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GB1186722A - Diaphragm for Flat Plate-Type Loud Speaker - Google Patents

Diaphragm for Flat Plate-Type Loud Speaker

Info

Publication number
GB1186722A
GB1186722A GB01216/67A GB1121667A GB1186722A GB 1186722 A GB1186722 A GB 1186722A GB 01216/67 A GB01216/67 A GB 01216/67A GB 1121667 A GB1121667 A GB 1121667A GB 1186722 A GB1186722 A GB 1186722A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
ribs
driving means
speaker
moulded
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.)
Expired
Application number
GB01216/67A
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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
Priority claimed from JP4106566U external-priority patent/JPS4427432Y1/ja
Priority claimed from JP6461866U external-priority patent/JPS459353Y1/ja
Application filed by Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Publication of GB1186722A publication Critical patent/GB1186722A/en
Expired 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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • 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

Landscapes

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

Abstract

1,186,722. Diaphragms. NIPPON GAKKI CO. Ltd. 9 March, 1967 [6 April, 1966; 19 April, 1966; 3 May, 1966; 7 July, 1966], No. 11216/67. Heading H4J. A flat-plate type diaphragm for a loud-speaker is of conical form at the area to be driven by the driving means and composed of foamed resin material. The diaphragm is designed so as to reduce secondary and tertiary vibration modes. In an arrangement, Fig. 3, the diaphragm 2 is of foamed polystyrene, polyvinyl chloride, polyethylene, polyamide, polyurethane or ABS or other foamed resin &c., and is mounted in a frame with the driving means at the centre. Unwanted vibrations are reduced by radial riblike parts which may be straight or curved, and marginal areas arranged as a continuous or discontinuous zone around the edge of the diaphragm and made of lossy resinous material. The rib-like parts may be of the above-mentioned materials and may be formed on both sides of the diaphragm. (In the case of identical material for diaphragm and ribs, the whole is moulded as an integral unit.) Alternatively, the ribs are of aluminium foil or paper. Instead of ribs, reinforced regions comprising thermosetting resin may be mixed with the material of the diaphragm. For the marginal areas, regions of high absorption for vibrational energy are provided by applying a layer of thermoplastic resin to the surface or mixing it with the material of the diaphragm. Figs. 4-6 (not shown), illustrate an arrangement of a diaphragm of trapezoidal shape having two strengthening ribs which are used to suppress the tertiary vibration mode. Figs. 7-11 (not shown) illustrate a moving coil loud-speaker of deformed oval shape. This has curved radial damping ribs, which may be moulded with the diaphragm or be attached as strips of aluminium foil, paper &c. The diaphragm is screwed to the frame holding the driving means.
GB01216/67A 1966-04-06 1967-03-09 Diaphragm for Flat Plate-Type Loud Speaker Expired GB1186722A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP3178766 1966-04-06
JP2474666 1966-04-19
JP2474566 1966-04-19
JP4106566U JPS4427432Y1 (en) 1966-05-03 1966-05-03
JP6461866U JPS459353Y1 (en) 1966-07-07 1966-07-07
JP7254766 1966-11-02

Publications (1)

Publication Number Publication Date
GB1186722A true GB1186722A (en) 1970-04-02

Family

ID=27549208

Family Applications (1)

Application Number Title Priority Date Filing Date
GB01216/67A Expired GB1186722A (en) 1966-04-06 1967-03-09 Diaphragm for Flat Plate-Type Loud Speaker

Country Status (8)

Country Link
US (1) US3464514A (en)
AT (1) AT301644B (en)
DE (1) DE1299041B (en)
FR (1) FR1517610A (en)
GB (1) GB1186722A (en)
NL (1) NL144117B (en)
NO (1) NO119596B (en)
SE (1) SE342962B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711996A1 (en) * 1976-03-19 1977-09-29 Hugh Dudley Harwood MEMBRANE FOR A SPEAKER
GB2182823A (en) * 1985-11-07 1987-05-20 Midlen Trading Corp Diaphragm and driver for a loudspeaker
US4928312A (en) * 1988-10-17 1990-05-22 Amel Hill Acoustic transducer
GB2360665A (en) * 1998-06-22 2001-09-26 Slab Technology Ltd Planar loudspeakers
GB2435008A (en) * 2001-01-29 2007-08-15 Tannoy Ltd An injection moulded loudspeaker diaphragm and a method of manufacture
GB2489700A (en) * 2011-04-04 2012-10-10 Canon Kk Controlling the vibration modes of a vibrating support

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979566A (en) * 1973-12-12 1976-09-07 Erazm Alfred Willy Electromagnetic transducer
GB1510797A (en) * 1974-11-28 1978-05-17 Bertagni J Diaphragm for use in an electroacoustic transducer
US4323737A (en) * 1979-06-30 1982-04-06 Pioneer Electronic Corporation Driver unit for planar diaphragm type loudspeaker
US4581496A (en) * 1979-09-04 1986-04-08 Emhart Industries, Inc. Diaphragm for attenuating harmonic response in an electroacoustic transducer
US4761817A (en) * 1986-01-27 1988-08-02 Harman International Industries, Incorporated Diaphragm structure for a transducer
KR100842606B1 (en) * 2002-04-12 2008-07-01 엘지전자 주식회사 Speaker with low distortion wired diaphragm
US7177440B2 (en) * 2002-12-31 2007-02-13 Step Technologies Inc. Electromagnetic transducer with asymmetric diaphragm
CA2539228A1 (en) * 2003-09-18 2005-03-31 John M. Norton Audio loudspeaker enclosure
US7845461B2 (en) * 2007-08-10 2010-12-07 Victor Company Of Japan, Limited Acoustic diaphragm and speaker
WO2009080055A1 (en) * 2007-12-20 2009-07-02 Scan-Speak A/S Asymmetric reinforcement of a membrane
JP5602978B2 (en) * 2012-09-26 2014-10-08 京セラ株式会社 SOUND GENERATOR, SOUND GENERATOR, AND ELECTRONIC DEVICE
US9628917B2 (en) * 2014-07-23 2017-04-18 Bose Corporation Sound producing system
IT201600082006A1 (en) 2016-08-03 2018-02-03 Enrico Ciresa S R L SOUND DIFFUSER ACCESSORY
US11974111B2 (en) 2019-07-29 2024-04-30 Polk Audio, Llc Loudspeaker cone with raised curved protrusions and method for controlling resonant modes

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1990409A (en) * 1932-02-19 1935-02-05 Neville Athol Ernest Acoustical diaphragm
DE900228C (en) * 1937-01-20 1953-12-21 Dr Emil Podszus Membrane of great rigidity for sound reproduction
DE835757C (en) * 1949-10-26 1952-04-03 Klangfilm G M B H Dome membrane for funnel loudspeaker
USRE24141E (en) * 1952-10-25 1956-04-10 Method of making the same
US2905260A (en) * 1955-02-24 1959-09-22 Muter Company Loud speaker diaphragm
US2960177A (en) * 1957-11-25 1960-11-15 Hawley Products Co Acoustical devices
GB852006A (en) * 1957-11-25 1960-10-19 Hawley Products Co Improvements in or relating to loudspeaker diaphragms
US3180945A (en) * 1961-09-22 1965-04-27 Wm H Welsh Co Inc Loudspeaker
NL283889A (en) * 1961-10-04
NL287574A (en) * 1962-01-15
US3247925A (en) * 1962-03-08 1966-04-26 Lord Corp Loudspeaker

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711996A1 (en) * 1976-03-19 1977-09-29 Hugh Dudley Harwood MEMBRANE FOR A SPEAKER
GB2182823A (en) * 1985-11-07 1987-05-20 Midlen Trading Corp Diaphragm and driver for a loudspeaker
US4928312A (en) * 1988-10-17 1990-05-22 Amel Hill Acoustic transducer
GB2360665A (en) * 1998-06-22 2001-09-26 Slab Technology Ltd Planar loudspeakers
GB2360665B (en) * 1998-06-22 2003-01-15 Slab Technology Ltd Loudspeakers
GB2435008A (en) * 2001-01-29 2007-08-15 Tannoy Ltd An injection moulded loudspeaker diaphragm and a method of manufacture
GB2435008B (en) * 2001-01-29 2007-11-21 Tannoy Ltd Loudspeaker diaphragm and method of manufacture thereof
GB2489700A (en) * 2011-04-04 2012-10-10 Canon Kk Controlling the vibration modes of a vibrating support
GB2489700B (en) * 2011-04-04 2013-09-18 Canon Kk Method and device for controlling the vibration modes of a vibrating support

Also Published As

Publication number Publication date
AT301644B (en) 1972-09-11
NL6702816A (en) 1967-10-09
SE342962B (en) 1972-02-21
NO119596B (en) 1970-06-08
US3464514A (en) 1969-09-02
FR1517610A (en) 1968-03-15
DE1299041B (en) 1969-07-10
NL144117B (en) 1974-11-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE Patent expired