CN201781615U - Electret microphone - Google Patents
Electret microphone Download PDFInfo
- Publication number
- CN201781615U CN201781615U CN2010205299229U CN201020529922U CN201781615U CN 201781615 U CN201781615 U CN 201781615U CN 2010205299229 U CN2010205299229 U CN 2010205299229U CN 201020529922 U CN201020529922 U CN 201020529922U CN 201781615 U CN201781615 U CN 201781615U
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- CN
- China
- Prior art keywords
- diaphragm
- microphone
- vibrating diaphragm
- circuit board
- pole plate
- 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 an electret microphone, which comprises a housing, a circuit board accommodated in the housing, a back plate electrically connected with the circuit board, a vibrating diaphragm adjacent to the back plate and a gasket for performing electrical isolation between the vibrating diaphragm and the back plate, wherein the vibrating diaphragm comprises a diaphragm stretching ring, a stretched diaphragm adhered to one surface of the diaphragm stretching ring and a partition board adhered to the other surface of the diaphragm stretching ring and provided with a through hole. The utility model has the advantage that good waterproof, dustproof, moisture resistant and high temperature resistant functions can be realized by virtue of the combined action of the partition board and the housing.
Description
[technical field]
The utility model relates to a kind of microphone field, relates in particular to a kind of electret microphone.
[background technology]
Along with the development of wireless communication technique, microphone has become requisite device in the increasing electronic product, for example: mobile phone, notebook computer, multimedia player etc.People not only are speech quality to the requirement of microphone, also require it convenient aspect manufacturing process and mounting technology, can satisfy the requirement of most of people to mount technology.Microphone commonly used at present mainly contains electret microphone and MEMS (Micro-Electro-Mechanical-Systems, microelectromechanical-systems) microphone, and electret microphone is used by people comparatively widely because of it is with low cost.
As shown in Figure 1, be a kind of three-dimensional exploded view of the electret microphone 100 ' relevant with the utility model.Electret microphone 100 ' comprises circuit board 10 ', connecting ring 11 ', back pole plate 12 ', back-pole base 13 ', pad 14 ', vibrating diaphragm 15 ', reaches shell 16 ', and described vibrating diaphragm 15 ' comprises the diaphragm 151 ' and the zona 152 ' that stretches tight.Prior art microphone 100 ' sound directly enters into vibrating diaphragm 15 ' from the sound hole 162 ' of shell 16 ', cause waterproof moisture-resistant gas poor effect, and microphone 100 ' during through the SMT Reflow Soldering high temperature air easily microphone 100 ' inner body is caused damage, in use introduced contaminants enters into microphone inside easily microphone 100 ' is caused damage.
Therefore, be necessary the deficiency of above-mentioned electret microphone is improved.
[summary of the invention]
The purpose of this utility model is to solve above-mentioned electret microphone waterproof moisture-resistant gas poor effect, high temperature air causes damage to the microphone inner body easily when microphone process SMT Reflow Soldering, and in use introduced contaminants enters into microphone inside easily to the hurtful deficiency of microphone.
A kind of electret microphone is provided for achieving the above object:
A kind of electret microphone, the back pole plate that comprises shell, is contained in circuit board in the described shell, electrically connects with described circuit board, the vibrating diaphragm of contiguous described back pole plate, be used as the pad that carries out electrical isolation between described vibrating diaphragm and the back pole plate, described vibrating diaphragm comprises stretch tight zona and the diaphragm that is sticked and simultaneously is tauted at the zona that stretches tight, and it also comprises being sticked and has the dividing plate of through hole at the zona another side that stretches tight.
Preferably, described through hole forms circular array in position, dividing plate center.
Preferably, described through hole is shaped as circular aperture.
The beneficial effects of the utility model are: high temperature air was to the infringement of microphone inner body when described dividing plate and shell acting in conjunction can reduce microphone through the SMT Reflow Soldering; can form waterproofing protection; make microphone have water-proof function; can improve the moisture-resistant gas ability of microphone; promote the reliability of microphone, can prevent microphone in use introduced contaminants enter into of the infringement of microphone inside to microphone.
[description of drawings]
Fig. 1 is the three-dimensional exploded view that the utility model electret microphone closes on the technology electret microphone;
Fig. 2 is the three-dimensional exploded view of the utility model electret microphone.
[embodiment]
As shown in Figure 2, the electret microphone 100 that the utility model provides, is used as the pad 14 that carries out electrical isolation between described vibrating diaphragm 15 and the back pole plate 12 at circuit board 10, the connecting ring 11 that is connected with described circuit board 10, the back pole plate 12 that utilizes described connecting ring 11 electrical connecting circuit plates 10, the back-pole base 13 of accommodating described connecting ring 11 and back pole plate 12, the vibrating diaphragm 15 that is close to described back pole plate 12 that comprises shell 16, is contained in the described shell 16 and electrically connects with shell 16.
Described vibrating diaphragm 15 comprises the zona 152 and being sticked at the diaphragm 151 of zona 152 one sides that stretches tight of stretching tight, and described vibrating diaphragm 15 also comprises and being sticked at the dividing plate 153 of zona 152 another sides that stretches tight.Have through hole 1531 on the described dividing plate 153, through hole 1531 forms circular array in dividing plate 153 centers, and described through hole 1531 is a circular aperture.
Described shell 16 comprises sidewall 163, diapire 161 and is located at sound hole 162 on the diapire 161 that described sound hole 162 also can be located on the sidewall 163.External voice enters by described sound hole 162, then pass to diaphragm 151 by the through hole on the dividing plate 153 1531, diaphragm 151 shakes under the acoustic pressure effect, thereby change the gap between diaphragm 151 and the back pole plate 12, thereby change the direct capacitance between diaphragm 151 and the back pole plate 12, realize that the signal of telecommunication changes with sound wave.
Described circuit board 10 electrically connects with shell 16, and described circuit board 10 contacts with connecting ring 11, and described circuit board 10 electrically connects by connecting ring 11 and back pole plate 12, and transmission of electric signals.
Described connecting ring 11 is made by electric conducting material, makes annular with the shape of circuit board 10 in the utility model.
Have electret on the described back pole plate 12, electret 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 electret.Owing to divide on the electret free charge do not arranged, so between the two poles of the earth that form capacitor between diaphragm 151 and the back pole plate 12, the quantity of electric charge has just been arranged, when sound wave makes diaphragm 151 vibrations 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.
Described back-pole base 13 is accommodated described back pole plate 12 and connecting ring 11, and back pole plate 13 can support multiple shape and size, and adapting to the needs of application, back-pole base 13 of the present utility model is made for drum and by electrical insulating material such as plastics, rubber, silica gel etc.
Described pad 14 is made by electrical insulating material, is used for forming the gap between diaphragm 151 and the back pole plate 12, and makes the two electrical isolation, pad 14 can make multiple shape but be annular in the utility model.
Above-described only is better embodiment of the present utility model; should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; can also make improvement, but these all belong to protection range of the present utility model.
Claims (3)
1. electret microphone, the back pole plate that comprises shell, is contained in circuit board in the described shell, electrically connects with described circuit board, the vibrating diaphragm of contiguous described back pole plate, be used as the pad that carries out electrical isolation between described vibrating diaphragm and the back pole plate, it is characterized in that: described vibrating diaphragm comprises stretch tight zona and the diaphragm that is sticked and simultaneously is tauted at the zona that stretches tight, and it also comprises being sticked and has the dividing plate of through hole at the zona another side that stretches tight.
2. according to the described electret microphone of claim 1, it is characterized in that: described through hole forms circular array in position, dividing plate center.
3. according to claim 1 or 2 described electret microphones, it is characterized in that: described through hole be shaped as circular aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205299229U CN201781615U (en) | 2010-09-15 | 2010-09-15 | Electret microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205299229U CN201781615U (en) | 2010-09-15 | 2010-09-15 | Electret microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781615U true CN201781615U (en) | 2011-03-30 |
Family
ID=43794813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205299229U Expired - Lifetime CN201781615U (en) | 2010-09-15 | 2010-09-15 | Electret microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201781615U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113793A (en) * | 2014-07-18 | 2014-10-22 | 瑞声声学科技(深圳)有限公司 | Microphone encapsulation method |
| CN109743670A (en) * | 2018-12-27 | 2019-05-10 | 深圳市新厚泰塑胶电子有限公司 | A kind of design method controlling ECM initial phase |
-
2010
- 2010-09-15 CN CN2010205299229U patent/CN201781615U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113793A (en) * | 2014-07-18 | 2014-10-22 | 瑞声声学科技(深圳)有限公司 | Microphone encapsulation method |
| CN109743670A (en) * | 2018-12-27 | 2019-05-10 | 深圳市新厚泰塑胶电子有限公司 | A kind of design method controlling ECM initial phase |
| CN109743670B (en) * | 2018-12-27 | 2021-03-23 | 深圳市新厚泰塑胶电子有限公司 | Design method for controlling initial phase of ECM |
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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: 20170406 Address after: Singapore Ang Mo Kio 65 Street No. 10 techpoint Building 1 floor, No. 8 Patentee after: AAC Technologies (Singapore) Co., Ltd. Patentee after: Shenzhen Meiou Electronics Co., Ltd. Address before: 518057 Nanshan District province high tech Industrial Park, Shenzhen, North West New Road, No. 18 Patentee before: Shenzhen Meiou Electronics Co., Ltd. Patentee before: AAC Acoustic Technologies (Shenzhen) Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110330 |
|
| CX01 | Expiry of patent term |