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Brief description of the drawings
The first is a longitudinal sectional view showing the structure of a conventional cone-shaped
speaker, and FIGS. 2a and 2b are a plan view and a side view of a diaphragm showing an
embodiment of the present invention, and FIGS. FIG. 18 is a plan view and a side view showing
another embodiment of the present invention. In the figure, -1 is a diaphragm, 2 is a dust cap, 3
is a voice coil, 4 is a voice coil bobbin, 5 is an edge, 6 is a spider, 7 is a frame, 8 is a magnetic
circuit portion, and 1) is a foam material. In the drawings, the same reference numerals indicate
the same or corresponding parts.