JPS56161798A - Dynamic type speaker - Google Patents

Dynamic type speaker

Info

Publication number
JPS56161798A
JPS56161798A JP6556080A JP6556080A JPS56161798A JP S56161798 A JPS56161798 A JP S56161798A JP 6556080 A JP6556080 A JP 6556080A JP 6556080 A JP6556080 A JP 6556080A JP S56161798 A JPS56161798 A JP S56161798A
Authority
JP
Japan
Prior art keywords
magnetic
substance
cooling liquid
ring shape
liquid
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.)
Granted
Application number
JP6556080A
Other languages
Japanese (ja)
Other versions
JPS6134720B2 (en
Inventor
Toshio Shimizu
Masaharu Ono
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 JP6556080A priority Critical patent/JPS56161798A/en
Publication of JPS56161798A publication Critical patent/JPS56161798A/en
Publication of JPS6134720B2 publication Critical patent/JPS6134720B2/ja
Granted 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
    • H04R9/022—Cooling arrangements

Abstract

PURPOSE:To prevent cooling liquid from being jumped out due to shock, by sealing nonmagnetic perforated substance including cooling liquid and magnetic liquid sealing the cooling liquid, in a ring shape magnetic air gap, and cooling a voice coil in the magnetic air gap. CONSTITUTION:Ring shape grooves 6, 6' are provided at a part in which a center pole 2 and a yoke 5 are opposed out of a yokes 1, 5, center pole 2 and a magnet 4 forming a ring shape magnetic air gap. Further, a magnetic liquid 11 scattering magnetic ultra fine particles in coroid in nonvolatile solvent is filled in the grooves 6, 6' to prevent the leakage of the cooling liquid. A ring shape perforated substance 15 of nonmagnetic substance is contained in the gap in the magnetic circuit so that the substance 15 is not allowed to contact with a voice coil 10, and in the magnetic gap, a cooling liquid 12 with good heat transfer such as high class alcohol, glycerol and water and without compatibility for a magnetic liquid 11, is put in. The perforated substance 15 is formed with metal baking nonmagnetic substance powder such as copper, blowing metal, or ceramic material such as aluminum oxide.
JP6556080A 1980-05-16 1980-05-16 Dynamic type speaker Granted JPS56161798A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6556080A JPS56161798A (en) 1980-05-16 1980-05-16 Dynamic type speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6556080A JPS56161798A (en) 1980-05-16 1980-05-16 Dynamic type speaker

Publications (2)

Publication Number Publication Date
JPS56161798A true JPS56161798A (en) 1981-12-12
JPS6134720B2 JPS6134720B2 (en) 1986-08-08

Family

ID=13290509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6556080A Granted JPS56161798A (en) 1980-05-16 1980-05-16 Dynamic type speaker

Country Status (1)

Country Link
JP (1) JPS56161798A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311438A (en) * 1996-03-21 1997-09-24 Sennheiser Electronic Electrodynamic transducer with a moving coil in a magnetic air gap acoustically sealed by a liquid or solid medium
CN105282668A (en) * 2015-11-18 2016-01-27 成都旭光光电技术有限责任公司 A transducer with an aluminum ring used for fixing magnetic steel and a manufacture method thereof
CN105451146A (en) * 2015-11-18 2016-03-30 成都旭光光电技术有限责任公司 Sound wave rejection instrument
WO2021205295A1 (en) 2020-04-08 2021-10-14 OLTRAMARE, Michel Dual axial magnetic flux induction speaker
US11930340B2 (en) 2019-02-06 2024-03-12 Michel OLTRAMARE System for cooling the stationary winding of an induction motor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311438A (en) * 1996-03-21 1997-09-24 Sennheiser Electronic Electrodynamic transducer with a moving coil in a magnetic air gap acoustically sealed by a liquid or solid medium
GB2311438B (en) * 1996-03-21 2000-02-23 Sennheiser Electronic Electrodynamic acoustic transducer with magnetic gap sealing
US6208743B1 (en) 1996-03-21 2001-03-27 Sennheiser Electronic Gmbh & Co. K.G. Electrodynamic acoustic transducer with magnetic gap sealing
CN105282668A (en) * 2015-11-18 2016-01-27 成都旭光光电技术有限责任公司 A transducer with an aluminum ring used for fixing magnetic steel and a manufacture method thereof
CN105451146A (en) * 2015-11-18 2016-03-30 成都旭光光电技术有限责任公司 Sound wave rejection instrument
US11930340B2 (en) 2019-02-06 2024-03-12 Michel OLTRAMARE System for cooling the stationary winding of an induction motor
WO2021205295A1 (en) 2020-04-08 2021-10-14 OLTRAMARE, Michel Dual axial magnetic flux induction speaker

Also Published As

Publication number Publication date
JPS6134720B2 (en) 1986-08-08

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