CN201509311U - Micro-capacitance type microphone - Google Patents
Micro-capacitance type microphone Download PDFInfo
- Publication number
- CN201509311U CN201509311U CN2009202389786U CN200920238978U CN201509311U CN 201509311 U CN201509311 U CN 201509311U CN 2009202389786 U CN2009202389786 U CN 2009202389786U CN 200920238978 U CN200920238978 U CN 200920238978U CN 201509311 U CN201509311 U CN 201509311U
- Authority
- CN
- China
- Prior art keywords
- wiring board
- circuit board
- base plate
- type microphone
- capacitor type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The utility model discloses a micro-capacitance type microphone which adopts the technical solution. The micro-capacitance type microphone comprises a circuit board base plate, a circuit board frame and a circuit board bottom plate to from a protective structure of a microphone, wherein a signal conversion chip is installed inside the circuit board base plate, sound holes for receiving external sound signals are arranged on the circuit board bottom plate, a plurality of bonding pads for installing the micro-capacitance type microphone are arranged outside the circuit board bottom plate, a circuit for connecting the circuit board base plate and the circuit board bottom plate is arranged in the circuit board frame, and a capacitance component capable of realizing sound-electricity conversion is installed on one side in the protective structure close to the circuit board bottom plate. In the micro-capacitance type microphone which is arranged on the circuit board of the bonding pads aiming at the sound holes, signal conversion chips and the sound holes are arranged on different circuit boards, the product area is reduced, the distance of the sound holes to the capacitance component is closer, the rear cavity has big volume, the product volume can be effectively reduced, the product performance can be improved, and components are reduced.
Description
Technical field
The utility model relates to a kind of midget microphone, relates to a kind of miniature capacitor type microphone specifically.
Background technology
Along with electronic products such as mobile phone, notebook, hearing aids are more and more littler to the dimensional requirement of inner body, the less miniature capacitor type microphone of taking measurements greatly is employed, and for example application number is that the Chinese patent of CN200480001301.0 has just been represented a kind of miniature capacitor type microphone structure.
Shown in accompanying drawing 7 (accompanying drawing 6 in the patent CN200480001301.0 specification); patent CN200480001301.0 has described a kind of condenser microphone; comprise that a square metal shell 102 and a wiring board 114 (are PCB; be used for bearer circuit and condenser microphone be fixedly installed to the electronic product main circuit board) the protection chamber that constitutes; in protection inside, chamber becket 103 is installed successively; backboard (also can be referred to as back pole plate) 104; pad 106; dead ring 108; diaphragm member 110; conducting ring 112; be formed with the sound hole 114a that is used to accept voice signal on the wiring board 114; be formed with the splicing ear 116 (also can be referred to as pad) that stretches out on the outer surface of wiring board 114; splicing ear 116 is as each electrode of condenser microphone; and condenser microphone can be fixedly installed on the electronic product main circuit board (for example main circuit board of mobile phone); and need to be provided with corresponding sound hole on the main circuit board, thereby can accept the outside sound signal with sound hole 114a.
Condenser microphone at this structure, the sound hole that is used to accept voice signal is arranged on the wiring board at splicing ear place, condenser microphone can be installed to the inboard of main circuit board, promptly reach said " zero elevation " installation in the industry, can reduce the installation thickness of electronic product on the whole.The condenser microphone of this structure also is called " Bottom " type products in the industry.
But, this design still exists great drawback, small product size commonly used at present is generally all about a few to tens of cubic millimeters, according to the product structure among the patent CN200480001301.0, the conversion of signals chip (not indicating symbol among the figure) that condenser microphone needs need be installed on the wiring board inner surface, and needs and sound hole separate certain distance, thereby cause the area of wiring board to increase; And diaphragm is far away apart from sound hole, and after diaphragm received voice signal, the volume at diaphragm rear (generally being referred to as " back cavity " in the industry) was very little, and this is unfavorable for the vibration of diaphragm, can cause sensitivity reduction etc. bad; At last, the part that this product structure needs is many, too complicated, is unfavorable for the reduction of product size and the raising of performance.
So, be arranged on the miniature capacitor type microphone on the wiring board at pad place at this sound hole, need a kind of even more ideal structure of design, can under less size, realize the better products performance.
The utility model content
Technical problem to be solved in the utility model provides a kind of miniature capacitor type microphone, miniature capacitor type microphone structure on this wiring board that is arranged on the pad place at this sound hole, the conversion of signals chip is arranged on the different wiring boards with sound hole, has reduced the product area; Sound hole is nearer apart from capacitance component, the back cavity volume is big, can effectively reduce small product size, and properties of product promote, part reduces.
For solving the problems of the technologies described above, the technical solution of the utility model is: miniature capacitor type microphone comprises: wiring board substrate, circuit board frame and wiring board base plate constitute the protection structure of microphone; Described wiring board substrate installed inside has the conversion of signals chip; Described wiring board base plate is provided with the sound hole that is used to receive the external sound signal, and described wiring board base plate outer setting has a plurality of pads that are used to install described miniature capacitor type microphone; Described circuit board frame inside is provided with the circuit that connects described wiring board substrate and described wiring board base plate; Described protection inside configuration is equipped with the capacitance component of realization sound-electricity conversion near a side of described wiring board base plate.Miniature capacitor type microphone structure on this wiring board that is arranged on the pad place at this sound hole, the conversion of signals chip is arranged on the different wiring boards with sound hole, has reduced the product area; Sound hole is nearer apart from capacitance component, the back cavity volume is big, can effectively reduce small product size, and properties of product promote, part reduces.
Improvement of the present utility model is: described capacitance component comprises fixed polar plate and vibrating diaphragm, and described vibrating diaphragm is arranged near described wiring board base plate one side.
Further improvement of the utility model is: described fixed polar plate is connected to described wiring board substrate by the elastic metallic device.
Improvement of the present utility model is: the circuit of described circuit board frame inside comprises endless metal screen and a plurality of cylindrical metal electrode of a ground connection.
Further improvement of the utility model is: described a plurality of cylindrical metal electrodes respectively by circular ground metal layer around.
Improvement of the present utility model is: described sound hole arranged outside has the sealing ring of annular protrusion.
Owing to adopted technique scheme, miniature capacitor type microphone comprises: wiring board substrate, circuit board frame and wiring board base plate constitute the protection structure of microphone; Wiring board substrate installed inside has the conversion of signals chip; The wiring board base plate is provided with the sound hole that is used to receive the external sound signal, and wiring board base plate outer setting has a plurality of pads that are used to install miniature capacitor type microphone; Circuit board frame inside is provided with the circuit of connection line base board and wiring board base plate; The protection inside configuration is equipped with the capacitance component of realization sound-electricity conversion near a side of wiring board base plate.Miniature capacitor type microphone structure on this wiring board that is arranged on the pad place at sound hole, the conversion of signals chip is arranged on the different wiring boards with sound hole, has reduced the product area; Sound hole is nearer apart from capacitance component, the back cavity volume is big, can effectively reduce small product size, and properties of product promote, part reduces.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the upward view of the utility model embodiment one;
Fig. 3 is the horizon-slice map of the circuit board frame of the utility model embodiment one;
Fig. 4 is the structural representation of the utility model embodiment two;
Fig. 5 is the upward view of the utility model embodiment two;
Fig. 6 is 21 kinds of horizon-slice maps that improve the circuit board frame of structure of the utility model embodiment;
Fig. 7 is the product structure schematic diagram of the utility model background technology.
Embodiment
Embodiment one:
Explain the miniature capacitor type microphone structure of the implementation case in conjunction with Fig. 1, Fig. 2 and Fig. 3.Its body shape is square, comprise: the wiring board substrate 1 that square resin material is a base material, the square tube shape resin material of a both ends open is circuit board frame 2 and square wiring board base plate 3 that resin material is a base material of base material, and the two ends that wiring board substrate 1 and wiring board base plate 3 are installed in circuit board frame 2 respectively form a protection structure; There is a conversion of signals chip 4 wiring board substrate 1 inboard welded and installed in advance; Wiring board base plate 3 is provided with a sound hole 33 that is used to receive voice signal, and wiring board base plate 3 outer setting have a plurality of pads 32 that are used to install miniature capacitor type microphone; Wiring board substrate 1 and wiring board base plate 3 inside are provided with metal level 11 and 31, circuit board frame 2 inside are provided with metal level 211 and a plurality of metal aperture 212 that can be electrically connected metal level 11,31, thereby road plate framework 2 can realize that with wiring board base plate 3 circuit is connected with wiring board substrate 1, wherein metal level 211 is grounded metallic shield layers of an annular, and a plurality of metal aperture 212 can connect other electrodes; The protection inside configuration is equipped with the capacitance component of realization sound-electricity conversion near a side of wiring board base plate 3, capacitance component comprises a fixed polar plate 5 and a vibrating diaphragm 7, vibrating diaphragm 7 is by a metal supporting rings 71 fixing and close wiring board base plate 3 one sides, isolate by isolation diaphragm 6 between fixed polar plate 5 and the vibrating diaphragm 7, and fixed polar plate 5 is provided with the air vent hole 51 that can connect protection inside configuration space; Fixed polar plate 5 is connected on the wiring board substrate 1 by an elastic metallic device, and the elastic metallic device that adopts in the present embodiment is set to metal spring 8.
The sound hole of this miniature capacitor type microphone is arranged on the wiring board substrate at pad place, the product structure of promptly so-called " Bottom " type, the protection structure that the utility model superposes and realizes product by wiring board substrate, circuit board frame and three layers of wiring board of wiring board base plate, thereby conversion of signals chip and sound hole can be arranged on the different two-layer wiring boards, reduce the product area; Sound hole is nearer apart from capacitance component, the sound that enters by sound hole can directly affact on the vibrating diaphragm, and the space at vibrating diaphragm rear is bigger, the space that can comprise fixed polar plate upper vent hole front and back, the back cavity volume is big, thereby can effectively reduce small product size, lifting properties of product, minimizing part.
The device that conversion of signals chip in the implementation case can select various miniature capacitor type microphones such as digital amplifier, analogue amplifier, FET to be suitable for.
The implementation case is preferred, and a metal spring is connected to fixed polar plate on the wiring board substrate, can avoid too complicated circuit board frame design, and metal spring can keep the stable of capacitance component, certainly, also can adopt other metallic elastic devices to connect.
The metal level of circuit base board and wiring board base plate interior is designed to technical scheme commonly used in the wiring board design in the implementation case, generally realizes that by plated-through hole and surface metal plating layer are set circuit is communicated with in the level of circuit intralamellar part.
" square " mentioned in the implementation case shape definition such as " square tube shapes " only is used for the preferable shape that case study on implementation is approximate is described, is not used for limiting protection range of the present utility model.
Embodiment two:
Explain the miniature capacitor type microphone structure of the implementation case in conjunction with Fig. 4 and Fig. 5.With respect to case study on implementation one, the implementation case has been done certain improvement: sound hole 33 arranged outside have the sealing ring 34 of annular protrusion.The design of sealing ring 34 can guarantee air-tightness between the sound hole on sound hole 33 and the main circuit board so that miniature capacitor type microphone is installed to after the electronic product main circuit board, thereby avoids that leakage sound etc. is bad.Sealing ring can adopt materials such as brazing metal, viscose to constitute.
The implementation case can also be made further and to improve, as shown in Figure 6, a plurality of cylindrical metal electrodes 212 respectively by circular ground metal layer 213 around.This design can avoid being subjected to electromagnetic interference so that cylindrical metal electrode 212 obtains electromagnetic shielding preferably, and improves acoustical behavior.
Claims (6)
1. miniature capacitor type microphone is characterized in that, comprising:
Wiring board substrate, circuit board frame and wiring board base plate constitute the protection structure of microphone;
Described wiring board substrate installed inside has the conversion of signals chip;
Described wiring board base plate is provided with the sound hole that is used to receive the external sound signal, and described wiring board base plate outer setting has a plurality of pads that are used to install described miniature capacitor type microphone;
Described circuit board frame inside is provided with the circuit that connects described wiring board substrate and described wiring board base plate;
Described protection inside configuration is equipped with the capacitance component of realization sound-electricity conversion near a side of described wiring board base plate.
2. miniature capacitor type microphone as claimed in claim 1 is characterized in that: described capacitance component comprises fixed polar plate and vibrating diaphragm, and described vibrating diaphragm is arranged near described wiring board base plate one side.
3. miniature capacitor type microphone as claimed in claim 2 is characterized in that: described fixed polar plate is connected to described wiring board substrate by the elastic metallic device.
4. miniature capacitor type microphone as claimed in claim 1 is characterized in that: the circuit of described circuit board frame inside comprises endless metal screen and a plurality of cylindrical metal electrode of a ground connection.
5. miniature capacitor type microphone as claimed in claim 4 is characterized in that: described a plurality of cylindrical metal electrodes respectively by circular ground metal layer around.
6. as claim 3 or 5 described miniature capacitor type microphones, it is characterized in that: described sound hole arranged outside has the sealing ring of annular protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202389786U CN201509311U (en) | 2009-09-27 | 2009-09-27 | Micro-capacitance type microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202389786U CN201509311U (en) | 2009-09-27 | 2009-09-27 | Micro-capacitance type microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201509311U true CN201509311U (en) | 2010-06-16 |
Family
ID=42470429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202389786U Expired - Lifetime CN201509311U (en) | 2009-09-27 | 2009-09-27 | Micro-capacitance type microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201509311U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256199A (en) * | 2010-10-12 | 2011-11-23 | 歌尔声学股份有限公司 | Micro capacitance microphone |
| CN102291660A (en) * | 2010-10-12 | 2011-12-21 | 歌尔声学股份有限公司 | Miniature capacitive microphone |
| CN107404807A (en) * | 2016-05-19 | 2017-11-28 | 中兴通讯股份有限公司 | Device for improving sounding of capacitor and terminal with device |
-
2009
- 2009-09-27 CN CN2009202389786U patent/CN201509311U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256199A (en) * | 2010-10-12 | 2011-11-23 | 歌尔声学股份有限公司 | Micro capacitance microphone |
| CN102291660A (en) * | 2010-10-12 | 2011-12-21 | 歌尔声学股份有限公司 | Miniature capacitive microphone |
| CN107404807A (en) * | 2016-05-19 | 2017-11-28 | 中兴通讯股份有限公司 | Device for improving sounding of capacitor and terminal with device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120250925A1 (en) | Packages and methods for packaging microphone devices | |
| CN209017322U (en) | Encapsulating structure, microphone and the electronic equipment of chip | |
| JP2013030822A (en) | Microphone unit and sound input device including the same | |
| KR100737726B1 (en) | Packaging structure of mems microphone | |
| CN109413554B (en) | Directional MEMS microphone | |
| CN201509311U (en) | Micro-capacitance type microphone | |
| CN113141566A (en) | Pickup assembly for microphone, bone conduction microphone and electronic product | |
| JP6057319B2 (en) | Condenser microphone | |
| CN202663538U (en) | Mems microphone | |
| CN201260243Y (en) | Automatic adhesion microphone | |
| CN202135316U (en) | Miniature condenser microphone | |
| CN202425037U (en) | MEMS (Micro Electronic Mechanical System) microphone | |
| TW201332378A (en) | Electret condenser microphone | |
| CN214756909U (en) | Pickup assembly for microphone, bone conduction microphone and electronic product | |
| CN202310075U (en) | Electro-acoustic transducer having shielding function | |
| JP5834818B2 (en) | Microphone unit and voice input device including the same | |
| CN201294630Y (en) | Anti-interference capacitance microphone | |
| CN210183544U (en) | Silicon microphone and electronic equipment | |
| US11711641B2 (en) | RF immune microphone | |
| CN209057365U (en) | A kind of encapsulating structure of MEMS microphone | |
| CN206332794U (en) | Ear noise-reducing headphone | |
| KR20090004982A (en) | Electret capacitor microphone | |
| CN201839434U (en) | Electret capacitance microphone | |
| CN201639733U (en) | Mems microphone | |
| CN201167414Y (en) | Miniature capacitance microphone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100616 |
|
| CX01 | Expiry of patent term |