CN201234332Y - Full-shielding type miniature microphone - Google Patents
Full-shielding type miniature microphone Download PDFInfo
- Publication number
- CN201234332Y CN201234332Y CNU2008200212077U CN200820021207U CN201234332Y CN 201234332 Y CN201234332 Y CN 201234332Y CN U2008200212077 U CNU2008200212077 U CN U2008200212077U CN 200820021207 U CN200820021207 U CN 200820021207U CN 201234332 Y CN201234332 Y CN 201234332Y
- Authority
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- China
- Prior art keywords
- mini microphone
- radome
- shield
- microphone unit
- full
- 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
- 239000000463 material Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 16
- 238000009434 installation Methods 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The utility model discloses a fully shielded micro-microphone, which comprises a micro-microphone unit and an electronically-conductive shield cover installed on the outer side of the micro-microphone unit. The micro-microphone unit comprises a protection structure composed of an electronically-conductive casing and a circuit board, and an electrical connection device is arranged between the shield cover and the protection structure. The fully shielded micro-microphone shields the micro-microphone unit through the electronically-conductive shield cover, and the shield cover is connectd with the protection structure, so as to reduce contact resistance through the electrical connection device. The fully shielded micro-microphone has simple structure and low cost, and can achieve good anti-electromagnetic interference effect, so that the micro-microphone with an anti-electromagnetic interference function can be easily designed according to the actual demand.
Description
Technical field
The utility model relates to a kind of mini microphone, is not easy to be subjected to the interference of external electromagnetic signal, guarantees that the voice signal transmission is clear, and shield effectiveness is good.
Background technology
In recent years; a large amount of mini microphones is applied in the electronic products such as mobile phone, notebook in order to receive the external sound signal; general mini microphone structure adopts an external conductive casing and a wiring board to form protection, shielding space, the sound-electrical switching device of inner installation.In this microphone structure, shell generally adopts metal material, and its main purpose is to reach anti-preferably electromagnetic interference effect, and the while wiring board generally need be provided with Copper Foil at two surface large areas and reach anti-electromagnetic interference effect.But along with the electromagnetic environment that electronic product faced becomes increasingly complex, original structure can not well satisfy the desired anti-electromagnetic interference effect of electronic product, and, it also is the mode that comparatively expends cost that the wiring board large tracts of land is provided with Copper Foil, has brought very big difficulty also for the circuit design of wiring board.
The utility model content
Technical problem to be solved in the utility model provides a kind of simple in structure, with low cost, and can reach the full-shield mini microphone of good anti-electromagnetic interference effect.
For solving the problems of the technologies described above; the technical solution of the utility model is: the full-shield mini microphone; comprise at least one mini microphone unit; be installed in the electrically conductive shield in the outside, described mini microphone unit; described mini microphone unit comprises the protection structure of being made up of external conductive casing and wiring board, is provided with conductive connecting device between described radome and the protection structure.By electrically conductive shield shielding mini microphone unit, and connect by conductive connecting device between radome and the mini microphone unit, reduce contact resistance, not only simple in structure, with low cost, and can reach good anti-electromagnetic interference effect.
The improvement of the technical program is: described radome is the cannon tube shield that aluminium, copper or alloy material are made, and perhaps nonmetallic materials are coated with the cannon tube shield that is coated with metal screen layer.The realization of radome can have multiple mode, and preferred conductive effect is good, the metallic shield or the nonmetal radome that the coat of metal is set of easy manufacturing.
The further improvement of the technical program is: described radome is positioned at the end extension of described wiring board and grows described wiring board, perhaps described radome is positioned at the end sealing of described wiring board, and the electrode of drawing described mini microphone unit on the described wiring board passes by the opening of described radome.The shape of radome and and the mini microphone unit be combined with multiple mode, the mode of this improvement project has shield effectiveness preferably.
The further improvement of the technical program is: described conductive connecting device is arranged on salient point or the convex annular looping or the vertical bar shape projection of described radome inboard.The shape of conductive connecting device can have multiple, the simplicity of design of this improvement project, with low cost.Being provided with of conductive connecting device can be accomplished in several ways, and this improvement project is arranged on the radome inboard, do not need to improve the mini microphone unit, more or less freely realization.
Another kind of further improvement of the technical program is: described radome is the elastic metallic cover, the side that described mini microphone unit is installed has otch, and cross tight fit with described mini microphone unit, form described conductive connecting device thereby clamp described mini microphone unit.
Another of the technical program further improved and be: described conductive connecting device is arranged on salient point or the convex annular looping or the vertical bar shape projection in the described mini microphone cell enclosure outside.In this improvement project conductive connecting device be arranged on the mini microphone cell enclosure outside, can reach same effect.
Another of the technical program further improved and be: described conductive connecting device is arranged on shell or the solder joint between the wiring board or the conducting resinl tie point of described radome inboard and described mini microphone unit.In this improvement project conductive connecting device be set to additionally replenish pad or conduction bonding, conductive effect is better, and can improve the mechanical stability between radome inboard and the mini microphone unit.
Improvement of the technical scheme is: described radome inboard is provided with positioning convex and is used to locate described mini microphone unit.The design of the inboard positioning convex of radome can be so that the mechanical stability between radome inboard and the mini microphone unit improves, and conductive effect is better.
Further improvement in the technical proposal is: described radome is the radome that board-like material or Web materials are made.According to the acoustics needs of reality and the needs of shield effectiveness, can carry out multiple improvement to radome.
The further improvement of technique scheme is: the shape of described radome is consistent with the shape of described mini microphone unit, can be square, circular or other shapes.The flat shape of radome is consistent with the flat shape of mini microphone unit, thereby cooperates closely, and is general preferred commonly used square or circular.
In the technical program, can adopt the mini microphone unit of various ways, for example electret formula, condenser type, can adopt general structure, also can adopt the MEMS microphone structure, the electrode of mini microphone unit can pass radome by the solder joint on the wiring board, bonding wire, FPCB (Flexible Printed Circuit) connection.
Owing to adopt technique scheme, the full-shield mini microphone, comprise at least one mini microphone unit, be installed in the electrically conductive shield in the outside, described mini microphone unit, described mini microphone unit comprises the protection structure of being made up of external conductive casing and wiring board, is provided with conductive connecting device between described radome and the protection structure; The utility model is by electrically conductive shield shielding mini microphone unit, and connect by conductive connecting device between radome and the mini microphone unit, reduce contact resistance, not only simple in structure, with low cost, and can reach good anti-electromagnetic interference effect, can design needed anti-electromagnetic interference mini microphone according to the actual requirements at an easy rate.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the upward view of radome among the utility model embodiment one;
Fig. 3 is the structural representation of the utility model embodiment two;
Fig. 4 is the upward view of radome among the utility model embodiment two;
Fig. 5 is the structural representation of the utility model embodiment three;
Fig. 6 is the upward view of radome among the utility model embodiment three;
Fig. 7 is the structural representation of the utility model embodiment four;
Fig. 8 is the structural representation of the utility model embodiment five;
Fig. 9 is the structural representation of the utility model embodiment six;
Figure 10 is the schematic perspective view of the utility model embodiment six radomes.
Among the figure: 1. mini microphone unit; 11. mini microphone cell enclosure; 12. sound hole, mini microphone unit; 13. mini microphone unit line plate; 14. mini microphone unit bonding wire; 2. radome; 21. shield sidewall; 22. radome shielding end; 23. radome fairlead; 24. conductive connecting device; 25. positioning convex.
Embodiment
Embodiment one: Fig. 1 is the structural representation of the implementation case, and the full-shield mini microphone comprises a columniform mini microphone unit 1 and an electrically conductive shield 2 that is installed in mini microphone unit 1.Mini microphone unit 1 is a miniature capacitance type microphone unit, its external structure comprises a metal shell 11 and a wiring board 13, inside is equipped with the capacitor of realization sound-electric translation function, shell 11 bottoms are provided with hole 12 and are used to receive the external sound signal, and wiring board 13 outsides are provided with the bonding wire 14 that is used for the signal of telecommunication transmission of microphone unit 1 generation; Radome 2 is cannon tube shields that aluminum is made, comprise sidewall sections 21 and masked segment 22, microphone unit 1 is packed in the sidewall sections 21, and masked segment 22 is a lid that not exclusively covers microphone unit 1, leaves the layout that opening 23 can be used for bonding wire 14 above; As shown in Figures 1 and 2, shield sidewall part 21 be provided with two between the shell 11 of the salient point 24 of inboard and microphone unit 1 in conjunction with closely, form conductive connecting device.
The full-shield mini microphone of the implementation case structure, do not need the special anti-electromagnetic interference function design of on the wiring board of capacitance type minitype microphone unit, carrying out, and the radome that aluminum metallic material is made making is simple, cheap, and can reach good anti-electromagnetic interference effect; And connect by conductive connecting device between radome and the microphone unit, reduced contact resistance, anti-electromagnetic interference better effects if, machinery assembling cooperation also is more prone to, and does not need tighter tolerance fit.
Embodiment two: Fig. 3 represents the structural representation of embodiment two, and Fig. 4 is the upward view of radome in the present embodiment.Than embodiment one, the difference of the implementation case is the implementation difference of conductive connecting device, and radome 2 inboards of present case are provided with three strip vertical bar muscle 24 as conductive connecting device, can reach the effect that is similar to case study on implementation one.
Embodiment three: Fig. 5 represents the structural representation of embodiment three, and Fig. 6 is the upward view of radome among the embodiment three.Than embodiment one, the difference of the implementation case has 2 points, and the one, the implementation difference of conductive connecting device, radome 2 inboards of present case are provided with an annular protrusion 24 as conductive connecting device, can reach the effect that is similar to case study on implementation one; The 2nd, a ring-shaped step 25 is set in the bottom side of radome 2 is used to limit the installation site of microphone unit 1 as positioning convex, can improve its mechanical structure stability.
Embodiment four: be the structural representation of embodiment four as Fig. 7, than case study on implementation one, the difference of the implementation case is the pattern difference of radome 2, the masked segment 22 of the implementation case radome 2 does not adopt semi-enclosed pattern, but adopt tubular pattern unanimous between the higher and lower levels, but masked segment 22 will grow microphone unit 1, thereby can carry out electromagnetic shielding to microphone unit.The full-shield mini microphone cost of this pattern is cheaper, and the part cost of manufacture is lower.
Embodiment five: the implementation case makes improvements on the basis of case study on implementation four: Fig. 8 is the structural representation of present embodiment.The highly higher annular protrusion 25 of one circle is set on radome 2, and the inside diameter of projection 25 is less than the outer dia of microphone unit 1, thereby the installation site of microphone unit 1 is defined.
Embodiment six: the implementation case is made the structural representation that change: Fig. 9 is a present embodiment on the basis of case study on implementation four.The inboard of radome 2 bonds together by conducting resinl and microphone unit 1, thereby the installation site of microphone unit 1 is defined, and has reduced contact resistance, does not need extra structural design.
Embodiment seven: the formation difference of the implementation case conductive connecting device in above-mentioned case study on implementation: Figure 10 is the schematic perspective view of present embodiment radome 2.Radome 2 is the elastic metallic cover, a side or whole radome that the mini microphone unit is installed have otch 26 up and down, tight fit is crossed in radome and mini microphone unit, thereby after the mini microphone unit is installed, clamp and form described conductive connecting device, simplicity of design, contact resistance reduce, and mechanical engagement is tight.
In the listed case study on implementation of this explanation, all adopted flat shape for circular radome and mini microphone unit, in fact, can adopt square other shapes that waits; Can adopt the mini microphone unit of various ways, for example electret formula, condenser type; Can adopt general structure, also can adopt the MEMS microphone structure, the electrode of mini microphone unit can pass radome by the solder joint on the wiring board, bonding wire, FPCB (Flexible Printed Circuit) connection; This structure can be applied in the microphone unit of monomer, also can be applied in the array microphone structure, does not violate the purport of this patent, can reach approximate effect.
Claims (10)
1. full-shield mini microphone; comprise at least one mini microphone unit; be installed in the electrically conductive shield in the outside, described mini microphone unit; described mini microphone unit comprises the protection structure of being made up of external conductive casing and wiring board, it is characterized in that: be provided with conductive connecting device between described radome and the protection structure.
2. full-shield mini microphone according to claim 1 is characterized in that: described radome is the cannon tube shield that aluminium, copper or alloy material are made, and perhaps nonmetallic materials are coated with the cannon tube shield that is coated with metal screen layer.
3. full-shield mini microphone according to claim 2, it is characterized in that: described radome is positioned at the end extension of described wiring board and grows described wiring board, perhaps described radome is positioned at the end sealing of described wiring board, and the electrode of drawing described mini microphone unit on the described wiring board passes by the opening of described radome.
4. full-shield mini microphone according to claim 3 is characterized in that: described conductive connecting device is arranged on salient point or the convex annular looping or the vertical bar shape projection of described radome inboard.
5. full-shield mini microphone according to claim 2, it is characterized in that: described radome is the elastic metallic cover, the side that described mini microphone unit is installed has otch, and cross tight fit with described mini microphone unit, form described conductive connecting device thereby clamp described mini microphone unit.
6. full-shield mini microphone according to claim 2 is characterized in that: described conductive connecting device is arranged on salient point or the convex annular looping or the vertical bar shape projection in the described mini microphone cell enclosure outside.
7. full-shield mini microphone according to claim 2 is characterized in that: described conductive connecting device is arranged on shell or the solder joint between the wiring board or the conducting resinl tie point of described radome inboard and described mini microphone unit.
8. according to the described full-shield mini microphone of the arbitrary claim of claim 1-7, it is characterized in that: described radome inboard is provided with positioning convex and is used to locate described mini microphone unit.
9. full-shield mini microphone according to claim 8 is characterized in that: described radome is the radome that board-like material or Web materials are made.
10. full-shield mini microphone according to claim 9 is characterized in that: the shape of described radome is consistent with the shape of described mini microphone unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200212077U CN201234332Y (en) | 2008-04-19 | 2008-04-19 | Full-shielding type miniature microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200212077U CN201234332Y (en) | 2008-04-19 | 2008-04-19 | Full-shielding type miniature microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201234332Y true CN201234332Y (en) | 2009-05-06 |
Family
ID=40620719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200212077U Expired - Lifetime CN201234332Y (en) | 2008-04-19 | 2008-04-19 | Full-shielding type miniature microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201234332Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395259A (en) * | 2011-10-19 | 2012-03-28 | 华为终端有限公司 | Structure for preventing electronic element from interference and mobile terminal |
| CN108141995A (en) * | 2015-12-16 | 2018-06-08 | 阿莫泰克有限公司 | The connector integrated structure of electronic equipment and with its portable electronic device |
| CN110856063A (en) * | 2019-10-29 | 2020-02-28 | 歌尔科技有限公司 | Microphone electrostatic protection structure and electronic equipment |
| CN110944277A (en) * | 2018-09-25 | 2020-03-31 | 英飞凌科技股份有限公司 | Device for suppressing interference radiation |
-
2008
- 2008-04-19 CN CNU2008200212077U patent/CN201234332Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395259A (en) * | 2011-10-19 | 2012-03-28 | 华为终端有限公司 | Structure for preventing electronic element from interference and mobile terminal |
| CN108141995A (en) * | 2015-12-16 | 2018-06-08 | 阿莫泰克有限公司 | The connector integrated structure of electronic equipment and with its portable electronic device |
| CN108141995B (en) * | 2015-12-16 | 2019-11-08 | 阿莫泰克有限公司 | Connector combination structure of electronic equipment and portable electronic device having same |
| CN110944277A (en) * | 2018-09-25 | 2020-03-31 | 英飞凌科技股份有限公司 | Device for suppressing interference radiation |
| CN110944277B (en) * | 2018-09-25 | 2022-12-23 | 英飞凌科技股份有限公司 | Devices for suppressing interference radiation |
| CN110856063A (en) * | 2019-10-29 | 2020-02-28 | 歌尔科技有限公司 | Microphone electrostatic protection structure and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090506 |