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JPS538221

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DESCRIPTION JPS538221
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of
a horn speaker according to the present invention, FIG. 2 is an exploded perspective view of the
horn, and FIG. 3 shows an integrally coupled state of the horn. FIG. 11 · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · plate
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to horn
loudspeakers, and more particularly to a novel arrangement of mid, bass suitable devices. In
general, when a horn speaker is formed, there are conventionally methods by die casting,
methods by shaving, methods by method 11, etc. These (1), 122 ': many man-hours, expensive
Required materials. In addition, since the products made by these methods also have
deterioration in sound quality due to the resonance of the material of the horn as they are, it is
necessary to perform processing such as dedensing secondarily. The object of the present
invention is to provide a horn speaker which is easy to manufacture, has little resonance, and can
be manufactured at low cost. A plurality of the formed plate materials are sequentially laminated
so that the size of the through holes is continuously increased, and these are integrally joined to
constitute a horn. Hereinafter, an embodiment of the present invention will be described with
reference to the drawings. In FIG. 1, the driver unit is constituted by the diaphragm and the
magnetic circuit (2) 1 and so on, and the driver unit Q (the horn connected to I. The horn 0 is the
size of each. Of the plurality of plate members (131 having a through-hole a formed so as to be
different from each other) are sequentially laminated such that the size of the j [through-hole t1
continuously increases outward, It is a combination of things. Here, there are various ways of
expanding the opening area of the tree, but taking the case of the exponential horn where the
area increases at a constant rate as the fixed length increases, the cut is taken as an example. The
off frequency fc is represented by fc = 1 × Δ4π 鵬; spread coefficient C: sound velocity (3) × 2
and the area S from the distance from the throat − (clN) is 8 = It is expressed by which area of S"1e; base Sl of natural logarithms". Therefore, since the opening area S of each part can be
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obtained from the cutoff frequency of the speaker by the above equation, in production, each
plate material 0 corresponds to the calculated value S of the area of the through hole a. The
layers may be sequentially stacked to form a continuously expanding horn. In addition, changing
the number of plate members u3 to be logged or changing the combination of sizes of the
through holes t13 may also change the feed rate of K, the cutoff frequency f of the horn (4) l
arbitrarily. It is possible. Therefore, the adjustment can be easily performed, for example, in the
case of adjusting the connection of the sound with the speaker of another band. Furthermore,
when making a large diameter horn speaker, it has conventionally been necessary to cut out a
large tree when making a wooden wood, but even in such a case, it is easily manufactured by
combining plate materials 0. be able to.
In addition, since the thickness of the horn can be made sufficiently large, the pregnancy can be
extremely reduced without the need for processing such as secondary detoning. In the above
practical example, although the area of each gold material t13 itself is changed to meet the area
of the through row, it does not particularly affect the external shape and sound quality of the *one. As shown by @l, a plate material 0 of 1 [surface is the same surface (5) ■ area may be used.
As described above, in the horn according to the present invention, a plurality of base materials
in which through holes are formed so as to be different from one another are integrated and
integrally connected so that the through hole area is continuously increased. Because it has a
pleasant structure, it can be easily and inexpensively manufactured, and since the thickness can
be sufficiently obtained, it is possible to easily reduce resonance as well, and a horn speaker
having various effects can be obtained. .
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