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JPS5485715

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DESCRIPTION JPS5485715
Description 1, title of the invention
Speaker diaphragm
The present invention relates to a speaker diaphragm formed by fixing a uniform fine siliceous
granular foam having independent and communicating cells to pulp fibers, and providing a
lightweight one having high specific elasticity. In general, the characteristic required for the
speaker diaphragm is that the a density be as small as possible. b The Young's modulus should
be as large as possible. C. The internal loss is moderately large. ???? It has been tried to use
a hollow foam obtained from lightweight and rigid preferable foamed resin and mineral as a
material for obtaining a heavy force diaphragm satisfying the above characteristics. However,
since the foamed resin and the hollow foam float lower than the packing density of water, they
are fixed to the pulp fiber, and the foam is not uniformly dispersed at the time of paper making,
and the speaker diaphragm has desired characteristics. It was something that could not be
obtained. The present invention eliminates the above-mentioned conventional drawbacks. That is,
the present invention relates to a vibrating vibrator for a speaker which is lightweight and has
excellent rigidity by forming a siliceous granular foam which is very light and has independent
and communicating cells which are submerged in water and fixed to pulp fibers. An embodiment
of the present invention will be described below with reference to FIG. 1 and FIG. 2. Reference
numeral 1 denotes a speaker diaphragm formed in a cone shape. The speaker diaphragm 1 is
made of pulp fibers 2 and siliceous granular foam. It is composed of three. The speaker
diaphragm 1 as described above is used in a papermaking machine EndPage: 1-], after beating
the pulp fibers 2 and dispersing it in water, and subsequently, a siliceous granular foam within a
range of 20% by weight based on 2 tlc of pulp fibers Put 3 into the water. Since the siliceous
granular foam 3 has uniform and fine cells of about 10 to 100 Zz in diameter, separated by a
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1
thin partition of several ? in thickness, water gradually penetrates into the interior and finally
sinks in water, In this way, the pulp fiber 2 and the siliceous granular foam 3 are stirred in a
precipitated state, and the rubber latex is poured into this to fix the siliceous granular foam 3 to
the pulp fiber 2, and this is made into paper The water infiltrated into the siliceous granular foam
3 is evaporated by heating and pressing for several minutes at a temperature of 180 to 200 ░
C., so that the paper made into paper on rice is evaporated and completely completely separated.
And communicating cells are formed, so that a lightweight and rigid layered moving plate for a
speaker can be obtained according to the above-described method, the speaker when the pulp
fiber 2 is mixed with the oral cavity siliceous granular foam 3 at a weight of 1 o Diaphragm 1 ,
The physical properties of the conventional by only pulp fibers' Ru speaker diaphragm below.
'1 ++ 1 Next, an example in which the above-described speaker diaphragm 1 is configured as a
speaker as shown in FIG. 3 will be described. 4 is a field section constituted by a plate 6 provided
with a center pole 5 and a ring-shaped magnetic plate 7.1llr (a ring-shaped upper plate 8), to
which a frame 9 is connected A diaphragm 1 having a force 1 and a free edge 11 together with a
gasket 1o is fixed to a peripheral portion of the frame 9 at t12. A voice coil 12 is coupled to a
central portion of the diaphragm 1 and an intermediate portion of the voice coil 12 The lower
portion of the voice coil 12 is inserted into the magnetic gap 14 of the field section 4 without
eccentricity, and the dust cap 15 is attached to the upper surface of the central portion of the
diaphragm 1. And constitute a speaker. The characteristics of the speaker configured in this way
were measured. The result is FIG. In FIG. 4, the solid line represents the speaker diaphragm of the
present invention, and the broken line represents the characteristics of the conventional speaker
diaphragm. The present invention is extremely stable even in the high region. The growth of high
frequency reproduction will also be measured. As described above, the speaker diaphragm of the
present invention is light and stiff, and can stabilize and improve the characteristic surface, and
the siliceous granular foam has a large surface area, and since it sinks in water, the pulp is surely
pulped The fibers can be fixed, uniformly dispersed, stable in quality, and have high industrial
value.
4. Brief description of the drawings. FIG. 1 is a half sectional view showing one embodiment of
the speaker diaphragm of the present invention, FIG. 2 is an enlarged sectional view of the same
part, and FIG. 3 is a speaker using the diaphragm. FIG. 4 is a sound pressure frequency
characteristic diagram of the same speaker and a conventional speaker. 2 иииииииииииииииииииииииииииииииииииииии
Silicaceous granular foam. Name of agent Attorney Nakao Toshio has 1 person EndPage: 2 Figure
1 3rd ward 1! De-taste EndPage: ?
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