EP1460881A3 - Magnetic system of an acoustic transducer - Google Patents

Magnetic system of an acoustic transducer Download PDF

Info

Publication number
EP1460881A3
EP1460881A3 EP04450043A EP04450043A EP1460881A3 EP 1460881 A3 EP1460881 A3 EP 1460881A3 EP 04450043 A EP04450043 A EP 04450043A EP 04450043 A EP04450043 A EP 04450043A EP 1460881 A3 EP1460881 A3 EP 1460881A3
Authority
EP
European Patent Office
Prior art keywords
magnet system
housing
pole plate
thickness
magnet
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.)
Granted
Application number
EP04450043A
Other languages
German (de)
French (fr)
Other versions
EP1460881B1 (en
EP1460881A2 (en
Inventor
Hugo Dr. Lenhard-Backhaus
Ernst Dipl.-Ing. Stöttinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AKG Acoustics GmbH
Original Assignee
AKG Acoustics GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AKG Acoustics GmbH filed Critical AKG Acoustics GmbH
Priority to AT04450043T priority Critical patent/ATE409397T1/en
Publication of EP1460881A2 publication Critical patent/EP1460881A2/en
Publication of EP1460881A3 publication Critical patent/EP1460881A3/en
Application granted granted Critical
Publication of EP1460881B1 publication Critical patent/EP1460881B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Amplifiers (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

Die Erfindung betrifft einen Magnetsystem eines auf dem elektrodynamischen Prinzip basierenden, miniaturisierten Schallwandlers (1) mit einem Gehäuse (6) aus tiefgezogenem Blech, einem einen Magneten (9) aufweisenden Magnetsystem (4) und einer Membrane (14) die mit einer Spule (13) versehen ist, von der Drähte (5) zu einer Kontaktstelle (15) führen.The invention relates to a magnet system of a miniaturized sound transducer (1) based on the electrodynamic principle, comprising a housing (6) of deep drawn sheet metal, a magnet system (4) having a magnet (9) and a diaphragm (14) connected to a coil (13 ), lead from the wires (5) to a contact point (15).

Die Erfindung ist dadurch gekennzeichnet, dass das Gehäuse (6) mit einem Außendurchmesser von maximal 20 mm aus dünnem Stahlblech mit einer mittleren Dicke von maximal 0,2 mm besteht, dass das Magnetsystem (4) eine untere Polplatte und eine obere Polplatte (10) aufweist, und dass die Polplatten (10) aus Stahlblech mit einer Dicke von zumindest dem 1,5-fachen der mittleren Dicke des Bodens des Gehäuses (6) bestehen. In einer Ausgestaltung weist das Magnetsystem statt der unteren Polplatte einen Magnettopf (8) auf.The invention is characterized in that the housing (6) with an outer diameter of at most 20 mm consists of thin sheet steel with an average thickness of at most 0.2 mm, that the magnet system (4) has a lower pole plate and an upper pole plate (10). and that the pole plates (10) are made of sheet steel having a thickness of at least 1.5 times the mean thickness of the bottom of the housing (6). In one embodiment, the magnet system has a magnetic pot (8) instead of the lower pole plate.

Die Erfindung betrifft auch ein Verfahren zur Herstellung eines derartigen Wandlers.

Figure imgaf001
The invention also relates to a method for producing such a converter.
Figure imgaf001
EP04450043A 2003-03-17 2004-03-01 Magnetic system of an acoustic transducer Expired - Lifetime EP1460881B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT04450043T ATE409397T1 (en) 2003-03-17 2004-03-01 MAGNETIC SYSTEM OF A SOUND TRANSDUCER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4182003 2003-03-17
AT0041803A AT414196B (en) 2003-03-17 2003-03-17 MAGNETIC SYSTEM OF A SOUND TRANSFORMER

Publications (3)

Publication Number Publication Date
EP1460881A2 EP1460881A2 (en) 2004-09-22
EP1460881A3 true EP1460881A3 (en) 2007-04-11
EP1460881B1 EP1460881B1 (en) 2008-09-24

Family

ID=32777531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04450043A Expired - Lifetime EP1460881B1 (en) 2003-03-17 2004-03-01 Magnetic system of an acoustic transducer

Country Status (7)

Country Link
US (1) US7151840B2 (en)
EP (1) EP1460881B1 (en)
JP (1) JP2004282761A (en)
CN (1) CN100359990C (en)
AT (2) AT414196B (en)
DE (1) DE502004008108D1 (en)
DK (1) DK1460881T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4652035B2 (en) * 2004-12-07 2011-03-16 パイオニア株式会社 Speaker
JP4913748B2 (en) * 2005-11-15 2012-04-11 パイオニア株式会社 Speaker and magnetic circuit
KR100811739B1 (en) 2006-06-02 2008-03-11 에스텍 주식회사 Speaker
DE102008024816B4 (en) * 2008-05-23 2015-07-16 Sennheiser Electronic Gmbh & Co. Kg Dynamic electro-acoustic transducer and handset
CN102413405B (en) * 2011-11-16 2014-06-04 瑞声声学科技(深圳)有限公司 Magnetic circuit system and sound generation device using same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723397A (en) * 1980-07-18 1982-02-06 Pioneer Electronic Corp External magnetic type magnetic circuit of dynamic loudspeaker
GB2104346A (en) * 1981-08-13 1983-03-02 Jensen Int Inc Integral combined core and back plate for loudspeaker and process for fabricating the same
US5751828A (en) * 1994-05-30 1998-05-12 Matsushita Electric Industrial Co., Ltd. Magnetic circuit unit for loud-speaker and method of manufacturing the same
US20020071590A1 (en) * 2000-12-09 2002-06-13 Samsung Electro-Mechanics Co., Ltd. Magnetic circuit of micro speaker

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3045032B2 (en) * 1994-02-22 2000-05-22 松下電器産業株式会社 headphone
US5764784A (en) * 1994-09-12 1998-06-09 Sanyo Electric Co., Ltd. Electroacoustic transducer
KR100477261B1 (en) * 2002-02-15 2005-03-18 삼성전기주식회사 Speaker and Speaker Manufacturing Method
US20040105568A1 (en) * 2002-12-03 2004-06-03 Po-Hsiung Lee Speaker with enhanced magnetic flux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723397A (en) * 1980-07-18 1982-02-06 Pioneer Electronic Corp External magnetic type magnetic circuit of dynamic loudspeaker
GB2104346A (en) * 1981-08-13 1983-03-02 Jensen Int Inc Integral combined core and back plate for loudspeaker and process for fabricating the same
US5751828A (en) * 1994-05-30 1998-05-12 Matsushita Electric Industrial Co., Ltd. Magnetic circuit unit for loud-speaker and method of manufacturing the same
US20020071590A1 (en) * 2000-12-09 2002-06-13 Samsung Electro-Mechanics Co., Ltd. Magnetic circuit of micro speaker

Also Published As

Publication number Publication date
ATE409397T1 (en) 2008-10-15
AT414196B (en) 2006-10-15
DE502004008108D1 (en) 2008-11-06
CN100359990C (en) 2008-01-02
US20040197005A1 (en) 2004-10-07
US7151840B2 (en) 2006-12-19
JP2004282761A (en) 2004-10-07
EP1460881B1 (en) 2008-09-24
EP1460881A2 (en) 2004-09-22
CN1531370A (en) 2004-09-22
DK1460881T3 (en) 2009-01-26
ATA4182003A (en) 2005-12-15

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