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JPS5748789

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DESCRIPTION JPS5748789
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional coneshaped speaker, FIG. 2 is a front view for explaining the operation of the cone-shaped speaker
according to the present invention, and FIG. The front view of the cone which provided the slit,
FIG. 4 is a front view of the cone of a curve slit similarly. DESCRIPTION OF SYMBOLS 1 ... Cone, 2
... Movable wire ring attachment part, 3 ... Edge, 4 ... Slit, 5 ... Movable wire ring, 6 ... Place
magnet.
[Detailed description of the invention] The speaker is a cone-shaped speaker, but it is a coneshaped or slightly curved circle-shaped, wedge-shaped paper diaphragm (cone) at the top of the
circle, A drive mechanism such as a movable-5 wire wheel is attached, and FIG. 1 is a crosssectional view thereof. In this type of speaker, the entire cone reciprocates according to the
reciprocating motion of the movable wire ring in the low frequency range, but the entire cone
can not follow the vibration of the movable wire ring in the high frequency range, and only the
central portion of the cone reciprocates As shown by the dotted line in Fig. 1, the vibration at the
center of the cone becomes concentric waves, which propagate to the periphery and are
absorbed by the etched part, but at this time resonance is easily generated in the cone and not
absorbed by the edge. The waves reflected on the surface cause standing marks, resulting in
complicated peaks l and 2'.cndot.- 1-valley in the characteristic curve, which degrades the sound
quality. In order to ameliorate this drawback, cones have been provided with concentric folds and
various other improvements have been made. This invention is also an invention which
ameliorates the above-mentioned drawbacks. That is, the wave propagating concentrically as
described above is divided into cones by radial (radial) slits (spaces), thereby dispersing and
reducing resonance and settling waves of the cone and improving sound quality. The purpose is
to The speaker of this invention will be described with reference to the drawings. In FIG. 2, 1 is a
cone (diaphragm), 2 is a mounting portion of a movable coil, 3 is an etch, and 4 is a slit according
to this invention. The slits 4 are cut away from the central portion of the cone 1 as shown in the
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drawing and are radically cut so as to reach the edge 3 and are alternately arranged in such a
way that the number increases in the peripheral portion. The width of the slit 4 varies depending
on the diameter -1 of the cone 1 and the like, but it does not contact when the cone 1 vibrates;
When the cone 1 configured in this way is driven in the high range, the cone 1 reciprocates only
in the central vicinity, generates concentric waves as shown by dotted lines around it, and
propagates in the 2-etch direction Is divided by the slit 4 and reaches the etch while dispersively
decaying 1 energy of the wave and absorbed and disappears. Since the slit 4 has a length and a
length, this subdivision damping is performed stepwise. Since the spatula is dispersed and
damped like this, the waves are not absorbed by the etch and are reflected to create a standing
wave, which causes less resonance than a conventional cone. The resonance of the fork cone
itself is also weak and dispersed because the peripheral part is divided by the slit 4, and the
characteristic of the tonal range is low in the valleys and flat. In the low-pitched range, the cone
according to the present invention reciprocates the entire cone in the same manner as the cone
in the far east, but the slit 4 is cut by radials, so the stiffness (stiffness) in one direction of the
cone 1 decreases And the lowest resonant frequency of the cone 1 is reduced.
Therefore, the bass range is extended and the bass characteristic is also improved. It is also one
of the features that the stiffness of the cone 1 can be adjusted to some extent by the number and
length of the slits 4 or the like. The number and length of the slits 4 are free. Also, as shown in
FIG. 3, there is no hindrance to the inclination of the dew to the radial and the curve as shown in
FIG. In practice, the characteristics of this speaker change delicately depending on the number,
length, price distribution, shape, etc. of slits 3-4. The speaker according to this invention has a
slit of the appropriate number and length in the radial of the conventional speaker cone as
described above, to expand the reproduction range of the speaker, flatten the characteristics, and
improve the natural reproduction sound. In addition, the cost increase due to the improvement is
very small.
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