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JPS60181988

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DESCRIPTION JPS60181988
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a side sectional view showing a conventional speaker diaphragm made of foamed resin,
FIG. 2 is a side sectional view of one embodiment of the present invention, and FIG. 3 is a
perspective view of another embodiment of the present invention. FIG. 4 is a diagram showing
frequency characteristics of the speaker diaphragm of the embodiment shown in FIG. 2 and the
conventional example of FIG. 3 ...... voice coil, 11, 13 ...... foamed synthetic speaker diaphragm
made of resin, 12 ...... coating layer, 16 ...... reinforcing ribs.
11-05-2019
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