JPS5746600A - Speaker unit - Google Patents

Speaker unit

Info

Publication number
JPS5746600A
JPS5746600A JP12321080A JP12321080A JPS5746600A JP S5746600 A JPS5746600 A JP S5746600A JP 12321080 A JP12321080 A JP 12321080A JP 12321080 A JP12321080 A JP 12321080A JP S5746600 A JPS5746600 A JP S5746600A
Authority
JP
Japan
Prior art keywords
bobbin
centering
plate
center
centering plate
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
JP12321080A
Other languages
Japanese (ja)
Inventor
Minoru Sato
Susumu Mizukoshi
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic Corp
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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP12321080A priority Critical patent/JPS5746600A/en
Publication of JPS5746600A publication Critical patent/JPS5746600A/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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering

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 make accurate centering possible, by arranging a centering plate, which is constituted with a synthetic resin plate of heat contractility, on the end face of a center pole concentrically and by placing a bobbin in the center of a magnetic gap. CONSTITUTION:A center hole 12a of a centering plate 12 which has such diameter that the centering plate 12 can be brought into contact with the inside circumferential face of a bobbin 13 and is formed with resin of heat contractility is fitted to a projection 11 formed in the center position of the end face of a center pole 10 forming a magnetic circuit. When the inside circumferential face of the bobbin 13 is brought into contact with the centering plate 12, a voice coil 14 is placed in the center position of a magnetic gap 15 to make centering accurate; and under this state, when the whole of the speaker unit is put at a temperature where the centering plate 12 is contracted thermally, the plate 12 is contracted uniformly in the diameter direction, and a uniform gap is obtained for the bobbin 13 to allow piston motion of the bobbin.
JP12321080A 1980-09-04 1980-09-04 Speaker unit Pending JPS5746600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12321080A JPS5746600A (en) 1980-09-04 1980-09-04 Speaker unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12321080A JPS5746600A (en) 1980-09-04 1980-09-04 Speaker unit

Publications (1)

Publication Number Publication Date
JPS5746600A true JPS5746600A (en) 1982-03-17

Family

ID=14854915

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12321080A Pending JPS5746600A (en) 1980-09-04 1980-09-04 Speaker unit

Country Status (1)

Country Link
JP (1) JPS5746600A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100989809B1 (en) 2010-02-25 2010-10-29 민진영 Magnetic circuit having single magnets, sound wave actuator using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100989809B1 (en) 2010-02-25 2010-10-29 민진영 Magnetic circuit having single magnets, sound wave actuator using the same

Similar Documents

Publication Publication Date Title
JPS5746600A (en) Speaker unit
JPS5284722A (en) Thin film magnetic head and its production
JPS5718200A (en) Plane type loudspeaker
JPS51140708A (en) Magnetic head
JPS5771530A (en) Pickup device
JPS54138065A (en) Device for manufacturing plastic magnet
SE7604342L (en) PICKUP
JPS5241520A (en) Electroacoustic converter
JPS5376399A (en) Manufacturing of amorphous ferromagnetic film
JPS6413203A (en) Thin film electromagnet impressing magnetic field for optical magnetic disk
JPS5333596A (en) Superconductive magnet device
JPS5646656A (en) Ignition signal generator
JPS5787296A (en) Assembling tool for loudspeaker
JPS5727418A (en) Magnetic head
JPS5216623A (en) Ignition coils made of molded synthetic resin
JPS5546663A (en) Magnetic circuit for mc shape cartridge
JPS57208847A (en) Carrying jig for coil combining bobbin
CH372392A (en) Refrigerated electric coil for the production of a high intensity magnetic field
JPS5597798A (en) Production of magnetic circuit for electroacoustic transducer
JPS56127916A (en) Manufacture of magnetic head core
JPS5225602A (en) Dynamic pickup
JPS5784108A (en) Polarized electromagnet
JPS55138807A (en) Cooler for shifting magnetic field generator
JPS5244627A (en) Magnet core type speaker
JPS5771511A (en) Magnetic head and its production