Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS62241498 [0001] The present invention relates to a speaker diaphragm and a method of manufacturing the diaphragm, and in particular, has high elasticity and high strength. The heat resistance is excellent, of course, there is little distortion, and the piston motion (i7 area can be expanded, and a diaphragm suitable for woofers and a diaphragm that can be optimally manufactured simply and accurately. It is about (Conventional Jk technology) Although pulp cones and resin cones are used in conventional speaker diaphragms, these diaphragms generally have insufficient rigidity and have disadvantages such as low heat resistance. Moreover, in order to eliminate the defect of the pulp cone mentioned I- and to raise the rigidity of a diaphragm, the diaphragm which formed the synthetic resin layer on the surface of group 7Ii by carbon fiber is also proposed. (Problems to be solved by the invention) [1: in the case of the conventional carbon fiber described, in the case of the diaphragm, pinholes, voids or streaks (map-like flow lines) g of the surface resin layer g And there is no surface stability, and the strength tends to be uneven. In particular, if there is a pin hole (resin removal), air load is less likely to occur, which causes third-order distortion. Further, the diaphragm having the carbon fiber m layer on the surface is excellent in the rigidity f1, but the internal loss is small, and the peak of the crystal region is generated. The object of the present invention is to provide high elasticity, high strength, uniform internal loss equally, excellent in weather resistance and heat resistance, as well as having surface stability and less distortion, ++ r It is an object of the present invention to provide a speaker diaphragm having a wide band and a smooth characteristic and a method of manufacturing the same. The speaker diaphragm according to the present invention is provided with a back cloth layer of glass me on at least the surface side of the diaphragm base by the honeycomb core and the same. A fiber layer of high elasticity M & miscellaneous is provided on L, and a film layer is formed of acetate cellulose on the surface of the fiber layer. The fiber layer to be provided on the back side may be a high elastic fiber different from the fiber layer to be provided on the front side, and a paper 11-05-2019 1 quality layer may be provided on the back side of the diaphragm substrate to form the paper quality layer. It is also possible to form a film layer of acetate cellulose on the surface of. The method for manufacturing a diaphragm for a speaker according to the present invention comprises temporarily bonding a glass fiber cloth backing material of fine cloth and a high elastic fiber such as carbon fiber in a cone shape, and this and a diaphragm base material with a honeycomb core The main body is cured with a thermosetting resin such as an epoxy resin impregnated in the woven fabric by combining and heating and pressing it to obtain a structure, and this structure is coated with an acetate cellulose solution 4j lll1. Heat and pressure molding is performed with a mold to obtain a diaphragm. (Operation) The speaker diaphragm according to the present invention has a structure of a honeycomb base plate made of a diaphragm base, a backing layer of glass fiber cloth, and a fiber layer of high elastic fiber, and has high elasticity and high rigidity. The fiber layer has a moderate internal loss due to the presence of glass fiber cloth punching material, and the fiber, Ill! Since a film layer of acetate cellulose is formed on the surface of the film, it has surface stability as well as weather resistance, heat resistance and solvent resistance, and air load is apt to be applied by pinholes and voids 5 There is no third distortion associated with this. We first formed a fiber layer of high elasticity fiber on the surface of the diaphragm base material with a honeycomb core and formed an acetate layer on the surface thereof to form defects such as pinholes and boiling of the fiber layer. In this case, it is proposed that the diaphragm made of acetate cellulose is transparent, and that the pinhole of the cloth is transparent. In addition, although there was a possibility that the non-uniformity of the mechanical strength as a structure may arise, these defects can also be eliminated in the present invention. In the speaker diaphragm according to the present invention, a backing material of glass fiber cloth and a high elastic fiber such as carbon fiber), L: 4 j are temporarily put on a surface of the diaphragm S with a honeycomb core. The solution is placed in 1 '% i 4 t l, and heat and pressure is applied to the vibrating plate molding die. By a thermosetting resin such as epoxy resin impregnated in t'a M &, the honeycomb core and the base 4 j of high elastic fiber provided with the backing material layer can be exactly adhered to obtain a structure by these. . Since this structure has a backing layer of glass fiber cloth inside, it has appropriate internal loss. Further, "-2" acetated cellulose is formed on the outermost layer by heat and pressure and is fused to the highly elastic M & fiber base 1i. The film of this acetate cellulose does not stick to the mold and is excellent in releasability, so the moldability is extremely good, and there are no pinholes etc. Fiber I! 1 L of base cloth surface! It is also effective for the I quality, and it is excellent in weather resistance, heat resistance and solvent resistance, and pinholes and the like of the base fabric become invisible due to the presence of the backing material of the glass fiber cloth. An embodiment of a speaker diaphragm according to the present invention will be described together with a method of manufacturing the speaker diaphragm based on FIGS. 1 to 4. FIG. 1 is a cross-sectional view of a cone diaphragm and FIG. 1. 11-05-2019 2 Fig. 3 is a cross-sectional view of another example of the configuration, Fig. 3 is a cross-sectional view of another example of the configuration, and Fig. 4 is a plan view of the arrangement of · direction 1 '+ 1 elastic. . In the figure, reference numeral 1 denotes a cone diaphragm, which is formed of a diaphragm substrate 2 by a honeycomb core, a backing material layer 3 of glass fiber cloth disposed on at least the surface side of the diaphragm substrate 2, and part 1- It comprises a fiber layer 4 of the high elasticity fiber and a film layer 5 of acetate cellulose formed on the surface of the fiber layer 4. FIG. 1 shows an example in which the backing material layer 3 with high glass fiber cloth, high elastic fiber layer 4 and the fill layer 5 are formed only on the surface side of the cone diaphragm 2 and FIG. 2 shows the diaphragm An example is shown in FIG. 3 in which a high elastic P1 fiber layer 4 is formed directly on the back side of the No. 2 material, and J (in FIG. An example is shown in which the M & 層 layer 6 different from the fiber layer 4 on the foot surface side is sunk and the film layer 5 of acetate cellulose is formed on the surface. : AJJ in the fSZ diagram, the fiber layer 4 on the back side in the example may be made to be a paper layer or the same as the fiber on the front side, or it may be a woven or non-woven fabric with other high elasticity fibers different from this In any case, the above-mentioned film layer 5 is formed on the surface of the film because pinholes are easily formed. In the figure, 9 is an edge member. Next, a manufacturing example of a cone diaphragm will be described. First of all, a thin glass fiber cloth is molded into a cone shape by a mold of self-hair at room temperature, and then a one-sided prepreg of tooth fiber impregnated with an epoxy resin of 130 ° C. for 1 hour type is shown in FIG. As shown in ˜ 4D, the glass fiber cloth is divided into four along a cone shape and brought close to 1-of the glass fiber cloth placed on the mold, and heated and pressurized at 50 to 60 ° C for 2 to 3 minutes --- Bias the direction prepreg. The material thus obtained is placed on a paper honeycomb core and heated and pressurized at a temperature of 130 ° C. for 1 hour by an autoclave method or a compression method, using a blood pressure of 0.1 to 3 kg / arm '. In this case, the acetate cellulose solution is evenly coated in advance in a die on the surface side of the diaphragm molding die. When a layer is formed on the surface of the honeycomb core, the end part is a line contact R, but 1; a portion where the prepreg itself is not in conflict with the glass fiber cloth by obtaining about 1% of the heating oil Hami as described. 1-M epoxy resin melts and adheres properly to the honeycomb core to obtain an ideal structure, and a film layer 5 of acetate cellulose is formed on the outermost layer. In this case, since the resin does not penetrate the backing material by the glass fiber cloth, the resin flows uniformly and uniformly in the surface high elastic fiber layer, and it is possible to form a reinforced fiber plastic layer which does not generate pin pole, poled or stripes. it can. In addition, the presence of the backing material of the 1-glass fiber cloth increases the internal loss and has a good composite effect as well as the rigidity of the high elastic fiber. The backing material layer 3, the fiber layer 4 and the film layer 5 were formed on the back surface side of the material 2 in the same manner as in -1-). Further, as shown in FIGS. 2 and 3, it is possible to form the fiber layer 4 and the film layer 5 without the backing material layer 3 on the surface side of the diaphragm (II) and the material 2 as well. As ram layer 4 made of high elastic fiber, 11-05-2019 3 woven fabric or non-woven fabric limited to unidirectional prepreg can be used, and different high elastic fibers can be used on the front side and back side. Also, as shown in Figure 4, carbon fiber! 17 and carbonized carbon; it is possible to mix different kinds of fibers like gsfan. Also, the back side can be made of paper quality. As described above, when different fiber layers are used on the front and back, there is an effect as a composite material, and resonance due to the material can be suppressed. The formation of the fiber layer is not limited to four divisions as shown in FIG. 4. If a large number of mo-woven high elastic fibers are used, an effect rf in bending (deflection) vibration in the radial direction is less likely to occur. In addition, 1. l: As materials other than the glass fiber cloth noted, a desired high price can be obtained even by using a material 1 which is finely meshed, can be thinly formed, and has heat resistance 1 such as 7-amide fiber cloth. When the cone type honeycomb diaphragm (+ f (diameter 200 m + s, voice coil diameter 50 mm) shown in FIG. 3 described above is incorporated into the speaker unit M, air load is applied since defects such as pinholes do not occur. There was no next ↑ or any other person, and the +1 live band was 1-to-1 and the frequency characteristics were t-slip. [Effects of the Invention] According to the speaker diaphragm of the present invention, the structure is formed by the diaphragm base material by the honeycomb core and the fiber layer by the high elastic fiber provided with the backing layer by the glass fiber cloth If the film has high rigidity, it has a suitable internal loss, and a film layer of acetate cellulose is formed on the surface of the fiber m layer, so it has weatherability and surface stability, pinholes, voids, etc. Makes it difficult to apply an air load or generate a third-order distortion associated with it, so that the IIf raw band can be significantly expanded, and a speaker diaphragm of excellent characteristics can be obtained. . Further, according to the manufacturing method of the speaker diaphragm according to the present invention, the backing material of the glass fiber cloth and the base fabric of the high elastic fiber of the carbon fiber are temporarily fixed, and this is used as the diaphragm base by the honeycomb core. Since heat and pressure are applied to the surface of the material with a die for forming a diaphragm plate coated with an acetate cellulose solution, a honeycomb resin is made of thermosetting resin such as epoxy resin which is impregnated in the above-mentioned fibers. A base fabric of high elastic fibers provided with a backing material layer can be adhered to obtain a structure of these, and a film layer of acetate cellulose can be formed on the outermost layer by the above heating and pressing. Since this acetate cellulose film does not adhere to the mold and is excellent in releasability, the 1 & moldability is extremely good, and there are no pinholes, etc., and it is also effective for the modification of the fiber base surface, weatherability As well as being excellent in heat resistance and solvent resistance, pinholes of A & cloth become invisible due to the presence of the backing material of the glass fiber cloth, and the appearance becomes excellent. In this way, it is possible to obtain a honeycomb core root moving plate free of third-order distortion and the like in a cylinder if it is excellent in mechanical strength 1 elasticity and internal loss ff 8 m. 4, IPl width of the drawing IJI drawing shows an example of a speaker diaphragm according to the unborn IJI, FIG. 1 is a fiber layer with 11-05-2019 4 a backing material layer and one side of the film layer laminated honeycomb diaphragm base material ( 2 is a cross-sectional view showing an example in which a fiber layer and a film layer without a backing material layer are provided on the back surface side, and FIG. 3 is different from the fiber layer on the back surface side. Sectional view in the case where there is a material t: tS4m is an f-plane showing an arrangement of the unidirectional high-elasticity fiber. 1: The entire plate moving plate for speakers, 2 :: #A! ! #I plate No, (backing material layer 4 by the material 3 glass lll cloth: fiber layer, 5: film layer. 11-05-2019 5
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