CN201274562Y - Minimized microphone - Google Patents
Minimized microphone Download PDFInfo
- Publication number
- CN201274562Y CN201274562Y CNU2008201465379U CN200820146537U CN201274562Y CN 201274562 Y CN201274562 Y CN 201274562Y CN U2008201465379 U CNU2008201465379 U CN U2008201465379U CN 200820146537 U CN200820146537 U CN 200820146537U CN 201274562 Y CN201274562 Y CN 201274562Y
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- CN
- China
- Prior art keywords
- microphone
- shell
- diaphragm group
- vibrating diaphragm
- pole base
- 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.)
- Expired - Lifetime
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The utility model provides a miniature microphone, which comprises a shell, a vibrating diaphragm group that is arranged inside the shell, a gasket that is connected with the vibrating diaphragm group, a back pole seat that is connected with the gasket, a back pole plate and a connection ring that is arranged inside the back pole seat, and a circuit board that is covered on the shell, and is characterized in that the shell is in interference fit with the back pole seat, and the back pole seat is provided with at least one aeration groove, and the air inside a rear cavity of an internal acoustic cavity of the microphone is discharged through the aeration groove. The microphone has favorable sensitivity while maintaining the favorable air tightness.
Description
Technical field
The present invention relates to a kind of microphone, relate in particular to a kind of electret microphone.
Background technology
Mobile communication technology is rapidly developed in recent years.The consumer uses mobile communication equipment more and more, and for example portable phone, the portable phone that can surf the Net, personal digital assistant, laptop computer, laptop computer, figure input card maybe can be by other equipment public or that dedicated communications network communicates.The technological progress of the expansion at honeycomb networking and mobile communication aspect makes more consumers use mobile communication equipment.
The consumer not only is satisfied with and can converses the requirement of mobile communication equipment, and want high-quality communication effect can be provided, especially the development of mobile multimedia technology, the speech quality of mobile phone becomes more important, the microphone of mobile phone is as the voice device of mobile phone, and its design quality directly influences speech quality.And speech quality depends on the sensitivity of microphone to a great extent.
Fit clearance between microphone inner body and the shell is wayward, can cause product seriously to leak gas like this.This has influenced the electroacoustic performance of product to a great extent.And in order to obtain good sealing effectiveness, normally seal with sealing glue in microphone inside, because glue flows easily, sealing is too strong, can cause the back cavity of the inner operatic tunes of microphone to form airtight cavity easily, increase the resistance of diaphragm vibration, influence the sensitivity of microphone.Therefore, how to guarantee the good bubble-tight while, the sensitivity that can improve microphone becomes the problem that needs solve.
The utility model content
The purpose of this utility model is to provide a kind of maintenance the good bubble-tight while, the mini microphone with excellent sensitivity.
For reaching above-mentioned technical purpose, the technical solution adopted in the utility model is:
A kind of mini microphone, comprise shell, be contained in the circuit board that vibrating diaphragm group, the pad that links to each other with the vibrating diaphragm group, the back-pole base that links to each other with pad, the back pole plate that is contained in back-pole base and connecting ring in the shell and lid are connected to shell, it is characterized in that: shell is an interference fit with the back-pole base that is contained in it, back-pole base is provided with at least one ventilating groove, and the air in the back cavity of the inner operatic tunes of microphone is discharged the described operatic tunes by described ventilating groove.
Preferably, described ventilating groove is the annular gas permeable groove.
Preferably, the angle of described annular gas permeable groove be 180 spend to 270 the degree between.
The beneficial effects of the utility model are: because shell is an interference fit with the back-pole base of accommodating in it, have good air-tightness so guaranteed microphone; Because back-pole base is provided with at least one ventilating groove, the air in the back cavity of the inner operatic tunes of microphone is discharged the described operatic tunes by described ventilating groove, so reduced the acoustic resistance of diaphragm group vibration, the sensitivity that has improved microphone.To sum up, the utility model has been realized making microphone also have good sensitivity keeping the good bubble-tight while of microphone.
Description of drawings
Fig. 1 is the structure chart of microphone among the embodiment providing of the utility model;
Fig. 2 is the structure chart of the back-pole base that has ventilating groove that provides of the utility model;
Fig. 3 is the passage that adopts air-flow after the scheme that the utility model provides.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, the microphone that the utility model provides comprises shell 1, be contained in vibrating diaphragm group 2 in the shell 1, be positioned over pad 3 on the vibrating diaphragm group 2, with the back-pole base 5 of pad 3 adjacency, be embedded at the back pole plate 4 in the back-pole base 5, the connecting ring 6 that links to each other with back pole plate 4, and with the circuit board 7 of shell 1 electric connection.Wherein, back pole plate 4, connecting ring 6, be accommodated in the back-pole base 5 respectively.
Shell 1 can adopt different shape (for example cup-shaped, rectangle, D shape shape or trapezoidal shape).Shell 1 can be made by a plurality of alternating layers of electric conducting material and non-conducting material, perhaps can apply conductive coating on the non-conductive layer inboard, and vibrating diaphragm group 2 can be electrically connected on the circuit board 7.
Though the shape of vibrating diaphragm group 2 is corresponding with the shape of shell 1 in the present embodiment, in different execution modes, can adopt multiple shape, vibrating diaphragm group 2 that size is different.The layer of conductive material (as chromium) that is coated with of vibrating diaphragm group 2 forms the conductivity live part, is commonly referred to movable electrode, and this movable electrode and pad 3 keep in touch.
Pad 3 is used to make vibrating diaphragm group 2 and other element electricity in the shell 1 to isolate.Pad 3 is made by electrical insulating material, has the thickness that equals spacing between vibrating diaphragm group 2 and the back pole plate 4.Pad 3 makes that vibrating diaphragm group 2 can be towards back pole plate 4 distortion.Pad 3 can have multiple shape, and needn't be corresponding with shell 1 shape, and can have multiple different size.In the present embodiment, pad 3 is and shell 1 corresponding square configuration.
Has the electrifying film (not shown) on the back pole plate 4.
Back-pole base 5 can be made multiple shape and size to adapt to the needs of application.
In the present embodiment, back-pole base 5 is made for rectangle and by electrical insulating material.
Connecting ring 6 is rectangular-shaped, and this connecting ring 6 also can take different shapes according to different performances and size.
The matching relationship of above-mentioned each element is as follows:
Electrifying film is set on the back pole plate 4 and is seated on the back-pole base 5, be electrically connected to connecting ring 6 simultaneously, like this, back pole plate 4 has just electrically connected with circuit board 7; Pad 3 is between back pole plate 4 and vibrating diaphragm group 2, in order to form the gap between back pole plate 4 and vibrating diaphragm group 2; Vibrating diaphragm group 2 places pad 3 times, and is housed in the shell 1 and electrically conducts with shell 1; Shell 1 is electrically connected on the corresponding circuits of circuit board.
Such matching relationship, make vibrating diaphragm group 2 be electrically connected to circuit board, back pole plate 4 also is electrically connected to circuit board, and still two circuit are because of directly conducting of the gap that forms between back pole plate 4 and the vibrating diaphragm group 2, and back pole plate 4 has just formed capacitance body with vibrating diaphragm group 2.
Have electrifying film on the back pole plate 4, electrifying film is a kind of dielectric that can keep the electric polarization state for a long time, and this dielectric is a kind of high molecular polymer, is distributed with free charge on the electrifying film.Owing to be distributed with free charge on the electrifying film, so between the two poles of the earth of the capacitor that forms between vibrating diaphragm group 2 and the back pole plate 4, the quantity of electric charge has just been arranged, when sound wave makes vibrating diaphragm group 2 vibration and when producing displacement, changed the capacitance of capacitor, the change of capacitance makes the output of capacitor produce corresponding alternating electric field, just formed the signal of telecommunication corresponding, so just finished the function of acoustic-electric conversion with acoustic signals.
The height of the back-pole base 5 of microphone will be lower than the height that adds up of connecting ring 6 and back pole plate 4 in the prior art, and promptly after the assembling, back-pole base 5 is lower than first plane 61 of connecting ring 6 slightly, and being beneficial to connecting ring 6 has good electrical contact with circuit board 7.The microphone that adopts this structure is when sealing, normally seal with sealing glue in microphone inside, because glue flows easily, sealing is too strong, can cause the back cavity of the inner operatic tunes of microphone to generate airtight cavity easily, increase the resistance of diaphragm group 2 vibrations, influenced the sensitivity of microphone.
So the microphone that the utility model provides adopts following method to make.
Back-pole base 5 is higher than the first surface 61 of connecting ring 6, and back-pole base 5 is made by the elastomeric material of high temperature resistant degree, when shell 1 seals, circuit board 7 is towards the direction extruding back-pole base 5 of back pole plate 4, direction finding is to shell 1 direction bulging behind back-pole base 5 pressurizeds, fill up the space between back-pole base 5 and the shell 1, form interference fit, thereby reach good sealing effectiveness; Vertical direction is shunk to the direction of back pole plate 4, exposes inner connecting ring 6, and promptly by after the extruding, back-pole base 5 is lower than first plane 61 of connecting ring 6 slightly, makes connecting ring 6 and circuit board 7 that good electrical contact be arranged.
Adopting said method to make in the process of microphone, the structure of back-pole base 5 as shown in Figure 2, back-pole base 5 is provided with a ventilating groove 51, the air in the back cavity of the inner operatic tunes of microphone is discharged the described operatic tunes by described ventilating groove.Ventilating groove 51 can adopt but be not limited to annular shape, also can adopt shapes such as rectangle.The angle of annular gas permeable groove be 180 spend to 270 the degree between.Certainly, ventilating groove 51 is not limited to 1, can have 2 or 3 or more, as long as can reach good sealing effectiveness, the sensitivity that improves microphone gets final product.
The back-pole base that has ventilating groove 51 5 that adopts the utility model to provide, the direction of microphone internal gas flow is shown in the direction of arrow among Fig. 3.As seen, adopted the structure of the microphone that the utility model provides after, guaranteed the air-tightness of microphone, also reduced the acoustic resistance of diaphragm group 2 vibrations, the sensitivity that has improved microphone.
Among the embodiment that the utility model provides, microphone and inner body thereof all are square, and in fact, the utility model is not limited only to square microphone, and the microphone of Any shape all is suitable for.
Protection range of the present utility model does not exceed with above-mentioned execution mode, as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection range of putting down in writing in claims.
Claims (3)
1, a kind of mini microphone, comprise shell, be contained in the circuit board that vibrating diaphragm group, the pad that links to each other with the vibrating diaphragm group, the back-pole base that links to each other with pad, the back pole plate that is contained in back-pole base and connecting ring in the shell and lid are connected to shell, it is characterized in that: shell is an interference fit with the back-pole base that is contained in it, back-pole base is provided with at least one ventilating groove, and the air in the back cavity of the inner operatic tunes of microphone is discharged the described operatic tunes by described ventilating groove.
2, mini microphone as claimed in claim 1 is characterized in that, described ventilating groove is the annular gas permeable groove.
3, mini microphone as claimed in claim 2 is characterized in that, the angle of described annular gas permeable groove be 180 spend to 270 the degree between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201465379U CN201274562Y (en) | 2008-08-08 | 2008-08-08 | Minimized microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201465379U CN201274562Y (en) | 2008-08-08 | 2008-08-08 | Minimized microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201274562Y true CN201274562Y (en) | 2009-07-15 |
Family
ID=40884900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201465379U Expired - Lifetime CN201274562Y (en) | 2008-08-08 | 2008-08-08 | Minimized microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201274562Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447985A (en) * | 2010-10-12 | 2012-05-09 | 宝星电子股份有限公司 | Microphone device |
-
2008
- 2008-08-08 CN CNU2008201465379U patent/CN201274562Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447985A (en) * | 2010-10-12 | 2012-05-09 | 宝星电子股份有限公司 | Microphone device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090715 |