EP1351548A2 - Lautsprecherschwingspule mit Schwingspulenbefestigungsmechanismus - Google Patents

Lautsprecherschwingspule mit Schwingspulenbefestigungsmechanismus Download PDF

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Publication number
EP1351548A2
EP1351548A2 EP02022733A EP02022733A EP1351548A2 EP 1351548 A2 EP1351548 A2 EP 1351548A2 EP 02022733 A EP02022733 A EP 02022733A EP 02022733 A EP02022733 A EP 02022733A EP 1351548 A2 EP1351548 A2 EP 1351548A2
Authority
EP
European Patent Office
Prior art keywords
voice coil
coil
sleeve
bobbin
collars
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Withdrawn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
EP02022733A
Other languages
English (en)
French (fr)
Other versions
EP1351548A3 (de
Inventor
Jiansong Zhang
Huijun Zhao
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.)
Speaker Electronic Jiashan Co Ltd
Original Assignee
Speaker Electronic Jiashan 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 Speaker Electronic Jiashan Co Ltd filed Critical Speaker Electronic Jiashan Co Ltd
Publication of EP1351548A2 publication Critical patent/EP1351548A2/de
Publication of EP1351548A3 publication Critical patent/EP1351548A3/de
Withdrawn legal-status Critical Current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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil

Definitions

  • the softened or charred cement would make the coil to be easily slackened and dispersed apart or even to come off from the bobbin, resulting in the damage of the loudspeaker. Therefore, the assurance to keep the coil fixed and not to be slackened and dispersed apart has become a subject for study in this technical field.
  • U.S. Patent No. 4,118,605 disclosed a structure of voice coil.
  • an annular groove is formed on the periphery of the voice coil bobbin and the coil is wound within the groove.
  • the structure of the annular groove makes winding of the coil easy and the top and bottom end faces of the groove perform the function of stopping the coil.
  • a cylindrical coil-fixing device is provided with an outer diameter thereof being larger than the inner diameter but smaller than the outer diameter of the voice coil bobbin. On the inner wall of the bobbin there is a step for the cylindrical fixing device to be inserted in. The coil is wound on the peripheral wall of the fixing device, the top end of it being stopped by the bottom end of the voice coil bobbin.
  • the inserting structure of the second embodiment has one more defect, that is the engaging area between the coil fixing device and the body of the voice coil bobbin is too small, so that the degree of sticking and fixing between them is open to question, because it is hard to avoid separating from each other, especially in high power operating condition.
  • the object of the present invention is to overcome the shortcomings of the prior art and to propose a loudspeaker voice coil having a coil fixing mechanism, in which the coil is firmly fixed on the voice coil bobbin, not easily slackened and dispersed apart or come off from the bobbin, while the tone quality and the timbre are still ensured.
  • the process of making the voice coil as a whole is convenient with high production efficiency, being suitable for mass production.
  • the coil is wound in the groove of the coil fixing mechanism, the two ends of the coil are stopped by the collars of the mechanism, which ensures that such trouble as the slackening and dispersing apart or coming off from the bobbin of the coil would not happen, so that the loudspeaker can still operate normally despite of high input power and big increase of temperature.
  • the sleeve of the coil fixing mechanism is stuck with the bobbin in a large area, that makes a strong joining of the two, and the processing of this kind of voice coil bobbin is simple and easy, so it can increase greatly the production efficiency and is suitable for mass production.
  • the loudspeaker voice coil with a coil fixing mechanism comprises a cylindrical voice coil bobbin 1, a coil 4 and a conical diaphragm and an damper (not shown) fixed on the voice coil bobbin, a sleeve 3 wrapping around and adhering tightly to the bobbin 1 against its outer peripheral wall, the top and bottom ends of the sleeve are bent outward to form the collars 2, 5 ( to bend the portion in dash line to form the collars as shown in Fig.3 ), a groove 7 is formed of the collars 2, 5 together with the body of the sleeve constituting a fixing mechanism for the coil 4 so that the coil 4 is easily wound to adhere in the groove and its two ends are stopped by the collars 2, 5.
  • the coil will not be slackened and dispersed apart or come off from the bobbin even if it is in the conditions that the voice coil bobbin under high power suffers heavier vibration and the cement used to stick the coil is heated to be softened.
  • Fig.2 and Fig.4 it is possible that only one end of the sleeve 3 is bent outward to form a collar 2, while the other collar 6 for forming the groove 7 of the coil fixing mechanism is formed by bending outward the end of the voice coil bobbin, which end is adjacent to the coil.
  • the coil 4 is wound in the groove 7 formed of the collar 2, 6 and the body of the sleeve 3, it can as well perform the same function of preventing the coil from being slackened and dispersed apart or coming off from the bobbin.
  • the two ends of the sleeve before bending are cut to form some spaced notches on them first, then they are bent outward to form the collar surface with the notches 8 as shown in Fig.5.
  • the sleeve 3 of the voice coil may as well consist of several disconnected lining bars 9 distributed evenly or unevenly over the outer periphery of the voice coil bobbin.
  • the ends of the lining bars are bent outward to form collars to attach to the end of the coil for stopping it, which can as well make the coil adhere firmly to the voice coil bobbin and prevent the coil from being slackened and dispersed apart or coming off from the bobbin.
  • the sleeve 3 is stamped with several holes on the surface, as shown in Fig. 7. It will increase not only the friction between the sleeve and the voice coil bobbin, but also their sticking firmness because of some cement remaining in the small holes. In addition, the holes also make the air discharging easily, no bubble existing between the sleeve 3 and the voice coil bobbin 1 and no separation will occur when they are adhered to each other. Similarly, to get the same effect, the part of the peripheral wall of the voice coil bobbin that attach to the sleeve 3 also can be stamped with holes, while the sleeve 3 can be either provided with smooth surface or stamped with holes.
  • the material of the sleeve may be either non-magnet-conductive light alloy, or plastics or paper. If the light alloy is selected, a longitudinal groove shall be opened up for preventing eddy current from being generated in it and for serving as a compensation slot for thermal expansion and contraction. If plastics or paper is selected, more notches should be cut on the ends of the sleeve so as to facilitate the bending.
  • the collars in the structure described above can also be acquired by externally connecting separate collars to the ends of the sleeve or the end of the voice coil bobbin in the way of sticking or scarf jointing.
  • the present invention is not limited only to the embodiments described above. Any change or modification made for the invention in the scope of appended Claims shall be considered to be within the realm of the present invention.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
EP02022733A 2002-01-28 2002-10-11 Lautsprecherschwingspule mit Schwingspulenbefestigungsmechanismus Withdrawn EP1351548A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN02215494U CN2523162Y (zh) 2002-01-28 2002-01-28 能防止散圈的音圈
CN02215494 2002-01-28

Publications (2)

Publication Number Publication Date
EP1351548A2 true EP1351548A2 (de) 2003-10-08
EP1351548A3 EP1351548A3 (de) 2004-11-03

Family

ID=4764264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02022733A Withdrawn EP1351548A3 (de) 2002-01-28 2002-10-11 Lautsprecherschwingspule mit Schwingspulenbefestigungsmechanismus

Country Status (2)

Country Link
EP (1) EP1351548A3 (de)
CN (1) CN2523162Y (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1601230A3 (de) * 2004-05-24 2009-08-26 Blast Loudspeakers Ltd. Lautsprechersystem
CN106162462A (zh) * 2016-08-18 2016-11-23 歌尔股份有限公司 一种音圈骨架及扬声器中的振动系统
CN107404691A (zh) * 2017-08-04 2017-11-28 奥音科技（镇江）有限公司 一种新型音圈

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL30952C (de) * 1930-04-03
JPS5389728A (en) * 1977-01-19 1978-08-07 Sansui Electric Co Loudspeaker unit
JP3311471B2 (ja) * 1994-02-25 2002-08-05 スター精密株式会社 電磁音響変換器及びその巻線の巻回方法
DE4419250A1 (de) * 1994-06-01 1995-12-07 Nokia Deutschland Gmbh Schwingspulenträger für Lautsprecher
US5734734A (en) * 1995-12-29 1998-03-31 Proni; Lucio Audio voice coil adaptor ring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1601230A3 (de) * 2004-05-24 2009-08-26 Blast Loudspeakers Ltd. Lautsprechersystem
CN106162462A (zh) * 2016-08-18 2016-11-23 歌尔股份有限公司 一种音圈骨架及扬声器中的振动系统
CN106162462B (zh) * 2016-08-18 2019-09-17 歌尔股份有限公司 一种音圈骨架及扬声器中的振动系统
CN107404691A (zh) * 2017-08-04 2017-11-28 奥音科技（镇江）有限公司 一种新型音圈
CN107404691B (zh) * 2017-08-04 2023-08-18 奥音科技（镇江）有限公司 一种新型音圈

Also Published As

Publication number Publication date
CN2523162Y (zh) 2002-11-27
EP1351548A3 (de) 2004-11-03

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