CN102256199A - Micro capacitance microphone - Google Patents
Micro capacitance microphone Download PDFInfo
- Publication number
- CN102256199A CN102256199A CN2011101705152A CN201110170515A CN102256199A CN 102256199 A CN102256199 A CN 102256199A CN 2011101705152 A CN2011101705152 A CN 2011101705152A CN 201110170515 A CN201110170515 A CN 201110170515A CN 102256199 A CN102256199 A CN 102256199A
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- CN
- China
- Prior art keywords
- circuit board
- board frame
- type microphone
- capacitance type
- miniature
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention discloses a micro capacitance microphone which has a protecting structure, wherein the protecting structure is composed of a circuit board substrate, a first hollow circuit board frame, a second hollow circuit board frame and a baseboard; an electronic element is arranged on the circuit board substrate; a capacitance component is mounted in the protecting structure; a blocking slot is formed by the first hollow circuit board frame, the second hollow circuit board frame and the baseboard; and the capacitance component is mounted in the blocking slot. With such a design, the micro capacitance microphone has the advantages that the number of parts is reduced, the elastic device having hidden danger in reliability is omitted, the smaller size can be achieved, the assembling process is simple; the micro capacitance microphone is convenient for automatic production and has low production cost and high reliability.
Description
Technical field
The present invention relates to a kind of mini microphone, is a kind of miniature capacitance 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, take measurements greatly less, quality is better and lower-cost miniature capacitance type microphone is employed.At present; the miniature capacitance type microphone volume that has occurred on the market is generally on tens cubic millimeters size; under this size; if according to traditional miniature capacitance type microphone design; basic structure is that a metal shell and a wiring board form a bearer bar; inside is equipped with plays support; the plastic chamber of insulating effect; inside cavity is equipped with the metal grating ring and is used for circuit turn-on; grating ring connects pole plate; pole plate forms capacitance component by an insulation diaphragm and vibrating diaphragm, because the size of its inner body is bigger; quantity is more, certainly will influence properties of product; on rule, exist contradictory relation between the size of product and the performance.So, there is new design to propose to use an elastic sheet metal or spring to replace original grating ring, this can improve properties of product to a certain extent, but the problem that exists is because the elastic part size of this structure applications is minimum, the assembly technology complexity, part production difficulty is big, cost is high, product reliability is not enough, and the difficulty of automated production strengthens, and this constructed products, the highly constrained further reduction of product total height of elastic part.
So, need design a kind of can reach lower size, assembly technology simple, be convenient to automated production, production cost is low, product reliability is good new construction miniature capacitance type microphone.
Summary of the invention
Technical problem to be solved by this invention provide a kind of can reach lower size, assembly technology simple, be convenient to automated production, production cost is low, product reliability is good new construction miniature capacitance type microphone.
For solving the problems of the technologies described above; technical scheme of the present invention is: a kind of miniature capacitance type microphone; comprise the wiring board substrate that electronic devices and components are installed, first circuit board frame of hollow, second circuit board frame and the base plate composition protection structure of hollow; the protection inside configuration is equipped with capacitance component; described first circuit board frame, second circuit board frame and base plate constitute a draw-in groove, and described capacitance component is installed in the described draw-in groove.
The improvement of the technical program is that the inboard of described first circuit board frame is provided with the projection towards the center, and described projection protrudes in the inboard of described second circuit board frame, and constitutes described draw-in groove with described base plate.
The improvement of the technical program is that described projection is symmetrically distributed in the inboard of described first circuit board frame.
The improvement of the technical program is that the described first circuit board frame inside is provided with the circuit that two electrodes of described capacitance component is electrically connected to described wiring board substrate.
The improvement of the technical program is that the described first circuit board frame inside is provided with the metal level of annular, and lug boss is provided with the plated-through hole of column.
The improvement of the technical program is that the described second circuit board frame inside is provided with the metal level of annular.
Owing to adopted technique scheme, a kind of miniature capacitance type microphone, comprise the wiring board substrate that electronic devices and components are installed, first circuit board frame of hollow, second circuit board frame and the base plate composition protection structure of hollow, the protection inside configuration is equipped with capacitance component, described first circuit board frame, second circuit board frame and base plate constitute a draw-in groove, and described capacitance component is installed in the described draw-in groove; This design has reduced part, has removed the elastic device with reliability hidden danger, can reach lower size, assembly technology simple, be convenient to automated production, production cost is low, product reliability good.
Description of drawings
Fig. 1 is the vertical view of the embodiment of the invention.
Fig. 2 is that the A-A of Fig. 1 is to generalized section.
Fig. 3 is that the B-B of Fig. 1 is to generalized section.
Fig. 4 is the vertical view of first circuit board frame of the embodiment of the invention.
Fig. 5 is that the A-A of Fig. 4 is to generalized section.
Fig. 6 is that the B-B of Fig. 4 is to generalized section.
Fig. 7 is the generalized section of second circuit board frame of the embodiment of the invention.
Embodiment
The vertical view of having represented present embodiment as Fig. 1; The A-A that Fig. 2 and Fig. 3 have represented Fig. 1 respectively to generalized section and B-B to generalized section; Fig. 4 is the vertical view of first circuit board frame of the embodiment of the invention; The A-A that Fig. 5 and Fig. 6 have represented Fig. 4 respectively to generalized section and B-B to generalized section; Fig. 7 is the generalized section of second circuit board frame of the embodiment of the invention.These patterns have been represented the product structure of the embodiment of the invention.
The external shape of the miniature capacitance type microphone that present embodiment provides is square; comprising that square wiring board substrate 1, first party shaped as frame circuit board frame 2, the second square frame circuit board frame 3 and a square wiring board base plate 4 combine forms the protection structure, and the protection inside configuration is equipped with capacitance component.The base material of wiring board is preferably the resin material of insulation.
Wiring board substrate 1 installed inside is useful on the amplifier 11 of amplification signal, and arranged outside has a plurality of pads 12 that are used to install miniature capacitance type microphone.
The peripheral frame 21 of first party shaped as frame circuit board frame 2 is square, and the inside holes general shape is square, and side is provided with the projection 23 towards the center within it, and projection 23 is two, and is symmetrically distributed in the inboard of described first circuit board frame 2; Inside at first circuit board frame 2 also is provided with metal level, and is concrete, and peripheral frame 21 inner surfaces are provided with the metal level 22 of annular, projection 23 inside are provided with the plated-through hole 24 of column, plated-through hole 24 is the through hole that an endless metal layer constitutes, and there is packing material 25 its inside.
The peripheral frame 31 of second party shaped as frame circuit board frame 3 is square, and the inside holes general shape is square, and also is provided with endless metal layer 32 in the inside of second circuit board frame 3, and metal level 32 inboards are provided with annular insulating barrier 33.
Square wiring board base plate 4 is provided with the sound hole 41 that is used to receive the external sound signal.
The Outside Dimensions of first circuit board frame 2 and second circuit board frame 3 and in-profile consistent size, but the projection 23 of first circuit board frame, 2 inboards protrudes in the inboard of second circuit board frame 3, thereby, first circuit board frame 2, second circuit board frame 3 and wiring board base plate 4 constitute a draw-in groove, and capacitance component is installed in the draw-in groove.
Capacitance component comprises fixed polar plate 5, vibrating diaphragm 6 and the spacer 7 that is arranged between the two constitutes, and wherein vibrating diaphragm 6, is sidelong near wiring board base plate 4 one and is put on becket 61 by predetermined fixed.
This product structure, capacitance component is by very firm remaining in the draw-in groove; Pole plate 5 is as an electrode of capacitance component, contacts with projection 23 on first circuit board frame 2, can be connected with wiring board substrate 1 realization circuit by plated-through hole 24; Vibrating diaphragm 6 is as another electrode of capacitance component, and the metal level 22 of the annular in the endless metal layer 32 that can pass through metal level (embodying among the figure), the second circuit board frame inside on becket 61, the wiring board base plate and first circuit board frame is connected with wiring board substrate 1 realization circuit.
The shape of obvious this each part of product structure is all comparatively regular, number of spare parts is few, and the part generation relatively moves in this structure space and possibility are all very little, this just can guarantee reliability of products, and assembly technology is simple, be easy to use automated production, enhance productivity; By simplifying the internal structure of product, can be so that the height of product and the area of plane can reduce significantly, and do not sacrifice the performance of product, can guarantee the needed product of better products performance inner space.
In the implementation case, draw-in groove utilizes the inboard projection that is provided with of first wiring board to realize, an electrode of capacitance component is electrically connected with the wiring board substrate by the plated-through hole in the inboard projection that is provided with of first wiring board, can increase to the full extent product inner chamber, reduce the parasitic capacitance of product, improve product sensitivity, improve acoustical behavior.
The inner endless metal layer that is provided with of first circuit board frame and second circuit board frame can guarantee anti-preferably electromagnetic interference effect.
Under above-mentioned instruction of the present invention; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; and these improvement and distortion; all drop in protection scope of the present invention; those skilled in the art should be understood that; above-mentioned specific descriptions are just better explained purpose of the present invention, and protection scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. miniature capacitance type microphone; it is characterized in that; comprise the wiring board substrate that electronic devices and components are installed, first circuit board frame of hollow, second circuit board frame and the base plate composition protection structure of hollow; the protection inside configuration is equipped with capacitance component; described first circuit board frame, second circuit board frame and base plate constitute a draw-in groove, and described capacitance component is installed in the described draw-in groove.
2. miniature capacitance type microphone as claimed in claim 1 is characterized in that the inboard of described first circuit board frame is provided with the projection towards the center, and described projection protrudes in the inboard of described second circuit board frame, and constitutes described draw-in groove with described base plate.
3. miniature capacitance type microphone as claimed in claim 2 is characterized in that described projection is symmetrically distributed in the inboard of described first circuit board frame.
4. as the described miniature capacitance type microphone of the arbitrary claim of claim 1-3, it is characterized in that the described first circuit board frame inside is provided with the circuit that two electrodes of described capacitance component is electrically connected to described wiring board substrate.
5. as the described miniature capacitance type microphone of the arbitrary claim of claim 2-3, it is characterized in that the described first circuit board frame inside is provided with the metal level of annular, lug boss is provided with the plated-through hole of column.
6. miniature capacitance type microphone as claimed in claim 5 is characterized in that, the described second circuit board frame inside is provided with the metal level of annular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101705152A CN102256199A (en) | 2010-10-12 | 2011-06-23 | Micro capacitance microphone |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020557809 | 2010-10-12 | ||
| CN201020557809.1 | 2010-10-12 | ||
| CN2011101705152A CN102256199A (en) | 2010-10-12 | 2011-06-23 | Micro capacitance microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102256199A true CN102256199A (en) | 2011-11-23 |
Family
ID=44983132
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202144540U Expired - Lifetime CN202135317U (en) | 2010-10-12 | 2011-06-23 | Miniature condenser microphone |
| CN2011101705152A Pending CN102256199A (en) | 2010-10-12 | 2011-06-23 | Micro capacitance microphone |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202144540U Expired - Lifetime CN202135317U (en) | 2010-10-12 | 2011-06-23 | Miniature condenser microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN202135317U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202135317U (en) * | 2010-10-12 | 2012-02-01 | 歌尔声学股份有限公司 | Miniature condenser microphone |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178447C (en) * | 2001-05-16 | 2004-12-01 | 株式会社西铁城电子 | Electret microphone |
| EP1505853A2 (en) * | 2003-08-05 | 2005-02-09 | Knowles Electronics, LLC | Electret condenser microphone |
| US20060285707A1 (en) * | 2005-06-20 | 2006-12-21 | Hosiden Corporation | Electro-acoustic transducer |
| CN201509311U (en) * | 2009-09-27 | 2010-06-16 | 歌尔声学股份有限公司 | Micro-capacitance type microphone |
| CN202135317U (en) * | 2010-10-12 | 2012-02-01 | 歌尔声学股份有限公司 | Miniature condenser microphone |
-
2011
- 2011-06-23 CN CN2011202144540U patent/CN202135317U/en not_active Expired - Lifetime
- 2011-06-23 CN CN2011101705152A patent/CN102256199A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178447C (en) * | 2001-05-16 | 2004-12-01 | 株式会社西铁城电子 | Electret microphone |
| EP1505853A2 (en) * | 2003-08-05 | 2005-02-09 | Knowles Electronics, LLC | Electret condenser microphone |
| US20060285707A1 (en) * | 2005-06-20 | 2006-12-21 | Hosiden Corporation | Electro-acoustic transducer |
| CN201509311U (en) * | 2009-09-27 | 2010-06-16 | 歌尔声学股份有限公司 | Micro-capacitance type microphone |
| CN202135317U (en) * | 2010-10-12 | 2012-02-01 | 歌尔声学股份有限公司 | Miniature condenser microphone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202135317U (en) | 2012-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111123 |