EP0531691A2 - Système de bobine mobile pour des transducteurs électromagnétiques - Google Patents

Système de bobine mobile pour des transducteurs électromagnétiques Download PDF

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Publication number
EP0531691A2
EP0531691A2 EP92112916A EP92112916A EP0531691A2 EP 0531691 A2 EP0531691 A2 EP 0531691A2 EP 92112916 A EP92112916 A EP 92112916A EP 92112916 A EP92112916 A EP 92112916A EP 0531691 A2 EP0531691 A2 EP 0531691A2
Authority
EP
European Patent Office
Prior art keywords
membrane
voice coil
tube section
electromagnetic transducer
loudspeaker
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
EP92112916A
Other languages
German (de)
English (en)
Other versions
EP0531691B1 (fr
EP0531691A3 (en
Inventor
Leonhard Dipl.-Phys. Kreitmeier
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.)
Nokia Deutschland GmbH
Original Assignee
Nokia Deutschland 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 Nokia Deutschland GmbH filed Critical Nokia Deutschland GmbH
Publication of EP0531691A2 publication Critical patent/EP0531691A2/fr
Publication of EP0531691A3 publication Critical patent/EP0531691A3/de
Application granted granted Critical
Publication of EP0531691B1 publication Critical patent/EP0531691B1/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
    • 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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering
    • 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
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils

Definitions

  • the invention is concerned with electromagnetic transducers whose magnet systems have an internal stray field magnet.
  • Such converters have been known in the prior art for some time. Representative of this, reference is made to DE-P 37 30 305.
  • This document illustrates an electromagnetic transducer which, in contrast to conventional dynamic transducers, has a magnet system which is concentrically surrounded by the voice coil at a short distance.
  • the magnet system is formed by two permanent magnet disks, between which the pole disk - also called a diffusing disk - is arranged.
  • One permanent magnet disk of the magnet system is connected to the loudspeaker housing base, while the other permanent magnet disk extends in the direction of the membrane.
  • the magnet system is surrounded concentrically by the voice coil.
  • the arrangement of the Voice coil in the area of the pole disc is common.
  • the voice coil is arranged on a so-called voice coil support, which is connected with its one end facing away from the bottom of the loudspeaker basket to the end of the conical membrane, which has the smaller of the two diameters.
  • the connection of the membrane and the voice coil former is usually listed as an adhesive connection.
  • the object of the invention is to provide a generic transducer which reduces or eliminates the disadvantages mentioned.
  • the end of the conical membrane which has the smaller of the two diameters, is designed as a tube section, and in that the voice coil is connected to the tube section.
  • the one-piece design of the membrane and pipe section ensures that the seam area between the voice coil former and the membrane, which otherwise requires a complex connection due to the forces to be transmitted, is eliminated.
  • this has the further advantage that the recyclability of such a loudspeaker is improved by the material of the membrane and the tube section / voice coil former.
  • the pipe section extends towards the bottom of the loudspeaker basket. This is because the centering membrane can be attached to the outer jacket of the pipe section without the pipe section being lengthened and therefore the overall depth of the loudspeaker having to be increased. This extension is particularly necessary when the pipe section extends into the membrane cone. In this case, an additional pipe section, which extends in the direction of the bottom of the loudspeaker cage, is required, which extends below the pole disks when the system is at rest and which serves as a fastening flange for the centering membrane.
  • the end of the tube section which faces away from the membrane, is formed with an internal flange that reduces the clear diameter of the tube section and extends at right angles to the lateral surface of the tube section, this has the advantage that this loudspeaker is particularly simple with the voice coil can be equipped. For this it is only necessary to place and glue the unsupported wound voice coil from the side of the membrane opening to the flange. The voice coil is fixed until the adhesive has hardened this design of the pipe section is no longer required. A special effort for the flange does not need to be driven if it is formed at the same time in the one-piece design of the membrane and pipe section.
  • the loudspeaker 10 shown in FIG. 1 is essentially formed by the magnet system 11, the loudspeaker basket 12 and the membrane 13.
  • the magnet system 11 is formed by two permanent magnet disks 14.1 and 14.2, to which a pole disk 15 is arranged.
  • the lower permanent magnet disk 14.1 rests on a base 16, which stands centrally on the bottom 17 of the speaker basket 12.
  • the membrane 13 is conical.
  • the end of the membrane 13, which has the larger of the two diameters, is connected to the upper edge 19 of the speaker basket 12 by means of the curved bead 18.
  • the other end of the membrane 13 has a longer tube section 20.1, which projects into the cone formed by the jacket of the membrane 13.
  • the shorter part of the pipe section 20.2 extends in the direction of the bottom 17 of the speaker cage 12.
  • the membrane 13 and the pipe sections 20.1 and 20.2 are formed in one piece. These pipe sections 20.1 and 20.2 surround the magnet system 12 concentrically with a defined distance.
  • the voice coil is placed and connected around the upper tube section 20.1. This arrangement is particularly advantageous because it is not necessary to fix the voice-coil-shaped voice coil during the gluing to the tube section 20.1. Rather, the voice coil 21 rests on the inner jacket 22 of the membrane 13.
  • the outer jacket of the lower pipe section 20.2 is glued to the centering membrane 23.
  • the other edge of the centering membrane 23 is attached to the speaker basket 12.
  • the magnet system 11 is covered by a dust protection cap 24 arranged on the inner contour of the membrane 13.
  • the loudspeaker 10 shown in FIG. 2 hardly differs from the loudspeaker shown in FIG. 1, so that the reference numerals used in FIG. 1 can also be largely adopted in FIG. 2.
  • the pipe section 20 is different extends only in one direction, namely towards the bottom 17 of the speaker basket 12.
  • the overall depth of the loudspeaker 10 is also less as a result, since the pipe section 20.2 required for fastening the centering membrane 23 in FIG. 1 is omitted or is taken over from the outer jacket of the pipe section 20 in FIG.
  • FIG. 2 This reduction in the overall depth of the loudspeaker 10 is particularly illustrated in FIG. 2 in that the base 16, which rests on the floor 17 of the loudspeaker basket 12, has a significantly reduced overall height compared to the base 16 in FIG. Furthermore, the end of the pipe section 20 facing the bottom 17 of the loudspeaker basket has a flange 25 angled at right angles to the casing of the pipe section 20. This flange 25 serves as a support for the strapless voice coil 21 inserted along the inner contour of the tube section 20 during the time in which the adhesive for bonding the voice coil 21 and the tube section 20 cures.

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)
EP92112916A 1991-09-13 1992-07-29 Système de bobine mobile pour des transducteurs électromagnétiques Expired - Lifetime EP0531691B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4130460 1991-09-13
DE4130460A DE4130460A1 (de) 1991-09-13 1991-09-13 Elektromagnetischer wandler

Publications (3)

Publication Number Publication Date
EP0531691A2 true EP0531691A2 (fr) 1993-03-17
EP0531691A3 EP0531691A3 (en) 1994-07-20
EP0531691B1 EP0531691B1 (fr) 1997-06-04

Family

ID=6440512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92112916A Expired - Lifetime EP0531691B1 (fr) 1991-09-13 1992-07-29 Système de bobine mobile pour des transducteurs électromagnétiques

Country Status (7)

Country Link
US (1) US5424496A (fr)
EP (1) EP0531691B1 (fr)
JP (1) JPH05219592A (fr)
CZ (1) CZ281356B6 (fr)
DE (2) DE4130460A1 (fr)
DK (1) DK0531691T3 (fr)
PL (1) PL169087B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0610769A2 (fr) * 1993-02-02 1994-08-17 Kabushiki Kaisha Kenwood Haut-parleur
EP0835040A1 (fr) * 1992-03-31 1998-04-08 Kabushiki Kaisha Kenwood Haut-parleur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4317775C2 (de) * 1993-02-03 1995-02-02 Foster Electric Co Ltd Lautsprecher
US5734734A (en) * 1995-12-29 1998-03-31 Proni; Lucio Audio voice coil adaptor ring
DE19604088C2 (de) * 1996-02-06 1999-04-22 Alfred Ziegenberg Magnetelektrodynamisches Parallelaxialantriebssystem für Lautsprecher
SE506979C2 (sv) * 1996-07-08 1998-03-09 Nokia Audio & Electronics Ab Elektromagnetisk omvandlare och sätt att montera den
IT1296539B1 (it) * 1997-11-06 1999-07-09 Macklaine Di Francesco Di Summ Altoparlante a bobina mobile.
US6501844B2 (en) 2000-12-08 2002-12-31 Jl Audio, Inc. Loudspeaker and method of assembling same
JP4677341B2 (ja) * 2005-12-21 2011-04-27 パイオニア株式会社 スピーカー装置及び携帯電話機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730305C1 (de) * 1987-09-10 1989-03-23 Daimler Benz Ag Lautsprecher
WO1990004317A1 (fr) * 1988-10-03 1990-04-19 Harman International Industries, Incorporated Structure de transducteur electrodynamique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU523540A1 (ru) * 1975-01-08 1976-07-30 Специальное Конструкторское Бюро Кировского Завода Радиоизделий Электроакустический преобразователь
JPH01295598A (ja) * 1988-02-26 1989-11-29 Yasuhiro Shinjiyou スピーカー
DE4021651C1 (fr) * 1990-07-07 1991-06-27 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730305C1 (de) * 1987-09-10 1989-03-23 Daimler Benz Ag Lautsprecher
WO1990004317A1 (fr) * 1988-10-03 1990-04-19 Harman International Industries, Incorporated Structure de transducteur electrodynamique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0835040A1 (fr) * 1992-03-31 1998-04-08 Kabushiki Kaisha Kenwood Haut-parleur
EP0610769A2 (fr) * 1993-02-02 1994-08-17 Kabushiki Kaisha Kenwood Haut-parleur
EP0610769A3 (fr) * 1993-02-02 1994-10-12 Kenwood Corp Haut-parleur.

Also Published As

Publication number Publication date
EP0531691B1 (fr) 1997-06-04
CZ281356B6 (cs) 1996-09-11
PL169087B1 (pl) 1996-05-31
DE59208565D1 (de) 1997-07-10
PL295717A1 (en) 1993-04-19
CZ280992A3 (en) 1993-03-17
US5424496A (en) 1995-06-13
DK0531691T3 (da) 1997-10-27
DE4130460A1 (de) 1993-03-18
EP0531691A3 (en) 1994-07-20
JPH05219592A (ja) 1993-08-27

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