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'Was 4' March '1' a speaker pickled 1 iif + i reference, I57. +, Toka-yu, +4 two ', ""-Address,
Yoshida-cho, Totsuka Ward, Yokohama-shi, Japan Patent Office 715. Patent Document 1:
Japanese Patent Application Laid-Open No. 50-13-8718 "4. 4. Name of the Invention A laminated
diaphragm for a speaker The laminated-moving plate for a speaker having a sand-inch crosssection structure The present invention is characterized by a structure in which a sand-in-place
material is protruded from the outer peripheral edge of the diaphragm to form the protruding
portion as a peripheral support. Speaker laminated diaphragm.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of the peripheral support structure of a laminated diaphragm for Nepeca having a sand-sectioned
cross section; it foams in a cone made of a single material such as metal or thermo-hardening
resin. A conventional loudspeaker diaphragm with sandblasted polymeric material is made of
rubber, leather or woven material coated on its outer periphery with a flexible material. The
supporting body is pasted to the speaker frame via the stator and supported by the stator lever 4.
The first @ is a cross-sectional view of a conventional diaphragm, and the major drawback of this
type of diaphragm made of metal is that the peripheral support should be bonded to the cone.
The reason is that it is not suitable for mass production because it has to rely on handicrafts. Also the sticky side of the support. On the other side the mass can be different, and in the
speaker characteristics such as non-uniformness of adhesive application, the dispersion
temperature Ω, the element. There is a drawback that it can not be avoided. . The object of the
present invention avoids the drawbacks of the prior art described above. 1 ', stabilize the speaker
characteristics, and self-production process. ° · The present invention uses a flexible material
311 as a molecular material to make a cone and a cone made of a rigid material such as metal,
which combines sand pipe titch material and a peripheral support, 4 is thick A metal cone of
0.111 aluminum alloy is molded into EndPage: 1, 5 is a soft foam-polyethylene sandwich
material with a thickness of 2 mx, which protrudes from the outer peripheral edge of the metal
cone, and this portion is molded As a peripheral support, FIG. 3 is a schematic view showing a
method of forming the diaphragm of the present invention. That is, as shown in FIG. 6 (a), a
diaphragm on which metal cone 4 and sandwich member 5 are laminated is attached to forming
die 6a, and as shown in FIG. 3 tb>, sand is formed by forming die 6b. The projecting portion of
the inch material is pressed and heated under a force J to form a peripheral support. In the
present invention, as described above, since the soft foamed polyethylene sanded in a metal cone
doubles as a peripheral support, the step of bonding the support in the conventional method is
not necessary, and the nonuniform bonding is eliminated. Therefore, a speaker with stable
characteristics can be provided. Further, the greatest feature of the present invention is that since
the peripheral support is formed by the method shown in FIG. 6, its forming can be automated
and it is suitable for mass production. Furthermore, another advantage of the present invention is
that, since the sandwich wood is a flexible material, it can provide a damping action to the metal
cone and improve the internal loss as a diaphragm.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a conventional laminated
diaphragm for a speaker, FIG. 2 is a plan view showing one embodiment of a laminated
diaphragm according to the present invention, and FIG. 3 is a diaphragm of the invention. It is a
conceptual diagram showing how to form 6: Peripheral support 4: Metal cone 5: Sun German
wood 6a, 6b: Molding mold I gu / [! l · · · 21 years old! I 73 times-tb) List of attached documents
(1) Description 1 (1) (22 drawings 1-(3) Power of attorney 1 (4) patent application duplicate 1
(5) Application examination request 1 overpass- One- or EndPage: 2
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