WO2000074435A3 - Assembly of an armature and magnetic elements for an electroacoustic transducer - Google Patents
Assembly of an armature and magnetic elements for an electroacoustic transducer Download PDFInfo
- Publication number
- WO2000074435A3 WO2000074435A3 PCT/NL2000/000373 NL0000373W WO0074435A3 WO 2000074435 A3 WO2000074435 A3 WO 2000074435A3 NL 0000373 W NL0000373 W NL 0000373W WO 0074435 A3 WO0074435 A3 WO 0074435A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- armature
- leg
- assembly
- document
- electroacoustic transducer
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/04—Microphones
Definitions
- IPC International Patent Classification
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
Electroacoustic transducer comprising a case accommodating an armature (16) with at least two armature legs, a coil (19) with an air gap, which is fitted around one armature leg, a magnet/pole piece assembly (17, 18) with an air gap, which is also fitted around the one armature leg, with the air gap of the coil (19) and that of the magnet/pole piece assembly (17, 18) being located in line with each other, a diaphragm (4) and a connecting element which couples a free end of the one armature leg to the diaphragm (4). According to the invention, there are provided two identical pole piece/magnet assemblies (18, 18'), which are both arranged opposite each other on opposite sides of one leg of the armature by attaching each assembly (18, 18') to at least one other leg of the armature. Such assemblies are simple to produce and ensure proper symmetry of the assemblies with respect to the armature leg.
Description
Inter 'onal Application No
PC1 /NL 00/00373
A. CLASSIFICATION OF SUBJECT MATTER
IPC 7 H04R11/00
According to International Patent Classification (IPC) or to both national classification and IPC
B. FIELDS SEARCHED
Minimum documentation searched (classification system followed by classification symbols)
IPC 7 H04R
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched
Electronic data base consulted during the international search (name of data base and where practical search terms used)
PAJ , EPO-Internal , WPI Data
C. DOCUMENTS CONSIDERED TO BE RELEVANT
Category " Citation of document with indication where appropπate of the relevant passages Relevant to claim No
PATENT ABSTRACTS OF JAPAN 1-4,7 vol. 007, no. 208 (E-198),
14 September 1983 ( 1983-09-14)
-& JP 58 104597 A (MATSUSHITA DENKI SANGYO
KK), 22 June 1983 (1983-06-22) abstract
PATENT ABSTRACTS OF JAPAN 1,6,7 vol. 007, no. 214 (E-199),
21 September 1983 ( 1983-09-21)
-& JP 58 106999 A (MATSUSHITA DENKI SANGYO
KK) , 25 June 1983 (1983-06-25) abstract
GB 2 095 510 A (KN0WLES ELECTRONICS CO) 1 , 2 , 6 29 September 1982 (1982-09-29) page 1 , col umn 2 , l i ne 120 -page 2 , col umn 1 , l i ne 41 ; fi gures 1-3
-/--
Further documents are listed in the continuation of box C Patent family members are listed in annex
' Special categories of cited documents
■T" later document published after the international filing date or pnoπty date and not in conflict with the application but
"A" document defining the general state of the art which is not cited to understand the principle or theory underlying the considered to be of particular relevance invention
"E" earlier document but published on or after the international "X" document of particular relevance, the claimed invention filing date cannot be considered novel or cannot be considered to
'L" document which may throw doubts on pnoπty claιm(s) or involve an inventive step when the document is taken alone which is cited to establish the publication date of another "Y" document of particular relevance the claimed invention citation or other special reason (as specified) cannot be considered to involve an inventive step when the
"O" document referring to an oral disclosure, use, exhibition or document is combined with one or more other such docuother means ments, such combination being obvious to a person skilled ■P" document published prior to the international filing date but in the art later than the priority date claimed "&" document member of the same patent family
Date of the actual completion of the international search Date of mailing of the international search report
7 February 2001 15/02/2001
Name and mailing address of the ISA Authoπzed officer
European Patent Office, P B 5818 Patentlaan 2 NL - 2280 HV Rιjswi|k Tel (+31-70) 340-20 0, Tx 31 651 epo nl, Fax (+31-70) 3 0-3016 Anderson , A
Form PCT/ISA/210 (second sheet) (July 1992)
Inter onal Application No
PC1 /NL 00/00373
C.(Contlnuatιon) DOCUMENTS CONSIDERED TO BE RELEVANT
Category ° Citation of document with indication.where appropriate, of the relevant passages Relevant to claim No
EP 0851 710 A (MICROTRONIC NEDERLAND BV ) 1 July 1998 (1998-07-01) cited in the appl icati on
Fomn PCT/ISA/210 (continuation of second sheet) (July 1992)
iformation on patent family members
PCI/NL 00/00373
Patent document Publication Patent family Publication cited in search report date member(s) date
JP 58104597 A 22-06-1983 NONE
JP 58106999 A 25-06-1983 NONE
GB 2095510 A 29-09-1982 NONE
EP 0851710 A 01-07-1998 NL 1004877 C 03-08-1998 NL 1004877 A 25-06-1998 US 6078677 A 20-06-2000
Form PCT/ISA/210 (patent family annex) (July 1992)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1012207A NL1012207C1 (en) | 1999-06-01 | 1999-06-01 | Assembly of an armature and magnetic elements for an electroacoustic transducer. |
| NL1012207 | 1999-06-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2000074435A2 WO2000074435A2 (en) | 2000-12-07 |
| WO2000074435A3 true WO2000074435A3 (en) | 2001-05-10 |
Family
ID=19769295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL2000/000373 WO2000074435A2 (en) | 1999-06-01 | 2000-05-31 | Assembly of an armature and magnetic elements for an electroacoustic transducer |
Country Status (2)
| Country | Link |
|---|---|
| NL (1) | NL1012207C1 (en) |
| WO (1) | WO2000074435A2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10308225A1 (en) * | 2003-02-25 | 2004-09-16 | Auke Nauta | Loudspeaker for hearing aid or mobile telephone comprises electromagnets separated by gap through which membrane passes |
| CN102428715B (en) | 2009-05-11 | 2014-12-31 | 美商楼氏电子有限公司 | Low axial vibration receiver armature and assembly |
| EP3048810B1 (en) * | 2010-12-14 | 2019-03-20 | Sonion Nederland B.V. | Multi-layer armature for moving armature receiver |
| CN103037294A (en) * | 2011-09-30 | 2013-04-10 | 苏州恒听电子有限公司 | Armature device for moving-iron microphone/transducer |
| US9888322B2 (en) | 2014-12-05 | 2018-02-06 | Knowles Electronics, Llc | Receiver with coil wound on a stationary ferromagnetic core |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2095510A (en) * | 1981-03-25 | 1982-09-29 | Knowles Electronics Co | Electroacoustic transducers |
| JPS58104597A (en) * | 1981-12-17 | 1983-06-22 | Matsushita Electric Ind Co Ltd | Electromagnetic type converter |
| JPS58106999A (en) * | 1981-12-18 | 1983-06-25 | Matsushita Electric Ind Co Ltd | Electromagnetic acoustic transducer |
| EP0851710A1 (en) * | 1996-12-23 | 1998-07-01 | Microtronic Nederland B.V. | Electroacoustic transducer |
-
1999
- 1999-06-01 NL NL1012207A patent/NL1012207C1/en not_active IP Right Cessation
-
2000
- 2000-05-31 WO PCT/NL2000/000373 patent/WO2000074435A2/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2095510A (en) * | 1981-03-25 | 1982-09-29 | Knowles Electronics Co | Electroacoustic transducers |
| JPS58104597A (en) * | 1981-12-17 | 1983-06-22 | Matsushita Electric Ind Co Ltd | Electromagnetic type converter |
| JPS58106999A (en) * | 1981-12-18 | 1983-06-25 | Matsushita Electric Ind Co Ltd | Electromagnetic acoustic transducer |
| EP0851710A1 (en) * | 1996-12-23 | 1998-07-01 | Microtronic Nederland B.V. | Electroacoustic transducer |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 007, no. 208 (E - 198) 14 September 1983 (1983-09-14) * |
| PATENT ABSTRACTS OF JAPAN vol. 007, no. 214 (E - 199) 21 September 1983 (1983-09-21) * |
Also Published As
| Publication number | Publication date |
|---|---|
| NL1012207C1 (en) | 2000-12-04 |
| WO2000074435A2 (en) | 2000-12-07 |
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