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JP2006333226

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2006333226
The present invention provides a low cost and high assembly accuracy 12-sided speaker box and
a 12-sided speaker using the speaker box. SOLUTION: With respect to each of twelve adjacent
pentagonal panels 20 constituting a speaker box 10 of a regular dodecahedron-shaped
dodecahedron speaker SP2 in which outlines of twelve pentagonal panels are joined as ridge
lines. The pentagonal panel and the independent connecting members 30 are connected and
configured. Furthermore, the shape of the connecting member 30 is made into a long hexagonal
shape, and is bent about the longest diagonal. [Selected figure] Figure 2
Speaker box for dodecahedron speaker and dodecahedron speaker
[0001]
The present invention relates to a dodecahedron speaker and a speaker box for a dodecahedron
speaker.
[0002]
Conventionally, a dodecahedron speaker having twelve speaker units 3 as shown in FIG. 5 is
known (see, for example, Patent Document 1).
[0003]
Such a twelve-sided speaker 1 is obtained as an extremely wide directivity characteristic by
twelve speaker units 3 evenly arranged toward the periphery, and is used as a high-quality audio
device.
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[0004]
JP 2005-51694 A
[0005]
However, when a complex shape such as a regular dodecahedron shape is integrally formed by
die casting using a material such as aluminum, the manufacturing cost increases.
That is, a mold of at least the size of the speaker box is necessary, and in order to form the hole
for mounting the speaker unit into a dodecahedron, it is necessary to use a slide mold.
[0006]
On the other hand, although it is conceivable to prepare 12 pentagonal panels constituting the
surface of the speaker box and weld them all, it is conceivable to relatively increase the location
(distance) required for welding, which causes distortion due to heat. The amount of generation
increases.
In addition, the cost required for welding is large, and the process becomes complicated.
[0007]
The present invention has been made to solve these problems, and provides a low-cost, lowdistortion, twelve-sided speaker box and a twelve-sided speaker using the speaker box.
[0008]
The present invention is a regular dodecahedron shape in which the outlines of 12 pentagonal
panels are joined as ridges, and a plurality of pentagonal panels having speaker unit installation
holes provided substantially at the center of the pentagonal panels are joined. In the
dodecahedron speaker having the speaker box and the speaker unit installed in the speaker unit
installation hole, the 12 pentagonal panels are connected to all adjacent pentagonal panels by
independent connecting members. The above problem is solved by adopting the configuration.
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[0009]
Further, the connecting member may be a member having a long hexagonal shape and bent with
the longest diagonal of the long hexagon as an axis.
[0010]
Further, the connecting member may be a member having a triangular cross section orthogonal
to the longitudinal direction of the connecting member.
[0011]
Furthermore, the present invention combines a plurality of pentagonal panels in the shape of a
regular dodecahedron in which the outlines of 12 pentagonal panels are joined as a ridge line,
and in which the speaker unit is installed substantially at the center of the pentagonal panels.
The foregoing problem is solved by providing the twelve pentagonal panels connected to all the
adjacent pentagonal panels by independent connecting members.
[0012]
Further, the connecting member may be a member having a long hexagonal shape and bent with
the longest diagonal of the long hexagon as an axis.
[0013]
Further, the connecting member may be a member having a triangular cross section orthogonal
to the longitudinal direction of the connecting member.
[0014]
The apexes are twenty convex portions present on the surface of a regular dodecahedron.
Moreover, a ridgeline is the straight line which comprised the pentagonal external shape in a
regular dodecahedron, and connected the vertices.
[0015]
According to the present invention, since the speaker box can be formed with a small mold that
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can form one pentagonal panel, the cost can be significantly reduced.
[0016]
In addition, since the panels can be assembled without direct welding, it is possible to
manufacture a speaker box with high accuracy and further a dodecahedron speaker.
[0017]
Further, by connecting all the pentagonal panels with each other by mutually independent
connecting members, the speaker box can be made to have a strong structure without directly
welding the panels.
[0018]
Examples of embodiments of the present invention will be described in detail using the attached
drawings.
[0019]
As shown in FIGS. 1 and 2, the dodecahedron speaker SP2 is configured to include a speaker box
10 and twelve speaker units 4.
[0020]
The speaker box 10 has a regular dodecahedron shape, and is constituted by twelve pentagonal
panels 20.
[0021]
At substantially the center of each pentagonal panel 20, a speaker unit installation hole 12 for
installing the speaker unit 4 is provided.
Although a speaker unit fixing hole 14 is provided around the speaker unit installation hole 12, it
is not necessarily essential. For example, the speaker may be fixed by bonding.
The pentagonal panel 20 is formed by die-casting using a metal such as aluminum.
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[0022]
As shown in FIG. 2, 12 pentagonal panels 20 are assembled in a regular dodecahedron, and are
connected by independent connecting members 30 between all adjacent pentagonal panels. .
More specifically, if five pentagonal panels 20B, 20C, 20D, 20E, and 20F are adjacent to one
pentagonal panel 20A, five pentagonal panels 20B, 20C, 20D, 20E, and 20F are adjacent to one
another. The square panel 20A is connected to each pentagonal panel (20B to 20F) by five
connecting members 30.
Furthermore, the same configuration as that described above holds for all the other pentagonal
panels 20, and at least a total of 30 connecting members 30 connect the pentagonal panels 20
together in the entire speaker box 10.
In addition, the fixing method of the connection member 30 and each pentagonal panel 20 here
is considered variously, for example, the method of fixing with the volt ¦ bolt which is not shown
in figure, the method of fixing with an adhesive agent, etc. can be considered.
[0023]
Further, the connecting member 30 is a member having a long hexagonal shape as shown in FIG.
4 (A).
Furthermore, it is set as the structure bent in the shape of "く" centering on the longest diagonal
of the said long hexagon (refer FIG. 4 (B)).
The connecting member 30 is preferably made of resin if cost is important, but it may be made of
metals.
[0024]
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Moreover, it does not necessarily have to be a '-' shaped member, and for example, the cross
section orthogonal to the longitudinal direction of the connecting member 30 may be a
triangular member (see FIG. 4C).
[0025]
The connecting member 30 is basically a member for connecting the pentagonal panels 20
together from the inside of the speaker box 10 as shown in FIG. It may be located on both sides.
[0026]
By preparing the speaker box as a plurality of pentagonal panels in this manner, it is possible to
manufacture each sub-unit with a small mold.
This means that the stroke amount of the mold at the time of molding is small, which can also
contribute to the compactness of the entire molding apparatus.
Further, since the speaker box 10 is finished without directly welding the panels, it is not easily
affected by the heat of welding, and the assembly accuracy can be improved.
[0027]
In addition, since each pentagonal panel is connected by an independent connecting member, a
speaker box having high strength can be configured without directly welding the panels.
[0028]
Also, the twelve pentagonal panels 20 described above need not all have the same shape.
That is, when a mounting portion such as a speaker stand is required, only the panel of that
portion may be designed to be thick, for example.
[0029]
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Although the material of the pentagonal panel has been described on the premise that it is
aluminum, the present invention is not necessarily limited thereto. For example, iron materials,
metals such as magnesium and stainless steel, resins, wood, etc. It is also possible to use.
The iron material contributes in particular to the improvement of the fastness, the magnesium in
particular contributes to the fastness and weight reduction, the stainless steel contributes to the
corrosion resistance, and the resin particularly contributes to the weight reduction and cost
reduction. According to wood, there are features and advantages that contribute to weight
reduction and design improvement.
In consideration of the manufacturing cost, die-cast molding of aluminum or the like, sand cast
molding, press molding, or injection molding of resin, blow molding, injection molding, and the
like are preferable.
[0030]
Further, in the above description, it has been described on the premise that the speaker units are
installed on all the 12 faces of the dodecahedron, but this is not necessarily the case.
For example, in the case of installing on the floor with the surface of 1 as the bottom surface, or
in the case of installing in the vicinity of a wall, a closing plate or the like may be installed on a
part of the surface instead of the speaker unit.
[0031]
It can be used not only for dodecahedron speakers but also for other polyhedron speakers
widely.
[0032]
FIG. 2 is an overall view of the connecting member taken along the line III-III in FIG. 2 showing
the positional relationship between the speaker box and the connecting member; FIG. 2A is a
plan view; FIG. A cross-sectional view taken along the line IVB-IVB in A), and a cross-sectional
view when the cross-section taken along the arrow IVB-IVB is configured as a triangle as another
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embodiment of the connecting member
Explanation of sign
[0033]
SP 2 ... 12-sided speaker 4 ... speaker unit 10 ... speaker box 12 ... speaker unit installation hole
14 ... speaker unit fixing hole 16 ... apex 18 ... ridge line 20 ... pentagonal panel 30 ... connection
member
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