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JPS5595399

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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
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DESCRIPTION JPS5595399
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view of a waterproof
diaphragm used for a conventional speaker, FIG. 2 is a half sectional view of a diaphragm used
for a speaker according to the present invention, and FIG. To radiation. FIG. 4 is a half sectional
view showing an embodiment of the speaker according to the present invention, and FIG. 5 is a
sound pressure-frequency characteristic comparison diagram. 4 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · moving plate, T · · · · · · · · · · · · · · · · · · , 15 ..... Hois coil.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker
provided with a diaphragm which has high waterproofing efficiency, and is excellent in impact
resistance and heat resistance. Heretofore, as a speaker used outdoors or a speaker used
underwater, a diaphragm made of Mylar or a sheet of synthetic paper / lipid film 3 bonded to a
paper sheet 1 as shown in FIG. 1 was used. . Since the adhesive 2 can not be uniformly applied to
the f2 adhesive with the synthetic resin film 3 adhered with the adhesive 2, it becomes unstable
or when it is formed into the shape of a diaphragm, the edge of the edge of the korgen h in When
the film 3 is separated from 1 to 411 and becomes a defective product or a speaker, it causes a
flicker. The sound pressure-frequency characteristics are considerably degraded as shown in FIG.
5 even with this diaphragm and the diaphragm consisting only of mylar. Note that in FIG. 5, the
characteristics are shown in FIG. 5 by the single-dashed line or the Mylar diaphragm, and the
diaphragm or the diaphragm obtained by bonding the film using the adhesive. In the case of the
adhesive containing an adhesive, the sound pressure is lowered because the mass or the pressure
is increased as the speaker diaphragm, and Mylar is not provided with the property to be an
optimal material for Mylar itself or the diaphragm for the speaker. It is thought that it will lead to
the above result. The present invention seeks to eliminate the above-mentioned conventional
drawbacks. Hereinafter, the present invention will be described with reference to FIGS. 2 to 4 of
an embodiment. 3 First of all, the feature of the present invention is that as shown in FIG. 2, as a
diaphragm, a fiber sheet 4 such as paper laminated with a synthetic resin having little water
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permeability, for example, a polyethylene resin film 6 As a material, which is irradiated with an
electronic sword is heated and pressed to form a diaphragm 6. The raw material is cut out by
feeding a molten resin onto a fiber sheet 4 while extruding and forming it into a notebook shape,
and at that time, the fiber sheet 4 and the film 6 are bonded and bonded together. Then, the
electron beam is irradiated with the electron beam so that the polyethylene film 6 has a
crosslinked structure, which is resistant to chemicals, stress cracking and impact. It is because
heat resistance can be remarkably improved. The thermal contraction rate changes as shown in
FIG. 3 depending on the intensity of the electron beam (Megaradian), and it is more effective to
irradiate a strong electron beam of 6 to 10 megaradian. This causes the film 5 to be tacky at less
than 6 megaradians and causes difficulty in moldability, and at 10 megaradians or more, the
physical properties of the fiber sheet 4 are significantly degraded or the film 6 loses elongation
and can not be formed. It is due to.
Such a diaphragm 6 is incorporated as shown in FIG. 4 to be a speaker. In the fourth IEI, 7 is a
field portion, and this field s7 is constituted by a plate 9 provided with a center pole 8, a ringshaped magnet 10, and a ring-shaped upper plate 11 as well. A magnetic gap 12 formed between
the top plate 11 and the center pole 8 is formed. A frame 13 is connected to the field portion 7,
and an upper to lower self-supporting plate 6 is attached to the periphery of the frame 13 via a
rubber gasket 14 in the reverse direction. Join the upper end of the 16 and dan the middle part!
A dust cap 17 made of a synthetic resin such as Mylar is bonded to the central portion of the
moving plate 6, held at 1e. In the speaker of the present invention configured as described above,
the image pickup plate is completely waterproof, and the problem of peeling at the corrugation
at the edge is hardly 6 and light in mass and sound pressure is reduced. Will stop at all. Since the
laminate of this synthetic resin having no water permeability is irradiated with an electron beam,
chemical resistance, stress crack resistance, impact resistance and heat resistance are remarkably
improved, especially heat resistance. In this case, it does not flow even if it is heated to the melt,
has rubber-like elasticity, facilitates diaphragm formation, and reduces deformation, as indicated
by the solid line in FIG. The habit is also extremely stable and is of great practical value.
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