EP0262406A3 - Electro-acoustic transducer with diaphragm and blank therefor - Google Patents

Electro-acoustic transducer with diaphragm and blank therefor Download PDF

Info

Publication number
EP0262406A3
EP0262406A3 EP87112525A EP87112525A EP0262406A3 EP 0262406 A3 EP0262406 A3 EP 0262406A3 EP 87112525 A EP87112525 A EP 87112525A EP 87112525 A EP87112525 A EP 87112525A EP 0262406 A3 EP0262406 A3 EP 0262406A3
Authority
EP
European Patent Office
Prior art keywords
diaphragm
sheet
conductors
corrugated sheet
blank
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.)
Withdrawn
Application number
EP87112525A
Other languages
German (de)
French (fr)
Other versions
EP0262406A2 (en
Inventor
David A. Larson
Daniel A. Shumaker.
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US06/389,423 external-priority patent/US4491698A/en
Application filed by Individual filed Critical Individual
Priority to EP87112525A priority Critical patent/EP0262406A3/en
Publication of EP0262406A2 publication Critical patent/EP0262406A2/en
Publication of EP0262406A3 publication Critical patent/EP0262406A3/en
Withdrawn legal-status Critical Current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
    • H04R7/04—Plane diaphragms
    • 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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • 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
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers

Abstract

This disclosure relates to an electro-acoustic transducer with a diaphragm (12) consisting of a corrugated sheet (34A) and a thin flat shet (32). The corrugated sheet has a plurality of conductors (36, 39) in rearwardly extending projections (P) and sheet (32) is secured to the front, flat surface (29) of the corrugated sheet (34A). With conventional diaphragms, the corrugations on the sheet are not secured to each other thereby resulting in a flimsy structure with an uneven front surface which prevents sound waves emanating from the surface from being in phase. The front sheet of the diaphragm (12) rigidifies it such that the corrugated sheet (34A) remains even and the projections (P) remain in alignment with the pole pieces (44, 46) of the magnet assembly (14). To obtain good frequency response and the desired impedance, more conductors are necessary than those used in the conventional diaphragms. The conductors (36, 39) in the present invention are deposited on a blank (34) directly opposite each other such that the blank can be readily folded without bowing or being otherwise deformed. Also, as the diaphragm (12) is oscillated, air is forced around the conductors (36, 39) and vented through the gaps in the magnet assembly (14) thereby relieving heat buildup.
EP87112525A 1982-06-17 1983-06-16 Electro-acoustic transducer with diaphragm and blank therefor Withdrawn EP0262406A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP87112525A EP0262406A3 (en) 1982-06-17 1983-06-16 Electro-acoustic transducer with diaphragm and blank therefor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US06/389,423 US4491698A (en) 1982-06-17 1982-06-17 Electro-acoustic transducer with diaphragm and blank therefor
US389423 1982-06-17
EP87112525A EP0262406A3 (en) 1982-06-17 1983-06-16 Electro-acoustic transducer with diaphragm and blank therefor

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP83902368A Division EP0112383B1 (en) 1982-06-17 1983-06-16 Electro-acoustic transducer with diaphragm
EP83902368.6 Division 1983-06-16

Publications (2)

Publication Number Publication Date
EP0262406A2 EP0262406A2 (en) 1988-04-06
EP0262406A3 true EP0262406A3 (en) 1988-08-31

Family

ID=26108415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112525A Withdrawn EP0262406A3 (en) 1982-06-17 1983-06-16 Electro-acoustic transducer with diaphragm and blank therefor

Country Status (1)

Country Link
EP (1) EP0262406A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6449376B1 (en) 1999-09-20 2002-09-10 Boston Acoustics, Inc. Planar-type loudspeaker with at least two diaphragms
JP4898958B2 (en) * 2008-07-10 2012-03-21 パイオニア株式会社 Speaker device
CN115379361A (en) * 2022-09-28 2022-11-22 韩基岩 Vibrating diaphragm array

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE483871A (en) *
US1958423A (en) * 1932-12-15 1934-05-15 Duffy Charles Hugh Radio loud speaker
US3674946A (en) * 1970-12-23 1972-07-04 Magnepan Inc Electromagnetic transducer
FR2427753A1 (en) * 1978-06-01 1979-12-28 Sawafuji Tadashi ACOUSTIC TRANSDUCERS
GB2029162A (en) * 1978-08-18 1980-03-12 Sumitomo Bakelite Co Electroacoustic transducers
BE887973A (en) * 1980-03-06 1981-07-16 3 A Art Et Acoustique Applique ELECTRODYNAMIC SPEAKER

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953757B2 (en) * 1980-07-30 1984-12-26 オンキヨー株式会社 Diaphragm of planar drive speaker

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE483871A (en) *
US1958423A (en) * 1932-12-15 1934-05-15 Duffy Charles Hugh Radio loud speaker
US3674946A (en) * 1970-12-23 1972-07-04 Magnepan Inc Electromagnetic transducer
FR2427753A1 (en) * 1978-06-01 1979-12-28 Sawafuji Tadashi ACOUSTIC TRANSDUCERS
GB2029162A (en) * 1978-08-18 1980-03-12 Sumitomo Bakelite Co Electroacoustic transducers
BE887973A (en) * 1980-03-06 1981-07-16 3 A Art Et Acoustique Applique ELECTRODYNAMIC SPEAKER

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 99 (E-111)[977], 8th June 1982; & JP-A-57 30 499 (ONKYO K.K.) 18-02-1982 *

Also Published As

Publication number Publication date
EP0262406A2 (en) 1988-04-06

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Inventor name: SHUMAKER. DANIEL A.

Inventor name: LARSON, DAVID A.