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Brief description of the drawings
FIG. 1 is a perspective view showing a conventional voice coil, and FIG. 2 is a sectional view of
the voice coil mounted on a diaphragm, and FIG. 3 is a perspective view of the voice coil
according to the present invention. 49 of the drawing is a manufacturing process explanatory
view of the bobbin of the voice coil, and FIG. 5 is a cross-sectional view showing the attached
state of the voice coil and the diaphragm. DESCRIPTION OF SYMBOLS 1 ... Bobbin 2, 2 ... return
cylinder part, 3 ... diaphragm, 4 ... coil.