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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view of a conventional horn speaker
equalizer, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a top view of another conventional
example, FIG. FIG. 5 is a top view of an equalizer for a horn speaker according to an embodiment
of the present invention, FIG. 6 is a bottom view of the same, and FIGS. 7A, 7B, 7C. D is a top
view, a side view, a front view, a bottom view, and FIG. 8 is a perspective view of the same, and
FIG. 9 and FIG. It is a top view of an example. 10.20, 30, 40
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Sound holes (slits).
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction
of an equalizer for positioning the horn speaker in close proximity to the diaphragm, increasing
the acoustic radiation impedance added due to vibration and enhancing the efficiency of the
speaker, in particular the manufacture of the equalizer It provides the structure of an equalizer
that can be easily matched. First, with reference to FIG. 1 and FIG. 2, the conventional 1
'equalizer of this type will be described with reference to FIG. 1 and FIG. 2. In FIG. 1, 1 is an
equalizer, and + // -Q'Q- ? 2 A plurality of sound holes 2 are formed in the equalizer 1. Each
sound hole 2 increases in section as it goes from the upper surface to the lower surface of the
diaphragm 3 side, and each sound hole 2 is formed by approaching the central axis 0 of the
equalizer 1 as it goes from the diaphragm 3 side downwards It is done. When manufacturing the
prior art equalizer 1 shown in FIG. 1F and FIG. 2, one with a tapered quino from the lower
surface side of the pro (1) where the upper surface and upper surface of the diaphragm side are
curved. The sound holes 2 have to be formed by drilling holes individually, which is very difficult
to manufacture or mass production. Also, it is conceivable to place a mold in the portion to be
reinforced in the sound hole 2 and integrally form it with resin etc. The front hole 2 itself is
tapered or the central axis of each sound hole 2 and the central axis of the equalizer Because it is
not parallel, integral molding with resin etc. is also very difficult 0 In order to remove the pause
point in the manufacture of the above-mentioned conventional example FIG. 3; FIG. 1-4; equalizer
shown in FIG. In the prior art equalizer shown, the conical three central portion H4, the deformed
cylindrical intermediate member 6, and the deformed cylindrical outer peripheral member 6 are
coaxially disposed, and a spacer 7.5 is provided between the respective members 4.5 + 6. 1 is
interposed and the annular gap 81 between the respective members 4I 5 6 is used as a sound
hole O. However, the conventional example reduced in FIG. 3 and FIG. And the predetermined
characteristics can not be obtained, and the shape of each member 4, 6.6 or all Differently, there
is a disadvantage that three kinds of members have to be manufactured. 0 The present invention
eliminates the above-mentioned conventional drawbacks, and one embodiment of the present
invention will be described below with reference to FIGS. In the equalizer of the present
embodiment, each of the divided members 10.20 + 30 + 40 configured by combining divided
members 10 + 20130.40 of a shape obtained by dividing 3600 all around the center axis 0 into
four parts has two joint surfaces. That is, OH plane and OH plane for the division member 10, 02
plane and 00 curve 111 for the division member 20t'i, oG curve and OH plane for the division
member 30, division section 11 @ 4 ░, -C, ri.
?????????????? Next, the details of the dividing member according to the present
embodiment will be described with the dividing member 10 as a representative, with reference to
the off views A, B, C, D and FIG. In the off views A-D and E-8, 11 + 12 is a slit-like sound hole
formed linearly from one bonding surface side of the divided member 10 to the vicinity of the
other bonding surface side, and this sound hole 11y12 It penetrates between the upper and
lower surfaces of the dividing member 1 ░. The width of the sound hole 11 ░ 120 is still
smaller on the upper surface side than on the lower surface side, and the sound hole is formed so
as to approach the central axis 0 as it goes to the lower surface. The same sound hole 21 ░ 22 +
31 $ 32 + 41 + 42 is also formed in the dividing member 20930 t 40 ? 6 of the above four
divided in '10 + 20 t 30 + 40? The equalizer is depicted by bonding as shown in FIG. 2'6.
According to the said Example, each division member 10 + 20 + 30140 can be shape | molded by
resin etc. That is, it is the function 6 to pull out the mold for forming the sound hole 11.12 in the
direction of the arrow of the drawing A off. As described above, in the above embodiment, the
entire 360 ░ around the central axis 0 is divided into four, but it may be divided into eight
around the central axis 0 as shown in FIG. It is a thing. The number of sound holes is not limited
to two, and three sound holes may be formed in each divided member as shown in the tenth [;].
The equalizer according to the present invention has the above-described structure, and
according to the present invention, it has an advantage that each divided member can be molded
with a resin or the like, and the manufacture of the equalizer can be easily performed. The 36o
centered on the central axis. In the case of dividing the entire circumference into a plurality of
equally-divided members, in particular, each divided member can be made to have the same
shape, and there is an advantage that only one type of mold can be used to form the divided
portion. .
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