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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a cross-sectional view showing a porous
metal body as a material of the present invention, FIG. 2B is a plan view of the same, and FIG. 2A
is a perspective view showing a diaphragm material piece used in the present invention. FIG. 3 is
a plan view of the mouth, FIG. 3 is a perspective view showing an embodiment of the present
invention. Explanation of main figure numbers, 1 ..... Metal porous body, 2 ..... Aluminum foil, 3 ....
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of the Subey Am moving plate, and it is an object of the present invention to provide a flat
melting plate made of a porous metal body for holding. It is known that flat-moving plates can
provide good acoustic characteristics. However, since the rigidity of a hard paper stick
conventionally used generally as a diaphragm system material is low, flat 1f IJ! ! The metal
diaphragm, which can not be used as a moving plate, and was conventionally used as a
diaphragm system material for high fF @ speakers, has an increase of one enemy when used for a
large aperture flat speaker, and therefore, One shot of the new 7 / σ-'2 "2 surface-spindle plate
material was aspired for -C. The present invention has been made in view of the above-mentioned
point, and an embodiment Kft of the present invention will be described below with reference to
the drawings. Fig. 1 (a) is a cross-sectional view of the diaphragm material used in the present J1
plan, Fig. 1 (a cut shows the plane thereof, and (1) is a waterfall porous body made of nickel, (2 )
Is an aluminum foil for sealing the pores of the metal porous body (1) by -71i. The 14-hole
porous body has been conventionally used as a cone-shaped diaphragm because it has high
inertia and is wrinkled. Thus, since the cone-shaped diaphragm is a cone-shaped member, the
rigidity of the material itself is further enhanced. Therefore, it is necessary to make extra work
(only processing a single metal porous body into a cone-shaped shape) So, I could get enough
rigidity. However, in the case where the metal porous body is used as a flat low-moving plate,
there is a danger that split vibration and the like may be generated if the single metal porous
body is used without sufficiently increasing the @ property. Therefore, in the present invention,
both @ faces (3) of the diaphragm material consisting of the porous metal body (1) and the
aluminum pain (2) are shown in FIG. As shown in 6 of 2- (b) in Fig. 2 (b), the diaphragm material
is VC processed so that the plane of the material of the diaphragm is substantially fan-shaped to
form a diaphragm material piece, and a plurality of the material pieces are made radially! !
1’! Then, a diaphragm is formed by bonding the m- (3) members facing each other in the xJ
direction with an adhesive or the like. FIG. 6 is a perspective view showing the back surface of
the completed diaphragm. Fig. 6 shows how to attach a piece of diaphragm material of 6 ·
country V plate to form a diaphragm from this piece, and the rigidity of the diaphragm is
dramatically increased because 1iijf3) bent vertically is reinforced. It has the advantage of being
able to be enhanced. The diaphragm has an inner hole (4) into which a nail coil bobbin is
inserted. The diameter of the curved inner portion JLt 41 can be set to a predetermined value by
processing so that the inner surface (5) of the twenty-first diaphragm-based material piece has a
curvature of the liver f.
The diameter of the diaphragm is 5IIJ2. It is determined by processing the outside iij (61 of <a
piece of the diaphragm-based material piece to have a predetermined curvature and setting the
diameter of the imaging plate main material piece to a predetermined value). According to the
present invention, k, as described above, process and bond the moving plate system material.
Besides, since the moving plate can be produced 4, an inexpensive flat diaphragm can be
obtained. Further, since the metal porous body has a good heat dissipation effect, a speaker
having a high heat dissipation effect can be provided by integrally attaching a voice coil bobbin
(for example, a metal voice coil bobbin) having high thermal conductivity to the lii base plate. It is
Okawa-like that has many advantages, such as being able to create the basic performance of the
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