CN205092966U - Electret microphone of directive property - Google Patents
Electret microphone of directive property Download PDFInfo
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- CN205092966U CN205092966U CN201520883887.3U CN201520883887U CN205092966U CN 205092966 U CN205092966 U CN 205092966U CN 201520883887 U CN201520883887 U CN 201520883887U CN 205092966 U CN205092966 U CN 205092966U
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- 238000013016 damping Methods 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Abstract
The utility model relates to an electret microphone of directive property, the lower extreme of cavity is equipped with the electric capacity structure, and the position that lies in the vibrating diaphragm below on the casing is provided with the main sound hole that feeds through with the vibrating diaphragm, being provided with first appearance chamber in the upper end of cavity, being provided with the infrasonic sound hole that communicates with first appearance chamber on the casing, still be equipped with the circuit board in the upper end of cavity, the second that is provided with intercommunication back electrode plate, circuit board on the cavity holds the chamber, holds the conductive part that intracavity was provided with electricity connection back electrode plate, circuit board at this second. The utility model discloses an electret microphone is provided with the second that link up to circuit board, back electrode plate and holds the chamber on its cavity, realized circuit board, the electric of back electrode plate from this and connected, the main sound hole of sound follow, inferior sound circulation passageway are used in the both sides of vibrating diaphragm respectively, and there have the acoustic pressure between the two to be poor for the vibrating diaphragm produces different sensitivity to coming from not equidirectional sound, and effective filtering noise has on every side from this improved the performance of electret microphone.
Description
Technical field
The utility model relates to acoustic-electric conversion art, and more specifically, the utility model relates to a kind of electret microphone, particularly relates to a kind of electret microphone of directive property.
Background technology
Along with the progress of society and the development of technology, the volume of the electronic product such as mobile phone, notebook computer is in continuous reduction, the performance requirement of people to these portable electronic products is but more and more higher, and this just requires, and the volume of electronic component supporting with it constantly reduces, performance and consistency improve constantly.Under this background, the microphone products field as one of the strength member of above-mentioned portable electronic products is also proposed a lot of novel products.
In prior art, in order to realize the pickup to a direction voice signal, generally through hole is set on the main circuit board of Electret Condencer Microphone, and the inside of Electret Condencer Microphone unit is provided with acoustic resistance, what make Electret Condencer Microphone defines certain phase difference by between main circuit board through hole and the voice signal entered by the sound hole on shell, Electret Condencer Microphone is mainly picked up the voice signal in its sound hole front, thus realizes single direction-pointing function.But the directive property electret microphone of this structure, the in use necessary perforate simultaneously in main circuit board face and shell surface direction, could realize the effect that single sensing product cuts down other direction sound.
Utility model content
An object of the present utility model there is provided a kind of electret microphone of directive property.
According to an aspect of the present utility model, a kind of electret microphone of directive property is provided, comprise housing and be positioned at the cavity of housing, be provided with the capacitance structure be made up of vibrating diaphragm, the back pole plate with through hole in the lower end of described cavity, the position described housing is positioned at below vibrating diaphragm is provided with the main acoustic aperture be communicated with vibrating diaphragm; The upper end of described cavity is provided with the first cavity volume, and described cavity is provided with the through hole being communicated with described first cavity volume and capacitance structure; Described housing is provided with the secondary acoustic aperture be communicated with the first cavity volume, wherein, the through hole that described acoustic aperture, the first cavity volume and cavity are arranged constitutes the secondary sound circulation passage that sound flows into, and is also provided with the damping structure for sound process in described sound circulation passage; Also be provided with the circuit board forming outer enclosure structure with housing in the upper end of described cavity, described cavity be provided with the second cavity volume being communicated with described back pole plate, circuit board, in this second cavity volume, be provided with the conductive part of the described back pole plate of electrical connection, circuit board.
Preferably, described cavity is also provided with the 3rd cavity volume, and is communicated with the air-flow via of described 3rd cavity volume and the first cavity volume, the secondary acoustic aperture that described housing is arranged is communicated with the 3rd cavity volume.
Preferably, described air-flow via is microcellular structure, and this microcellular structure constitutes the damping structure being arranged in time sound circulation passage.
Preferably, described damping structure is be arranged on the first damping mat in the 3rd cavity volume.
Preferably, the second damping mat covering described through hole is also comprised.
Preferably, the through hole that the through hole described cavity arranged and back pole plate are arranged is just to setting.
Preferably, the through hole that the through hole described cavity arranged and back pole plate are arranged staggers and arranges.
Preferably, described second damping mat at least extends from the through hole position of cavity the through hole covering described back pole plate.
Preferably, on described acoustic aperture bottom of being positioned at housing or sidewall.
Preferably, the 3rd damping mat of filling described first cavity volume is also comprised.
Electret microphone of the present utility model, its cavity is provided with through the second cavity volume to circuit board, back pole plate, thus achieves the electrical connection of circuit board, back pole plate; Sound acts on the both sides of vibrating diaphragm respectively from main acoustic aperture, secondary sound circulation passage, and there is acoustic pressure difference therebetween, vibrating diaphragm is made to produce different sensitivity to the sound from different directions, thus can noise effectively around filtering, improve the performance of electret microphone.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present utility model, further feature of the present utility model and advantage thereof will become clear.
Accompanying drawing explanation
What form a part for specification drawings describes embodiment of the present utility model, and together with the description for explaining principle of the present utility model.
Fig. 1 is the structural representation of the utility model electret microphone.
Fig. 2 is the structural representation that in Fig. 1, time acoustic aperture is arranged on housing sidewall.
Fig. 3 is the structural representation of the utility model electret microphone the second execution mode.
Fig. 4 is the structural representation that in Fig. 3, time acoustic aperture is arranged on housing sidewall.
Fig. 5 is the structural representation of the third execution mode of the utility model electret microphone.
Fig. 6 is the structural representation that in Fig. 5, time acoustic aperture is arranged on housing sidewall.
Fig. 7 is the structural representation of the utility model electret microphone the 4th kind of execution mode.
Embodiment
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit scope of the present utility model.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the utility model and application or use.
The technology and equipment known for person of ordinary skill in the relevant may not discuss in detail, but in the appropriate case, described technology and equipment should be regarded as a part for specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
With reference to figure 1, the utility model provides a kind of electret microphone of directive property, and comprise housing 1 and be positioned at the circuit board 3 of housing 1 upper end, this housing 1 has the inner chamber of one end open, circuit board 3 is arranged on the openend of housing 1, and constitutes the outer enclosure structure of microphone with housing 1.Cavity 2 is positioned at the inside of outer enclosure structure, and circuit board 3 can be supported on the openend position of housing 1 by this cavity 2.
Electret microphone of the present utility model, also comprise the capacitance structure be made up of vibrating diaphragm 5, the back pole plate 4 with through hole 40, this capacitance structure can be arranged on the lower end of cavity 2, and is supported on the diapire of housing 1.With reference to figure 1, vibrating diaphragm 5 is supported on the diapire of housing 1, and back pole plate 4 is suspended at the top of vibrating diaphragm 5 by sidewall portion or mode well-known to those skilled in the art.On described housing 1, the position be positioned at below vibrating diaphragm 5 is provided with the main acoustic aperture 10 be communicated with vibrating diaphragm 5; Extraneous sound can enter from this main acoustic aperture 10, and acts on the vibrating diaphragm 5 of capacitance structure, to realize the conversion of acoustic-electric.
Certainly, for a person skilled in the art, also can be adopt vibrating diaphragm 5 upper, back pole plate 4 under frame mode install.Such as, back pole plate 4 can be supported on the diapire of housing 1, and vibrating diaphragm 5 is suspended at the top of back pole plate 4 by sidewall portion or alternate manner well-known to those skilled in the art.Extraneous sound can enter from main acoustic aperture 10, through back pole plate 4 through hole 40 and act on vibrating diaphragm 5, to realize the conversion of acoustic-electric.
Electret microphone of the present utility model, is provided with the first cavity volume 24 in the upper end of described cavity 2, and described cavity 2 is provided with the through hole 20 being communicated with described first cavity volume 24 and capacitance structure.Cavity 2 can adopt plastic cement material, such as can form the first cavity volume 24, through hole 20 by modes such as injection mouldings, this the first cavity volume 24 is positioned at the top of cavity 2, it can extend in the horizontal direction, and be communicated with capacitance structure by through hole 20, specifically, be communicated with the vibrating diaphragm 5 in capacitance structure.
Described housing 1 is provided with the secondary acoustic aperture 11 be communicated with the first cavity volume 24, the through hole 20 that described acoustic aperture 11, first cavity volume 24 and cavity 2 are arranged is made to constitute the secondary sound circulation passage of sound inflow, extraneous sound can enter to the first cavity volume 24 from secondary acoustic aperture 11, through hole 20 on cavity 2, finally act on the vibrating diaphragm 5 of capacitance structure, to realize the function of acoustic-electric conversion.
In the execution mode that the utility model one is concrete, this time acoustic aperture 11 can directly be communicated with the first cavity volume 24, and that is, secondary acoustic aperture 11 is arranged on the position that housing 1 is directly communicated with the first cavity volume 24.In another concrete execution mode of the utility model, described cavity 2 is also provided with the 3rd cavity volume 22 and is communicated with the air-flow via 21 of described 3rd cavity volume 22 and the first cavity volume 24, secondary acoustic aperture 11 is directly communicated with the 3rd cavity volume 22.With reference to figure 1, the 3rd cavity volume 22 can be arranged on the lower end of the first cavity volume 24, thus, make this acoustic aperture 11 can be arranged on the diapire of housing 1, certainly, for a person skilled in the art, this time acoustic aperture 11 can also be arranged on the sidewall of housing 1, with reference to figure 2.After extraneous sound enters from secondary acoustic aperture 11, through the through hole 20 of the 3rd cavity volume 22, air-flow via 21, first cavity volume 24, cavity, finally act on vibrating diaphragm 5.
Electret microphone of the present utility model, described cavity 2 is also provided with the second cavity volume 23 being communicated with described back pole plate 4, circuit board 3, this second cavity volume 23 vertically distributes, the opening at its two ends fits together with circuit board 3, back pole plate 4 respectively, the conductive part of the described back pole plate 4 of electrical connection, circuit board 3 is provided with in this second cavity volume 23, thus can by the Signal transmissions of back pole plate 4 on circuit board 3.Conductive part of the present utility model can adopt contact rod well-known to those skilled in the art or spring etc.
Electret microphone of the present utility model, is also provided with the damping structure for sound process in described sound circulation passage; This damping structure can be arranged on the optional position of time sound circulation passage, can change the acoustic pressure of sound thus.In the execution mode that the utility model one is concrete, described air-flow via 21 is microcellular structure, and this microcellular structure constitutes the damping structure being arranged in time sound circulation passage.The aperture of microcellular structure can be 30-50 micron, and it has certain acoustic resistance effect, and this belongs to the common practise of those skilled in the art, no longer illustrates at this.
Electret microphone of the present utility model, extraneous sound enters from main acoustic aperture on the one hand, acts on the side of vibrating diaphragm; Enter from secondary acoustic aperture on the other hand, through time sound circulation passage, act on the opposite side of vibrating diaphragm; That is, extraneous sound acts on the both sides of vibrating diaphragm respectively by main acoustic aperture, secondary sound circulation passage, because secondary sound circulation passage has damping structure, the acoustic pressure of sound by time sound circulation passage can be reduced thus, physically increasing the path difference of sound through primary and secondary acoustic aperture arrival vibrating diaphragm.When external environment has the Speech input of different angles, the sensitivity of vibrating diaphragm can produce difference, that is, produces different sensitivity to the sound from different directions, vibrating diaphragm produces the signal of telecommunication and exports under the acting in conjunction of two-way sound wave, thus achieves the good directive property of electret microphone.
The utility model one preferred embodiment in, described damping structure is the first damping mat 7 be arranged in the 3rd cavity volume 22, with reference to figure 5.Now air-flow via 21 can be conventional through-hole structure.From the sound that secondary acoustic aperture 11 enters, through the first damping mat 7, the acoustic pressure of sound process can be reduced thus.
The utility model another preferred embodiment in, also comprise and cover the second damping mat 6 of described through hole 20, with reference to figure 3, Fig. 5, wherein, this second damping mat 6 can cover the upper end of through hole 20, also can be arranged on the lower end of through hole 20.With reference to figure 3, from the sound that secondary acoustic aperture 11, first cavity volume 24 enters, need to remake after the second damping mat 6 to be used on vibrating diaphragm, the acoustic pressure flowing through this position sound can be reduced thus.
The through hole 20 that cavity 2 is arranged can with the through hole 40 that arranges on back pole plate 4 just to setting, the utility model another preferred embodiment in, the through hole 40 that the through hole 20 that described cavity 2 is arranged and back pole plate 4 are arranged staggers and arranges; Further preferably, described second damping mat 6 at least extends from through hole 20 position of cavity 2 through hole 40 covering back pole plate 4.
The utility model further preferably, with reference to figure 7, is provided with the 3rd damping mat the 8, three damping mat 8 and is filled in the first cavity volume 24 in described first cavity volume 24; From the sound that secondary acoustic aperture 11 enters, need could arrive through the first damping mat 7, the 3rd damping mat 8, second damping mat 6 and act on vibrating diaphragm successively, by three damping mats arranged, regulate the acoustic pressure of sound in secondary sound circulation passage.Need be described, above-mentioned three damping mats, can be used alone, also can combination in any to using together, no longer illustrate at this.
Electret microphone of the present utility model, is provided with the 3rd cavity volume 22, makes time acoustic aperture 11 can be arranged on the bottom of housing 1, with reference to figure 1, Fig. 3, Fig. 5, sound is all entered to main acoustic aperture, secondary acoustic aperture from the bottom of housing 1.Certainly, of the present utility model time acoustic aperture 11 also can be arranged on the sidewall of housing 1, with reference to figure 2, Fig. 4, Fig. 6, sound can be entered in time acoustic aperture 11 from the sidewall of housing 1.
Electret microphone of the present utility model, its cavity is provided with through the second cavity volume to circuit board, back pole plate, thus achieves the electrical connection of circuit board, back pole plate; Sound acts on the both sides of vibrating diaphragm respectively from main acoustic aperture, secondary sound circulation passage, and there is acoustic pressure difference therebetween, vibrating diaphragm is made to produce different sensitivity to the sound from different directions, thus can noise effectively around filtering, improve the performance of electret microphone.
Although be described in detail specific embodiments more of the present utility model by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit scope of the present utility model.It should be appreciated by those skilled in the art, when not departing from scope and spirit of the present utility model, above embodiment can be modified.Scope of the present utility model is limited by claims.
Claims (10)
1. the electret microphone of a directive property, it is characterized in that: comprise housing (1) and be positioned at the cavity (2) of housing (1), be provided with the capacitance structure be made up of vibrating diaphragm (5), the back pole plate (4) with through hole (40) in the lower end of described cavity (2), the position described housing (1) being positioned at vibrating diaphragm (5) below is provided with the main acoustic aperture (10) be communicated with vibrating diaphragm (5); The upper end of described cavity (2) is provided with the first cavity volume (24), and described cavity (2) is provided with the through hole (20) being communicated with described first cavity volume (24) and capacitance structure; Described housing (1) is provided with the secondary acoustic aperture (11) be communicated with the first cavity volume (24), wherein, described the upper through hole (20) arranged of acoustic aperture (11), the first cavity volume (24) and cavity (2) constitutes the secondary sound circulation passage of sound inflow, is also provided with the damping structure for sound process in described sound circulation passage; The circuit board (3) forming outer enclosure structure with housing (1) is also provided with in the upper end of described cavity (2), described cavity (2) is provided with the second cavity volume (23) being communicated with described back pole plate (4), circuit board (3), in this second cavity volume (23), is provided with the conductive part of the described back pole plate of electrical connection (4), circuit board (3).
2. electret microphone according to claim 1, it is characterized in that: described cavity (2) is also provided with the 3rd cavity volume (22), and being communicated with the air-flow via (21) of described 3rd cavity volume (22) and the first cavity volume (24), the upper secondary acoustic aperture (11) arranged of described housing (1) is communicated with the 3rd cavity volume (22).
3. electret microphone according to claim 2, is characterized in that: described air-flow via (21) is microcellular structure, and this microcellular structure constitutes the damping structure being arranged in time sound circulation passage.
4. electret microphone according to claim 2, is characterized in that: described damping structure is for being arranged on the first damping mat (7) in the 3rd cavity volume (22).
5. the electret microphone according to any one of Claims 1-4, is characterized in that: also comprise the second damping mat (6) covering described through hole (20).
6. electret microphone according to claim 5, is characterized in that: the upper through hole (20) arranged of described cavity (2) and the upper through hole (40) arranged of back pole plate (4) are just to setting.
7. electret microphone according to claim 5, is characterized in that: the upper through hole (20) arranged of described cavity (2) staggers with the upper through hole (40) arranged of back pole plate (4) and arranges.
8. electret microphone according to claim 7, is characterized in that: described second damping mat (6) at least extends the through hole (40) covering described back pole plate (4) from through hole (20) position of cavity (2).
9. electret microphone according to claim 5, is characterized in that: on the bottom that described acoustic aperture (11) is positioned at housing (1) or sidewall.
10. electret microphone according to claim 5, is characterized in that: also comprise the 3rd damping mat (8) of filling described first cavity volume (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520883887.3U CN205092966U (en) | 2015-11-06 | 2015-11-06 | Electret microphone of directive property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520883887.3U CN205092966U (en) | 2015-11-06 | 2015-11-06 | Electret microphone of directive property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205092966U true CN205092966U (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520883887.3U Active CN205092966U (en) | 2015-11-06 | 2015-11-06 | Electret microphone of directive property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205092966U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040853A (en) * | 2017-04-17 | 2017-08-11 | 头领科技（昆山）有限公司 | A kind of loudspeaker and the earphone with the loudspeaker |
| CN113691915A (en) * | 2021-08-12 | 2021-11-23 | 湖南捷力泰科技有限公司 | Acoustic-electric conversion structure, electric signal amplification circuit and dual-mode microphone |
-
2015
- 2015-11-06 CN CN201520883887.3U patent/CN205092966U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040853A (en) * | 2017-04-17 | 2017-08-11 | 头领科技（昆山）有限公司 | A kind of loudspeaker and the earphone with the loudspeaker |
| CN107040853B (en) * | 2017-04-17 | 2023-11-21 | 昆山海菲曼科技集团股份有限公司 | Speaker and earphone with same |
| CN113691915A (en) * | 2021-08-12 | 2021-11-23 | 湖南捷力泰科技有限公司 | Acoustic-electric conversion structure, electric signal amplification circuit and dual-mode microphone |
| CN113691915B (en) * | 2021-08-12 | 2024-02-27 | 湖南捷力泰科技有限公司 | Acoustic-electric conversion structure, electric signal amplifying circuit and dual-mode microphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20200611 Address after: 266104 room 103, 396 Songling Road, Laoshan District, Qingdao, Shandong Province Patentee after: Goer Microelectronics Co.,Ltd. Address before: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee before: GOERTEK Inc. |
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| TR01 | Transfer of patent right |