CN208874730U - A kind of loudspeaker and speaker of active refrigeration - Google Patents
A kind of loudspeaker and speaker of active refrigeration Download PDFInfo
- Publication number
- CN208874730U CN208874730U CN201820692586.6U CN201820692586U CN208874730U CN 208874730 U CN208874730 U CN 208874730U CN 201820692586 U CN201820692586 U CN 201820692586U CN 208874730 U CN208874730 U CN 208874730U
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- loudspeaker
- opening
- active refrigeration
- iron
- fixed
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 63
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052742 iron Inorganic materials 0.000 claims abstract description 33
- 238000004804 winding Methods 0.000 claims abstract description 4
- 239000004065 semiconductor Substances 0.000 claims description 42
- 238000001816 cooling Methods 0.000 claims description 22
- 239000007787 solid Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 229910052701 rubidium Inorganic materials 0.000 description 4
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 4
- 230000003685 thermal hair damage Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model is providing the loudspeaker and speaker of a kind of active refrigeration, and wherein loudspeaker includes frame and vibrational system and magnetic circuit system, and vibrational system includes vibrating diaphragm and voice coil, and voice coil is fixed on vibrating diaphragm by the top of its winding section；Magnetic circuit system includes T iron, magnet and washer, and washer and magnet are located at the top of T iron, magnetic gap are constituted between washer and magnet and T iron, voice coil moves up and down in magnetic gap；Loudspeaker further includes the active refrigeration module for being fixed on the T iron back side, and active refrigeration module cools down to magnetic circuit system by way of heat transfer.The utility model additionally provides a kind of speaker comprising the loudspeaker of above-mentioned active refrigeration, and the first opening and the second opening are offered respectively on longer both sides, radiator is fixed in the second opening and stretches out from the second opening.The utility model additionally provides another speaker, also includes the loudspeaker of above-mentioned active refrigeration, and the second opening is inwardly formed air hose, and air hose is in alignment with radiator.
Description
Technical field
The utility model relates to the technical fields of loudspeaker manufacture, more particularly, to the loudspeaker and sound of a kind of active refrigeration
Case.
Background technique
Coil-moving speaker is the most widely used loudspeaker in the whole world.As a kind of electroacoustic transducer, moving-coil type loudspeaking
The voice output efficiency of device will be typically less than 2%, this is because inputing power has 90% Joule heat for being all converted into loudspeaker voice coil.
These heats can allow the temperature of voice coil to steeply rise, at the same heated loudspeaker entire magnetic circuit system (including washer, magnet and
T iron).
Therefore, the heat dissipation design of loudspeaker seems extremely important, otherwise easilys lead to neodium magnet and demagnetizes at high temperature, sound
Turn coil is burnt at high temperature, and this severely limits the power of resistance to receiving of loudspeaker.Sometimes for the resistance to receiving for improving loudspeaker
Power is forced using the higher voice coil of temperature resistant grade and neodium magnet, but this does not only result in steeply rising for loudspeaker cost, and
The hoisting power of this mode is fairly limited.
Currently, the method that improvement loudspeaker commonly used in the trade radiates mainly has (1) to use the skeleton of metal and drum paper；(2)
Increase forced convection, aperture allows more air to flow through voice coil surface and takes away heat on components；(3) by magnetic circuit and sound
Blacking is enclosed, radiation efficiency is increased.
But in three kinds of above-mentioned methods, (1) using the skeleton and drum paper of metal, since interior damping is small, sound quality is partially hard,
Larger impact is exported for sound；(2) speaker is ensconced in the limited efficacy to radiate by forced convection to voice coil, especially heat source
In, convection effects are very poor；(3) magnetic circuit and voice coil blacking, though being conducive to heat radiation between the two, magnetic circuit can rise quickly
To certain temperature, it is finally reached thermal balance, cannot continue to radiate.
Therefore, it is necessary to be optimized to the cooling system of existing loudspeaker, to reduce the whole temperature of loudspeaker
Degree, it is ensured that work normally.
Summary of the invention
In order to solve the above problems existing in the present technology, the utility model provides one kind and is provided with active refrigeration module
Loudspeaker, fitted in using thermoelectric semiconductor cooling piece and carry out active refrigeration in T iron, the temperature of entire magnetic circuit system is reduced
Afterwards, and then by the temperature of corresponding voice coil heat source it also reduces, finally reduces the temperature of entire loudspeaker, improve limit input
Power.
To achieve the above object, the utility model provides following technical solution:
A kind of loudspeaker of active refrigeration, it is described including frame and the vibrational system being contained in frame and magnetic circuit system
Vibrational system includes vibrating diaphragm and voice coil, and the voice coil is fixed on the vibrating diaphragm by the top of its winding section；The magnetic circuit system
System includes T iron, magnet and washer, and the washer and magnet are located at the top of T iron, constitute between the washer and magnet and T iron
Magnetic gap, the voice coil move up and down in magnetic gap；It is characterized in that, further including the active refrigeration mould for being fixed on the T iron back side
Block, the active refrigeration module cool down to magnetic circuit system by way of heat transfer.
Active refrigeration module is fixed on the T iron surface of magnetic circuit system, cools down by force to magnetic circuit system, is also equivalent to cold source
There are mutual heats to exchange between voice coil heat source.By increasing the refrigerating efficiency of cold source active refrigeration module, then can drop
The temperature of bass circle and entire speaker system, thus avoid each component since temperature is excessively high and risk there are cause thermal damage, into
And the limit for increasing loudspeaker bears power.
As further describing for the technical solution of the utility model, the active refrigeration module includes semiconductor system
Cold, fixing piece and radiator；The semiconductor chilling plate is electrically connected with DC power supply, and cold end fits in the back side of T iron, heat
End then fits on radiator；Radiator and semiconductor chilling plate are fixed in T iron by the fixing piece.
Semiconductor chilling plate is made of two panels substrate, there is the semiconductor material element of N-type and p-type among it, and cooling piece needs
It is connected on DC power supply and works.When DC current flows to the connector of p-type element from N-type element, absorb heat at
For cold end；When electric current flows to the connector of N-type element from p-type element, release heat becomes hot end.The cold end of semiconductor chilling plate
Fit in T iron surface, hot end then fits on radiator, due to radiator can the hot end to semiconductor chilling plate effectively carry out it is scattered
More heats will be transmitted to the cold end of cooling piece by heat, such T iron by contact, when the temperature of entire magnetic circuit system reduces
Afterwards, correspondingly, the temperature of voice coil heat source can also be effectively reduced, and realize the purpose for improving limit input power.
As further describing for the technical solution of the utility model, the radiator is in one far from semiconductor chilling plate
Side is provided with multiple cooling fins.
It is provided with multiple cooling fins on radiator, guarantees the heat dissipation effect to semiconductor chilling plate hot end, guarantees cooling piece
Refrigerating efficiency.
As further describing for the technical solution of the utility model, the fixing piece is screw, it is ensured that semiconductor refrigerating
Piece and T iron surface, semiconductor chilling plate and radiator are completely embedded, and carry out effectively thermo-contact conduction.
The utility model additionally provides a kind of speaker comprising the loudspeaker of above-mentioned active refrigeration, the speaker is longer
Both sides offer the first opening and the second opening respectively, the frame extends fixed bracket at top, and the frame passes through
Fixed bracket is fixed in the first opening；The radiator is fixed in the second opening, and the cooling fin is stretched out from the second opening.
The cooling fin of radiator distributes heat in outside air, effectively radiates, and reduces semiconductor chilling plate heat
The temperature at end, it is ensured that the refrigeration effect of semiconductor chilling plate reduces the bulk temperature of loudspeaker.
Further, the utility model additionally provides another speaker comprising the loudspeaker of above-mentioned active refrigeration, it is described
Speaker offers the first opening and the second opening on longer both sides respectively, and the frame extends fixed bracket, institute at top
Frame is stated to be fixed in the first opening by fixed bracket；Second opening is inwardly formed air hose, and the air hose is in alignment with institute
State radiator.
When speaker operation, heat exchange is quickly carried out by air hose with external air inside speaker, is equivalent to scattered
The surface of hot device increases forced convection, and the temperature in cooling piece hot end can be effectively reduced, it is ensured that semiconductor chilling plate has good
Refrigeration effect.
The technical effect obtained based on above-mentioned technical solution, the utility model are as follows:
(1) loudspeaker of active refrigeration provided by the utility model, using active refrigeration module to the magnetic circuit system of loudspeaker
System cools down, and after the temperature of entire magnetic circuit system reduces, and then the temperature of corresponding voice coil heat source is also reduced, is kept away
Exempt from that temperature is too high to lead to voice coil thermal damage, finally reduce the bulk temperature of entire loudspeaker, improves limit input power.
(2) loudspeaker of the active refrigeration of the utility model, the active refrigeration module size used is small, and volume can be made
Less than 1cm3Refrigerator, light-weight, no mechanical driving part, noiseless, the working media of no liquid and gas in work,
It does not pollute the environment thus.
(3) temperature of magnetic circuit system can be effectively reduced by active refrigeration for the loudspeaker of the active refrigeration of the utility model,
The demagnetization problem of existing rubidium magnet under high temperature is avoided, while temperature resistant grade can be selected lower during preparing loudspeaker
Rubidium magnet, to reduce production cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the loudspeaker of the active refrigeration of the utility model.
Fig. 2 is the heat conduction model figure of the loudspeaker of the active refrigeration of the utility model.
Fig. 3 is the working principle diagram of the semiconductor chilling plate of the utility model.
Fig. 4 is the structural schematic diagram of one embodiment of the speaker of the loudspeaker with active refrigeration of the utility model.
Fig. 5 is the structural representation of another embodiment of the speaker of the loudspeaker with active refrigeration of the utility model
Figure.
Specific embodiment
The utility model is carried out more below in conjunction with attached drawing and specific embodiment for the ease of understanding the utility model,
Comprehensive description.The better embodiment of the utility model is given in attached drawing.But the utility model can be with many differences
Form realize, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making pair
The disclosure of the utility model understands more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Embodiment 1
Fig. 1 gives the structural schematic diagram of the loudspeaker of the active refrigeration of the present embodiment, as shown in Figure 1, a kind of active system
Cold loudspeaker, including frame 1 and the vibrational system being contained in frame 12 and magnetic circuit system 3, wherein vibrational system 2 includes
Vibrating diaphragm 21 and voice coil 22, magnetic circuit system 3 include T iron 31, magnet 32 and washer 33.As the heat source of loudspeaker, voice coil 22 passes through
The top of its winding section, which is fixed on vibrating diaphragm 21, to be vibrated.In magnetic circuit system 3, washer 33 and magnet 32 are located at the upper of T iron 31
Side, constitutes magnetic gap, voice coil 22 moves up and down in magnetic gap between washer 33 and magnet 32 and T iron 31.Voice coil produces when being powered
Raw heat rises the temperature of voice coil 22, since 22 voice coils are close at a distance from magnetic circuit system 3, but not in contact with, therefore
Voice coil rises the temperature of magnetic circuit system.
It should be noted that in the loudspeaker, active refrigeration module 4 has been fixedly installed at the back side of T iron 31, and actively
Refrigeration module 4 cools down to magnetic circuit system 3 by way of heat transfer.
Fig. 2 gives the heat conduction model figure of the loudspeaker of the active refrigeration of the present embodiment, as shown in Fig. 2, heat source voice coil
Heat a part passed to the components such as the frame skeleton of loudspeaker by way of conduction, a part passes through forced convection
Mode is dispersed into air, and most a part is transmitted on magnetic circuit by way of heat radiation；On skeleton and magnetic circuit system
Heat can be also dispersed into air by way of convection current, but due to the air-tight state of loudspeaker and speaker, be dispersed into air
Heat cannot be spread in time, still there are problems that hot-spot.In the present embodiment, by installing one additional on magnetic circuit system
Cold source: active refrigeration module, the active refrigeration module are fixed on the T iron surface of magnetic circuit system, cool down by force to magnetic circuit system,
It is equivalent to carry out mutual heat between cold source and voice coil heat source to exchange.
Due to the electrical power of input loudspeaker be it is constant, i.e. the heating power of heat source voice coil be it is fixed, when pass through increase
Add the refrigeration work consumption of cold source, the heat of magnetic circuit system will be transmitted to active refrigeration module in time, and can reduce sound naturally in this way
The temperature of circle and entire speaker system, thus avoid each component due to temperature is excessively high and risk there are cause thermal damage, Jin Erzeng
The limit of loudspeaker is added to bear power.
Fig. 3 gives the working principle diagram of the semiconductor chilling plate of the present embodiment, in conjunction with reference Fig. 1 and Fig. 3, active refrigeration
Module includes semiconductor chilling plate 41, fixing piece 42 and radiator 43, and wherein semiconductor chilling plate 41 is electrically connected with DC power supply 5
It connects, cold end 411 fits in the back side of T iron 31, and hot end 412 then fits on radiator 43, and fixing piece 42 is by radiator 43
It is fixed in T iron 31 with semiconductor chilling plate 41.
Semiconductor chilling plate 41 is made of two panels ceramic substrate, there is P-type semiconductor element 413 and N-type semiconductor among it
Element 414.The element material of P-type semiconductor element 413 and N-type semiconductor element 414 is bismuth telluride.When electric current is partly led from N-type
Volume elements part 414 flows to the connector of P-type semiconductor element 413, can absorb heat, becomes cold end 411；When electric current is partly led from p-type
Volume elements part 413 flows to the connector release heat of N-type semiconductor element 414, becomes hot end 412.Heat absorption and exothermic size are logical
The element logarithm of the size and P-type semiconductor element 413 of overcurrent and N-type semiconductor element 414 determines.
The cold end 411 of semiconductor chilling plate 41 fits in 31 surface of T iron, and hot end 412 then fits on radiator 43, due to
Radiator can the hot end to semiconductor chilling plate effectively radiate, such T iron will by more heats by contact conduction
To the cold end of cooling piece, after the temperature of entire magnetic circuit system reduces, correspondingly, the temperature of voice coil heat source can be also effectively reduced,
Realize the purpose for improving limit input power.
In the present embodiment, use thermoelectric semiconductor refrigeration component as active refrigeration module, the half of active refrigeration module
Conductor refrigeration chip size is small, and volume can be made less than 1cm3Refrigerator, it is light-weight, weight between several grams to tens grams it
Between；And active refrigeration module is without mechanical driving part, noiseless, the working media of no liquid and gas in work, because without
It pollutes the environment.
Also have the advantage that its cooling parameters not by space using the active refrigeration module of thermoelectric semiconductor refrigeration component
Direction and gravity influence, and under the conditions of big mechanical overload, also can normally work；By adjusting the big of operating current
It is small, conveniently adjusted cooling rate；Its work fast, long service life, and be easy to automatically control.
It should be noted that loudspeaker also can be used based on thermo-acoustic principles (sound wave system as another alternative
It is cold) active refrigeration module freeze, its working principle is that be based on thermoacoustic effect, solid dielectric and shake in sound field
The interaction between fluid is swung, is exchanged with each other between sound energy and thermal energy.The cooling power of minitype thermoacoustic refrigerator device exists
1W or so is under room temperature in hot end, and temperature drop is tens of degree.
It should be noted that radiator 43 is in the side far from semiconductor chilling plate 41, i.e., that side distributed towards heat
Multiple cooling fins 431 are provided with, guarantee to guarantee the refrigerating efficiency of cooling piece to the heat dissipation effect in semiconductor chilling plate hot end.And
Fixing piece 42 is screw, semiconductor chilling plate and T iron surface, and being spirally connected for semiconductor chilling plate and radiator is close, is carried out effective
Thermo-contact conduction.
The loudspeaker of the active refrigeration of the present embodiment is dropped using magnetic circuit system of the active refrigeration module to loudspeaker
Temperature after the temperature of entire magnetic circuit system reduces, and then the temperature of corresponding voice coil hot pressing is also reduced, avoids temperature too
Height leads to voice coil thermal damage, finally reduces the bulk temperature of entire loudspeaker, improves limit input power.
In addition, the temperature of magnetic circuit system can be effectively reduced by active refrigeration for loudspeaker, existing rubidium magnetic under high temperature is avoided
The demagnetization problem of iron can select temperature resistant grade lower rubidium magnet during preparing loudspeaker, be produced into reduce
This.
Embodiment 2
What Fig. 4 gave the present embodiment includes the speaker of the loudspeaker of active refrigeration, as shown in figure 4, the speaker is close
Enclosed speaker, the speaker 6 offer the first opening 61 and the second opening 62. wherein on longer both sides respectively, and frame 1 is at top
Extend fixed bracket 11；Frame 1 passes through fixed bracket 11 and is fixed in the first opening 61；Radiator 43, which is then fixed on second, to be opened
On mouth 62, the cooling fin 431 of radiator 43 is stretched out from the second opening 62.Cooling fin distributes heat to the outside air of speaker
In, it effectively radiates, reduces the temperature in 41 hot end of semiconductor chilling plate, it is ensured that the refrigeration effect of semiconductor chilling plate reduces
The bulk temperature of loudspeaker.
Embodiment 3
Fig. 5 give in another embodiment include active refrigeration loudspeaker speaker, as shown in figure 5, the sound
Case is open type speaker, which offers the first opening 61 and the second opening 62 on longer both sides respectively, and frame 1 is being pushed up
Extend fixed bracket 11 in portion；Frame 1 passes through fixed bracket 11 and is fixed in the first opening 61；It should be noted that second opens
Mouth 62 is inwardly formed air hose 63, and air hose 63 is in alignment with the radiator 43.When speaker operation, inside speaker and outside
Air quickly carries out heat exchange by air hose 63, is equivalent to and increases forced convection to the surface of radiator 43, system can be effectively reduced
The temperature in cold 41 hot ends, it is ensured that semiconductor chilling plate has good refrigeration effect.
The above content is only the structure example and explanation of the utility model, and the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these it is aobvious and
The alternative forms being clear to belong to the protection scope of the utility model.
Claims (6)
1. a kind of loudspeaker of active refrigeration, including frame (1) and the vibrational system (2) being contained in frame (1) and magnetic circuit system
It unites (3), the vibrational system (2) includes vibrating diaphragm (21) and voice coil (22), and the voice coil (22) is solid by the top of its winding section
It is scheduled on the vibrating diaphragm (21)；The magnetic circuit system (3) includes T iron (31), magnet (32) and washer (33), the washer (33)
It is located at the top of T iron (31) with magnet (32), constitutes magnetic gap between the washer (33) and magnet (32) and T iron (31), institute
Voice coil (22) is stated to move up and down in magnetic gap；It is characterized in that, further including the active refrigeration module for being fixed on T iron (31) back side
(4), the active refrigeration module (4) cools down to magnetic circuit system (3) by way of heat transfer.
2. the loudspeaker of active refrigeration according to claim 1, which is characterized in that the active refrigeration module includes partly leading
Body cooling piece (41), fixing piece (42) and radiator (43)；The semiconductor chilling plate (41) is electrically connected with DC power supply (5),
Its cold end (411) fits in the back side of T iron (31), and hot end (412) then fit on radiator (43)；The fixing piece (42) will
Radiator (43) and semiconductor chilling plate (41) are fixed on T iron (31).
3. the loudspeaker of active refrigeration according to claim 2, which is characterized in that the radiator (43) is partly led separate
The side of body cooling piece is provided with multiple cooling fins (431).
4. the loudspeaker of active refrigeration according to claim 2, which is characterized in that the fixing piece (42) is screw.
5. a kind of speaker, the loudspeaker including active refrigeration as claimed in claim 3, which is characterized in that the speaker (6) exists
Longer both sides offer the first opening (61) and the second opening (62) respectively, and the frame (1) extends fixed branch at top
Frame (11), the frame (1) pass through fixed bracket (11) and are fixed on the first opening (61)；The radiator (43) is fixed on
In two openings (62), the cooling fin (431) is stretched out from the second opening (62).
6. a kind of speaker, the loudspeaker including such as described in any item active refrigerations of claim 2-4, which is characterized in that described
Speaker (6) offers the first opening (61) and the second opening (62) on longer both sides respectively, and the frame (1) extends at top
Bracket (11) are fixed out, the frame (1) passes through fixed bracket (11) and is fixed on the first opening (61)；Second opening
(62) it is inwardly formed air hose (63), the air hose (63) is in alignment with the radiator (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820692586.6U CN208874730U (en) | 2018-05-10 | 2018-05-10 | A kind of loudspeaker and speaker of active refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820692586.6U CN208874730U (en) | 2018-05-10 | 2018-05-10 | A kind of loudspeaker and speaker of active refrigeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208874730U true CN208874730U (en) | 2019-05-17 |
Family
ID=66461480
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820692586.6U Expired - Fee Related CN208874730U (en) | 2018-05-10 | 2018-05-10 | A kind of loudspeaker and speaker of active refrigeration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616795A (en) * | 2018-05-10 | 2018-10-02 | 惠州超声音响有限公司 | A kind of loud speaker of active refrigeration |
| CN113709609A (en) * | 2021-09-15 | 2021-11-26 | 国光电器股份有限公司 | Sound box |
| CN114650489A (en) * | 2022-03-10 | 2022-06-21 | 歌尔股份有限公司 | Loudspeaker and sound production equipment |
-
2018
- 2018-05-10 CN CN201820692586.6U patent/CN208874730U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616795A (en) * | 2018-05-10 | 2018-10-02 | 惠州超声音响有限公司 | A kind of loud speaker of active refrigeration |
| CN108616795B (en) * | 2018-05-10 | 2023-12-22 | 惠州迪芬尼声学科技股份有限公司 | Loudspeaker box comprising active refrigeration loudspeaker |
| CN113709609A (en) * | 2021-09-15 | 2021-11-26 | 国光电器股份有限公司 | Sound box |
| CN114650489A (en) * | 2022-03-10 | 2022-06-21 | 歌尔股份有限公司 | Loudspeaker and sound production equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190517 |