EP0624049A2 - Appareil haut-parleur - Google Patents

Appareil haut-parleur Download PDF

Info

Publication number
EP0624049A2
EP0624049A2 EP94106578A EP94106578A EP0624049A2 EP 0624049 A2 EP0624049 A2 EP 0624049A2 EP 94106578 A EP94106578 A EP 94106578A EP 94106578 A EP94106578 A EP 94106578A EP 0624049 A2 EP0624049 A2 EP 0624049A2
Authority
EP
European Patent Office
Prior art keywords
yoke
magnet
loudspeaker
diaphragm
voice coil
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.)
Granted
Application number
EP94106578A
Other languages
German (de)
English (en)
Other versions
EP0624049A3 (fr
EP0624049B1 (fr
Inventor
Keiji Ishikawa
Kiyoshi Yamagishi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 JP10230893A external-priority patent/JP3203876B2/ja
Priority claimed from JP13449393A external-priority patent/JP3218804B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0624049A2 publication Critical patent/EP0624049A2/fr
Publication of EP0624049A3 publication Critical patent/EP0624049A3/fr
Application granted granted Critical
Publication of EP0624049B1 publication Critical patent/EP0624049B1/fr
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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • 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
    • H04R9/02—Details
    • H04R9/022—Cooling arrangements
    • 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

Definitions

  • the present invention relates to a loudspeaker apparatus for use in various audio devices, and particularly to a thin, compact, and high-performance loudspeaker apparatus.
  • Figure 1 shows a cross section of an exemplary configuration for a conventional loudspeaker. Since the loudspeaker is symmetrical about the central axis thereof, only a half portion of the cross section is shown in Figure 1 (referred to as a half cross section hereinafter).
  • a magnet ring 2 is disposed on a saucer-shaped lower plate 1 .
  • the lower plate 1 has a center pole 1a .
  • a ring-shaped upper plate 3 is disposed on the magnet 2 .
  • a gap 4 is formed between the center pole 1a and the upper plate 3 .
  • a bowl-shaped frame 5 is attached on the upper face of the upper plate 3 .
  • the outer periphery of a diaphragm 8 is attached to the circular peripheral portion of the frame 5 with an edge 7 interposed therebetween.
  • the edge 7 is fixed onto the circular peripheral portion of the frame 5 by means of a gasket 6 .
  • a voice coil 9 is inserted into the gap 4 without being off-centered.
  • the voice coil 9 is connected with the inner periphery of the diaphragm 8 , and is supported by the frame 5 through a suspension 10 interposed therebetween, the suspension 10 being disposed in the vicinity of the middle portion of the voice coil 9 .
  • a dome-shaped dust cover 11 is attached onto the upper surface of a central portion of the diaphragm 8 so as to prevent dust from entering the interior of the loudspeaker.
  • Miniaturization and reduction in thickness of a conventional loudspeaker as shown in Figure 1 have been realized mainly by miniaturizing and reducing the thickness of each component element.
  • a magnet cylinder 22 is attached on a lower plate 21 .
  • a saucer-shaped upper plate 23 is further attached on the magnet 22 .
  • the peripheral portion 21a of the lower plate 21 is formed so as to oppose the upper plate 23 with a gap 24 interposed therebetween.
  • This exemplary loudspeaker is similar to the loudspeaker shown in Figure 1 in that the lower plate 21 , the magnet 22 , and the upper plate 23 constitute a magnetic circuit 32 including the gap 24 .
  • a saucer-shaped frame 25 is attached onto the lower face of the lower plate 21 .
  • the peripheral portion of the frame 25 is so formed as to receive a gasket 26 .
  • the outer periphery of a diaphragm 28 is attached to the peripheral portion of the frame 25 by means of an edge 27 which in turn is fixed with the gasket 26 .
  • the inner periphery of the diaphragm 28 is connected with a voice coil 29 .
  • the voice coil 29 is inserted without being off-centered into the gap 24 formed between the lower plate 21 and the upper plate 23 .
  • the diaphragm 28 is supported by the gasket 26 with a suspension 30 interposed therebetween.
  • a dust cover 31 is formed so as to cover the upper plate 23 .
  • the loudspeaker shown in Figure 2 has a basic structure similar to that of the loudspeaker shown in Figure 1 , but has a reduced thickness by accommodating the magnetic circuit 32 under the diaphragm 28 .
  • Figure 3 shows a half cross section of an exemplary configuration for a conventional loudspeaker which has an improved configuration as compared with the loudspeaker shown in Figure 1 so as to achieve miniaturization and high performance.
  • This loudspeaker incorporates a pot-shaped yoke 35 having an outer peripheral wall 35a , instead of the upper and lower plates used in the loudspeakers shown in Figures 1 and 2 .
  • An inner peripheral wall 35b which is disposed concentrically with the outer peripheral wall 35a , is formed in the yoke 35 .
  • a magnet ring 36 In the vicinity of the inner-upper end of the outer peripheral wall 35a of the yoke 35 is attached a magnet ring 36 .
  • the magnet 36 may be a magnet which is, for example, composed of rare earth elements and is polarized in a radial direction
  • a voice coil 9 is inserted into a gap 4 formed between the magnet 36 and the inner peripheral wall 35b .
  • the yoke 35 , the magnet 36 , and the gap 4 constitute a magnetic circuit 37 .
  • a high-performance loudspeaker such as shown in Figure 3 is likely to receive large input signals in actual use, so that the temperature of the voice coil 9 increases even more drastically.
  • the heat generated by the temperature increase of the voice coil 9 is dissipated through the yoke 35 and/or the magnet 36 in the magnetic circuit 37 .
  • the yoke 35 and the magnet 36 are miniaturized as a whole, thus such a heat dissipation is restrained.
  • the voice coil 9 may be broken down due to the increase in the temperature thereof.
  • the magnet is a magnet ring which is polarized in a radial direction.
  • the magnet is selected from a group consisting of a samarium-cobalt magnet, a cerium-cobalt magnet and a neodymium magnet.
  • the invention described herein makes possible the advantages of (1) providing a compact, thin, and yet high-performance loudspeaker apparatus capable of high-quality reproduction of an audio signal, and (2) a highly reliable loudspeaker apparatus having stable performance properties in which even when large input signals are continuously supplied thereto, any extraordinary increase in temperature of the voice coil is restrained.
  • Figure 2 shows a half cross section of another exemplary configuration for a conventional loudspeaker.
  • Figure 6 is a perspective view of the loudspeaker in the second example of the present invention.
  • Figure 9 shows a half cross section of a configuration for a loudspeaker in accordance with a fourth example of the present invention.
  • Figure 10 is a graph which illustrates the exemplary frequency characteristic of the loudspeaker in accordance with the fourth example of the present invention.
  • a frame 42 so configurated as to surround the center pole 41a is attached to the supporter 41 .
  • the frame 42 should preferably have the same properties as the supporter 41 . It is possible to integrally form the supporter 41 and the frame 42 when both are designed so as to be formed of the same material. This will make it possible to reduce the number of the component elements and fabrication steps of the loudspeaker, so that the fabrication process becomes more efficient and that the fabrication cost decreases. For example, it is preferable to integrally form the supporter 41 and the frame 42 by an aluminum die-casting method.
  • the center pole 41a and the centering pin 43 may have any shape, e.g. a prism, a column, and a cylinder having a hollow portion.
  • column shapes are preferable because they are easily fabricated and dissipate heat efficiently.
  • a plurality of heat-dissipating fins may be integrally formed on the outside of the yoke 96 , as in the case of the loudspeaker of Example 3. In that case, it becomes possible to reduce the number of component elements and fabrication steps of the loudspeaker, so that the fabrication process becomes more efficient and the fabrication cost decreases, as in Example 3.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
EP19940106578 1993-04-28 1994-04-27 Appareil haut-parleur Expired - Lifetime EP0624049B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP102308/93 1993-04-28
JP10230893 1993-04-28
JP10230893A JP3203876B2 (ja) 1993-04-28 1993-04-28 スピーカ
JP13449393A JP3218804B2 (ja) 1993-06-04 1993-06-04 スピーカ
JP134493/93 1993-06-04
JP13449393 1993-06-04

Publications (3)

Publication Number Publication Date
EP0624049A2 true EP0624049A2 (fr) 1994-11-09
EP0624049A3 EP0624049A3 (fr) 1995-03-08
EP0624049B1 EP0624049B1 (fr) 2002-06-12

Family

ID=26443024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940106578 Expired - Lifetime EP0624049B1 (fr) 1993-04-28 1994-04-27 Appareil haut-parleur

Country Status (2)

Country Link
EP (1) EP0624049B1 (fr)
DE (1) DE69430776T2 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729617A (en) * 1995-07-27 1998-03-17 Nokia Technology Gmbh Magnet system
GB2360899A (en) * 1999-12-17 2001-10-03 Goodmans Loudspeakers Ltd Coaxial loudspeaker with the magnetic circuit mounted in front of the diaphragm
GB2375456A (en) * 2001-02-20 2002-11-13 Kh Technology Corp Heat dissipating loudspeaker pole piece
GB2404520A (en) * 2003-07-28 2005-02-02 Turbosound Ltd Phase plug equalizer used as heat sink for loudspeaker
US7016514B2 (en) 2001-02-03 2006-03-21 Kh Technology Corporation Loudspeaker assembly
US7426283B2 (en) * 2004-08-19 2008-09-16 Pioneer Corporation Speaker device and heat-dissipating member
US8989429B2 (en) 2010-01-15 2015-03-24 Phl Audio Electrodynamic transducer having a dome and a buoyant hanging part
US9042594B2 (en) 2010-01-15 2015-05-26 Phl Audio Electrodynamic transducer having a dome and an inner hanging part
US9084056B2 (en) 2010-01-15 2015-07-14 Phl Audio Coaxial speaker system having a compression chamber with a horn
US9445201B2 (en) 2013-11-21 2016-09-13 Harman International Industries, Inc. Inverted dual coil transducer
WO2016135517A3 (fr) * 2015-02-27 2016-11-24 Native Design Limited Dispositif combiné de pilote de haut-parleur et de lumière
WO2019121072A1 (fr) * 2017-12-19 2019-06-27 Pss Belgium Nv Haut-parleur
WO2020239766A1 (fr) * 2019-05-29 2020-12-03 Pss Belgium Nv Haut-parleur

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763334A (en) * 1972-01-21 1973-10-02 Gen Electric Magnet assembly
DE3007991A1 (de) * 1980-03-01 1981-09-17 Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim Elektroakustischer wandler
US4327257A (en) * 1979-09-10 1982-04-27 Schwartz Leslie H Alignment device for electro-acoustical transducers
US4379951A (en) * 1977-04-20 1983-04-12 Gabr Saad Z M Electro-acoustic transducer means
DE3638693A1 (de) * 1985-11-15 1987-05-21 Bose Corp Kompakter elektro-akustischer uebertrager
US4933975A (en) * 1988-05-19 1990-06-12 Electro-Voice, Inc. Dynamic loudspeaker for producing high audio power
FR2667212A1 (fr) * 1990-09-25 1992-03-27 Phl Audio Transducteur electroacoustique de puissance.
DE4126121A1 (de) * 1991-08-07 1993-02-11 Mac Audio Electronic Gmbh Dynamischer lautsprecher
WO1993003586A1 (fr) * 1991-08-05 1993-02-18 Aura Systems, Inc. Organe de commande de bobine mobile de haut-parleur

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763334A (en) * 1972-01-21 1973-10-02 Gen Electric Magnet assembly
US4379951A (en) * 1977-04-20 1983-04-12 Gabr Saad Z M Electro-acoustic transducer means
US4327257A (en) * 1979-09-10 1982-04-27 Schwartz Leslie H Alignment device for electro-acoustical transducers
DE3007991A1 (de) * 1980-03-01 1981-09-17 Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim Elektroakustischer wandler
DE3638693A1 (de) * 1985-11-15 1987-05-21 Bose Corp Kompakter elektro-akustischer uebertrager
US4933975A (en) * 1988-05-19 1990-06-12 Electro-Voice, Inc. Dynamic loudspeaker for producing high audio power
FR2667212A1 (fr) * 1990-09-25 1992-03-27 Phl Audio Transducteur electroacoustique de puissance.
WO1993003586A1 (fr) * 1991-08-05 1993-02-18 Aura Systems, Inc. Organe de commande de bobine mobile de haut-parleur
DE4126121A1 (de) * 1991-08-07 1993-02-11 Mac Audio Electronic Gmbh Dynamischer lautsprecher

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729617A (en) * 1995-07-27 1998-03-17 Nokia Technology Gmbh Magnet system
GB2360899A (en) * 1999-12-17 2001-10-03 Goodmans Loudspeakers Ltd Coaxial loudspeaker with the magnetic circuit mounted in front of the diaphragm
GB2360899B (en) * 1999-12-17 2002-03-27 Goodmans Loudspeakers Ltd Coaxial speaker
US7016514B2 (en) 2001-02-03 2006-03-21 Kh Technology Corporation Loudspeaker assembly
GB2375456A (en) * 2001-02-20 2002-11-13 Kh Technology Corp Heat dissipating loudspeaker pole piece
GB2375456B (en) * 2001-02-20 2004-08-11 Kh Technology Corp Loudspeaker pole piece and loudspeaker assembly
GB2404520A (en) * 2003-07-28 2005-02-02 Turbosound Ltd Phase plug equalizer used as heat sink for loudspeaker
US7426283B2 (en) * 2004-08-19 2008-09-16 Pioneer Corporation Speaker device and heat-dissipating member
US9084056B2 (en) 2010-01-15 2015-07-14 Phl Audio Coaxial speaker system having a compression chamber with a horn
US9042594B2 (en) 2010-01-15 2015-05-26 Phl Audio Electrodynamic transducer having a dome and an inner hanging part
US8989429B2 (en) 2010-01-15 2015-03-24 Phl Audio Electrodynamic transducer having a dome and a buoyant hanging part
US9232301B2 (en) 2010-01-15 2016-01-05 Phl Audio Coaxial speaker system having a compression chamber
US9445201B2 (en) 2013-11-21 2016-09-13 Harman International Industries, Inc. Inverted dual coil transducer
WO2016135517A3 (fr) * 2015-02-27 2016-11-24 Native Design Limited Dispositif combiné de pilote de haut-parleur et de lumière
US10219061B2 (en) 2015-02-27 2019-02-26 Native Design Limited Light and loudspeaker driver device
EP3641331A1 (fr) * 2015-02-27 2020-04-22 Zuma Array Limited Dispositif combiné de moteur de haut-parleur et de lumière
US10924832B2 (en) 2015-02-27 2021-02-16 Zuma Array Limited Light and loudspeaker driver device
WO2019121072A1 (fr) * 2017-12-19 2019-06-27 Pss Belgium Nv Haut-parleur
WO2020239766A1 (fr) * 2019-05-29 2020-12-03 Pss Belgium Nv Haut-parleur
CN113906767A (zh) * 2019-05-29 2022-01-07 Pss比利时股份有限公司 扬声器
US11924621B2 (en) 2019-05-29 2024-03-05 Pss Belgium Nv Loudspeaker

Also Published As

Publication number Publication date
DE69430776D1 (de) 2002-07-18
DE69430776T2 (de) 2003-03-27
EP0624049A3 (fr) 1995-03-08
EP0624049B1 (fr) 2002-06-12

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