JPS56157894

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DESCRIPTION JPS56157894
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1, FIG. 2, FIG. 3 and FIG. 4 are cross-sectional
views of the edge of the prior art example, and FIG. FIG. 6 is a sectional view showing the
operation of the edge according to the present invention. DESCRIPTION OF SYMBOLS 1 ... edge, 2
... diaphragm, 3 ... acoustic radiation surface, 4 ... frame, 5 ... edge acoustic radiation surface, 6 ...
slit, 7-9 ... bending point.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker edge. As
a conventional speaker edge, as shown in FIGS. 1 to 5, a large number of roll-shaped and 7shaped waveforms are used. In these figures, 1 is an edge, 2 is a diaphragm, 5 is an acoustic
radiation surface, and 4 is a frame. However, this conventional edge has a convex or concave
shape with respect to the 9, pfIl radiation surface of the diaphragm although the acoustic
emission surface of the diaphragm of the speaker has been planarized to improve the acoustic
characteristics. The acoustic emission surface is made to have a dimension of 17 ′ / l, which
contributes to the deterioration of the acoustic characteristics of the speaker. As is well known, it
is theoretically said that the acoustically radiated surface is planar. However, in fact, as described
above, although the diaphragm is planarized, the acoustic radiation surface of the edge is delayed
in planarization, and the acoustic radiation surface of the edge is mainly concave or convex. In
the prior art, the sound emission surface of this edge is formed to be concave or convex, and in
the prior art, there is a dip in the sound 1 # characteristic of the speaker. Also, when a plurality
of loudspeakers are arranged close to each other, the baffle surface is not flat even if the
diaphragm is flat because of the concave or convex shape of the edge. The influence occurs, and
not only the shape effect of the edge owned by the speaker itself, but also the influence of the
reflection due to the edge shape of the other speakers disposed in the vicinity leads to the
deterioration of the sound 1 and reverberation characteristics. . ビタ！ In order to make the
acoustic emission surface of the l '' edge a plane, a flat edge as shown in FIG. 4 is also used.
However, this edge has the disadvantage that it is easy to cause an edge resonance to disturb the
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acoustic characteristics of the speaker, and because the amplitude depends only on the spread of
the edge material, it is difficult to obtain a large amplitude, and these days. I used a lot. The
object of the present invention is to eliminate the above-mentioned drawbacks of the prior art,
and to provide an edge for a speaker in which resonance occurs in a flat plane of the acoustic
radiation surface to obtain a large amplitude. The characteristic feature of the present invention
is that the rigidity of the edge is increased by filling with resin or the like with an edge concave
so that it is difficult to generate edge resonance, and the acoustic radiation surface of the edge is
made flat, and the acoustic radiation of the edge is further generated. A slit is placed over the
entire surface from the surface to the vicinity of the bottom of the edge so as to make the
movement of good linearity even at large amplitude. In the following, the present invention will
be specifically described according to the embodiments shown in the drawings. , V.
FIG. 5 shows an embodiment of the present invention, wherein 5 is an acoustic emission surface
of an edge, 6 is a slit formed on the edge, and 7 to 9 are bending points of the edge, as shown in
FIGS. The same reference numerals denote equivalent parts. FIG. 6 shows the operation of this
edge. The edge 1 bends only at three bending points 7-9. The other parts are filled with resin,
and there is a possibility that the rigidity is increased. The edge 1 in this embodiment may be
made of lightweight molded foam urethane or may be filled with resin such as lightweight
foamed urethane in the conventional edge recess, and its acoustic radiation surface may be
flattened. Further, the shape of the edge may not be V-shaped as shown in this embodiment, and
it may be a shape having three inflection points. As is apparent from the above description, in the
present invention, by filling the resin with an edge recess, the surface of the acoustic radiation
surface is flattened and the rigidity of the edge is increased. The edge of the invention is
designed to suppress the occurrence of the edge resonance and further improve the linearity
with respect to the amplitude of the edge by inserting a slit from the acoustic radiation surface of
the edge to the vicinity of the bottom of the y edge. The d1 baffle surface becomes completely
flat, and the disturbance on the acoustic characteristics due to the edge shape of the nearby
speaker, which occurs in the conventional speaker, is completely eliminated.
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