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BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, FIG. 1 is a perspective view of an
embodiment of the present invention, FIG. 2 is a perspective view of a second embodiment, and
FIGS. 3 and 4 are FIG. 1 or FIG. It is the front view and the partial side view of the state which
combined the vibration part shown to the magnetic iron part. In the figure, 1 is a drive coil, 2 is a
rod frame, 3 is a diaphragm, 4 and 5 are long sides, 6 is a reinforcing piece, 7 and 8 are inner
walls, 9 is a central portion, 10 is a magnet, 11 is a magnet. The magnetic pole 12 is a spacer, 13
is a support metal, 14.15 is a bolt, and 16 is a notch. Fig. 1-55-Japanese Utility Model Application
Publication No. 51-81725 (2) Fig. 3 Fig. 4-56-
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the reinforcement
of a drive coil frame of a flat speaker (for example, a speaker of the type described in Showa D's
utility model No. 6S37). First, in FIG. 1, the drive coil 1 is wound by a paddle frame and joined to
the moving plate 3. The vc imaging unit is supported so that the long side portion da of the bowl
frame 1 is in a narrow magnetic gap, and the imaging plate 3 is moved by the sound south
current flowing in the coil. Is supposed to shoot. However, its long side part S and S have a weak
strength against bending, so they are co-photographed at the input frequency, and if the input is
large, the central part of the long side part S and S for the horizontal part Touches the magnetic
pole and causes a crack. So, as shown in the nuclear chart. In order to increase the strength
against bending, the opposite side of □□□ 碌 which is bonded to the above-mentioned amoving plate 3 of one long side part D, S by a short bone-shaped reinforcing piece 4 made of
light and high strength material. See Fig. 1 in the longitudinal direction of the long side part j,
between the inner walls 7.1 near the edge of the weir, in the central part of y: □: in the form of a
bridge, which is sufficient, ", 2, L The alarm 118- 'strength is obtained. 2 uses a V-shaped
reinforcing piece 6 in place of the short rod-shaped reinforcing piece shown in FIG. 1. In this
case, the V-shaped central portion 9 is also joined to the imaging plate 3 to It is possible to
increase the strength. The system of FIG. 1 is suitable for mass production because it is simple
and easy to assemble, and the system of FIG. 1 is particularly suitable for high-power speakers
because of its excellent strength. In FIG. 3 and FIG. 5, the oscillating portion having the abovementioned configuration is shown in FIG. 3 and FIG. FIG. 10 is a front view and a partial side view
of a combination of the magnet 6 and the magnet 6. The magnet 1C1 magnetic pole ll, the spacer
lco and the support metal 13 are assembled by a set of brass bolt nuts t * and 13. Note that in
FIG. 6A, / A is a notch for avoiding the contact of the supplementary valve 6 (3). With the
reinforcement according to the present invention, sufficient strength can be obtained with a
small amount of material that can ignore the increase in weight of the movable part, and this
makes it possible to produce a speaker that withstands a large output compared to the effective
area of the moving plate 3 It will be
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description, jps5181725
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