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JPS53144334

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DESCRIPTION JPS53144334
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view of a conventional horn speaker, FIG.
2 is a longitudinal sectional view of the same horn, and FIG. 3 is a top plan view of an essential
part of the horn speaker of the present invention. FIG. 5 is a longitudinal sectional view of the
horn portion, FIG. 5 is a top cross-sectional view of an essential part of a horn speaker according
to another embodiment, and FIG. 6 is a side view of the longitudinal sectional view. 6 и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и Inner partition wall plate
12, 12: squeezing portion 13, 13: projection, 14: recess.
DETAILED DESCRIPTION OF THE INVENTION The present invention seeks to provide an easy-tofabricate, high-performance horn spin) force. ? <-/ '/'! Monument 2 Figure 1 as a horn speaker
in the prior art. It was configured as shown in FIG. That is, the horn 2 with a fan-shaped cross
section and a horn-shaped or exponential-shaped cross section is included in the driver part 1
configured by incorporating a diaphragm with a voice coil in the magnetic circuit. They are
combined to constitute a horn speaker. In this horn speaker, both side surfaces are sequentially
waved from the horn throat 3 to the horn opening 4 as shown in FIG. 1, but the upper and lower
surfaces are close to the horn throat 3 as shown in FIG. It is squeezed in at a position, and this
throttling portion 6 has the smallest cross-sectional area. That is, the shape of the horn 2 is a
reverse tapered portion from the horn throat portion 3 to the throttling portion 5 and is a
forward tapered portion from the throttling portion 5 to the horn opening 4. The reason why the
reverse taper portion is provided in this way is to match the impedance of the diaphragm, which
is a sound source, with the impedance of the space, and to obtain the j original effect to improve
the transmission efficiency. (3) The horn 2 according to the above configuration has a forward
tapered portion and a reverse tapered portion, so that it has been difficult to make it integral in
number when it is manufactured. ???? If the inverse taper part is eliminated, integral
number type becomes a town and ability, but in this configuration, the original function as the
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horn is not lost, and in particular, the radiation impedance is disturbed in the high frequency
band, and the horn speaker Performance is extremely degraded. Therefore, in the prior art, the
horn 2 is formed by dividing it into two parts with the line AA / line shown in FIG. In this case, it
is necessary to combine parts which have been divided and molded, and if bonding is not
accurately performed, the performance may be lowered acoustically, the molding accuracy must
be increased, and the degree of bonding precision is also required. Production cost is extremely
expensive. The present invention eliminates the above-mentioned conventional drawbacks.
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 3
and 2 of the accompanying drawings. 4 First, in FIG. 3 to FIG. 4, 6 is a driver and a part, and this
driver part 6 is constituted by a magnetic circuit including magne and to, a diaphragm provided
with a voice coil, and the like. The horn 7 is coupled to the driver portion 6. The horn 7 has a fanlike cross section and a vertical cross section in the form of a hyper-polished or exponential form.
Moreover, the horn 7 is all forward tapered from the horn throat 8 to the horn opening 9. A
groove 10 is formed from a horn throat 8 to an intermediate portion on the inner side of both
sides of the horn 7. A horn inner partition wall plate 11 is fitted and fixed in the groove 10. The
longitudinal section of the horn inner partition wall plate 11 is a convex lens shape. That is, in
the middle part, it is intended to function in the same way as the conventional throttling part by
0. That is, the horn 7 is forward tapered so that it can be molded as a single piece and it is close
to the horn throat part 8) 5. Combine the horn middle partition wall plate 11 separately formed
at the position, and form the narrowed portion 12 as the horn 7 by the expansion of the middle
part of this horn middle partition wall plate 11 to obtain the original characteristics of the horn It
is said that. As another embodiment, as shown in FIG. 5 and FIG. 6, a protrusion is formed on one
side of the horn middle partition wall plate 11 in the middle of the joint surface between the
inner wall surfaces on both sides of the horn 7 and the horn middle partition wall plate 11. 13 is
provided, four parts 14 are provided on inner wall surfaces on both sides of the horn 70, and the
projection 13 is pressed into the recess 14 to measure the connection of the two, and the
partition wall plate 11 of the horn rotates about the projection 13 in the arrow direction. Thus,
the directivity characteristic of the horn speaker can be varied. The projection 13 may be
provided on the horn 7 and the recess 14 may be provided on the side surface of the partition
wall plate 11 in the horn. This horn 7 is similar to that shown in FIGS. 3 and 4 and is forward
tapered from the horn throat 8 to the horn opening 9 to enable integral molding, and a convex
lens as the partition wall plate 11 in the horn Of course it is to form in the shape. Since the horn
speaker according to the present invention is configured as described above, the horn can be
made to have a forward taper from the horn throat portion to the horn opening portion 1 as a
horn, so that molding as an integral body becomes possible. It is easy to assemble and
manufacture, and it is extremely advantageous in cost because the horn middle partition wall
plate of cross-sectional shape is simply arranged from the horn throat to the middle so that both
ends are thin in the horn and the bulge is in the middle. In addition, the original function of the
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horn can be sufficiently maintained, the performance does not deteriorate, and the accuracy of
the horn and the partition wall plate of the horn can be easily considered from the molding
conditions, and the shape can be made clear. Etc., and have great practical value.
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