EP1156701B1 - Transducteur électroacoustique à dimensions réduites - Google Patents

Transducteur électroacoustique à dimensions réduites Download PDF

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Publication number
EP1156701B1
EP1156701B1 EP01890099A EP01890099A EP1156701B1 EP 1156701 B1 EP1156701 B1 EP 1156701B1 EP 01890099 A EP01890099 A EP 01890099A EP 01890099 A EP01890099 A EP 01890099A EP 1156701 B1 EP1156701 B1 EP 1156701B1
Authority
EP
European Patent Office
Prior art keywords
housing
electroacoustic transducer
cup
yoke
component
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
Application number
EP01890099A
Other languages
German (de)
English (en)
Other versions
EP1156701A3 (fr
EP1156701A2 (fr
Inventor
Richard Pribyl
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 AT01890099T priority Critical patent/ATE405128T1/de
Publication of EP1156701A2 publication Critical patent/EP1156701A2/fr
Publication of EP1156701A3 publication Critical patent/EP1156701A3/fr
Application granted granted Critical
Publication of EP1156701B1 publication Critical patent/EP1156701B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention now aims to solve these problems and to provide a transducer of small dimensions, in particular with an outer diameter of the housing of 15 mm or below, which achieves the required accuracy and in particular the necessary centricity cost.
  • a component 11 which has substantially the shape of the cup-shaped yoke part 1, but on which a projection 3 corresponding projection 13 is formed integrally with.
  • This component consists of a metallizable plastic and it is, if it is solidified in the injection mold, this not removed, but it is only the upper part of the injection mold replaced by another shell and then it is this cup-like member 11 in essential areas of a Surrounding plastic, which is not metallizable and ultimately has an outer shape which at least substantially corresponds to the shape of the housing 2 of conventional electro-acoustic transducer.
  • This outer part 12 preferably has a location as in FIG Fig. 2 illustrated, a recess or notch 16, so that a portion 14 'of the projection 13 is connected via a lying in the region of the notch 16 free surface with the inner portion of the cup-like member 11.
  • a cover 15 is provided, by means of which the surface of the projection 13 is separated into two metallizable areas, which do not have a connection which could be metallized, whereby the two contacts are electrically separated from one another.
  • the material of the housing part 12 encloses the outside (in the Fig. 2 invisible underside) of the cup-like member 11 in its entirety.
  • the further processing of the semi-finished electroacoustic transducer thus produced is carried out in the usual way: It is glued in the center of the cup-like member 11 of the magnet together with already glued to him disc-shaped yoke member, which is ensured by appropriate guides or gauges sufficient centricity. It is then the membrane, optionally secured with a mounting or retaining ring on the housing part 12, wherein the mounted on the diaphragm voice coil comes to lie centrally in the air gap.
  • the supply wires of the voice coil are guided in the region of the membrane attachment from the interior of the then closed transducer and in each case with one of the two contacts 14 ', 14 "mechanically and electrically conductively connected, for example by friction welding or ultrasonic welding.
  • the diaphragm, attached to the coil and the retaining ring of the membrane are produced in one operation, their centricity is ensured to a large extent. Since the retaining ring is fixed to the housing part 12 and this part is in excellent centricity to the pot-like part 11, the problem of eccentric arrangement of the voice coil in the air gap is best solved. Due to the one-piece design of the cup-like member 11 and the housing part 12 with each other and with the contacts 14 ', 14 ", the overall handling for such a highly miniaturized electroacoustic transducer is greatly improved compared to prior art handling.
  • fitting of the pole plate 25 must not be as shown, since it can be quite advantageous to make the recess in the housing part 22 in the axial direction so large that the pole plate is seated in the axial direction exclusively on the ring magnet 24 and is glued to it and the recess in the housing part 22 only takes over the radial guidance.
  • FIGS. 5 and 6 Another variant is in FIGS. 5 and 6 shown; In this case, a (or more appropriately arranged) radially magnetized magnet is used. It shows the Fig. 5 the previous structure of such electroacoustic transducer according to the prior art and the Fig. 6 a variant of the invention.
  • a yoke part 33 and an outer yoke part 35 are arranged radially inside and radially outside these individual magnetic platelets, respectively. These two yoke parts are on the front side of the electroacoustic transducer, which faces a diaphragm 37 shown in this figure Air gap, in which a voice coil 38 dips.
  • the two yoke parts are each mounted in an inner housing 31 and an outer housing 32, wherein the outer housing 32 also carries the membrane 37.
  • FIG. 6 A partially galvanically metallized outer housing 42 and an at least partially galvanized yoke part 41 are provided with correspondingly planar surfaces 43, 45 during injection molding, between which the platelet-shaped magnets 44 come to lie in the mounted state.
  • the surfaces 43, 45 and the adjacent areas ( Fig. 6 upward), which finally leave the air gap between them, are galvanically coated with metal and serve as a yoke for the magnet system.
  • the yoke part 41 and the housing part 42 may be produced from two different types of plastic in a two-stage injection molding process, as described with reference to FIG Fig. 2 has been described for the local variant.
  • Fig. 6 is an annular groove indicated at the upper outer edge of the housing part 42, which serves to receive a mounting ring for a membrane, this annular groove can of course be designed differently, the attachment of the membrane to a housing part belongs to the prior art, by the integral production Injection molding, an extremely high centricity can be achieved without this would cause the otherwise necessary costs.
  • the invention is not limited to the illustrated embodiments, but may be variously modified. It is essential that at least a portion of the yoke forming parts of the magnetic system of an electroacoustic transducer not as discrete components but as a metallic coating on an injection molded plastic part of the electroacoustic transducer. It is particularly preferred that all yoke parts are made of such metallic coatings, as this the simplest and most economical way, the best possible centering can be achieved.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Claims (4)

  1. Transducteur électroacoustique à dimensions réduites, en particulier comportant un boîtier avec un diamètre extérieur de 15 mm ou moins, caractérisé en ce qu'il comporte un élément en forme de récipient (11, 21, 31) en matière plastique métallisable, qui est fondu à partir d'un élément de boîtier (12, 22, 32) en matière plastique non métallisable présentant une forme de boîtier, et en ce qu'au moins la surface intérieure de l'élément en forme de récipient (11, 21, 31) est munie d'un revêtement en métal.
  2. Transducteur électroacoustique selon la revendication 1, caractérisé en ce que l'élément en forme de récipient (11, 21, 31) présente au moins une partie saillante (13) faisant saillie radialement, et en ce qu'au moins une partie de la surface (14', 14") de la partie saillante faisant saillie radialement (13) est munie d'un revêtement métallique.
  3. Transducteur acoustique à dimensions réduites, en particulier avec un boîtier d'un diamètre extérieur de 15 mm ou moins, comportement des plaquettes magnétiques (44) pouvant être magnétisées radialement, caractérisé en ce qu'il présente une partie de culasse (41), qui est métallisée dans la zone de sa surface de gaine extérieure (43) et un élément de boîtier (42) annulaire séparé de la partie de culasse, qui est métallisé dans la zone de sa surface de gaine intérieure (45), et en ce que les plaquettes magnétiques (44) sont disposées entre les surfaces d'enveloppe métallisée (43, 45).
  4. Transducteur acoustique selon la revendication 3, caractérisé en ce que la partie de culasse (41) présente au moins une partie saillante faisant saillie radialement, et en ce qu'au moins une partie de la surface de la partie saillante faisant saillie radialement est munie d'un revêtement métallique.
EP01890099A 2000-05-15 2001-03-28 Transducteur électroacoustique à dimensions réduites Expired - Lifetime EP1156701B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01890099T ATE405128T1 (de) 2000-05-15 2001-03-28 Elektroakustischer wandler mit kleinen abmessungen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0084200A AT411559B (de) 2000-05-15 2000-05-15 Elektroakustischer wandler mit kleinen abmessungen
AT8422000 2000-05-15

Publications (3)

Publication Number Publication Date
EP1156701A2 EP1156701A2 (fr) 2001-11-21
EP1156701A3 EP1156701A3 (fr) 2007-04-18
EP1156701B1 true EP1156701B1 (fr) 2008-08-13

Family

ID=3682054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01890099A Expired - Lifetime EP1156701B1 (fr) 2000-05-15 2001-03-28 Transducteur électroacoustique à dimensions réduites

Country Status (7)

Country Link
US (2) US6668066B2 (fr)
EP (1) EP1156701B1 (fr)
JP (1) JP2001326992A (fr)
CN (1) CN1232091C (fr)
AT (2) AT411559B (fr)
DE (1) DE50114205D1 (fr)
DK (1) DK1156701T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003289596A (ja) * 2002-03-27 2003-10-10 Citizen Electronics Co Ltd スピーカ及びその製造方法
KR20020057897A (ko) * 2002-05-28 2002-07-12 전창만 다기능 전자음향변환기의 구조
EP1515582B1 (fr) * 2003-09-11 2006-01-11 AKG Acoustics GmbH Convertisseur électroacoustique dynamique, en particulier petit haut-parleur
EP1694094A1 (fr) * 2005-02-18 2006-08-23 AKG Acoustics GmbH Membrane pour convertisseur dynamique
FR2919486B1 (fr) * 2007-07-31 2009-10-02 Captomed Entpr Unipersonnelle Capteur de pression auto-etalonnable.
DE102009038593A1 (de) * 2009-08-26 2011-03-03 Beyerdynamic Gmbh & Co. Kg Schallwandler-Magnetsystem
ITPD20110191A1 (it) * 2011-06-13 2012-12-14 Maurizio Servadio Trasduttore elettromeccanico/elettroacustico sottile
CN112134018A (zh) * 2020-10-26 2020-12-25 广东华旃电子有限公司 汽车天线屏蔽组件及其制作方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT366862B (de) * 1980-07-28 1982-05-10 Akg Akustische Kino Geraete Elektroakustischer wandler nach dem zweiwegprinzip
US6151402A (en) * 1995-09-02 2000-11-21 New Transducers Limited Vibration transducers
US6047077A (en) * 1998-09-29 2000-04-04 Larsen; John T. Bipolar speaker
JP3035704B1 (ja) * 1998-10-28 2000-04-24 株式会社アクーヴ・ラボ 電気−機械振動変換器
JP4276315B2 (ja) * 1998-11-17 2009-06-10 シチズン電子株式会社 電磁型発音体
JP2002058095A (ja) * 2000-08-11 2002-02-22 Star Micronics Co Ltd 電磁音響変換器

Also Published As

Publication number Publication date
EP1156701A3 (fr) 2007-04-18
ATE405128T1 (de) 2008-08-15
CN1327335A (zh) 2001-12-19
US6668066B2 (en) 2003-12-23
US7245738B2 (en) 2007-07-17
EP1156701A2 (fr) 2001-11-21
ATA8422000A (de) 2003-07-15
DK1156701T3 (da) 2008-12-15
CN1232091C (zh) 2005-12-14
JP2001326992A (ja) 2001-11-22
US20010040972A1 (en) 2001-11-15
US20040066950A1 (en) 2004-04-08
AT411559B (de) 2004-02-25
DE50114205D1 (de) 2008-09-25

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