EP1843625B1 - Microphone blindé pour un dispositif de communication mobile - Google Patents
Microphone blindé pour un dispositif de communication mobile Download PDFInfo
- Publication number
- EP1843625B1 EP1843625B1 EP06112357A EP06112357A EP1843625B1 EP 1843625 B1 EP1843625 B1 EP 1843625B1 EP 06112357 A EP06112357 A EP 06112357A EP 06112357 A EP06112357 A EP 06112357A EP 1843625 B1 EP1843625 B1 EP 1843625B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microphone
- circuit board
- separator
- shielding
- electromagnetic shield
- 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.)
- Active
Links
- 238000010295 mobile communication Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 16
- 239000012777 electrically insulating material Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/04—Structural association of microphone with electric circuitry therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
Definitions
- Mobile, handheld communications devices typically contain a miniature microphone such as an electret condenser microphone.
- the microphone is typically held against a printed circuit board and electrically connects to the circuit board via a pair of small coil springs.
- Such devices also typically have an antenna in close proximity to the microphone with the attendant possibility that the microphone can undesirably pick up, as noise, electromagnetic energy radiated by the antenna. In the case of mobile telephones, this undesirable noise is sometimes referred to in the industry as "GSM buzz".
- GSM buzz To shield the microphone against such noise pick-up, a grounded shield (hereinafter alternatively referred to as an “electromagnetic shield”) is typically used to surround or enclose the microphone so as to isolate the microphone, electromagnetically, from such radiation.
- a number of parts are stacked together and enclosed in a housing.
- the stack of parts must, when fully assembled, occupy the space defined by the housing of the device.
- the variability in the size of the parts in the stack and their proper placement during assembly requires that tolerances be factored into the design of the stack of parts.
- the pressure between the various parts in the stack ultimately depends upon the aggregate size of the parts made to occupy the well-defined space. As excess pressure between the parts may cause undesirable strain and damage thereto, resilient parts capable of absorbing the stack pressure are typically included.
- a shielded microphone assembly is preferably provided for use in a communications device having a circuit board and a housing and having an antenna or used proximate to an antenna.
- the microphone is placed inside a conductive, electromagnetic shield (e.g. a shielding can) and a separator (e.g. an o-ring-type) is placed over the shield, forming an assembly configured to co-operate with the housing and the circuit board to electrically connect each of the microphone and the electromagnetic shield to the circuit board.
- the device housing can then be stacked over the assembly, namely, over the shield to load the separator onto the shield and drive the shield directly against the circuit board, whereby the shield becomes grounded through an electrical connection with the circuit board.
- the electromagnetic shield when formed as a shielding can, may have a lip whereby the shielding can electrically connects to the circuit board by means of the lip.
- the separator preferably an electrical insulator
- when formed as a resilient o-ring preferably surrounds an outside perimeter of the shielding can over the lip.
- the separator when formed as a resilient disk, is preferably positioned over a ceiling of the shielding can, where the ceiling is configured to be positioned adjacent the housing upon the loading of the housing.
- the electromagnetic shield may include an outlet for communication of sound waves to the microphone.
- a further aspect of the invention preferably provides a mobile communications device comprising an antenna and a shielded microphone assembly according to the foregoing.
- a still further aspect of the invention preferably provides a method of shielding a microphone in such a communications device whereby the microphone is shielded with a conductive, electromagnetic shield; a resilient separator is provided over the electromagnetic shield; and, the shielded microphone and separator are sandwiched between the housing and the circuit board.
- the shielded microphone and separator are configured to co-operate with the housing and the circuit board to electrically connect each of the microphone and the electromagnetic shield to the circuit board, thereby grounding the electromagnetic shield.
- the sandwiching produces a loading of the housing onto the separator and the electromagnetic shield onto the circuit board, thereby enclosing the microphone between the circuit board and the electromagnetic shield.
- the shielded microphone assembly 10 can be used in any suitable communications device 20 having a circuit board 30 (see Fig. 2 ), which may be a printed circuit board, a housing 40 and, in a mobile communications device, an antenna (not shown).
- the shielded microphone assembly 10 has an electromagnetic shield in the form of a shielding can 50, a microphone 60 and a separator 70.
- the shielding can 50 is composed of a conductive material and is grounded through an electrical connection with an electrical ground contact of the circuit board 30.
- the microphone 60 is contained within the enclosure 80 and when installed in a communications device is electrically connected with the circuit board 30.
- the shielding can 50 and the microphone 60 may be any suitable shape such that the microphone 60 fits within the enclosure; accordingly, the cross-sectional shape of the shielding can 50 may be circular, square, hexagonal or any other suitable shape which co-operates with the shape of the microphone and circuit board.
- the microphone 60 may be held against the circuit board 30 by the shielding can 50; alternatively, the microphone 60 may be soldered or otherwise affixed to the circuit board 30.
- the shielding can 50 includes an outlet 90 or other means for communicating sound waves into the shielding can 50 and, thence, to the microphone 60.
- the separator 70 which is made of a resilient material and may also be insulating (e.g. rubber), is positioned between the shielding can 50 and the housing 40. In this manner, the shielding can 50 shields the enclosed microphone 60 from electromagnetic energy, including electromagnetic energy from a proximate antenna, while the separator 70, being resilient, is springy and able to rebound from, and absorb, pressure between the housing 40 and the shielding can 50.
- the separator 70 is an o-ring-type separator positioned over the shielding can 50 and apart from the circuit board 30, so as to surround the outside perimeter of the shielding can 50.
- the shielding can 50 of this embodiment includes a lip 100 over which the separator 70 is positioned such that, when installed in a communications device by stacking these components with the housing 40 positioned there over and the circuit board 30 positioned there under, the lip 100 of the shielding can 50 is pressed into electrical contact with the circuit board 30. By this stacking, the separator 70 is sandwiched between the housing 40 and the lip 100, and the lip 100 is sandwiched between the separator 70 and the circuit board 30.
- the separator 70 may be a resilient disk positioned over a shielding can 50 which does not include such a lip.
- the ceiling (top) 55 of the shielding can 50 parallel to the housing 40 is sandwiched between the disk separator 70 and the circuit board 30.
- the disk separator 70 is aligned over the shielding can 50 by means of an appropriately sized channel 110 formed in the housing 40.
- the disk separator 70 may include a central aperture 57, as shown, aligned in the stack with the counterpart outlet 90 of the ceiling of the shielding can 50 for communication of sound waves to the microphone 60.
- the challenges associated with the known methods of assembling a shielded microphone, as discussed above, are overcome by using the method described herein and illustrated by the flowchart of FIG. 4 .
- the method 120 can be used for the production of any suitable communications device having a circuit board, which may be a printed circuit board, a housing and, for mobiles devices, an antenna.
- the method 120 is used for assembling a shielded microphone 10 and mounting it onto a circuit board 30, wherein the shielded microphone assembly includes a shielding can 50 and a microphone 60.
- the shielding can 50 includes means for communicating sound waves into the shielding can 50 to the microphone 60.
- the shielding can 50 and the microphone 60 are mounted together, the microphone being placed within the shielding can, and positioned 130 on the circuit board 30 so that both the microphone and shielding are in electrical contact with the circuit board 30.
- a resilient separator 70 is positioned 140 over the shielding can 50.
- the housing 40 is stacked over and pressed onto 150 the separator 70 so as to load the separator 70, sandwiching it between the housing 40 and the shielding can 50.
- the shielding can 50 is pressed against the circuit board 30, whereby the shielded microphone assembly becomes mounted on the circuit board 30.
- the resilience of the separator 70 enables it to absorb (tolerate) the load placed on it by this stacking of the housing 40 onto the shielding can 50 and circuit board 30 there under.
- the microphone 60 of the shielded microphone assembly may first be mounted onto the circuit board 30 (e.g. by soldering), followed by mounting of the shielding can 50 onto the circuit board 30 so as to cover the microphone 60.
- the solutions described herein facilitate the manufacturing of such devices while at the same time reducing the overall cost of parts.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Transceivers (AREA)
- Transmitters (AREA)
Claims (18)
- Ensemble de microphone antibruit (10) comprenant un microphone (60) et un écran de protection électromagnétique conducteur (50), destiné à être utilisé dans un dispositif de communication (20) comportant une carte de circuit (30) et un boîtier (40), et étant situé à proximité d'une antenne en cours d'utilisation, caractérisé par un séparateur résilient (70) sur ledit écran de protection électromagnétique (50), dans lequel ledit écran de protection électromagnétique conducteur (50) est sur ledit microphone (60) et ledit ensemble (10) est configuré pour coopérer avec ledit boîtier (40) et ladite carte de circuit (30) pour relier électriquement chaque élément parmi ledit microphone (60) et ledit écran de protection électromagnétique (50) à ladite carte de circuit (30) lors du chargement dudit boîtier (40) sur ledit séparateur (70) et dudit écran de protection électromagnétique (50) sur ladite carte de circuit (30), renfermant ainsi ledit microphone (60) entre ladite carte de circuit (30) et ledit écran de protection électromagnétique (50) et reliant à la terre ledit écran de protection électromagnétique (50).
- Ensemble de microphone antibruit (10) selon la revendication 1, dans lequel ledit écran de protection électromagnétique (50) est formé comme une chemise de protection présentant une lèvre (100), ladite chemise de protection étant reliée électriquement à ladite carte de circuit (30) à l'aide de ladite lèvre (100).
- Ensemble de microphone antibruit (10) selon la revendication 2, dans lequel ledit séparateur (70) est un joint torique résilient entourant un périmètre extérieur de ladite chemise de protection sur ladite lèvre (100).
- Ensemble de microphone antibruit (10) selon la revendication 1, dans lequel ledit écran de protection électromagnétique (50) est formé comme une chemise de protection et ledit séparateur (70) est un disque résilient placé sur un plafond (55) de ladite chemise de protection, ledit plafond (55) étant configuré pour être positionné à proximité immédiate dudit boîtier (40) lors dudit chargement dudit boîtier (40).
- Ensemble de microphone antibruit (10) selon la revendication 4, dans lequel ledit disque est aligné sur ladite chemise de protection, lors dudit chargement dudit boîtier (40), à l'aide d'un canal (110) formé dans ledit boîtier (40).
- Ensemble de microphone antibruit (10) selon l'une quelconque des revendications précédentes, dans lequel ledit séparateur (70) comprend un matériau d'isolation électrique.
- Ensemble de microphone antibruit (10) selon l'une quelconque des revendications précédentes, dans lequel ladite carte de circuit (30) est une carte de circuit imprimé.
- Ensemble de microphone antibruit (10) selon l'une quelconque des revendications précédentes, dans lequel ledit écran de protection électromagnétique (50) comprend un orifice de sortie (90) destiné à communiquer les ondes sonores audit microphone (60).
- Ensemble de microphone antibruit (10) selon la revendication 4 ou la revendication 5, dans lequel ledit disque comprend une ouverture centrale (57) destinée à communiquer les ondes sonores audit microphone (50).
- Dispositif de communication mobile (20) comprenant une antenne et un ensemble de microphone antibruit (10) selon l'une quelconque des revendications 1 à 9.
- Procédé de protection d'un microphone (60) dans un dispositif de communication (20) comprenant une carte de circuit (30) et un boîtier (40), ledit dispositif (20) étant utilisé avec une antenne faisant partie dudit dispositif (20) ou située à proximité dudit dispositif (20), le procédé comprenant la protection dudit microphone (60) à l'aide d'un écran de protection électromagnétique conducteur (50) sur ledit microphone (60) et caractérisé par les étapes consistant à :prévoir un séparateur résilient (70) sur ledit écran de protection électromagnétique (50) ; etintercaler ledit microphone protégé et ledit séparateur (70) entre ledit boîtier (40) et ladite carte de circuit (30) ;moyennant quoi ledit microphone protégé et ledit séparateur (70) sont configurés pour coopérer avec ledit boîtier (40) et ladite carte de circuit (30) pour relier électriquement ledit microphone (60) et ledit écran de protection électromagnétique (50) à ladite carte de circuit (30), ledit écran de protection électromagnétique (50) étant ainsi relié à la terre, ledit intercalage produisant un chargement dudit boîtier (40) sur ledit séparateur (70) et dudit écran de protection électromagnétique (50) sur ladite carte de circuit (30), renfermant ainsi ledit microphone (60) entre ladite carte de circuit (30) et ledit écran de protection électromagnétique (50).
- Procédé selon la revendication 11, moyennant quoi ledit écran de protection électromagnétique (50) est formé comme une chemise de protection présentant une lèvre (100), ladite chemise de protection pouvant être électriquement reliée à ladite carte de circuit (30) à l'aide de ladite lèvre (100).
- Procédé selon la revendication 12, moyennant quoi ledit séparateur (70) est un joint torique résilient prévu pour entourer un périmètre extérieur de ladite chemise de protection.
- Procédé selon la revendication 11, moyennant quoi ledit écran de protection électromagnétique (50) est formé comme une chemise de protection et ledit séparateur (70) est un disque résilient prévu sur un plafond (55) de ladite chemise de protection, ledit plafond (55) étant positionné à proximité immédiate dudit boîtier (40) lors dudit chargement dudit boîtier (40).
- Procédé selon l'une quelconque des revendications 11à 14, moyennant quoi ledit séparateur (70) comprend un matériau d'isolation électrique.
- Procédé selon l'une quelconque des revendications 11à 15, moyennant quoi ledit écran de protection électromagnétique (50) comprend un orifice de sortie (90) destiné à communiquer les ondes sonores audit microphone (60).
- Procédé selon l'une quelconque des revendications 11à 16, moyennant quoi ledit microphone (60) est fixé à ladite carte de circuit (30) et ladite carte de circuit (30) est une carte de circuit imprimé.
- Procédé selon l'une quelconque des revendications 11à 17, moyennant quoi ledit microphone (60) est maintenu contre ladite carte de circuit (30) par ledit écran de protection électromagnétique (50).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06112357A EP1843625B1 (fr) | 2006-04-07 | 2006-04-07 | Microphone blindé pour un dispositif de communication mobile |
DE602006004174T DE602006004174D1 (de) | 2006-04-07 | 2006-04-07 | Abgeschirmtes Mikrofon für ein mobiles Kommunikationsgerät |
AT06112357T ATE417478T1 (de) | 2006-04-07 | 2006-04-07 | Abgeschirmtes mikrofon für ein mobiles kommunikationsgerät |
CA2583899A CA2583899C (fr) | 2006-04-07 | 2007-04-04 | Micro blinde pour dispositif de communication mobile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06112357A EP1843625B1 (fr) | 2006-04-07 | 2006-04-07 | Microphone blindé pour un dispositif de communication mobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1843625A1 EP1843625A1 (fr) | 2007-10-10 |
EP1843625B1 true EP1843625B1 (fr) | 2008-12-10 |
Family
ID=37054401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06112357A Active EP1843625B1 (fr) | 2006-04-07 | 2006-04-07 | Microphone blindé pour un dispositif de communication mobile |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1843625B1 (fr) |
AT (1) | ATE417478T1 (fr) |
CA (1) | CA2583899C (fr) |
DE (1) | DE602006004174D1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115498463B (zh) * | 2022-11-18 | 2023-02-03 | 深圳市西点精工技术有限公司 | 一种电磁屏蔽复合组件及高速背板连接器 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2809939B2 (ja) * | 1992-08-26 | 1998-10-15 | 松下電器産業株式会社 | マイクロホン装置 |
FI970409A (fi) * | 1997-01-31 | 1998-08-01 | Nokia Mobile Phones Ltd | Menetelmä mikrofonin suojaamiseksi ulkoisilta häiriötekijäiltä ja mikrofonin häiriösuojus |
US5937361A (en) * | 1997-05-09 | 1999-08-10 | Ericsson Inc. | Radiotelephones with shielded microphones |
US7398072B2 (en) * | 2004-08-31 | 2008-07-08 | Research In Motion Limited | Mobile wireless communications device with reduced microphone noise from radio frequency communications circuitry |
-
2006
- 2006-04-07 DE DE602006004174T patent/DE602006004174D1/de active Active
- 2006-04-07 EP EP06112357A patent/EP1843625B1/fr active Active
- 2006-04-07 AT AT06112357T patent/ATE417478T1/de not_active IP Right Cessation
-
2007
- 2007-04-04 CA CA2583899A patent/CA2583899C/fr active Active
Also Published As
Publication number | Publication date |
---|---|
ATE417478T1 (de) | 2008-12-15 |
CA2583899C (fr) | 2011-03-08 |
DE602006004174D1 (de) | 2009-01-22 |
CA2583899A1 (fr) | 2007-10-07 |
EP1843625A1 (fr) | 2007-10-10 |
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