JPS57183199A - Manufacture of magnetic circuit for speaker - Google Patents

Manufacture of magnetic circuit for speaker

Info

Publication number
JPS57183199A
JPS57183199A JP6860781A JP6860781A JPS57183199A JP S57183199 A JPS57183199 A JP S57183199A JP 6860781 A JP6860781 A JP 6860781A JP 6860781 A JP6860781 A JP 6860781A JP S57183199 A JPS57183199 A JP S57183199A
Authority
JP
Japan
Prior art keywords
upper plate
center pole
magnet
projection
positioning
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
JP6860781A
Other languages
Japanese (ja)
Inventor
Ichiro Tomioka
Mikio Asami
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6860781A priority Critical patent/JPS57183199A/en
Publication of JPS57183199A publication Critical patent/JPS57183199A/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
    • H04R9/02—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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • 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
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers

Landscapes

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

Abstract

PURPOSE:To stabilize characteristics and to improve mass-producibility by positioning the internal diameter of an upper plate and the top part of a center pole, and then perform resin molding by using forces wherein bodies obtained by bonding and combining magnets to plates are incorporated. CONSTITUTION:The internal diameter of an upper plate 4 is positioned at a bottom force 7 and a projection 8 is positioned by fitting the top part of a center pole 1 in the upper plate 4, thus incorporating the upper plate 4. Then, a body obtained by positioning and coupling a magnet 3 and a plate 2 together with an adhesive is incorporated with the center pole 1 fitted in the projection 8 and in this state, a top force 9 is combined with the bottom force 7. Melted resin is injected around the lamination of constituent parts to form a resin mold 5. Consequently, pressure generated during the injection of the melted resin stops the magnet 3 from shifting in position and the magnetic flux density distribution of the magnetic gap 6 is made uniform, thereby obtaining a magnetic circuit of high quality having stable characteristics.
JP6860781A 1981-05-06 1981-05-06 Manufacture of magnetic circuit for speaker Pending JPS57183199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6860781A JPS57183199A (en) 1981-05-06 1981-05-06 Manufacture of magnetic circuit for speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6860781A JPS57183199A (en) 1981-05-06 1981-05-06 Manufacture of magnetic circuit for speaker

Publications (1)

Publication Number Publication Date
JPS57183199A true JPS57183199A (en) 1982-11-11

Family

ID=13378624

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6860781A Pending JPS57183199A (en) 1981-05-06 1981-05-06 Manufacture of magnetic circuit for speaker

Country Status (1)

Country Link
JP (1) JPS57183199A (en)

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