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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an
embodiment of the present invention, and FIG. 2 is a diagram showing the sound pressure
frequency characteristic together with a conventional example. 10 иииии Main part of cone, 11
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a cone type loudspeaker, in particular its cone (diaphragm). In the cone type speaker, there is
a book in which a small thick part is provided on the front slope of the cone paper and the public
slope is provided to improve the frequency characteristic and the sound loss conventionally, but
the mechanical internal loss is small. The effect is thin, and this influence causes a characteristic
movement due to a transient movement caused by the cone, which deteriorates the sound
quality, and the rigidity of the cone does not increase and bending interlocking easily occurs, and
the frequency near the high cut This causes the generation of sharp resonance peaks, and also
deteriorates the sound pressure frequency characteristics. (1) Revised t-21; -y-; The present
invention seeks to obtain a cone-shaped loudspeaker without the above-mentioned drawbacks.
The present invention is, as shown in FIG. 1, in particular, an annular or partially integrally
formed on both front and back slopes of the cone main portion Lll and providing a thick portion
U ridge 0 In (1): yoke, (2) center pole, (3) permanent magnet, (4) play), +51 company frame, +61
voice coil, (7) spider, (8) dust cap , (9) is an edge. And the cone according to the present
invention shows the main rigidity against bending movement, which partially breaks up the
mechanical internal loss due to the symmetrical thick part, and suppresses the transient vibration
and the natural sound. In addition, sharp resonance peaks generated at frequencies near the high
cut can be reduced as compared with the conventional one as shown by solid lines in FIG. As
described above, according to the present invention, the simple W-place can obtain a good (2)
tone-type loudspeaker without a sharp resonance peak.
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