JPS56169997A - Construction of electromagnetic type sound producing element - Google Patents

Construction of electromagnetic type sound producing element

Info

Publication number
JPS56169997A
JPS56169997A JP7455280A JP7455280A JPS56169997A JP S56169997 A JPS56169997 A JP S56169997A JP 7455280 A JP7455280 A JP 7455280A JP 7455280 A JP7455280 A JP 7455280A JP S56169997 A JPS56169997 A JP S56169997A
Authority
JP
Japan
Prior art keywords
magnet
forming
efficiency
construction
lower yoke
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
JP7455280A
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 JP7455280A priority Critical patent/JPS56169997A/en
Publication of JPS56169997A publication Critical patent/JPS56169997A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromechanical Clocks (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

PURPOSE:To increase the efficiency of electroacoustic conversion and to obtain the construction with good sound producing characteristic and low cost, by forming a magnet core and a lower yoke incorporatedly in an electromagnetic type sound body used for a wrist watch. CONSTITUTION:A magnet core 1 incorporated with a lower yoke 2 is formed by forming a material with good permeability such as iron and permalloy with contraction. Next, heat treatment is made as required, and a coil 5 is assembled with a magnet 4 processed in ring shape in advance and the assembly is fixed by mounting an upper yoke 3 and external frame 8. Further, the magnet 4 is magnetized and a diaphragm plate 6 welded with an electromagnetic plate 7 is located on the outer frame 8 and fixed along the external circumference. Next, a connecting terminal 9 is connected to the coil 5. Thus, by forming the magnet core 1 and the lower yoke 2 incorporatedly, the magnetic loss is reduced and a magnetic circuit with good efficiency is formed, allowing to increase the efficiency of electroacoustic conversion.
JP7455280A 1980-06-03 1980-06-03 Construction of electromagnetic type sound producing element Pending JPS56169997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7455280A JPS56169997A (en) 1980-06-03 1980-06-03 Construction of electromagnetic type sound producing element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7455280A JPS56169997A (en) 1980-06-03 1980-06-03 Construction of electromagnetic type sound producing element

Publications (1)

Publication Number Publication Date
JPS56169997A true JPS56169997A (en) 1981-12-26

Family

ID=13550511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7455280A Pending JPS56169997A (en) 1980-06-03 1980-06-03 Construction of electromagnetic type sound producing element

Country Status (1)

Country Link
JP (1) JPS56169997A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101562773A (en) * 2009-05-25 2009-10-21 颜忆冈 Process for producing electroacoustic trumpet T-iron
US20160261956A1 (en) * 2013-10-29 2016-09-08 Tmpgest Di Fedeli Danila & C. S.A.S. Electromagnetic transducer for generating vibrations for sound and/or words bone conduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101562773A (en) * 2009-05-25 2009-10-21 颜忆冈 Process for producing electroacoustic trumpet T-iron
US20160261956A1 (en) * 2013-10-29 2016-09-08 Tmpgest Di Fedeli Danila & C. S.A.S. Electromagnetic transducer for generating vibrations for sound and/or words bone conduction

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