CN2829267Y - Double vibration diaphragm combined electret type condensor microphone - Google Patents
Double vibration diaphragm combined electret type condensor microphone Download PDFInfo
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- CN2829267Y CN2829267Y CN 200520064645 CN200520064645U CN2829267Y CN 2829267 Y CN2829267 Y CN 2829267Y CN 200520064645 CN200520064645 CN 200520064645 CN 200520064645 U CN200520064645 U CN 200520064645U CN 2829267 Y CN2829267 Y CN 2829267Y
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- transducing
- capacitive part
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Abstract
The utility model discloses a double vibration diaphragm combined electret type condenser microphone, which is composed of two unidirectional microphones with identical performances. Combined directionality can be changed among circle directionality, wide-heart-shaped directionality, single directionality, super-heart-shaped directionality, double directionality and super directionality by changing the relative polarity and the amplitudes of the two microphones under the coaxial condition. The utility model has the advantage of good consistency when the product is produced. A manufacturer can produce microphones by adopting the structure widely.
Description
Technical field
The utility model relates to a kind of microphone, particularly a kind of double diaphragm combination electret formula condenser microphone.
Background technology
Electret microphone is a kind of pre-polarization capacity formula microphone, and obtaining and setting of its directional property only adopted single diaphragm structure at present, preestablished the acoustics tank circuit, determines then by regulating acoustical parameter.Promptly beat sound hole etc. " hardware " and realize in that the back is set on the cavity on phase shift groove, damping layer, the wiring board.The directional property of the single microphone of prior art can only be selected between two-way from unidirectional, can not obtain better directive property.
Summary of the invention
At the problems referred to above, the purpose of this utility model is to provide a kind of result of use ideal, can produce the double diaphragm combination electret formula condenser microphone of more kinds of particular orientation.
The technical scheme that the utility model adopted is:
Double diaphragm combination electret formula condenser microphone, it comprises
Cylindrical portion and with the end sealing of one of above-mentioned cylindrical portions may and the metal shell that the front panel of entering tone mouth constitutes before having in the above;
Seal the double-sided wiring board at the above-mentioned metal shell back side; It is characterized in that:
Have entering tone mouth in back on the double-sided wiring board;
There is preceding electret transducing capacitive part upper end in the metal shell, there is back electret transducing capacitive part lower end in the metal shell, electret transducing capacitive part and the coaxial installation of back electret transducing capacitive part before described, the neighboring part of the front and back back pole plate of preceding electret transducing capacitive part and back electret transducing capacitive part is moulded the chamber by insulation it is carried out electric insulation/support, and preceding electret transducing capacitive part is partly connected or is connected in parallel with back electret transducing;
Be provided with impedance conversion device on double-sided wiring board, what the capacitance variations of described forward and backward electret transducing capacitive part obtained exports through impedance conversion device with the corresponding audio signal of input acoustic pressure.
In addition, can reach super directional property for making microphone of the present utility model, the cylindrical portion of metal shell has side entering tone mouth, and this side entering tone mouth connects to the sound intersection between preceding electret transducing capacitive part and the back electret transducing capacitive part.
The beneficial effects of the utility model are: because this product is made up of the microphone of two characteristic unanimities, satisfying under the coaxial mounted situation, by relative polarity and the amplitude that changes them, the directive property of being synthesized can change between super sensing in circle sensing, the shape sensing of feeling relieved, single sensing, super heart-shaped sensing, two sensing.High conformity during production, manufacturer can extensively adopt said structure to carry out the production of microphone.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is the structural representation of execution mode one of the present utility model;
Fig. 2 is the structure diagram of execution mode one;
Fig. 3 is the structural representation of execution mode two of the present utility model;
Fig. 4 is the structure diagram of execution mode two;
Fig. 5 is the structural representation of execution mode three of the present utility model;
Fig. 6 is the structure diagram of execution mode four;
Fig. 7 is the structural representation of execution mode four of the present utility model;
Fig. 8 is the structure diagram of execution mode four;
Fig. 9 is the outward appearance end view of microphone of the present utility model;
Figure 10 is the schematic diagram of execution mode one of the present utility model;
Figure 11 is that the MA and the MB of execution mode one, execution mode two synthesizes the directive property polar diagram with phase time;
Figure 12 is the MA of execution mode one, execution mode two and MB synthetic directive property polar diagram when anti-phase.
Embodiment
With reference to Fig. 1, Fig. 3, Fig. 5 and Fig. 7, double diaphragm composite type electric capacity microphone of the present utility model, it comprises
Cylindrical portion and with the end sealing of one of above-mentioned cylindrical portions may and the metal shell 2 that the front panel of entering tone mouth A constitutes before having in the above;
Seal the double-sided wiring board 15 at above-mentioned metal shell 2 back sides;
Have back entering tone mouth C on the double-sided wiring board 15;
There is preceding electret transducing capacitive part upper end in the metal shell 2, there is back electret transducing capacitive part lower end in the metal shell, electret transducing capacitive part and the coaxial installation of back electret transducing capacitive part before described, the neighboring part of the forward and backward back pole plate 6,10 of preceding electret transducing capacitive part and back electret transducing capacitive part is moulded chamber 7 by insulation it is carried out electric insulation/support, and preceding electret transducing capacitive part is partly connected or is connected in parallel with back electret transducing;
Be provided with impedance conversion device on double-sided wiring board 15, what the capacitance variations of described forward and backward electret transducing capacitive part obtained exports through impedance conversion device with the corresponding audio signal of input acoustic pressure.
In addition, the cylindrical portion of metal shell has side entering tone mouth, and this side entering tone mouth connects to the sound intersection between preceding electret transducing capacitive part and the back electret transducing capacitive part.
Electret transducing capacitive part and back electret transducing capacitive part are installed with axial symmetry before described.
Electret transducing capacitive part and the coaxial installation in the same way of back electret transducing capacitive part before described.
Electret transducing capacitive part partly is connected to impedance conversion device with back electret transducing before described.
Electret transducing capacitive part partly is connected in parallel to impedance conversion device with back electret transducing before described.
Microphone of the present utility model has numerous embodiments, wherein,
With reference to Fig. 1, Fig. 2, as preferred implementation one, should before electret transducing capacitive part comprise entering tone mouth A before the correspondence preceding vibrating diaphragm 4 and, by the preceding back pole plate 6 of a spacing body (packing ring 5 before being illustrated in figure 1 as) with described preceding vibrating diaphragm 4 positioned opposite, preceding vibrating diaphragm 4 or preceding back pole plate 6 are provided with the electret film of polarization in advance, be useful on the electroconductive component (being illustrated in figure 1 as toe-out zona 3) of the peripheral part of fixing preceding vibrating diaphragm 4 in the metal shell 2, this electroconductive component ground connection promptly connects metal shell 2; There is back electret transducing capacitive part lower end in the metal shell 2, this back electret transducing capacitive part comprises the back vibrating diaphragm 12 of a corresponding back entering tone mouth C, and by the back back pole plate 10 of a spacing body (as shown being back packing ring 11) with described back vibrating diaphragm 12 positioned opposite, back vibrating diaphragm 12 or back back pole plate 10 are provided with the electret film of polarization in advance, are useful on the electroconductive component (being illustrated in figure 1 as posttension zona 13) of the peripheral part of fixing back vibrating diaphragm 12 in the metal shell 2; The neighboring part of the front and back back pole plate 6,10 of described preceding electret transducing capacitive part and back electret transducing capacitive part is moulded chamber 7 by insulation it is carried out electric insulation/support; The preceding back pole plate 6 of preceding electret transducing capacitive part is electrically connected with the back back pole plate 10 of cartridge, and a shared micropore acoustic damping material piece 9 is arranged between the two; On double-sided wiring board 15, be provided with impedance conversion device, what the capacitance variations of described forward and backward electret transducing capacitive part obtained exports through impedance conversion device 16 with the corresponding audio signal of input acoustic pressure, the G utmost point of this impedance conversion device connects the electroconductive component (posttension zona 13) with the peripheral part that is used for fixing back vibrating diaphragm 12, and its output is connected with the solder joint 17 in double-sided wiring board 15 outsides.
In addition, the cylindrical portion of metal shell 2 has side entering tone mouth B, and this side entering tone mouth B connects to micropore acoustic damping material piece 9.
Be electrically connected by the metal connecting ring 8 that is enclosed within on the micropore acoustic damping material piece 9 between the back back pole plate 10 of preceding back pole plate 6 and the cartridge of electret transducing capacitive part before described.
Described with the end sealing of one of above-mentioned cylindrical portions may and before having in the above the front panel of entering tone mouth A be provided with dustcloth 1.
The edge, upper surface of double-sided wiring board 15 is printed with the conductive copper 19 that is connected with impedance conversion device 16, the electroconductive component (posttension zona 13) that is used for fixing the peripheral part of back vibrating diaphragm 12 electrically contacts by conducting ring 14 and conductive copper 19, thereby impedance conversion device 16 is electrically connected with electroconductive component (posttension zona 13).
Below the structural principle of preferred implementation one of the present utility model is analyzed as follows
With reference to Fig. 2, Figure 10, obviously, as shown in Figure 2, combined microphone is made up of the heart-shaped directional microphone of two characteristic unanimities, and for ease of analyzing, with dashed lines is divided into MB and MA with M, and first half is MB, and latter half is MA; Wherein VB, VA are corresponding polarizing voltage, with reference to Figure 11, are VB, the VA polar diagram (the single sensing → full the sensing) with the synthetic directive property of phase time MB, MA, with reference to Figure 12, be VB, the polar diagram (single point to → 8 fonts point to) of synthetic directive property when VA is anti-phase.
As shown in figure 11, be the same phase time of VB, VA, the situation of the directive property that the amplitude of change VB is synthetic, EB, EA are respectively the output voltages of MB, MA among the figure, EB ' is the output voltage of EB by EB after the polarizing voltage that lowers EB.MB, MA install with axial symmetry, so directional property is shown in solid line among the figure.So when getting two microphone EA+EB ', under the situation of EA+EB, become the circular directional property shown in the dotted line among the figure, under the situation of EA+EB/3, become the relieved shape characteristic shown in the chain-dotted line, again when EB=0, have only EA and become single directional property, that is to say, change the ratio of EB and EA during two microphone homopolarities, can make directive property point to, feel relieved and change between sensing and single the sensing at circle.
As shown in figure 12, for VB, when VA is anti-phase, change the amplitude of VB, the situation during EA-EB '.This moment, the synthetic directive property of microphone can change between single sensing, super heart-shaped sensing and two the sensing.
Therefore, in design electret formula capacitor microphone, under the prerequisite that meets with axial symmetry,, then can obtain any one directional property from full sensing → 8 fonts point to by changing polarity and the amplitude of microphone VB.Realized the directivity setting of electret formula capacitor microphone.
Under the prerequisite that satisfies with axial symmetry, as three entering tone mouths of side before and after having simultaneously, the combination of two microphones, by changing their relative polarities and amplitude, variation between shape sensing, single sensing, super heart-shaped sensing and two the sensing can be pointed to → feel relieved to the directional property of being synthesized in circle, until super sensing.Point out that especially when if the combination of two microphones does not have the 3rd entering tone mouth, the sharp-pointed degree of directive property can only reach super heart-shaped sensing, if when having side entering tone mouth, then sharp-pointed degree can reach super directional property.
More than for adopting two modes that microphone is connected in series with axial symmetry in the invention, certainly, except preceding electret transducing capacitive part and back electret transducing capacitive part are adopted the mode that is connected in series, can also adopt the mode of being parallel-connected to, as reference Fig. 3, Fig. 4, preferred implementation two of the present utility model, double diaphragm combination electret formula condenser microphone, it comprises cylindrical portion and one of above-mentioned cylindrical portions may end is sealed and has the metal shell 2 of the front panel formation of preceding entering tone mouth A in the above; Seal the double-sided wiring board 15 at above-mentioned metal shell 2 back sides; Have back entering tone mouth C on the double-sided wiring board 15; There is preceding electret transducing capacitive part upper end in the metal shell 2, electret transducing capacitive part comprises the preceding vibrating diaphragm 4 of the preceding entering tone mouth A of a correspondence and passes through a spacing body (preceding packing ring 5) and the preceding back pole plate 6 of described preceding vibrating diaphragm 4 positioned opposite before being somebody's turn to do, preceding vibrating diaphragm 4 or preceding back pole plate 6 are provided with the electret film of polarization in advance, be useful on the electroconductive component (toe-out zona 3) of the peripheral part of fixing preceding vibrating diaphragm 4 in the metal shell 2, this electroconductive component ground connection promptly can be adopted the mode that connects metal shell 2; There is back electret transducing capacitive part lower end in the metal shell 2, this back electret transducing capacitive part comprises the back vibrating diaphragm 12 of a corresponding back entering tone mouth C and passes through a spacing body and the back back pole plate 10 of described back vibrating diaphragm 12 positioned opposite, back vibrating diaphragm 12 or back back pole plate 10 are provided with the electret film of polarization in advance, be useful on the electroconductive component (as posttension zona 13) of the peripheral part of fixing back vibrating diaphragm 12 in the metal shell 2, different with series system is: this electroconductive component (posttension zona 13) ground connection promptly connects metal shell 2; The neighboring part of the front and back back pole plate 6,10 of described preceding electret transducing capacitive part and back electret transducing capacitive part is moulded chamber 7 by insulation it is carried out electric insulation/support; The preceding back pole plate 6 of preceding electret transducing capacitive part is electrically connected with the back back pole plate 10 of cartridge, and is separated with micropore acoustic damping material piece 9 between the two; On double-sided wiring board 15, be provided with impedance conversion device 16, what the capacitance variations of described forward and backward electret transducing capacitive part obtained exports through impedance conversion device 16 with the corresponding audio signal of input acoustic pressure, different with series system is: the electrical connection common port before the G utmost point of this impedance conversion device 16 connects between the back back pole plate 10 of the preceding back pole plate 6 of electret transducing capacitive part and back electret transducing capacitive part, the output of impedance conversion device connects the solder joint 17 of double-sided wiring board 15.
Equally, identical with series system, the cylindrical portion of metal shell 2 can have side entering tone mouth B, and this side entering tone mouth B connects to micropore acoustic damping material piece 9.In addition, be electrically connected by the metal connecting ring 8 that is enclosed within on the micropore acoustic damping material piece 9 between the back back pole plate 10 of the preceding back pole plate 6 of electret transducing capacitive part and cartridge before described.Described with the end sealing of one of above-mentioned cylindrical portions may and before having in the above the front panel of entering tone mouth A be provided with dustcloth 1.
In addition, owing to adopted the mode of being connected in parallel, so, as a kind of embodiment wherein, described impedance conversion device by electric connection line 18 and the preceding back pole plate 6 of preceding electret transducing capacitive part and afterwards the electrical connection common port between the back back pole plate 10 of electret transducing capacitive part be connected.
In addition, except above tell about forward and backward electret transducing capacitive part is installed with axial symmetry, this two transducings capacitive part can also coaxially be installed in the same way, equally, two transducing capacitive part of coaxial mode of installing in the same way can be for being connected in series or being connected in parallel, by relative polarity and the amplitude that changes them, the directive property of being synthesized can change between super sensing in circle sensing, the shape sensing of feeling relieved, single sensing, super heart-shaped sensing, two sensing equally.
With reference to Fig. 5, Fig. 6, under coaxial situation of installing in the same way, preceding electret transducing capacitive part is connected in series with back electret transducing capacitive part, it is with the structure difference of installing with axial symmetry: the micropore acoustic damping material piece 9 ' of preceding electret transducing capacitive part is by the 8 ' supporting of metal connecting ring, the micropore acoustic damping material piece 9 of back electret transducing capacitive part " by metal connecting ring 8 " supporting, back pole plate 6 before the top of this metal connecting ring 8 ' connects, the bottom connects the posttension zona 13 of back electret transducing capacitive part, and the back back pole plate 10 of back electret transducing capacitive part is by metal connecting ring 8 " be electrically connected to impedance conversion device 16.
In addition, with reference to Fig. 7, Fig. 8, under coaxial situation of installing in the same way, preceding electret transducing capacitive part is connected in parallel with back electret transducing capacitive part, it is with the coaxial structure difference that in the same way, is connected in series: the metal connecting ring 8 ' of preceding electret transducing capacitive part and opening between the zona 13 of back electret transducing capacitive part intercept by insulated ring 20, this metal connecting ring 8 ' by lead 21 with after the metal connecting ring 8 of electret transducing capacitive part " be electrically connected to impedance conversion device 16 after being connected.
Certainly, the invention is except above-mentioned execution mode, and other equivalent technical solutions also should be within protection range of the present utility model.
Claims (8)
1, double diaphragm combination electret formula condenser microphone, it comprises
Cylindrical portion and with the end sealing of one of above-mentioned cylindrical portions may and the metal shell that the front panel of entering tone mouth constitutes before having in the above;
Seal the double-sided wiring board at the above-mentioned metal shell back side; It is characterized in that:
Have entering tone mouth in back on the double-sided wiring board;
There is preceding electret transducing capacitive part upper end in the metal shell, there is back electret transducing capacitive part lower end in the metal shell, electret transducing capacitive part and the coaxial installation of back electret transducing capacitive part before described, the neighboring part of the front and back back pole plate of preceding electret transducing capacitive part and back electret transducing capacitive part is moulded the chamber by insulation it is carried out electric insulation/support, and preceding electret transducing capacitive part is partly connected or is connected in parallel with back electret transducing;
Be provided with impedance conversion device on double-sided wiring board, what the capacitance variations of described forward and backward electret transducing capacitive part obtained exports through impedance conversion device with the corresponding audio signal of input acoustic pressure.
2, according to the described double diaphragm combination of claim 1 electret formula condenser microphone, it is characterized in that: the cylindrical portion of metal shell has side entering tone mouth, and this side entering tone mouth connects to the sound intersection between preceding electret transducing capacitive part and the back electret transducing capacitive part.
3, according to the described double diaphragm combination of claim 1 electret formula condenser microphone, it is characterized in that: electret transducing capacitive part and back electret transducing capacitive part are installed with axial symmetry before described.
4, double diaphragm combination electret formula condenser microphone according to claim 1 is characterized in that: electret transducing capacitive part and the coaxial installation in the same way of back electret transducing capacitive part before described.
5, double diaphragm combination electret formula condenser microphone according to claim 1, it is characterized in that: electret transducing capacitive part partly is connected to impedance conversion device with back electret transducing before described.
6, double diaphragm combination electret formula condenser microphone according to claim 1, it is characterized in that: electret transducing capacitive part partly is connected in parallel to impedance conversion device with back electret transducing before described.
7, according to claim 1,2,3,4,5 or 6 described double diaphragm combination electret formula condenser microphones, it is characterized in that: electret transducing capacitive part comprises the preceding vibrating diaphragm of the preceding entering tone mouth of a correspondence and passes through a spacing body and the preceding back pole plate of described preceding vibrating diaphragm positioned opposite before described, preceding vibrating diaphragm or preceding back pole plate are provided with the electret film of polarization in advance, be useful on the electroconductive component of the peripheral part of fixing preceding vibrating diaphragm in the metal shell, this electroconductive component ground connection, a side of preceding back pole plate has micropore acoustic damping material piece;
Described back electret transducing capacitive part comprises the back vibrating diaphragm of a corresponding back entering tone mouth and passes through a spacing body and the back back pole plate of described back vibrating diaphragm positioned opposite, back vibrating diaphragm or back back pole plate are provided with the electret film of polarization in advance, be useful on the electroconductive component of the peripheral part of fixing back vibrating diaphragm in the metal shell, a side of back back pole plate has micropore acoustic damping material piece.
8, double diaphragm combination electret formula condenser microphone according to claim 7, it is characterized in that: described micropore acoustic damping material piece is installed and fixed by the metal connecting ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064645 CN2829267Y (en) | 2005-09-15 | 2005-09-15 | Double vibration diaphragm combined electret type condensor microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064645 CN2829267Y (en) | 2005-09-15 | 2005-09-15 | Double vibration diaphragm combined electret type condensor microphone |
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| Publication Number | Publication Date |
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| CN2829267Y true CN2829267Y (en) | 2006-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520064645 Expired - Fee Related CN2829267Y (en) | 2005-09-15 | 2005-09-15 | Double vibration diaphragm combined electret type condensor microphone |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101754078A (en) * | 2008-12-12 | 2010-06-23 | 志丰电子股份有限公司 | Electret back-electrode double diaphragm electroacoustic actuator and manufacturing method thereof |
| WO2010135925A1 (en) * | 2009-05-26 | 2010-12-02 | Industrial Technology Research Institute | Flat speaker unit and sperker device therwith |
| CN101080109B (en) * | 2007-06-14 | 2011-12-07 | 宁波鑫丰泰电器有限公司 | Front pole capacitance microphone |
| CN101437188B (en) * | 2007-10-01 | 2012-08-29 | 财团法人工业技术研究院 | Acoustic transducer and microphone using the same |
| US8369545B2 (en) | 2008-12-31 | 2013-02-05 | Htc Corporation | Flexible luminescent electro-acoustic transducer and electronic device using the same |
| US8391520B2 (en) | 2008-10-24 | 2013-03-05 | Industrial Technology Research Institute | Flat speaker unit and speaker device therewith |
| US8411882B2 (en) | 2008-10-31 | 2013-04-02 | Htc Corporation | Electronic device with electret electro-acoustic transducer |
| CN101742388B (en) * | 2008-11-10 | 2013-07-31 | 宏达国际电子股份有限公司 | Electronic device with electret electroacoustic transducer |
| CN106612485A (en) * | 2015-10-23 | 2017-05-03 | 钰太芯微电子科技（上海）有限公司 | MEMS microphone and sound receiving device |
| CN106937229A (en) * | 2015-12-31 | 2017-07-07 | 北京塞宾科技有限公司 | A kind of condenser type voice collection device and microphone |
| US11558695B2 (en) | 2020-03-31 | 2023-01-17 | Shure Acquisition Holdings, Inc. | Condenser microphone pattern adjustment |
-
2005
- 2005-09-15 CN CN 200520064645 patent/CN2829267Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101080109B (en) * | 2007-06-14 | 2011-12-07 | 宁波鑫丰泰电器有限公司 | Front pole capacitance microphone |
| CN101437188B (en) * | 2007-10-01 | 2012-08-29 | 财团法人工业技术研究院 | Acoustic transducer and microphone using the same |
| US8391520B2 (en) | 2008-10-24 | 2013-03-05 | Industrial Technology Research Institute | Flat speaker unit and speaker device therewith |
| US8411882B2 (en) | 2008-10-31 | 2013-04-02 | Htc Corporation | Electronic device with electret electro-acoustic transducer |
| CN101742388B (en) * | 2008-11-10 | 2013-07-31 | 宏达国际电子股份有限公司 | Electronic device with electret electroacoustic transducer |
| CN101754078A (en) * | 2008-12-12 | 2010-06-23 | 志丰电子股份有限公司 | Electret back-electrode double diaphragm electroacoustic actuator and manufacturing method thereof |
| US8369545B2 (en) | 2008-12-31 | 2013-02-05 | Htc Corporation | Flexible luminescent electro-acoustic transducer and electronic device using the same |
| WO2010135925A1 (en) * | 2009-05-26 | 2010-12-02 | Industrial Technology Research Institute | Flat speaker unit and sperker device therwith |
| CN106612485A (en) * | 2015-10-23 | 2017-05-03 | 钰太芯微电子科技（上海）有限公司 | MEMS microphone and sound receiving device |
| CN106612485B (en) * | 2015-10-23 | 2024-03-29 | 钰太芯微电子科技（上海）有限公司 | MEMS microphone and radio device |
| CN106937229A (en) * | 2015-12-31 | 2017-07-07 | 北京塞宾科技有限公司 | A kind of condenser type voice collection device and microphone |
| US11558695B2 (en) | 2020-03-31 | 2023-01-17 | Shure Acquisition Holdings, Inc. | Condenser microphone pattern adjustment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061018 Termination date: 20130915 |