CN201467439U - Electret capacitance type microphone with improved integral vocal cavity component - Google Patents
Electret capacitance type microphone with improved integral vocal cavity component Download PDFInfo
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- CN201467439U CN201467439U CN2009201248140U CN200920124814U CN201467439U CN 201467439 U CN201467439 U CN 201467439U CN 2009201248140 U CN2009201248140 U CN 2009201248140U CN 200920124814 U CN200920124814 U CN 200920124814U CN 201467439 U CN201467439 U CN 201467439U
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- vocal
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- vocal cavity
- sidewall
- cavity component
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Abstract
An electret capacitance type microphone with improved integral vocal cavity component belongs to the field of audible frequency devices. The number of spare parts of an existing structure is big, the progressive error is big, sundries and dust are easy to attach on the structure, the pass percent of finished products is low, and the assembling efficiency is low. The microphone comprises a shell body, a vibrating component, an insulating support and circuit board which are used for sealing a containing cavity of the shell body and are electrically connected with the shell body, wherein a first vocal cavity is formed between the vibrating component and the inner surface of the top of the shell body, and an outer shell hole is communicated with the first vocal cavity. The microphone is characterized in that the vibrating component, the insulating support between the circuit boards and an improved integral vocal cavity component formed by an annular side wall and a cavity plate integrally formed on the side wall are arranged inside the shell body, the cavity plate is provided with a through hole and is inwards depressed on the lower end of the side wall, a second vocal cavity is formed by the side wall and the cavity plate, the microphone has the advantages that multiple-functions of a plurality of the spare parts and the like are replaced and realized through the integral vocal cavity component, the number of the space parts is reduced, the production working procedure is simplified, the progressive error is reduced, the production cost is reduced, and the yield is high.
Description
[technical field]
The utility model relates to a kind of microphone, particularly has the electret capacitor microphone of modified model integral vocal cavity component, belongs to the audiofrequency apparatus field.
[background technology]
In recent years, the mini microphone that sound wave is converted to the signal of telecommunication is applied in communications industry (as telephone set, mobile phone), computer multi-media system (VoIP), electronic toy (as electronic game machine, voice-control toy) and the stereo set various products such as (for example DC, DV, MP3, MP4, audio frequency parts in hands-free) more and more, and wherein electret capacitor microphone (EMC) is used comparatively extensive.This microphone generally includes the metal shell that is surrounded by end face and sidewall, and the housing end face has some hole shape sound channels; Insert the oscillating plate in the housing, it comprises the vibrating membrane on becket and its annular end face; Back pole plate; Be arranged between back pole plate and the becket, make between back pole plate and the vibrating membrane ring of moulding that forms certain intervals; Place back pole plate below, make back pole plate and employing junction field effect transistor (JFET) wiring board cover the copper stent that copper is electrically connected.In order to prevent that back pole plate, copper stent are electrically connected with housing, also be equipped with the plastic annular support usually outside both it is insulated at this.
During electret condenser microphone work, sound wave is entered in the housing by the hole shape passage, cause vibrating membrane vibration in the container cavity, make the distance between the capacity plate antenna that vibrating membrane and back pole plate form change, thereby cause capacity plate antenna to change,, can choose one electret on its electret in advance wantonly owing to be coated with electret on vibrating membrane or the back pole plate, but there is a constant quantity of electric charge like this in the electret bound charge between electric capacity.Therefore when distance changes between two-plate, cause the change in voltage at electric capacity two ends, the acoustic-electric conversion effect of Xing Chenging has produced the faint signal of telecommunication like this, the signal of telecommunication is delivered to wiring board by copper stent then, is converted to the required signal of telecommunication through output after the processing of electronic component on the wiring board.
In housing, insert oscillating plate during assembling earlier, put into again and mould ring, put into back pole plate, copper stent and plastic stent then successively, put into wiring board at last and seal, dustcloth be set at the housing end face.This shows, the parts of existing structure are no less than 8, need the above operation in eight roads, the error accumulation of each part is got up and can be formed bigger accumulated error numerical value, because number of spare parts is many and volume is less, there is assembly difficulty in the requirement on machining accuracy height, and it directly has influence on product percent of pass and finished product consistency and material cost, cost of labor.In addition, based on making the present situation that assemble flow is long, operation is many, product parts expose for a long time in air and people's manual manipulation frequent, these two links cause part easily to stick foreign material and dust, influence susceptibility and product percent of pass.
[utility model content]
The technical assignment of the technical problems to be solved in the utility model and proposition is the defective that overcomes prior art, provides that a kind of number of spare parts is less, accumulated error obviously reduces, produces that assembly process is simplified, assembling is convenient, production cost is low, product percent of pass is high, the electret capacitor microphone with modified model integral vocal cavity component of more stable quality.For this reason, the utility model adopts following technical scheme:
Have the electret capacitor microphone of modified model integral vocal cavity component, comprising: end face has hole, has the housing of container cavity; Place the vibrating elements in the housing; The wiring board that is electrically connected with the housing periphery; Form first operatic tunes between described vibrating elements and the case top inner surface; Described sound hole is communicated with first operatic tunes; It is characterized in that being provided with successively in the described housing insulation spacer ring that places between vibrating elements, the wiring board and the modified model integral vocal cavity component that adopts the metallic conduction material to make; Described modified model integral vocal cavity component is made of annular sidewall and the chamber plate that is integrally formed at sidewall, have through hole and indent on the plate of described chamber in side wall lower ends, described sidewall and chamber plate form second operatic tunes, one insulating support is placed on outside the sidewall. and the modified model integral vocal cavity component of structure uniqueness is with the back pole plate in traditional electret condenser microphone, copper stent integrates, the chamber plate, sidewall is equivalent to the back pole plate of traditional structure respectively, copper stent, a part is realized capacitor plate simultaneously, the connector that is electrically connected with wiring board and form the function of second operatic tunes, reduced number of spare parts, overall structure and production process have been simplified, optimize the assembly relation of indispensable part, effectively reduced the part accumulated error; Be convenient to simultaneously assembling again, shorten installation time, promptly shorten part and be exposed to the time that reaches in the air through people's manual manipulation, guaranteed the susceptibility of part, thereby improved product quality, qualification rate, also having reduced production cost. sidewall shape is not limited to circle, can be for square, triangle, ellipse etc., it also is not limited to continuous closed ring, also can be other states such as interrupted indentation, the insulating support that is nested with outside sidewall can separate integral vocal cavity component and housing insulation, select to adopt electric conducting material to make integral vocal cavity component and satisfy the requirement that forms electric capacity one end pole plate. when the integral vocal cavity component end face is the plane, need the insulation spacer ring that vibrating elements and integral vocal cavity component is spaced apart, so that formation capacity plate antenna, and provide the space to be convenient to vibrate to vibrating elements, thereby form the signal of telecommunication of acoustic vibration.
For the improving and replenishing of technique scheme, can increase following technical characterictic:
Described chamber plate indent is in the upper end of sidewall, and formation top is that capacitance cavity, bottom are the upper and lower double cavity structure of second operatic tunes, and plate upper surface above sidewall in described chamber forms lug boss.Lug boss is wholely set on integral vocal cavity component, vibrating elements and integral vocal cavity component is spaced apart, the insulation spacer ring that cooperates plastic material to make, further optimize the product overall structure, the height that can adjust the insulation spacer ring according to actual needs satisfies the electric capacity of actual needs with formation.
Described wiring board is provided with input, and described sidewall bottom is electrically connected with input.Integral vocal cavity component is sent on the wiring board by the signal of telecommunication of sidewall bottom with acoustic vibration, is handled, is exported by the electronic component on it, and input can be the part that wiring board covers copper usually.
Described vibrating elements involving vibrations film and ring, described vibrating membrane is that insulating material is made, and the vibrating membrane upper surface is coated with metal material layer, and ring is arranged on the metal material layer, the ring periphery is electrically connected with the housing contact, and vibrating membrane lower surface and lug boss touch.Insulation material layer can be used as the electric charge that electret holds onto some in advance, when vibration takes place vibrating membrane, form the signal of telecommunication, ring has separated the inner surface and the vibrating membrane of case top, making has certain distance between the two, be convenient to the vibrating membrane vibration, play the conducting effect again, vibrating membrane metal material layer and housing are conducted.
The modified model integral vocal cavity component that the utility model adopts has substituted back pole plate, the copper stent in traditional electret condenser microphone, realized multinomial function simultaneously, by reducing number of spare parts, optimize overall structure, assembly relation and production process, reduced the part accumulated error; Be convenient to simultaneously assembling again, shorten installation time, reach and reduce part and be exposed in the air and, guaranteed the susceptibility of part, thereby made constant product quality, qualification rate height, also significantly reduced production cost thereupon through the time of people's manual manipulation.
[description of drawings]
Fig. 1 is the three-dimensional assembly structure schematic diagram of prior art;
Fig. 2 is the three-dimensional assembly structure schematic diagram of the utility model embodiment;
Fig. 3 is the planar structure schematic diagram of modified model integral vocal cavity component among the utility model embodiment;
Fig. 4 is the cross-sectional view of modified model integral vocal cavity component among the utility model embodiment;
Fig. 5 is the positive perspective view of modified model integral vocal cavity component among the utility model embodiment;
Fig. 6 is the reverse side perspective view of modified model integral vocal cavity component among the utility model embodiment;
Fig. 7 is the circuit theory diagrams of wiring board in the utility model.
Among the figure: 1, dustcloth, 2, aluminum hull, 3, oscillating plate, 4, mould ring, 5, back pole plate, 6, copper stent, 7, plastic stent, 8, wiring board, 100, electret capacitor microphone with modified model integral vocal cavity component, 101, dustcloth, 110, housing, 111, the sound hole, 112, top inner surface, 113, outer surface of cupular part, 114, housing connects the surface, 120, vibrating elements, 121, the vibrating membrane upper surface, 122, the vibrating membrane lower surface, 123, ring, 130, the insulation spacer ring, 140, the modified model integral vocal cavity component, 141, through hole, 142, chamber plate upper surface, 143, inner surface, 144, lug boss, 145, sidewall, 146, capacitance cavity, 147, second operatic tunes, 150, insulating support, 160, wiring board, 161, the wiring board upper surface, 162, input, 163, the wiring board outer surface.
[embodiment]
Below in conjunction with specification drawings and specific embodiments substantive distinguishing features of the present utility model is further described.
As shown in Figure 1, the electret capacitor microphone of prior art comprises dustcloth 1, is surrounded container cavity and is the aluminum hull 2 of being inverted bowl-type by end face and sidewall, and aluminum hull 2 end faces have the hole shape passage that some permission sound enter container cavity; The oscillating plate 3 of being located in the aluminum hull 2 and touching with the aluminum hull madial wall, it comprises becket and its vibrating membrane of being provided with of annular end face down; Back pole plate 5; Be arranged between back pole plate 5 and the becket, make between back pole plate and the oscillating plate form certain intervals mould ring 4; The copper stent 7 that places back pole plate 5 belows, back pole plate 5 is electrically connected with the input of the wiring board 8 that adopts junction field effect transistor (JFET).In order to prevent that back pole plate 5, copper stent 7 are electrically connected with aluminum hull 2, also be equipped with plastic annular support 6 usually outside both to its insulation at this.
Shown in Fig. 2-6, among the embodiment, electret capacitor microphone 100 with modified model integral vocal cavity component, comprise: adopt that metal material is made, have hole 111, have the housing 110 that surrounds container cavity by end face and shell wall, sticked dustcloth 101 on housing 110 outer surface of cupular part 113; Place the vibrating elements 120 in the housing; The ring 123 that vibrating elements 120 involving vibrations films and metal material are made, vibrating membrane is that insulation material layer is made, vibrating membrane upper surface 121 is coated with metal material layer, ring 123 is arranged on the metal material layer, vibrating membrane and enclosure interior upper surface are isolated, be convenient to the vibrating membrane vibration, ring 123 peripheries are electrically connected with housing 110 contacts, modes such as also available welding, bonding make ring 123 peripheries fixedly be electrically connected with housing 110, prevent that foreign material in the assembling process, dust from entering inside, influences susceptibility; The wiring board 160 that is used for shutoff housing 110 container cavities, it is electrically connected with housing 110 peripheries; Form first operatic tunes between vibrating elements 120 and housing 110 top inner surface 112; Sound hole 111 is communicated with first operatic tunes; Also be provided with successively in the housing 110 and place vibrating elements 120, insulation spacer ring 130 between the wiring board 150 and the modified model integral vocal cavity component 140 that adopts electric conducting material to make, modified model integral vocal cavity component 140 has second operatic tunes 147 that limited in the chamber of side wall lower ends plate by sidewall 145 and integrally formed and indent (among Fig. 4, highly be the part of H), the chamber plate has the through hole 141 on a plurality of thickness directions, sidewall 145 can be formed at chamber plate periphery, also can be formed at the periphery inboard, continuous annular or discontinuous overshooting shape all can, input 162 corresponding getting final product on its position and the wiring board 160, insulating support 150 is placed on outside the sidewall 145.
The sidewall of chamber plate upper surface more than 142 forms lug boss 144, and vibrating membrane lower surface 122 touches with lug boss 144.In order to increase interval between vibrating membrane and the modified model integral vocal cavity component (among Fig. 4, highly be the part of h), the insulation spacer ring 130 of plastics also can be set, when the value of h is 0, be that the upper surface 142 of chamber plate is not when promptly being provided with lug boss 144 for the plane, then must adopt insulation spacer ring 130, to guarantee to form capacitance cavity 146.
Wiring board upper surface 161 is provided with the input 162 that electronic component, annular cover copper, and sidewall 145 bottoms are electrically connected (be accessibly connected, also can adopt welding to wait other modes that is fixedly connected) with input 162, and wiring board outer surface 163 is electrically connected with housing 110.
During assembling, successively vibrating elements 120, insulation spacer ring 130, the modified model integral vocal cavity component 140 that has been nested with insulating support 150 are packed in the container cavity of housing 110, again with the openend of wiring board upper surface 161 corresponding modified model integral vocal cavity component shutoff, keep in touch by means of making wiring board 160 be connected surperficial 114 with housing at last such as crimping, welding, welding or the mechanical fasteners of cohering at housing 110.Wiring board outer surface 163 is exposed to the outside.
As shown in Figure 7, the bottom of modified model integral vocal cavity component 140 sidewalls 145 is contacted with the input 162 that wiring board covers copper, and coupled electrical signal is transmitted to electronic device in the wiring board 160, carries out signal processing, output audio signal.Also can adopt the modulus switching device (not shown) that coupled electrical signal is transmitted to wiring board 160, carry out analog-to-digital conversion after, the outputting digital audio signal.
For housing and interior parts thereof, be not limited to circular cross section, but also can be rectangle, the shape of other practical applications such as rhombus.
More than the electret capacitor microphone with modified model integral vocal cavity component shown in the drawings be specific embodiment of the utility model, substantive distinguishing features of the present utility model and progress have been embodied, can be according to the use needs of reality, to its modification of carrying out aspects such as the quantity in material, shape, specification, hole and color, seldom give unnecessary details at this.
Claims (4)
1. have the electret capacitor microphone of modified model integral vocal cavity component, comprising:
End face has hole (111), has the housing (110) of container cavity;
Place the vibrating elements (120) in the housing;
The wiring board (160) that is electrically connected with housing (110) periphery;
Form first operatic tunes between described vibrating elements (120) and housing (110) top inner surface (112);
Described sound hole (111) is communicated with first operatic tunes;
It is characterized in that being provided with successively in the described housing (110) insulation spacer ring (130) that places between vibrating elements (120), the wiring board (160) and the modified model integral vocal cavity component (140) that adopts the metallic conduction material to make; Described modified model integral vocal cavity component (140) is made of annular sidewall (145) and the chamber plate that is integrally formed at sidewall, have through hole (141) and indent on the plate of described chamber in side wall lower ends, described sidewall (145) and chamber plate form second operatic tunes, and an insulating support (150) is placed on outside the sidewall (145).
2. the electret capacitor microphone with modified model integral vocal cavity component according to claim 1, it is characterized in that described chamber plate indent is in the upper end of sidewall (145), formation top is that capacitance cavity (146), bottom are the upper and lower double cavity structure of second operatic tunes (147), and the above sidewall of described chamber plate upper surface (142) forms lug boss (144).
3. the electret capacitor microphone with modified model integral vocal cavity component according to claim 2 is characterized in that described wiring board (160) is provided with input (162), and described sidewall (145) bottom is electrically connected with input (162).
4. the electret capacitor microphone with modified model integral vocal cavity component according to claim 3, it is characterized in that described vibrating elements (120) involving vibrations film and ring (123), described vibrating membrane is that insulating material is made, vibrating membrane upper surface (121) is coated with metal material layer, ring (123) is arranged on the metal material layer, ring (123) periphery is electrically connected with housing (110) contact, and vibrating membrane lower surface (122) touches with lug boss (144).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201248140U CN201467439U (en) | 2009-07-16 | 2009-07-16 | Electret capacitance type microphone with improved integral vocal cavity component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201248140U CN201467439U (en) | 2009-07-16 | 2009-07-16 | Electret capacitance type microphone with improved integral vocal cavity component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201467439U true CN201467439U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201248140U Expired - Fee Related CN201467439U (en) | 2009-07-16 | 2009-07-16 | Electret capacitance type microphone with improved integral vocal cavity component |
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| Country | Link |
|---|---|
| CN (1) | CN201467439U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112118522A (en) * | 2020-09-29 | 2020-12-22 | 瑞声声学科技(深圳)有限公司 | MEMS microphone |
-
2009
- 2009-07-16 CN CN2009201248140U patent/CN201467439U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112118522A (en) * | 2020-09-29 | 2020-12-22 | 瑞声声学科技(深圳)有限公司 | MEMS microphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20110716 |