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EP0242856A3 - Coaxial loud speaker - Google Patents

Coaxial loud speaker Download PDF

Info

Publication number
EP0242856A3
EP0242856A3 EP87105855A EP87105855A EP0242856A3 EP 0242856 A3 EP0242856 A3 EP 0242856A3 EP 87105855 A EP87105855 A EP 87105855A EP 87105855 A EP87105855 A EP 87105855A EP 0242856 A3 EP0242856 A3 EP 0242856A3
Authority
EP
European Patent Office
Prior art keywords
diaphragms
magnetic
coaxial
pole plate
radiated
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
EP87105855A
Other languages
German (de)
Other versions
EP0242856B1 (en
EP0242856A2 (en
Inventor
Thomas Deuble
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87105855T priority Critical patent/ATE71789T1/en
Publication of EP0242856A2 publication Critical patent/EP0242856A2/en
Publication of EP0242856A3 publication Critical patent/EP0242856A3/en
Application granted granted Critical
Publication of EP0242856B1 publication Critical patent/EP0242856B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The coaxial loudspeaker (1) has a low-frequency diaphragm (2), a high-frequency diaphragm (3) and in each case one magnetic circuit (11 and 12, respectively) for the voice coils (9 and 10, respectively) connected to the diaphragms. The magnets (13, 14) of the two magnetic circuits (11, 12) are arranged with like poles (N) located opposite one another and exhibit a common pole plate (15). The elastic points of attachment of the voice coils (9, 10) at the two diaphragms (2, 3) are located in one plane. The result of this design is that sound components radiated by both diaphragms (2, 3) are radiated in the same phase with the same frequencies. In addition, the common pole plate (15) increases the magnetic flux density in the air gaps of the two magnetic circuits (11, 12) and reduces the stray flux. <IMAGE>
EP87105855A 1986-04-21 1987-04-21 Coaxial loud speaker Expired - Lifetime EP0242856B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105855T ATE71789T1 (en) 1986-04-21 1987-04-21 COAXIAL SPEAKERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8610875U DE8610875U1 (en) 1986-04-21 1986-04-21 Loudspeakers and magnet systems therefor
DE8610875U 1986-04-21

Publications (3)

Publication Number Publication Date
EP0242856A2 EP0242856A2 (en) 1987-10-28
EP0242856A3 true EP0242856A3 (en) 1989-03-15
EP0242856B1 EP0242856B1 (en) 1992-01-15

Family

ID=6793892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105855A Expired - Lifetime EP0242856B1 (en) 1986-04-21 1987-04-21 Coaxial loud speaker

Country Status (3)

Country Link
EP (1) EP0242856B1 (en)
AT (1) ATE71789T1 (en)
DE (2) DE8610875U1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8610875U1 (en) * 1986-04-21 1986-06-05 Deuble, Thomas, 8998 Lindenberg Loudspeakers and magnet systems therefor
DE4021651C1 (en) * 1990-07-07 1991-06-27 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
JP3167153B2 (en) * 1991-09-30 2001-05-21 パイオニア株式会社 Speaker spacer
IT1258008B (en) * 1992-01-14 1996-02-20 COMPOUND ELECTROACOUSTIC TRANSDUCER FOR THE REPRODUCTION OF MEDIUM-HIGH FREQUENCIES
GB2364847B (en) * 2000-07-11 2004-10-13 Kef Audio Compound loudspeaker having a magnet system
DE102006024054B3 (en) * 2006-05-23 2007-09-20 Klaus Reck Coaxial loudspeaker, has speaker case with closed cylinder for generating high-pitched speaker volume and made of single piece-light alloy-die cast, and high-pitched speaker stuck into cylindrical volume in air-tight manner
ATE463132T1 (en) 2007-08-14 2010-04-15 Klaus Reck COAXIAL SPEAKER
DE102010015445B4 (en) 2010-04-17 2012-10-25 Arne Färber Coaxial
GB2502189B (en) * 2013-03-25 2014-06-04 Tannoy Ltd Loudspeaker
GB2543322A (en) * 2015-10-14 2017-04-19 Music Group Ip Ltd Loudspeaker

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB311486A (en) * 1928-02-27 1929-05-16 British Thomson Houston Co Ltd Improvements relating to electro-magnetic acoustic devices for the interconversion of mechanical and electric oscillations, such as loud-speakers
US2923783A (en) * 1957-06-17 1960-02-02 Stanley F White Electro-acoustical transducer
DE2819548A1 (en) * 1977-05-06 1978-11-09 Tannoy Products Ltd SPEAKER
DE3007115A1 (en) * 1980-01-19 1981-09-10 Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim Loudspeaker using single magnet for three diaphragms - has circular pole shoes providing air gaps for concentrically moving coils
DE3147169A1 (en) * 1980-11-28 1982-07-08 Hitachi, Ltd., Tokyo DYNAMIC SPEAKER
FR2554663A1 (en) * 1983-11-03 1985-05-10 Magnetfabrik Bonn Gmbh Gewerks LOW DISPERSION MAGNETIC PACK SYSTEM FOR DYNAMIC LOUDSPEAKERS OR ACOUSTIC CONVERTERS
DE8610875U1 (en) * 1986-04-21 1986-06-05 Deuble, Thomas, 8998 Lindenberg Loudspeakers and magnet systems therefor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60177798A (en) * 1984-02-23 1985-09-11 Matsushita Electric Ind Co Ltd Coaxial flat speaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB311486A (en) * 1928-02-27 1929-05-16 British Thomson Houston Co Ltd Improvements relating to electro-magnetic acoustic devices for the interconversion of mechanical and electric oscillations, such as loud-speakers
US2923783A (en) * 1957-06-17 1960-02-02 Stanley F White Electro-acoustical transducer
DE2819548A1 (en) * 1977-05-06 1978-11-09 Tannoy Products Ltd SPEAKER
DE3007115A1 (en) * 1980-01-19 1981-09-10 Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim Loudspeaker using single magnet for three diaphragms - has circular pole shoes providing air gaps for concentrically moving coils
DE3147169A1 (en) * 1980-11-28 1982-07-08 Hitachi, Ltd., Tokyo DYNAMIC SPEAKER
FR2554663A1 (en) * 1983-11-03 1985-05-10 Magnetfabrik Bonn Gmbh Gewerks LOW DISPERSION MAGNETIC PACK SYSTEM FOR DYNAMIC LOUDSPEAKERS OR ACOUSTIC CONVERTERS
DE8610875U1 (en) * 1986-04-21 1986-06-05 Deuble, Thomas, 8998 Lindenberg Loudspeakers and magnet systems therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 16 (E-375)[2073], 22. Januar 1986; & JP-A-60 177 798 (MATSUSHITA DENKI SANGYO K.K.) 11-09-1985 *

Also Published As

Publication number Publication date
EP0242856B1 (en) 1992-01-15
DE3775970D1 (en) 1992-02-27
DE8610875U1 (en) 1986-06-05
EP0242856A2 (en) 1987-10-28
ATE71789T1 (en) 1992-02-15

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