CN201042076Y - Capacitance type microphone - Google Patents
Capacitance type microphone Download PDFInfo
- Publication number
- CN201042076Y CN201042076Y CNU2007200213408U CN200720021340U CN201042076Y CN 201042076 Y CN201042076 Y CN 201042076Y CN U2007200213408 U CNU2007200213408 U CN U2007200213408U CN 200720021340 U CN200720021340 U CN 200720021340U CN 201042076 Y CN201042076 Y CN 201042076Y
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- China
- Prior art keywords
- pole plate
- shell
- wiring board
- positioning convex
- back pole
- 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
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The utility model discloses a capacitive microphone. A first positioning projection that can position a circuit board along the axial direction of an outer shell is arranged on the inner lateral wall of the upper port of an outer shell. A second positioning projection that can position a back polar plate, an insulating spacer and a diaphragm along the axial direction of the outer shell is arranged on the inner lateral wall of the lower port of the outer shell. The circuit board is mounted at the first positioning projection, while the back polar plate, an insulating spacer and a diaphragm are mounted at the second positioning projection, wherein, the contact part between the back polar plate and the outer shell is provided with an electric insulating device. Compared with common products, the utility model gets rid of the grating ring and the insulating ring so as to relatively increase the volume of the inner cavity on the condition that the product volume is reduced, reduce the parasitic capacitance, guarantee the stabilization of the product performance, but also simplify the assembling technology, increase the assembling efficiency and reduce the manufacturing cost.
Description
Technical field
The utility model relates to a kind of Electret Condencer Microphone, is a kind of miniature capacitance type microphone specifically.
Background technology
As shown in Figure 9, common Electret Condencer Microphone, its structure mainly comprises shell 1, wiring board 2, be installed in the electronic devices and components 3 on the described wiring board 2, grating ring 112, the dead ring 111 of grating ring 112 and housing, back pole plate 6, pad 9, vibrating diaphragm 5 (ring 52+ film 51 shakes) adopts grating ring 112 to connect back pole plate 6 and wiring board 2, realize the connection of circuit, shell 1 is by the edge sealing technology or with conducting resinl bonding technology connection line plate 2.
Fig. 9 is a kind of Electret Condencer Microphone that the conducting resinl bonding technology connects shell 1 and wiring board 2 of using.Its operation principle is: when sound acts on the vibrating diaphragm 5, vibration by vibrating diaphragm 5, change the distance of the plane-parallel capacitor that forms between vibrating diaphragm 5 and the back pole plate 6, produce a current signal, be delivered to the transmission that wiring board 2 is realized signal by grating ring 112, reach the purpose of sound-electricity conversion.Current, development along with technology, market to the demand of product towards miniaturization, even microminiaturized development, thereby, more and more littler to the small product size requirement, cause Electret Condencer Microphone manufacturer to reduce the diameter and the height of finished product gradually, the decreased performance that causes microphone reduces or signal to noise ratio reduces etc. as limiting snesibility.Present product, because the advantage on portion's volume within it, its inside can take a fairly large number of parts in, as the dead ring 111 of grating ring 112 with housing, grating ring 112, back pole plate 6 etc.And along with the development of the miniaturization of products, its diameter reduces gradually, come deisgn product if adopt the grating ring structure again, not only aspect the processing of parts, increase difficulty, can promote production cost simultaneously, the most important thing is because the grating ring structure takies bigger ratio space in the internal capacity of less microphone, cause the microphone inner space to reduce, and the influence that the parasitic capacitance between grating ring and the shell causes is also increasing, thereby the decreased performance that finally causes microphone is as sensitivity reduction of microphone etc.For adapting to the demand of market to the miniaturization of products, the SONION company of Denmark has released a kind of miniature capacitance type microphone, the patent No. is EP 1 251 713 A2, the shortcoming that the space that reduces to bring of volume reduces though its product can be good at solving, but its structure that adopts comes with some shortcomings, as its complex-shaped back pole plate, processing and making be difficulty all.Secondly, in assembling process, in order to realize the connection of circuit, back pole plate needs accurate localization, perhaps is coated with the method for conductive adhesive, just can accurate firm being connected with the contact point on the wiring board.So both cause the reduction of efficiency of assembling, and can increase product cost again.
The utility model content
Technical problem to be solved in the utility model provides and a kind ofly is applicable to that automation assembling, inner space are big, superior performance, Electret Condencer Microphone with low cost.
For solving the problems of the technologies described above, the technical solution of the utility model is: Electret Condencer Microphone, comprise a tubular metal shell, the upper end of described metal shell is equipped with the wiring board of the upper end open of the described metal shell of sealing, on the described wiring board electronic devices and components are installed, the lower end of described metal shell is equipped with default sound hole and seals the bottom of described metal shell lower ending opening, described metal shell, wiring board and bottom form a cavity, side near bottom in the described cavity is equipped with vibrating diaphragm and back pole plate, be provided with insulation spacer in the middle of vibrating diaphragm and the back pole plate, be provided with the metallic conduction spare that is electrically connected the two between described back pole plate and the wiring board, metallic conduction spare and described shell mutually insulated, wherein:
The madial wall at described shell upper port place is provided with first positioning convex of described wiring board along described shell axial location, the madial wall at described shell lower port place is provided with described back pole plate, insulation spacer and vibrating diaphragm second positioning convex along described shell axial location, described wiring board is installed at the described first positioning convex place, described back pole plate, insulation spacer and vibrating diaphragm are installed by the described second positioning convex place, and the contact site of described back pole plate and described shell is provided with electric insulation arrangement.
As a kind of improvement, described first positioning convex and described second positioning convex are the ring-type positioning convex.
As a kind of improvement, described first positioning convex and described second positioning convex are the intermittent bosses of annular distribution.
As a kind of improvement, described metallic conduction spare is a power spring, and an end of described power spring is fixed on wiring board or the back pole plate, and the free end of described power spring is supported on the corresponding back pole plate or wiring board.
As a kind of improvement, described metallic conduction spare is an elastic sheet metal, and an end of described elastic sheet metal is fixed on wiring board or the back pole plate, and the free end of described elastic sheet metal is supported on the corresponding back pole plate or wiring board.
As a kind of improvement, described electric insulation arrangement is the insulation enamelled coating that is coated in the position that contacts on the described outer casing inner wall and with pole plate, perhaps is coated in the insulation enamelled coating at the position that contacts on the described pole plate and with described outer casing inner wall.
As a kind of improvement, described electric insulation arrangement is the insulation spacer that is installed between described outer casing inner wall and the pole plate.
As a kind of improvement, there is the elongated sound channel of extending laterally in the outside, sound hole on the described bottom.
As a kind of improvement, a conduction Air Filter is arranged between described bottom and the described vibrating diaphragm.
As a kind of further improvement, described conduction Air Filter is to be coated with the nonmetal net that is coated with conductive layer, or metal establishment net, or is provided with the sheet metal of aperture.
Owing to adopted technique scheme, the madial wall at described shell upper port place is provided with first positioning convex of described wiring board along described shell axial location, the madial wall at described shell lower port place is provided with described back pole plate, insulation spacer and vibrating diaphragm second positioning convex along described shell axial location, described wiring board is installed at the described first positioning convex place, described back pole plate, insulation spacer and vibrating diaphragm are installed by the described second positioning convex place, and the contact site of described back pole plate and described shell is provided with electric insulation arrangement; The contrast conventional products has removed grating ring and dead ring, has effectively solved the volume that has relatively increased inner chamber on the basis that small product size reduces, and has reduced parasitic capacitance, guaranteed the stable of properties of product, simplify assembly technology simultaneously, improved efficiency of assembling, reduced production cost again.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the structural representation of the utility model embodiment one housing;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the structural representation of the another kind of housing of the utility model embodiment one;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the structural representation of the utility model embodiment two;
Fig. 7 is the structural representation of the utility model embodiment three;
Fig. 8 is the another kind of structural representation that the utility model metal bottom cover combines with housing;
Fig. 9 is the structural representation of background technology.
Embodiment
Embodiment one: as Fig. 1, Fig. 2 and shown in Figure 3, the Electret Condencer Microphone that present embodiment provides is columniform, comprise a tubular metal shell 1, the upper end 12 of tubular metal shell 1 is by wiring board 2 sealings of installing electronic devices and components 3 such as FET in advance, and shell 1 can link together by mode such as conducting resinl and wiring board 2; The lower end 13 of metal shell 1 is by metal bottom cover 4 sealings in a default sound hole 41, and metal shell 1 also can link together by mode such as conducting resinl and bottom 4; Wiring board 2, shell 1 and cavity of bottom 4 common formation; Side near metal bottom cover 4 in the cavity is equipped with the ring 52 that shakes; Shaking is bonded with diaphragm 51 above the ring 52, and shake ring 52 and diaphragm 51 bond together and constitute a vibrating diaphragm 5, and back pole plate 6 is installed above the diaphragm 51; Isolated by one deck insulation spacer 9 in the middle of diaphragm 51 and the back pole plate 6; Pole plate 6 and wiring board 2 are communicated with and electric connection, metallic conduction spare 8 and described shell 1 mutually insulated by a metallic conduction spare 8 machineries.The madial wall at described shell 1 upper port place is provided with the first positioning convex 11a of described wiring board 2 along described shell 1 axial location, the madial wall at described shell 1 lower port place is provided with described back pole plate 6, insulation spacer 9 and the vibrating diaphragm 5 second positioning convex 11b along described shell 1 axial location, described wiring board 2 is installed at the described first positioning convex 11a place, described back pole plate 6, insulation spacer 9 and vibrating diaphragm 5 are installed by the described second positioning convex 11b place, and the contact site of described back pole plate 6 and described shell 1 is provided with electric insulation arrangement 7.
In the implementation case, described first positioning convex 11a and the described second positioning convex 11b are the ring-type positioning convex.Certainly, common engineers and technicians as the present technique field, also can draw the technological means shown in accompanying drawing 4 and accompanying drawing 5, promptly described first positioning convex 11a and the described second positioning convex 11b are the intermittent bosses of annular distribution, and have same technique effect.
In the implementation case, there is a layer insulating 7 contact site of pole plate 6 and shell 1 to prevent short circuit.Described electric insulation arrangement 7 is for being coated in the insulation enamelled coating at the position that contacts on described shell 1 inwall and with pole plate, perhaps be coated in the insulation enamelled coating at the position that contacts on the described pole plate and with described shell 1 inwall, perhaps described electric insulation arrangement 7 is for being installed in the insulation spacer between described shell 1 inwall and the pole plate, above technological means can both play insulating effect, and exceeds the shared volume of increase.
In the implementation case, described metallic conduction spare 8 is a power spring, and an end of described power spring is fixed on the wiring board 2, and the free end of described power spring is supported on the corresponding back pole plate 6.Equally, described metallic conduction spare 8 also can adopt elastic sheet metal, and an end of described elastic sheet metal is fixed on the wiring board 2, and the free end of described elastic sheet metal is supported on the corresponding back pole plate 6.Power spring or elastic sheet metal can play the conduction interconnect function, do not increase the volume of shared inner chamber, and owing to have certain elasticity, can be good at keeping the circuit connective stability and the mechanical structure stability of internal structure.
Embodiment two: the implementation case is improved on the basis of case study on implementation 1, as shown in Figure 6, extend to the outside of cavity in sound hole 41 on the metal bottom cover 4, form an elongated sound channel 42, use this structure, with making that the installation site of microphone is more flexible, can adapt in the more products structure, and have acoustical behavior preferably.
Embodiment three: the implementation case is improved on the basis of case study on implementation 1 and case study on implementation 2, as shown in Figure 7, the implementation case has added conduction Air Filter 10 at the bottom 4 and the ring that shakes between 52, conduction Air Filter 10 can play dustproof effect, the conduction Air Filter can be that the plating of nonmetallic materials net is coated with conductive layer, can be the wire netting that wire is worked out, also can be that sheet metal is made the wire netting that a plurality of apertures form by multiple modes such as etching process, Sheet Metal Forming Technologies.Adopt this structure can solve the shortcoming that is difficult to add dust proof member in the case study on implementation 2, can automated production, and little hole number that can be by regulating wire netting and diameter are regulated dustproof, water-proof function effect and sound effect.
The shell of microphone provided by the utility model is columnar or square tube shape; Simultaneously, in the combination of metal shell and wiring board, metal bottom cover, wiring board can be bonded in the sidewall above the metal shell projection, and metal bottom cover can be bonded on the madial wall below the metal shell projection, also can be bonded on the bottom surface of metal shell.Fig. 8 has then embodied wiring board and has been bonded in the sidewall above the metal shell projection, and metal bottom cover is bonded in the structure principle chart on the madial wall below the metal shell projection.At columnar product structure, also can finish the sealing of shell and wiring board, metal bottom cover by the mode of edge sealing shell.
All adopted the structure of full directional microphone in the cited case of the utility model, in fact, also similar structures can be applied in two point to or uni-directional microphone in and do not violate the purport of this patent, the adjustment mode is a technique known in the industry, is not giving unnecessary details at this.
Claims (10)
1. Electret Condencer Microphone, comprise a tubular metal shell (1), the upper end of described metal shell (1) is equipped with the wiring board (2) of the upper end open of the described metal shell of sealing (1), electronic devices and components (3) are installed on the described wiring board (2), the lower end of described metal shell (1) is equipped with default sound hole (41) and seals the bottom (4) of described metal shell (1) lower ending opening, described metal shell (1), wiring board (2) and bottom (4) form a cavity, side near bottom (4) in the described cavity is equipped with vibrating diaphragm (5) and back pole plate (6), be provided with insulation spacer (9) in the middle of vibrating diaphragm (5) and the back pole plate (6), be provided with the metallic conduction spare (8) that is electrically connected the two between described back pole plate (6) and the wiring board (2), metallic conduction spare (8) and described shell (1) mutually insulated is characterized in that:
The madial wall at described shell (1) upper port place is provided with first positioning convex (11a) of described wiring board (2) along described shell (1) axial location, the madial wall at described shell (1) lower port place is provided with described back pole plate (6), insulation spacer (9) and vibrating diaphragm (5) are along second positioning convex (11b) of described shell (1) axial location, described first positioning convex (11a) locates to install described wiring board (2), described second positioning convex (11b) locates to install described back pole plate (6), insulation spacer (9) and vibrating diaphragm (5), the contact site of described back pole plate (66) and described shell (1) is provided with electric insulation arrangement (7).
2. Electret Condencer Microphone as claimed in claim 1 is characterized in that: described first positioning convex (11a) and described second positioning convex (11b) are the ring-type positioning convex.
3. Electret Condencer Microphone as claimed in claim 1 is characterized in that: described first positioning convex (11a) and described second positioning convex (11b) are the intermittent bosses of annular distribution.
4. Electret Condencer Microphone as claimed in claim 1, it is characterized in that: described metallic conduction spare (8) is a power spring, one end of described power spring is fixed on wiring board (2) or the back pole plate (6), and the free end of described power spring is supported on the corresponding back pole plate (6) or wiring board (2).
5. Electret Condencer Microphone as claimed in claim 1, it is characterized in that: described metallic conduction spare (8) is an elastic sheet metal, one end of described elastic sheet metal is fixed on wiring board (2) or the back pole plate (6), and the free end of described elastic sheet metal is supported on the corresponding back pole plate (6) or wiring board (2).
6. Electret Condencer Microphone as claimed in claim 1, it is characterized in that: described electric insulation arrangement (7) is for being coated in the insulation enamelled coating at the position that contacts on described shell (1) inwall and with pole plate, perhaps is coated in the insulation enamelled coating at the position that contacts on the described pole plate and with described shell (1) inwall.
7. Electret Condencer Microphone as claimed in claim 1 is characterized in that: described electric insulation arrangement (7) is for being installed in the insulation spacer between described shell (1) inwall and the pole plate.
8. Electret Condencer Microphone as claimed in claim 1 is characterized in that: described bottom (4) is gone up the outside, sound hole (41) the elongated sound channel (42) of extending laterally.
9. Electret Condencer Microphone as claimed in claim 1 is characterized in that: between described bottom (4) and the described vibrating diaphragm (5) a conduction Air Filter (10) is arranged.
10. Electret Condencer Microphone as claimed in claim 9 is characterized in that: described conduction Air Filter (10) is for to be coated with the nonmetal net that is coated with conductive layer, or metal establishment net, or is provided with the sheet metal of aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200213408U CN201042076Y (en) | 2007-04-29 | 2007-04-29 | Capacitance type microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200213408U CN201042076Y (en) | 2007-04-29 | 2007-04-29 | Capacitance type microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201042076Y true CN201042076Y (en) | 2008-03-26 |
Family
ID=39253789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200213408U Expired - Fee Related CN201042076Y (en) | 2007-04-29 | 2007-04-29 | Capacitance type microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201042076Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081347A1 (en) * | 2009-01-19 | 2010-07-22 | 歌尔声学股份有限公司 | Insulating plate for a condenser microphone and a condenser microphone for using the insulating plate |
| CN102378093A (en) * | 2011-10-31 | 2012-03-14 | 歌尔声学股份有限公司 | Silicon microphone |
| CN101437188B (en) * | 2007-10-01 | 2012-08-29 | 财团法人工业技术研究院 | Acoustic transducer and microphone using the same |
| CN111263282A (en) * | 2018-11-30 | 2020-06-09 | 达菲感测有限公司 | Condenser microphone and manufacturing method thereof |
-
2007
- 2007-04-29 CN CNU2007200213408U patent/CN201042076Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101437188B (en) * | 2007-10-01 | 2012-08-29 | 财团法人工业技术研究院 | Acoustic transducer and microphone using the same |
| WO2010081347A1 (en) * | 2009-01-19 | 2010-07-22 | 歌尔声学股份有限公司 | Insulating plate for a condenser microphone and a condenser microphone for using the insulating plate |
| CN102378093A (en) * | 2011-10-31 | 2012-03-14 | 歌尔声学股份有限公司 | Silicon microphone |
| CN111263282A (en) * | 2018-11-30 | 2020-06-09 | 达菲感测有限公司 | Condenser microphone and manufacturing method thereof |
| CN111263282B (en) * | 2018-11-30 | 2021-11-09 | 达菲感测有限公司 | Condenser microphone and manufacturing method thereof |
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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: 20080326 Termination date: 20160429 |