CN202135310U - Back pole body used for capacitive electret microphone - Google Patents
Back pole body used for capacitive electret microphone Download PDFInfo
- Publication number
- CN202135310U CN202135310U CN201120247658U CN201120247658U CN202135310U CN 202135310 U CN202135310 U CN 202135310U CN 201120247658 U CN201120247658 U CN 201120247658U CN 201120247658 U CN201120247658 U CN 201120247658U CN 202135310 U CN202135310 U CN 202135310U
- Authority
- CN
- China
- Prior art keywords
- cavity
- electret microphone
- ring
- back pole
- condenser type
- 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 - Fee Related
Links
Images
Abstract
The utility model discloses a back pole body used for a capacitive electret microphone, which is characterized by comprising a cavity with an opening at one end, wherein the cavity is prepared by the same conductive metal material and is integrated into one body, an outer bottom and an outer side surface of the cavity are respectively provided with an electret material layer, and the cavity comprises a flat portion provided with a sound hole and a ring body portion formed at a side edge of the plane where the flat portion is located. The back pole body of the utility model can replace a back pole plate, a metal gate ring and a cavity ring of the prior art, the problem that performance of the capacitive electret microphone is reduced and cost is high due to a smaller volume, and the purpose that performance of the capacitive electret microphone is stable, and production cost is saved is realized.
Description
Technical field
The utility model relates to condenser type electret microphone technical field, is specifically related to the structural member that a kind of condenser type electret microphone is used.
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; Provide a kind of condenser type electret microphone to use the backplane body; Substitute back pole plate of the prior art, metal grating ring and four parts of cavity ring; Effectively solve the condenser type electret microphone and descend and expensive shortcoming, reach and keep the purpose that the stable performance of condenser type electret microphone saves production cost again owing to smaller volume causes properties of product.
For solving the problems of the technologies described above; The technical scheme of the utility model is: the condenser type electret microphone is used the backplane body; Comprise the cavity with the integrated end opening of same conductive metallic material, be provided with the electret layer at the outer bottom and the outer surface of said cavity, 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.
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.
After having adopted technique scheme; The beneficial effect of the utility model is: the condenser type electret microphone of the utility model is used the backplane body, and it comprises 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 insulation function of the electret layer replace traditional structural cavity ring of cavity outer surface.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 microphone circuit plate.
In sum; The utility model uses parts of backplane body to substitute back pole plate of the prior art, metal grating ring and three parts of cavity ring; 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 parts of backplane body, reduced by two 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 backplane body.
Fig. 3 is a structural representation of using the condenser type electret microphone of the utility model backplane body.
Among the figure: 1. circuit board, 2. shell, 21. sound holes, 3. electronic devices and components, 4. Air Filter, 51. diaphragms; 52. the conduction ring that shakes, 6. backplane body, 61. cavitys, 611. flat parts, 612. ring body portions, 613. sound holes; 62. electret layer, 7. pad, 8. back pole plate, 9. metal grating ring, 10. cavity ring.
Embodiment
As shown in Figure 2, a kind of condenser type electret microphone is with backplane body 6, and it comprises the cavity 61 with the integrated end opening of same conductive metallic material, is provided with electret layer 62 at the outer bottom and the outer surface of cavity 61.Cavity 61 can be a cylindrical cavity, can be the flat column cavity also, specifically comprises: the flat part 611 that has sound hole; Take shape in the ring body portion 612 of a lateral edges position on plane, flat part 611 place.The conductive metallic material that is used for process chamber 61 can adopt the copper product of traditional back pole plate use; In this implementation process; The preferential almag that adopts, almag have advantages such as the hard amount of matter is light, density is low, thermal diffusivity is better, crushing resistance is stronger, compare with using copper product; Cavity 61 uses almag processing, greatly reduces production cost.Backplane body 6 can adopt following processing technology: 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.
As shown in Figure 3, backplane body 6 is applied in the condenser type electret microphone.The condenser type electret microphone 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 body 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 ring body portion 612 of backplane body 6 is electrically connected towards circuit board 1 and with circuit board 1, is provided with pad 7 between the flat part 611 of backplane body 6 and the diaphragm 51 and for the vibration of diaphragm 51 space is provided.
Compare with prior art shown in Figure 1, the utility model is used backplane body 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.In sum; The utility model uses parts of backplane body to substitute back pole plate of the prior art, metal grating ring and three parts of cavity ring; 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 parts of backplane body, reduced by two 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 (4)
1. the condenser type electret microphone is used the backplane body, it is characterized in that, 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.
2. condenser type electret microphone as claimed in claim 1 is used the backplane body, it is characterized in that: said conductive metallic material is an almag.
3. condenser type electret microphone as claimed in claim 1 is used the backplane body, it is characterized in that: said conductive metallic material is a copper.
4. condenser type electret microphone as claimed in claim 1 is used the backplane body, it is characterized in that: said cavity is cylindrical cavity or flat column cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120247658U CN202135310U (en) | 2011-07-14 | 2011-07-14 | Back pole body used for capacitive electret microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120247658U CN202135310U (en) | 2011-07-14 | 2011-07-14 | Back pole body used for capacitive electret microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202135310U true CN202135310U (en) | 2012-02-01 |
Family
ID=45524066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120247658U Expired - Fee Related CN202135310U (en) | 2011-07-14 | 2011-07-14 | Back pole body used for capacitive electret microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202135310U (en) |
-
2011
- 2011-07-14 CN CN201120247658U patent/CN202135310U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9271435B2 (en) | Miniature microphone, protection frame thereof and method for manufacturing the same | |
| CN102075838B (en) | Electret microphone | |
| CN201210744Y (en) | Miniature capacitor type microphone | |
| CN202395984U (en) | Capacitance type electret microphone | |
| CN202103844U (en) | Electret condenser microphone | |
| CN102075841B (en) | Electret microphone | |
| CN202135316U (en) | Miniature condenser microphone | |
| CN202103843U (en) | Back pole cavity for capacitive electret microphone | |
| CN202395980U (en) | Capacitive electret microphone | |
| CN202135310U (en) | Back pole body used for capacitive electret microphone | |
| CN201294630Y (en) | Anti-interference capacitance microphone | |
| CN201418146Y (en) | Miniature capacitive type microphone | |
| CN202587315U (en) | Microphone | |
| CN202059572U (en) | An electret capacitor microphone | |
| CN201869360U (en) | Capacitance type microphone | |
| CN101257737B (en) | Miniature capacitance type microphone | |
| CN201167414Y (en) | Miniature capacitance microphone | |
| CN203590459U (en) | Omni-directional microphone | |
| CN209046869U (en) | A kind of miniature planar vibrating membrane loudspeaker | |
| CN219780383U (en) | Condenser microphone pole head | |
| CN102158786A (en) | Electret condenser microphone | |
| CN2854992Y (en) | Mini-electret capacitor microphone | |
| CN202068568U (en) | Electret capacitor microphone | |
| CN202406289U (en) | Electret capacitor microphone for digital products | |
| CN202395981U (en) | Electret capacitor microphone for mobile phone |
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: 20120201 Termination date: 20150714 |
|
| EXPY | Termination of patent right or utility model |