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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an example of a
speaker according to the present invention. 1・・・・・・センターポール、2・・・・・・プ
レート、3・・・UEコーン、10・・・・・・エッジ。 f−67−
DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improved construction
of the speaker cone. There are various factors that determine the playback frequency of the
speaker, such as the aperture, depth, diameter of voice coil, and material of the vibrating thread
of the speaker, but for one cone, the frequency that can be played is the shape of the cone and
Much dependent on the material. % High-frequency S2 · 2 playback Fi! The main factors that
determine the I wave number are the stiffness sh at the top of the cone and the equivalent mass
m of the vibration system. である。 In the case of ordinary corn paper, the top material stiffness
Sh is the main component of paper and the upper diaphragm stiffness Sh is high, and in the case
of a metal diaphragm etc., the high frequency range resonance frequency k is increased by
increasing equivalent mass no or vice versa Under the present circumstances, it is difficult for
people to lose. This device is designed to make it possible to easily increase or decrease the high
frequency reproduction frequency with a cone of the same shape as that of the conventional
cone by making the above mentioned stiffness and equivalent capacity tilIIllI, so that the holding
reproduction frequency ranges are different The speaker has a cone formed by adhesively
bonding parts made of K14 ear material. Hereinafter, the present invention will be described with
reference to the drawings. The drawing shows an example of a speaker according to the
invention, which is a cross-sectional view 6 3 with a gloss, E 1 is a center ball, 2 Fi play), 3 a
yoke, 4 is a magnet, 5 female pois coil, 6 Korean damper, 7 common dustproof film, 8 and 9 is a
cone formed of different materials so that the holding reproduction range is-&, and 10 is an edge.
Glue and bond at appropriate places of cones 8 and 9 cone shape. When the apex angle θ of the
cone paper is a sterile cone shape, it is necessary to reduce the mass mc of the entire general
cone and to break it and to increase the stiffness 3h in order to raise the electric field resonance
frequency. The stiffness Sh is in the toning of 8h = ICitc ("" lai & e) "i, and as is apparent from
this, it is proportional to the stiffness shh jangling rate E and the cone O thickness 1e. In general
cones, in order to satisfy these, it has been investigated to raise the high-resonance frequency
more than using a Young's modulus O @-such as a carbon fiber and using a mass of 4 o * v-4 o
The present corn II method # C-can not be partially compounded-these compounds are spread
throughout the whole cold corn, combined with the complex 1 kll motion mode in the middle and
high tone range, the g & m characteristic and It is difficult to get the sound quality. The cone 8 in
the invented speaker is a diaphragm mainly intended for middle to high range reproduction, and
a diaphragm mainly intended for middle to low range reproduction of the cone 9, and the
vibration processing rate to which the voice coil 5 is also transmitted The top of the hgi moth
cone 8 must be emitted in the direction of the edge 10 of the cone 9.
If a plastic film or a metal diaphragm is used for this winding cone 8, it is possible to raise the
high frequency reproduction layer wave number by itself by setting the stiffness 8h sufficiently
higher than the relationship of these materials. When using turtle material such as small 1 paper
of stiffness 3h for 1 cone 9-that absorption of unwanted radiation components can be achieved
IIC), small middle and high range reproduction aperture (effective vibration radius)-small k- It is
one to be able to achieve improvement in directivity as well. In addition, since the cone mass can
be reduced, the sound pressure characteristic is also improved. In order to lower the high
frequency range reproduction frequency IIk, the component parts are opposite to those in the
case of the above-described case, or in this case, only the cone 8 is squeezed, and the cone 9 can
be diverted. In order to lower the high frequency range playback frequency, it is better for the
cone 8 to have the stiffness sh so that the cone 8 does not play the middle and high frequency
range. Compared with the conventional speaker cones, it is easy to obtain 60 even with sharp
toppling characteristics in the middle to high range. In addition, current low f, conversion (chi.
When dealing with the bass resonance frequency), it is possible to select the material of the cone
8 appropriately and control the weight of the speaker to control the speaker's fg without
changing the overall sound quality. The present invention is of course not limited to the abovedescribed example, and many changes can be made. For example, the cone may be formed not
only in two parts (8, 9), but also in three or more parts in which each holding reproduction range
is different.
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