JPS5632900A - Flat-plate speaker - Google Patents

Flat-plate speaker

Info

Publication number
JPS5632900A
JPS5632900A JP10808679A JP10808679A JPS5632900A JP S5632900 A JPS5632900 A JP S5632900A JP 10808679 A JP10808679 A JP 10808679A JP 10808679 A JP10808679 A JP 10808679A JP S5632900 A JPS5632900 A JP S5632900A
Authority
JP
Japan
Prior art keywords
diaphragm
cone
circumference
nodal
fixed
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.)
Pending
Application number
JP10808679A
Other languages
Japanese (ja)
Inventor
Manabu Wakabayashi
Shizuo Yagi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10808679A priority Critical patent/JPS5632900A/en
Publication of JPS5632900A publication Critical patent/JPS5632900A/en
Pending 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To widen the band on the whole by equalizing force applied to a cone and that applied to each nodal circle of a diaphragm by equalizing the semivertical angle of each driving cone so that nearly equal force will be applied to nodal circles of a circular plane diaphragm. CONSTITUTION:Circular plane diaphragm 1, supported by edge 2 at its circumference, of D1 in diameter and even thickness, and cone 11 large and cone 12 small in semivertical angle fixed at their circumferences to nodal circles generated when this diaphragm 1 is excited while its circumference is made free are provided. Further, voice coil 4 is fixed to one terminal, and bobbin 3 with internal circumferential parts of cones 11 and 12 fixed to the other terminal and spider 13 support the circumference of bobbin 3 are provided to constitute the vibration system. Further, magnetic gap 17 covering coil 4 is provided and the magnetic circuit is composed of pole plate 5, magnet 6 and external yoke plate 7. Then, force transmitted to cones 11 and 12 and force applied to each nodal circle of diaphragm 1 are nearly equalized, thereby widening the band on the whole.
JP10808679A 1979-08-27 1979-08-27 Flat-plate speaker Pending JPS5632900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10808679A JPS5632900A (en) 1979-08-27 1979-08-27 Flat-plate speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10808679A JPS5632900A (en) 1979-08-27 1979-08-27 Flat-plate speaker

Publications (1)

Publication Number Publication Date
JPS5632900A true JPS5632900A (en) 1981-04-02

Family

ID=14475510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10808679A Pending JPS5632900A (en) 1979-08-27 1979-08-27 Flat-plate speaker

Country Status (1)

Country Link
JP (1) JPS5632900A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520962A1 (en) * 1982-02-04 1983-08-05 Philips Nv FLAT MEMBRANE TRANSDUCER AND METHOD FOR PRODUCING THE TRANSDUCER
JPS5928796A (en) * 1982-08-11 1984-02-15 Kuraisuraa Denki Kk Speaker
JP2007251516A (en) * 2006-03-15 2007-09-27 Minebea Co Ltd Speaker
US7916878B2 (en) 2004-04-16 2011-03-29 New Transducers Limited Acoustic device and method of making acoustic device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520962A1 (en) * 1982-02-04 1983-08-05 Philips Nv FLAT MEMBRANE TRANSDUCER AND METHOD FOR PRODUCING THE TRANSDUCER
JPS5928796A (en) * 1982-08-11 1984-02-15 Kuraisuraa Denki Kk Speaker
US7916878B2 (en) 2004-04-16 2011-03-29 New Transducers Limited Acoustic device and method of making acoustic device
JP2007251516A (en) * 2006-03-15 2007-09-27 Minebea Co Ltd Speaker

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