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JP2015035801

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2015035801
The present invention provides an outdoor flat speaker suitable for outdoor use without losing
the function as a speaker even when rain water or the like adheres. SOLUTION: The flat planar
speaker 10 which can be used outdoors is a flat electrostatic speaker 12 for outputting
directional sound and provided on the surface side of the electrostatic speaker 12; Soundpermeable waterproof sheet 14 for preventing rainwater from entering the speaker 12, a bandshaped anti-vibration member 16 for fixing the waterproof sheet 14, and sound transmission
provided on the surface side of the waterproof sheet 14 And the top sheet 18 of [Selected figure]
Figure 3
Outdoor flat speaker
[0001]
The present invention relates to an outdoor flat speaker that can endure wind and rain for a long
time without losing the function as a speaker under wind and rain environment and can output
directional sound, and in particular, dam construction, tunnel construction, large-scale
construction construction, etc. The present invention relates to an outdoor flat speaker suitable
for outdoor use and long-term use, such as a civil engineering and construction site.
[0002]
BACKGROUND Conventionally, flat speakers consisting of electrostatic speakers are known (see,
for example, Patent Documents 1 to 3).
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The electrostatic speaker is composed of two electrodes facing each other at intervals and a
sheet-like vibrator having conductivity inserted between the two electrodes, and a predetermined
bias is applied to the vibrator. When a voltage is applied and the voltage applied to the electrode
is changed, the electrostatic force acting on the vibrator is changed, and thereby the vibrator is
displaced. If this applied voltage is changed according to the acoustic signal, the vibrator
repeatedly displaces and vibrates accordingly, and a reproduction wave corresponding to the
acoustic signal is generated from the vibrator.
[0003]
As a commercially available electrostatic speaker, there is, for example, a flat speaker (trade
name: TLF speaker, TLF is a registered trademark) manufactured by Yamaha Corporation. The
flat speaker is (1) thin as 1.5 mm in the flat shape itself, (2) light weight as 460 g, (3) can be
folded, (4) small diffusion angle, strong directivity ( 5) It is difficult to attenuate the energy of the
sound, and (6) it has the feature that it can be heard as a clear whisper even under the noise
environment of the construction site. Recently, there are increasing cases where this flat speaker
is used for a signboard or an advertisement of an indoor store. There are also findings that
incorporating the flat speakers into billboards and advertisements has increased their visibility
by a factor of seven.
[0004]
JP, 2011-77924, A JP, 2012-209688, A JP, 2013-21,684 A
[0005]
By the way, the above-mentioned conventional flat speaker is basically premised on indoor use.
For this reason, when a flat speaker is always installed and used outdoors, such as voice
transmission equipment at civil engineering and construction work sites such as dam
construction, tunnel construction and large scale construction work, rain water etc. adheres to
the surface or inside By infiltrating, there is a risk of causing a failure such as no sound being
output from the speaker.
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[0006]
The present invention has been made in view of the above, and it is an object of the present
invention to provide an outdoor flat speaker suitable for outdoor use without impairing the
function as a speaker even when rain water or the like adheres. To aim.
[0007]
In order to solve the above-described problems and achieve the object, the outdoor flat speaker
according to the present invention is an outdoor flat speaker that can be used outdoors, and is a
flat electrostatic that outputs directional sound. It is characterized by providing a type | mold
speaker and the surface sheet which is provided in the surface side of the said electrostatic type
speaker, and has waterproofness and sound transmission which prevent the penetration of rain
water to the said electrostatic type speaker.
[0008]
Another outdoor flat speaker according to the present invention is an outdoor flat speaker that
can be used outdoors, and is a flat electrostatic speaker that outputs directional sound, and the
electrostatic speaker. A sound-permeable waterproof sheet provided on the front surface side for
preventing rainwater from entering the electrostatic speaker, a band-like anti-vibration member
for fixing the waterproof sheet, and the front surface side of the waterproof sheet And a sound
transmitting surface sheet provided.
[0009]
Further, another flat outdoor speaker according to the present invention is characterized in that,
in the above-mentioned invention, the electrostatic speaker and the frame member for fixing the
sheet are further provided.
[0010]
In the above-mentioned invention, the surface of the above-mentioned surface sheet is
constituted so that printing is possible, in the flat speaker for the outdoors concerning the
present invention.
[0011]
In the above-described invention, another flat outdoor speaker according to the present invention
is provided on the back side of the electrostatic speaker and has both waterproofness and sound
insulation to prevent rainwater from entering the electrostatic speaker. It further features a back
sheet.
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[0012]
Further, in another flat outdoor speaker according to the present invention, in the abovementioned invention, the sheet is coated with a coating layer for preventing adhesion of water
droplets, and this coating layer is of vinyl chloride type or urethane type. And at least one of
polyester resin, silicon resin and fluorine resin.
[0013]
In the above-mentioned invention, the sheet is characterized in that the sheet is covered with a
coating layer for preventing adhesion of ice and snow.
[0014]
Another flat outdoor speaker according to the present invention is characterized in that, in the
above-mentioned invention, the sheet is coated with a coating layer for imparting antifouling
properties.
[0015]
In the above-mentioned invention, another waterproof flat speaker according to the present
invention is characterized in that a waterproof fastener is provided around the surface sheet, and
the surface sheet can be replaced via the waterproof fastener. I assume.
[0016]
According to the flat outdoor speaker of the present invention, the flat flat speaker for outdoor
use, which is usable outdoors, is a flat electrostatic speaker that outputs directional sound, and
the surface side of the static speaker. Because it is equipped with a surface sheet that has both
waterproofness and sound transmission properties to prevent rainwater from entering the
electrostatic speaker, rainwater falling on the outdoor flat speaker is allowed to infiltrate into the
interior by the surface sheet on the surface side. It will be blocked, and the internal electrostatic
speaker will not get wet with rainwater.
On the other hand, the sound from the electrostatic speaker can be emitted to the outside
through the sound transmitting surface sheet.
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Therefore, even if rainwater or the like adheres to the surface, the function as the speaker is not
impaired, and it is possible to provide an outdoor flat speaker suitable for outdoor use.
[0017]
Further, according to another outdoor flat speaker according to the present invention, it is an
outdoor flat speaker that can be used outdoors, which is a flat electrostatic speaker that outputs
directional sound, and the above electrostatic type A sound-permeable waterproof sheet provided
on the surface side of a speaker for preventing rainwater from entering the electrostatic speaker,
a band-shaped anti-vibration member for fixing the waterproof sheet, and a surface of the
waterproof sheet Because it is equipped with a sound transmitting surface sheet provided on the
side, rainwater falling on the flat outdoor speaker is prevented from entering the interior by the
surface sheet and the waterproof sheet on the surface side, and the internal electrostatic speaker
is rainwater. Never get wet
On the other hand, the sound from the electrostatic speaker may be emitted to the outside
through the sound-permeable waterproof sheet and the surface sheet.
Therefore, even if rainwater or the like adheres to the surface, the function as the speaker is not
impaired, and it is possible to provide an outdoor flat speaker suitable for outdoor use.
[0018]
Further, according to another flat outdoor speaker according to the present invention, since the
electrostatic speaker and the frame member for fixing the sheet are further provided, for
example, the surface sheet of the surface is distorted by wind, so that the inside of the inside
sheet is kept quiet. If fixed to the frame member in a tensed state not to contact the electro-type
speaker, it is possible to provide an outdoor flat speaker having a wind resistant structure
suitable for use outdoors.
[0019]
Further, according to another flat outdoor speaker according to the present invention, since the
surface of the surface sheet is configured to be printable, the present invention is achieved by
printing visual information such as characters and figures on the surface of the surface sheet.
The outdoor flat speaker of the present invention can be used not only as an outdoor flat speaker
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for outputting directional sound, but also as an outdoor installation signboard for displaying
visual information.
[0020]
Further, according to another flat outdoor speaker according to the present invention, a back
sheet which is provided on the back side of the electrostatic speaker and has both
waterproofness and sound insulation to prevent rainwater from entering the electrostatic
speaker. Further, since the sound from the electrostatic speaker can be transmitted through the
sound transmission surface sheet on the front surface side and emitted to the outside on the
front surface side, the sound insulation is carried out by the sound insulation back sheet on the
rear surface side. It is not emitted to the outside on the back side.
Therefore, it is possible to output a predetermined sound to the front side while preventing noise
from being generated on the back side of the outdoor flat speaker.
Therefore, it is effective in the ability to provide the flat speaker for outdoor suitable for using at
the construction site etc. which adjoined the place where noise measures are required, such as a
private house.
[0021]
In addition, according to another flat outdoor speaker according to the present invention, the
sheet is coated with a coating layer for preventing adhesion of water droplets, and the coating
layer is made of vinyl chloride, urethane, or polyester. Since it is made of at least one of siliconbased and fluorine-based resins, water droplets such as rainwater adhering to the coating layer
that covers the sheet drip down by the action of gravity and do not enter the inside of the sheet.
This can prevent the electrostatic speaker inside the seat from getting wet.
Therefore, even if rainwater or the like adheres to the surface, the function as the speaker is not
impaired, and it is possible to provide an outdoor flat speaker suitable for outdoor use.
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[0022]
Further, according to another flat outdoor speaker according to the present invention, since the
sheet is coated with a coating layer for preventing adhesion of ice and snow, the ice and snow
due to snow and the like is covered by the coating layer covering the sheet. It does not adhere to
the sheet surface and slides downward by the action of gravity.
This can prevent the electrostatic speaker inside the seat from getting wet due to ice and snow.
In particular, when visual information such as characters and figures is printed on the surface of
the surface sheet, and the outdoor flat speaker provided with this surface sheet is used as a
signboard for outdoor installation, adhesion of ice and snow causes adhesion of the surface
sheet. It is possible to prevent in advance the situation where visual information such as
characters and figures becomes invisible from the outside.
Therefore, even when it snows, etc., not only the function as a speaker but also the function as a
signboard can be normally maintained.
[0023]
Further, according to another flat outdoor speaker according to the present invention, since the
sheet is coated with a coating layer for imparting antifouling properties, the coating layer
covering the sheet causes stains on the sheet surface. It produces an effect of being hard to
adhere.
[0024]
Further, according to another flat outdoor speaker according to the present invention, a
waterproof fastener is provided around the surface sheet, and the surface sheet can be replaced
via the waterproof fastener. The content of the visual information displayed on the surface can be
easily replaced as needed.
[0025]
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FIG. 1 is a schematic front view showing Embodiment 1 of the flat outdoor speaker according to
the present invention.
FIG. 2 is a schematic side view showing Embodiment 1 of the flat outdoor speaker according to
the present invention.
FIG. 3 is a diagram showing Embodiment 1 of the flat outdoor speaker according to the present
invention, and is a side cross-sectional view of a portion A of FIG.
FIGS. 4-1 is a figure which shows Embodiment 1 of the flat speaker for outdoor based on this
invention, and is a schematic front view showing a use condition. 4-2 is a figure which shows
Embodiment 1 of the flat speaker for outdoor based on this invention, and is a schematic side
view showing a use condition. FIG. 5 is a schematic front view showing Embodiment 2 of the flat
outdoor speaker according to the present invention. FIG. 6 is a schematic side view showing
Embodiment 2 of the outdoor flat speaker according to the present invention. FIG. 7 is a view
showing Embodiment 2 of the flat outdoor speaker according to the present invention, and is a
side sectional view of a portion A of FIG. FIGS. 8-1 is a figure which shows Embodiment 2 of the
flat speaker for outdoor which concerns on this invention, and is a schematic front view showing
the use condition. 8-2 is a figure which shows Embodiment 2 of the flat speaker for outdoor
based on this invention, and is a schematic side view showing a use condition. FIG. 9 is a
schematic front view showing a modification of the first and second embodiments of the flat
outdoor speaker according to the present invention.
[0026]
Hereinafter, embodiments of the flat outdoor speaker according to the present invention will be
described in detail based on the drawings. The present invention is not limited by this
embodiment.
[0027]
First Embodiment First, a first embodiment of the present invention will be described with
reference to FIGS.
[0028]
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As shown in FIG. 1, FIG. 2 and FIG. 3, the flat outdoor speaker 10 according to the first
embodiment is a flat flat outdoor speaker that can be used outdoors, and outputs a directional
voice. Of the electrostatic type speaker 12, the sound transmitting water-repellent sheet 14
(waterproof sheet), the acrylic belt-like anti-vibration member 16, the sound transmitting cloth
18 (surface sheet), and aluminum made of punching metal And a frame 20 (frame member).
The outdoor flat speaker 10 is in the form of a thin rectangular plate, and the external
dimensions thereof may be, for example, about 1000 mm in height, 800 mm in width, and 50
mm in thickness.
[0029]
Although not shown here, the electrostatic speaker 12 is composed of two electrodes facing each
other at intervals and a sheet-like vibrator having conductivity inserted between the two
electrodes. When a predetermined bias voltage is applied to the vibrating body and the voltage
applied to the electrode is changed, the electrostatic force acting on the vibrating body is
changed, whereby the vibrating body is displaced. If this applied voltage is changed according to
the acoustic signal, the vibrator repeatedly displaces and vibrates accordingly, and a
reproduction wave corresponding to the acoustic signal is generated from the vibrator. For this
reason, the sound from the electrostatic speaker 12 is emitted in the direction perpendicular to
the paper surface in the example of FIG. 1, and is emitted in the left-right direction in the
example of FIG.
[0030]
For example, a flat speaker (trade name: TLF speaker, TLF is a registered trademark)
manufactured by Yamaha Corporation can be used as the electrostatic speaker 12. The flat
speaker is (1) thin as 1.5 mm in the flat shape itself, (2) light weight as 460 g, (3) can be folded,
(4) small diffusion angle, strong directivity ( 5) It is difficult to attenuate the energy of the sound,
and (6) it has the feature that it can be heard as a clear whisper even under the noise
environment of the construction site.
[0031]
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The water repellent sheet 14 (waterproof sheet) is a water repellent sheet whose surface repels
water, and is for preventing rainwater from entering the electrostatic speaker 12. The water
repellent sheet 14 is a sound transmitting sheet so that both sides (surface side 12A and back
side 12B) of the electrostatic speaker 12 are spaced from the electrostatic speaker 12 and
covered. Provided.
[0032]
The anti-vibration member 16 is an acrylic belt-like member for fixing the water repellent sheet
14. The back surface side 14 B of the water repellent sheet 14 is in a mode in which it is stuck to
the front surface side 16 B of the steadying member 16 as a whole as a whole. As shown in FIG.
3, the anti-vibration member 16 is provided on both sides (surface side 12 A and back side 12 B)
of the electrostatic speaker 12 at a distance from the electrostatic speaker 12. Further, as shown
in FIG. 1, the anti-vibration member 16 is disposed along the left, right, upper and lower
peripheral edges of the outdoor flat speaker 10 and extends in the vertical direction in the width
direction of the outdoor flat speaker 10. It is arranged in three places in the center and the left
and right sides. Therefore, the water repellent sheet 14 is disposed as a film that is fixedly
supported by the respective anti-vibration members 16. The anti-vibration member 16 may be of
any material and shape as long as it can fix and support the water repellent sheet 14.
[0033]
The cloth 18 (surface sheet) is a sound transmitting material provided on the surface side of the
water repellent sheet 14, that is, on the outermost side of the outdoor flat speaker 10 at a
distance from the water repellent sheet 14 to cover it. , For example, made of fabric or cloth. The
surface of the cloth 18 is configured to enable high definition printing. By printing visual
information such as characters and figures on the surface of the cross 18, the outdoor flat
speaker 10 according to the first embodiment is not only an outdoor flat speaker that outputs
directional sound, but also visual information. It can also be used as a signboard or advertisement
for outdoor installation displaying.
[0034]
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The aluminum frame 20 (frame member) is made of punching metal for integrally fixing the
electrostatic speaker 12, the water repellent sheet 14, the anti-vibration member 16 and the
cross 18, and constitutes the outer frame of the flat outdoor speaker 10 It is The peripheral edge
portions of the electrostatic speaker 12, the water repellent sheet 14, and the anti-vibration
member 16 are fixed to the inside of the aluminum frame 20, and are fixed to support members
22a and 22b projecting inward. The support members 22a and 22b are fixed to the aluminum
frame 20 by means of a mounting bracket 24 made of a bolt or the like. The cloth 18 is fixed to
the rim portion 20 a of the aluminum frame 20 with its rim end housed and fixed. Although the
aluminum frame 20 has been described as an example of the frame member, the present
invention is not limited to this, and the electrostatic speaker 12, the water repellent sheet 14, the
anti-vibration member 16 and the cross 18 can be integrally fixed. Any material may be used.
[0035]
Here, the cross 18 is accommodated and fixed in the peripheral portion 20 a of the aluminum
frame 20 in a tension state where the cross 18 does not contact the internal electrostatic speaker
12 due to bending by wind. By doing this, the cloth 18 is not easily bent by the wind, and there is
no possibility that the cloth 18 contacts the internal electrostatic speaker 12. For this reason, it
can be set as the wind resistant structure suitable for using the planar speaker 10 for outdoors
outdoors.
[0036]
Incidentally, as shown in FIG. 1, the connector of the electrical wiring for the electrostatic
speaker 12 is stored in the inside of a connector waterproofing structure 26 provided in the
peripheral portion on the lower left side of the outdoor flat speaker 10.
[0037]
The operation and action of the above configuration will be described.
As shown in FIG. 4-1, FIG. 4-2 and FIG. 3, when rainwater falls on the outdoor flat speaker 10
installed on the mount 28, the cross 18 and the water repellent sheet 14 inside thereof
temporarily Rainwater deposited on the surface drops downward due to the action of gravity. For
this reason, the rainwater is prevented from entering the inside by the cloth 18 and the water
repellent sheet 14 on the front side, and the electrostatic speaker 12 inside is not wetted by the
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rain water. On the other hand, the sound S from the electrostatic speaker 12 can be emitted to
the outside through the sound transmitting water repellent sheet 14 and the cloth 18. Therefore,
according to the first embodiment, even if rainwater etc. temporarily adheres to the surface, the
function as the speaker is not impaired, and an outdoor flat speaker suitable for outdoor use is
provided. The effect of being able to
[0038]
In addition, since the outermost cross 18 is fixed to the aluminum frame 20 in such a tension
state that the outermost cross 18 does not contact the internal electrostatic speaker 12 by
bending by wind, the cross 18 can be easily bent by receiving wind. There is no risk that the
cross 18 will touch the internal electrostatic speaker 12.
[0039]
For this reason, the flat outdoor speaker 10 according to the first embodiment can be used as a
speaker capable of enduring wind and rain for a long time without losing the function as a
speaker in a wind and rain environment and outputting directional sound.
In particular, even if the flat outdoor speaker 10 according to the first embodiment is installed
outdoors for a long period of time, wind, rain water, etc. adhere to the surface or infiltrate into
the inside from the electrostatic speaker 12. It can be used normally for a long time without
causing any troubles such as loss of voice output, so it can be installed outdoors like a civil
engineering construction site such as dam work, tunnel work, large scale construction work, etc.
for a long time It is effective as a flat speaker to use.
[0040]
In particular, when there is a danger area such as a construction vehicle entrance or opening of a
lining at a civil engineering and construction work site, the sound from the outdoor flat speaker
10 provided in the vicinity is effective in alerting this danger area It is also possible to improve
the safety of the construction site. In addition, the flat outdoor speaker 10 according to the first
embodiment can be suitably used not only at a construction site but also at a commercial event
or the like held outdoors.
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[0041]
In the first embodiment described above, the cloth 18 (ie, a material made of fabric or cloth) has
been described as an example of the surface sheet, but the surface sheet used in the first
embodiment is limited to such a cloth. Instead, any material may be used as long as it is in the
form of a sound transmitting sheet. It is desirable that the surface sheet is configured to be
printable on the surface, and more preferably, the material is used for a signboard or a poster
application for advertisement.
[0042]
Second Embodiment Next, a second embodiment of the present invention will be described with
reference to FIGS. 5 and 8-2.
[0043]
As shown in FIG. 5, FIG. 6, and FIG. 7, the flat outdoor speaker 100 according to the second
embodiment is a flat flat speaker for outdoor use that can be used outdoors, and is flat for
outputting directional sound. Electrostatic speaker 32, a cross 34 (surface sheet) having both
waterproofness and sound transmission, a back sheet 36 having both waterproofness and sound
insulation, an acrylic belt-like anti-vibration member 38, and an aluminum frame 40 And (frame
member).
The outdoor flat speaker 100 is in the form of a thin rectangular plate, and its outer dimensions
may be, for example, about 1000 mm in height, 800 mm in width, and 50 mm in thickness.
[0044]
Although not shown here, the electrostatic speaker 32 is composed of two electrodes facing each
other at intervals and a sheet-like vibrator having conductivity inserted between the two
electrodes. When a predetermined bias voltage is applied to the vibrating body and the voltage
applied to the electrode is changed, the electrostatic force acting on the vibrating body is
changed, whereby the vibrating body is displaced. If this applied voltage is changed according to
the acoustic signal, the vibrator repeatedly displaces and vibrates accordingly, and a
reproduction wave corresponding to the acoustic signal is generated from the vibrator.
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Therefore, the sound from the electrostatic speaker 32 is emitted in the direction perpendicular
to the paper in the example of FIG. 5, and is emitted in the left-right direction in the example of
FIG.
[0045]
As this electrostatic speaker 32, for example, a flat speaker (trade name: TLF speaker, TLF is a
registered trademark) manufactured by Yamaha Corporation can be used. The flat speaker is (1)
thin as 1.5 mm in the flat shape itself, (2) light weight as 460 g, (3) can be folded, (4) small
diffusion angle, strong directivity ( 5) It is difficult to attenuate the energy of the sound, and (6) it
has the feature that it can be heard as a clear whisper even under the noise environment of the
construction site.
[0046]
The cross 34 (surface sheet) has both waterproofness and sound permeability to prevent
rainwater from entering the electrostatic speaker 32, and the front side 32A of the electrostatic
speaker 32, more specifically, a flat surface for outdoor use. The outermost side of the surface
side of the speaker 100 is spaced from the electrostatic speaker 32 to cover it. The cloth 34 can
be made of a water-repellent sound transmitting sheet whose surface repels water, and can be
made of, for example, a fabric or cloth having a water repellant property on its surface by a water
repellent coating or the like. Since the cross 34 is sound transmitting, sound from the
electrostatic speaker 32 can pass through the cross 34 and can be emitted from the surface side
of the outdoor flat speaker 100 to the outside. Further, the surface of the cloth 34 is configured
to enable high definition printing. By printing visual information such as characters and figures
on the surface of the cross 34, the outdoor flat speaker 100 according to the second embodiment
can be used not only as an outdoor flat speaker for outputting directional sound but also as
visual information. It can also be used as a signboard or advertisement for outdoor installation
displaying.
[0047]
The back sheet 36 has both waterproofness and sound insulation to prevent rainwater from
entering the electrostatic speaker 32, and is provided on the back side 32B of the electrostatic
speaker 32. More specifically, the back sheet 36 is provided on the outermost side of the back
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side of the outdoor flat speaker 100 so as to cover the electrostatic speaker 32 with a gap
therebetween. The back sheet 36 can be made of a water-repellent sound insulation sheet whose
surface repels water, for example, water repellant is imparted to the surface by a water repellent
coating or the like, and sound insulation is imparted to the back by a resin coating or the like. It
can be made of woven fabric or cloth. Since the back sheet 36 has sound insulation, sound from
the electrostatic speaker 32 can not pass through the back sheet 36, and sound can not be
emitted from the back side of the outdoor flat speaker 100 to the outside. Further, the surface of
the back sheet 36 (the surface on the side exposed to the outside of the outdoor flat speaker
100) may be configured to enable high definition printing. By printing visual information such as
characters and figures on the front surface of the back sheet 36, the back side of the flat outdoor
speaker 100 according to the second embodiment is used as a signboard or advertisement for
outdoor installation displaying visual information. be able to.
[0048]
The anti-vibration member 38 is an acrylic belt-like member for fixing the cross 34 and the back
sheet 36, and as shown in FIG. 7, on both sides (front side 32A and back side 32B) of the
electrostatic speaker 32. It is provided spaced from the electrostatic speaker 32. In the second
embodiment, the back side 34B of the cross 34 is generally adhered to the front side 38A of the
steadying member 38 in some places. Similarly, the back side 36B of the back sheet 36 is
generally adhered to the front side 38A of the anti-vibration member 38 in some places. Further,
as shown in FIG. 5, the anti-vibration member 38 is disposed along the left, right, upper and
lower peripheral edges of the outdoor flat speaker 100, and extends in the vertical direction in
the width direction of the outdoor flat speaker 100. It is arranged in three places in the center
and the left and right sides. Therefore, the cloth 34 and the back sheet 36 are arranged as a filmlike member fixedly supported by the respective anti-vibration members 38. The anti-vibration
member 38 may be of any material and shape as long as it can fix and support the cross 34 and
the back sheet 36.
[0049]
The aluminum frame 40 (frame member) is a member for integrally fixing the electrostatic
speaker 32, the cross 34, the back sheet 36, and the anti-vibration member 38, and constitutes
the outer frame of the outdoor flat speaker 100. It is. The respective peripheral end portions of
the electrostatic speaker 32 and the anti-vibration member 38 are fixed to the inside of the
aluminum frame 40, and are fixed to support members 42a and 42b projecting inward. The
support members 42a and 42b are fixed to the aluminum frame 40 by a mounting bracket 44 or
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the like made of bolts. The cloth 34 and the back sheet 36 are respectively fixed to the peripheral
edge portion 40 a of the aluminum frame 40 with the peripheral end portions thereof
accommodated. Although the aluminum frame 40 has been described as an example of the frame
member, the present invention is not limited to this, and the electrostatic speaker 32, the cross
34, the back sheet 36 and the anti-vibration member 38 can be integrally fixed. If it is, what kind
of material may be used.
[0050]
Here, the cloth 34 and the back surface sheet 36 are accommodated and fixed in the peripheral
portion 40 a of the aluminum frame 40 in a tension state where the cross 34 and the back
surface sheet 36 do not contact the internal electrostatic speaker 32 due to bending by wind. By
doing this, the cloth 34 and the back sheet 36 do not easily bend due to the wind, and there is no
possibility that the cloth 34 and the back sheet 36 come in contact with the internal electrostatic
speaker 32. For this reason, it can be set as the wind resistant structure suitable for using the flat
speaker 100 for outdoors outdoors.
[0051]
As shown in FIG. 5, the connector of the electrical wiring for the electrostatic speaker 32 is
stored in the inside of a connector waterproofing structure 46 provided on the peripheral portion
on the lower left side of the outdoor flat speaker 100.
[0052]
The operation and action of the above configuration will be described.
As shown in FIG. 8-1, FIG. 8-2 and FIG. 7, when rainwater falls on the outdoor flat speaker 100
installed on the mount 48, it temporarily adheres to the surface of the cross 34 and the back
sheet 36. Rainwater drops downward due to the action of gravity. For this reason, the rainwater
is prevented from entering the inside by the cloth 34 on the front side and the back sheet 36 on
the back side, and the electrostatic speaker 32 inside is not wetted by the rain water. On the
other hand, the sound S from the electrostatic speaker 32 can be emitted from the surface side to
the outside through the sound transmission cloth 34 on the surface side. Further, the sound S
from the electrostatic speaker 32 is sound-insulated by the sound-insulating back sheet 36 on
the back side, and is not emitted to the outside from the back side. Therefore, according to the
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16
second embodiment, even if rainwater etc. is temporarily attached to the surface, the function as
the speaker is not impaired, and an outdoor flat speaker suitable for outdoor use is provided. The
effect of being able to Further, according to the second embodiment, it is possible to output a
predetermined sound S only to the front side while preventing noise from being generated on the
back side of the outdoor flat speaker 100.
[0053]
In addition, since the outermost cross 34 and the back sheet 36 are fixed to the aluminum frame
40 in such a tension state that they do not contact the internal electrostatic speaker 32 due to
the bending by the wind, the cross 34 and the back sheet 36 As a result, the cloth 34 and the
back sheet 36 do not have to be in contact with the electrostatic speaker 32 inside.
[0054]
For this reason, the flat outdoor speaker 100 according to the second embodiment can be used
as a speaker capable of enduring wind and rain for a long time and outputting directional sound
without impairing the function as a speaker in a wind and rain environment.
In particular, even if the flat outdoor speaker 100 according to the second embodiment is
installed outdoors for a long period of time, wind, rain water, etc. adhere to the surface or
infiltrate into the inside from the electrostatic speaker 32. It can be used normally for a long time
without causing any troubles such as loss of voice output, so it can be used outdoors for civil
engineering construction sites such as dam construction, tunnel construction, large scale
construction, etc. and information signs in factories. It is effective as a flat speaker installed in
and used for a long time.
[0055]
In particular, when there is a danger area such as a construction vehicle entrance or opening of a
lining at a civil engineering and construction work site, or at the entrance of the danger area in a
factory, by the sound from the outdoor flat speaker 100 provided in the vicinity. It is also
possible to effectively alert the danger area, which can contribute to the improvement of the
safety of the construction site.
[0056]
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Further, for example, if the outdoor flat speaker 100 is disposed so that the dangerous area side
of the construction site is on the front side and the private house side is on the back side, the
voice from the electrostatic speaker 32 is directly output to the private house side. Can be
prevented.
Therefore, the flat outdoor speaker 100 according to the second embodiment is suitable for use
at a construction site adjacent to a place such as a home where a noise countermeasure is
required. Moreover, the flat outdoor speaker 100 according to the second embodiment can be
suitably used not only at a construction site or a factory but also at a commercial event or the
like held outdoors.
[0057]
In the second embodiment described above, the material of the surface sheet (cross 34) is made
of fabric or cloth as an example, but the surface sheet used in the second embodiment is not
limited to this. Any material may be used as long as it is in the form of a waterproof and sound
transmitting sheet. It is desirable that the surface sheet is configured to be printable on the
surface, and more preferably, the material is used for a signboard or a poster application for
advertisement.
[0058]
In the second embodiment described above, although the back sheet 36 is made of a material
made of fabric, cloth or the like, the back sheet used in the second embodiment is not limited to
this, and the waterproof property is waterproof. Any material may be used as long as it is in the
form of a sheet having sound insulation properties. It is desirable that the back sheet is
configured to be printable on its front surface, and more preferably, it is made of a material used
for a signboard or a poster application for advertisement.
[0059]
In the first and second embodiments described above, the top sheet (cross 18, 34), back sheet
36, and water repellent sheet 14 (waterproof sheet) are coated with a coating layer for
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preventing adhesion of water droplets. It may consist of In this case, the coating layer can be
composed of at least one of vinyl chloride resin, urethane resin, polyester resin, silicon resin and
fluorine resin. As the fluorine-based resin, for example, a Teflon (registered trademark) -based
resin can be used. For example, a polyester cloth may be provided with a coating layer
comprising at least one of vinyl chloride resin, urethane resin, and polyester resin to impart
waterproofness or water repellency. In addition, a polyester cloth or a coated polyester cloth may
be coated with a coating layer composed of at least one of a silicon-based resin and a fluorinebased resin to improve water repellency and stain resistance.
[0060]
In the first and second embodiments, the top sheet (cross 18, 34) and the back sheet 36 may be
coated with a coating layer for preventing adhesion of ice and snow. In this case, the ice and
snow resulting from snowfall and the like does not adhere to the sheet surface by the coating
layer that covers the sheet, and slides downward by the action of gravity. This can prevent the
electrostatic speaker inside the seat from getting wet due to ice and snow. In particular, when
visual information such as characters and figures is printed on the surface of the surface sheet,
and the outdoor flat speaker provided with this surface sheet is used as a signboard for outdoor
installation, adhesion of ice and snow causes adhesion of the surface sheet. It is possible to
prevent in advance the situation where visual information such as letters can not be seen from
the outside. Therefore, even when it is used in snowfall or heavy snowfall areas, not only the
function as a speaker but also the function as a signboard can be normally maintained.
[0061]
In the first and second embodiments described above, the aluminum frame is described as an
example of the frame member for fixing the electrostatic speaker, the front sheet, the back sheet,
the anti-vibration member, etc., but the present invention is limited thereto For example, a
structure as shown in FIG. 9 may be employed. The outdoor flat speaker 200 having this
structure is configured by joining the inner peripheral edge portion 50a of the rectangular frameshaped frame member 50 and the outer peripheral edge portion 52a of the rectangular surface
sheet 52 with the waterproof fastener 54. Here, the top sheet 52 corresponds to the cloths 18
and 34 described in the first and second embodiments, and the frame member 50 corresponds to
the aluminum frames 20 and 40.
[0062]
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In this way, since the front sheet 52 can be easily attached and detached by opening and closing
the waterproof fastener 54, the contents of the visual information displayed on the front surface
of the front sheet 52 can be easily replaced as necessary.
[0063]
As described above, according to the flat outdoor speaker of the present invention, it is a flat flat
speaker for outdoor use that can be used outdoors, and is a flat electrostatic speaker that outputs
directional sound; A surface sheet provided on the surface side of the electrostatic speaker and
having waterproofness and sound transmission properties to prevent rainwater from entering the
electrostatic speaker is provided, so that rainwater falling on the outdoor flat speaker is the
surface sheet on the surface side Prevents the internal electrostatic penetration from getting wet
with rainwater.
On the other hand, the sound from the electrostatic speaker can be emitted to the outside
through the sound transmitting surface sheet. Therefore, even if rainwater or the like adheres to
the surface, the function as a speaker is not impaired, and an outdoor flat speaker suitable for
outdoor use can be provided.
[0064]
Further, according to another outdoor flat speaker according to the present invention, it is an
outdoor flat speaker that can be used outdoors, which is a flat electrostatic speaker that outputs
directional sound, and the above electrostatic type A sound-permeable waterproof sheet provided
on the surface side of a speaker for preventing rainwater from entering the electrostatic speaker,
a band-shaped anti-vibration member for fixing the waterproof sheet, and a surface of the
waterproof sheet Because it is equipped with a sound transmitting surface sheet provided on the
side, rainwater falling on the flat outdoor speaker is prevented from entering the interior by the
surface sheet and the waterproof sheet on the surface side, and the internal electrostatic speaker
is rainwater. Never get wet On the other hand, the sound from the electrostatic speaker may be
emitted to the outside through the sound-permeable waterproof sheet and the surface sheet.
Therefore, even if rainwater or the like adheres to the surface, the function as a speaker is not
impaired, and an outdoor flat speaker suitable for outdoor use can be provided.
[0065]
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Further, according to another flat outdoor speaker according to the present invention, since the
electrostatic speaker and the frame member for fixing the sheet are further provided, for
example, the surface sheet of the surface is distorted by wind, so that the inside of the inside
sheet is kept quiet. If it fixes to a frame member in the tense state which does not contact an
electro-type speaker, the flat flat speaker of the wind-resistant structure suitable for using it
outdoors can be provided.
[0066]
Further, according to another flat outdoor speaker according to the present invention, since the
surface of the surface sheet is configured to be printable, the present invention is achieved by
printing visual information such as characters and figures on the surface of the surface sheet.
The outdoor flat speaker can be used not only as an outdoor flat speaker outputting directional
sound but also as an outdoor installation signboard displaying visual information.
[0067]
Further, according to another flat outdoor speaker according to the present invention, a back
sheet which is provided on the back side of the electrostatic speaker and has both
waterproofness and sound insulation to prevent rainwater from entering the electrostatic
speaker. Further, since the sound from the electrostatic speaker can be transmitted through the
sound transmission surface sheet on the front surface side and emitted to the outside on the
front surface side, the sound insulation is carried out by the sound insulation back sheet on the
rear surface side. It is not emitted to the outside on the back side.
Therefore, it is possible to output a predetermined sound to the front side while preventing noise
from being generated on the back side of the outdoor flat speaker.
Therefore, it is possible to provide an outdoor flat speaker suitable for use at a construction site
adjacent to a place where noise control is required, such as a private house.
[0068]
In addition, according to another flat outdoor speaker according to the present invention, the
sheet is coated with a coating layer for preventing adhesion of water droplets, and the coating
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layer is made of vinyl chloride, urethane, or polyester. Since it is made of at least one of siliconbased and fluorine-based resins, water droplets such as rainwater adhering to the coating layer
that covers the sheet drip down by the action of gravity and do not enter the inside of the sheet.
This can prevent the electrostatic speaker inside the seat from getting wet. Therefore, even if
rainwater or the like adheres to the surface, the function as a speaker is not impaired, and an
outdoor flat speaker suitable for outdoor use can be provided.
[0069]
Further, according to another flat outdoor speaker according to the present invention, since the
sheet is coated with a coating layer for preventing adhesion of ice and snow, the ice and snow
due to snow and the like is covered by the coating layer covering the sheet. It does not adhere to
the sheet surface and slides downward by the action of gravity. This can prevent the electrostatic
speaker inside the seat from getting wet due to ice and snow. In particular, when visual
information such as characters and figures is printed on the surface of the surface sheet, and the
outdoor flat speaker provided with this surface sheet is used as a signboard for outdoor
installation, adhesion of ice and snow causes adhesion of the surface sheet. It is possible to
prevent in advance the situation where visual information such as characters and figures
becomes invisible from the outside. Therefore, even when it snows, etc., not only the function as
a speaker but also the function as a signboard can be normally maintained.
[0070]
Further, according to another flat outdoor speaker according to the present invention, since the
sheet is coated with a coating layer for imparting antifouling properties, the coating layer
covering the sheet causes stains on the sheet surface. It is hard to adhere.
[0071]
Further, according to another flat outdoor speaker according to the present invention, a
waterproof fastener is provided around the surface sheet, and the surface sheet can be replaced
via the waterproof fastener. The contents of visual information displayed on the surface can be
easily replaced as needed.
[0072]
As described above, the flat outdoor speaker according to the present invention is useful as a
speaker capable of enduring wind and rain for a long time without impairing the function as a
speaker under wind and rain environment and outputting directional sound, in particular, in a
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dam construction It is suitable for long-term use by installing it outdoors such as a civil
engineering construction site such as tunnel construction and large-scale construction
construction, and a signboard in a factory.
[0073]
10, 100, 200 Flat-panel speaker 12, 32 for outdoor use Electrostatic speaker 14 Water-repellent
sheet (waterproof sheet) 16, 38 Anti-vibration member 18, 34 Cross (surface sheet) 20, 40
Aluminum frame (frame member) 20a, 40a Aluminum rims 22a, 22b, 42a, 42b Support members
24, 44 Mounting brackets 26, 46 Waterproof structure for connectors 28, 48 Mounting frame
50 Frame member 52 Surface sheet 54 Waterproof fastener 36 Back sheet 12A, 32A for
electrostatic speakers Front side 12B, 32B Electrostatic speaker back side 14B Water repellent
sheet back side 16B Anti-vibration member front side
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