EP1414267A2 - Haut-parleur miniaturisé - Google Patents

Haut-parleur miniaturisé Download PDF

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Publication number
EP1414267A2
EP1414267A2 EP03450226A EP03450226A EP1414267A2 EP 1414267 A2 EP1414267 A2 EP 1414267A2 EP 03450226 A EP03450226 A EP 03450226A EP 03450226 A EP03450226 A EP 03450226A EP 1414267 A2 EP1414267 A2 EP 1414267A2
Authority
EP
European Patent Office
Prior art keywords
magnet system
membrane
loudspeaker
integrated circuit
front cover
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Withdrawn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
EP03450226A
Other languages
German (de)
English (en)
Other versions
EP1414267A3 (fr
Inventor
Thomas Dipl.-Ing. Gmeiner
Hannes Ing. Lehdorfer
Ernst Dipl.-Ing. Stöttinger
Johann Steiner
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.)
AKG Acoustics GmbH
Original Assignee
AKG Acoustics 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 AKG Acoustics GmbH filed Critical AKG Acoustics GmbH
Publication of EP1414267A2 publication Critical patent/EP1414267A2/fr
Publication of EP1414267A3 publication Critical patent/EP1414267A3/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Withdrawn legal-status Critical Current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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Definitions

  • the invention concerns miniaturized loudspeakers that operate according to the electrodynamic principle, especially for incorporation in small devices, such as telephones, mobile phones, hands-free devices, headphones, or the like, with a moving coil fastened to it, a membrane holder, a magnet system, and optionally a front cover and/or rear cover, as well as a digital amplifier.
  • Such loudspeakers consist of a magnet system and a membrane with a coil fastened to it, and a membrane holder that is fastened to fit the magnet system and that also positions the membrane with reference to the magnet system, along with a front cover and a rear cover.
  • the rear cover is necessarily provided and a plate carrying the amplifier, for thermal reasons, is fastened to the outside of the rear cover.
  • Loudspeakers in general, can be classified into different groups according to several criteria. An important division lies in the operating principle, where one distinguishes between electrodynamic and electrostatic loudspeakers. The latter are much more expensive, for various reasons, than loudspeakers operating according to the electrodynamic principle and are therefore only used in high-priced equipment.
  • Ordinary loudspeakers as generally used in hi-fi units, are passive, i.e., they are supplied via a cable with the signals to be converted to an intensity so that no additional amplification or power supply is required.
  • the employed amplifiers again can be classified, in principle, according to different criteria into analog and digital amplifiers, regardless of whether they are used in an active loudspeaker in its housing or whether a passive loudspeaker is arranged in its own housing.
  • An example of an extremely miniaturized loudspeaker can be gathered from US 5 001 762 A, which concerns a hearing aid that can be inserted into the ear: an electronic circuit is built onto a support plate, which contains a microphone and a loudspeaker. None is stated concerning the method of action, electrodynamic or electrostatic, or the design of the loudspeaker, nor is anything disclosed about the method of operation of the amplifier, analog or digital.
  • the invention concerns the use of digital amplifiers with electrodynamic, miniaturized loudspeakers in small devices, such as mobile telephones, headphones, hands-free devices and the like.
  • the objective of the invention is to devise a loudspeaker of the type just defined that is more simply designed than the loudspeakers of the prior art and, in this manner, permits miniaturization with simultaneous cost reduction.
  • the basic idea of the invention is to provide the amplifier within the volume formed by the front cover and the back cover, and therefore in the loudspeaker. If these covers, as is often the case in applications according to the invention, are missing and their function is taken over by other parts of the device, the amplifier according to the invention can be fastened to the magnet system or membrane holder.
  • a magnet system or membrane holder is not necessarily understood to mean components designed in one piece, but that these components can be constructed from several individual parts and, for example, can have inserts made of electrically conducting material in order to facilitate contacting of the coil.
  • modem digital amplifiers for loudspeakers of the areas of application are highly integrated and essentially consist of an integrated circuit and optionally a few additional components, their fastening on a suitable site directly on the loudspeaker is possible without major problems for one skilled in the art and having knowledge of the invention.
  • a generic small loudspeaker 1 consists of a magnet system 2, a membrane 3 with a coil 4 fastened to the membrane, and a membrane holder 5.
  • the feed line 6 for supplying coil 4 with current and a front cover 7 are also provided.
  • a connection opening 8 is shown purely schematically in membrane holder 5, through which the volume lying "behind" membrane 3 is connected to its surroundings, in order to achieve the desired characteristics of the loudspeaker 1.
  • a friction capstan or the like can naturally be provided in connection opening 8 or the opening can act as such, in order to achieve proper tuning.
  • FIG 2 in which the same components are designated with the same reference numbers as in Figure 1, shows a variant in which an amplifier 9 is arranged on the inside of a front cover 13.
  • the front cover has perforations 14 in order to permit the emergence sound from membrane 3.
  • the usual connection opening Figure 1 is not shown, but it can naturally be provided.
  • An internal electrical connection 15 from membrane 3 to circuit board 11 is shown for it.
  • Figure 3 shows a variant that is particularly favorable, when the miniature speaker 1 is to be fit into a larger insertion part and, for this purpose, the membrane holder 5 is provided with an enclosing ring 16.
  • the enclosing ring can be designed as a separate part or in one piece of the membrane holder.
  • the integrated circuit 10 of the amplifier optionally without a circuit board, can be arranged directly in a cavity or recess of the enclosing ring 16.
  • One or more protrusions protruding radially outward can be provided, instead of the enclosing ring, which serve for fastening of the loudspeaker; these can also be used to mount the amplifier.
  • the amplifier 9 can be arranged on the inside of this rear cover and therefore excellently protected against mechanical and electromechanical disturbances.
  • Production of the miniature loudspeaker according to the invention is no problem to one skilled in the field of electroacoustics and having knowledge of the invention; also, depending on the arrangement of the amplifier, the production method must be adapted to the corresponding parts and guiding of the lines considered during assembly.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Telephone Set Structure (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP03450226A 2002-10-22 2003-10-07 Haut-parleur miniaturisé Withdrawn EP1414267A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT16072002 2002-10-22
AT16072002 2002-10-22

Publications (2)

Publication Number Publication Date
EP1414267A2 true EP1414267A2 (fr) 2004-04-28
EP1414267A3 EP1414267A3 (fr) 2004-06-16

Family

ID=32046374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03450226A Withdrawn EP1414267A3 (fr) 2002-10-22 2003-10-07 Haut-parleur miniaturisé

Country Status (3)

Country Link
EP (1) EP1414267A3 (fr)
JP (1) JP2004147320A (fr)
KR (1) KR20040035556A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1805618B (zh) * 2005-12-29 2013-04-10 颜怀伟 移动电话用听筒免提双向扬声器及其功放与控制电路
CN104378722A (zh) * 2014-11-21 2015-02-25 音品电子（深圳）有限公司 一种超微型动圈式电声转换器
US9532145B2 (en) 2010-12-23 2016-12-27 Eagle Acoustics Manufacturing, Llc Low-profile speaker
EP4418686A1 (fr) * 2023-02-20 2024-08-21 Alps Alpine Co., Ltd. Haut-parleur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105100992B (zh) * 2015-07-20 2019-03-19 朝阳聚声泰（信丰）科技有限公司 一种高音质耳机喇叭
CN105072544B (zh) * 2015-07-20 2019-03-01 朝阳聚声泰（信丰）科技有限公司 一种消磁防尘的高音质手机喇叭

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499988A (en) * 1965-10-08 1970-03-10 Sanyo Electric Co Loudspeaker apparatus with audio frequency amplifier mounted thereon
GB2305809B (en) * 1995-09-28 1997-11-05 Harman Int Ind Power amplifier and loudspeaker frame integration
US6243472B1 (en) * 1997-09-17 2001-06-05 Frank Albert Bilan Fully integrated amplified loudspeaker

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1805618B (zh) * 2005-12-29 2013-04-10 颜怀伟 移动电话用听筒免提双向扬声器及其功放与控制电路
US9532145B2 (en) 2010-12-23 2016-12-27 Eagle Acoustics Manufacturing, Llc Low-profile speaker
CN104378722A (zh) * 2014-11-21 2015-02-25 音品电子（深圳）有限公司 一种超微型动圈式电声转换器
EP4418686A1 (fr) * 2023-02-20 2024-08-21 Alps Alpine Co., Ltd. Haut-parleur
US12581242B2 (en) 2023-02-20 2026-03-17 Alps Alpine Co., Ltd. Speaker

Also Published As

Publication number Publication date
KR20040035556A (ko) 2004-04-29
EP1414267A3 (fr) 2004-06-16
JP2004147320A (ja) 2004-05-20

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