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JPS593698

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DESCRIPTION JPS593698
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a cross-sectional view showing a conventional example of a speaker, FIG. 2 is a crosssectional view of a speaker according to the present invention, and FIG. 3 is composed of a
movable iron 8 and a diaphragm 9 in FIG. FIG. 4 is a view showing the relationship between the
restoring force of the diaphragm and the suction force applied to the movable iron piece 8 from
the permanent magnet 12 and the distance between the movable iron piece 8 and the magnetic
core 14; FIG. It is. · · · · · · · · · · · Movable iron piece, 2, 9 · · · diaphragm body, 3 ° 10 · · · support
frame, 4.11 · · · core, 5.12 · · · permanent magnet, 6, 13: coil, 7.14: magnetic core, 15: spacer, 16:
guide portion, A: upper surface position of magnetic core 14, B: upper surface position of spacer
15, C .. -Position of the surface of the movable iron piece 8 on the magnetic core 14 side when
the restoring force of the diaphragm and the attraction force from the permanent magnet 12 to
the movable iron piece 8 are balanced, D: movable iron piece 8 without the permanent magnet
12 Position of the surface on the side of the magnetic core 14 of E, E: displacement within the
gap of the diaphragm to restoring force characteristics, F: attraction characteristics within the
distance of the permanent magnet 12, G: no permanent magnet 12 That indicates when the
restoring force and suction force of the diaphragm are O, H ... that the vibrating plate had the
restoring force and suction force in the presence of the permanent magnet 12 point.
03-05-2019
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