EP0270981A2 - Haut-parleur - Google Patents

Haut-parleur Download PDF

Info

Publication number
EP0270981A2
EP0270981A2 EP87117747A EP87117747A EP0270981A2 EP 0270981 A2 EP0270981 A2 EP 0270981A2 EP 87117747 A EP87117747 A EP 87117747A EP 87117747 A EP87117747 A EP 87117747A EP 0270981 A2 EP0270981 A2 EP 0270981A2
Authority
EP
European Patent Office
Prior art keywords
membrane
centering
loudspeaker
loudspeaker according
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.)
Withdrawn
Application number
EP87117747A
Other languages
German (de)
English (en)
Other versions
EP0270981A3 (fr
Inventor
Karl-Heinz Dipl.-Phys. Thiele
Jürgen Ehmann
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.)
Elektrotechnik Ehmann GmbH
EWD Electronic-Werke Deutschland GmbH
Original Assignee
Elektrotechnik Ehmann GmbH
EWD Electronic-Werke Deutschland GmbH
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 Elektrotechnik Ehmann GmbH, EWD Electronic-Werke Deutschland GmbH filed Critical Elektrotechnik Ehmann GmbH
Publication of EP0270981A2 publication Critical patent/EP0270981A2/fr
Publication of EP0270981A3 publication Critical patent/EP0270981A3/fr
Withdrawn legal-status Critical Current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
    • H04R9/04—Construction, mounting, or centering of coil
    • 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
    • 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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting

Definitions

  • the invention relates to a loudspeaker according to the preamble of patent claim 1.
  • Cone loudspeakers are generally used for the acoustic reproduction of low frequencies. Since a spherical radiation pattern is generally desired, a cone loudspeaker can only be used up to an audio frequency whose wavelength corresponds approximately to that of the circumference of the loudspeaker. Tone frequencies with a shorter wavelength produce a directional sound field. To avoid such a directivity, higher frequencies are attenuated by means of a crossover. Crossovers result in a higher distortion factor.
  • the invention has for its object to provide a loudspeaker with a directional effect that is not too large and does not require a crossover.
  • a light, but inherently stable loudspeaker membrane which is rigidly coupled to the voice coil, is a prerequisite for faithful reproduction of the input signal.
  • the principle of the invention is that the voice coil is not rigidly connected to the membrane, but is connected via a resilient part. This gives the speaker the function of a mechanical low pass.
  • the limit frequency of this speaker can be determined by the elasticity and shape of the resilient part.
  • a membrane 1 is connected via a centering membrane 2 to the loudspeaker frame 6 and via a resilient part 3 to a voice coil former 4.
  • a voice coil 5 is attached to the carrier 4.
  • the resilient part 3 is part of the centering membrane 2.
  • the membrane 1 is connected to the centering membrane 2 along a connecting line 7 which is closer to the inner edge than to the outer edge of the centering membrane 2.
  • the membrane 1 can also be designed as a flat disk or as a spherical shell section.
  • the centering membrane 2 is fixedly mounted with its end facing away from the voice coil support 4, ie connected to the loudspeaker basket 6 enclosing the membrane 1.
  • a dust protection cap 8 prevents the voice coil bobbin 4 from being blocked by foreign bodies in the air gap of the magnet system and at the same time prevents partial vibrations of the membrane.
  • Fig. 2 shows a modification of the loudspeaker according to Fig. 1.
  • the low-pass effect is achieved in that the centering membrane 2 is not connected to the end of the voice coil bobbin 4, but to a point between the two ends, that is, a tap of the voice coil bobbin 4 and also the front end of the voice coil former 4 is connected to the membrane 1 via the resilient part 3.
  • the part 3 has a similar effect to the corresponding part 3 in FIG. 1.
  • the material of the part 3 is the same as that of the centering membrane 2, preferably an impregnated textile fabric. Such a fabric has the advantage that it allows precise movements in the axial direction and at the same time enables precise centering for all axial movements.
  • Part 3 consists of an impregnated fabric, because the impregnation ensures the hardness of the fabric and the durability of the waveform (sinus, saw or trapezoidal shape) imprinted on the fabric.
  • FIG. 3 shows a loudspeaker in which the membrane 1 is connected to the voice coil former 4 via a foam body 3.
  • the foam body 3 on the one hand, supports the membrane 1 and, on the other hand, is glued to the voice coil former 4 in the plane of the centering membrane 2 via the inner part of the centering membrane 2.
  • the foam body 3 can be made airtight so that it also replaces the dust protection cap 8.
  • FIG. 4 shows a frequency characteristic for one of the loudspeakers shown in FIGS. 1 to 3.
  • the curve (A) shows a loudspeaker without the resilient part 3.
  • the curve (B) shows the characteristics of a loudspeaker with a resilient part 3. The reduction in the amplitude for higher frequencies from 600 Hz, that is to say the desired low-pass effect, is clearly recognizable.
  • FIG. 5 shows a further development of the invention.
  • the front end of the voice coil bobbin 4, ie facing the membrane 1 is connected to the membrane 1 via the first centering membrane 2a.
  • centering membrane 2a and membrane 1 are made from one part, that is to say consist of a homogeneous material throughout. Only the thickness of the centering membrane 2a is approximately less than the thickness of the deep-drawn membrane 1, due to the production of the meandering shape of the centering membrane 2a.
  • the first centering membrane 2a and the membrane 1 are thus produced by the same tool, which thus simultaneously produces the conical membrane 1 and the centering membrane 2a, which is directly homogeneously connected to it, from a sheet-like material, each with the desired shape.
  • the voice coil support 4 is connected via the second centering membrane 2b to a stationary point, namely the speaker cage 6.
  • the membrane 1 is a plastic or plastic membrane.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
EP87117747A 1986-12-06 1987-12-01 Haut-parleur Withdrawn EP0270981A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863641760 DE3641760A1 (de) 1986-12-06 1986-12-06 Lautsprecher
DE3641760 1986-12-06

Publications (2)

Publication Number Publication Date
EP0270981A2 true EP0270981A2 (fr) 1988-06-15
EP0270981A3 EP0270981A3 (fr) 1990-05-16

Family

ID=6315632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117747A Withdrawn EP0270981A3 (fr) 1986-12-06 1987-12-01 Haut-parleur

Country Status (4)

Country Link
EP (1) EP0270981A3 (fr)
JP (1) JPS63156500A (fr)
KR (1) KR910001433B1 (fr)
DE (1) DE3641760A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0642291A2 (fr) * 1993-08-05 1995-03-08 Bose Corporation Fixation de membrane pour haut-parleur
DE4419249A1 (de) * 1994-06-01 1995-12-07 Nokia Deutschland Gmbh Lautsprecher
EP0778721A2 (fr) * 1995-12-06 1997-06-11 Pioneer Electronic Corporation Mécanisme d'amortissement pour des membranes de haut-parleurs
GB2516936A (en) * 2013-08-07 2015-02-11 Monitor Audio Ltd Loudspeaker driver

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2012520A (en) * 1978-01-12 1979-07-25 Peerless Gmbh Loudspeaker
EP0030758A1 (fr) * 1979-12-11 1981-06-24 Koninklijke Philips Electronics N.V. Transducteur élkectrodynamique avec un filtre mécanique
EP0039740A1 (fr) * 1979-11-09 1981-11-18 Matsushita Electric Industrial Co., Ltd. Haut-parleur
EP0193886A2 (fr) * 1985-03-05 1986-09-10 Nokia Unterhaltungselektronik (Deutschland) GmbH Membrane pour haut-parleur plan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2012520A (en) * 1978-01-12 1979-07-25 Peerless Gmbh Loudspeaker
EP0039740A1 (fr) * 1979-11-09 1981-11-18 Matsushita Electric Industrial Co., Ltd. Haut-parleur
EP0030758A1 (fr) * 1979-12-11 1981-06-24 Koninklijke Philips Electronics N.V. Transducteur élkectrodynamique avec un filtre mécanique
EP0193886A2 (fr) * 1985-03-05 1986-09-10 Nokia Unterhaltungselektronik (Deutschland) GmbH Membrane pour haut-parleur plan

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0642291A2 (fr) * 1993-08-05 1995-03-08 Bose Corporation Fixation de membrane pour haut-parleur
EP0642291A3 (fr) * 1993-08-05 1996-01-31 Bose Corp Fixation de membrane pour haut-parleur.
DE4419249A1 (de) * 1994-06-01 1995-12-07 Nokia Deutschland Gmbh Lautsprecher
EP0685980A3 (fr) * 1994-06-01 1996-09-18 Nokia Technology Gmbh Haut-parleur.
US5581624A (en) * 1994-06-01 1996-12-03 Nokia Technology Gmbh Loudspeaker suitable for high-temperature use having a non-adhesive connection between the voice coil support and the loudspeaker diaphragm
EP0778721A2 (fr) * 1995-12-06 1997-06-11 Pioneer Electronic Corporation Mécanisme d'amortissement pour des membranes de haut-parleurs
EP0778721A3 (fr) * 1995-12-06 2006-03-29 Pioneer Electronic Corporation Mécanisme d'amortissement pour des membranes de haut-parleurs
GB2516936A (en) * 2013-08-07 2015-02-11 Monitor Audio Ltd Loudspeaker driver

Also Published As

Publication number Publication date
KR880008684A (ko) 1988-08-31
JPS63156500A (ja) 1988-06-29
EP0270981A3 (fr) 1990-05-16
DE3641760A1 (de) 1988-06-16
KR910001433B1 (en) 1991-03-05

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Inventor name: THIELE, KARL-HEINZ, DIPL.-PHYS.

Inventor name: EHMANN, JUERGEN