CN205946166U - Single directional pickup silicon microphone - Google Patents
Single directional pickup silicon microphone Download PDFInfo
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- CN205946166U CN205946166U CN201620897113.0U CN201620897113U CN205946166U CN 205946166 U CN205946166 U CN 205946166U CN 201620897113 U CN201620897113 U CN 201620897113U CN 205946166 U CN205946166 U CN 205946166U
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- silicon microphone
- sound hole
- circuit board
- pickup
- damping piece
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Abstract
The utility model discloses a single directional pickup silicon microphone, the utility model discloses technical scheme silicon microphone includes casing and circuit board, the casing lid fits the chamber is held in circuit board and formation, it is equipped with the MEMS sensor to hold the chamber, MEMS sensor electricity is connected the circuit board, the casing is equipped with preceding sound inlet aperture, the circuit board is equipped with back sound inlet aperture, the MEMS sensor cover in back sound inlet aperture, back sound inlet aperture is equipped with its sealed damping piece. The utility model discloses technical scheme is through setting up back sound inlet aperture, and messenger silicon microphone reaches the pickup scope of single directive property, and with preceding sound inlet aperture towards the direction that needs the pickup, this back sound inlet aperture's setting can weaken the volume that other directions got into this silicon microphone to the sound that feasible needs picked up is more clear.
Description
Technical field
This utility model is related to mike technique field, particularly to a kind of single sensing pickup silicon microphone.
Background technology
Terminal electronic device, due to due to use environment, proposes different requirements, tradition to the pickup angle of mike
ECM (the Electret Capacitor Microphone) development through decades for the electret condenser microphone have been provided with
All referring to, single point to, double directional microphone pointing to three kinds of different pickup angular type.Due to traditional ECM inner space
Sufficiently large, design is relatively flexible, therefore, easily realizes required directivity product.And the new MEMS occurring at present
(Micro-Electro-Mechanical System) mike, is also called silicon microphone, due to by chip and product itself
The impact of structure, can only realize pickup angle be all referring to product.
Omnidirectional silicon microphone can pick up the sound of all directions, equally sensitive to the sound being derived from from all directions,
But can not make mainly to pick up sound and reach maximum it is impossible to effectively reduce noise.And unidirectivity silicon microphone is to from one
The sound of input can be carried out primary and secondary differentiation by the sound sensitive in direction as needed.
Utility model content
Main purpose of the present utility model is to provide a kind of single to point to pickup silicon microphone it is intended to by existing omnidirectional
Silicon microphone realizes single sensing pickup function, enriches silicon microphone product function, has expanded the application of silicon microphone.
For achieving the above object, the utility model proposes list point to pickup silicon microphone, including housing and circuit board, institute
State case lid and together in described circuit board and form accommodating chamber, described accommodating chamber is provided with MEMS sensor, described MEMS sensor electricity
Connect described circuit board, described housing is provided with front sound hole, described circuit board is provided with rear sound hole, described MEMS sensor covers
In described rear sound hole, described rear sound hole is provided with the damping piece being sealed against.
Further, described damping piece is placed in described rear sound hole.
Further, described damping piece is between described circuit board and described MEMS sensor.
Further, described damping piece fits in the side that described rear sound hole deviates from described housing.
Further, described rear sound hole is one or more.
Further, a diameter of 0.2mm to 1mm of described rear sound hole.
Further, described front sound hole is located at the top surface of described housing, described front sound hole and described MEMS sensor
Overlook as being crisscross arranged.
Further, described damping piece can control the volume of entering of described rear sound hole, and damping piece chooses foam, silk, steel
At least one of pottery of the steel disc of net, perforate or fluting, perforate or fluting is made.
Further, described housing and described circuit board junction are provided with sealant.
Technical solutions of the utility model are passed through to open up rear sound hole on circuit boards, and sensor is covered in rear sound hole, and
The mode of damping piece is set in rear sound hole, and the silicon microphone that original pickup angle is omnidirectional is improved to pickup angle
For the silicon microphone of unidirectivity, so that single point to the function that pickup silicon microphone has noise reduction.By front sound hole towards
Need the direction of pickup, the setting of this rear sound hole can weaken the volume that other directions enter this silicon microphone, so that
The sound needing pickup becomes apparent from.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 points to the structural representation of pickup silicon microphone one embodiment for this utility model list；
Fig. 2 is the upward view of single circuit board pointing to pickup silicon microphone in Fig. 1；
Fig. 3 is single explosive view pointing to pickup silicon microphone in Fig. 1；
Fig. 4 is existing single pickup areal map for omnidirectional for the pickup scope pointing to pickup silicon microphone；
Fig. 5 points to, for this utility model list, the pickup areal map that pickup silicon microphone pickup scope is unidirectivity.
Drawing reference numeral explanation：
The realization of this utility model purpose, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe it is clear that described embodiment is only a part of embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of this utility model protection.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in this utility model embodiment
It is only used for explaining the relative position relation between each part, motion conditions etc. under a certain particular pose (as shown in drawings), such as
When really this particular pose changes, then directionality instruction also correspondingly changes therewith.
In this utility model, unless otherwise clearly defined and limited, term " connection ", " fixation " etc. should do broad sense reason
Solution, for example, " fixation " can be fixedly connected or be detachably connected, or integral；Can be to be mechanically connected, also may be used
To be electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals
Or the interaction relationship of two elements, limit unless otherwise clear and definite.For the ordinary skill in the art, permissible
Understand concrete meaning in this utility model for the above-mentioned term as the case may be.
In addition, such as relating to the description of " first ", " second " etc. is only used for describing purpose in this utility model, and can not manage
Solve as indicating or implying its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can be expressed or implicitly include at least one this feature.In addition, the skill between each embodiment
Art scheme can be combined with each other, but must be capable of by those of ordinary skill in the art based on, when technical scheme
In conjunction with occurring conflicting or will be understood that the combination of this technical scheme does not exist when cannot realize, also not in this utility model
Within the protection domain requiring.
The utility model proposes a kind of single sensing pickup silicon microphone.
Referring to figs. 1 to 3, it is the structural representation of this utility model one embodiment.
In this utility model embodiment, referring specifically to Fig. 3, silicon microphone 10 includes housing 1 and circuit board 2, and housing 1 covers
Together in circuit board 2 and form accommodating chamber (sign), housing 1 and circuit board 2 junction are provided with sealant (sign), this sealing
Layer is specially fluid sealant, and the junction of housing 1 and circuit board 2 is sealed.This accommodating chamber is provided with MEMS (MEMS)
Sensor 3 and ASIC amplifier 5, MEMS sensor 3 and the equal electrical connection circuit plate 2 of ASIC amplifier 5, this ASIC amplifier 5 will
The electric model that MEMS sensor 3 is picked up is amplified.Housing 1 is provided with front sound hole 11, and circuit board 2 is provided with rear sound hole 21,
MEMS sensor 3 is covered in rear sound hole 21, and rear sound hole 21 is provided with damping piece 4.
Technical solutions of the utility model are passed through to open up rear sound hole 21 on the circuit board 2, and MEMS sensor 3 is covered in laggard
Acoustic aperture 21, and in rear sound hole 21, damping piece 4 is set so that the acoustic pressure being subject to before and after vibrating diaphragm in MEMS sensor 3 acts on not
With the silicon microphone being omnidirectional (referring to Fig. 5) by original pickup angle is improved to the silicon that pickup angle is unidirectivity
Mike, so that this silicon microphone 10 has the function of noise reduction.By front sound hole 11 towards the direction needing pickup, after this
The setting of sound hole 21 can weaken the volume that other directions enter this silicon microphone 10, so that needing the sound of pickup more
Plus it is clear.
By setting have different densities damping piece 4 or change after sound hole 21 diameter by way of laggard to change
Acoustic aperture 21 enters the size of volume, thus being adjusted to voice pickup scope, meets different demands.
Alternatively, damping piece 4 is placed in rear sound hole 21；Or damping piece 4 located at circuit board 2 and MEMS sensor 3 it
Between；Or damping piece 4 fits in the side that rear sound hole 21 deviates from housing 1.This embodiment is preferably after being placed in damping piece 4
Damping piece 4 is directly nuzzled circuit board 2 so that this silicon microphone 10 overall structure when producing this circuit board 2 by sound hole 21 in advance
It is easily installed.
In order to adjust further this silicon microphone 10 rear sound hole 21 enter volume, rear sound hole 21 may be configured as one
Or it is multiple.Control the scope of pickup sound by the rear sound hole 21 of the different number of setting.In embodiment of the present utility model
In after sound hole 21 be preferably one, the unidirectivity voice pickup scope that this silicon microphone 10 is formed be specially Fig. 5 shown in
Heart-shaped sensing.Make the sound sensitive to front sound hole 11 front wide scope for this silicon microphone 10, but to from front sound hole
The sound at 11 rears is insensitive.
Alternatively, a diameter of 0.2mm to 1mm of rear sound hole 21.After in the present embodiment, sound hole 21 diameter is preferably
0.6mm.But it is not limited only to above-mentioned selection, as long as the pore size that can reach same or like action effect is all optional
's.
So that this silicon microphone 10 is when using, the dust of in the air will not cause shadow to inside silicon microphone 10
Ring, by front sound hole 11 located at housing 1 top surface, front sound hole 11 and MEMS sensor 3 are overlooked as being crisscross arranged.In the air
If dust enters the inside of silicon microphone 10 by this front sound hole 11, will not fall within MEMS sensor 3, thus imitating to pickup
Fruit impacts, and makes the using effect of this silicon microphone 10 more preferably, extends the service life of this silicon microphone 10 further.
Alternatively, after damping piece 4 can control, sound hole 21 enters volume, damping piece 4 selection foam, silk, steel mesh, perforate
Or at least one of the pottery of steel disc, perforate or fluting of fluting makes.The material of this damping piece 4 can also for other have every
The material of sound function.When selecting the material of the compactness such as steel disc or pottery as damping piece 4, need to be beaten with laser thereon micro-
Hole, by aperture and the quantity of damping adjusting material micropore, to control the size by rear sound hole sound, thus reach singly referring to
To effect.
In this utility model embodiment, housing 1 is sealed with encapsulant with the junction of circuit board 2, reaches more preferably
Pickup effect.
This silicon microphone 10 can be applicable in intelligentized Furniture or field needed for other, by front sound hole 11 towards user
Zone of action, now, rear sound hole 21 is towards the inactive region of wall or user, the operation to user for the front sound hole 11
Instruction is identified, and other noises such as nonoperable instruction are weakened by the setting of this rear sound hole 21, so that this intelligent family
Tool more accurately identifies the operational order of user, is quick on the draw.
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model,
Every equivalent structure change under inventive concept of the present utility model, made using this utility model description and accompanying drawing content
Change, or directly/be indirectly used in other related technical fields and be included in scope of patent protection of the present utility model.
Claims (9)
1. a kind of single sensing pickup silicon microphone, including housing and circuit board, described case lid together in described circuit board and is formed
Accommodating chamber, described accommodating chamber is provided with MEMS sensor, and described MEMS sensor electrically connects described circuit board, before described housing is provided with
It is characterised in that described circuit board is provided with rear sound hole, described MEMS sensor is covered in described rear sound hole, institute to sound hole
State rear sound hole and be provided with the damping piece being sealed against.
2. as claimed in claim 1 single point to pickup silicon microphone it is characterised in that described damping piece be placed in described laggard
Acoustic aperture.
3. single pickup silicon microphone that points to as claimed in claim 1 is it is characterised in that described damping piece is located at described circuit board
And described MEMS sensor between.
4. as claimed in claim 1 single point to pickup silicon microphone it is characterised in that described damping piece fit in described laggard
Acoustic aperture deviates from the side of described housing.
5. single sensing pickup silicon microphone as claimed in claim 1 is it is characterised in that described rear sound hole is one or many
Individual.
6. as claimed in claim 1 single point to pickup silicon microphone it is characterised in that described rear sound hole a diameter of
0.2mm to 1mm.
7. the list as described in any one of claim 1 to 6 points to pickup silicon microphone it is characterised in that described front sound hole sets
In the top surface of described housing, described front sound hole and described MEMS sensor are overlooked as being crisscross arranged.
8. as claimed in claim 7 single point to pickup silicon microphone it is characterised in that described damping piece can control described laggard
Acoustic aperture enter volume, damping piece choose foam, silk, the steel disc of steel mesh, perforate or fluting, perforate or fluting pottery at least
One of make.
9. single pickup silicon microphone that points to as claimed in claim 8 is it is characterised in that described housing is connected with described circuit board
Place is provided with sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620897113.0U CN205946166U (en) | 2016-08-17 | 2016-08-17 | Single directional pickup silicon microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620897113.0U CN205946166U (en) | 2016-08-17 | 2016-08-17 | Single directional pickup silicon microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205946166U true CN205946166U (en) | 2017-02-08 |
Family
ID=57918411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620897113.0U Active CN205946166U (en) | 2016-08-17 | 2016-08-17 | Single directional pickup silicon microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205946166U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107241664A (en) * | 2017-08-09 | 2017-10-10 | 深圳北鱼信息科技有限公司 | A kind of microphone assembly |
| CN109646042A (en) * | 2019-01-29 | 2019-04-19 | 电子科技大学 | A kind of wearable heart sound and lungs sound monitoring device based on piezoelectric transducer |
| CN110475193A (en) * | 2019-09-05 | 2019-11-19 | 朝阳聚声泰（信丰）科技有限公司 | It is a kind of to be singly directed toward MEMS microphone and its production method |
| CN110611851A (en) * | 2019-10-25 | 2019-12-24 | 歌尔科技有限公司 | Single-directional microphone |
| CN112825532A (en) * | 2019-11-20 | 2021-05-21 | 华为技术有限公司 | Terminal device |
-
2016
- 2016-08-17 CN CN201620897113.0U patent/CN205946166U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107241664A (en) * | 2017-08-09 | 2017-10-10 | 深圳北鱼信息科技有限公司 | A kind of microphone assembly |
| CN109646042A (en) * | 2019-01-29 | 2019-04-19 | 电子科技大学 | A kind of wearable heart sound and lungs sound monitoring device based on piezoelectric transducer |
| CN110475193A (en) * | 2019-09-05 | 2019-11-19 | 朝阳聚声泰（信丰）科技有限公司 | It is a kind of to be singly directed toward MEMS microphone and its production method |
| CN110611851A (en) * | 2019-10-25 | 2019-12-24 | 歌尔科技有限公司 | Single-directional microphone |
| CN110611851B (en) * | 2019-10-25 | 2021-06-01 | 歌尔科技有限公司 | Single-directional microphone |
| CN112825532A (en) * | 2019-11-20 | 2021-05-21 | 华为技术有限公司 | Terminal device |
| WO2021098600A1 (en) * | 2019-11-20 | 2021-05-27 | 华为技术有限公司 | Terminal device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |