EP0262406A2 - Elektro-akustischer Wandler mit Diaphragma und Folie dafür - Google Patents

Elektro-akustischer Wandler mit Diaphragma und Folie dafür Download PDF

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Publication number
EP0262406A2
EP0262406A2 EP87112525A EP87112525A EP0262406A2 EP 0262406 A2 EP0262406 A2 EP 0262406A2 EP 87112525 A EP87112525 A EP 87112525A EP 87112525 A EP87112525 A EP 87112525A EP 0262406 A2 EP0262406 A2 EP 0262406A2
Authority
EP
European Patent Office
Prior art keywords
diaphragm
projections
electro
sheet
acoustic transducer
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Withdrawn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
EP87112525A
Other languages
English (en)
French (fr)
Other versions
EP0262406A3 (de
Inventor
David A. Larson
Daniel A. Shumaker.
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
Priority claimed from US06/389,423 external-priority patent/US4491698A/en
Application filed by Individual filed Critical Individual
Priority to EP87112525A priority Critical patent/EP0262406A3/de
Publication of EP0262406A2 publication Critical patent/EP0262406A2/de
Publication of EP0262406A3 publication Critical patent/EP0262406A3/de
Withdrawn legal-status Critical Current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; 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
    • 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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • 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

Definitions

  • Such a transducer may be a loudspeaker or a microphone.
  • Each one includes a movable diaphragm, which interacts with the surrounding atmosphere to either produce sound waves, or to be set into motion by sound waves.
  • the present invention relates to both types of electro-acoustic transducers. However, for the sake of clarity, only loudspeakers will be shown and described herein.
  • the speaker diaphragm shown in United States Patent 3,171,904 In order to obtain good high frequency response, it would be necessary for the speaker diaphragm shown in United States Patent 3,171,904, to have a much greater number of conductors for a given area to provide adequate electromagnetic energy, and to attain the desired impedance.
  • the current industry standard is a resistance of between four and eight ohms, to accomodate standard amplifiers.
  • the elongate peaks and troughs are not secured together, or otherwise supported, except at the side edges of the folded film, thereby resulting in a flimsy structure.
  • the troughs and the conductors thereon are not securely positioned in alignment with the magnetic structure.
  • sideward movement of the troughs is possible, and hence, the desired precise magnetic interaction between the current carrying conductors on the diaphragm troughs and the magnet rods, can not be achieved, for some applications.
  • the sheet 32 is affixed to the interconnecting portions, which provide substantial surface areas of attachment so as to securely attach the sheet 32 to the sheet 34A and its projections P. In this manner, the sheet 32 remains substantially flat during use, to provide the desired frequency response character­istics.
  • the diaphragm 12 oscillates and thus the vanes 35 move longitudinally within the pole pice gaps 47, as a result of the dynamic electromagnetic interaction between the current carrying conductor portions on the vanes and the permanent magnet pole pieces.
  • the same oscillating movement of the vanes 35, and attached backing sheet 32 also causes air to be displaced from the gaps 47 for cooling purposes, thereby relieving heat build-up.
  • Such a greater flow rate of air is desirable, since heat build-up increases as the diaphragm is driven harder, especially where it is driven beyond desired limits and since in some applications (such as automotive) ambient temperatures are high.
  • a longitudinally extending portion 109 is disposed parallel to the portion 83 and connects the portion 107 and a transversely extending portion 112.
  • the portion 109 extends parallel to the portion 83 and the portion 112 extends parallel to the portion 85.
  • the diaphragm 186 is generally similar to the diaphragm 12 of Fig. 1, and includes a series of spaced-apart, longitudinally extending projections in the form of vanes of fins, such as vanes 187 and 189, which are channel-shaped throughout their length and U-shaped in cross-section.
  • a series of three outer voice coil conductors 192, 194 and 196 are deposited on the outer surface of the vane 187 in a similar manner as the outer voice coil conductors are connected to the diaphragm 12.
  • a series of inner voice coil conductors 198, 201 and 203 are deposited on the inner surface of the vane 187 opposite the corresponding respective outer conductors.
  • acoustic transducer 213 which is also constructed in accordance with the present invention, and which has a diaphragm 213A.
  • the diaphragm 213A is generally similar to the diaphragm 186, of Fig. 6, except the manner in which the diaphragm 213A is rigidified.
  • a foam backing sheet 258 is disposed in place in a manner similar to the foam backing sheet 190.
  • a series of elongated depending ridges, such as the ridges 261 and 263, are disposed in the upper portions of the interior of the vanes, such as the corresponding vanes 243 and 244.
  • the ridges 261 and 263 serve the same purpose as the channels 240 of the diaphragm 225A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP87112525A 1982-06-17 1983-06-16 Elektro-akustischer Wandler mit Diaphragma und Folie dafür Withdrawn EP0262406A3 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP87112525A EP0262406A3 (de) 1982-06-17 1983-06-16 Elektro-akustischer Wandler mit Diaphragma und Folie dafür

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US389423 1982-06-17
US06/389,423 US4491698A (en) 1982-06-17 1982-06-17 Electro-acoustic transducer with diaphragm and blank therefor
EP87112525A EP0262406A3 (de) 1982-06-17 1983-06-16 Elektro-akustischer Wandler mit Diaphragma und Folie dafür

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP83902368.6 Division 1983-06-16
EP83902368A Division EP0112383B1 (de) 1982-06-17 1983-06-16 Elektro-akustischer umwandler mit diaphragma

Publications (2)

Publication Number Publication Date
EP0262406A2 true EP0262406A2 (de) 1988-04-06
EP0262406A3 EP0262406A3 (de) 1988-08-31

Family

ID=26108415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112525A Withdrawn EP0262406A3 (de) 1982-06-17 1983-06-16 Elektro-akustischer Wandler mit Diaphragma und Folie dafür

Country Status (1)

Country Link
EP (1) EP0262406A3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001022773A1 (en) * 1999-09-20 2001-03-29 Boston Acoustics, Inc. Planar-type loudspeaker with at least two diaphragms
EP2302949A1 (de) * 2008-07-10 2011-03-30 Pioneer Corporation Lautsprechereinrichtung
WO2024066198A1 (zh) * 2022-09-28 2024-04-04 深圳线升科技有限公司 振膜阵列

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE483871A (de) *
US1958423A (en) * 1932-12-15 1934-05-15 Duffy Charles Hugh Radio loud speaker
US3674946A (en) * 1970-12-23 1972-07-04 Magnepan Inc Electromagnetic transducer
FR2427753A1 (fr) * 1978-06-01 1979-12-28 Sawafuji Tadashi Transducteurs acoustiques
GB2029162A (en) * 1978-08-18 1980-03-12 Sumitomo Bakelite Co Electroacoustic transducers
JPS5730499A (en) * 1980-07-30 1982-02-18 Onkyo Corp Diaphragm for plane drive type speaker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477821A1 (fr) * 1980-03-06 1981-09-11 3A Art Acoustique Appliquee Sa Haut-parleur electrodynamique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE483871A (de) *
US1958423A (en) * 1932-12-15 1934-05-15 Duffy Charles Hugh Radio loud speaker
US3674946A (en) * 1970-12-23 1972-07-04 Magnepan Inc Electromagnetic transducer
FR2427753A1 (fr) * 1978-06-01 1979-12-28 Sawafuji Tadashi Transducteurs acoustiques
GB2029162A (en) * 1978-08-18 1980-03-12 Sumitomo Bakelite Co Electroacoustic transducers
JPS5730499A (en) * 1980-07-30 1982-02-18 Onkyo Corp Diaphragm for plane drive type speaker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 99 (E-111)[977], 8th June 1982; & JP-A-57 30 499 (ONKYO K.K.) 18-02-1982 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001022773A1 (en) * 1999-09-20 2001-03-29 Boston Acoustics, Inc. Planar-type loudspeaker with at least two diaphragms
US6449376B1 (en) 1999-09-20 2002-09-10 Boston Acoustics, Inc. Planar-type loudspeaker with at least two diaphragms
EP2302949A1 (de) * 2008-07-10 2011-03-30 Pioneer Corporation Lautsprechereinrichtung
CN102057690A (zh) * 2008-07-10 2011-05-11 日本先锋公司 扬声器装置
EP2302949A4 (de) * 2008-07-10 2012-10-31 Pioneer Corp Lautsprechereinrichtung
WO2024066198A1 (zh) * 2022-09-28 2024-04-04 深圳线升科技有限公司 振膜阵列
GB2625657A (en) * 2022-09-28 2024-06-26 Shenzhen Linearup Tech Ltd Diaphragm array

Also Published As

Publication number Publication date
EP0262406A3 (de) 1988-08-31

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Inventor name: SHUMAKER. DANIEL A.

Inventor name: LARSON, DAVID A.