EP0480160B1 - Haut-parleur haute fréquence en forme de calotte - Google Patents

Haut-parleur haute fréquence en forme de calotte Download PDF

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Publication number
EP0480160B1
EP0480160B1 EP91114500A EP91114500A EP0480160B1 EP 0480160 B1 EP0480160 B1 EP 0480160B1 EP 91114500 A EP91114500 A EP 91114500A EP 91114500 A EP91114500 A EP 91114500A EP 0480160 B1 EP0480160 B1 EP 0480160B1
Authority
EP
European Patent Office
Prior art keywords
housing part
magnet pot
pot
diaphragm
piece
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
EP91114500A
Other languages
German (de)
English (en)
Other versions
EP0480160A3 (en
EP0480160A2 (fr
Inventor
Ulrich Kizak
Kurt Leipold
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 EP0480160A2 publication Critical patent/EP0480160A2/fr
Publication of EP0480160A3 publication Critical patent/EP0480160A3/de
Application granted granted Critical
Publication of EP0480160B1 publication Critical patent/EP0480160B1/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped

Definitions

  • the invention is concerned with the reduction of dome tweeters.
  • dome tweeters have been known for some time in the prior art and are used in large quantities for a wide range of applications where high-frequency sound signals have to be reproduced.
  • These known loudspeakers have in common that they have a magnetic pot in which a pole core is inserted centrally and at a distance from the inner surface of the magnetic pot.
  • the voice coil projects at this distance between the pole core and the inner surface of the magnetic pot.
  • the end of the voice coil facing away from the magnetic pot is connected to an approximately hemispherical membrane.
  • the voice coil is held centrally on the pole core by a centering membrane.
  • the membrane and centering membrane are usually designed as a one-piece component.
  • the magnetic pot is connected to a housing part, which, moreover, covers the membrane and the centering membrane on the side facing away from the magnetic pot.
  • the membrane is usually glued into the housing part.
  • the connection of the magnetic pot and the housing part is conventionally implemented as an adhesive connection.
  • the housing part can have acoustic equalizers in the area of the sound passage openings.
  • loudspeakers are known from DE-A-2 556 639, in which, in order to equalize the forces acting on the peripheral edge of the membrane, the peripheral edge is clamped between two edges by two housing parts which can be locked together. In order to rule out that the connection between the two housing parts is released under the weight of the magnet system, the one housing part that receives the magnet system is pot-shaped.
  • loudspeakers of the type described above are to be used to reproduce high-frequency tones, these usually have diaphragm diameters or voice coil diameters of approximately 19 to 25 millimeters (see, for example, Funkschau 1983, number 7, page 99, page 100). These diameters require an appropriately large-sized magnetic pot with outside diameters of around 35 to 45 millimeters for acceptable sound reproduction. If the dome tweeter is to be reduced in size due to cramped installation conditions, this is not simply possible by simply reducing the diameter of the voice coil or magnetic pot. This is due to the fact that even with a reduced voice coil diameter, the size of the magnetic pot can only be reduced to a smaller extent. A Improvement is achieved in that the pole core is partially formed from a high-energy material.
  • the loudspeaker can still be too large for very cramped installation conditions. This is due to the fact that the edge of the membrane, which is provided for gluing to the housing part, must be designed to be relatively wide in order to meet the requirements of a sufficient adhesive connection. But even if you ignore the effect of the width of the adhesive edge on the size of the loudspeaker, it has been shown in conventionally constructed loudspeakers with a voice coil diameter ⁇ 19 mm that the efficiency of these reduced loudspeakers decreases sharply.
  • the invention is therefore based on the object of specifying a dome tweeter loudspeaker which, with good efficiency, has a magnetic pot outer diameter of less than or equal to 25 millimeters.
  • the diameter of the voice coil is ⁇ 19 mm
  • the housing part is connected to the magnetic pot exclusively by means of snappers arranged on the housing edge, in which the snap-on devices, with their molded-on latching hooks, engage around a collar arranged on the outer surface of the magnetic pot that the one-piece membrane is fixed in position between the housing part and the magnetic pot only after the magnetic pot has latched in that the part of the membrane, which rests on the magnetic pot, is pressed onto the magnetic pot by means of the free end of the tube piece arranged on the housing part and that joining aids are arranged on the outer surface of the magnetic pot and on the inner surface of the housing part in the area in which the two components overlap.
  • dome tweeters are designed in accordance with the invention, they can even be connected together with another loudspeaker as a coaxial loudspeaker arrangement due to their reduced size for further space savings.
  • the joining aids ensure that an exact positioning of the magnetic pot in the housing part or the exact positioning of the housing part on the magnetic pot is ensured. In addition, a change in position of the magnetic pot in the housing part during operation of the loudspeaker is excluded by the joining aid.
  • Dome tweeter 10 are essentially formed by a one-piece housing part 11 made of plastic and a magnetic pot 12.
  • a pole core 14 is arranged in the interior of the magnetic pot 12, centered on the central axis of the loudspeaker 10 and at a distance from the inner surfaces 13 of the magnetic pot 12.
  • This pole core 14 is formed by an upper pole plate 15 and a disk 17 interposed between the pole plate 15 and the bottom 16 of the magnetic pot 12.
  • the disk 17 consists of a magnetically high-energy material.
  • the voice coil 19 projects into the distance 18 between the pole core 14 and the inner surface 13 of the magnetic pot 12.
  • a hemispherical membrane 21 is connected to the circumference 20 of the voice coil 19, which faces away from the bottom 16 of the magnetic pot 12, and thus covers the pole core 14.
  • the membrane is surrounded on its outer circumference by a wave-shaped edge, the so-called centering membrane 22, the outer edge of this centering membrane 22 standing on the edge 23 of the magnet pot 12.
  • This centering membrane 22 has the task of centering the voice coil 19 at a distance 18 between the pole core 14 and the inner surface 13 of the magnetic pot.
  • the membrane 21 and the centering membrane 22 are formed in one piece from a plastic film.
  • the side of the magnetic pot facing away from the bottom 16 of the magnetic pot 12 is covered together with the membrane 21 and the centering membrane 22 by an approximately cup-shaped housing part 11, the housing edge 24 encasing a circumferential collar 25 arranged on the outer surface of the magnetic pot 12.
  • the cover 26 of the housing part 11 has a sound outlet opening 27 opposite the membrane 21 on.
  • This opening 27 is conical and has its largest diameter on the side facing away from the magnet pot 12.
  • a pipe piece 28 running centrally to the central axis of the loudspeaker, the free end 29 of which stands on the edge 23 of the magnetic pot 12 when the housing part 11 and the magnetic pot 12 are connected.
  • the centering membrane 22 has a circumferential flange which, when the housing part 11 and the magnet pot 12 are assembled, is pressed from the free end 29 of the tube piece 28 onto the upper edge 23 of the magnet pot 12. In this case, there is no separate connection of the centering membrane 22 on the edge 23 of the magnet pot 12.
  • the connection of the magnet pot 12 and the housing part 11 is made Simplified further, since simply inserting the centering membrane 22 and the membrane 21 connected to it and the voice coil 19 means that the two last-mentioned components are already precisely positioned at the distance 18 between the magnet pot 12 and the pole core 14.
  • An acoustic equalizer 30 is arranged centrally in the sound passage opening 27 and connected to the edge of the opening 27 by webs 31.
  • the housing edge 24, which surrounds part of the outer lateral surface of the magnetic pot 12, has a plurality of spring-shaped catches 32 on its lateral surface. As illustrated in FIG. 3, these are each represented by two parallel and in the direction of the cover 26 extending slots 33 formed. The free end 34 of this catch 32 is provided with locking hooks 35.
  • the collar 25 arranged on the outer surface of the magnetic pot 12 causes the catches 32 to deflect elastically in the direction of the arrow .
  • suitable joining aids 36 must be arranged on the collar 25 and on the inner lateral surface of the housing edge 24 along the central axis of the loudspeaker 10, as illustrated in FIG. 2 .
  • the joining aids 36 illustrated in FIG. 2 are only examples. However, if joining aids 36 are provided, the magnet pot 12 is also fixed in position in the radial direction in the housing part 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Claims (1)

  1. Haut-parleur d'aigus à calottes (10),
    - avec un pot magnétique (12)
       - avec un noyau polaire (14),
          - qui est formé d'une plaque polaire supérieure (15) et d'un disque hautement énergétique (17) placé entre la plaque polaire supérieure (15) et le fond (16) du pot magnétique (12), et
    - - qui est placé à une distance (18) de la surface intérieure du pot magnétique (12), au centre du pot magnétique,
    - avec une membrane d'une seule pièce (21),
    - dont la région médiane est de forme à peu près hémisphérique, et
    - dont la région périphérique est conformée en membrane de centrage (22),
    - avec une bobine mobile (19),
    - qui est fixée dans la région de transition de la membrane de centrage (22) à la région médiane de la membrane (21), et
    - qui dépasse avec son extrémité libre dans l'intervalle (18) entre la surface intérieure du pot magnétique (12) et le noyau polaire (14), et
    - avec une partie formant boîtier (11) d'une seule pièce,
    - laquelle recouvre la partie médiane de la membrane (21) et la membrane de centrage (22),
    - dispose d'égaliseurs acoustiques (30) dans la région de la forme semi-circulaire de la membrane (21), et
    - qui est relié au pot magnétique (12), caractérisé en ce que,
    - le diamètre de la bobine mobile (19) est inférieur à 19 mm,
    - la partie formant boîtier (11) est reliée au pot magnétique (12) exclusivement au moyen de loqueteaux faisant ressort (32) placés à la périphérie (24) de la partie formant boîtier, les loqueteaux (32) entourant avec leurs crans moulés (35) une collerette (25) placée sur la surface extérieure du pot magnétique (12),
    - après l'enclenchement du pot magnétique (12) et de la partie formant boîtier (11), la membrane (21) d'une seule pièce est maintenue en position entre la partie formant boîtier (11) et le pot magnétique (12) exclusivement par le fait que la partie de la membrane (21) qui repose sur le pot magnétique (12) est pressée sur le pot magnétique (12) au moyen de l'extrémité libre (29) du tronçon de tube (28) placé sur la partie formant boîtier (11),
    - des auxiliaires de montage (36) sont placés sur la surface extérieure du pot magnétique (12) et sur la surface intérieure de la partie formant boîtier (11) à chaque fois dans la région où les deux éléments se chevauchent.
EP91114500A 1990-10-06 1991-08-29 Haut-parleur haute fréquence en forme de calotte Expired - Lifetime EP0480160B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4031742A DE4031742A1 (de) 1990-10-06 1990-10-06 Kalotten-hochton-lautsprecher
DE4031742 1990-10-06

Publications (3)

Publication Number Publication Date
EP0480160A2 EP0480160A2 (fr) 1992-04-15
EP0480160A3 EP0480160A3 (en) 1993-01-13
EP0480160B1 true EP0480160B1 (fr) 1995-07-26

Family

ID=6415769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114500A Expired - Lifetime EP0480160B1 (fr) 1990-10-06 1991-08-29 Haut-parleur haute fréquence en forme de calotte

Country Status (4)

Country Link
US (1) US5150419A (fr)
EP (1) EP0480160B1 (fr)
JP (1) JPH04264900A (fr)
DE (2) DE4031742A1 (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3007469B2 (ja) * 1992-01-30 2000-02-07 東北パイオニア株式会社 スピーカ磁気回路
JP2905350B2 (ja) * 1992-11-18 1999-06-14 スター精密 株式会社 電気音響変換器
AT398355B (de) * 1993-02-26 1994-11-25 Koninkl Philips Electronics Nv Elektroakustischer wandler mit einem abschlussteil
FR2735646B1 (fr) * 1995-06-16 1997-08-22 Phl Audio Haut-parleur pour frequences elevees
DE29512102U1 (de) * 1995-07-27 1995-10-05 Nokia (Deutschland) Gmbh, 75175 Pforzheim Magnetsystem
GB2322503B (en) * 1997-02-25 2000-11-01 Celestion Int Ltd Compression driver
GB9712964D0 (en) * 1997-06-19 1997-08-27 Goodmans Loudspeakers Limited Loudspeakers
DE19732185A1 (de) * 1997-07-26 1999-01-28 Nokia Deutschland Gmbh Lautsprecherkorb
JP3610774B2 (ja) * 1998-04-28 2005-01-19 松下電器産業株式会社 スピーカ
ATE446651T1 (de) 1998-07-21 2009-11-15 Harman Int Ind Miniaturisierter breitbandlautsprecher
JP4122602B2 (ja) * 1998-11-19 2008-07-23 ソニー株式会社 スピーカー装置
GB2359213B (en) 1999-10-29 2004-05-19 Kef Audio High frequency transducer
JP2001169386A (ja) * 1999-10-29 2001-06-22 Kh Technology Corp 放射ダイアフラムおよび高周波トランスデューサ
JP3619736B2 (ja) * 2000-02-25 2005-02-16 スター精密株式会社 スピーカ
JP2002152885A (ja) * 2000-11-14 2002-05-24 Sony Corp スピーカ装置
JP4557412B2 (ja) * 2000-11-20 2010-10-06 パナソニック株式会社 スピーカ
DE10207561C1 (de) * 2002-02-22 2003-07-24 Harman Becker Automotive Sys Kalottenlautsprecher
DE102006021552A1 (de) * 2006-05-08 2007-11-15 Robert Bosch Gmbh Kalotten-Lautsprecher
WO2009012783A2 (fr) * 2007-07-25 2009-01-29 Lars Goller Holding Aps Membrane de haut-parleur d'aigus à cône
US8374379B2 (en) * 2007-08-30 2013-02-12 Jl Audio, Inc. Loudspeaker with replaceable motor assembly
US20150139475A1 (en) * 2013-11-20 2015-05-21 Kai Shuai Industrial Co., Ltd. Speaker decorative rim mounting structure
DE202014001433U1 (de) * 2014-02-19 2015-02-20 Harman Becker Automotive Systems Gmbh Lautsprecher
DE202014003034U1 (de) * 2014-04-02 2015-04-07 Harman Becker Automotive Systems Gmbh Lautsprecher
US9154864B1 (en) * 2014-04-30 2015-10-06 Harman International Industries, Inc. Speaker assembly
US9723410B2 (en) * 2014-07-08 2017-08-01 Harman International Industries, Incorporated Speaker assembly
US9584921B2 (en) * 2014-07-15 2017-02-28 Nokia Technologies Oy Sound transducer
CN104105035B (zh) * 2014-07-22 2018-10-09 慈溪市奇炳电子有限公司 一种高音驱动头
CN207070342U (zh) * 2017-07-18 2018-03-02 歌尔科技有限公司 一种扬声器
JP7243354B2 (ja) * 2019-03-22 2023-03-22 株式会社Ｊｖｃケンウッド ドーム型振動板、バランスドドーム振動板及びスピーカ
US12081956B2 (en) 2022-09-21 2024-09-03 Harman International Industries, Incorporated Speaker assembly with mechanically-coupled magnet

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US3358089A (en) * 1964-06-10 1967-12-12 Gen Electric Magnet assembly
CA1049133A (fr) * 1974-12-16 1979-02-20 Matsushita Electric Industrial Co., Ltd. Haut-parleur
FR2428952A3 (fr) * 1978-04-03 1980-01-11 Audax Haut-parleur electrodynamique a membrane convexe
DE2905566A1 (de) * 1979-02-14 1980-08-28 Standard Elektrik Lorenz Ag Universelles kalottenlautsprecher- bauelement
US4421956A (en) * 1981-09-29 1983-12-20 Peavey Electronics Corp. Loud speaker with minimized magnetic leakage
US4565905A (en) * 1982-04-28 1986-01-21 International Jensen Incoporated Loudspeaker construction
DE3241898A1 (de) * 1982-11-12 1984-07-19 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Elektrodynamischer wandler
US4591667A (en) * 1984-03-06 1986-05-27 Onkyo Kabushiki Kaisha Dome speaker with cut-out portions in the voice coil bobbin
DE3831706A1 (de) * 1988-09-17 1990-03-22 Bayer Ag Membran fuer lautsprecher

Also Published As

Publication number Publication date
EP0480160A3 (en) 1993-01-13
EP0480160A2 (fr) 1992-04-15
US5150419A (en) 1992-09-22
DE59106080D1 (de) 1995-08-31
DE4031742A1 (de) 1992-04-09
JPH04264900A (ja) 1992-09-21

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