EP1204296A2 - Mikro-lautsprecher - Google Patents

Mikro-lautsprecher Download PDF

Info

Publication number
EP1204296A2
EP1204296A2 EP01308948A EP01308948A EP1204296A2 EP 1204296 A2 EP1204296 A2 EP 1204296A2 EP 01308948 A EP01308948 A EP 01308948A EP 01308948 A EP01308948 A EP 01308948A EP 1204296 A2 EP1204296 A2 EP 1204296A2
Authority
EP
European Patent Office
Prior art keywords
case
leads
microspeaker
secured
vibrating plate
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.)
Ceased
Application number
EP01308948A
Other languages
English (en)
French (fr)
Other versions
EP1204296A3 (de
Inventor
Kazumi Miyamoto
Takashi Kobayashi
Yoshizumi Ohta
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.)
Citizen Electronics Co Ltd
Original Assignee
Citizen Electronics 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
Application filed by Citizen Electronics Co Ltd filed Critical Citizen Electronics Co Ltd
Publication of EP1204296A2 publication Critical patent/EP1204296A2/de
Publication of EP1204296A3 publication Critical patent/EP1204296A3/de
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • 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 microspeaker used in a portable communication equipment such as a portable telephone and other equipments.
  • a yoke 2 made of magnetic material is embedded in a case 1 made of plastic by insert molding.
  • a permanent magnet 3 is secured to the yoke 2, and a top plate 4 made of magnetic material is adhered to the magnet 3 to form a magnetic circuit and to form a magnetic gap between the top plate 4 and the yoke 2.
  • a vibrating plate 6 is secured to the case 1 at the periphery thereof.
  • a voice coil 5 secured to the underside of the vibrating plate 6 is inserted in the magnetic gap.
  • Aprotector 7 made of metal is secured to the case 1, interposing the vibrating plate 6.
  • a plurality of sound discharge holes are formed in the case 1 and the protector 7.
  • a pair of ends 9 of the voice coil 5 are adhered to the underside of the vibrating plate 6 as shown in Fig. 16. Each of the ends 9 is outwardly extended from the case 1 passing through a groove formed in a peripheral wall of the case.
  • a substrate 8 made of plastic is adhered, and a pair of terminal plates 10 are secured to the substrate 8.
  • Each of the terminal plate has a V-shape and each end 9 is connected to one of the branches of the terminal plate 10 by solder 11. The other branch of the terminal plate 10 is used for connecting the end 9 to a circuit of the equipment to be mounted therein.
  • the vibrating plate 6 vibrates to produce sounds.
  • the substrate 8 is adhered and ends 9 of the voice coil are soldered to the terminal plates 10. Consequently, an assembling operation of the speaker is complicated.
  • An object of the present invention is to provide a microspeaker which may be assembled without substrate and the soldering operation, thereby reducing the number of parts and assembling steps.
  • a microspeaker comprising a case, a yoke made of magnetic material, a permanent magnet provided in the case, a vibrating plate, a voice coil, a protector plate, the yoke, vibrating plate and protector plate being secured to the case, a pair of leads embedded in one of members made of plastic, both end portions of each of the leads being projected from the case, each of both ends of the voice coil being secured to one of the projected end portions of each of the leads, and both the projected end portions of each of the leads being bent along a periphery of the case.
  • Each of the leads has an arcuated shape.
  • the leads are embedded in the case.
  • the leads are embedded in the protector plate.
  • the case may comprise an upper case and a lower case, and the leads are embedded in the upper case, and the vibrating plate is secured to the upper case.
  • the microspeaker of the first embodiment of the present invention comprises a yoke 13 made of magnetic material and embedded in a case 12 by insert molding, a permanent magnet 14 secured to the yoke 13, and a top plate 15 adhered to the magnet 14.
  • a vibrating plate 17 is secured to the case 12 at the periphery thereof.
  • a voice coil 16 secured to the underside of the vibrating plate 17 is inserted in the magnetic gap between the top plate 15 and the yoke 13.
  • a protector plate 18 made of metal is secured to the case 12, interposing the vibrating plate 17.
  • a plurality of sound discharge holes are formed in the case 12 and the protector plate 18.
  • a pair of arcuated leads 21 made of metal are symmetrically disposed and embedded in the case 12 by insert molding.
  • An end 21a of each of the leads 21 is elongated and bent toward a recess 12a formed in the peripheral wall of the case 12.
  • the other end 21b is further elongated and bent in a recess 12b of the underside of the case 12 through a periphery recess 12c.
  • the endmost portion is enlarged to form a terminal portion 21c.
  • a pair of ends 20 of the voice coil 16 are adhered to the underside of the vibrating plate 17.
  • Each of the ends 20 is outwardly extended from the case 12 passing through a groove formed in a peripheral wall of the case, and wound on the end 21a of the lead 21 and fixed thereto by soldering or welding.
  • the terminal portion 21c is contacted with a terminal of an equipment in which the microspeaker is mounted.
  • Figs. 3 and 4 show conditions of the leads 21 before bending.
  • the end 20 is wound on the end 21a and fixed thereto by soldering or welding. Ends 21a and 21b are bent as shown by arrows in Fig. 4.
  • Figs. 5 and 6 show the second embodiment of the present invention, and the same portions as the first embodiment are identified by the same reference numerals as the first embodiment.
  • a protector plate 18a is made of plastic and the leads 21 are embedded in the protector as shown in Fig. 8.
  • the case 12 has a groove 12a.
  • the ends 20 of the voice coil 16 are projected from the groove 12a as shown in Fig. 8.
  • the protector plate 18a is adhered to the case 12 and the ends 20 are fixed to the ends 21a as shown in Fig. 9. Next, the ends 21a and 21b are bent as shown by arrows in Fig. 9, so that the microspeaker is assembled as shown in Figs. 5 and 6.
  • Figs. 10 and 11 show the third embodiment of the present invention.
  • the case is divided into a lower case 22 and an upper case 23.
  • the leads 21 are embedded in the upper case 23.
  • Figs. 12 and 13 show the microspeaker before the assembling thereof.
  • the vibrating plate 17 is fixed to the upper case 23 and the voice coil 16 is secured to the vibrating plate 17.
  • the vibrating plate 17 may be fixed to the case through a fixing plate, and the leads may be fixed to the fixing plate.
  • the voice coil 16 must be secured to the vibrating plate 17 before the vibrating plate 17 is fixed to the case.
  • the voice coil 16 may be secured to the vibrating plate 17 after the vibrating plate is fixed to the upper case 23. Therefore, the assembling operation can be easily performed since the vibrating plate 17 is enforced by the upper case 23. Furthermore, since either of the leads 21 and the vibrating plate 17 are secured to the upper case 23, the positioning of the voice coil 16 and the ends 20 can be easily carried out.
  • an end portion 21d of the lead 21 is downwardly bent and the end 20 of the voice coil 16 is put to the corner of the end portion 21d, and the end 20 is soldered to the end portion 21d. Then, the end portion 21d is further bent as shown in Fig. 14b. Since the vibrating plate 17 is enforced as described above, the securing operation of the voice coil 16 and the end portion 21d can be performed by automatic operation.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
EP01308948A 2000-11-06 2001-10-22 Mikro-lautsprecher Ceased EP1204296A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000033898 2000-11-06
JP2000033898U 2000-11-06

Publications (2)

Publication Number Publication Date
EP1204296A2 true EP1204296A2 (de) 2002-05-08
EP1204296A3 EP1204296A3 (de) 2005-04-13

Family

ID=18558315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01308948A Ceased EP1204296A3 (de) 2000-11-06 2001-10-22 Mikro-lautsprecher

Country Status (1)

Country Link
EP (1) EP1204296A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005019137A1 (de) * 2005-04-20 2006-11-02 S1Nn Gmbh & Co. Kg Lautsprecher und Lautsprecherkomponenten
WO2018040615A1 (zh) * 2016-08-31 2018-03-08 歌尔股份有限公司 一种扬声器模组壳体、扬声器模组及发声装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62289099A (ja) * 1986-06-09 1987-12-15 Matsushita Electric Ind Co Ltd スピ−カ

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315112A (en) * 1979-12-12 1982-02-09 Alan Hofer Speaker
JPS57154997A (en) * 1981-03-19 1982-09-24 Seiko Instr & Electronics Ltd Motor-driven speaker
US5181253A (en) * 1991-01-08 1993-01-19 Southern Audio Services, Inc. Loudspeaker assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62289099A (ja) * 1986-06-09 1987-12-15 Matsushita Electric Ind Co Ltd スピ−カ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005019137A1 (de) * 2005-04-20 2006-11-02 S1Nn Gmbh & Co. Kg Lautsprecher und Lautsprecherkomponenten
WO2018040615A1 (zh) * 2016-08-31 2018-03-08 歌尔股份有限公司 一种扬声器模组壳体、扬声器模组及发声装置
US10779065B2 (en) 2016-08-31 2020-09-15 Goertek, Inc. Speaker module housing, speaker module and sounding device

Also Published As

Publication number Publication date
EP1204296A3 (de) 2005-04-13

Similar Documents

Publication Publication Date Title
US6400825B1 (en) Microspeaker
US8155374B2 (en) Electroacoustic transducing device
KR100545159B1 (ko) 라우드스피커
US7715585B2 (en) Speaker
US7266213B2 (en) Compact speaker with a protective cover
JP2004266424A (ja) マイクロスピーカ
US7433486B2 (en) Speaker and manufacturing method for the same
US6690809B2 (en) Microspeaker
US6751332B2 (en) Speaker
JPH09275599A (ja) 電気音響変換器
EP1204296A2 (de) Mikro-lautsprecher
JP3856442B2 (ja) スピーカ
US7010142B2 (en) Electrical acoustic converter
JP2002199490A (ja) スピーカ
US6097828A (en) Electroacoustic transducer
JP3840727B2 (ja) スピーカ装置およびその製造方法
KR20040107014A (ko) 스피커용 리드 단자 일체형 댐퍼
KR100570857B1 (ko) 마이크로 스피커용 진동판 및 이를 적용한 마이크로 스피커
JPH0937390A (ja) 電磁型発音体ならびにその製造方法
JP2004023515A (ja) スピーカ
JP2006094073A (ja) 磁気駆動型アクチュエーター
JP2003235095A (ja) 電気−機械振動変換器

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): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20051004

AKX Designation fees paid

Designated state(s): DE

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20070304