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JPS5436922

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DESCRIPTION JPS5436922
Specification 1, Title 2 of the Invention, Claimed Scope (1) A sponge-like metal formed into the
shape of a diaphragm for a speaker, and a part of the sponge-like metal surface being allowed to
penetrate into the bubbles, A speaker diaphragm comprising: and a foil-like filler material
laminated. (2) The speaker diaphragm 0 according to the preceding paragraph, characterized in
that a sheet adhesive is interposed between the sponge-like metal and the foil-like stopper
material.
Speaker diaphragm
6. Detailed Description of the Invention The present invention relates to a loudspeaker
diaphragm comprising a laminated structure of a foil-like brace and a sponge-like metal. A
conventional loudspeaker diaphragm will be described with reference to FIG. 1 and FIG. The
synthetic resin sheet 1 is welded on the surface of the first garden U and the sponge-like metal 2
as a foil-like filler. However, in the bath-wearing company, the bonding area between the spongelike metal 2 and the synthetic resin sheet 1 is small, and there is a disadvantage that the surface
is damaged or damaged. FIG. 2 shows another conventional example in which a sponge-like metal
2 and a metal foil 3 as a sealing material are adhered with a heat-welding type sheet-like
adhesive 4. Also in this prior art example, there is a disadvantage that the bonding area is small
and peeling off and collapsing. The object of the present invention, in view of the abovementioned disadvantages of the prior art, is to peel off the sponge-like metal and the foil-like
filler. It is an object of the present invention to provide a speaker diaphragm in which the abovementioned both are strongly coupled. In order to achieve the above object, the present invention
utilizes a pressure difference of fluid to simultaneously form a laminate composed of a foil-like
filler material and a sponge-like metal body into the shape of a speaker diaphragm and at the
same time a foil-like filler Material is made to penetrate into a part of the open cells of the
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sponge-like metal, and the bond between the sponge-like metal and the foil-like filler is further
strengthened. 1 One embodiment of the present invention will be described with reference to
FIG. Do. EndPage: As shown in FIG. 3, a planar shape having a sponge-like metal 2 facing the
mold 7 processed to have a recess formed in the shape of a speaker diaphragm, and a through
hole 6A at the central portion The foil-like filler material 5 is placed facing the mold 6 and these
are stacked in two layers. Next, air pressurized as shown by arrow 8 is made to flow from the
upper part of the forming m 6 through the through hole 6A (or air is made to flow out after
being decompressed as shown by arrow 8), and the sponge metal 2 and the foil sealant 5 Is
pressed into the recess of the forming die 7 to form the two-layered laminate into a speaker
diaphragm shape. In this case, if necessary, the molds 6 and 7 can be raised to a predetermined
temperature, and the sponge metal 2 and the foil sealant 5 can be stretched into a speaker
diaphragm shape. FIG. 4 is an enlarged cross-sectional view of the speaker imaging plate of the
present invention molded in FIG. A large number of open cells 9 are present in the spongy metal
2. As described in FIG. 3, when the laminate is pressure-contacted with air, the foil-like filler 5
faces the foil-like filler 5 and penetrates into the next air bubbles 9, and the sponge-like metal 2
and the foil-like The bond with the stopper 5 becomes strong. As described above, according to
the present invention, it is possible to form a laminate of a foil-like filler material and a spongelike metal on a speaker imaging plate and simultaneously make the foil-like filler material a part
of the open cells of the sponge-like metal. Since it can be made to penetrate, there is an effect
that the foil-like filler material and the sponge-like metal are firmly bonded to each other and
peeled off.
In the example of the present invention, the two-layer structure of the foil-like blocking agent and
the sponge-like metal has been described, but the sheet-like adhesive for further achieving the
bonding effect is the foil-like sticking agent and the sponge-like metal. It is needless to say that
the present invention can be applied to a speaker diaphragm of a three-layer structure
sandwiched between the two.
4. Brief description of the drawings FIGS. 1 and 2 are cross-sectional views showing a
conventional speaker diaphragm, FIG. 3 is a cross-sectional view of a manufacturing apparatus
for a speaker moving plate of the present invention, and FIG. FIG. 6 is an enlarged cross-sectional
view of the speaker diaphragm of FIG. 2I sponge-like metal 5 foil-like filler material 9: spongelike metal open cell P + 0 years 2 Figure EndPage: 2 years 3Z \ 4Z EndPage to: 3
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