JP2553869Y2 - Speaker diaphragm structure - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is based on the physical properties of vacuum-deposited silica or alumina on the surface layer of a transparent (including white) colorable glass fiber diaphragm. The present invention relates to a suitable speaker diaphragm structure for improving characteristics. (B) Prior art A partial cross-sectional perspective view shown in FIG. 3 shows a conventional speaker diaphragm structure. In the figure, reference numeral 1 denotes a diaphragm made of a reinforced plastic material in which glass fibers 5 are colored, and is formed of a plain woven cloth in which wefts 2 and warps 3 of glass fibers 5 are interwoven. Reference numeral 4 denotes an edge attached to the outer peripheral portion of the diaphragm 1. (C) Problems to be solved by the invention However, in the above-mentioned conventional device, since a large surface pressure is applied during the molding of the prepreg cloth, the color of the glass fiber 5 may be transferred to the die surface, that is, may be decolorized. In addition, there is a disadvantage that slight discoloration occurs due to poor weather resistance. This invention has been made in view of the above points,
An object of the present invention is to provide a loudspeaker diaphragm structure which has solved the disadvantages of the prior art. (D) Means for Solving the Problem The speaker diaphragm structure according to the present invention includes a woven fabric layer in which a transparent reinforcing fiber is plain-woven, and a colored layer formed of a colored pigment formed on the woven fabric layer. And a low-temperature vapor-deposited layer formed on the colored layer, and formed by forming a diaphragm base material entirely impregnated with a resin. (E) Function The speaker diaphragm vibrates by forming a colored layer with colored pigment on the surface of a woven fabric layer in which transparent reinforcing fibers are plain-woven, forming a low-temperature evaporated layer by performing an evaporation process at 120 ° C or lower. It is made by impregnating the whole with a resin to form a prepreg, and molding it into a predetermined shape with a mold to obtain a plate base material and mold it, so that it has excellent physical properties (coloring strength, weather resistance, Improvement in sound speed and the like) can be obtained. (F) Embodiment An embodiment of the speaker diaphragm structure according to the present invention will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a partially sectional perspective view of the diaphragm, and FIG. 2 is an enlarged plan view in which a part of the plane of the diaphragm is enlarged. In the figure, reference numeral 1 denotes a diaphragm made of glass fiber 5, and the glass fiber 5 forming the diaphragm 1 is composed of a weft 2 (count 45.0 tex, density 25 / inch) and a warp 3 (count 6).
It is a plain woven cloth obtained by interweaving cloths of 7.5 tex and density of 25 / inch, and constitutes a woven fabric layer. Further, in order to color the plain woven cloth obtained by interweaving the glass fibers 5, a colored layer is formed by using a ceramic colored pigment, and several thousand at a temperature of 100 to 120 ° C. to protect the colored layer. Angstrom silica vapor deposition 6 or alumina vapor deposition to form a low-temperature vapor deposition layer,
A diaphragm substrate was obtained. Then, it was prepregged with an unsaturated epoxy resin for molding, and a diaphragm 1 having a predetermined shape was obtained with a mold. As a result, the sound speed of the conventional one that was just colored was 2500 m /
It was 2 seconds, but it was 2700 m / sec for the case where silica deposition 6 was applied, and despite the high molding press pressure, there was no decolorization due to the improvement of color adhesion strength, and the weather resistance also improved with the deposition did. In addition, silica deposition 6 and alumina deposition 10
It can be processed at a temperature of 0 to 120 ° C.
Since no thermal stress is applied to the warp yarn 3, the physical properties (elastic modulus, strength, etc.) of the yarn are not impaired. In addition, conventional vacuum evaporation was advantageous as an evaporation means in terms of cost. However, in order to improve adhesion strength and film quality, ion plating or low-temperature plasma was used.
The CVD method is appropriate. On the other hand, to form a laminated diaphragm (not shown), both the surface layer and the back surface layer may be made of glass fiber 5, or the surface layer may be made of glass fiber 5 and the back layer may be made of pulp material. Even when the diaphragm 1 is made of the glass fiber 5 made of a single fiber, the same effect is obtained. Reference numeral 4 denotes an edge attached to the outer peripheral portion of the diaphragm 1. As an example of application, as an example of a transparent (opaque) reinforcing fiber, a super-drawn polyethylene fiber or a super-drawn polypropylene fiber may be used. In this case, the two fibers have a higher elastic modulus than the glass fiber 5. Since it is weak against heat, the treatment time is short as a vapor deposition means, the deposition rate is high, and excellent physical properties can be obtained by treatment with an ion plating method having a strong adhesion strength. (G) Effect of the Invention According to the diaphragm structure of the speaker according to the invention, the surface of the woven fabric layer formed by plain weaving of the transparent reinforcing fiber is colored with a colored pigment, and the vapor-deposited layer is formed at 120 ° C. or less. Formed, the adhesion strength accompanying coloring was improved, and the weather resistance and the appearance of the diaphragm were not impaired. Further, since the deposition temperature is low, the physical properties (elastic modulus, strength, etc.) of the weft and the warp are not impaired. Furthermore, the sound speed can be improved as compared with a conventional diaphragm which is merely colored, and in particular, a glass fiber is plain-woven to form a woven fabric layer, and a colored layer is formed on the surface of the woven fabric layer, In a speaker diaphragm composed of a diaphragm base material formed by forming a low-temperature deposition treatment layer by silica deposition, 27
Excellent sound speed of 00m / sec was obtained. Furthermore, since the adhesion strength accompanying coloring was improved, the weather resistance and the appearance of the diaphragm were not impaired. In addition, since it has a simple structure and can be configured at low cost, it has excellent features such as easy implementation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 show an embodiment of a speaker diaphragm structure according to the present invention, FIG. 1 is a partially sectional perspective view of the diaphragm, and FIG. It is the plane enlarged view which expanded a plane part. FIG. 3 is a partially sectional perspective view showing a conventional speaker diaphragm structure. 1: diaphragm 2: weft 3: warp 4: edge 5: glass fiber 6: silica deposition

Claims (1)

(57) [Rules for requesting registration of utility model] A woven fabric layer obtained by plain weaving a transparent reinforcing fiber, a colored layer formed of a colored pigment formed on the woven fabric layer, and a low-temperature deposition treatment layer formed on the colored layer, and A speaker diaphragm structure characterized by forming a diaphragm base material entirely impregnated with resin. 2. The speaker diaphragm structure according to claim 1, wherein the transparent reinforcing fiber is a glass fiber. 3. 2. The speaker diaphragm structure according to claim 1, wherein said low-temperature evaporation treatment layer is formed by vacuum evaporation of silica or alumina.