EP0193886A2 - Membrane pour haut-parleur plan - Google Patents

Membrane pour haut-parleur plan Download PDF

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Publication number
EP0193886A2
EP0193886A2 EP86102605A EP86102605A EP0193886A2 EP 0193886 A2 EP0193886 A2 EP 0193886A2 EP 86102605 A EP86102605 A EP 86102605A EP 86102605 A EP86102605 A EP 86102605A EP 0193886 A2 EP0193886 A2 EP 0193886A2
Authority
EP
European Patent Office
Prior art keywords
layer
membrane
plate
membrane according
shaped
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.)
Withdrawn
Application number
EP86102605A
Other languages
German (de)
English (en)
Other versions
EP0193886A3 (fr
Inventor
Leonhard 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 Unterhaltungselektronik Deutschland GmbH
Standard Elektrik Lorenz AG
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 Unterhaltungselektronik Deutschland GmbH, Standard Elektrik Lorenz AG filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0193886A2 publication Critical patent/EP0193886A2/fr
Publication of EP0193886A3 publication Critical patent/EP0193886A3/fr
Withdrawn legal-status Critical Current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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • 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

Definitions

  • the invention relates to a membrane for a planar loudspeaker with an intermediate layer arranged between the planar radiation layer and the voice coil
  • Every loudspeaker diaphragm must meet two very important requirements: it must be light in order to be able to follow steep signal edges as quickly as possible, and it must be stiff so that it can follow the signal evenly over its entire surface without suffering its own deformation.
  • the loudspeaker shows poor reproduction behavior for impulses and high sound frequencies.
  • the electrical signals are not converted into genuine, piston-like movements of the membrane, but the membrane suffers deformations due to partial vibrations. Such deformations lead to sound pressure waves which do not correspond to the triggering electrical signal, that is to say reproduce it in a distorted manner.
  • partial vibrations mean considerable additional stress on the membrane material, which can lead to fatigue and even destruction of the membrane.
  • the known membrane for a planar loudspeaker consists of an essentially frustoconical molded part made of foamed polystyrene, on the flat end face of which two foils are arranged as a planar abstract layer.
  • the object underlying the invention is therefore to design the membrane for a planar loudspeaker in such a way that the manufacture of the membrane and thus also the manufacture of the loudspeaker is inexpensive
  • the intermediate layer consists of an essentially conical plastic film which is provided with support elements which extend as far as the plate-shaped radiation layer
  • the new planar loudspeaker contains a large number of parts, which also contains a loudspeaker with a cone membrane. These are firstly the permanent magnet system 1 to which the loudspeaker basket 2 is attached. In addition there are the voice coil support 3 with the voice coil 4, the centering 5 and the bead-shaped membrane suspension 6. The only two parts specific to a planar loudspeaker are the conical plastic film 7 provided with support elements 9 and the plate-shaped radiation layer 8.
  • the radiation layer 8 can consist for example of a circular plate made of foamed polystyrene. It can also be flocked with plastic fibers on the surface arranged in the direction of radiation. Damping of the membrane movement is achieved by such a measure.
  • the radiation layer 8 can also be formed in multiple layers. Such a multi-layer construction consists, for example, of two outer thin metal plates, for example thin aluminum sheet, which are firmly connected to an intermediate layer, for example a honeycomb structure.
  • Figures 3 and 4 show two embodiments for the provided with supporting elements 9 plastic film 7. It are each a plan view of the plastic film 7 in the direction of arrow 1 0 shown in Fig. 2.
  • supporting elements 9 plastic it could also are a conventional cone membrane made of plastic, on which the support elements 9 are placed, for example glued.
  • this configuration is likely to be too complex to manufacture. It should therefore be more expedient for a production method in which the support elements 9 are produced in one piece with the plastic film 7. This can be done, for example, by deep-drawing both simultaneously from a flat plastic film.
  • the support elements 9 have a frustoconical shape, the taper of which is directed towards the radiation layer
  • the support elements 9 have the shape of webs which are arranged on circles.
  • FIG. 5 Another embodiment of the radiation layer 8 can be seen from FIG. 5, which differs from the one previously shown in that the rear side is provided with the thickening 11. If this thickening 11 is dimensioned accordingly, the radiation layer 8 can be centered in a simple manner .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Materials For Medical Uses (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
EP86102605A 1985-03-05 1986-02-28 Membrane pour haut-parleur plan Withdrawn EP0193886A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3507726 1985-03-03
DE19853507726 DE3507726A1 (de) 1985-03-05 1985-03-05 Membran fuer planarlautsprecher

Publications (2)

Publication Number Publication Date
EP0193886A2 true EP0193886A2 (fr) 1986-09-10
EP0193886A3 EP0193886A3 (fr) 1988-01-27

Family

ID=6264233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102605A Withdrawn EP0193886A3 (fr) 1985-03-05 1986-02-28 Membrane pour haut-parleur plan

Country Status (5)

Country Link
US (1) US4764968A (fr)
EP (1) EP0193886A3 (fr)
DE (1) DE3507726A1 (fr)
DK (1) DK97486A (fr)
NO (1) NO860671L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270981A3 (fr) * 1986-12-06 1990-05-16 EWD Electronic-Werke Deutschland GmbH Haut-parleur
WO1991019405A1 (fr) * 1990-06-08 1991-12-12 Simon Paul Carrington Haut-parleur a diaphragme possedant un conduit d'air

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5848173A (en) * 1995-03-30 1998-12-08 Pioneer Electronic Corporation Surroundless loudspeaker
US5734734A (en) * 1995-12-29 1998-03-31 Proni; Lucio Audio voice coil adaptor ring
DE19747955C2 (de) * 1997-10-30 2002-11-07 Harman Audio Electronic Sys Lautsprecher
US6501844B2 (en) 2000-12-08 2002-12-31 Jl Audio, Inc. Loudspeaker and method of assembling same
US6496590B2 (en) 2000-12-08 2002-12-17 Jl Audio, Inc. Loudspeaker with improved diaphragm
US7333620B2 (en) * 2003-04-09 2008-02-19 Harman International Industries, Incorporated Acoustic transducer with mechanical balancing
JP4610890B2 (ja) * 2003-12-24 2011-01-12 パイオニア株式会社 スピーカ装置
JP2006157840A (ja) * 2004-10-25 2006-06-15 Pioneer Electronic Corp スピーカー装置
JP4726090B2 (ja) * 2006-08-24 2011-07-20 パイオニア株式会社 スピーカ装置
GB2479941A (en) * 2010-04-30 2011-11-02 Gp Acoustics Stiffened loudspeaker diaphragm
USD856981S1 (en) * 2016-09-23 2019-08-20 Tymphany Hk Limited Waveguide for a loudspeaker
US10244322B2 (en) * 2016-10-11 2019-03-26 YG Acoustics LLC Space frame reinforced tweeter dome
GB2599605B (en) * 2019-08-23 2022-09-28 Tymphany Acoustic Tech Ltd Method of manufacturing a diaphragm for an audio transducer

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB160223A (en) * 1919-11-18 1921-03-18 Adrian Francis Sykes Improvements in telephonic and like apparatus
NL24326C (fr) * 1927-11-07
DE709710C (de) * 1935-02-16 1941-08-25 Zeiss Ikon Akt Ges Membran fuer akustische Geraete
US2845135A (en) * 1955-09-26 1958-07-29 Arthur Blumenfeld Auxiliary wave propagating and directing attachment for loudspeaker diaphragms
US3153463A (en) * 1961-08-30 1964-10-20 Muter Company Compound loudspeaker diaphragm
FR1348004A (fr) * 1962-01-15 1964-01-04 Akg Akustische Kino Geraete Diaphragme pour dispositifs acoustiques
US3213209A (en) * 1962-08-07 1965-10-19 Eduart R Doelitzsch Loudspeaker
JPS5343515A (en) * 1976-09-30 1978-04-19 Matsushita Electric Ind Co Ltd Diaphragm for speaker
JPS5379525A (en) * 1976-12-23 1978-07-14 Sony Corp Compound diaphtagm for speakers
JPS5748153Y2 (fr) * 1977-11-26 1982-10-22
JPS603277B2 (ja) * 1978-06-15 1985-01-26 ソニー株式会社 スピーカ装置
JPS5527702A (en) * 1978-08-18 1980-02-28 Sony Corp Vibrator for speaker
GB2079564B (en) * 1978-08-18 1983-01-19 Sony Corp Loudspeaker diaphragms
GB2059717B (en) * 1979-09-25 1984-04-04 Victor Company Of Japan Speaker diaphragm assembly and a method of manufacturing the same
GB2062408B (en) * 1979-10-02 1984-02-22 Victor Company Of Japan Speaker
US4472604A (en) * 1980-03-08 1984-09-18 Nippon Gakki Seizo Kabushiki Kaisha Planar type electro-acoustic transducer and process for manufacturing same
NL8200416A (nl) * 1982-02-04 1983-09-01 Philips Nv Vlakmembraan omzetter en werkwijze voor het vervaardigen van een dergelijke omzetter.
NL8301653A (nl) * 1983-05-10 1984-12-03 Philips Nv Elektro-akoestische omzetter met een luchtdoorlatend membraan.
GB2169471A (en) * 1985-01-04 1986-07-09 Anthony Bernard Clarke Acoustic diaphragm

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270981A3 (fr) * 1986-12-06 1990-05-16 EWD Electronic-Werke Deutschland GmbH Haut-parleur
WO1991019405A1 (fr) * 1990-06-08 1991-12-12 Simon Paul Carrington Haut-parleur a diaphragme possedant un conduit d'air
GB2261136A (en) * 1990-06-08 1993-05-05 Simon Paul Carrington Loudspeaker with a diaphragm having an air conduit
GB2261136B (en) * 1990-06-08 1995-02-15 Simon Paul Carrington Loudspeaker with an oscillator having a coiled tubular chamber
US5721786A (en) * 1990-06-08 1998-02-24 Carrington; Simon Paul Loudspeakers

Also Published As

Publication number Publication date
DK97486D0 (da) 1986-03-04
NO860671L (no) 1986-09-08
DE3507726C2 (fr) 1992-05-14
EP0193886A3 (fr) 1988-01-27
US4764968A (en) 1988-08-16
DE3507726A1 (de) 1986-09-11
DK97486A (da) 1986-09-06

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Inventor name: KREITMEIER, LEONHARD