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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of
the speaker of the present invention, and FIG. 2 is a frequency characteristic diagram of the
speaker. 1 ...... speaker bow managing, 6 ...... voice coil, yl foam, 8 ...... main cone paper, 9 ...... sub
cone paper, a · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Main cone outer edge. Fig. 1-83Japanese Utility Model Sho 48-67 735 (2 Jl softened (H yo)-84 =
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an 11-speaker, in
particular, a thin type; suitable as a speaker, stable in terms of strength and no distortion, and
sufficient reproduction even in high-pitched portions. The aim is to obtain a loudspeaker that
makes it possible. Hereinafter, the present invention will be described with reference to the
embodiment shown in the drawings.-J'1 Fig. 1t * "e-f 'vws surface view 16-1 ((1) ao-Qi 7'> c-n
speaker housings, 2 is 3 is a ferrite magnet, 4 is a top plate, 5 is a damper, 6 is a voice coil foam,
7 is a dust cap, 8 is a main cone paper, and 9 is a sub cone paper. The above-mentioned main
cone paper 8 has a central end a attached to the voice coil form 6 as shown, substantially the
same as an outer end attached to the speaker housing 1 (the central end a is slightly higher in
the figure). So that the central end a of the main cone paper 8 is bent inward so that the speaker
is very thin. As can be seen in the figure, the use of such a main cone paper 8 makes it possible,
in particular, to the central part, that is to say with the shape in which the central end a of the
main cone paper 8 is bent inwards. The voice coil foam 6 to be attached is short and therefore
stable in terms of strength, and there is no risk of contact with the center or abnormal shooting,
and suppression of distortion (2) AR-67735 The benefit of -03 There is. However, since this main
cone paper 8 is extremely thin compared to the conventional conical cone paper in terms of its
shape, it attenuates sharply after passing the piston zone due to its structure, resulting in high
frequencies. There is a drawback that it becomes difficult to reproduce sufficiently with
acupuncture and can be reproduced only up to the cutoff frequency Lc as seen in the speaker
characteristic diagram shown in FIG. In order to solve this problem, it may be considered to
reduce the aperture of the speaker so that the high range can be reproduced. In this case,
however, the result is that the low band is insufficient, and full band reproduction is difficult. .
Therefore, in order to eliminate the above-mentioned drawbacks, the present invention has
another small diameter attached to the voice coil foam side at both centers of the above main
cone paper 8, that is, at the center end a of the main cone paper 8. The sub-corn paper 9 is
disposed, and this sub-corn paper 9 is used to fully compensate the insufficient high-pitched
portion for reproduction (3 + AR-67735-04).
Therefore, when the sub-corn paper 9 is not attached, reproduction can only be performed up to
the cut-off frequency fc as described above, but by attaching this, the reproduction is performed
to a sufficiently high frequency as shown by the solid line in FIG. It will be possible to use it as a
full band speaker with this individual speaker. Since the present invention is configured as
described above, the entire speaker is thin, and the strength is stable, there is no possibility of
distortion, and it is possible to sufficiently reproduce even in the high sound area. There is.
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