EP0749265B1 - Hochfrequenzlautsprecher - Google Patents

Hochfrequenzlautsprecher Download PDF

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Publication number
EP0749265B1
EP0749265B1 EP96401270A EP96401270A EP0749265B1 EP 0749265 B1 EP0749265 B1 EP 0749265B1 EP 96401270 A EP96401270 A EP 96401270A EP 96401270 A EP96401270 A EP 96401270A EP 0749265 B1 EP0749265 B1 EP 0749265B1
Authority
EP
European Patent Office
Prior art keywords
loudspeaker
diaphragm
membrane
annular
fixed structure
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 - Lifetime
Application number
EP96401270A
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English (en)
French (fr)
Other versions
EP0749265A1 (de
Inventor
Philippe Lesage
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.)
Phl Audio Sa
Original Assignee
Phl Audio Sa
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 Phl Audio Sa filed Critical Phl Audio Sa
Publication of EP0749265A1 publication Critical patent/EP0749265A1/de
Application granted granted Critical
Publication of EP0749265B1 publication Critical patent/EP0749265B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery

Definitions

  • the present invention relates to a speaker for frequencies high.
  • a speaker has a vibrating membrane sound generator, said membrane being connected to this effect to a moving electromagnetic coil suspended in the air gap created by the pole pieces of a permanent magnet and powered by a representative electric current sounds to reproduce.
  • the present invention relates to more particularly a speaker with compression chamber.
  • compression chamber loudspeakers do not radiate directly into the air, but through through an acoustic pavilion. Such speakers therefore generally have an acoustic horn removable and a compression chamber motor.
  • said compression chamber motor it basically there are two different embodiments which are known and marketed.
  • the speaker membrane is made in the form of a rigid spherical cap, often metallic and fixed on the chassis of said speaker by means of a flexible suspension peripheral.
  • the moving electromagnetic coil is connected at the periphery of said membrane, between said membrane and said suspension, and, during a movement, it displaces said entire cap like a piston infinitely rigid. It will be noted that, by its flexibility, said suspension has for the function of ensuring the movement and guiding of the moving part of the loudspeaker.
  • diaphragm in a second embodiment, corresponding to a diaphragm tweeter, diaphragm includes a rigid central annular part and a part also rigid peripheral ring, connected together the along an annular junction opposite the pavilion of said speaker. Said annular parts are further connected to the chassis of said speaker via elastic suspensions, said elastic suspensions being formed by concentric softening lines to said annular parts, and generally practiced in these last.
  • the membrane is also moves like a piston extremely rigid.
  • this embodiment has the disadvantage larger than the membrane, too small in area, and whose suspension is too rigid, does not allow this speaker to operate from 500 Hz.
  • the object of the present invention is to remedy these drawbacks. It concerns a loudspeaker for frequencies high, lighter at equivalent performance than prior art speakers and susceptible to be carried out easily and at reduced cost, while allowing to emit sound waves according to a bandwidth very wide, especially towards high frequencies, with a Improved efficiency.
  • the loudspeaker for frequencies high with a vibrating membrane comprising a central annular part and an annular part peripheral connected together along an annular junction located opposite the waveguide of said loudspeaker, said membrane being connected at said junction annular to a suspended electromagnetic coil in the air gap of the pole pieces of a permanent magnet and powered by an electric current representative of the sounds to reproduce, is remarkable in that said membrane is made of a flexible and elastic material so as to present a defined deformation during the movement of said electromagnetic coil, and in that said annular parts are curved and are directly connected by their free end to a fixed structure of said loudspeaker, the convex side of said annular parts being arranged opposite said waveguide.
  • the bulging of said annular parts can take all possible forms, in particular that of an arc of circle or that of a half-torus.
  • At least one of said annular parts is connected to said fixed structure so as to form blades of air relative to said fixed structure.
  • said air gaps have a decreasing thickness gradually towards the membrane attachment area on the fixed structure.
  • said air knives can be formed on one side or on both sides of the membrane.
  • At least one of said annular parts is provided with softening lines radially uniformly distributed over the periphery of said annular part, which increases the flexibility of the membrane.
  • This flexibility can be increased, according to another mode of realization, by practicing at least on one of said annular parts of the radial slots uniformly distributed on the periphery of said annular part and in closing said slots by means of a flexible resin and elastic.
  • said waveguide is a horn and said membrane and said electromagnetic coil constitute a motor with compression chamber.
  • the loudspeaker for high frequencies 1 conforms to the invention and shown partially and schematically in the single figure usually comprises a coil electromagnetic 3, connected to a one-piece vibrating membrane 4, suspended in the air gap 5 of the pole pieces 6 and 7 a permanent magnet 8 and powered by a current electric representative of the sounds to reproduce.
  • the above elements are produced symmetrically relative to the X-X axis of said speaker 1.
  • the membrane 4 is of the type comprising an annular part central 9 and a peripheral annular part 10 connected together along an annular junction 11 which is located next to a waveguide which, in this case, is shown in the form of a flag 12.
  • the coil 3 is connected to said membrane 4 at this junction annular 11, directly facing the mouth of said pavilion 12.
  • said membrane 4 is produced in a flexible and elastic material, as light as possible, by example a composite material or a high modulus polymer of Young, so as to present a defined deformation during the movement of said electromagnetic coil 3, and said annular parts 10 and 9 are curved and are directly connected by their free end respectively 13 and 14 to a fixed structure specified below of the said loudspeaker 1, the convex side of said annular parts 9 and 10 being located opposite said pavilion 12.
  • a displacement of the coil 3 causes a deformation in the membrane 4, which moves from the junction 11 towards the ends 13 and 14 and which causes a variation in the local pressure, generating sound. Thanks to the invention, this variation in pressure is created near the coil 3 and it is oriented in the same direction as the propagation of the deformation in the membrane 4, which allows energy efficiency high with regard to energy transformation mechanical in acoustic energy.
  • the volume swept by the deformation of the membrane 4 can be higher than that swept by a rigid membrane of the same size moving like a piston, like this is generally the case for known membranes.
  • greater sensitivity is imparted to the speaker 1.
  • the bulging of said annular parts 9 and 10 can take all possible axisymmetric forms, in particularly that of an arc of a circle or that of a half-torus.
  • the free ends 13 and 14 of said annular parts 10 and 9 are fixed by being embedded between elements of the fixed structure of the loudspeaker 1, namely between said horn 12 and a fixing piece 15 for the end 13 and between a phasing part 16 and a attachment 17 for end 14.
  • said air knives 13A, 13B, 14A and 14B have thickness gradually decreasing towards the area fixing ends 13 and 14, which allows to spread in the frequency domain the advantageous effects generated by these air knives and specified below.
  • the piece of phasing 16 generally conical, can be very simple and inexpensive.
  • this fitting piece phase 16 the fixing piece 17 and the pole piece 7 are connected together by means of a screw 18 of axis X-X through an appropriately practiced cylindrical hole in these different rooms.
  • a screw 18 of axis X-X through an appropriately practiced cylindrical hole in these different rooms.
  • others fixing methods can be considered. It is the same for unspecified fixing of other parts of the loudspeaker 1.

Claims (10)

  1. Hochfrequenzlautsprecher (1), der eine schwingungsfähige Membran (4) aufweist, die einen mittleren ringförmigen Teil (9) und einen ringförmigen Umfangsteil (10) umfaßt, die entlang einer ringförmigen Verbindungsstelle (11), die sich einem Wellenleiter (12) des Lautsprechers (1) gegenüber befindet, miteinander verbunden sind, wobei die Membran (4) in Höhe der ringförmigen Verbindungsstelle (11) mit einer beweglichen elektromagnetischen Spule (3) verbunden ist, die im Luftspalt (5) der Polteile (6, 7) eines Permanentmagneten (8) aufgehängt ist und mit elektrischem Strom versorgt wird, der für die wiederzugebenden Töne repräsentativ ist, dadurch gekennzeichnet, daß die Membran (4) aus einem geschmeidigen und elastischen Material derart ausgeführt ist, daß sie bei Bewegungen der elektromagnetischen Spule (3) eine definierte Verformung zeigt, und daß die ringförmigen Teile (9, 10) gewölbt und mit ihrem freien Ende (13, 14) mit einem festen Aufbau des Lautsprechers (1) direkt verbunden sind, wobei die konvexe Seite der ringförmigen Teile (9, 10) dem Wellenleiter (12) gegenüber angeordnet ist.
  2. Lautsprecher nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens einer der ringförmigen Teile (9, 10) derart mit dem festen Aufbau verbunden ist, daß in Bezug auf den festen Aufbau dünne Luftstreifen (13A, 13B, 14A, 14B) gebildet werden.
  3. Lautsprecher nach Anspruch 2, dadurch gekennzeichnet, daß die dünnen Luftstreifen (13A, 13B, 14A, 14B) eine zur Zone der Befestigung der Membran (4) am festen Aufbau hin fortschreitend abnehmende Dicke aufweisen.
  4. Lautsprecher nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die dünnen Luftstreifen auf einer einzigen Seite der Membran gebildet werden.
  5. Lautsprecher nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die dünnen Luftstreifen (13A, 13B, 14A, 14B) auf beiden seiten der Membran (4) gebildet werden.
  6. Lautsprecher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens einer der ringförmigen Teile mit radialen Linien zum Geschmeidigmachen versehen ist, die über den Umfang des ringförmigen Teils gleichmäßig verteilt sind.
  7. Lautsprecher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens einer der ringförmigen Teile mit radialen Schlitzen versehen ist, die über den Umfang des ringförmigen Teils gleichmäßig verteilt und mittels eines geschmeidigen und elastischen Harzes geschlossen sind.
  8. Lautsprecher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Membran (4) aus einem Verbundwerkstoff ausgeführt ist.
  9. Lautsprecher nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Membran (4) aus einem Polymer mit hohem Elastizitätsmodul ausgeführt ist.
  10. Lautsprecher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Wellenleiter (12) ein Schalltrichter ist und daß die Membran (4) und die elektromagnetische Spule (3) einen Kompressionskammermotor bilden.
EP96401270A 1995-06-16 1996-06-12 Hochfrequenzlautsprecher Expired - Lifetime EP0749265B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9507198 1995-06-16
FR9507198A FR2735646B1 (fr) 1995-06-16 1995-06-16 Haut-parleur pour frequences elevees

Publications (2)

Publication Number Publication Date
EP0749265A1 EP0749265A1 (de) 1996-12-18
EP0749265B1 true EP0749265B1 (de) 2000-05-17

Family

ID=9480075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401270A Expired - Lifetime EP0749265B1 (de) 1995-06-16 1996-06-12 Hochfrequenzlautsprecher

Country Status (7)

Country Link
US (1) US5875252A (de)
EP (1) EP0749265B1 (de)
JP (1) JPH099390A (de)
AT (1) ATE193174T1 (de)
CA (1) CA2178532A1 (de)
DE (1) DE69608351T2 (de)
FR (1) FR2735646B1 (de)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0669405B2 (ja) * 1988-12-20 1994-09-07 吉田工業株式会社 ジグザグ型連続フアスナーエレメントの製造方法
US5878148A (en) * 1996-02-29 1999-03-02 Alexandrov; Svetlomir Compression driver
US6320970B1 (en) * 1998-09-25 2001-11-20 Eugene J. Czerwinski High frequency compression drivers
DE10008323A1 (de) * 1999-02-17 2000-08-31 Vifa Speak A S Videbaek Lautsprecher
US6466680B1 (en) * 1999-10-19 2002-10-15 Harman International Industries, Inc. High-frequency loudspeaker module for cinema screen
JP4582368B2 (ja) * 2000-06-05 2010-11-17 ソニー株式会社 スピーカ装置
ITBS20010073A1 (it) * 2001-10-03 2003-04-03 Outline Di Noselli G & C S N C Altoparlante a guida d'onda a dispersione controllata e regolabile
JP4445182B2 (ja) * 2002-03-29 2010-04-07 パイオニア株式会社 スピーカ装置
GB2388488B (en) * 2002-05-07 2005-07-27 Trevor William Stride A loudspeaker with an elliptical diaphragm
US20040066947A1 (en) * 2002-10-04 2004-04-08 Geddes Earl Rossell Transducer with multiple phase plugs
US20040159490A1 (en) * 2003-02-03 2004-08-19 Marlin Bruce E. Compact loudspeaker and control switch assembly and method for installing and adjusting a loudspeaker in a partition
GB2418097A (en) * 2004-09-09 2006-03-15 Anthony John Andrews Loudspeaker suspension element extends radially-inward to centre polepiece
US8470066B2 (en) * 2004-10-29 2013-06-25 Clarkson University Aqueous-based method for producing ultra-fine metal powders
JP2006333064A (ja) * 2005-05-26 2006-12-07 Pioneer Electronic Corp リング型スピーカ装置
CN101048014B (zh) * 2006-03-27 2011-04-27 顾康 一种高频扬声器
EP2474171B1 (de) * 2007-07-25 2014-11-19 Sinar Baja Electric Ltd. Ringförmige membran für einen elektroakustischen lautsprecher
GB2451259B (en) * 2007-07-25 2011-07-20 Gp Acoustics Loudspeaker
WO2009122573A1 (ja) * 2008-04-02 2009-10-08 パイオニア株式会社 スピーカ装置
FR2955444B1 (fr) 2010-01-15 2012-08-03 Phl Audio Systeme de haut-parleur coaxial a chambre de compression
FR2955445B1 (fr) 2010-01-15 2013-06-07 Phl Audio Transducteur electrodynamique a dome et suspension interne
FR2955446B1 (fr) * 2010-01-15 2015-06-05 Phl Audio Transducteur electrodynamique a dome et suspension flottante
US9014412B2 (en) 2010-07-09 2015-04-21 Aperion Audio, Inc. Loudspeaker that is axially stabilized out of the diaphragm suspension plane
US8428295B2 (en) 2010-07-09 2013-04-23 Aperion Audio, Inc. Loudspeaker that is axially stabilized out of the diaphragm suspension plane
DE102012102207B3 (de) * 2012-03-15 2013-08-29 BMS Speakers GmbH Ringmembran-Kompressionstreiber
US10327068B2 (en) * 2017-11-16 2019-06-18 Harman International Industries, Incorporated Compression driver with side-firing compression chamber
US10397694B1 (en) * 2018-04-02 2019-08-27 Sonos, Inc. Playback devices having waveguides

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400343A (en) * 1932-06-22 1933-10-26 Leonard Young Improvements in and relating to sound reproducing instruments
US2058208A (en) * 1935-12-21 1936-10-20 Bell Telephone Labor Inc Acoustic device
FR2518348B1 (fr) * 1981-12-16 1987-04-10 Guyot Michel Membrane de haut-parleur et procede pour sa fabrication
JP2647659B2 (ja) * 1987-08-29 1997-08-27 ソニー株式会社 音響材料
JPH01259698A (ja) * 1988-04-08 1989-10-17 Res Dev Corp Of Japan 振動板、電気音響変換器および振動板の製造方法
DE4031742A1 (de) * 1990-10-06 1992-04-09 Nokia Unterhaltungselektronik Kalotten-hochton-lautsprecher

Also Published As

Publication number Publication date
ATE193174T1 (de) 2000-06-15
US5875252A (en) 1999-02-23
EP0749265A1 (de) 1996-12-18
JPH099390A (ja) 1997-01-10
CA2178532A1 (fr) 1996-12-17
DE69608351T2 (de) 2001-01-04
FR2735646A1 (fr) 1996-12-20
DE69608351D1 (de) 2000-06-21
FR2735646B1 (fr) 1997-08-22

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