JPS56169995A - Construction of dynamic type sound producing element - Google Patents

Construction of dynamic type sound producing element

Info

Publication number
JPS56169995A
JPS56169995A JP7455480A JP7455480A JPS56169995A JP S56169995 A JPS56169995 A JP S56169995A JP 7455480 A JP7455480 A JP 7455480A JP 7455480 A JP7455480 A JP 7455480A JP S56169995 A JPS56169995 A JP S56169995A
Authority
JP
Japan
Prior art keywords
magnet
lower yoke
yoke
magnet core
construction
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
JP7455480A
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 JP7455480A priority Critical patent/JPS56169995A/en
Publication of JPS56169995A publication Critical patent/JPS56169995A/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 electroacoustic conversion efficiency and to obtain the construction with good sound production characteristic and low cost, by forming the magnet core of a dynamic type sound body used for a wrist watch with coining incorporated with a yoke. CONSTITUTION:A magnet core 1 incorporated with a lower yoke 2 is formed by coining or forging processing of material good for permeability such as iron and permalloy. Next, the treatment is made as required, a magnet seat 8 made of, e.g., bronze is located on the upper surface of the lower yoke 2, and a magnet 4 having the polarity radially is pushed in so that the outer circumference is allowed to contact with the inside of the wall of the lower yoke 2. A voice coil 5 wound on a coil bobbin 6 is inserted to the outside of the magnet core 1 and the inside of the magnet 4, and an upper yoke 3 is located on the outer circumference of the diaphragm plate 7 and it is fixed with the lower yoke 2 so that it encloses the diaphragm plate 7. Next, a terminal 9 is connected to the coil 5. Thus, an efficient magnetic circuit is formed by forming the magnet core 1 and the lower yoke 2 incorporatedly.
JP7455480A 1980-06-03 1980-06-03 Construction of dynamic type sound producing element Pending JPS56169995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7455480A JPS56169995A (en) 1980-06-03 1980-06-03 Construction of dynamic type sound producing element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7455480A JPS56169995A (en) 1980-06-03 1980-06-03 Construction of dynamic type sound producing element

Publications (1)

Publication Number Publication Date
JPS56169995A true JPS56169995A (en) 1981-12-26

Family

ID=13550563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7455480A Pending JPS56169995A (en) 1980-06-03 1980-06-03 Construction of dynamic type sound producing element

Country Status (1)

Country Link
JP (1) JPS56169995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138118B1 (en) 2010-03-23 2012-04-25 서기영 Flat Type Speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138118B1 (en) 2010-03-23 2012-04-25 서기영 Flat Type Speaker

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