CN209314049U - A kind of connection structure of the top dome of loudspeaker and sound film - Google Patents
A kind of connection structure of the top dome of loudspeaker and sound film Download PDFInfo
- Publication number
- CN209314049U CN209314049U CN201920051080.1U CN201920051080U CN209314049U CN 209314049 U CN209314049 U CN 209314049U CN 201920051080 U CN201920051080 U CN 201920051080U CN 209314049 U CN209314049 U CN 209314049U
- Authority
- CN
- China
- Prior art keywords
- carbon fiber
- fiber layer
- sound film
- hole
- top dome
- 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.)
- Active
Links
Abstract
The utility model provides a kind of top dome of loudspeaker and the connection structure of sound film, including sound film and top dome；The sound film is equipped with the ring that a circle raises upward；The top dome includes the first carbon fiber layer, foaming body layer and the second carbon fiber layer being cascading from top to down, and second carbon fiber layer is equipped with through-hole；Second carbon fiber layer is located in the ring area encompassed of a circle, and second carbon fiber layer bottom surface is connect with sound film upper surface by glue, and the through-hole is equipped with the glue layer of connection through-hole wall and sound film upper surface；The ridge orientation of first carbon fiber layer is obliquely installed, and the ridge orientation of the ridge orientation of second carbon fiber layer and first carbon fiber layer is arranged in a mutually vertical manner.The utility model avoids the problem that the anti-dress in front in top dome installation process, the rigidity of top dome is improved, to ensure that the acoustical behavior of loudspeaker.
Description
Technical field
The utility model relates to the connection knots of speaker technology field more particularly to a kind of top dome of loudspeaker and sound film
Structure.
Background technique
Mobile terminal uses at present loudspeaker, receiver are mostly coil-moving speaker；
Coil-moving speaker includes: magnetic circuit system, vibrational system and the fixed magnetic circuit system of receiving and vibrational system
Frame.The vibrational system includes vibrating diaphragm, top dome and voice coil；In the prior art, in order to increase the height of Microspeaker vibrating diaphragm
Frequency characteristic needs in the setting of the center of vibrating diaphragm while having the composite layer top dome of rigidity and elasticity.In order to not influence miniature
The sensitivity of loudspeaker, the vibrating diaphragm face for being bonded top dome reduce vibrating diaphragm weight using hollow design, and composite layer top dome also selects lightweight
Material such as foaming body and have rigid hard aluminium foil etc..
In Microspeaker, in addition to the performance of raising loudspeaker vibration component and electromagnetic assembly, optimize loadspeaker structure
Reliability also can be improved the sound quality of loudspeaker.In order to not influence the sensitivity of Microspeaker, vibrating diaphragm uses hollow out
Design, is allowed to corresponding with top dome bond area and reduces, and the cementability between vibrating diaphragm and top dome is also corresponding to be reduced, reliability examination
Rear vibrating diaphragm is tested with top dome there may be Nian Jie insecure, easily separated phenomenon, influences acoustical behavior and the service life of product.
Composite layer top dome requires rigidity, elasticity, lightweight, and usual composite layer top dome is designed using three-decker, up and down
Layer uses the foaming materials body of lightweight using the material hard aluminium foil with rigidity, centre.Because being punched direction reason, Yi Jishang
Understructure designs hard aluminum foil thickness may be different, so top dome is divided into front and back sides, but because of layer material above and below top dome
It is hard aluminium foil, is visually difficult to differentiate top dome front and back sides, during production and assembly, easily front is anti-is filled, to influence acoustics
Performance.
Utility model content
The utility model is intended to provide the connection structure of a kind of top dome of loudspeaker and sound film, can be avoided top dome installation
In the process front anti-the problem of filling, improve the acoustical behavior of loudspeaker.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:
A kind of connection structure of the top dome of loudspeaker and sound film, including sound film and top dome；
The sound film is equipped with the ring that a circle raises upward；The top dome includes to be cascading from top to down
One carbon fiber layer, foaming body layer and the second carbon fiber layer, second carbon fiber layer are equipped with through-hole；Second carbon fiber layer
In the ring area encompassed of a circle, second carbon fiber layer bottom surface and sound film upper surface are connected by glue
It connects, the through-hole is equipped with the glue layer of connection through-hole wall and sound film upper surface；The ridge orientation of first carbon fiber layer
It is obliquely installed, the ridge orientation of the ridge orientation of second carbon fiber layer and first carbon fiber layer is arranged in a mutually vertical manner.
Further, the middle position that sound film upper surface is located at the ring institute enclosing region of a circle is equipped with rectangular the
One through-hole.
Further, the length of the first through hole is default first value, and the width of the first through hole is default second
Value.
Further, second carbon fiber layer is equipped with multiple through-holes, and the through-hole is circular through hole or rectangular
Through-hole.
Further, the diameter of the circular through hole is 0.1-0.5mm.
Further, the thickness of the thickness of the first carbon fiber layer and the second carbon fiber layer is the 1/5- of foaming bulk layer thickness
1/3。
Further, the ridge orientation of first carbon fiber layer is mutually arranged in parallel, and first carbon fiber layer is
Square structure；The angle of the length direction or width direction of the ridge orientation and first carbon fiber layer is 45 °.
Further, the link position of the through-hole and the sound film is located at the ring area encompassed of a circle
Interior, the link position is located at outside the first through hole.
Further, first carbon fiber layer upper surface is equipped with the radiating groove parallel with ridge orientation.
The utility model has the following beneficial effects:
The utility model provides a kind of top dome of loudspeaker and the connection structure of sound film, and top dome includes from top to down successively
The first carbon fiber layer, foaming body layer and the second carbon fiber layer being stacked, the second carbon fiber layer are equipped with through-hole, the second carbon fiber
Dimension layer bottom surface is connect with sound film upper surface, and through-hole is equipped with the glue layer of connection through-hole wall and sound film upper surface；Described first
The ridge orientation of carbon fiber layer is obliquely installed, and the ridge orientation of the ridge orientation of the second carbon fiber layer and the first carbon fiber layer is mutual
It is vertically arranged.Top dome provided by the utility model is using the first carbon fiber layer, foaming body layer and the second carbon fiber being stacked
Layer, hole is provided on the second carbon fiber layer can make the front and back sides of top dome be easy to distinguish, and production and assembly process is avoided to occur
The phenomenon that positive anti-dress, and the plastic hole that the through-hole is also used as top dome Nian Jie with sound film, it is bonding with vibrating diaphragm that top dome can be enhanced
Effect, and increase frictional force and stronger lateral stress is provided, the reliability of itself and vibrating diaphragm assembly can be effectively improved, together
When the utility model traditional aluminium foil layer is changed to carbon fiber layer, can be improved the heat dissipation performance of top dome, guarantee that sound film is normally steady
Fixed work；Further, the ridge orientation of first carbon fiber layer of the utility model is obliquely installed, the line of the second carbon fiber layer
Road direction and the ridge orientation of the first carbon fiber layer are arranged in a mutually vertical manner, so that top dome is at long and short axis direction (horizontal and vertical)
Rigidity it is all sufficiently strong, and the lines of upper and lower level is intersecting vertical so that the rigidity of diagonal aspect will not be very weak, improve because
It is easy the problem of being easily deformed carbon fiber layer for ridge orientation setting, influences performance and the service life of product.
Detailed description of the invention
Fig. 1 is the explosive view of a kind of top dome of loudspeaker of the utility model embodiment and the connection structure of sound film；
Fig. 2 is the schematic diagram of the ridge orientation of first carbon fiber layer of the utility model embodiment；
Fig. 3 is the schematic diagram of the ridge orientation of second carbon fiber layer of the utility model embodiment；
Label declaration:
1, sound film；2, top dome；3, ring；4, the first carbon fiber layer；5, foaming body layer；6, the second carbon fiber layer；7, through-hole；
8, first through hole.
Specific embodiment
For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
The design of the utility model most critical is: top dome includes the first carbon fiber being cascading from top to down
Layer, foaming body layer and the second carbon fiber layer, the second carbon fiber layer are equipped with through-hole, the second carbon fiber layer bottom surface and sound film upper surface
Connection, through-hole are equipped with the glue layer of connection through-hole wall and sound film upper surface；The ridge orientation of first carbon fiber layer inclines
The ridge orientation of tiltedly setting, the ridge orientation of the second carbon fiber layer and the first carbon fiber layer is arranged in a mutually vertical manner.
Fig. 1-Fig. 3 is please referred to, the utility model provides a kind of top dome of loudspeaker and the connection structure of sound film, including sound
Film and top dome；
The sound film is equipped with the ring that a circle raises upward；The top dome includes to be cascading from top to down
One carbon fiber layer, foaming body layer and the second carbon fiber layer, second carbon fiber layer are equipped with through-hole；Second carbon fiber layer
In the ring area encompassed of a circle, second carbon fiber layer bottom surface and sound film upper surface are connected by glue
It connects, the through-hole is equipped with the glue layer of connection through-hole wall and sound film upper surface；The ridge orientation of first carbon fiber layer
It is obliquely installed, the ridge orientation of the ridge orientation of second carbon fiber layer and first carbon fiber layer is arranged in a mutually vertical manner.
As can be seen from the above description, the utility model provides a kind of top dome of loudspeaker and the connection structure of sound film, top dome
Including the first carbon fiber layer, foaming body layer and the second carbon fiber layer being cascading from top to down, on the second carbon fiber layer
Equipped with through-hole, the second carbon fiber layer bottom surface is connect with sound film upper surface, and through-hole is equipped with connection through-hole wall and sound film upper surface
Glue layer；The ridge orientation of first carbon fiber layer is obliquely installed, the ridge orientation of the second carbon fiber layer and the first carbon fiber
The ridge orientation of dimension layer is arranged in a mutually vertical manner.Top dome provided by the utility model is using the first carbon fiber layer, the hair being stacked
Blister layer and the second carbon fiber layer, hole is provided on the second carbon fiber layer can make the front and back sides of top dome be easy to distinguish, and keep away
Exempt from production and assembly process and front anti-the phenomenon that filling, and the plastic hole that the through-hole is also used as top dome Nian Jie with sound film occur, can increase
The adhesive effect of strong top dome and vibrating diaphragm, and increase frictional force and stronger lateral stress is provided, can effectively improve its with
The reliability of vibrating diaphragm assembly, while traditional aluminium foil layer is changed to carbon fiber layer by the utility model, can be improved the heat dissipation of top dome
Performance guarantees the work of sound film normal table；Further, the ridge orientation inclination of first carbon fiber layer of the utility model is set
It sets, the ridge orientation of the second carbon fiber layer and the ridge orientation of the first carbon fiber layer are arranged in a mutually vertical manner, so that top dome is long and short
The rigidity of axis direction (horizontal and vertical) is all sufficiently strong, and the lines of upper and lower level is intersecting vertical, so that diagonal aspect is rigid
Property will not be very weak, improve because ridge orientation setting being easy the problem of being easily deformed carbon fiber layer, influence the performance of product
With the service life.
Further, the middle position that sound film upper surface is located at the ring institute enclosing region of a circle is equipped with rectangular the
One through-hole.
As can be seen from the above description, by above structure, can reduce the quality of sound film, and can't loudspeaker normal fortune
Row.
Further, the length of the first through hole is default first value, and the width of the first through hole is default second
Value.
Further, the ring enclosing region is square region, presets 1/3 that the first value is square region length, in advance
If second value is the 1/3 of square region width, the first through hole of the size not only can guarantee the top dome reliability Nian Jie with sound film, but also
Sound film weight can be made minimum, to guarantee the sensitivity of loudspeaker.
Preferably, it is rectangular-ambulatory-plane that the ring, which is projected in the shape of horizontal plane,.
As can be seen from the above description, by the first through hole of above-mentioned size the quality of sound film can be reduced to the maximum extent, together
When guarantee the reliability and stability that connect with top dome of sound film.
Further, second carbon fiber layer is equipped with multiple through-holes, and the through-hole is circular through hole or rectangular
Through-hole.
Further, the diameter of the circular through hole is 0.1-0.5mm.
As can be seen from the above description, guaranteeing the reliability that the second carbon fiber layer is connect with sound film by the through-hole of above-mentioned size
While, it is ensured that the structural behaviour of top dome can not be affected.
Further, the thickness of the thickness of the first carbon fiber layer and the second carbon fiber layer is the 1/5- of foaming bulk layer thickness
1/3。
Preferably, the thickness of the thickness of the first carbon fiber layer and the second carbon fiber layer is equal.
As can be seen from the above description, by above-mentioned top dome, so that top dome reaches optimal effect to the heat dissipation performance of sound film,
It can ensure the normal work of sound film；
Further, the ridge orientation of first carbon fiber layer is mutually arranged in parallel, and first carbon fiber layer is
Square structure；The angle of the length direction or width direction of the ridge orientation and first carbon fiber layer is 45 °.
As can be seen from the above description, enabling to the first carbon fiber layer uniform force in loudspeaker, most by above structure
Guarantee to limits its in horizontal and vertical rigidity, while pass through the first carbon fiber layer and the second carbon fiber layer structure, it is ensured that
The rigidity of top dome in the diagonal direction is also able to satisfy the demand of top dome normal use in loudspeaker, it is ensured that when its normal use,
It will not deform, to guarantee the performance of loudspeaker.
Further, the link position of the through-hole and the sound film is located at the ring area encompassed of a circle
Interior, the link position is located at outside the first through hole.
As can be seen from the above description, can guarantee the reliability and stability that top dome is connect with sound film by above structure.
Further, first carbon fiber layer upper surface is equipped with the radiating groove parallel with ridge orientation.
As can be seen from the above description, while not destroying the first carbon fiber layer, improving dissipating for top dome by above structure
Hot property.
Please refer to Fig. 1-Fig. 3, the embodiments of the present invention are as follows:
The utility model provides a kind of top dome of loudspeaker and the connection structure of sound film, including sound film 1 and top dome 2；
The sound film 1 is equipped with the ring 3 that a circle raises upward；The top dome 2 includes being cascading from top to down
The first carbon fiber layer 4, foaming body layer 5 and the second carbon fiber layer 6, second carbon fiber layer 6 be equipped with through-hole 7；Described
Two carbon fiber layers 6 are located in 3 area encompassed of ring of a circle, table on 6 bottom surface of the second carbon fiber layer and the sound film 1
Face is connected by glue, and the through-hole 7 is equipped with the glue layer of connection 7 inner wall of through-hole and 1 upper surface of sound film；First carbon fiber
The ridge orientation of dimension layer 4 is obliquely installed, the lines of the ridge orientation of second carbon fiber layer 6 and first carbon fiber layer 4
Direction is arranged in a mutually vertical manner.
The middle position that 1 upper surface of sound film is located at 3 enclosing regions of ring of a circle is equipped with rectangular first through hole
8；The length of the first through hole 8 is default first value, and the width of the first through hole 8 is default second value；Wherein, the folding
Ring enclosing region is square region, presets 1/3 that the first value is square region length, and presetting second value is square region width
1/3, the first through hole of the size not only can guarantee the top dome reliability Nian Jie with sound film, but also sound film weight can be made minimum, to protect
Demonstrate,prove the sensitivity of loudspeaker；
Second carbon fiber layer 6 be equipped with multiple equally distributed through-holes 7, the through-hole 7 be circular through hole 7 or
Square through hole 7；The diameter of the circular through hole 7 be 0.1-0.5mm, the length and width of the square through hole 7 be respectively 0.3mm and
0.2mm；
The thickness of the thickness of first carbon fiber layer 4 and the second carbon fiber layer 6 is the 1/5-1/3 of 5 thickness of foaming body layer；Institute
The ridge orientation for stating the first carbon fiber layer 4 is mutually arranged in parallel, and the ridge orientation of second carbon fiber layer 6 is mutually parallel
Setting, first carbon fiber layer 4 and the second carbon fiber layer 6 are square structure；The ridge orientation and first carbon fiber
The angle of the length direction or width direction of tieing up layer 4 is 45 °；The link position of the through-hole 7 and the sound film 1 is located at described one
In 3 area encompassed of ring of circle, the link position is located at outside the first through hole 8；Table on first carbon fiber layer 4
Face is equipped with the radiating groove parallel with ridge orientation.
In conclusion the utility model provides a kind of top dome of loudspeaker and the connection structure of sound film, top dome includes extremely
The first carbon fiber layer, foaming body layer and the second carbon fiber layer being cascading under above, the second carbon fiber layer are equipped with logical
Hole, the second carbon fiber layer bottom surface are connect with sound film upper surface, and through-hole is equipped with the glue of connection through-hole wall and sound film upper surface
Layer；The ridge orientation of first carbon fiber layer is obliquely installed, the ridge orientation of the second carbon fiber layer and the first carbon fiber layer
Ridge orientation is arranged in a mutually vertical manner.Top dome provided by the utility model is using the first carbon fiber layer, the foaming body layer being stacked
With the second carbon fiber layer, hole is provided on the second carbon fiber layer can make the front and back sides of top dome be easy to distinguish, and avoid producing
There is front anti-the phenomenon that filling, and the plastic hole that the through-hole is also used as top dome Nian Jie with sound film in assembling process, can enhance top dome
It with the adhesive effect of vibrating diaphragm, and increases frictional force and stronger lateral stress is provided, can effectively improve it and vibrating diaphragm fills
The reliability matched, while traditional aluminium foil layer is changed to carbon fiber layer by the utility model, can be improved the heat dissipation performance of top dome, is protected
Demonstrate,prove the work of sound film normal table；Further, the ridge orientation of first carbon fiber layer of the utility model is obliquely installed, and second
The ridge orientation of carbon fiber layer and the ridge orientation of the first carbon fiber layer are arranged in a mutually vertical manner, so that top dome is in long and short axis direction
The rigidity of (horizontal and vertical) is all sufficiently strong, and the lines of upper and lower level is intersecting vertical, so that the rigidity of diagonal aspect is not yet
Can be very weak, improve because ridge orientation setting is easy the problem of being easily deformed carbon fiber layer, influences performance and the service life of product.
Upper described only the embodiments of the present invention, therefore it does not limit the scope of the patent of the utility model, all benefits
The equivalents made by the utility model specification and accompanying drawing content are applied directly or indirectly in relevant technical field,
It is also included in the patent protection scope of the utility model.
Claims (9)
1. a kind of connection structure of the top dome of loudspeaker and sound film, which is characterized in that including sound film and top dome；
The sound film is equipped with the ring that a circle raises upward；The top dome includes the first carbon being cascading from top to down
Fibrous layer, foaming body layer and the second carbon fiber layer, second carbon fiber layer are equipped with through-hole；Second carbon fiber layer is located at
In the ring area encompassed of one circle, second carbon fiber layer bottom surface is connect with sound film upper surface by glue, institute
State the glue layer that through-hole is equipped with connection through-hole wall and sound film upper surface；The ridge orientation inclination of first carbon fiber layer is set
It sets, the ridge orientation of the ridge orientation of second carbon fiber layer and first carbon fiber layer is arranged in a mutually vertical manner.
2. the connection structure of a kind of top dome of loudspeaker according to claim 1 and sound film, which is characterized in that the sound film
The middle position that upper surface is located at the ring institute enclosing region of a circle is equipped with rectangular first through hole.
3. the connection structure of a kind of top dome of loudspeaker according to claim 2 and sound film, which is characterized in that described first
The length of through-hole is default first value, and the width of the first through hole is default second value.
4. the connection structure of a kind of top dome of loudspeaker according to claim 2 and sound film, which is characterized in that described second
Carbon fiber layer is equipped with multiple through-holes, and the through-hole is circular through hole or square through hole.
5. the connection structure of a kind of top dome of loudspeaker according to claim 4 and sound film, which is characterized in that the circle
The diameter of through-hole is 0.1-0.5mm.
6. the connection structure of a kind of top dome of loudspeaker according to claim 1 and sound film, the thickness of the first carbon fiber layer
Thickness with the second carbon fiber layer is the 1/5-1/3 of foaming bulk layer thickness.
7. the connection structure of a kind of top dome of loudspeaker according to claim 1 and sound film, which is characterized in that described first
The ridge orientation of carbon fiber layer is mutually arranged in parallel, and first carbon fiber layer is square structure；The ridge orientation and institute
The angle of the length direction or width direction of stating the first carbon fiber layer is 45 °.
8. the connection structure of a kind of top dome of loudspeaker according to claim 2 and sound film, which is characterized in that the through-hole
It is located in the ring area encompassed of a circle with the link position of the sound film, the link position is located at described first
Outside through-hole.
9. the connection structure of a kind of top dome of loudspeaker according to claim 1 and sound film, which is characterized in that described first
Carbon fiber layer upper surface is equipped with the radiating groove parallel with ridge orientation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920051080.1U CN209314049U (en) | 2019-01-10 | 2019-01-10 | A kind of connection structure of the top dome of loudspeaker and sound film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920051080.1U CN209314049U (en) | 2019-01-10 | 2019-01-10 | A kind of connection structure of the top dome of loudspeaker and sound film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209314049U true CN209314049U (en) | 2019-08-27 |
Family
ID=67680820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920051080.1U Active CN209314049U (en) | 2019-01-10 | 2019-01-10 | A kind of connection structure of the top dome of loudspeaker and sound film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209314049U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131973A (en) * | 2020-01-14 | 2020-05-08 | 东莞达电电子有限公司 | Vibrating diaphragm structure for earphone |
| CN111447541A (en) * | 2019-12-26 | 2020-07-24 | 瑞声科技(新加坡)有限公司 | Manufacturing method of carbon fiber ball top |
| WO2022067922A1 (en) * | 2020-09-30 | 2022-04-07 | 瑞声声学科技(深圳)有限公司 | Sound production unit |
-
2019
- 2019-01-10 CN CN201920051080.1U patent/CN209314049U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111447541A (en) * | 2019-12-26 | 2020-07-24 | 瑞声科技(新加坡)有限公司 | Manufacturing method of carbon fiber ball top |
| CN111131973A (en) * | 2020-01-14 | 2020-05-08 | 东莞达电电子有限公司 | Vibrating diaphragm structure for earphone |
| WO2022067922A1 (en) * | 2020-09-30 | 2022-04-07 | 瑞声声学科技(深圳)有限公司 | Sound production unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209314049U (en) | A kind of connection structure of the top dome of loudspeaker and sound film | |
| US9467783B2 (en) | Low profile loudspeaker transducer | |
| CN104159179B (en) | Loudspeaker mould group | |
| CN207835800U (en) | sound-producing device | |
| US8750554B2 (en) | Speaker diaphragm and speaker device | |
| CN103856874A (en) | Loudspeaker vibration system | |
| WO2017016151A1 (en) | Loudspeaker | |
| US11006222B2 (en) | Speaker | |
| TWI767892B (en) | Diaphragm for speaker | |
| CN206602637U (en) | Vibrating diaphragm and the electro-acoustic element using the vibrating diaphragm | |
| CN101394687A (en) | Microphone with silicon capacitor | |
| CN208940229U (en) | Sounding device | |
| US9351078B2 (en) | Vibrating panel device for electromagnetic vibrator and its manufacture method | |
| CN101489169A (en) | Speaker unit | |
| US4764968A (en) | Disk diaphragm for a loudspeaker | |
| US10178480B2 (en) | Speaker and magnetic circuit system thereof | |
| US20050089187A1 (en) | Nanoporous diaphragm for electromagentic transducer | |
| US10667058B2 (en) | Diaphragm and speaker | |
| WO2020006938A1 (en) | Electrical connection structure in sound producing device and vibration system and loudspeaker | |
| CN206024103U (en) | A kind of vibrational system in voice coil structure and loudspeaker | |
| CN209693041U (en) | Microspeaker | |
| CN108235197A (en) | A kind of loud speaker module | |
| CN103338426A (en) | Micro loudspeaker and manufacturing method of vibration system of micro loudspeaker | |
| EP2299732A2 (en) | Speaker | |
| CN208300019U (en) | A kind of bulging paper and the loudspeaker with the drum paper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |