JPS5763997A - Speaker diaphragm - Google Patents

Speaker diaphragm

Info

Publication number
JPS5763997A
JPS5763997A JP13940180A JP13940180A JPS5763997A JP S5763997 A JPS5763997 A JP S5763997A JP 13940180 A JP13940180 A JP 13940180A JP 13940180 A JP13940180 A JP 13940180A JP S5763997 A JPS5763997 A JP S5763997A
Authority
JP
Japan
Prior art keywords
inclination
density
flat plate
porous resin
rotary
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
JP13940180A
Other languages
Japanese (ja)
Inventor
Yoshio Ariki
Makoto Kobashi
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 JP13940180A priority Critical patent/JPS5763997A/en
Publication of JPS5763997A publication Critical patent/JPS5763997A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To control the diameter of a nodal ring according to the degree of inclination, by producing a flat plate giving the compression to the porous resin formed into a rotary trapezoid and giving a continous inclination of density from the center toward the circumference of the flat plate. CONSTITUTION:A chevron part 4a of a porous resin matter 4 formed into a rotary trapezoid using the lower bottoms of trapezoids a, b, c, and d for a rotary shaft A is crashed by the compression to obtain a porous resin flat plate 4' having the same from as a flat plate 4b. Thus the plate 4' is composed of a core material having a continuous inclination of density as shown by a and a characteristic broken line 6 to the displacement toward the diameter in the density characteristic diagram. The inclination of density of the line 6 can be controlled by the ratio between the upper bottoms (distance between a and b) and the lower bottoms (distance between c and d) of the trapezoids, a, b, c and d. In addition, a metallic foil or a plastic film is stuck on a single or both surfaces of the core material as a surface material.
JP13940180A 1980-10-07 1980-10-07 Speaker diaphragm Pending JPS5763997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13940180A JPS5763997A (en) 1980-10-07 1980-10-07 Speaker diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13940180A JPS5763997A (en) 1980-10-07 1980-10-07 Speaker diaphragm

Publications (1)

Publication Number Publication Date
JPS5763997A true JPS5763997A (en) 1982-04-17

Family

ID=15244401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13940180A Pending JPS5763997A (en) 1980-10-07 1980-10-07 Speaker diaphragm

Country Status (1)

Country Link
JP (1) JPS5763997A (en)

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