JPS57143998A - Thin speaker - Google Patents

Thin speaker

Info

Publication number
JPS57143998A
JPS57143998A JP3010181A JP3010181A JPS57143998A JP S57143998 A JPS57143998 A JP S57143998A JP 3010181 A JP3010181 A JP 3010181A JP 3010181 A JP3010181 A JP 3010181A JP S57143998 A JPS57143998 A JP S57143998A
Authority
JP
Japan
Prior art keywords
yokes
diaphragm
speaker
thickness
space
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
JP3010181A
Other languages
Japanese (ja)
Inventor
Tatsuo Nitta
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch Co 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP3010181A priority Critical patent/JPS57143998A/en
Publication of JPS57143998A publication Critical patent/JPS57143998A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • 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

Landscapes

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

Abstract

PURPOSE:To reduce the thickness of a speaker by arranging a disphragm in a space between yokes arranged on the top and reverse surfaces of a columnar permanent magnet. CONSTITUTION:Yokes 22a-22c made of materials having high magnetic permeability are arranged on the top and reverse surfaces of a columnar permanent magnet 21 arranged nearly in the center, and the magnet 21, and yokes 22a-22c constitute a magnetic circuit 23. Further, a diaphragm is arranged in a space between the yokes 22a and 22b, and a yoke 22c, and a voice coil 25 is stuck to the diaphragm 24 and fitted in a magnetic gap 23a formed in the magnetic circuit 23. Thus, this speaker is reduced in thickness by the height of the diaphragm.
JP3010181A 1981-03-03 1981-03-03 Thin speaker Pending JPS57143998A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3010181A JPS57143998A (en) 1981-03-03 1981-03-03 Thin speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3010181A JPS57143998A (en) 1981-03-03 1981-03-03 Thin speaker

Publications (1)

Publication Number Publication Date
JPS57143998A true JPS57143998A (en) 1982-09-06

Family

ID=12294381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3010181A Pending JPS57143998A (en) 1981-03-03 1981-03-03 Thin speaker

Country Status (1)

Country Link
JP (1) JPS57143998A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4987324A (en) * 1972-12-22 1974-08-21
JPS5358222A (en) * 1976-11-08 1978-05-26 Pioneer Electronic Corp Headphone
JPS55105496A (en) * 1979-02-07 1980-08-13 Matsushita Electric Ind Co Ltd Thin-gage speaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4987324A (en) * 1972-12-22 1974-08-21
JPS5358222A (en) * 1976-11-08 1978-05-26 Pioneer Electronic Corp Headphone
JPS55105496A (en) * 1979-02-07 1980-08-13 Matsushita Electric Ind Co Ltd Thin-gage speaker

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