US20070283677A1 - Diaphragm Structure - Google Patents

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.

Description

BACKGROUND OF THE INVENTION
• 1. Field of the Invention
• The present invention relates generally to a diaphragm structure, such as a damper or a cone paper for a speaker.
• 2. The Prior Arts
• 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.
• 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.
• The cone paper and the damper of the speaker are members that can produce vibration, which are generally called “diaphragm”.
• Other kinds of speakers may have different structures. However, they include at least a diaphragm and have the same operation principles.
• Referring toFIG. 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.
• 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.
• 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.
• 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
• 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.
• 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.
• 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.
• 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.
• 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.
• 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
• 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:
• FIG. 1 is a plane sectional view of a typical dynamic coil speaker;
• FIG. 2 is a perspective sectional view of a diaphragm served as a damper for a speaker according to the present invention;
• FIG. 3 is a perspective sectional view of a diaphragm served as a cone paper for a speaker according to the present invention;
• FIG. 4 shows a surface material that is to be manufactured to the diaphragm of the present invention;
• FIG. 5 is an enlarged view of anarea5 inFIG. 4;
• FIG. 6 is a locally perspective sectional view taken through line VI-VI ofFIG. 4;
• 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;
• 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
• 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
• Referring toFIG. 4, asurface material1 is woven with appropriate yarns. Thesurface material1 can be manufactured to a diaphragm in accordance with the present invention, such as the damper F shown inFIG. 2 and the cone paper E shown inFIG. 3, through resin dipping, drying, molding and trimming processes.
• Referring toFIG. 5, thesurface material1 of the present invention is woven with a plurality ofyarns10 using any available weaving technologies. The structure of thesurface material1 is similar to the conventional knitwear structure and may print various patterns and stripes thereon.
• FIG. 6 shows the structure of thesurface material1 according to the present invention. Thesurface material1 is woven with a plurality ofmetal yarns10 not conventional pure yarns. Themetal yarn10 comprises a plurality ofmetal wires102 and a plurality ofyarns101 interfused and entwisted together.
• The structure of themetal yarn10 may have different types. For example, FIG.7 shows themetal yarn10 comprises onemetal wire102 and a plurality ofyarns101 entwisted around themetal wire102 according to a first embodiment of the present invention;FIG. 8 shows themetal yarn10 comprises onemetal wire102 and a plurality ofyarns101 entwisted around oneyarn101 according to a second embodiment of the present invention; andFIG. 9 shows themetal yarn10 comprises threemetal wires102 and a plurality ofyarns101 entwisted around oneyarn101 according to a third embodiment of the present invention. The quantity of themetal wires102 and theyarns101 can be adjusted according to the actual demands. Therefore, themetal yarn10 may be woven into thesurface material1 for further manufacturing the diaphragm.
• FIGS. 7-9 show the different structure of the metal yarns, respectively. However, they have a common characteristic that the quantity of themetal wires102 is less than that of theyarns101, so that the diaphragm can keep appropriate flexibility and elasticity. When the quantity of themetal wires102 is larger than that of theyarns101, the diaphragm might be over rigid.
• 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.
• 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.

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 inclaim 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 inclaim 1 or2, 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 inclaim 3, wherein the plurality of yarns surround the metal wires to form the metal yarn.

5. The diaphragm structure as claimed inclaim 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 inclaim 4, wherein the metal yarn includes one metal wire.

7. The diaphragm structure as claimed inclaim 5, wherein the metal yarn comprises one metal wire.

8. The diaphragm structure as claimed inclaim 5, wherein the metal yarn comprises two metal wires.

9. The diaphragm structure as claimed inclaim 5, wherein the metal yarn comprises three metal wires.

10. The diaphragm structure as claimed inclaim 1 or2, wherein the diaphragm is a damper for a speaker.

11. The diaphragm structure as claimed inclaim 1 or2, wherein the diaphragm is a cone paper for a speaker.

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