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Publication numberUS20070283677 A1
Publication typeApplication
Application numberUS 11/423,705
Publication date13 Dec 2007
Filing date12 Jun 2006
Priority date12 Jun 2006
Publication number11423705, 423705, US 2007/0283677 A1, US 2007/283677 A1, US 20070283677 A1, US 20070283677A1, US 2007283677 A1, US 2007283677A1, US-A1-20070283677, US-A1-2007283677, US2007/0283677A1, US2007/283677A1, US20070283677 A1, US20070283677A1, US2007283677 A1, US2007283677A1
InventorsHiroshi Ohara
Original AssigneeHiroshi Ohara
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Diaphragm Structure
US 20070283677 A1
Abstract
A diaphragm structure includes a plurality of yarns and a plurality of metal wires interfused and entwisted with each other to form a metal yarn, which is woven into a surface material, and the surface material is further shaped into the diaphragm, such as a damper and a cone paper for a speaker. By the diaphragm structure with the metal wires, it can be increased in its strength, availability and tearing resistance. The metal wires and the yarns may be entwisted together in different types according to users' desires to obtain the required strength and elasticity.
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Claims(11)
1. A diaphragm structure, comprising:
a plurality of yarns; and
a plurality of metal wires interfused with the plurality of yarns, which are woven into a surface material, and the surface material is shaped into the diaphragm.
2. The diaphragm structure as claimed in claim 1, wherein the quantity of the yarns included in the surface material is larger than that of the metal wires.
3. The diaphragm structure as claimed in claim 1 or 2, wherein the metal wires and the yarns are entwisted together to form a metal yarn, which is woven into the surface material.
4. The diaphragm structure as claimed in claim 3, wherein the plurality of yarns surround the metal wires to form the metal yarn.
5. The diaphragm structure as claimed in claim 3, wherein the plurality of metal wires and the plurality of yarns surround one yarn to form the metal yarn.
6. The diaphragm structure as claimed in claim 4, wherein the metal yarn includes one metal wire.
7. The diaphragm structure as claimed in claim 5, wherein the metal yarn comprises one metal wire.
8. The diaphragm structure as claimed in claim 5, wherein the metal yarn comprises two metal wires.
9. The diaphragm structure as claimed in claim 5, wherein the metal yarn comprises three metal wires.
10. The diaphragm structure as claimed in claim 1 or 2, wherein the diaphragm is a damper for a speaker.
11. The diaphragm structure as claimed in claim 1 or 2, wherein the diaphragm is a cone paper for a speaker.
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    1. Field of the Invention
  • [0002]
    The present invention relates generally to a diaphragm structure, such as a damper or a cone paper for a speaker.
  • [0003]
    2. The Prior Arts
  • [0004]
    FIG. 1 shows a typical structure of a dynamic coil speaker, which comprises a power system, a cone paper and a suspension system. The power system comprises a magnet A, an iron core B, a gap C and a voice coil D. The cone paper E is a diaphragm for vibrating or moving air, which is generally shaped into a conical or semi-spherical voice cavity. The suspension system comprises a damper F and an edge suspension structure for limiting movement of the cone paper E in a specific direction.
  • [0005]
    The principle of speaker is described as follows. When the voice coil D is loaded by AC current, the current-carrying voice coil D in a magnetic field of the magnet A experiences a magnetic force and moves up and down in the gap C, so that the cone paper E attached to the voice coil D moves air to produce sound.
  • [0006]
    The cone paper and the damper of the speaker are members that can produce vibration, which are generally called “diaphragm”.
  • [0007]
    Other kinds of speakers may have different structures. However, they include at least a diaphragm and have the same operation principles.
  • [0008]
    Referring to FIG. 2, in view that the damper is used for suspending the voice coil and the cone paper, it is generally designed to have a plurality of concentric circular peaks and valleys. That means it has a corrugated structure, which makes the damper have an elastic function like a spring and can support the voice coil and the cone paper. Therefore, the elasticity and strength of the damper will directly affect the strength and amplitude of the cone paper and further affect its sound effect.
  • [0009]
    The conventional damper is generally made of cloth surface material, which is dipped in resin, dried and integrally formed by a mold. In view the surface material is woven with yarns, the damper may have a lower strength and a bad tearing resistance, thereby causing its deformation and affecting its sound quality.
  • [0010]
    FIG. 3 shows a structure of a typical cone paper for a speaker. The shape, size and material of the cone paper will influence its sound quality. The materials of the cone paper generally include cloth, paper (mixture of paper and fiberglass), resin, polypropylene, silk, aluminum, titanium, beryllium, aluminum-magnesium alloys, ceramics and wood. The materials can be chosen according to high or low frequency speakers and the desired tone quality. Generally, cloth, paper, resin and silk exhibit lower rigidity during vibration and more temperate quality but not clear. Titanium and beryllium exhibit higher vibration frequency, and clear and trenchant sound quality.
  • [0011]
    Basically, the cone paper made by cloth or silk has lower strength and tearing resistance. After used a period of time, it easily causes a deformation, thereby affecting its sound quality.
  • SUMMARY OF THE INVENTION
  • [0012]
    A primary objective of the present invention is to provide a diaphragm structure, which can solve the above-mentioned drawbacks of the conventional diaphragm and enhance its strength and tearing resistance, but not decrease the required elasticity.
  • [0013]
    To achieve the above-mentioned objectives, a surface material, which is to be manufactured to a diaphragm in accordance with the present invention, is interfused with metal wires. Thus, the diaphragm can be increased in its strength and tearing resistance.
  • [0014]
    The main solution of the present invention is to interfuse metal wires with yarns and then be weaved to a surface material, wherein the quantity of the metal wires is less than that of the yarns. Finally, the surface material is shaped into the diaphragm.
  • [0015]
    Another solution of the present invention is to entwist at least one metal wire with the yarns to form a metal yarn, and then, use the metal yarn to form the surface material.
  • [0016]
    A further solution of the present invention is to surround at least one metal wire with a plurality of yarns to form a metal yarn, or surround one yarn with a plurality of metal wires and a plurality of yarns to form a metal yarn, and then, use the metal yarn to form the surface material for manufacturing the diaphragm.
  • [0017]
    In sum, a diaphragm structure includes a plurality of yarns and a plurality of metal wires interfused and entwisted with each other to form a metal yarn, which is woven into a surface material, and the surface material is further shaped into the diaphragm, such as a damper and a cone paper for a speaker. By the diaphragm structure with the metal wires, it can be increased in its strength, availability and tearing resistance.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0018]
    The present invention will be apparent to those skilled in the art by reading the following detailed description of preferred embodiments thereof, with reference to the attached drawings, in which:
  • [0019]
    FIG. 1 is a plane sectional view of a typical dynamic coil speaker;
  • [0020]
    FIG. 2 is a perspective sectional view of a diaphragm served as a damper for a speaker according to the present invention;
  • [0021]
    FIG. 3 is a perspective sectional view of a diaphragm served as a cone paper for a speaker according to the present invention;
  • [0022]
    FIG. 4 shows a surface material that is to be manufactured to the diaphragm of the present invention;
  • [0023]
    FIG. 5 is an enlarged view of an area 5 in FIG. 4;
  • [0024]
    FIG. 6 is a locally perspective sectional view taken through line VI-VI of FIG. 4;
  • [0025]
    FIG. 7 is a plane sectional view of a metal yarn, which comprises one metal wire and a plurality of yarns entwisted around the metal wire according to a first embodiment of the present invention;
  • [0026]
    FIG. 8 is a plane section view of a metal yarn, which comprises one metal wire and a plurality of yarns entwisted around one yarn according to a second embodiment of the present invention; and
  • [0027]
    FIG. 9 is a plane sectional view of a metal yarn, which comprises three metal wires and a plurality of yarns entwisted around one yarn according to a third embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0028]
    Referring to FIG. 4, a surface material 1 is woven with appropriate yarns. The surface material 1 can be manufactured to a diaphragm in accordance with the present invention, such as the damper F shown in FIG. 2 and the cone paper E shown in FIG. 3, through resin dipping, drying, molding and trimming processes.
  • [0029]
    Referring to FIG. 5, the surface material 1 of the present invention is woven with a plurality of yarns 10 using any available weaving technologies. The structure of the surface material 1 is similar to the conventional knitwear structure and may print various patterns and stripes thereon.
  • [0030]
    FIG. 6 shows the structure of the surface material 1 according to the present invention. The surface material 1 is woven with a plurality of metal yarns 10 not conventional pure yarns. The metal yarn 10 comprises a plurality of metal wires 102 and a plurality of yarns 101 interfused and entwisted together.
  • [0031]
    The structure of the metal yarn 10 may have different types. For example, FIG. 7 shows the metal yarn 10 comprises one metal wire 102 and a plurality of yarns 101 entwisted around the metal wire 102 according to a first embodiment of the present invention; FIG. 8 shows the metal yarn 10 comprises one metal wire 102 and a plurality of yarns 101 entwisted around one yarn 101 according to a second embodiment of the present invention; and FIG. 9 shows the metal yarn 10 comprises three metal wires 102 and a plurality of yarns 101 entwisted around one yarn 101 according to a third embodiment of the present invention. The quantity of the metal wires 102 and the yarns 101 can be adjusted according to the actual demands. Therefore, the metal yarn 10 may be woven into the surface material 1 for further manufacturing the diaphragm.
  • [0032]
    FIGS. 7-9 show the different structure of the metal yarns, respectively. However, they have a common characteristic that the quantity of the metal wires 102 is less than that of the yarns 101, so that the diaphragm can keep appropriate flexibility and elasticity. When the quantity of the metal wires 102 is larger than that of the yarns 101, the diaphragm might be over rigid.
  • [0033]
    According to the present invention, the diaphragm has the metal wires; thereby the strength, availability and tearing resistance of the diaphragm can be increased. And it has more durable than the conventional diaphragm and can improve the quality of speakers.
  • [0034]
    While the present invention has been described by way of example and in terms of preferred embodiments, it is to be understood that the present invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements as would be apparent to those skilled in the art. Therefore, the scope of the appended claims should be accorded the broadest interpretation to encompass all such modifications and similar arrangements.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3882667 *5 Mar 197313 May 1975Brunswick CorpMethod of making a composite yarn
US4350731 *8 Jun 198121 Sep 1982Albany International Corp.Novel yarn and fabric formed therefrom
US4460060 *27 Aug 198117 Jul 1984Toray Industries, Inc.Vibratory diaphragm for loudspeaker
US5878150 *27 Mar 19952 Mar 1999Matsushita Electric Industrial Co., Ltd.Damper for a loudspeaker and a method for producing the same
US5927060 *20 Oct 199727 Jul 1999N.V. Bekaert S.A.Electrically conductive yarn
US7155891 *15 Sep 20032 Jan 2007E. I. Du Pont De Nemours And CompanyComposite twist core-spun yarn and method and device for its production
US7176387 *5 Dec 200513 Feb 2007King Star Enterprise, Inc.Electromagnetic shielding device
US20020100635 *5 Feb 20021 Aug 2002Toshihide InoueSpeaker diaphragm
US20040065072 *3 Oct 20028 Apr 2004Nanoamp Solutions, Inc.Ply-twisted yarn for cut resistant fabrics
US20040068972 *9 Oct 200215 Apr 2004Japan Basic Material Co., Ltd.Conjugated yarn and fiber reinforced plastic
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US8813906 *16 Oct 201226 Aug 2014Hiroshi OharaSpeaker damper and manufacturing method of the same
US9516422 *16 Feb 20156 Dec 2016Hiroshi OharaWeaving method for a damper of a loudspeaker
US9762998 *7 Dec 201512 Sep 2017David GoreLoudspeaker with sound dispersion lens
US20140102825 *16 Oct 201217 Apr 2014Hiroshi OharaSpeaker damper and manufacturing method of the same
US20160241964 *16 Feb 201518 Aug 2016Hiroshi OharaWeaving method for a damper of a loudspeaker
Classifications
U.S. Classification57/210
International ClassificationD02G3/36
Cooperative ClassificationH04R9/043, H04R2307/025, D02G3/12, H04R2307/027, H04R7/02
European ClassificationD02G3/12, H04R9/04E2, H04R7/02