EP0471990A2 - Haut-parleur à double bobine - Google Patents

Haut-parleur à double bobine Download PDF

Info

Publication number
EP0471990A2
EP0471990A2 EP91112202A EP91112202A EP0471990A2 EP 0471990 A2 EP0471990 A2 EP 0471990A2 EP 91112202 A EP91112202 A EP 91112202A EP 91112202 A EP91112202 A EP 91112202A EP 0471990 A2 EP0471990 A2 EP 0471990A2
Authority
EP
European Patent Office
Prior art keywords
winding
pole plate
voice coil
membrane
basket
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
EP91112202A
Other languages
German (de)
English (en)
Other versions
EP0471990B1 (fr
EP0471990A3 (en
Inventor
Jörg Prokisch
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.)
Nokia Deutschland GmbH
Original Assignee
Nokia Unterhaltungselektronik Deutschland GmbH
Nokia 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 Nokia Unterhaltungselektronik Deutschland GmbH, Nokia Deutschland GmbH filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0471990A2 publication Critical patent/EP0471990A2/fr
Publication of EP0471990A3 publication Critical patent/EP0471990A3/de
Application granted granted Critical
Publication of EP0471990B1 publication Critical patent/EP0471990B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges

Definitions

  • the invention relates to a double coil loudspeaker, in which each of the two voice coils is acted upon by audio signals from different signal sources.
  • loudspeakers which differ from conventionally known dynamic cone loudspeakers, for example illustrated in Funkschau 1983, No. 7, page 99, FIG. 1, only by a modified voice coil design, which is explained in more detail below, are used above all where there is space constraint To transmit sound signals from two different signal sources using only one membrane.
  • this double-coil loudspeaker has two coil-shaped winding assemblies on the voice coil support, with one turn of the other winding assembly being arranged next to each turn of the first winding assembly. If the winding formations are laid around the voice coil carrier in multiple layers, this does not change the arrangement of the turns of the two winding formations described above in relation to one another in the respective positions. Only the individual windings of a lower layer are covered by windings in the layer above, which each belong to a different winding structure. The turns of all winding formations usually have the same wire cross-section.
  • the effective conductor length of the two winding assemblies is adapted to the thickness of the pole plate adjacent to the winding assemblies or the thickness of this pole plate is adapted to the effective conductor lengths for the frequency spectra to be transmitted.
  • the effective conductor length is understood to mean the longitudinal extent of the winding formations on the voice coil former parallel to the central axis of the loudspeaker. According to this explanation, it is also understandable in itself why the sound reproduction quality is reduced compared to single-coil loudspeakers when the two winding groups are subjected to sound signals of different frequency spectra.
  • the well-known winding design with adjacent Windings of different winding connections have the effect that only one winding group can be optimally designed with regard to the effective conductor length for the frequency spectrum to be transmitted. But the winding bandage, whose effective conductor length is optimized, is still no guarantee of good sound reproduction behavior. This is because, due to the known arrangement of the winding associations on the voice coil former, the non-optimized winding association counteracts the optimized winding association with an increased ballast weight compared to a single-coil loudspeaker.
  • the invention is therefore based on the object of specifying a double-coil loudspeaker whose sound reproduction quality is improved when sound signals of different frequency spectra are applied to the two winding groups.
  • first winding assembly is arranged in one or more layers one above the other on the outer surface of the voice coil former, that around the first winding assembly on part of its surface, preferably in the area which is adjacent to the first pole plate when the system is at rest , the second wrap is placed and that the longitudinal and transverse dimensions of the second wrap are reduced compared to the longitudinal and transverse dimensions of the first wrap.
  • the effective conductor lengths of the two winding groups can be adapted to the frequency spectra to be transmitted as well as the Select the impedances of the two coils independently of one another.
  • an advantageous embodiment of the invention is specified in claim 2. If the first winding bandage is then designed for the reproduction of the low or broadband sound spectrum and the second winding bandage is designed exclusively for speech reproduction, this has the advantage that the second winding bandage can be kept very narrow because of the low amplitude during speech reproduction. Since the second winding bandage also allows the use of very thin wire cross sections due to its narrow design, the effective conductor length for this winding area can also be regarded as optimized. Due to the reduced geometric dimensions of the second winding area intended for speech reproduction and its reduced weight as a result, the sound reproduction in the low-range or broadband range which is effected by means of the first winding area is not influenced. In particular, the sound reproduction quality in the low and broadband range is comparable to the reproduction quality of a single-coil loudspeaker, while the sound quality in speech reproduction achieves an optimum that can be achieved with a double-coil loudspeaker.
  • the double-coil loudspeaker specified in claim 2 in motor vehicles which have a car telephone system with hands-free function, since the double-coil loudspeaker according to the invention with its first winding assembly as a loudspeaker for the audio system of the motor vehicle and with its second winding assembly as a loudspeaker for the speech reproduction of the Handsfree phone can be used.
  • the double-coil loudspeaker according to the invention with its first winding assembly as a loudspeaker for the audio system of the motor vehicle and with its second winding assembly as a loudspeaker for the speech reproduction of the Handsfree phone can be used.
  • there is also no switchover unit which is necessary if how traditionally the cone speakers of the audio system simultaneously take over the sound reproduction of the telephone.
  • the conventionally designed double-coil loudspeaker illustrated in FIG. 1 has a conical basket 10 in which the cone-shaped membrane 11 is inserted.
  • the membrane 11 and the basket 10 are connected to one another at their ends, each of which has the larger diameter.
  • the end of the membrane 11, which has the smaller diameter, is covered by a hemispherical dust cap 12 pointing towards the other end of the membrane 11.
  • annular permanent magnet 13 is attached centrally to the central axis of the loudspeaker, with another between the end of the basket 10 and the permanent magnet 13 is also annular, but has a smaller inner diameter than the permanent magnet 13 pole plate 14 is interposed.
  • the other annular surface of the permanent magnet 13 facing away from the basket 10 is covered with a disk-shaped second pole plate 15.
  • a tubular voice coil former 17 is attached to the end of the membrane 11, which has the smaller diameter.
  • a concertina-shaped centering membrane 18 is arranged between the inner surface of the basket 10 and the end of the voice coil bobbin 17, which faces the membrane 11. This ensures during operation of the loudspeaker that the voice coil bobbin 17 is always centered on the central axis of the loudspeaker.
  • each turn 22 of a first winding assembly 20 is a turn 22 in the vertical extent subordinate to the other winding association 21.
  • This arrangement of the turns 22 with respect to one another also applies in a horizontal extension if, as shown in FIG. 1, the winding assemblies 20, 21 are laid in multiple layers around the voice coil former 17.
  • the cross section of the winding wire is the same for both winding groups 20, 21.
  • the longitudinal extent of the winding formations 20, 21 on the voice coil bobbin 17 is selected so that the idle state of the loudspeaker means that the winding formations 20, 21 are approximately in the middle of the first pole plate 14 located next to it on the inside.
  • the ends 23 of the winding wire of each winding assembly 20, 21 are guided to the connecting terminals 24, 25 arranged on the basket 10.
  • FIG. 2 A double coil loudspeaker designed according to the invention is illustrated in FIG. 2. This differs from the double coil loudspeaker described in FIG. 1 by a different arrangement of the winding formations 20, 21 on the voice coil former 17.
  • a first winding assembly 20 is placed in multiple layers around the outer jacket 19 of the voice coil bobbin 17.
  • the second winding bandage 21 is also placed in multiple layers on this winding bandage 20.
  • this winding assembly 21 is distinguished by a reduced wire cross section and a reduced winding width in the longitudinal direction of the voice coil bobbin 17.
  • the longitudinal dimensions of both winding assemblies 20, 21 also protrude here, the first pole plate 14 arranged next to them at the same distance.
  • each winding assembly 20, 21 can be adapted to the frequency spectrum to be transmitted in each case. If the second winding bandage 21 is designed for the voice reproduction of a telephone, this winding bandage 21, because of its light weight, has no influence on the reproduction quality of the other winding bandage 20 designed for a different frequency spectrum.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP91112202A 1990-08-13 1991-07-20 Haut-parleur à double bobine Expired - Lifetime EP0471990B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025591A DE4025591A1 (de) 1990-08-13 1990-08-13 Doppelspulenlautsprecher
DE4025591 1990-08-13

Publications (3)

Publication Number Publication Date
EP0471990A2 true EP0471990A2 (fr) 1992-02-26
EP0471990A3 EP0471990A3 (en) 1992-08-19
EP0471990B1 EP0471990B1 (fr) 1995-04-19

Family

ID=6412140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112202A Expired - Lifetime EP0471990B1 (fr) 1990-08-13 1991-07-20 Haut-parleur à double bobine

Country Status (3)

Country Link
EP (1) EP0471990B1 (fr)
JP (1) JPH04234300A (fr)
DE (2) DE4025591A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807262A1 (fr) * 2000-04-03 2001-10-05 Sagem Telephone mobile avec haut-parleur perfectionne
US9838794B2 (en) 2013-04-26 2017-12-05 Sound Solutions International Co., Ltd. Double coil speaker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953119C2 (de) * 1999-11-04 2003-03-20 Harman Audio Electronic Sys Audioverstärker mit einer getakteten Endstufe
KR20060102199A (ko) * 2005-03-23 2006-09-27 주식회사 청음전자 스피커

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6609729A (fr) * 1965-07-16 1967-01-17
US4088847A (en) * 1975-12-11 1978-05-09 Matsushita Electric Industrial Co., Ltd. Speaker voice coil construction
DE3208409A1 (de) * 1982-03-09 1983-09-15 Hagenuk GmbH, 2300 Kiel Dynamischer schallwandler
US4897877A (en) * 1987-05-18 1990-01-30 Oxford Speaker Company Sub-woofer driver combination with dual voice coil arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807262A1 (fr) * 2000-04-03 2001-10-05 Sagem Telephone mobile avec haut-parleur perfectionne
EP1146771A1 (fr) * 2000-04-03 2001-10-17 Sagem Sa Téléphone mobile avec haut-parleur perfectionné
US9838794B2 (en) 2013-04-26 2017-12-05 Sound Solutions International Co., Ltd. Double coil speaker

Also Published As

Publication number Publication date
EP0471990B1 (fr) 1995-04-19
EP0471990A3 (en) 1992-08-19
JPH04234300A (ja) 1992-08-21
DE4025591A1 (de) 1992-02-20
DE59105234D1 (de) 1995-05-24

Similar Documents

Publication Publication Date Title
DE102014103324B4 (de) Induktives Bauelement und Verfahren zum Herstellen eines induktiven Bauelements
DE19654156C2 (de) Lautsprechereinheit und die Lautsprechereinheit verwendendes Lautsprechersystem
DE4317775A1 (de) Lautsprecher
EP0804048B1 (fr) Haut-parleur
DE2533163B2 (de) Elektrischer Aufnehmer für ein Saiteninstrument, wie beispielsweise eine Gitarre
AT143569B (de) Akustischer Apparat.
DE69112473T2 (de) Lautsprecheranordnung und TV mit solcher Anordnung.
DE10322692A1 (de) Elektroakustischer Wandler
EP0471990B1 (fr) Haut-parleur à double bobine
WO2001026412A2 (fr) Haut-parleur multiple
DE2161620B2 (de) Richtungsabhaengiger breitbanduebertrager in gabelschaltung
DE2362001A1 (de) Dynamischer lautsprecher mit schwingspule
DE2602668C3 (de) Hochspannungsfester breitbandiger Übertrager für die Nachrichtentechnik
DE102019120137B3 (de) Elektrodynamischer Lautsprecher
EP0582120A1 (fr) Dispositif des haut-parleurs coaxials
DE2637604B2 (de) Verteilte Verzögerungsleitung
DE3831376A1 (de) Lautsprecher oder mikrofon
DE4225854A1 (de) Mittel-/Tiefton-Lautsprecher
DE19637847A1 (de) Elektro - akustische Wandler
DE3223817C2 (fr)
DE1928118A1 (de) Vorrichtung zur Ton-Wiedergabe
DE3918654C2 (fr)
DE202019106955U1 (de) Kalottenmembran, ausgeglichene Kalottenmembran und Lautsprecher
DE502180C (de) Verfahren zur drahtlosen Fernuebertragung von niederfrequenten Wellen (von Hoerfrequenz oder Bildfrequenz) mit Hilfe hochfrequenter Traegerwellen
DE3633156A1 (de) Schaltungsanordnung zur klangverbesserung von lautsprechern

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE DE FR GB IT SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NOKIA (DEUTSCHLAND) GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB IT SE

17P Request for examination filed

Effective date: 19921110

17Q First examination report despatched

Effective date: 19940322

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT SE

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 59105234

Country of ref document: DE

Date of ref document: 19950524

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950515

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950912

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960709

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960711

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960717

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19960911

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970402

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970721

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970731

BERE Be: lapsed

Owner name: NOKIA (DEUTSCHLAND) G.M.B.H.

Effective date: 19970731

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980331

EUG Se: european patent has lapsed

Ref document number: 91112202.6

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050720