EP0804048A2 - Haut-parleur - Google Patents

Haut-parleur Download PDF

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Publication number
EP0804048A2
EP0804048A2 EP97105524A EP97105524A EP0804048A2 EP 0804048 A2 EP0804048 A2 EP 0804048A2 EP 97105524 A EP97105524 A EP 97105524A EP 97105524 A EP97105524 A EP 97105524A EP 0804048 A2 EP0804048 A2 EP 0804048A2
Authority
EP
European Patent Office
Prior art keywords
permanent magnet
voice coil
membrane
loudspeaker according
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
EP97105524A
Other languages
German (de)
English (en)
Other versions
EP0804048A3 (fr
EP0804048B1 (fr
Inventor
Stefan Geisenberger
Gerhard Krump
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.)
Harman Becker Automotive Systems GmbH
Original Assignee
Nokia Technology 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 Technology GmbH filed Critical Nokia Technology GmbH
Publication of EP0804048A2 publication Critical patent/EP0804048A2/fr
Publication of EP0804048A3 publication Critical patent/EP0804048A3/fr
Application granted granted Critical
Publication of EP0804048B1 publication Critical patent/EP0804048B1/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
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • 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
    • H04R2209/022—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 the formation of loudspeakers, in particular with the formation of drive systems for such loudspeakers and with the mutual association of such loudspeakers.
  • magnet systems which have permanent magnets magnetized radially to the longitudinal axis of the magnet system. These permanent magnets are either made in one piece or consist of a series of permanent magnet segments. Such arrangements are known for example from WO 93/03586. In these arrangements too, yoke parts are present which guide the magnetic flux provided by the permanent magnets, so that sufficient induction is made available to the annular gap.
  • the basic idea of the present invention is to use the leakage flux emitted by a radially magnetized permanent magnet to drive a voice coil. This makes it possible to form the receiving parts for the permanent magnet from a para or diamagnetic material. This has the consequence that a considerable reduction in space and weight is achieved, since the geometrical specifications for the yoke parts, which according to the prior art have to be observed for guiding the magnetic flux within these parts, are irrelevant according to the invention.
  • the manufacture of magnet systems is also greatly simplified according to the invention, since work steps which are necessary to connect the otherwise customary yoke parts according to the prior art are omitted. Rather, the receiving part according to the invention only forms the rear end of the loudspeaker or a support structure for the permanent magnet and the other components of the loudspeaker.
  • a cone loudspeaker usually has a loudspeaker basket which is connected to the magnet system, since the receiving part according to the invention has no function with regard to the magnetic flux and should not have with regard to the use of the leakage flux, one-piece units made of the receiving part and Manufacture loudspeaker basket very inexpensively.
  • Plastics, metals and metal alloys are suitable materials for forming receiving parts or units made of receiving part and speaker basket. It is particularly advantageous to use metal to form receiving parts in the above sense, since these materials simultaneously ensure good heat dissipation in the area of the drive system of the loudspeaker.
  • a particularly effective use of the leakage flux emitted by the permanent magnet is given if the magnet system is designed according to claim 5.
  • the leakage flux emitted by the permanent magnet is used by both coils to drive a membrane.
  • the design of the loudspeaker according to claim 7 is very particularly advantageous. If the respective voice coil former is approximately tubular and the first end of this voice coil former is connected to a first membrane and the second end of this voice coil former is connected to a second membrane and the two membranes, their suspensions, etc. designed completely identical, such an arrangement can be used as a dipole emitter, for example to generate a diffuse sound field for Dolby Surround playback. Diffuse sound fields of this type are generated according to the prior art by using two completely identical loudspeakers with inverse polarity reversed polarity with separate volumes. With such arrangements, however, the desired effects can only be achieved if the two loudspeakers have a reproduction frequency response that is identical up to 1-2 dB.
  • a loudspeaker (10) is shown in section in FIG.
  • This loudspeaker (10) is essentially formed by a receiving part (11), a permanent magnet (12) and a membrane (13).
  • the receiving part (11) is formed from a loudspeaker basket (11a) and a mandrel (11b).
  • Polycarbonate was used as the material for the parts (11a and 11b). This is not restricted to this material. Rather, in another example (not shown), other plastics, such as A B S, or metals, for example aluminum, can be used as materials, provided that these materials have para- or diamagnetic properties.
  • At least the dome (11b), that is to say the part which is physically connected directly to the permanent magnet (12), is formed from a para- or diamagnetic material in order to prevent the permanent magnet (12) from directly contacting it. not weaken outgoing field.
  • Combinations are also not excluded from the invention, which have a dome (11b) made of a paramagnetic or diamagnetic material and a loudspeaker basket (11a) made of a ferro-magnetic material.
  • the mandrel (11b) shown in FIG. 1 is circular, the end of the mandrel (11b) facing away from the basket (11a) having a smaller diameter than the end near the basket (11a).
  • This design of the mandrel (11b) serves for the positive reception of the annular permanent magnet (12).
  • the mandrel (11b) does not necessarily have to completely or partially fill the inside diameter of the permanent magnet (12).
  • An embodiment in which the mandrel (11b) does not completely fill the inside diameter of the permanent magnet (12) is shown in FIG. 4.
  • a conical membrane (13) is inserted into the basket (11a) shown in FIG. 1.
  • the upper end of the membrane (13) is connected to the basket (11a) by means of a bead (14).
  • the lower end of the membrane (13) has a voice coil support (15) which projects into the space encased by the membrane (13).
  • the visual voice coil (16) is wound around the outer jacket of the voice coil former (15).
  • centering membrane (17) which is connected to the basket (11a) and the membrane (13) and which holds the voice coil (16) centrally to the longitudinal axis of the magnet system or the loudspeaker (10).
  • the mandrel (11b), the permanent magnet (12) and the voice coil (16) can be covered by a dust protection cap (18).
  • this dust protection cap (18) has the task of protecting the narrow annular gap from particle accumulations.
  • This task also has the dust protection cap (18) used in the system according to the invention, although in the systems according to the invention which use the leakage flux, the distances between the voice coil (16) and the permanent magnet (12) are not so critical, so that if the Dust protection cap is not available, the accumulating particles are of minor importance.
  • the induction of radially magnetized permanent magnets (12) along the lateral surfaces 19/20 is constant, so that the voice coil (16) moves over its entire deflection path in a homogeneous magnetic field, which ultimately leads to very linear operation of the loudspeaker ( 10) leads.
  • the permanent magnet (12) can also be formed in a cuboid shape by the stringing together of only 4 segments.
  • FIG. 3 shows a loudspeaker (10) which, in contrast to the design according to FIG. 1, has two voice coil carriers (15 and 15 '). These two voice coil carriers (15, 15 ') are connected at a mutual distance by means of an annular disc (21). In addition, each of the two voice coil carriers (15, 15 ') is provided with a voice coil (16, 16').
  • the mandrel (11b) is provided with a disk (22) which is likewise formed from a para- or diamagnetic material.
  • the underside (23) of the disc (22) is connected to a radially magnetized permanent magnet (12) in the form of a circular ring.
  • the disk (22) can also be formed from a ferro-magnetic material, although such a selection of materials leads to somewhat poorer efficiency.
  • annular permanent magnet (12) Since the inner diameter of the annular permanent magnet (12) is larger than the outer diameter of the mandrel (11b) and the two parts are constructed coaxially to one another, an "air gap” (24) is formed.
  • the voice coil support (15) connected to the coil (16) is immersed in this "air gap” (24), while the voice coil (16 ') arranged on the voice coil support (15') the outer circumferential surface (19) of the permanent magnet (12) at a distance edged.
  • the devices which are also used for producing arrangements according to DE-A-4113017 can be used without major changes.
  • the centering sleeves usually used for aligning and fastening the membrane (13) in the basket (11a), which are used to produce loudspeakers (10) between the pole core ⁇ mandrel (11b) and permanent magnet (12) ⁇ and the Voice coil former (15) are used.
  • FIG. 4 In contrast to the representation according to FIG. 1, the permanent magnet ring (12) is placed on the mandrel (11b). Between the inner circumferential surface (20) of the radially magnetized permanent magnet ring (12) and the mandrel (11b) there is an "air gap" (24) into which a voice coil former (15 ') which is wound with a voice coil (16') is immersed. The upper end of the voice coil former (15 ') is provided with a dome-shaped membrane (13'). The outer edge of the dome-shaped membrane (13 ') is connected to the upper end of the permanent magnet (12).
  • both voice coils (16, 16') in this exemplary embodiment should be reversed in polarity with the audio signal source if both coils (16, 16 ') are made, for example, from manufacturing technology Have the same sense of winding.
  • FIG. 5 shows a mandrel-permanent magnet combination modified compared to FIG. 1.
  • Two permanent magnets (12, 12 ') with mutual axial spacing are provided on the mandrel (11b). Each of these permanent magnets (12, 12 ') is magnetized radially, the same poles of the two permanent magnets (12, 12') pointing in the same direction.
  • a voice coil support (16) is arranged next to the outer lateral surfaces (19) of the two permanent magnets (12, 12 '), to which two voice coils (16, 16') are also fixed at a mutual axial distance.
  • the double-dotted dashed lines that intersect the voice coil support (15) indicate that the arrangement shown in FIG. 5 can also be used to drive different membranes (13) if the two voice coils (16, 16 ') are not on a common voice coil support ( 15) are arranged, but have independent voice coil carriers (15 '').
  • mandrel (11b) according to FIG. 5 completely fills the inner diameter of the two permanent magnets (12, 12 '). Rather, the mandrel (11b) shown in FIG. 5 can also be modified in accordance with the embodiments shown in FIGS. 3 and 4.
  • a mandrel-permanent magnet combination shown in connection with FIGS. 1 and 5 can be formed very advantageously by inserting the permanent magnet (s) (12, 12 ') into an injection mold so that the permanent magnets are connected (12, 12 ') can take place simultaneously with the formation of the mandrel (11b) or the receptacle (11) consisting of mandrel (11b) and basket (11a).
  • FIG. 6 shows a dipole radiator (10 ') which shows a loudspeaker (10'') to the right and left of the double-dotted chain line.
  • Each of these loudspeakers (10 '') corresponds essentially to a loudspeaker shown in DE-A-4113017 (Fig. 1).
  • the magnet system is formed in FIG. 6. This is characterized in that it is formed by a radially magnetized permanent magnet (12). Since the first end (25) of the voice coil former (15) is connected to a membrane (13) and the second end (25 ') of the voice coil former (15) is connected to another membrane (13').
  • the permanent magnet rings (12, 12 ') shown in FIG. 5 can also be used. 6 can be modified so that, according to FIG. 4, the two diaphragms (13, 13 ') shown in FIG. 6, each of two with a lateral distance to the inner and outer lateral surface (19, 20) of the permanent magnet ( 12) arranged voice coils (16, 16 ') are driven.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Liquid Crystal (AREA)
  • Surgical Instruments (AREA)
EP97105524A 1996-04-26 1997-04-03 Haut-parleur Expired - Lifetime EP0804048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19616794 1996-04-26
DE19616794A DE19616794B4 (de) 1996-04-26 1996-04-26 Lautsprecher

Publications (3)

Publication Number Publication Date
EP0804048A2 true EP0804048A2 (fr) 1997-10-29
EP0804048A3 EP0804048A3 (fr) 2004-07-14
EP0804048B1 EP0804048B1 (fr) 2008-10-29

Family

ID=7792585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105524A Expired - Lifetime EP0804048B1 (fr) 1996-04-26 1997-04-03 Haut-parleur

Country Status (4)

Country Link
US (1) US6359997B2 (fr)
EP (1) EP0804048B1 (fr)
AT (1) ATE413081T1 (fr)
DE (2) DE19616794B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334849A (en) * 1998-02-27 1999-09-01 Simon James Norfolk The double diaphragm loudspeaker
EP1553802A3 (fr) * 2004-01-06 2009-06-17 Sony Corporation Circuit magnétique et haut-parleur
EP3443753A4 (fr) * 2016-04-15 2019-11-06 Harman International Industries, Incorporated Système de suspension et moteur de haut-parleur

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
US5802191A (en) * 1995-01-06 1998-09-01 Guenther; Godehard A. Loudspeakers, systems, and components thereof
US8588457B2 (en) 1999-08-13 2013-11-19 Dr. G Licensing, Llc Low cost motor design for rare-earth-magnet loudspeakers
AU2001270247A1 (en) * 2000-06-27 2002-01-08 Godehard A. Guenther Low profile speaker and system
GB2377849A (en) * 2001-07-21 2003-01-22 Kh Technology Corp Loudspeaker drive units with smooth transition to surround
US7570774B2 (en) * 2004-05-25 2009-08-04 Estec Corporation Speaker having improved sound-radiating function to both directions
EP1790192A4 (fr) 2004-09-09 2010-06-02 Godehard A Guenther Haut-parleurs et systemes
US7706563B2 (en) * 2005-12-19 2010-04-27 Harman International Industries, Incorporated Concentric radial ring motor
US20070297639A1 (en) * 2006-06-21 2007-12-27 Noll Michael A Multiple magnet loudspeaker
US8189840B2 (en) 2007-05-23 2012-05-29 Soundmatters International, Inc. Loudspeaker and electronic devices incorporating same
FR2956274B1 (fr) * 2010-02-10 2017-06-09 Renault Sas Structure de transducteur electrodynamique et son procede de fabrication
FR2960738B1 (fr) * 2010-05-28 2015-09-25 Focal Jmlab Haut-parleur acoustique
DE102010045290B4 (de) * 2010-09-14 2016-04-28 Günther Zimmer Vereinzler mit elektrodynamischem Stellglied
US8836276B2 (en) * 2011-03-07 2014-09-16 Eldon Technology Limited Charging batteries for electronic devices by talking
CN102821342A (zh) * 2011-06-10 2012-12-12 宁波升亚电子有限公司 一种扬声器
ITPD20110191A1 (it) * 2011-06-13 2012-12-14 Maurizio Servadio Trasduttore elettromeccanico/elettroacustico sottile
FR3015671B1 (fr) * 2013-12-23 2020-03-20 Safran Helicopter Engines Ensemble pour turbomachine pour mesurer des vibrations subies par une pale en rotation
CN105025421A (zh) * 2014-04-17 2015-11-04 有限会社左尔佐 扬声器
CN108513238A (zh) * 2018-05-22 2018-09-07 黄清山 一种鼓纸及具有该鼓纸的喇叭
CN108632728B (zh) 2018-06-25 2020-08-11 歌尔股份有限公司 发声器件及便携终端

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JPH01258589A (ja) * 1988-04-08 1989-10-16 Shicoh Eng Co Ltd 動電型電気音響交換器

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US3679833A (en) * 1968-07-18 1972-07-25 Inoue K Loudspeaker system
DE2709972A1 (de) * 1977-03-08 1978-09-14 Wilhelm Dr Ing Lepper Neuer dynamischer lautsprecher
US4327257A (en) * 1979-09-10 1982-04-27 Schwartz Leslie H Alignment device for electro-acoustical transducers
JPH01258589A (ja) * 1988-04-08 1989-10-16 Shicoh Eng Co Ltd 動電型電気音響交換器

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334849A (en) * 1998-02-27 1999-09-01 Simon James Norfolk The double diaphragm loudspeaker
GB2334849B (en) * 1998-02-27 2001-02-28 Simon James Norfolk The double diaphragm
EP1553802A3 (fr) * 2004-01-06 2009-06-17 Sony Corporation Circuit magnétique et haut-parleur
EP3443753A4 (fr) * 2016-04-15 2019-11-06 Harman International Industries, Incorporated Système de suspension et moteur de haut-parleur

Also Published As

Publication number Publication date
DE19616794B4 (de) 2005-09-29
US6359997B2 (en) 2002-03-19
EP0804048A3 (fr) 2004-07-14
DE19616794A1 (de) 1997-10-30
ATE413081T1 (de) 2008-11-15
EP0804048B1 (fr) 2008-10-29
DE59712977D1 (de) 2008-12-11
US20010043715A1 (en) 2001-11-22

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