JPS5545211A - Substantial diaphragm - Google Patents

Substantial diaphragm

Info

Publication number
JPS5545211A
JPS5545211A JP11793678A JP11793678A JPS5545211A JP S5545211 A JPS5545211 A JP S5545211A JP 11793678 A JP11793678 A JP 11793678A JP 11793678 A JP11793678 A JP 11793678A JP S5545211 A JPS5545211 A JP S5545211A
Authority
JP
Japan
Prior art keywords
diaphragm
foamed resin
concave
foams
continuous foams
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
JP11793678A
Other languages
Japanese (ja)
Inventor
Takahiko Iriko
Shinichiro Kawamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11793678A priority Critical patent/JPS5545211A/en
Publication of JPS5545211A publication Critical patent/JPS5545211A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Abstract

PURPOSE:To obtain a light-weight and high-hardness diaphragm by filling up the concave of a speaker diaphragm with foamed resin consisting of continuous foams and making the acoustic radiation face, which is formed by foamed resin, of continuous foams. CONSTITUTION:The concave of diaphragm 7 is filled up with foamed resin 9 which has an adhesion property to diaphragm 7 and consists of continuous foams. Hard foamed urethane resin is used as this foamed resin 9, Acoustic radiation face 10 is formed by foaming foamed resin 9 in the concave of diaphragm 7 and cutting off a needless part after causing foamed resin 9 to adhere to diaphragm 7. As a result, the whole of the concave of diapheragm 7 is filled up with foamed resin 9 which has an adhesion property to diaphragm 7 and consists of continuous foams, so that characteristic can be improved. Further, the diaphragm can be made low-density and light-weight because the hardness of foamed resin of continuous foams is smaller than that of independent foams.
JP11793678A 1978-09-27 1978-09-27 Substantial diaphragm Pending JPS5545211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11793678A JPS5545211A (en) 1978-09-27 1978-09-27 Substantial diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11793678A JPS5545211A (en) 1978-09-27 1978-09-27 Substantial diaphragm

Publications (1)

Publication Number Publication Date
JPS5545211A true JPS5545211A (en) 1980-03-29

Family

ID=14723871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11793678A Pending JPS5545211A (en) 1978-09-27 1978-09-27 Substantial diaphragm

Country Status (1)

Country Link
JP (1) JPS5545211A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5991425A (en) * 1996-12-13 1999-11-23 Sony Corporation Low reflection/low diffraction treatment for loudspeaker transducer diaphragm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5991425A (en) * 1996-12-13 1999-11-23 Sony Corporation Low reflection/low diffraction treatment for loudspeaker transducer diaphragm

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