JPS56169994A - Construction of dynamic type sound body - Google Patents

Construction of dynamic type sound body

Info

Publication number
JPS56169994A
JPS56169994A JP7455380A JP7455380A JPS56169994A JP S56169994 A JPS56169994 A JP S56169994A JP 7455380 A JP7455380 A JP 7455380A JP 7455380 A JP7455380 A JP 7455380A JP S56169994 A JPS56169994 A JP S56169994A
Authority
JP
Japan
Prior art keywords
magnet
lower yoke
yoke
voice coil
diaphragm 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
JP7455380A
Other languages
Japanese (ja)
Inventor
Hironori Nomura
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 Watch Co Ltd
Original Assignee
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 Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP7455380A priority Critical patent/JPS56169994A/en
Publication of JPS56169994A publication Critical patent/JPS56169994A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

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 increase the efficiency of electroacoustic conversion efficiency and to obtain good sound producing characteristic and low cost construction, by forming the magnetic core of a dynamic type sound body used for a wrist watch by integral contraction with a yoke. CONSTITUTION:A magnetic core 1 incorporated with a lower yoke 2 is formed by contracting a material with good permeability such as iron and permalloy. Next, heat treatment is made as required, and a magnet seat 8 made of, e.g., bronze is placed on the upper surface of the lower yoke 2, and a magnet 4 having the polarity radially is pushed in so that the external circumference is in contact with the inner circumference of the wall of the lower yoke 2. A voice coil 5 wound on a voice coil bobbin 6 fixed to a diaphragm plate 7 is inserted outside the magnet core 1 and inside the magnet 4, and an upper yoke 3 is located at the external circumference of the diaphragm plate 7, and it is fixed with the lower yoke 2 to enclose the diaphragm plate 7. Next, a connecting terminal is connected to the voice coil 5. Thus, the magnet core 1 and the lower yoke 2 are incorporated to reduce the magnetic loss and to form the magnetic circuit with good efficiency.
JP7455380A 1980-06-03 1980-06-03 Construction of dynamic type sound body Pending JPS56169994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7455380A JPS56169994A (en) 1980-06-03 1980-06-03 Construction of dynamic type sound body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7455380A JPS56169994A (en) 1980-06-03 1980-06-03 Construction of dynamic type sound body

Publications (1)

Publication Number Publication Date
JPS56169994A true JPS56169994A (en) 1981-12-26

Family

ID=13550538

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7455380A Pending JPS56169994A (en) 1980-06-03 1980-06-03 Construction of dynamic type sound body

Country Status (1)

Country Link
JP (1) JPS56169994A (en)

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