CN106231518A - Modified model electret-type capacitor microphone - Google Patents
Modified model electret-type capacitor microphone Download PDFInfo
- Publication number
- CN106231518A CN106231518A CN201610773529.6A CN201610773529A CN106231518A CN 106231518 A CN106231518 A CN 106231518A CN 201610773529 A CN201610773529 A CN 201610773529A CN 106231518 A CN106231518 A CN 106231518A
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- CN
- China
- Prior art keywords
- sound
- hole
- back pole
- pole plate
- circuit board
- 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.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/01—Electrostatic transducers characterised by the use of electrets
- H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The open a kind of modified model electret-type capacitor microphone of the present invention, including shell, insulation ring plate, sound film, annular gasket, back pole plate, circuit board and damping sheet, this shell is provided with a plurality of sound inlet, this insulation ring plate is installed in shell, this sound film, annular gasket and back pole plate are loaded in insulation ring plate, sound chamber before being formed between sound film and back pole plate, it is provided with a plurality of sender in back pole plate, circuit board is installed on back pole plate upper surface, it is provided with a plurality of first through hole in circuit board, damping sheet is loaded on circuit board upper surface, it is provided with a plurality of second through hole in damping sheet, these a plurality of second through holes are respectively less than the first through hole, and sender, first through hole and the second through hole communicate with each other, in back pole plate, sound chamber after being formed between circuit board and damping sheet.Thereby, form the rear sound chamber corresponding with front sound chamber by utilizing back pole plate, circuit board to stack gradually with damping sheet, improve microphone construction, simplify production technology, reduce production cost.
Description
Technical field
The present invention relates to acoustic-electric conversion art technology, refer in particular to a kind of modified model electret-type capacitor microphone.
Background technology
Tradition electret capcitor microphone, mainly includes shell, steel mesh, diaphragm, annular gasket, back pole plate, backplane
Seat, connection ring and circuit board.Wherein, annular gasket makes to keep certain distance to form parallel plate capacitor between back pole plate and diaphragm
Device, connects ring and is arranged between back pole plate and circuit board, and back pole plate, connection ring and circuit board form rear sound chamber, this rear sound chamber master
Being used for when diaphragm shakes, provide a pressure difference to diaphragm, the sound quality for microphone plays the most crucial effect.
When sound waves is transmitted to diaphragm by the sound hole on shell, by the vibration of diaphragm, change shape between diaphragm and back pole plate
The distance of the plane-parallel capacitor become, is allowed to produce a current signal, it is achieved the purpose of acoustic-electric conversion.But, this kind of transaudient
After device composition, the required part in sound chamber is many, and structure is complicated, and, the back-pole base complex manufacturing technology that wherein must use, cost
High.Therefore, tackle existing microphone and improve, to solve the problems referred to above.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose is to provide a kind of modified model electret
Body formula condenser microphone, forms the rear sound corresponding with front sound chamber by utilizing back pole plate, circuit board to stack gradually with damping sheet
Chamber, this rear sound chamber is simpler relative to sound chamber composition structure after traditional microphones, eliminates connection ring, simplifies microphone
Production technology, reduce production cost.
For achieving the above object, the present invention uses such as purgation technical scheme:
A kind of modified model electret-type capacitor microphone, the front Air Filter include shell, being installed in shell, insulation ring plate,
Sound film, annular gasket, back pole plate, circuit board, damping sheet, damping fin, rear Air Filter and upper cover, this shell is provided with a plurality of
Sound inlet, this front Air Filter covers sound inlet, and this insulation ring plate is vertically arranged in shell in the form of a ring, this sound film, air ring
Sheet and back pole plate stack gradually and are installed in insulation ring plate, form the front sound for collecting sound between sound film and back pole plate
Chamber, is provided with a plurality of sender on back pole plate, and foregoing circuit plate is installed on back pole plate upper surface, and on circuit board, correspondence goes out
Sound hole is provided with a plurality of first through hole, and this damping sheet is installed on circuit board upper surface, corresponding first through hole on damping sheet
Being provided with a plurality of second through hole, these a plurality of second through holes are respectively less than the first through hole, and sender, the first through hole and second are logical
Hole communicates with each other, and a plurality of first through holes, the second through hole and above-mentioned sender are in shape between back pole plate, circuit board and damping sheet
Become the rear sound chamber connected with above-mentioned front sound chamber；This damping fin is installed on damping sheet upper surface；The cooperation of this upper cover is installed on shell；
This rear Air Filter is installed on inside upper cover.
As a kind of preferred version: described insulation ring plate is macromolecule membrane material.
As a kind of preferred version: described shell has a containing cavity, and above-mentioned a plurality of sound inlets are arranged at this containing cavity
Bottom.
As a kind of preferred version: at least provided with an opening on described shell, foregoing circuit plate at least one end is by opening
Mouth stretches out in housing exterior, stretches out in circuit board and is provided with solder joint on the end of shell.
As a kind of preferred version: covering on described and be provided with a plurality of third through-hole, above-mentioned rear Air Filter covers this
Third through-hole.
As a kind of preferred version: be wholely set one for sound film being tightened the film ring that stretches tight strutted below described sound film,
This film ring that stretches tight is positioned at above above-mentioned front Air Filter.
The present invention compared with prior art has clear advantage and beneficial effect, specifically, by technique scheme
Understand, by arranging sender on back pole plate, the first through hole be set on circuit board, the second through hole is set on damping sheet,
After three being stacked gradually, forming the rear sound chamber corresponding with front sound chamber, this rear sound chamber is relative to sound chamber after traditional microphones
Composition simple in construction, eliminates connection ring, thus simplifies the production technology of microphone, reduce production cost.
For more clearly illustrating architectural feature and effect of the present invention, with specific embodiment, it is entered below in conjunction with the accompanying drawings
Row describes in detail.
Accompanying drawing explanation
Fig. 1 is the microphone schematic perspective view of the present invention；
Fig. 2 is the horizontal cross-sectional schematic of microphone of the present invention；
Fig. 3 is enlarged diagram at the M of Fig. 2；
Fig. 4 is enlarged diagram at the N of Fig. 2；
Fig. 5 is the microphone decomposing schematic representation of the present invention.
Accompanying drawing identifier declaration:
10, shell 11, accommodating cavity
12, opening 13, sound inlet
20, front Air Filter 30, insulation ring plate
40, sound film 41, stretch tight film ring
50, annular gasket 60, back pole plate
61, sender 70, circuit board
71, the first through hole 72, solder joint
80, damping sheet the 81, second through hole
90, damping fin 100, rear Air Filter
110, upper cover 111, third through-hole
120, front sound chamber 130, rear sound chamber.
Detailed description of the invention
The present invention as shown in Figures 1 to 5, a kind of modified model electret-type capacitor microphone, include shell 10, front dust-proof
Net 20, insulation ring plate 30, sound film 40, annular gasket 50, back pole plate 60, circuit board 70, damping sheet 80, damping fin 90, rear dust-proof
Net 100 and upper cover 110, wherein:
This shell 10 is metal material, and it has one and houses cavity 11, is respectively arranged with an opening 12 in shell two ends, in this appearance
Put and bottom cavity 11, offer a plurality of sound inlet 13 for collecting sound.
This front Air Filter 20 is positioned at bottom above-mentioned accommodating cavity 11, covers sound inlet 13, and dust can be prevented by sound inlet
13 enter inside microphones, and metal material selected by this front Air Filter 20, take micropore to enter sound design, can meet sound head waterproof,
Dust reduction capability, takes into account function of shielding simultaneously, can be obviously improved shield effectiveness.
This insulation ring plate 30 is the most laminar, and it is vertically arranged in accommodating cavity 11, by sound film 40 and back pole plate 60
Keeping apart with shell 10, this insulation ring plate 30 is abandoned using tradition plastic mould compacting cavity, uses high molecular film material generation
Replacing, the selection space on the temperature resistance energy, insulating properties of material is wider, makes processing and fabricating more convenient, the sky that part takies
Between less, design more motility.
This sound film 40 is installed on inside above-mentioned front Air Filter 20, has been wholely set one for by sound film below this sound film 40
40 tighten the annular strutted stretches tight film ring 41, and this film ring 41 that stretches tight is positioned at above front Air Filter 20.
This annular gasket 50 is installed on sound film 40 upper surface periphery ringwise.
This back pole plate 60 is installed on annular gasket 50, and back pole plate 60 and sound film 40 are separated by above-mentioned annular gasket 50, and
Formed between back pole plate 60 and sound film 40 for collecting the front sound chamber 120 of sound, this back pole plate 60 is provided with a plurality of with
The sender 61 that above-mentioned sound inlet 13 is corresponding.
This circuit board 70 is installed on back pole plate 60 upper surface, and circuit board 70 two ends are stretched out by above-mentioned shell 10 upper shed 12
(it should be noted that circuit board 70 is not limited to only two ends, it is also possible to be arranged as required to as one end, three ends, four ends etc.,
Correspondence, the number of shell 10 upper shed 12 is one, three, four etc., and circuit board 70 is respectively held and stretched out by opening 12).
Two external parts in circuit board 70 are respectively arranged with solder joint 72, be provided with a plurality of and go out sound on circuit board 70
The first through hole 71 that hole 61 is corresponding；This circuit board use edge draw design, make the installation of finished product be connected with wiring more convenient,
Reliably, due to all-metal closure designs, the shield effectiveness of sound head is made to be obviously improved.
This damping sheet 80 is installed on circuit board 70 upper surface, and on damping sheet 80, corresponding first through hole 71 is provided with a plurality of
Second through hole 81, these a plurality of second through holes 81 are respectively less than the first through hole 71, these a plurality of first through hole 71, second through holes
81 communicate with each other with above-mentioned sender 61, a plurality of first through hole the 71, second through holes 81 and above-mentioned sender 61 in back pole plate 60,
Sound chamber 130 after being formed between circuit board 70 and damping sheet 80, the connection corresponding with above-mentioned front sound chamber 120 of this rear sound chamber 130.
This microphone by back pole plate 60, circuit board 70 and damping sheet 80 composite design, circuit board 70 undertake device install,
On the basis of wire connects, take into account sound chamber 130 function after sound head the most simultaneously；Zero distance is taked in signal output after sound, electricity conversion
Connect design, the direct-connected design taken face and face between back pole plate 60 and circuit board 70, putting and putting, reduce use wire pair
The decay of the signal of telecommunication and interference, reduce contact resistance, is effectively improved signal output usefulness.
This damping fin 90 is installed on above-mentioned damping sheet 80 upper surface.
This upper cover 110 coordinates and is installed on shell 10, is provided with a plurality of third through-hole 111 on upper cover 110, above-mentioned after
Air Filter 100 covers a plurality of third through-hole 111, and above-mentioned damping fin 90 is positioned at below this rear Air Filter 100.
This microphone is ultra-thin square unidirectivity sound head design, makes sound head more clever with coordinating of finished product structure
Activity and suitability；Square vibration sound film designs, and under the characteristic that pickup effective area is big, makes sound film 40 be provided with multiple resonance
Frequency point, makes the voice pickup of different frequency range more equalize, and the acoustical quality making sound head is more perfect；And, use full-shield
Connect design with zero distance, effectively prevent the interference to useful signal of other signal and electromagnetic wave, reduce the intrinsic of sound head
Noise, significantly improves sound head characteristic；It addition, damp, with gap, the modular design combined by air damping, make acoustic damping
The most careful stable.
The design focal point of the present invention is, by arranging sender on back pole plate, arranges the first through hole on circuit board,
Second through hole is set on damping sheet, and makes sender, the first through hole and the second through hole communicate with each other, by back pole plate, circuit board
After stacking gradually with damping sheet, i.e. forming the rear sound chamber of connection corresponding with front sound chamber, this rear sound chamber is relative to sound chamber after tradition, group
Become structure simpler, eliminate connection ring, thus simplify the production technology of microphone, reduce production cost.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the technical scope of the present invention,
Therefore every technical spirit according to the present invention is to any trickle amendment made for any of the above embodiments, equivalent variations and modification, the most still
Belong in the range of technical solution of the present invention.
Claims (6)
1. a modified model electret-type capacitor microphone, it is characterised in that: include shell, be installed in shell front dust-proof
Net, insulation ring plate, sound film, annular gasket, back pole plate, circuit board, damping sheet, damping fin, rear Air Filter and upper cover, on this shell
Being provided with a plurality of sound inlet, this front Air Filter covers sound inlet, and this insulation ring plate is vertically arranged in shell in the form of a ring, should
Sound film, annular gasket and back pole plate stack gradually and are installed in insulation ring plate, formed and be used for collecting between sound film and back pole plate
The front sound chamber of sound, is provided with a plurality of sender on back pole plate, and foregoing circuit plate is installed on back pole plate upper surface, in circuit
On plate, corresponding sender is provided with a plurality of first through hole, and this damping sheet is installed on circuit board upper surface, right on damping sheet
Answering the first through hole to be provided with a plurality of second through hole, these a plurality of second through holes are respectively less than the first through hole, and sender, first lead to
Hole and the second through hole communicate with each other, and a plurality of first through holes, the second through hole and above-mentioned sender are in back pole plate, circuit board and resistance
The rear sound chamber connected with above-mentioned front sound chamber is formed between Buddhist nun's plate；This damping fin is installed on damping sheet upper surface；This upper cover coordinates peace
It is loaded on shell；This rear Air Filter is installed on inside upper cover.
Modified model electret-type capacitor microphone the most according to claim 1, it is characterised in that: described insulation ring plate is high
Molecular film material.
Modified model electret-type capacitor microphone the most according to claim 1, it is characterised in that: described shell has an appearance
Putting chamber, above-mentioned a plurality of sound inlets are arranged at bottom this containing cavity.
Modified model electret-type capacitor microphone the most according to claim 1, it is characterised in that: at least set on described shell
Being equipped with an opening, foregoing circuit plate at least one end is stretched out in housing exterior by opening, stretches out in the end of shell in circuit board
On be provided with solder joint.
Modified model electret-type capacitor microphone the most according to claim 1, it is characterised in that: cover on described and be provided with
A plurality of third through-holes, above-mentioned rear Air Filter covers this third through-hole.
Modified model electret-type capacitor microphone the most according to claim 1, it is characterised in that: one below described sound film
Being provided with one for sound film is tightened the film ring that stretches tight strutted, this film ring that stretches tight is positioned at above above-mentioned front Air Filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610773529.6A CN106231518B (en) | 2016-08-31 | 2016-08-31 | Improved electret type capacitor microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610773529.6A CN106231518B (en) | 2016-08-31 | 2016-08-31 | Improved electret type capacitor microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106231518A true CN106231518A (en) | 2016-12-14 |
| CN106231518B CN106231518B (en) | 2022-02-08 |
Family
ID=58072468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610773529.6A Active CN106231518B (en) | 2016-08-31 | 2016-08-31 | Improved electret type capacitor microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106231518B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107594772A (en) * | 2017-09-27 | 2018-01-19 | 深圳市正德创控科技有限公司 | Buckle device for seatbelt |
| CN109379684A (en) * | 2018-10-09 | 2019-02-22 | 歌尔股份有限公司 | Microphone and electronic equipment |
| CN111770424A (en) * | 2020-06-24 | 2020-10-13 | 瑞声科技（南京）有限公司 | Energy converter |
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| US3895194A (en) * | 1973-05-29 | 1975-07-15 | Thermo Electron Corp | Directional condenser electret microphone |
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| CN204733371U (en) * | 2015-06-14 | 2015-10-28 | 高邮市华声电子有限公司 | A kind of wideband antinoise microphone |
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| CN202602877U (en) * | 2012-06-18 | 2012-12-12 | 潍坊新港电子有限公司 | Microphone capable of eliminating vibration noise |
| CN204733371U (en) * | 2015-06-14 | 2015-10-28 | 高邮市华声电子有限公司 | A kind of wideband antinoise microphone |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107594772A (en) * | 2017-09-27 | 2018-01-19 | 深圳市正德创控科技有限公司 | Buckle device for seatbelt |
| CN109379684A (en) * | 2018-10-09 | 2019-02-22 | 歌尔股份有限公司 | Microphone and electronic equipment |
| CN111770424A (en) * | 2020-06-24 | 2020-10-13 | 瑞声科技（南京）有限公司 | Energy converter |
| CN111770424B (en) * | 2020-06-24 | 2021-09-07 | 瑞声科技（南京）有限公司 | Energy converter |
| WO2021258478A1 (en) * | 2020-06-24 | 2021-12-30 | 瑞声声学科技(深圳)有限公司 | Transducer |
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|---|---|
| CN106231518B (en) | 2022-02-08 |
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