CN203788447U - Microminiature sound box - Google Patents
Microminiature sound box Download PDFInfo
- Publication number
- CN203788447U CN203788447U CN201420013909.6U CN201420013909U CN203788447U CN 203788447 U CN203788447 U CN 203788447U CN 201420013909 U CN201420013909 U CN 201420013909U CN 203788447 U CN203788447 U CN 203788447U
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- CN
- China
- Prior art keywords
- audio amplifier
- sound
- silencing cavity
- microminiature
- sound box
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- 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.)
- Expired - Fee Related
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model discloses a microminiature sound box comprising a sound box body. The sound box body is internally provided with one sound attenuation cavity with multiple openings. The sound attenuation cavity has airways interconnected to one another. An air outlet is formed in one side of the sound box body. One opening of the sound attenuation cavity is connected with the air outlet. With the adoption of the abovementioned scheme, when air enters the air outlet, the sound pressure is reduced by 40db, and the sound and the sound pressure of the anti-phase are minimized not to interfere the normal sound production of the sound box, so that the sound box is good in sound generation low and medium frequency response, and distinct and clear in tone quality, and solves a disadvantage that the low and medium frequency response of the microminiature sound box is poor.
Description
Technical field
The utility model relates to a kind of microminiature audio amplifier.
Background technology
The design of audio amplifier comes from loudspeaker performance, and loud speaker pronunciation principle is to be changed as electroacoustic by the driving original paper of loud speaker as everyone knows.Loudspeaker voice coil is magnetic field force induced driving in magnetic field, and drive is roused paper (sound basin) porpoise and formed sound.Before the bulging paper forming but drum paper vibrates, after sound and drum paper, sound is anti-phase in " phase place ", differs 180 degree.The sound of these two kinds of single spin-echos is aloft interfered mutually, makes the audio distortions of loud speaker.In order to isolate the sound source of these two single spin-echos, so just there has been audio amplifier.The effect of audio amplifier is exactly the sound source of isolating a single spin-echo in essence, eliminates and because phase place is different, forms interference of sound root.
Audio amplifier varies in size but its cardinal principle is the same, and loudspeaker vibrophone operating time on audio amplifier seesaws, can be by audio amplifier (supposing an airtight audio amplifier) interior air " compression " or " drawing pine ".Now, if audio amplifier is enough large, and in case air to draw by compression pine to cause counter-force (to the back-pressure of loudspeaker vibrophone contract anti-La Songli) be negligible, but little miniature loudspeaker box is quite different, because little this counter-force of volume is very large.Make audio amplifier sounding in low-frequency range, especially hinder loud speaker normal articulation, make low cut serious, sound can serious distortion.If now open a venthole after audio amplifier, can effectively solve counter-force (having statement above) problem, but bring anti-phase sound to spill from hole, interfered again the normal sounding of loud speaker.This is the problem of the upper contradiction of little miniature loudspeaker box design: have venthole to solve little Microspeaker drum paper " counter-force " problem, but brought the problem of the normal sound of anti-phase interference of sound.Existing human hair understands a kind of " passive loudspeaker " (one claims radiation loudspeaker), this loudspeaker itself are initiatively pronunciation not, but acoustical vibration in can be along with case in small audio amplifier and vibrating, this vibration is passive, be to bulge when in case, air is compressed, when in case, air is drawn pine, inwardly recessed, it can supplement the change in volume of air in case, thereby reduces the initiatively counter-force damping action of loudspeaker.But it's a pity very much, the vibration of passive loudspeaker is contrary with the vibration of active loudspeaker, be that the sound that it sends is " anti-phase sound ", this sound still can be interfered normal loudspeaker pronunciation, make it pronunciation muddy, for fear of this embarrassment, someone designs very heavyly by its oscillating plate of passive loudspeaker, even want steel plate to replace, this is to allow the resonance frequency of passive loudspeaker fall the end below 20HZ, thereby make people not hear (hearing of people's ear is 20HZ-20KHZ), this thought is correct undoubtedly, but what make people's despair is, since be that microminiature audio amplifier is selected loudspeaker, must be hypomegetic, and the passive loudspeaker resonance point design of microminiature is very difficult below 20HZ, in any case this also does microminiature audio amplifier well in sound low-frequency range.
Summary of the invention
It is as follows that the utility model solves the problems of the technologies described above taked technical scheme:
A kind of microminiature audio amplifier, comprise audio amplifier body, described audio amplifier body interior is provided with a silencing cavity with a plurality of openings, and silencing cavity inside has a plurality of air flues that interconnect, described audio amplifier body one side is provided with air admission hole, and another opening of silencing cavity is connected with described pore.
Preferably, described silencing cavity is shaped as deltiod or round pipe shape or narrow slit shape.
Preferably, described in the air flue that interconnects be irregularly shaped, it forms a labyrinth-like each other, is referred to as silencing cavity.
Preferably, described silencing cavity inside is filled out and is put sound-absorbing thing, or silencing cavity itself consists of quieter material.
Preferably, described sound-absorbing filler is acoustical cotton or sponge.
Preferably, the independent moulding of described silencing cavity, and put into audio amplifier, wherein, the gas outlet of silencing cavity and audio amplifier are given vent to anger to coincide and are sealed.
After the utility model has been taked such scheme, when air releases blowhole, its acoustic pressure has reduced about 40db, now the sound of this " anti-phase ", acoustic pressure are little of being not enough to " interference " normal audio amplifier sounding, thus, the response of this audio amplifier sounding medium and low frequency is normal, and sound clarity is clean, its solution the disadvantage of little miniature loudspeaker box medium and low frequency difference in response.
Other features and advantages of the utility model will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the utility model.The purpose of this utility model and other advantages can be realized and be obtained by specifically noted structure in the specification write, claims and accompanying drawing.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in detail, so that above-mentioned advantage of the present utility model is clearer and more definite.
Fig. 1 is the structure explosive view of the utility model microminiature audio amplifier;
Fig. 2 is the structural representation of the utility model microminiature audio amplifier.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.
As illustrated in fig. 1 and 2, design principle of the present utility model is to solve the problem that microminiature audio amplifier is given vent to anger, and has solved again anti-phase interference of sound problem simultaneously.
For this reason, in audio amplifier, design a silencing pipeline, or noise reduction cavity, make air freely flow out and to flow at venthole, meanwhile, sound press is reduced to about 40db.
Specifically, a microminiature audio amplifier, comprises audio amplifier body 4, and inside is provided with loudspeaker vibrophone 401 and loudspeaker horn 402, wherein, unlike the prior art, described audio amplifier body interior is provided with a silencing cavity with a plurality of openings, and silencing cavity inside has a plurality of air flues that interconnect 1, comprising a main airway as the outlet pipe of small audio amplifier, other are as silencing cavity, and described audio amplifier body one side is provided with pore, and an opening of silencing cavity is connected with described pore.
Wherein, described silencing cavity be shaped as deltiod or round pipe shape or narrow slit shape, the present invention does not limit this.
Preferably, described in the air flue that interconnects be irregularly shaped, it forms a labyrinth-like 2 each other.
Preferably, described silencing cavity inside is filled out and is put sound-absorbing thing 3, for example, and acoustical cotton or sponge etc.
After the utility model has been taked such scheme, when air circulates with the pipeline of giving vent to anger, sound wave overflows and enters into silencing cavity to surrounding, its major part is by radio reception material absorbing wherein, when last air releases blowhole, its acoustic pressure has reduced about 40db, and now the sound of this " anti-phase ", acoustic pressure are little of being not enough to " interference " audio amplifier sounding normally.
Preferably, during fabrication, silencing cavity can independent figuration manufacture, and after being shaped, silencing cavity can be put in audio amplifier, makes work simplification, cost.
Finally it should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. a microminiature audio amplifier, comprise audio amplifier body, it is characterized in that, described audio amplifier body interior is provided with a silencing cavity with a plurality of openings, and silencing cavity inside has a plurality of air flues that interconnect, described audio amplifier body one side is provided with air admission hole, and another opening of silencing cavity is connected with described pore.
2. microminiature audio amplifier according to claim 1, is characterized in that, described silencing cavity be shaped as deltiod or round pipe shape or narrow slit shape.
3. microminiature audio amplifier according to claim 1, is characterized in that, described in the air flue that interconnects be irregularly shaped, it forms a labyrinth-like each other, is referred to as silencing cavity.
4. microminiature audio amplifier according to claim 1, is characterized in that, described silencing cavity inside is filled out and put sound-absorbing thing, or silencing cavity itself consists of quieter material.
5. microminiature audio amplifier according to claim 4, is characterized in that, described sound-absorbing filler is acoustical cotton or sponge.
6. microminiature audio amplifier according to claim 1, is characterized in that, the independent moulding of described silencing cavity, and put into audio amplifier, wherein, the gas outlet of silencing cavity and audio amplifier are given vent to anger to coincide and are sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420013909.6U CN203788447U (en) | 2014-01-10 | 2014-01-10 | Microminiature sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420013909.6U CN203788447U (en) | 2014-01-10 | 2014-01-10 | Microminiature sound box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203788447U true CN203788447U (en) | 2014-08-20 |
Family
ID=51324595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420013909.6U Expired - Fee Related CN203788447U (en) | 2014-01-10 | 2014-01-10 | Microminiature sound box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203788447U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016034013A1 (en) * | 2014-09-01 | 2016-03-10 | 歌尔声学股份有限公司 | Speaker module |
| CN106101916A (en) * | 2016-06-29 | 2016-11-09 | 广东欧珀移动通信有限公司 | Acoustic structure and electronic equipment |
| US10542344B2 (en) | 2014-09-01 | 2020-01-21 | Goertek Inc. | Loudspeaker module and manufacturing method thereof |
-
2014
- 2014-01-10 CN CN201420013909.6U patent/CN203788447U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016034013A1 (en) * | 2014-09-01 | 2016-03-10 | 歌尔声学股份有限公司 | Speaker module |
| WO2016033865A1 (en) * | 2014-09-01 | 2016-03-10 | 歌尔声学股份有限公司 | Speaker module |
| US10299033B2 (en) | 2014-09-01 | 2019-05-21 | Goertek Inc. | Loudspeaker module |
| US10542344B2 (en) | 2014-09-01 | 2020-01-21 | Goertek Inc. | Loudspeaker module and manufacturing method thereof |
| CN106101916A (en) * | 2016-06-29 | 2016-11-09 | 广东欧珀移动通信有限公司 | Acoustic structure and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20150110 |
|
| EXPY | Termination of patent right or utility model |