
On fixed part 100, FPCB14 is provided with one end of inscribed pad 16, through the side wall of shell 10, is fitted in positioned inside sidewalls
Shell bottom on.Shell 10 goes out acoustic aperture 104 after being provided with, FPCB14 is provided with after one end of inscribed pad 16 is located at and spoken
At hole 104, and inscribed pad 16 is naked is exposed on the external.
As shown in figure 3, moving-magnetic type loudspeaker has motor vibrations function and loudspeaker function simultaneously, it includes housing, shell
Body includes the protecgulum 12 and shell 10 combination together, and protecgulum 12 is the open box like structure in lower end, and shell 10 is upper end
Open box like structure, the opening end of protecgulum 12 is fastened on the opening end of shell 10.Vibrating diaphragm 22 is fixedly mounted on protecgulum 12,
The middle part of protecgulum 12 is provided with out acoustic aperture 120；Oscillator is suspended at by two shell fragments in the space that protecgulum 12 and shell 10 are surrounded, two bullets
Piece is fixedly connected with shell 10, and motor magnet 26 is bonded on monomer shell 10.Its vibrating diaphragm 22 is fixed with close to the side of oscillator
Three blocks of drive magnets 24, respectively the center with three voice coil loudspeaker voice coils 20 be correspondingly arranged；The direction of magnetization of each drive magnet 24 is vertical, position
Drive magnet 24 in center is opposite with the direction of magnetization of two drive magnets 24 positioned at both sides；Voice coil loudspeaker voice coil 20 forms electromagnetism after being powered
Iron, produces the interaction force driving driving sounding of vibrating diaphragm 22 with drive magnet 24, realizes loudspeaker function.
Side of the oscillator away from vibrating diaphragm 22 is provided with two pieces of motor magnets 26 simultaneously, and the direction of magnetization of each motor magnet 26 is
Vertically, and each motor magnet 26 magnetic strength wire cutting voice coil loudspeaker voice coil 20, promote oscillator vibrate in the horizontal direction, realize motor vibrations work(
Energy.
As shown in figure 1, the lead positioned at middle voice coil loudspeaker voice coil 20 is electrically connected with an inscribed pad 16 on two FPCB14 respectively
Connect, this inscribed pad 16 meets inscribed pad 16b centered on defining；Positioned at both sides voice coil loudspeaker voice coil 20 lead with same FPCB14
Another two pad 16 be inscribed electrically connect, this inscribed pad 16 is defined as two side joints and pad 16a is inscribed.Because inscribed pad 16 is exposed
Go out after at acoustic aperture 104, make the easy to operate of voice coil loudspeaker voice coil 20 and inscribed pad 16.
As shown in Figures 2 and 3, the external pad 18 electrically connected with positioned at middle voice coil loudspeaker voice coil 20, this external pad 18 is defined
Centered on meet external pad 18b；Any one the external short circuit of pad 18, this external pad electrically connected with the voice coil loudspeaker voice coil 20 positioned at both sides
18 are defined as the external pad 18a of two side joints.When the external pad 18a of two side joints of non-short circuit on the FPCB14 of left side connects external circuit
The external pad 18a of two side joints of non-short circuit connects the positive pole of external circuit on negative pole, right side FPCB14, and the external pad 18 of short circuit is not
When external again, three voice coil loudspeaker voice coils 20 are concatenated.The sense of current of three voice coil loudspeaker voice coils 20 is as shown in Figure 3.⊙ and ⊕ represent voice coil loudspeaker voice coil 20 in diagram
The interior sense of current, ⊙ represents that the sense of current is outside perpendicular to paper, and ⊕ represents that the sense of current is inside perpendicular to paper.According to each
The sense of current in voice coil loudspeaker voice coil 20, shows that three voice coil loudspeaker voice coils 20 are concatenated.
As indicated at 4, external pad 18b equally is met with the center electrically connected positioned at middle voice coil loudspeaker voice coil 20, and positioned at both sides
The external pad 18a short circuits of any one two side joint that voice coil loudspeaker voice coil 20 is electrically connected.The external pad of two side joints of non-short circuit on the FPCB14 of left side
The external pad 18a of two side joints that 18a connects non-short circuit on the positive pole of external circuit, right side FPCB14 connects the negative pole of external circuit, left
One on the FPCB14 of side in the external pad 18 of short circuit two external pad 18 (external pad 18b can be met centered on, or
The external pad 18a of two side joints) connect an external weldering in the external pad 18 of short circuit two on the negative pole of external circuit, right side FPCB14
Disk 18 (external pad 18b can be met centered on, or the external pad 18a of two side joints) connects the positive pole of external circuit, makes three
Individual voice coil loudspeaker voice coil 20 simultaneously connects.
From the foregoing, series-parallel adjustment of three voice coil loudspeaker voice coils 20 of the present embodiment, only have adjusted positioned at the outside of shell 10
External pad 18, internal connection is not adjusted.And voice coil loudspeaker voice coil 20 internally with the electricity of inscribed pad 16 on FPCB14
Connection, without being adjusted to inscribed pad 16 during adjustment, has saved the time of adjustment, has also saved the inscribed institute of pad 16
The space of occupancy, allows moving-magnetic type loudspeaker to have good performance.
Electro-acoustic product of the present utility model does not limit the moving-magnetic type loudspeaker with three voice coil loudspeaker voice coils 20 cited by the present embodiment,
Include the electro-acoustic product of the voice coil loudspeaker voice coil 20 of more than three.
Preferred embodiment of the present utility model described above, it is all in this practicality not to limit the utility model
Any modification for being made within new spirit and principle, etc. the improvement of same multitone ring electro-acoustic product structure etc., all should wrap
It is contained within protection domain of the present utility model.
Claims (10)
1. voice coil loudspeaker voice coil is provided with a kind of multitone ring electro-acoustic product, including housing, the housing, it is characterised in that the voice coil loudspeaker voice coil includes
At least three, multiple voice coil loudspeaker voice coils are electrically connected by two FPCB with external circuit, one end of the FPCB provided with respectively with respectively
The inscribed pad of the voice coil loudspeaker voice coil electrical connection, the other end of the FPCB is provided with the external pad electrically connected with the external circuit；
The inscribed pad is equal with the quantity of the external pad, and consistent with the quantity of the voice coil loudspeaker voice coil.
2. multitone ring electro-acoustic product according to claim 1, it is characterised in that the multitone ring electro-acoustic product is provided with three
The moving-magnetic type loudspeaker of the individual voice coil loudspeaker voice coil.
3. multitone ring electro-acoustic product according to claim 2, it is characterised in that the housing of the moving-magnetic type loudspeaker
Including combination containing in protecgulum and shell together, the space that the protecgulum and the shell are surrounded vibrating diaphragm and with
The oscillator that the vibrating diaphragm be arranged in parallel, the oscillator includes three voice coil loudspeaker voice coils；The bottom of the shell is to the two of the shell
One fixed part of each stretching in end, one end that the FPCB is provided with the external pad is fitted on the fixed part, the FPCB
One end of the inscribed pad is provided with, through the side wall of the shell, the shell positioned at the inside sidewalls is fitted in
Bottom on.
4. multitone ring electro-acoustic product according to claim 3, it is characterised in that the shell goes out acoustic aperture, institute after being provided with
State FPCB be provided with one end of the inscribed pad be located at it is described after go out at acoustic aperture, and the inscribed pad is naked is exposed on the external.
5. multitone ring electro-acoustic product according to claim 4, it is characterised in that positioned at the lead point of the middle voice coil loudspeaker voice coil
Do not electrically connected with an inscribed pad described in two on FPCB, positioned at both sides the voice coil loudspeaker voice coil lead with it is same described in
Pad electrical connection is inscribed described in another two on FPCB.
6. multitone ring electro-acoustic product according to claim 5, it is characterised in that electrically connected with positioned at the middle voice coil loudspeaker voice coil
The external pad that is connected of the inscribed pad and appointing in external pad described in the another two on the same FPCB
External pad short circuit described in one.
7. multitone ring electro-acoustic product according to claim 6, it is characterised in that described in two on FPCB non-short circuit it is described outer
Connect pad to electrically connect with the positive pole and negative pole of the external circuit respectively, three voice coil loudspeaker voice coil concatenations.
8. multitone ring electro-acoustic product according to claim 6, it is characterised in that described in two on FPCB non-short circuit it is described outer
Connect pad to electrically connect with the positive pole and negative pole of external circuit respectively, the negative pole of the external pad of short circuit respectively with external circuit
With positive pole electrical connection, three voice coil loudspeaker voice coils simultaneously connect.
9. multitone ring electro-acoustic product according to claim 3, it is characterised in that the vibrating diaphragm is close to the side of the oscillator
Three blocks of drive magnets are fixed with, the center with three voice coil loudspeaker voice coils is correspondingly arranged respectively；The direction of magnetization of each drive magnet
To be vertical, the drive magnet positioned at center is opposite with the direction of magnetization of drive magnet described in two positioned at both sides；The sound
Circle forms electromagnet after being powered, and producing interaction force with the drive magnet drives the vibrating diaphragm driving sounding.
10. multitone ring electro-acoustic product according to claim 9, it is characterised in that the oscillator away from the vibrating diaphragm one
Side is provided with two pieces of motor magnets, and the direction of magnetization of each motor magnet is vertical, and the magnetic induction line of each motor magnet
The voice coil loudspeaker voice coil is cut, promotes the oscillator to be vibrated along the horizontal direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268936.1U CN206602654U (en) | 2017-03-18 | 2017-03-18 | A kind of multitone ring electro-acoustic product |
| PCT/CN2017/078759 WO2018170946A1 (en) | 2017-03-18 | 2017-03-30 | Moving magnet loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268936.1U CN206602654U (en) | 2017-03-18 | 2017-03-18 | A kind of multitone ring electro-acoustic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206602654U true CN206602654U (en) | 2017-10-31 |
Family
ID=60145405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720268936.1U Active CN206602654U (en) | 2017-03-18 | 2017-03-18 | A kind of multitone ring electro-acoustic product |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN206602654U (en) |
| WO (1) | WO2018170946A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068247A (en) * | 2018-08-07 | 2018-12-21 | 张永春 | Multiple engine array system and loudspeaker |
| CN113347538A (en) * | 2021-08-05 | 2021-09-03 | 深圳市汇鑫垒刀模科技有限公司 | Heat dissipation damping loudspeaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201248131Y (en) * | 2005-03-29 | 2009-05-27 | 张录 | Movable magnetic loudspeaker |
| GB2461867B (en) * | 2008-07-11 | 2010-09-22 | Cooper Medc Ltd | Speaker assembly |
| JP4875733B2 (en) * | 2009-07-27 | 2012-02-15 | 進 木村 | Movable magnet type speaker and manufacturing method thereof |
| CN204810546U (en) * | 2015-07-01 | 2015-11-25 | 深圳精拓创新科技有限公司 | Single vibrating diaphragm structure move magnetism and piezoelectricity combined type broadband speaker |
| CN105813001A (en) * | 2016-05-30 | 2016-07-27 | 上海超彩通信科技有限公司 | Moving magnet type vibration speaker |
-
2017
- 2017-03-18 CN CN201720268936.1U patent/CN206602654U/en active Active
- 2017-03-30 WO PCT/CN2017/078759 patent/WO2018170946A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068247A (en) * | 2018-08-07 | 2018-12-21 | 张永春 | Multiple engine array system and loudspeaker |
| CN113347538A (en) * | 2021-08-05 | 2021-09-03 | 深圳市汇鑫垒刀模科技有限公司 | Heat dissipation damping loudspeaker |
| CN113347538B (en) * | 2021-08-05 | 2021-10-01 | 深圳市汇鑫垒刀模科技有限公司 | Heat dissipation damping loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018170946A1 (en) | 2018-09-27 |
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