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 JPS55173691 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway plan view showing an acoustic diaphragm according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the acoustic diaphragm, and FIG. 3 and FIG. It is a longitudinal cross-sectional view which shows the usage example of the acoustic diaphragm of this invention, respectively. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · skin material i3 · · · · · · · · acoustic diaphragm. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acoustic vibration diaphragm used for sound Wk 柩 such as a speaker, headphones, and microphone, and more particularly to an acoustic vibration diaphragm having a honeycomb core as a core material. Recently, as an imaging plate in a speaker cabinet, a honeycomb core made of metal or polymer material is used as a core material, and a skin material is attached to the surface of the core material, and it is used now. There is. This type of diaphragm rainbow core material has a honeycomb structure (honeycomb structure). / (1) "˜ IF, I can make shimmy" "J [, and also because the apparent density と し て as a whole is low specific modulus, ie elasticity 4 E and density のIt is possible to obtain an excellent bridge construction as an acoustic diaphragm, for example, it is possible to obtain good frequency characteristics by increasing the ratio Vρ and to appropriately increase the internal loss for bridge construction and the like. Are known. However, in spite of the fact that this type of acoustic diaphragm of the prior art is structurally excellent, it is in fact the case that it is not sufficiently satisfactory in practice. That is, in this type of acoustic diaphragm, the characteristics of the skin material greatly affect the characteristics of the acoustic diaphragm as a whole, but all the skin materials used in the conventional acoustic diaphragm have advantages and disadvantages, It was difficult to be satisfied in all respects. For example, it is common to use a paper-made film such as paper made from paper made from a fiber such as wood a4 rug or a metal foil such as an aluminum foil as a skin material in a conventional acoustic diaphragm of this type. Since the paper sheet ore elastic modulus E of the paperboard is low, the efficiency is low, and the specific elastic modulus (2): the core is low, and 11-05-2019 1 good frequency characteristics can not be obtained, and the metal foil has an elastic modulus E Is relatively high and can increase the specific elastic modulus, but the internal loss is extremely small, so although the honeycomb structure can increase the internal loss structurally, the tone in the high range is actually There is a problem that tends to be exciting. Furthermore, carbon fiber reinforced plastic is also proposed as a skin material, but although carbon fiber reinforced plastic has a large specific elasticity of 4%, it is not necessarily sufficient in terms of specific strength, and there is a drawback that the manufacturing cost is high . This invention was made in view of the above-mentioned circumstances, and a composite material in which a woven fabric of aromatic polyamide fiber having a large specific elastic modulus and a large specific strength and an excessively large internal loss is reinforced by a thermosetting resin is used as a skin material The present invention provides an acoustic vibration plate which is used to form a honeycomb plate of a vibration plate, and which is acoustically excellent in terms of four mechanically and inexpensively. The acoustic diaphragm of this invention will be described in detail below based on the drawings. (3)] 硼: knack (j-ζ ′, '' FIG. 1 and FIG. 2 is a book showing an example of the acoustic diaphragm according to the present invention, and in FIG. 1 and FIG. A core material 1 is a honeycomb core made of a thin film of a high polymer material obtained by dipping a phenolic resin into a metal of metal alloy or Z ↓ / mid fiber (for example, Dupont's trade name North). The thermosetting resin such as epoxy resin, unsaturated 4-polyester resin, phenol resin, etc. on woven fabric consisting of poly-rubendemi P fiber, poly-p-phenylene-terephthalamide fiber aromatic polyamide fiber on both front and back sides of this core material l The acoustic diaphragm 3 is constructed by sticking skin materials 2 and 2 'formed by immersing and solidifying resin. The poly-p-benzomid fibers and the L-type 1 can be used, for example, a cocoon known under the trade name "Keb 9" made by Denipon of the United States, and also a polyno 4 'luff enylene terephthalamide fiber and L? , $ Is also a brand name made in the United States of America Des Inc. [Fee. 12% using what is known as BJ. FIG. 3 shows an example in which the acoustic diaphragm of the present invention is used as a cone-type (4) 1.1 single force K 11 l II, and the diaphragm 3 is formed to have a cone shape. The outer peripheral portion L is supported on the circular end of an edge member 4 made of urethane foam and vinyl chloride, and this edge member 4 is fixed to the open end of the cone-shaped frame 6 by an annular gasket 5 . FIG. 4 shows an example in which the sound vibration subplate according to the present invention is applied to a flat speaker or a loudspeaker P phone, wherein the diaphragm 3 is made flat and its outer peripheral edge is an edge A fixed amount is fixed to the inner end of the member 4 C, and the outer end of the edge member 4 is fixed to the open end of the frame 6 by an annular gasket 5. Next, the aromatic 4-rear used in the skin material of the sound imaging plate of this invention is shown in the table below in comparison with other fibers, i.e., glass fibers and aggregate fibers. (5) i tap j- \, jJ tensile ferroelastic modulus ratio strength ratio elastic density 繊 維 fiber degree 'E (M) "" 芳香 aromatic-noamide 12JO 02801, 4519318 J59 ˜ (Kepler 49) 19J 56 glass fiber 245- ( E-glass) 280 735 ° 254289350-′ ′ 248 14 · 11-339-(S-glass) & 00019.76 carbon fiber 0 L r 11-05-2019 2 T 300 A) 250 2 ′ ′ 001 001. As apparent from the above, since the aromatic polyamide fiber has a low density ρ and a high tensile strength σ and a high elasticity 4E, the specific elastic modulus ip'vp and the specific strength 1 / d are both high on average, especially The specific strength is much better than other fibers. The skin material obtained by impregnating and solidifying the thermosetting resin in a woven fabric of aromatic polyamide fiber once has a high specific modulus V 、 and a high specific strength V #. (6) · 4y · Shoichi 34J 1 · · In the above example, the skin material 2.2 'is adhered to both the front and back sides of the core material 1 consisting of a honeycomb core, but in some cases the core material l In the case where the skin material 2 is stuck on only one side of the skin, and also when the skin materials 2 and 2 'are stuck on both the front and back sides of the core material 1, is it aromatic as one of the skin materials? A thermosetting resin may be impregnated into a woven fabric of liamide fiber, and the resin may be impregnated and solidified, and a thin film of another material such as a paper skin material may be used as the other skin material. As clearly shown in the above description, the acoustic diaphragm of this invention has a honeycomb structure, and as a skin material bonded to at least one surface of a core material comprising a honeycomb core, the strength, elasticity 4E Since the woven fabric of an aromatic polyamide fiber having a high specific elastic modulus Vρ is further reinforced with a thermosetting resin, the elastic diaphragm E as a whole of the acoustic diaphragm of this invention is also high, and Efficiency is high, and the specific elastic modulus Vρ as a whole is high, so that the frequency characteristics are excellent, and the elongation in the high-pitched band is particularly mourning, and the strength as a whole is large. It has a small risk of forming and high resistance to input, and the skin material can be obtained only by immersing the thermosetting resin in a woven fabric of pre-woven aromatic-liamide fiber, so that its production is possible. Volume Der sheet, thus the effect of energization of the relatively inexpensive cost of the entire acoustic diaphragm is obtained. 11-05-2019 3
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