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JPS6267998

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DESCRIPTION JPS6267998
[0001]
FIELD OF THE INVENTION The present invention relates to a method of manufacturing a conical
acoustic diaphragm used for a speaker or the like. 2. Prior Art A conventional method of
manufacturing an acoustic diaphragm is as shown in FIG. That is, with the diaphragm material 1
on the plane interposed between the concave mold 2 and the convex mold 3 having a conical
shape, the vibration base for sound 2 has been manufactured. Problems to be solved by the
invention However, such a method requires special convex molds and concave molds, and there
is a problem that the cost becomes high 01 The shape of the acoustic diaphragm is changed In
the case where it is overdue, there is a problem that it is not possible to easily change the shape
of the acoustic diaphragm, because it is necessary to remodel the convex mold and the concave
mold or to change the shape according to the shape change. Therefore, the present invention
provides a method of manufacturing an acoustic diaphragm with a simple jig without using a
dedicated mold, which is inexpensive in cost, and the shape of the acoustic diaphragm is
changed. Means for solving the O problem, which is also easy to do, and the technical means of
the present invention for solving the problem -1- fix the periphery of the diaphragm material on
a plane, and By properly pressing down, a conical acoustic diaphragm is produced. O Action The
action by this technical means is as follows. That is, the flat diaphragm material whose periphery
is fixed is softened by a method such as heating, and in this state, the central diaphragm is held
down by a suitable amount of a rod of a suitable diameter to form a flat diaphragm. The material
can be stretched to produce conical acoustic vibrations. Embodiments of the present invention
will be described below with reference to the attached drawings. In FIG. 1, the periphery of the
diaphragm material 11 is fixed by a fixing jig 12, and the diaphragm material 11 is softened by
heating or the like. Next, the central portion is pressed with a rod jig 13 by a necessary amount,
molded into a conical shape, and cooled in this state, whereby the conical acoustic diaphragm 14
can be manufactured. . Further, the change of the shape of the manufactured diaphragm can be
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1
realized extremely easily by changing the shape of the fixing jig, changing the shape of the bar
jig, changing the shape of the bar jig, and changing the pressing amount of the bar jig. is there.
Effects of the Invention As described above, according to the present invention, a cone-shaped
acoustic diaphragm can be manufactured with only a simple jig and no dedicated mold, and the
change of the shape, the diameter change of the fixing jig, the rod It can be implemented very
easily by changing the diameter of the jig and increasing or decreasing the pressing amount of
the bar jig. Therefore, significant cost reduction, development period, and significant reduction of
jig (mold) completion period become possible.
[0002]
Brief description of the drawings
[0003]
1 (a) and 1 (b) are cross-sectional views before and after molding according to an embodiment of
the present invention, and FIG. 2 is a cross-sectional view showing a conventional method of
manufacturing an acoustic diaphragm.
1 и и и Diaphragm material, 2 и и и Concave mold, 3 и и и Convex mold, 11 и и и Diaphragm material, 12
и и и и Fixing jig, 13 ииииии Rod jig, 14 ииииииии Vibration board for sound.
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