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JP2010206557

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Notice
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 JP2010206557
An object of the present invention is to provide a building material which is large in size and in
which the appearance of the diaphragm does not change even when used for a long time. A
building material according to the present invention includes a frame coupled to a magnetic
circuit, a first diaphragm coupled to an outer peripheral portion of the frame, and a first
diaphragm coupled to the first diaphragm. A voice coil inserted in the magnetic gap of the
magnetic circuit, a panel coupled to the frame, and a space surrounded by the panel, the space
coupled to the first diaphragm, and the second coupled to the space And the second diaphragm is
smaller in area than the space, and a portion of the second diaphragm coupled to the space is
under tension. Do. [Selected figure] Figure 1
Building material
[0001]
The present invention relates to a building material, and in particular to a building material
having a sound reproducing function used for a building such as a house, an apartment, an office
building and the like.
[0002]
The building material provided with the conventional sound reproduction function is
demonstrated using drawing.
[0003]
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1
FIG. 8 is a structural sectional view of the building material 100. As shown in FIG.
In FIG. 8, reference numeral 101 denotes a panel including a ceiling material, and the panel 101
is provided with a through hole 101 a.
A flat diaphragm 102 is fitted in the through hole 101a, and a vibrator 103 having a magnetic
circuit, a voice coil, and a vibration transmission member is joined on the flat diaphragm 102.
Music and voice signals are input to the exciter 103, and the flat diaphragm 102 coupled to the
exciter 103 is excited by the driving force generated from the exciter 103 to reproduce sound.
[0004]
With this configuration, by installing this building material on the ceiling or wall of a house,
music can be enjoyed in a space-saving manner and without impairing the decorativeness of the
room. JP, 2006-133639, A
[0005]
However, in order to secure a certain sound pressure, it is necessary to reduce the weight of the
flat diaphragm, so the thickness of the flat diaphragm must necessarily be reduced. As an
example, the case of using a flat diaphragm such as resin, metal or wood having a thickness of
about 1 to 5 mm is often seen. On the other hand, since the exciter is provided with a magnetic
circuit such as iron or magnet, this exciter has a certain weight. Therefore, if the vibrator with a
heavy weight is continued to be supported by a thin flat plate with low rigidity and shape rigidity,
the weight of the vibrator causes the central portion of the flat plate to be bent, which is not
preferable in appearance Had the task of In particular, this problem is remarkable in the case of a
sound reproduction apparatus for home installation where the size of the apparatus is large and
the long service life is required.
[0006]
An object of the present invention is to provide a building material which is large in size and
hardly changes in appearance of the diaphragm even when used for a long time.
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2
[0007]
The building material of the present invention comprises a frame coupled to a magnetic circuit, a
first diaphragm coupled to an outer peripheral portion of the frame, and the first diaphragm
coupled to a part of the magnetic plate A voice coil fitted in a magnetic gap of a circuit, a panel
coupled to the frame, a space bounded by the panel coupled to the first diaphragm, and a space
bounded by the panel The second diaphragm is smaller in area than the space enclosed by the
panel, and is coupled to the space enclosed by the panel of the second diaphragm. It is
characterized in that tension is applied to the part.
[0008]
According to the present invention, the first diaphragm and the second diaphragm are
acoustically coupled between the first and second diaphragms so as to reproduce sound, so that
the second diaphragm is directed downward, There is no weight other than its own weight on
this second diaphragm.
Further, by coupling with the closed space in a state where tension is applied to the second
diaphragm, deformation of the second diaphragm due to gravity can be prevented.
Therefore, since it is possible to provide a building material that hardly changes the appearance
of the second diaphragm even if the device is enlarged, it is possible to enjoy music with high
quality sound quality without damaging the decoration of the room over a long period of time.
[0009]
Embodiment 1 Hereinafter, a building material 200 according to Embodiment 1 of the present
invention will be described using the drawings.
[0010]
FIG. 1 is a structural cross-sectional view of a building material 200 according to Embodiment 1
of the present invention.
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FIG. 2 is a structural cross-sectional view of the building material 200 before the second
diaphragm and space are coupled.
[0011]
As shown in FIG. 1, the building material 200 includes an electromechanical acoustic transducer
217. The electromechanical acoustic transducer 217 sandwiches the magnetized magnet 201 by
the upper plate 202 and the yoke 203 to form a magnetic circuit 204. The frame 206 is coupled
to the yoke 203 of the magnetic circuit 204. The outer periphery of a first diaphragm 207 is
adhered to the periphery of the frame 206, and one end of a cylindrical voice coil bobbin 208 is
coupled to the first diaphragm 207, and the magnetic circuit is connected to the other end. The
voice coil 209 is wound so as to be fitted into the magnetic gap 205 of 204. At the central
portion of the first diaphragm 207, a dust cap 212 for dust protection is provided. An edge
portion 211 is joined to an outer periphery of the first diaphragm 207, and a side of the edge
portion 211 which is not joined to the first diaphragm 207 is joined to the frame 206. Reference
numeral 210 denotes a support portion in which the inner periphery is joined to the voice coil
bobbin 208 so as to hold the voice coil 209 at the center of the magnetic gap 205 and the outer
periphery is joined to the frame 206.
[0012]
Furthermore, the building material 200 couples the panel 213 to the peripheral portion of the
frame 206, and the second diaphragm 214 which is substantially planar and larger in area than
the first diaphragm 207 is made of elastic material. Bonding is performed via 216, and a space
215 acoustically couples the first diaphragm 207 and the second diaphragm 214. Here, as a
material of the second diaphragm 214, a thin resin or metal on which a sheet-like film whose
surface is subjected to printing is attached, metal, or a wood plate is suitable.
[0013]
Here, as shown in FIG. 2, the second diaphragm 214 coupled to the space 215 is slightly smaller
in area than the space 215. The second diaphragm 214 is tensioned by being coupled to the
space 215 via the elastic body 216 in a state where the second diaphragm 214 is stretched to
the same size as the space 215. Therefore, since the second diaphragm 214 is always slightly
pulled outward, the second diaphragm 214 is not easily affected by gravity. In the case where the
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diaphragm 214 is formed of metal, it is difficult to stretch and apply tension, but the second
diaphragm 214 is coupled to the space 215 at high temperature using the thermal expansion
property of the metal. By doing this, it is possible to maintain a tensioned state when used at
normal temperature.
[0014]
In the building material 200 of the present invention, when the first diaphragm 207 applies a
pressure to the space 215 by the voice coil 209 driving the first diaphragm 207, the pressure
applied to the space 215 becomes the second pressure. The second diaphragm 214 is driven by
being transmitted to the diaphragm 214. Here, assuming that the effective vibration area of the
first diaphragm 207 is S1, the effective area of the second diaphragm 214 is S2, and the weight
of the second diaphragm 214 is M2, a voice is produced by the effect of the acoustic
transformer. The equivalent weight of the second diaphragm 214 viewed from the coil 209 is M2
/ (S2 / S1) <2>.
[0015]
As described above, the electromechanical acoustic transducer 217 vibrates the second
diaphragm 214 through the space 215, thereby vibrating the second diaphragm 214 having a
large area and heavy weight with a small force to generate a sound. Since it can be regenerated,
it is useful as a building material for housing installation which can take a large vibration area.
[0016]
With this configuration, no weight other than itself is added to the second diaphragm 214.
Further, by combining the second diaphragm with the sealed space in a state where tension is
applied to the second diaphragm, it is possible to prevent deformation of the second diaphragm
due to gravity. Therefore, the second diaphragm 214 is less likely to be bent or otherwise
deformed, and it is possible to suppress the appearance problem even when used for a long time.
[0017]
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In the present embodiment, although the material of the second diaphragm 214 is resin, metal,
or wood with the sheet-like film with the printing applied on the surface, the sheet-like film itself
is the second diaphragm. The same effect can be obtained as 214. In this case, the weight of the
second diaphragm 214 is reduced, which is advantageous in terms of sound pressure.
[0018]
Furthermore, by configuring the second diaphragm 214 using a transparent panel or a
transparent sheet-like film without using a sheet-like film whose surface has been subjected to
printing, the image display and illumination functions can also be performed. It also becomes
possible to provide the provided building material.
[0019]
In addition, although the frame 206 used in the general electromechanical acoustic transducer
217 is provided with a plurality of holes, the frame that does not have the holes that allows air
flow in and out can be used to Since generation of sound to the back surface of the mechanical
acoustic converter 217 can be suppressed, it is possible to prevent sound leakage to the upper
floor.
[0020]
Second Embodiment Hereinafter, a building material 300 according to a second embodiment of
the present invention will be described with reference to the drawings.
The same parts as those of the first embodiment are designated by the same reference numerals
and the description thereof is omitted.
[0021]
FIG. 3 is a structural cross-sectional view of a building material in Embodiment 2 of the present
invention.
4 to 6 are structural cross-sectional views of a building material 300 according to a modification
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of the second embodiment of the present invention.
[0022]
As shown in FIG. 3, the building material 300 is such that a recess 302 is formed in the panel
301 in accordance with the outer peripheral shape of the frame 206, and the frame 206 is
embedded.
[0023]
With this configuration, the electromechanical acoustic transducer 217 can be configured not to
protrude from the upper surface of the panel 301, so that the entire building material can be
thinned, and the electromechanical acoustic transducer 217 is protected from external factors. It
becomes easy.
[0024]
As shown in FIG. 4, the adhesive or sealing agent 303 is applied to the depression 302 provided
in the panel 301 to eliminate air leakage between the panel 301 and the frame 206, thereby
providing an enclosed space 215 acoustically coupled. It is possible to ensure the air tightness of
the and prevent the flicker noise.
[0025]
Further, as shown in FIG. 5, by disposing the sound absorbing member 304 around the frame
206 of the recess 302 provided in the panel 301, it is possible to suppress the emission of sound
to the back of the electromechanical acoustic transducer 217. , It becomes possible to prevent
the sound leak to the upper floor.
[0026]
Furthermore, as shown in FIG. 6, by providing a lid 305 that does not interfere with the frame
206 on the top of the recess 302 provided in the panel 301, the sound to the back of the
electromechanical acoustic transducer 217 can be suppressed. Since it can, it becomes possible
to prevent the sound leak to the upper floor.
[0027]
Third Embodiment A building material 400 according to a third embodiment of the present
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7
invention will be described below with reference to the drawings.
The same parts as in the first embodiment and the second embodiment are denoted by the same
reference numerals, and the description will be omitted.
[0028]
FIG. 7: is sectional drawing of the building material 400 in Embodiment 3 of this invention, and
the house 500 which installed this building material.
[0029]
As shown in FIG. 7, the second diaphragm 402 is made of the same material as the ceiling 501 of
the house 500, so that it can be installed in the house without discomfort from the surrounding
ceiling. Become.
In addition, in the house where this building material 400 is installed, the speaker system which
has conventionally been installed in the living space including the floor becomes unnecessary, so
that effective utilization of the living space becomes possible, and the decoration of the room is
improved. It is possible to enjoy music even in the state of keeping it.
[0030]
Although the building material 400 constitutes a part of the ceiling of the house 500 in FIG. 7,
the building material 400 may constitute the entire ceiling of the house 500.
[0031]
Further, in the present embodiment, the building material 400 is a part of the ceiling that
constitutes a house, but the wall surface other than the ceiling, the ceiling of a mobile including
an automobile, and the surface part that constitutes the housing equipment It may be the
material 400.
[0032]
The building material of the present invention is useful as a building material to be installed in a
building such as a house, an apartment, or an office building.
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[0033]
Structural cross-sectional view of the building material in Embodiment 1 of the present invention
Structural cross-sectional view of the building material in Embodiment 1 of the present invention
before bonding the second diaphragm and the space Embodiment of the present invention
Structural sectional view of the building material in 2 Structural sectional view of the building
material in the modification of the second embodiment of the present invention Structural
sectional view of the building material in the modification of the second embodiment of the
present invention Second embodiment of the present invention Structural sectional view of
building material in modification Example of structural material in the third embodiment of the
present invention and structural sectional view of a house where the building material is installed
Structural sectional view of a building material provided with a conventional sound reproducing
function
[0034]
100, 200, 300, 400 Building material 101, 213, 301 Panel 101a Through hole 102 Flat plate
diaphragm 103 Vibrator 201 Magnet 202 Top plate 203 Yoke 204 Magnetic circuit 205
Magnetic air gap 206 Frame 207 First diaphragm 208 Voice coil bobbin 209 voice coil 210
support portion 211 edge portion 212 dust cap 214, 402 second diaphragm 215 space 216
elastic body 217 electromechanical acoustic transducer 302 hollow 303 adhesive agent, sealing
agent 304 sound absorbing member 305 lid portion 500 housing 501 ceiling
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