EP0055841A1 - Haut-parleur électrodynamique à membrane en forme de dôme - Google Patents

Haut-parleur électrodynamique à membrane en forme de dôme Download PDF

Info

Publication number
EP0055841A1
EP0055841A1 EP81110626A EP81110626A EP0055841A1 EP 0055841 A1 EP0055841 A1 EP 0055841A1 EP 81110626 A EP81110626 A EP 81110626A EP 81110626 A EP81110626 A EP 81110626A EP 0055841 A1 EP0055841 A1 EP 0055841A1
Authority
EP
European Patent Office
Prior art keywords
voice coil
dome
diameter
loudspeaker
membrane
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Withdrawn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
EP81110626A
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Dipl.-Phys. Thiele
Otto Ehmann
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.)
Elektrotechnik Ehmann GmbH
Licentia Patent Verwaltungs GmbH
Original Assignee
Elektrotechnik Ehmann GmbH
Licentia Patent Verwaltungs 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 Elektrotechnik Ehmann GmbH, Licentia Patent Verwaltungs GmbH filed Critical Elektrotechnik Ehmann GmbH
Publication of EP0055841A1 publication Critical patent/EP0055841A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • 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
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H04R9/027—Air gaps using a magnetic fluid
    • 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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering

Definitions

  • the invention relates to a loudspeaker system with a dome-shaped membrane.
  • a voice coil former is usually attached to the outer edge of the dome.
  • a voice coil is wound onto the voice coil support and projects into a concentric air gap in a magnet system of the loudspeaker system.
  • the air gap is between a pole core of a magnetic body and a part surrounding the pole core, e.g. a pole plate. Accordingly, the pole core generally has a diameter which corresponds approximately to the diameter of the calotte. The volume of the magnetic body is thus large relative to the membrane dimensions.
  • the invention has for its object to provide an electrodynamic dome speaker system in which the magnetic body can be made smaller.
  • the voice coil former is longer in its axial direction than the voice coil former of conventional dome loudspeakers.
  • the voice coil former of conventional dome loudspeakers.
  • Fig. 1 shows a calotte membrane.
  • a vibrating bead is stamped on the outer edge, which merges into a fastening ring, on which the membrane is clamped in a loudspeaker system.
  • a concentric centering shoulder 2 is stamped into the calotte between the edge and the center of the calotte, in which a voice coil former 3 is fastened, for example glued.
  • the calotte divided into a dome-shaped central part 4, a cylindrical part that forms the centering shoulder, and a spherical ring-shaped outer part 5.
  • the properties of the spherical cap membrane e.g. the dimensional stability, favorably influenced. Since this measure reduces the diameter of the voice coil, a magnet system with significantly smaller dimensions can be used, as a result of which the costs for the production of the loudspeaker system are considerably reduced.
  • the outer diameter of the dome is designated 6 and the diameter of a pole core suitable for the voice coil shown is 7.
  • a calender diameter 6 of 37 mm and a pole core diameter 7 of 25 mm were selected.
  • Fig. 2 shows a further embodiment.
  • the calotte diameter is, for example, 50 mm and the pole core diameter is 30 mm.
  • the voice coil former 8 is inserted into an annular, concentric groove in the spherical cap diaphragm 9 and fastened there.
  • the magnet system has a pole core 10 and a pole plate 11.
  • a spacer ring 12 is placed on the pole plate 11, on which the dome membrane 9 is fastened with its edge. The spacer ring 12 ensures that the membrane 9 can perform a sufficient stroke.
  • the air gap of the magnet system 10, 411 is filled with magnetic liquid 13 on both sides of the voice coil bobbin in the exemplary embodiment in FIG. 2.
  • the membranes 4 and 9 in FIGS. 1 and 2 are advantageously stamped from plastic film.
  • a multilayer composite film (so-called sandwich technique) is advantageously used.
  • the dome loudspeaker described with reference to FIGS. 1 and 2 already has such a steep drop at the upper cut-off frequency that it is sufficient to determine the upper cut-off frequency of the emitted signals without additional circuit measures.
  • This property is illustrated in FIG. 7. It suffices accordingly, the system is only to be coupled to the signal source by means of a high-pass filter 15, 16 according to Fig. 8. The components 17 and 18 from Fig. 6 are thus saved.

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)
EP81110626A 1980-12-27 1981-12-19 Haut-parleur électrodynamique à membrane en forme de dôme Withdrawn EP0055841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3049222 1980-12-27
DE19803049222 DE3049222A1 (de) 1980-12-27 1980-12-27 Elektrodynamisches lautsprechersystem mit kalottenfoermiger membran

Publications (1)

Publication Number Publication Date
EP0055841A1 true EP0055841A1 (fr) 1982-07-14

Family

ID=6120411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110626A Withdrawn EP0055841A1 (fr) 1980-12-27 1981-12-19 Haut-parleur électrodynamique à membrane en forme de dôme

Country Status (3)

Country Link
EP (1) EP0055841A1 (fr)
JP (1) JPS57131199A (fr)
DE (1) DE3049222A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515468A1 (fr) * 1981-10-26 1983-04-29 Sony Corp Ecouteur dynamique
WO1994003024A1 (fr) * 1992-07-17 1994-02-03 Harman-Motive Limited Haut-parleur
US5742696A (en) * 1994-04-09 1998-04-21 Harman International Industries Limited Modular tweeter
WO2004068898A1 (fr) * 2003-01-25 2004-08-12 Ist Gmbh Haut-parleur
DE102013012907B3 (de) * 2013-08-05 2014-05-22 Beyerdynamic Gmbh & Co. Kg Lautsprecher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6142194U (ja) * 1984-08-23 1986-03-18 オンキヨー株式会社 ド−ム型スピ−カ−

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB525154A (en) * 1938-02-16 1940-08-22 British Thomson Houston Co Ltd Improvements in and relating to dynamic sound-converting apparatus
DE1271197B (de) * 1966-05-11 1968-06-27 Siemens Ag Verfahren und Anordnung zur Befestlgung einer Membran an eine Schwingspule eines dynamischen Wandlers
DE2241445A1 (de) * 1972-08-23 1974-03-21 Gottlob Widmann & Soehne Gmbh Kalottenmembran fuer lautsprecher
DE2900427B1 (de) * 1979-01-08 1979-08-02 Licentia Gmbh Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Fluessigkeit gefuellten Luftspalt
WO1980001230A1 (fr) * 1978-11-30 1980-06-12 Licentia Gmbh Membrane pour transducteur electroacoustique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB525154A (en) * 1938-02-16 1940-08-22 British Thomson Houston Co Ltd Improvements in and relating to dynamic sound-converting apparatus
DE1271197B (de) * 1966-05-11 1968-06-27 Siemens Ag Verfahren und Anordnung zur Befestlgung einer Membran an eine Schwingspule eines dynamischen Wandlers
DE2241445A1 (de) * 1972-08-23 1974-03-21 Gottlob Widmann & Soehne Gmbh Kalottenmembran fuer lautsprecher
WO1980001230A1 (fr) * 1978-11-30 1980-06-12 Licentia Gmbh Membrane pour transducteur electroacoustique
DE2900427B1 (de) * 1979-01-08 1979-08-02 Licentia Gmbh Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Fluessigkeit gefuellten Luftspalt

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515468A1 (fr) * 1981-10-26 1983-04-29 Sony Corp Ecouteur dynamique
WO1994003024A1 (fr) * 1992-07-17 1994-02-03 Harman-Motive Limited Haut-parleur
GB2282024A (en) * 1992-07-17 1995-03-22 Harman Motive Ltd Loudspeaker
GB2282024B (en) * 1992-07-17 1995-12-20 Harman Motive Ltd Loudspeaker
US5742696A (en) * 1994-04-09 1998-04-21 Harman International Industries Limited Modular tweeter
WO2004068898A1 (fr) * 2003-01-25 2004-08-12 Ist Gmbh Haut-parleur
DE102013012907B3 (de) * 2013-08-05 2014-05-22 Beyerdynamic Gmbh & Co. Kg Lautsprecher

Also Published As

Publication number Publication date
JPS57131199A (en) 1982-08-13
DE3049222A1 (de) 1982-07-29

Similar Documents

Publication Publication Date Title
DE3302592C2 (fr)
DE68918332T2 (de) Elektroakustischer Wandler und Lautsprecher.
DE3730305C1 (de) Lautsprecher
DE69716010T2 (de) Elektrodynamischer lautsprecher und system mit diesem lautsprecher
DE2165572C3 (de) Lautsprechermembran
EP0062600A1 (fr) Haut-parleur électrodynamique pour fréquences sonores basses et moyennes
DE2900427B1 (de) Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Fluessigkeit gefuellten Luftspalt
DE2426474A1 (de) Lautsprecher mit einer schwingspule und einem piezoelektrischen rueckkopplungswandler
DE4231253A1 (de) Membran fuer elektrodynamische wandler
EP0055841A1 (fr) Haut-parleur électrodynamique à membrane en forme de dôme
DE2949115B2 (de) Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Flüssigkeit gefüllten Luftspalt zum Einfüllen und/oder gleichmäßigen Verteilen dieser Flüssigkeit
DE2459688A1 (de) Tonabnehmer
DE10322692A1 (de) Elektroakustischer Wandler
DE3241898A1 (de) Elektrodynamischer wandler
DE2716063A1 (de) Dynamischer wandler mit einer schwingspule in einem mit einer magnetischen fluessigkeit gefuellten luftspalt
DE20116576U1 (de) Bilderrahmenartiger Lautsprecher
DE4493008B4 (de) Lautsprecher
EP0360061A2 (fr) Membrane pour haut-parleur
EP0313560B1 (fr) Systeme de membrane avec plaque rigide en flexion et symetrique en rotation, servant d'element de reflexion ou de reception du son
DE3135003A1 (de) Dynamisches hochtonsystem
DE2752433B1 (de) Induktionsspule zur Gewinnung einer Gegenkopplungsspannung bei Lautsprechern
DE68907460T2 (de) Elektrodynamisch-fluidische Wandlerausrüstung für einen pneumatischen Lautsprecher.
WO1990003709A1 (fr) Systeme de membrane
DE4225854A1 (de) Mittel-/Tiefton-Lautsprecher
DE2228827C2 (de) Trompetenlautsprecher

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19821230

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19831216

RIN1 Information on inventor provided before grant (corrected)

Inventor name: THIELE, KARL-HEINZ, DIPL.-PHYS.

Inventor name: EHMANN, OTTO