EP1079664A2 - Moteur électrodynamique - Google Patents

Moteur électrodynamique Download PDF

Info

Publication number
EP1079664A2
EP1079664A2 EP00118512A EP00118512A EP1079664A2 EP 1079664 A2 EP1079664 A2 EP 1079664A2 EP 00118512 A EP00118512 A EP 00118512A EP 00118512 A EP00118512 A EP 00118512A EP 1079664 A2 EP1079664 A2 EP 1079664A2
Authority
EP
European Patent Office
Prior art keywords
driver according
electrodynamic driver
adapter
cavities
cavity
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
EP00118512A
Other languages
German (de)
English (en)
Other versions
EP1079664B1 (fr
EP1079664A3 (fr
Inventor
Wolfgang Dr. Bachmann
Gerhard Dr. Krump
Hans-Jürgen Regl
Andreas Ziganki
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
Harman Becker Automotive Systems GmbH
Harman Audio Electronic Systems 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 Harman Becker Automotive Systems GmbH, Harman Audio Electronic Systems GmbH filed Critical Harman Becker Automotive Systems GmbH
Publication of EP1079664A2 publication Critical patent/EP1079664A2/fr
Publication of EP1079664A3 publication Critical patent/EP1079664A3/fr
Application granted granted Critical
Publication of EP1079664B1 publication Critical patent/EP1079664B1/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
    • H04R9/066—Loudspeakers using the principle of inertia
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion

Definitions

  • the invention relates to an electrodynamic driver for a membrane with one on a tubular coil support applied voice coil, one with respect to the voice coil concentrically arranged, axially movable magnet system, an adapter for attaching the coil carrier to the membrane, one arranged between the membrane and the magnet system elastic element, with at least one cavity between Forms membrane and magnet system.
  • Record speakers essentially consist of a bracket (Frame), a membrane (plate) and a drive system.
  • the drive system of the plate loudspeaker consists of one or more electromechanical transducers.
  • As a converter only piezoelectric drivers (PVDF foils or Piezo-ceramics) or electrodynamic drivers (Magnetic system / oscillating head) for use.
  • the oscillating head of the electrodynamic driver consists of the voice coil, the coil support, an elastic element and the adapter. Any one for anchoring becomes an adapter of the coil carrier on the plate suitable connecting element designated.
  • a generic driver is e.g. from European Patent EP 0 847 676 B1 known. The transmission quality of the drivers will be different for some However, applications are still considered too small.
  • the object of the invention is an electrodynamic driver to further improve the type mentioned at the beginning.
  • the one voice coil mounted on a tubular coil support, a concentrically arranged with respect to the voice coil, axially movable magnet system, an adapter for fastening of the coil carrier on the membrane and one between the membrane and have a magnet system arranged elastic element
  • Cavities usually form between the membrane and the magnet system.
  • Air-permeable elements can be used to equalize the pressure (e.g. coarse-pored tissue, fleece) that with the outside air in Contact is established and / or pressure compensation channels (e.g. bore, Grooves, notch) leading from the cavity to the outside air become.
  • at least one cavity can have a pressure compensation opening (e.g. windows, slots) to the outside air.
  • means for pressure compensation can also be used be provided between at least two cavities. These can again have air-permeable elements and / or Pressure equalization channels can be connected to one another and / or one have common pressure equalization opening.
  • the pressure equalization openings can be elastic Element introduced.
  • an elastic element circumferential bead are provided, the at least one Has pressure equalization opening and / or is air-permeable.
  • the magnet system and / or the adapter can (also) at least one at least in contact with a cavity standing pressure equalization opening and / or a pressure equalization channel exhibit.
  • the pressure equalization openings explained above serve on the one hand dynamic and static pressure equalization. They also provide cooling for the driver system.
  • a tubular coil support 8a, on which a coil 8 is wound is, by means of an adapter plate 9a and one Adapter foot 9b existing, concentric, one-piece Adapters 9 attached to a plate membrane 12.
  • the plate membrane 12 is opposite in the axial direction of the coil carrier 8a with a coil 8 arranged a magnet system, which forms an air gap 18 in which the coil 8 and partially immerse the coil carrier 8a.
  • the magnet system consists of a ferro-magnetic magnetic pot 4, the the coil 8 on its outer surface and on that of the plate membrane 12 encloses opposite cross-sectional area, and from inside the magnetic pot 4 and the coil carrier 8a arranged permanent magnets 5 in connection with a pole disk 6.
  • the load bead 2 has the task of the magnet system (magnetic pot 4, permanent magnet 5 and pole disc 6) on the plate membrane 12 to fix (for axial movement soft spring, for radial and Tilting movements hard resilient).
  • the load bead 2 could also extend further outwards from the outer edge of the magnet system or further inside. But you could also with one other types of bracket are completely eliminated.
  • the centering bead 7 in turn has Task, the oscillating head (voice coil 8, coil support 8a and Fix adapter 9) to the magnet system (for axial movement soft resilient, hard resilient for radial and tilting movements).
  • the centering bead 7 could also be from the outer edge of the Extend the oscillating head further outwards or further inwards. With a different type of holder, it could also be whole omitted.
  • the load bead 2 from an independent component.
  • it can also Be part of the housing 3 itself, if this is made of compound material exists in which the receiving the magnet system Housing part hard and the load bead part to For the purpose of cushioning is made of softer material.
  • Another cavity (housing chamber 11) is through the housing 3, the centering bead 7, the adapter 3, the voice coil 8 with the coil holder 8a and the air gap 18 are defined.
  • a magnetic chamber 10 are mentioned Cavity through the magnetic pot 4, the permanent magnet 5, the Pole disk 6, the voice coil 8 with coil carrier 8a and enclosed the air gap 18 and a pole chamber 13 called Cavity through adapter 9, the coil holder 8a and the pole disc 6 fixed, wherein in the embodiment axial height hp of the pole chamber 13 advantageously less is as the free height hm in the magnetic chamber 10.
  • Another Cavity adapter chamber 15 is finally from the adapter 9 formed in connection with the plate membrane 12.
  • Pressure compensation takes place from the crimp chamber 17 the housing chamber 11 and the adapter chamber 15 is the centering bead 7 made of air-permeable material, for example made from coarse-pored elastic fabric, which has a plurality of small pressure equalization openings 20.
  • the adapter 9 has a bore that extends from the bead chamber 17 leads to the adapter chamber 15 and as a pressure compensation opening 16 serves between these two chambers.
  • a pressure equalization opening 14 is provided, the pole chamber 13 also with the housing chamber 11 via a pressure equalization opening 21 serving bore in the coil holder 8a connected is. Since the air gap 18 usually one too has a small effective cross section for pressure equalization, is a bore provided as a pressure compensation opening 24 in the magnetic pot 4 introduced such that this the magnetic chamber 10 connects to the outside air. This creates two cavities directly in contact with the outside air while the remaining cavities indirectly at least through these two and possibly also further cavities also with the Outside air contact. This ensures that in there is always external pressure in all cavities.
  • Such pressure equalization openings are in particular also advantageous, even necessary if ferrofluid is in the air gap is used, which would prevent pressure equalization.
  • pressure equalization openings and cavities can also have holes or other recesses in the housing, be provided in the membrane or the pole disk. These holes and recesses also serve as an introduction already mentioned the cooling of the interior of the housing.
  • the pole disk 6 is in the embodiment 2 is T-shaped in cross section and is shown in FIG Contact with a combined weight and load bead 23, in which is an adapter foot 23a, an adapter head 23c and a intervening flexible adapter intermediate ring 23c incorporated are.
  • the adapter with adapter foot 23a, adapter head part 23c and adapter intermediate ring 23c are used for fastening the driver on the sound plate 12.
  • Cavities are formed in particular in this embodiment inside the adapter (adapter chamber 15), between adapter, Voice coil 8 and pole disc 6 (pole chamber 13) and between Pole disk 6, permanent magnet 5 and magnetic pot 4 (magnetic chamber 10).
  • a pressure equalization opening 14 there are adapter chambers 15 and pole chamber 13 connected to each other, wherein the adapter chamber 15 via a pressure equalization opening at 16 is in contact with the outside air.
  • the pressure equalization of the In addition to the air gap 18, the magnetic chamber 10 also takes place by means of a pressure compensation opening formed by a hole in the magnetic pot 24, Finally, could be optional - as with Embodiment according to Figure 1 - also through a hole the coil former 8a is provided as a pressure compensation opening 21 are (not shown in Figure 2).

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electric Cable Installation (AREA)
EP00118512A 1999-08-27 2000-08-25 Moteur électrodynamique Expired - Lifetime EP1079664B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19940930 1999-08-27
DE19940930A DE19940930A1 (de) 1999-08-27 1999-08-27 Elektrodynamischer Treiber

Publications (3)

Publication Number Publication Date
EP1079664A2 true EP1079664A2 (fr) 2001-02-28
EP1079664A3 EP1079664A3 (fr) 2007-03-07
EP1079664B1 EP1079664B1 (fr) 2011-10-19

Family

ID=7919954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00118512A Expired - Lifetime EP1079664B1 (fr) 1999-08-27 2000-08-25 Moteur électrodynamique

Country Status (3)

Country Link
EP (1) EP1079664B1 (fr)
AT (1) ATE530030T1 (fr)
DE (1) DE19940930A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2884486A3 (fr) * 2013-12-11 2015-08-05 Yamaha Corporation Structure d'installation pour transducteur acoustique
US20160212526A1 (en) * 2013-09-30 2016-07-21 Apple Inc. Waterproof Speaker Module
EP2577994A4 (fr) * 2010-06-07 2017-11-15 Katz, Robert Transducteur acoustique à dissipation thermique doté de moyens de montage
CN109348375A (zh) * 2018-11-29 2019-02-15 深圳倍声声学技术有限公司 一种动铁扬声器和耳机
US10209123B2 (en) 2016-08-24 2019-02-19 Apple Inc. Liquid detection for an acoustic module
US10425738B2 (en) 2014-04-30 2019-09-24 Apple Inc. Evacuation of liquid from acoustic space

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1410680B1 (fr) 2001-07-13 2010-12-15 Harman Becker Automotive Systems GmbH Haut-parleur a plaque

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919884A1 (de) * 1978-05-17 1979-11-22 Bodysonic Kk Elektromechanischer schwingungswandler fuer den tonfrequenzbandbereich, mit diesem koppelbare schaltungsanordnung, mit diesem verwendbare tonschwingungseinrichtung, mit diesem verbindbare tonvorrichtung und mit diesem verwendbarer mechanischer schwingungserzeuger
US5426707A (en) * 1990-10-09 1995-06-20 Laine B. V. Electrodynamic loudspeaker with cooling arrangement
DE4421418A1 (de) * 1994-06-01 1995-12-07 Nokia Deutschland Gmbh Zentriermembran
US5497428A (en) * 1994-11-01 1996-03-05 Rojas; Omar E. Self-cooled magnetic structure for loudspeakers
US5909015A (en) * 1998-03-26 1999-06-01 Yamamoto; Shuji Self-cooled loudspeaker

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039740B1 (fr) * 1979-11-09 1985-06-26 Matsushita Electric Industrial Co., Ltd. Haut-parleur
DE3923189A1 (de) * 1989-07-13 1991-01-24 Atl Elektro Akustik Vertriebs Lautsprecher

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919884A1 (de) * 1978-05-17 1979-11-22 Bodysonic Kk Elektromechanischer schwingungswandler fuer den tonfrequenzbandbereich, mit diesem koppelbare schaltungsanordnung, mit diesem verwendbare tonschwingungseinrichtung, mit diesem verbindbare tonvorrichtung und mit diesem verwendbarer mechanischer schwingungserzeuger
US5426707A (en) * 1990-10-09 1995-06-20 Laine B. V. Electrodynamic loudspeaker with cooling arrangement
DE4421418A1 (de) * 1994-06-01 1995-12-07 Nokia Deutschland Gmbh Zentriermembran
US5497428A (en) * 1994-11-01 1996-03-05 Rojas; Omar E. Self-cooled magnetic structure for loudspeakers
US5909015A (en) * 1998-03-26 1999-06-01 Yamamoto; Shuji Self-cooled loudspeaker

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2577994A4 (fr) * 2010-06-07 2017-11-15 Katz, Robert Transducteur acoustique à dissipation thermique doté de moyens de montage
US20160212526A1 (en) * 2013-09-30 2016-07-21 Apple Inc. Waterproof Speaker Module
EP2884486A3 (fr) * 2013-12-11 2015-08-05 Yamaha Corporation Structure d'installation pour transducteur acoustique
US9591400B2 (en) 2013-12-11 2017-03-07 Yamaha Corporation Installation structure for acoustic transducer
US10425738B2 (en) 2014-04-30 2019-09-24 Apple Inc. Evacuation of liquid from acoustic space
US10750287B2 (en) 2014-04-30 2020-08-18 Apple Inc. Evacuation of liquid from acoustic space
US10209123B2 (en) 2016-08-24 2019-02-19 Apple Inc. Liquid detection for an acoustic module
CN109348375A (zh) * 2018-11-29 2019-02-15 深圳倍声声学技术有限公司 一种动铁扬声器和耳机

Also Published As

Publication number Publication date
EP1079664B1 (fr) 2011-10-19
DE19940930A1 (de) 2001-03-29
ATE530030T1 (de) 2011-11-15
EP1079664A3 (fr) 2007-03-07

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