CN202103844U - Electret condenser microphone - Google Patents
Electret condenser microphone Download PDFInfo
- Publication number
- CN202103844U CN202103844U CN2011201993634U CN201120199363U CN202103844U CN 202103844 U CN202103844 U CN 202103844U CN 2011201993634 U CN2011201993634 U CN 2011201993634U CN 201120199363 U CN201120199363 U CN 201120199363U CN 202103844 U CN202103844 U CN 202103844U
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- cavity
- circuit board
- condenser type
- ring
- type electret
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Abstract
The utility model discloses an electret condenser microphone. The condenser component of the electret condenser microphone includes a diaphragm component and a backplate cavity arranged sequentially corresponding to sound inlet holes of an outer casing; the backplate cavity includes a cavity integrally formed by a same conductive metal material and provided with an opening at one end, and the outer bottom surface and the outer side surface of the cavity are provided with an electret material layer. The cavity comprises a flat plate portion with sound holes; a ring body portion formed on one side edge of the plane where the flat plate is located, facing towards a circuit board and electrically connected with the circuit board; and a bulge portion formed on the other side edge of the plane where the flat plate is located, facing towards the diaphragm component and supported on the edge of the diaphragm component. The number of inner structure components is reduced, the volume of the inner cavity is relatively increased with the volume of the produce being decreased, the assembly efficiency is improved, and the aims of maintaining the performance stabilization of the electret condenser microphone and saving the production cost are reached.
Description
Technical field
The utility model relates to condenser type electret microphone technical field.
Background technology
The condenser type electret microphone of traditional structure; As shown in Figure 1, its primary structure is made up of shell 2, Air Filter 4, vibrating diaphragm assembly (diaphragm 51+ conduction is shaken and encircled 52), pad 7, back pole plate 8, metal grating ring 9, cavity ring 10, circuit board 1 (being fixed with electronic devices and components 3 on the circuit board 1) etc.Wherein, metal grating ring 9 is electrically connected back pole plate 8 and circuit board 1; Pad 7 makes between back pole plate 8 and the diaphragm 51 and keeps certain distance, for diaphragm 51 vibrations leave the space; Cavity ring 10 is arranged between metal grating ring 9 and the shell 2, plays insulation and supporting role.Its operation principle is: when sound waves is transmitted to the vibrating diaphragm assembly through the sound hole on the shell 2 21; Vibration through diaphragm 51; Change the distance of the plane-parallel capacitor that forms between diaphragm 51 and the back pole plate 8, make it to produce a current signal, be delivered to the transmission that circuit board 1 is realized signal through metal grating ring 9; Export after the processing of the conversion of the FET in the process electronic devices and components 3, Resistor-Capacitor Unit again, reach sound--the purpose of electricity conversion.
Current, along with the development of technology, because pressure of competition constantly raises; Market on the one hand to product demand to small-sized, miniature development; Thereby the volume requirement to product is more and more littler, causes condenser type electret microphone manufacturer to reduce the height and the diameter of finished product gradually, and the microphone inner structural members also reduces thereupon; Cause the microphone decreased performance, like degradation under the maximum sensitivity.Diameter is the product of height more than 1.5 millimeters more than 6 millimeters, and its internal capacity can be taken a fairly large number of part in, like the combination of back pole plate, metal grating ring, cavity ring, vibrating diaphragm; And along with the microminiaturization of product, its diameter reduces with height gradually, if adopt the Combination Design of original back pole plate, metal grating ring, cavity ring, vibrating diaphragm again; The difficulty of processing that makes parts is significantly raise; The microminiaturization of parts has strengthened assembly difficulty simultaneously, and it is bigger that production cost is raise; On the other hand, in the face of competitive pressure, market is more and more cheaper to the price request of product.The form that be to adapt to market, the condenser type electret microphone manufacturer microphone of different structure that released one after another, but do not eliminate the contradiction of performance, efficiency of assembling and the market price that microphone reduces to cause gradually.
Summary of the invention
The utility model technical problem to be solved is: overcome the problem that exists in the prior art; A kind of condenser type electret microphone of novel structure is provided; Reduced the quantity of its inner structural members; Under the situation that small product size reduces relative increase the volume of inner chamber; And the raising efficiency of assembling effectively solves the condenser type electret microphone and descends and expensive shortcoming owing to smaller volume causes properties of product, reaches and keeps the purpose that the stable performance of condenser type electret microphone saves production cost again.
For solving the problems of the technologies described above, the technical scheme of the utility model is: the condenser type electret microphone comprises:
External frame by circuit board and shell are enclosed is equipped with electronic devices and components on said circuit board, on said shell, be provided with sound hole;
Be installed on the capacitance component in the said external frame, wherein:
Said capacitance component comprises vibrating diaphragm assembly and the backplane chamber that corresponding said sound hole sets gradually;
Said backplane chamber comprises the cavity with the integrated end opening of same conductive metallic material, is provided with the electret layer at the outer bottom and the outer surface of said cavity, and said cavity comprises:
The flat part that has sound hole;
Take shape in the ring body portion of a lateral edges position on plane, said flat part place, said ring body portion is electrically connected towards said circuit board and with said circuit board;
Take shape in the lug boss of the opposite side marginal position on plane, said flat part place, said lug boss is towards said vibrating diaphragm assembly and be supported in the edge of said vibrating diaphragm assembly.
As a kind of optimized technical scheme, said conductive metallic material is an almag.
As a kind of optimized technical scheme, said cavity is cylindrical cavity or flat column cavity.
As a kind of optimized technical scheme, said lug boss is a ring-type.
As a kind of optimized technical scheme, said vibrating diaphragm assembly comprises diaphragm and the conduction that the is incorporated into said diaphragm one lateral edges ring that shakes.
As a kind of optimized technical scheme, on said shell, be provided with the Air Filter that covers sound hole.
After having adopted technique scheme; The beneficial effect of the utility model is: the condenser type electret microphone of the utility model; Its capacitance component comprises vibrating diaphragm assembly and the backplane chamber that corresponding sound hole sets gradually, and the backplane chamber comprises the cavity and the electret layer of being located at cavity outer bottom and outer surface with the integrated end opening of same conductive metallic material.The electret layer of cavity outer surface has substituted the insulation function of traditional structure cavity ring.In the cavity body structure, the back pole plate of the flat part replace traditional structural of band sound hole is used for store charge; The metal grating ring realization of ring body portion replace traditional structural and being electrically connected of circuit board; The pad of lug boss replace traditional structural is that diaphragm provides oscillation space.
In sum; The condenser type electret microphone of the utility model uses the parts in backplane chamber to substitute back pole plate of the prior art, metal grating ring, cavity ring and four parts of pad; And substitute the cavity ring with the electret layer; Above-mentioned structure has reduced to take up room, under the situation that the microphone volume reduces relative increase the volume of its inner chamber, guaranteed the stable of properties of product; Use the parts in backplane chamber, reduced by three parts, not only be easy to processing, and simplified assembly technology by a relatively large margin, improved efficiency of assembling, reduce production costs, for mechanization production provides strong assurance than traditional structure.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the structural representation of condenser type electret microphone in the prior art.
Fig. 2 is the structural representation of the utility model condenser type electret microphone.
Fig. 3 is the structural representation in backplane chamber in the utility model condenser type electret microphone.
Among the figure: 1. circuit board, 2. shell, 21. sound holes, 3. electronic devices and components, 4. Air Filter; 51. diaphragm, the 52. conduction rings that shake, 6. backplane chamber, 61. cavitys, 611. flat parts; 612. ring body portion, 613. lug bosses, 614. sound holes, 62. electret layers; 7. pad, 8. back pole plate, 9. metal grating ring, 10. cavity ring.
Embodiment
As shown in Figures 2 and 3, a kind of condenser type electret microphone, it comprises the external frame of being enclosed by circuit board 1 and shell 2.Electronic devices and components 3 are installed on circuit board 1, comprise FET and electric capacity etc., be used for signal is handled and carried out impedance conversion.Shell 2 adopts metal shell, on shell 2, is provided with sound hole 21, on shell 2, also is provided with the Air Filter 4 that covers sound hole 21.
Externally in the framework capacitance component is installed, capacitance component comprises vibrating diaphragm assembly and the backplane chamber 6 that corresponding sound hole 21 sets gradually.The vibrating diaphragm assembly comprises diaphragm 51 and the conduction that the is incorporated into diaphragm 51 1 lateral edges ring 52 that shakes, and shake ring 52 of conduction contact with shell 2, and diaphragm 51 is through conduction being electrically connected of ring 52 and shell 2 realizations and circuit board 1 of shaking.
The conductive metallic material that is used for process chamber 61 preferentially adopts almag.Following processing technology can be adopted in backplane chamber 6: adopt new technique to be coated with in a side of hard almag plate and be covered with the electret layer, through the punch forming of precision equipment die drawn.
Compare with prior art shown in Figure 1, the utility model is used backplane chamber 6, and the electret layer 62 of its cavity 61 outer surfaces has substituted the insulation function of traditional structure cavity ring 10.In cavity 61 structures, the back pole plate 8 of flat part 611 replace traditional structural is used for store charge; Metal grating ring 9 realizations of ring body portion 612 replace traditional structural and being electrically connected of circuit board 1; The pad 7 of lug boss 613 replace traditional structural provides oscillation space for diaphragm 51.In sum; The utility model uses the parts in backplane chamber to substitute back pole plate of the prior art, metal grating ring, cavity ring and four parts of pad; And substitute the cavity ring with the electret layer; Above-mentioned structure has reduced to take up room, under the situation that the microphone volume reduces relative increase the volume of its inner chamber, guaranteed the stable of properties of product; Use the parts in backplane chamber, reduced by three parts, not only be easy to processing, and simplified assembly technology by a relatively large margin, improved efficiency of assembling, reduce production costs, for mechanization production provides strong assurance than traditional structure.
Claims (7)
1. condenser type electret microphone comprises:
External frame by circuit board and shell are enclosed is equipped with electronic devices and components on said circuit board, on said shell, be provided with sound hole;
Be installed on the capacitance component in the said external frame, it is characterized in that:
Said capacitance component comprises vibrating diaphragm assembly and the backplane chamber that corresponding said sound hole sets gradually;
Said backplane chamber comprises the cavity with the integrated end opening of same conductive metallic material, is provided with the electret layer at the outer bottom and the outer surface of said cavity, and said cavity comprises:
The flat part that has sound hole;
Take shape in the ring body portion of a lateral edges position on plane, said flat part place, said ring body portion is electrically connected towards said circuit board and with said circuit board;
Take shape in the lug boss of the opposite side marginal position on plane, said flat part place, said lug boss is towards said vibrating diaphragm assembly and be supported in the edge of said vibrating diaphragm assembly.
2. condenser type electret microphone as claimed in claim 1 is characterized in that: said conductive metallic material is an almag.
3. condenser type electret microphone as claimed in claim 1 is characterized in that: said cavity is cylindrical cavity or flat column cavity.
4. like claim 1,2 or 3 described condenser type electret microphones, it is characterized in that: said lug boss is a ring-type.
5. like claim 1,2 or 3 described condenser type electret microphones, it is characterized in that: said lug boss is several boss.
6. condenser type electret microphone as claimed in claim 1 is characterized in that: said vibrating diaphragm assembly comprises diaphragm and the conduction that the is incorporated into said diaphragm one lateral edges ring that shakes.
7. condenser type electret microphone as claimed in claim 6 is characterized in that: on said shell, be provided with the Air Filter that covers sound hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201993634U CN202103844U (en) | 2011-06-14 | 2011-06-14 | Electret condenser microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201993634U CN202103844U (en) | 2011-06-14 | 2011-06-14 | Electret condenser microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202103844U true CN202103844U (en) | 2012-01-04 |
Family
ID=45389841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201993634U Expired - Fee Related CN202103844U (en) | 2011-06-14 | 2011-06-14 | Electret condenser microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202103844U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645502A (en) * | 2018-04-28 | 2018-10-12 | 北京遥测技术研究所 | A kind of aerospace craft noise testing Electret sound sensor |
| CN110418227A (en) * | 2019-07-08 | 2019-11-05 | 东莞市乐友电声科技有限公司 | The mounting device of microphone assembly and novel microphone assembly |
-
2011
- 2011-06-14 CN CN2011201993634U patent/CN202103844U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645502A (en) * | 2018-04-28 | 2018-10-12 | 北京遥测技术研究所 | A kind of aerospace craft noise testing Electret sound sensor |
| CN108645502B (en) * | 2018-04-28 | 2020-08-14 | 北京遥测技术研究所 | Electret noise sensor for measuring noise of aerospace vehicle |
| CN110418227A (en) * | 2019-07-08 | 2019-11-05 | 东莞市乐友电声科技有限公司 | The mounting device of microphone assembly and novel microphone assembly |
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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: 20120104 Termination date: 20140614 |
|
| EXPY | Termination of patent right or utility model |