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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of the diaphragm of the
present invention, and FIG. 2 is a partial sectional view of the diaphragm of the present invention.
1.2 is a molding, 3 is an adhesive, 4 is a cork particle, 5 is a thermosetting resin.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction
of an imaging plate for a loudspeaker. Conventionally, a paper fiber diaphragm is generally used
as a material having a large Young's modulus and a large loss of inside + t of a loudspeaker
moving plate, but it is required as a diaphragm for a loudspeaker; 'if! If the loss is to be increased,
the Young's modulus of the diaphragm itself is low, and the extension of the high region in the
frequency characteristic G of the loudspeaker is added. ! Light metals such as aluminum,
duralumin 7, and titanium have high Young's modulus compared to paper fiber C as M @ plate
materials, but they have large specific gravity and little vibration loss, so they do not extend to
paper fiber, ... , P7z; 2い。 On the other hand, cork is as small as 0.15 to 0.30 g / c ++ 1 as
compared to paper paper 0, and has a large vibration loss but a low Young's modulus so that
paper fiber Q does not reach as well. The present invention was devised to eliminate the
disadvantages of L, and it will be described with reference to the embodiment shown in the
drawing G, the state shown in FIG. .0 m of cork particle 4 is mixed with an appropriate amount of
thermosetting 1 raw resin 5 such as phenol and epoxy, heated and heat-cured and tJ1 heat
cured, for example, molded into a dome shape or frustoconical shape to obtain a molded article 1
To manufacture. On the other hand, the molded body 2 is manufactured by, for example, domed
or frusto-conical O-molding with a metal foil such as aluminum, duralumin, titanium or the like.
Alternatively, the molded body 2 is concentrically bonded to the front surface or the back surface
or both surfaces of the base body 1 with the adhesive agent 11) ′ ′ agent 3 such as a synthetic
rubber, etc. to form a vibrator support plate for a dispenser. FIG. 2 is a partial sectional view
thereof, in which the cork particles 4 and the thermosetting resin 1 are mixed to form a molded
product l, and the surface (the adhesive 3 is applied to the molded DJ 2 of metal foil) ing. Like
this (It was made! Curved plate] metal foil]] high yan 3 率 rate of cork, small ratio 桟 of cork,
large vibration loss is combined, has high rigidity, is light, cork vibration loss heat sink, harmful
in high range Vibration is absorbed to obtain a diaphragm having a wide band and good
frequency characteristics. In the present invention, as described above, by pasting the molded
body 1 of cork and the molded body 2 of metal foil with the adhesive 3, the conventional internal
Q is not large, the internal loss is large, and the direction of the Young's modulus A high quality f
diaphragm for the market is obtained, and the high range is extended compared to the frequency
disclosed by the paper fiber diaphragm, and the frequency range of the high band is small, and
the frequency is almost flat. Because it has the characteristics, the reproduction sound quality is
made to leap dramatically. Moreover, 1 v of gold 1 · 4 foil and variously changing the thickness
of the molded body 1 of cork and combining them (from two, it is possible to produce many
kinds of diaphragms such as for full range, for middle height, for high sound etc. It is 4 east with
a wide range of application.
4. Simple explanation for i4 direction Fig. 1 is a block diagram of a working plate of the present
invention Fig. 2 is a partial cross-sectional view 4 of the present invention 振 @ 2 of the molding
3 is an adhesive 4 is a cork particle 5 is a thermosetting I main resin utility model registration
applicant Onkyo Co., Ltd. Arrow / l Pl 6 λ 1 ^ 1 A 8 ”3”
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