CN203827487U - Full-frequency noise reduction protective sleeve for automobile loudspeaker - Google Patents
Full-frequency noise reduction protective sleeve for automobile loudspeaker Download PDFInfo
- Publication number
- CN203827487U CN203827487U CN201420232899.5U CN201420232899U CN203827487U CN 203827487 U CN203827487 U CN 203827487U CN 201420232899 U CN201420232899 U CN 201420232899U CN 203827487 U CN203827487 U CN 203827487U
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- layer
- expanded ptfe
- noise reduction
- microporous membrane
- pressure
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- 230000001681 protective effect Effects 0.000 title claims abstract description 48
- 230000009467 reduction Effects 0.000 title claims abstract description 29
- 239000010410 layer Substances 0.000 claims abstract description 142
- 239000012982 microporous membrane Substances 0.000 claims abstract description 43
- 229920000742 Cotton Polymers 0.000 claims abstract description 32
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 27
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 80
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 80
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000012528 membrane Substances 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 abstract 4
- 239000000463 material Substances 0.000 description 10
- 229920002635 polyurethane Polymers 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000012857 repacking Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
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- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- 241000894006 Bacteria Species 0.000 description 1
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Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a full-frequency noise reduction protective sleeve for an automobile loudspeaker. The full-frequency noise reduction protective sleeve comprises a basin-shaped sound absorbing cotton layer, and expanded polytetrafluoroethylene microporous membrane layers or expanded polytetrafluoroethylene modified membrane layers which are respectively compounded on both sides of the sound absorbing cotton layer, the expanded polytetrafluoroethylene microporous membrane layer or the expanded polytetrafluoroethylene modified membrane layer on one side is connected with a pressure-sensitive adhesive layer, and is fixed outside the loudspeaker through the pressure-sensitive adhesive layer at a distance ranging from 5 to 15mm. Through the method, the full-frequency noise reduction protective sleeve has strong full-frequency sound absorbing ability, very obvious full-frequency sound absorbing effect, can better adsorb low-medium frequency noises, can substantially adsorb automobile noises so as to make pleasant sounds, and has the advantages of flame retardance, waterproof and dustproof performance, sound pressure permeability ( balanced internal and external pressure), long service life and weldability.
Description
Technical field
The utility model relates to a kind of auto loud hailer full range noise reduction protective cover.
Background technology
Vehicle price continuous decrease, some producers have to that under the pressure of cost pressure car is carried out to some and change, and use low-grade parts in some links, and a lot of producers bring into use regenerated plastics; The corrective measure of Automobile Enterprises causes whole industry in quality problems, to occur roughly the same: low side economy car shell cost is lower, seal is bad, middle-grade car has reduced the material cost of interior trim, cause the rainwater-proof of car door and the hydraulic performance decline of sound insulation vibration damping, especially larger on the loud speaker impact of car door below.
Investigation finds really to exist the phenomenon of cost squeeze on auto loud hailer, and a lot of economy cars have all used cheap auto loud hailer for cost-saving.Loudspeaker support is again basin frame, is mainly divided into two kinds of materials of plastics and metal.Metallic support, except sturdy and durable, can also ensure to stablize in loud speaker vibrations.The loud speaker of a lot of economy cars has also adopted plastic stent, due to loud speaker be mounted in car door and rear seat windscreen under, summer, vehicle interior temperature was higher, is can generate heat after magnet and coil electricity below basin frame, plastic tub frame service time slightly long just may temperature distortion, thereby affect tonequality; Automotive upholstery is generally cloth and carpet, is absorbing sound and lowering noise not substantially, and in the time that automobile is advanced middle broadcasting music, various noises occur simultaneously together, form a complicated acoustics, have constriction in sense of hearing, and the mood that impact is driven, is unfavorable for traffic safety.Therefore use the acoustics of less cost improvement low and middle-end economy car just necessary.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of auto loud hailer full range noise reduction protective cover, can have the ability of full range absorbing sound and lowering noise, rainwater-proof invasion and attack, radiate heat and ventilate, ventilative acoustic pressure internal and external equilibrium, improves greatly acoustics.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of auto loud hailer full range noise reduction protective cover is provided, comprise: basin shape acoustical cotton layer and be compound in respectively microporous membrane layer or the expanded PTFE modified film layer of the expanded PTFE of acoustical cotton layer both sides, wherein on the microporous membrane layer of a side expanded PTFE or expanded PTFE modified film layer, be connected with pressure-sensitive adhesive layer, be fixed on outside loud speaker by described pressure-sensitive adhesive layer, and with loud speaker spacing 5-15mm.
In preferred embodiment of the utility model, the thickness of this protective jacket is 7-10mm, and the thickness of the microporous membrane layer of described expanded PTFE or expanded PTFE modified film layer is 0.10-0.14mm.
In preferred embodiment of the utility model, between the microporous membrane layer of acoustical cotton layer and expanded PTFE or expanded PTFE modified film layer, be connected by adhesive.
In preferred embodiment of the utility model, described pressure-sensitive adhesive layer is wide is 15-25mm, and surface is covered with protective paper.
In preferred embodiment of the utility model, be located at the microporous membrane layer of expanded PTFE of basin shape acoustical cotton layer inner side or expanded PTFE modified film layer along basin along flange, and bond by pressure-sensitive adhesive layer with microporous membrane layer or the expanded PTFE modified film layer of the expanded PTFE of being located at basin shape acoustical cotton layer outside.
The beneficial effects of the utility model are: the full range sound absorbing power of the utility model auto loud hailer full range noise reduction protective cover is strong, full range sound-absorbing effect is fairly obvious, especially centering low frequency noise absorbs better, can significantly absorb car noise, enable voice is melodized, has anti-flammability, water proof and dust proof, acoustic pressure gas permeability (internal and external pressure balance), long-life and weldability concurrently simultaneously.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing, wherein:
Fig. 1 is that the utility model auto loud hailer full range noise reduction protective overlaps the structural representation of a preferred embodiment;
In accompanying drawing, the mark of each parts is as follows: 1, acoustical cotton layer, 2, microporous membrane layer or the expanded PTFE modified film layer of expanded PTFE, 3, pressure-sensitive adhesive layer, 4, protective paper.
Embodiment
To the technical scheme in the utility model embodiment be clearly and completely described below, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, the utility model embodiment comprises:
Embodiment 1:
A kind of auto loud hailer full range noise reduction protective cover, comprise: basin shape acoustical cotton layer 1 and be compound in respectively microporous membrane layer or the expanded PTFE modified film layer 2 of the expanded PTFE of acoustical cotton layer 1 both sides, the thickness of this protective jacket is 7mm, and the thickness of the microporous membrane layer of described expanded PTFE or expanded PTFE modified film layer 2 is 0.10mm.
Wherein on the microporous membrane layer of a side expanded PTFE or expanded PTFE modified film layer 2, be connected with a circle pressure-sensitive adhesive layer 3, described pressure-sensitive adhesive layer 3 is wide is 15mm, and surface is covered with protective paper 4, in when repacking, only need throw off separate paper and car door position is bonding.
This protective jacket is fixed in the door panel after loud speaker by described pressure-sensitive adhesive layer 3, and with loud speaker spacing 5mm.
While making protective jacket, to be located at the microporous membrane layer of expanded PTFE of basin shape acoustical cotton layer 1 inner side or expanded PTFE modified film layer 2 along basin along flange, and be located at the microporous membrane layer of expanded PTFE in basin shape acoustical cotton layer 1 outside or expanded PTFE modified film layer 2 by the fixing bonding of pressure-sensitive adhesive layer 3.
Embodiment 2:
A kind of auto loud hailer full range noise reduction protective cover, comprise: basin shape acoustical cotton layer 1 and be compound in respectively microporous membrane layer or the expanded PTFE modified film layer 2 of the expanded PTFE of acoustical cotton layer 1 both sides, the thickness of this protective jacket is 8.5mm, and the thickness of the microporous membrane layer of described expanded PTFE or expanded PTFE modified film layer 2 is 0.12mm.
Wherein on the microporous membrane layer of a side expanded PTFE or expanded PTFE modified film layer 2, be connected with a circle pressure-sensitive adhesive layer 3, described pressure-sensitive adhesive layer 3 is wide is 20mm, and surface is covered with protective paper 4, in when repacking, only need throw off separate paper and car door position is bonding.
This protective jacket is fixed in the door panel after loud speaker by described pressure-sensitive adhesive layer 3, and with loud speaker spacing 10mm;
While making protective jacket, to be located at the microporous membrane layer of expanded PTFE of basin shape acoustical cotton layer 1 inner side or expanded PTFE modified film layer 2 along basin along flange, and be located at the microporous membrane layer of expanded PTFE in basin shape acoustical cotton layer 1 outside or expanded PTFE modified film layer 2 by the fixing bonding of pressure-sensitive adhesive layer 3.
Embodiment 3:
A kind of auto loud hailer full range noise reduction protective cover, comprise: basin shape acoustical cotton layer 1 and be compound in respectively microporous membrane layer or the expanded PTFE modified film layer 2 of the expanded PTFE of acoustical cotton layer 1 both sides, the thickness of this protective jacket is 10mm, and the thickness of the microporous membrane layer of described expanded PTFE or expanded PTFE modified film layer 2 is 0.14mm.
Wherein on the microporous membrane layer of a side expanded PTFE or expanded PTFE modified film layer 2, be connected with a circle pressure-sensitive adhesive layer 3, described pressure-sensitive adhesive layer 3 is wide is 25mm, and surface is covered with protective paper 4, in when repacking, only need throw off separate paper and car door position is bonding.
This protective jacket is fixed in the door panel after loud speaker by described pressure-sensitive adhesive layer 3, and with loud speaker spacing 15mm;
While making protective jacket, to be located at the microporous membrane layer of expanded PTFE of basin shape acoustical cotton layer 1 inner side or expanded PTFE modified film layer 2 along basin along flange, and be located at the microporous membrane layer of expanded PTFE in basin shape acoustical cotton layer 1 outside or expanded PTFE modified film layer 2 by the fixing bonding of pressure-sensitive adhesive layer 3.
Described acoustical cotton layer 1 is melt-blown high polymer fibre thin layer, is to utilize high velocity, hot air to carry out hot melt in polymer, and the temperature of hot melt is 310 DEG C ~ 374 DEG C.
Again the polymer drawing-off of melting being elongated to length is 25 ~ 100mm, and then the superfine fibre of average diameter <18 μ m forms fleece thin layer by superfine fibre cooling curing on receiving system, is acoustical cotton layer 1;
Described expanded PTFE modified film layer is that eptfe film modification is formed to expanded PTFE modified film layer.
The core technology of the manufacture of the microporous membrane of expanded PTFE is: polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid, give and be pressed into cylinder blank, by rolling process, cylinder blank is laminated, through sloughing extrusion aid, stretching, thermal finalization, finally make the microporous membrane of expanded PTFE.
The microporous membrane of expanded PTFE is a kind of macromolecule new material film with specific function high added value, make through biaxial tension through special process, the microfibre of this film has formed the inside and outside micropore in 0.1 penetrating μ m aperture, μ m ~ 18, is the ventilated membrane of real meaning.Film surface can reach tens micropores per square inch, each micro-pore diameter is less than the minimum value of the mist globule, and (20 μ m-100 μ m), and much larger than water vapour molecule diameter, (0.0003 μ m-0.0004 μ m), this film can make steam by and water droplet can not pass through greatly because of surperficial tension, utilize this microcellular structure can reach outstanding Waterproof Breathable airway dysfunction; Because of extremely tiny and longitudinal substandard bend alignment of this hole, the microporous membrane of the expanded PTFE of ectonexine also has the excellent ability of full range absorbing sound and lowering noise in addition.
Between the microporous membrane layer of acoustical cotton layer 1 and expanded PTFE or expanded PTFE modified film layer 2, be connected by spraying polyurethane adhesive.
Architectural characteristic after the microporous membrane layer of acoustical cotton layer 1 and expanded PTFE or expanded PTFE modified film layer 2 are compound is: in material, have a large amount of, that interpenetrate, from showing micropore, also have certain gas permeability and noise reduction performance.The sound-absorbing principle of many micropores matter sound-absorbing material is vibrate air while passing in and out from slot, and air molecule and material and self friction, be transformed into heat energy acoustic energy, and noise energy has consumed in this new composite material.Much closeer Kong Yue is, full range noise reduction sound absorbing power is stronger, form a kind of specific function new material of high performance full range sound-absorbing, in the time that sound wave incides this many micropores new material surface, cause the air vibration in micropore, due to viscous resistance and the conduction of heat of frictional resistance and air, quite a few acoustic energy is converted into heat energy, sound equipment acoustic pressure has reduced by 5 ~ 7dB within the scope of full range, full range sound-absorbing effect is fairly obvious, especially to low, intermediate frequency noise absorption is better, be applied on the tone quality improving and protection of auto loud hailer, can in whole frequency range, absorb noise, give comfortable sound equipment of people environment of driving.
The processing technology of auto loud hailer full range noise reduction protective cover, as described below:
1) technological preparation, comprises microporous membrane layer, expanded PTFE modified film layer, acoustical cotton layer 1 and the pressure-sensitive adhesive layer 3 of expanded PTFE;
2) the microporous membrane layer of expanded PTFE or expanded PTFE modified film layer 2 are layed in a basin shape die;
3) at microporous membrane layer or the expanded PTFE modified film layer 2 surface spraying polyurethane adhesive of expanded PTFE, and acoustical cotton layer 1 is placed on described polyurethane adhesive;
4) at acoustical cotton layer 1 surface spraying polyurethane adhesive, and on polyurethane adhesive, lay microporous membrane layer or the expanded PTFE modified film layer 2 of expanded PTFE;
5) complete after above-mentioned steps, by punch and die pressing, and heat in basin shape mould, in order to each layer of bonding, heating-up temperature is 90 DEG C ~ 100 DEG C;
6) can parting take out protective jacket after having heated, carrying out coolingly, be more than or equal to 24 hours cooling time;
7) after cooling, the microporous membrane layer of expanded PTFE or the bonding pressure-sensitive adhesive layer 3 in edge of expanded PTFE modified film layer 2 of basin shape protective jacket inner side will be located at, and carry out flange, bonding with microporous membrane layer or the expanded PTFE modified film layer 2 of the expanded PTFE in outside;
8) at the microporous membrane layer of expanded PTFE or the edge surface binded pressure-sensitive adhesive layer 3 of expanded PTFE modified film layer 2 of being located at basin shape protective jacket outside, the width of pressure-sensitive adhesive layer 3 is 20mm;
9), finally to completing the test of testing of the protective jacket of processing, pack after qualified.
Auto loud hailer full range noise reduction protective cover full range sound absorbing power is strong, full range sound-absorbing effect is fairly obvious, especially centering low frequency noise absorbs better, can significantly absorb car noise, enable voice is melodized, has the advantages such as anti-flammability, water proof and dust proof, acoustic pressure gas permeability (internal and external pressure balance), long-life and weldability concurrently simultaneously.
1) auto loud hailer full range noise reduction protective cover composite material, in the time that noise waves incides this many micropores new material surface, cause the air vibration in micropore, due to viscous resistance and the conduction of heat of frictional resistance and air, quite a few acoustic energy is converted into heat energy, noise waves is further decayed and is converted into after heat energy through the less micropore of eptfe membrane, sound equipment acoustic pressure has reduced by 5 ~ 7dB within the scope of full range, full range sound-absorbing effect is fairly obvious, especially centering low frequency noise absorbs better, be applied on high-fidelity audio equipment and loud speaker, can in whole frequency range, absorb noise, leave dulect music, its ambient noise will greatly reduce, give comfortable environment of driving of people.
2) auto loud hailer full range noise reduction protective cover keeps loud speaker inside and outside air pressure balance: reduce the impact stress on acoustic pressure wave heap internal component, fall the electric short circuit accident that low fogging condensation phenomenon causes and occur, improve reliability and extend useful life of product.
3) environmental protection: the auto loud hailer full range noise reduction protective cover material of environmental protection, white nontoxic free from extraneous odour, non-volatility gas, nuisanceless pollution, containing carcinogen;
4) anti-flammability: auto loud hailer full range noise reduction protective cover has good thermal endurance, can be used for a long time 125 DEG C of left and right.Auto loud hailer full range noise reduction protective cover has good thermal endurance, and fire protecting performance (anti-flammability) material meets automotive trim requirement completely, improves life and property safety.
5) protection against the tide: auto loud hailer full range noise reduction protective cover hydrophobicity, without mouldy, bacteria breed, the generation of rotten and bad smell, guarantees long-time stability.Under wet environment, absorbing sound and lowering noise ability is constant.
6) high insulation: auto loud hailer full range noise reduction protective cover has good insulation property, because it absorbs water hardly, therefore insulation property are not subject to the impact of humidity.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (5)
1. an auto loud hailer full range noise reduction protective cover, it is characterized in that, comprise: basin shape acoustical cotton layer and be compound in respectively microporous membrane layer or the expanded PTFE modified film layer of the expanded PTFE of acoustical cotton layer both sides, wherein on the microporous membrane layer of a side expanded PTFE or expanded PTFE modified film layer, be connected with pressure-sensitive adhesive layer, be fixed on outside loud speaker by described pressure-sensitive adhesive layer, and with loud speaker spacing 5-15mm.
2. auto loud hailer full range noise reduction protective cover according to claim 1, is characterized in that, the thickness of this protective jacket is 7-10mm, and the thickness of the microporous membrane layer of described expanded PTFE or expanded PTFE modified film layer is 0.10-0.14mm.
3. auto loud hailer full range noise reduction protective cover according to claim 1, is characterized in that, between the microporous membrane layer of acoustical cotton layer and expanded PTFE or expanded PTFE modified film layer, is connected by adhesive.
4. auto loud hailer full range noise reduction protective cover according to claim 1, is characterized in that, described pressure-sensitive adhesive layer is wide is 15-25mm, and surface is covered with protective paper.
5. auto loud hailer full range noise reduction protective cover according to claim 1, it is characterized in that, be located at the microporous membrane layer of expanded PTFE of basin shape acoustical cotton layer inner side or expanded PTFE modified film layer along basin along flange, and bond by pressure-sensitive adhesive layer with microporous membrane layer or the expanded PTFE modified film layer of the expanded PTFE of being located at basin shape acoustical cotton layer outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232899.5U CN203827487U (en) | 2014-05-08 | 2014-05-08 | Full-frequency noise reduction protective sleeve for automobile loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232899.5U CN203827487U (en) | 2014-05-08 | 2014-05-08 | Full-frequency noise reduction protective sleeve for automobile loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203827487U true CN203827487U (en) | 2014-09-10 |
Family
ID=51482938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420232899.5U Expired - Lifetime CN203827487U (en) | 2014-05-08 | 2014-05-08 | Full-frequency noise reduction protective sleeve for automobile loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203827487U (en) |
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2014
- 2014-05-08 CN CN201420232899.5U patent/CN203827487U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190110 Address after: 213165 28-8 Liban Road, Bangshang Village, Lijia Town, Wujin District, Changzhou City, Jiangsu Province Patentee after: PANASIAN MICROVENT TECH (JIANGSU) Corp. Address before: 213165 No. 28-8, Li ban Road, Lijia Town, Wujin District, Changzhou, Jiangsu. Patentee before: PAN-ASIAN AUTOMOTIVE GARNISHRY (CHANGZHOU) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP02 | Change in the address of a patent holder |
Address after: 213000 No.8 Qiancao Road, Lijia Town, Wujin District, Changzhou City, Jiangsu Province Patentee after: PANASIAN MICROVENT TECH (JIANGSU) Corp. Address before: 213165, No. 28-8, Sakamoto Road, Sakamoto village, Lijia Town, Wujin District, Jiangsu, Changzhou Patentee before: PANASIAN MICROVENT TECH (JIANGSU) Corp. |
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| CP02 | Change in the address of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |
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| CX01 | Expiry of patent term |