JPS57148498A - Dynamic speaker - Google Patents

Dynamic speaker

Info

Publication number
JPS57148498A
JPS57148498A JP3360981A JP3360981A JPS57148498A JP S57148498 A JPS57148498 A JP S57148498A JP 3360981 A JP3360981 A JP 3360981A JP 3360981 A JP3360981 A JP 3360981A JP S57148498 A JPS57148498 A JP S57148498A
Authority
JP
Japan
Prior art keywords
diaphragm
coil
magnetic
projected
magnetic clearance
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
JP3360981A
Other languages
Japanese (ja)
Inventor
Fumikazu Murakami
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP3360981A priority Critical patent/JPS57148498A/en
Publication of JPS57148498A publication Critical patent/JPS57148498A/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
    • 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

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 shorten the length of a magnetic clearance and to improve the conversion efficiency of a small sized speaker, by fixing the coil to plural coil supports, and fitting the supports to a diaphragm and, at the same time, inserting the coil into a magnetic clearance between two magnetic materials opposing to each other. CONSTITUTION:Two projected pillars 9 are formed to a central diaphragm 9 of a dynamic speaker at the time of injection molding, and the outer periphery of the diaphragm 8 is fixed to another diaphragm 1, and then, the outer peripheral margin of the diaphragm 1 is supported by a frame 6. Moreover, a voice coil 2 formed to a cylindrical shape is fitted to the projected pillars 9 formed to the diaphragm 9. This coil 2 is inserted into a magnetic clearance 7 opposedly formed between the outer peripheral face of an upper plate 3 and the inner surface of the vertical section formed at the peripheral margin of a lower plate 5. Moreover, a notch 10 is formed into the face of the plate 3 opposing to the projected pillar 9 and a magnet 4 is placed between the plates 3 and 5. The length of the magnetic clearance 7 is shortened so as to improve the conversion efficiency of the small sized speaker.
JP3360981A 1981-03-09 1981-03-09 Dynamic speaker Pending JPS57148498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3360981A JPS57148498A (en) 1981-03-09 1981-03-09 Dynamic speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3360981A JPS57148498A (en) 1981-03-09 1981-03-09 Dynamic speaker

Publications (1)

Publication Number Publication Date
JPS57148498A true JPS57148498A (en) 1982-09-13

Family

ID=12391198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3360981A Pending JPS57148498A (en) 1981-03-09 1981-03-09 Dynamic speaker

Country Status (1)

Country Link
JP (1) JPS57148498A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356433A1 (en) * 1987-04-08 1990-03-07 Harman International Industries, Incorporated Shallow loudspeaker
EP1128705A2 (en) * 2000-02-25 2001-08-29 Star Micronics Co., Ltd. Speaker
US7081203B2 (en) 2004-03-16 2006-07-25 Glenn Helm Compact surface mounted on-site wastewater treatment unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356433A1 (en) * 1987-04-08 1990-03-07 Harman International Industries, Incorporated Shallow loudspeaker
EP1128705A2 (en) * 2000-02-25 2001-08-29 Star Micronics Co., Ltd. Speaker
EP1128705A3 (en) * 2000-02-25 2003-01-02 Star Micronics Co., Ltd. Speaker
US7081203B2 (en) 2004-03-16 2006-07-25 Glenn Helm Compact surface mounted on-site wastewater treatment unit

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