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DESCRIPTION JP2011223397

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DESCRIPTION JP2011223397
An object of the present invention is to realize a speaker device having a simple configuration in
which an object can be placed. The cabinet comprises a cabinet having a tubular shape with one
end opened, and a sound generator disposed on the other end of the cabinet and driven based on
an audio signal, and the cabinet is first installed when the cabinet is installed. By forming a sealed
space by the mounting surface and the mounting surface, the bottom surface becomes
unnecessary and the configuration can be simplified, and it becomes easy to place an object
inside the cabinet. [Selected figure] Figure 10
Speaker device
[0001]
The present invention relates to a speaker device, and is suitably applied to a speaker device in
which an object can be placed inside a cabinet.
[0002]
Heretofore, there has been proposed a speaker in which a viewing object is accommodated in a
cube-shaped transparent case, and a display-like element in which a speaker body is fixed is
added to one surface of the transparent case (see, for example, Patent Document 1).
[0003]
Utility model registration 3105852 gazette
14-04-2019
1
[0004]
By the way, in the speaker described in Patent Document 1 mentioned above, since it has a
structure via the opening and closing door, there is little freedom in taking in and out of an
appreciation thing, and when trying to configure the transparent case in a special shape, the
bottom exists. There is a problem that processing and molding are difficult because of the
[0005]
Moreover, in the speaker of patent document 1, although a transparent case is used, since a
speaker unit itself is not transparent, it can not be said that it is completely transparent but the
problem that it is intercepted by the said speaker unit and it is hard to see an appreciation thing.
was there.
[0006]
The present invention has been made in consideration of the above points, and an object thereof
is to propose a speaker device having a simple configuration in which an object can be placed.
[0007]
In order to solve the problems, in the present invention, the case includes a cylindrical case
having an open end, and a sound generator disposed on the other end side of the case and driven
based on an audio signal. An enclosed space is formed by the housing and the mounting surface
when the body is installed, and by functioning as a cabinet, the bottom surface becomes
unnecessary and the configuration can be simplified, and an object is placed inside the housing
Becomes easy.
[0008]
According to the present invention, the casing is provided with a casing having a tubular shape
with one end opened, and a sound generator disposed on the other end of the casing and driven
based on an audio signal, and the casing is installed When the sealed space is formed by the case
and the installation surface, and the cabinet functions as a cabinet, the bottom surface becomes
unnecessary, the structure can be simplified, and it becomes easy to place an object inside the
case, Thus, it is possible to realize a speaker device having a simple configuration in which an
object can be placed inside.
[0009]
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2
It is a general | schematic line perspective view which shows the whole external appearance
structure (1) of a speaker apparatus.
It is a general | schematic line perspective view which shows the whole external appearance
structure (2) of a speaker apparatus.
It is an approximate line perspective view showing the whole appearance composition (3) of a
speaker device.
It is an approximate line sectional view showing the section composition of a speaker device.
FIG. 5 is a schematic bottom view showing the lower surface configuration of the lower body in
the main body portion.
They are a top view, a bottom view, and a side view showing the appearance composition of a
speaker device.
It is a schematic diagram which shows the edge part structure of a transparent housing | casing.
It is a rough-line block diagram which shows the structure (1) of a drive system.
It is a rough-line block diagram which shows the structure (2) of a drive system. FIG. 7 is a
schematic perspective view for describing a state in which an object is exhibited inside the
transparent housing. It is an approximate line perspective view showing sound image localization
in the case of only a speaker unit. It is a general-line perspective view showing sound image
localization at the time of using a transparent case as a diaphragm and cabinet. It is an
approximate line sectional view showing signs that light propagates the inside of a cabinet and
irradiates an installation side. It is an approximate line perspective view showing the lighting
state of lighting.
[0010]
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3
Hereinafter, modes for carrying out the invention will be described. The description will be made
in the following order. 1. Embodiment 2. Other embodiments
[0011]
<1. Embodiment> [1-1. Structure of Speaker Device] As shown in FIGS. 1 to 5, the speaker
device 1 has a substantially cylindrical shape as a whole, and a transparent housing 2 having a
shape which is expanded as it goes to the hem, and the transparent housing It is comprised by
the main-body part 3 which makes a substantially elliptical shape with predetermined thickness
mounted above 2 and.
[0012]
The upper end of the transparent housing 2 (FIG. 3) is opened in the same substantially elliptical
shape as the main body 3, while the lower end is opened in a substantially wedge shape unlike
the upper portion. The outer surface (FIGS. 1 to 3) from the top to the bottom is shaped by a
smooth curve.
[0013]
In addition, the transparent housing 2 as a whole constitutes a cylindrical diaphragm, and is
formed of, for example, a transparent acrylic resin having light transmitting or light guiding
properties and a thickness of 5 mm, and the user visually confirms the inside from the outside It
is made to be possible.
[0014]
Since the transparent housing 2 has a shape in which the other lower end is opened, when the
speaker device 1 is installed for an installation object such as a floor or a wall, the transparent
housing 2 is It is the structure which forms the sealed space where the internal space is sealed
for the first time.
[0015]
The main body 3 (FIG. 4) uses, for example, brass as a material, and includes an upper body 3A
made of a thin plate and a lower body 3B in which a storage hole 3C for storing the speaker unit
4 is formed. It is constituted by being pasted together.
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4
[0016]
The main body portion 3 is housed and fixed with the speaker unit 4 facing upward to the
housing hole 3C of the lower body 3B, and the mesh-like fine through hole 3H provided on the
upper surface of the upper body 3A (FIG. And the sound wave (positive phase) of the low
frequency range outputted from the front surface of the speaker unit 4 via FIG. 4) is directly
radiated.
[0017]
Although not shown, a power supply battery and an amplifier are accommodated in the lower
body 3B of the main body 3, and the speaker unit 4 is made to function as an active speaker.
However, the amplifier does not necessarily have to be accommodated, and it may function only
as a passive speaker without the built-in amplifier.
[0018]
The lower body 3B (FIGS. 4 and 5) of the main body 3 has a total of six LED bulbs 6 attached in
such a manner as to surround the periphery of the storage hole 3C.
Incidentally, instead of the LED bulb 6, it may be simply an LED.
Further, in the lower body 3B (FIG. 4), a donut-shaped diffusion plate 7 is attached to a projecting
portion 3D corresponding to the housing hole 3C of the lower body 3B so as to cover the LED
bulb 6.
[0019]
Thus, the speaker device 1 diffuses the irradiation light from the LED light bulb 6 by the
diffusion plate 7 and passes the inside of the transparent housing 2 as the diffused light and then
irradiates the open end side of the transparent housing 2 It is done.
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5
[0020]
In addition, in the lower body 3B (FIG. 4) of the main body portion 3, for example, a total of four
piezoelectric actuators 5 are built in, and in a state in contact with the end face of the upper end
of the transparent housing 2 It is attached to the said end surface at equal intervals.
[0021]
The piezoelectric actuator 5 is a voltage drive type, and the displacement direction of the
piezoelectric actuator 5 by a drive rod (not shown) is orthogonal to the end face.
[0022]
Incidentally, although four piezoelectric actuators 5 are used in the present embodiment, the
present invention is not limited to this. For example, a current drive type magnetostrictive
actuator, or other electrodynamic actuators can be used. .
[0023]
In this case, since the voltage-driven piezoelectric actuator 5 is used in the speaker device 1, the
current consumption is reduced compared to the current-driven type, and as a result, the heat
generation amount is reduced and the battery use time is increased. It will have.
[0024]
In this case, the displacement direction by the piezoelectric actuator 5 is also the direction
(surface direction) from the upper side to the lower side of the transparent housing 2.
In the speaker device 1, by arranging the piezoelectric actuator 5 in such a state, the transparent
housing 2 is vibrated from the end surface on the upper end portion side of the transparent
housing 2 with a vibration component in a direction orthogonal to the end surface. It is made to
get.
[0025]
At this time, the end face on the upper end side of the transparent casing 2 is excited by the
longitudinal wave, and the vibration elastic wave is mixed in the longitudinal wave and the
transverse wave by propagating in the direction from the upper side to the lower side of the
transparent casing 2 It is emitted as a wave to the transparent housing 2 to form a uniform
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6
sound image over the entire height of the transparent housing 2.
[0026]
Thus, the transparent housing 2 constitutes a speaker serving as the high frequency side of the
audio frequency band to function as a tweeter, while the speaker unit 4 serves as a loudspeaker
serving as the low frequency side of the audio frequency band to function as a woofer. ing.
[0027]
In practice, as shown in FIGS. 6A to 6D, the transparent housing 2 (FIG. 6B) of the speaker device
1 has a length of 318 in the longitudinal direction at the open portion provided below it. The
length in the lateral direction is 246.5 mm.
[0028]
In the transparent housing 2 (FIG. 6B), one side is perpendicular to the lower side from the upper
side to the lower side where the main body portion 3 is attached, while the other side is relative
to the lower side The inclination is a predetermined angle.
[0029]
Further, in the transparent casing 2 (FIG. 6A), the diameter of the large bowl-shaped bulging
portion is 211.3 mm in diameter, and the other side is inclined at a predetermined angle with
respect to the lower side. It is made to have a shape that is expanded as a whole as it goes round
to the hem.
[0030]
Further, the main body portion 3 of the speaker device 1 has a length of 104.4 mm in the lateral
direction and a thickness of 25.5 mm, and the diffusion plate 7 slightly protrudes from the lower
side of the main body portion 3 A code 3F for supplying an audio signal to the unit 3 is
connected.
[0031]
By the way, as shown in FIG. 7, in the transparent housing 2 of the speaker device 1, a rubberbased buffer material 12 is adhered or fitted on the peripheral end of the open lower end
portion.
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7
Thereby, when the transparent housing 2 operates as a cylindrical diaphragm in a state where
the speaker device 1 is installed on an installation target such as a floor or a wall, the speaker
device 1 vibrates the transparent housing 2. Transmission to the installation surface is prevented
by the shock absorbing material 12, and generation of chattering noise is avoided in advance.
[0032]
In the speaker device 1 in this case, since a relatively heavy main body 3 (for example, 500 g to 1
kg) made of brass is mounted on the upper end portion of the transparent housing 2, the
installation object The pressing force on the transparent housing 2 placed on the top becomes
stronger.
[0033]
Here, since the rubber-based shock absorbing material 12 is attached on the peripheral end of
the lower end portion of the transparent housing 2, the installation state of the transparent
housing 2 and the installation surface becomes firm.
As a result, even when the transparent housing 2 operates as a cylindrical diaphragm, the
speaker device 1 can maintain the sealing degree of the sealed space by the transparent housing
2.
[0034]
At this time, in the speaker device 1, since the sound wave of the reverse phase output from the
back surface of the speaker unit 4 is not confined in the sealed space of the transparent housing
2 and radiated to the outside, the adverse effect by the sound wave of the reverse phase is It is
designed to prevent something from happening.
[0035]
Incidentally, the transparent housing 2 is not only formed of a light transmitting or light
transmitting transparent acrylic resin, but may contain a fluorescent paint.
[0036]
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8
As this fluorescent paint, for example, the fluorescent paint Lumogen F (registered trademark)
Dyes for plastics by BASF can be used.
[0037]
In fact, in the transparent housing 2, by containing the fluorescent paint of about 0.02% of the
mass in the acrylic resin which is the material, the transparent housing 2 collects the light on the
entire surface, and the edge Emits strong fluorescence).
[0038]
As Lumogen F (registered trademark) Dyes, Orange 240 (trade name), Yellow 083 (trade name),
Red 305 (trade name), and the like exist.
[0039]
For example, when Orange 240 (trade name) is included, the entire transparent housing 2 looks
transparent orange, and the upper end surface and the lower end surface strongly glow orange.
[0040]
Further, in the transparent housing 2, when the outer surface is scratched to draw a character,
the character portion emits light strongly.
This character portion emits light by an external fluorescent lamp, sunlight, or the like without
lighting the LED bulb 6.
[0041]
Therefore, in the speaker device 1, even when the LED bulb 6 is turned off, under the use
environment where external light is given to the transparent housing 2, the character portion
drawn on the transparent housing 2 can be easily given to the user. It is designed to allow visual
confirmation.
[0042]
This Lumogen F (registered trademark) Dyes is also excellent in light resistance (fluorescence
residual rate), and in the transparent housing 2 in which Orange 240 (trade name) is included,
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9
when the fluorescence intensity before exposure is 100, 2000 under constant conditions The
fluorescence intensity after time exposure is 85.
[0043]
[1−2.
Configuration of Drive System of Speaker Device] Next, two types of drive systems of the speaker
device 1 will be described.
[0044]
As shown in FIG. 8, in the speaker device 1, for example, the left audio signal AL and the right
audio signal AR constituting a stereo audio signal are input to the adder 121, and the adder 121
outputs the left audio signal AL and the right audio signal AR. To generate a monaural audio
signal SA, which is then sent to the high pass filter 122 and the low pass filter 123.
[0045]
The high pass filter 122 extracts only the high frequency component SAH from the monaural
sound signal SA, and sends the high frequency component SAH to four signal processing units
124A to 124D, each of which is a DSP (Digital Signal Processor).
[0046]
The four signal processing units 124A to 124D perform processing (hereinafter referred to as
sound field control processing) for adjusting the level, delay time, frequency characteristics and
the like to the high frequency component SAH, respectively, and four piezoelectric actuators A
signal correction process on the output characteristics of No. 5 is performed, and the highfrequency component signals SAH1 to SAH4 obtained as a result are respectively sent to four
amplifiers 125A to 125D.
[0047]
The amplifiers 125A to 125D amplify the high frequency component signals SAH1 to SAH4 to
predetermined levels, and then supply these as drive signals to the four piezoelectric actuators 5
(5A to 5D).
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10
[0048]
As a result, drive rods (not shown) of the four piezoelectric actuators 5 (5A to 5D) are driven by
the independent high frequency component signals SAH1 to SAH4, respectively, to excite the
transparent housing.
[0049]
The low pass filter 123 extracts the low frequency component SAL from the monaural sound
signal SA, and sends it to the signal processing unit 127 formed of a DSP.
The signal processing unit 127 performs processing for adjusting the level, delay time, frequency
characteristics, and the like (hereinafter referred to as sound field control processing) on the low
frequency component SAL, and amplifies the signal to a predetermined level via the amplifier
128. This is sent to the speaker unit 4 as a drive signal.
As a result, the speaker unit 4 is driven by the low frequency component SAL.
[0050]
Thus, the speaker device 1 functions as a woofer by driving the speaker unit 4 with the low
frequency component SAL and as a tweeter by exciting the transparent housing 2 with the high
frequency component signals SAH1 to SAH4. Since the function can be achieved, the
reproduction frequency band of the entire speaker device 1 can be expanded.
[0051]
The speaker device 1 can excite the transparent housing 2 by using the high-frequency
component signals SAH1 to SAH4 independent of each of the four piezoelectric actuators 5 as
drive signals. The sound image can be expanded to the outside of the
[0052]
On the other hand, as shown in FIG. 9, the speaker device 1 is roughly divided into a DSP block
201, an amplifier block 202, and an amplifier 203.
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11
The DSP block 201 includes a signal correction and sound field control unit 201A on the
piezoelectric actuator 5 side and a signal correction and sound field control unit 201B on the
speaker unit 4 side.
[0053]
The signal correction and sound field control unit 201A on the piezoelectric actuator 5 side
corresponds to the four piezoelectric actuators 5 (5A to 5D), and includes four signal processing
units 211 (211A to 211D) and four high pass filters. 212 (212A-212D).
[0054]
Furthermore, the signal correction and sound field control unit 201A attenuates the left audio
signal AL and the right audio signal AR, which constitute stereo audio signals, to the four signal
processing units 211 and inputs eight attenuators (210A1, 210A2, 210B1, 210B2,..., 210D1,
210D2).
[0055]
The individual signal processing units 211 (211A to 211D) adjust the signal levels, delay times,
frequency characteristics, etc. of the left audio signal AL and the right audio signal AR
respectively input, and further, the left audio signal AL and the right audio signal AL. While
performing mixing processing (sound field control processing) on the signal AR, signal correction
processing on output characteristics of the piezoelectric actuators 5 (5A to 5D) is performed.
[0056]
The individual high-pass filters 212 (212A to 212D) extract high-frequency components of the
audio signals supplied from the signal processing units 211 (211A to 211D), and send them to
the respective amplifiers 202A to 202D of the amplifier block 202. Do.
[0057]
In this case, sound signals obtained as a result of performing sound field control processing and
signal correction processing on the four piezoelectric actuators 5 (5A to 5D) independently of
each other by the signal correction and sound field control unit 201A of the DSP block 201. The
high-frequency component of the signal is supplied after being amplified by the amplifier block
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12
202.
By driving the four piezoelectric actuators 5 (5A to 5D) with the high frequency components
subjected to the sound field control processing as described above, it is possible to enhance the
sense of sound spreading by the high frequency sound output.
[0058]
On the other hand, the signal correction and sound field control unit 201B on the side of the
speaker unit 4 includes one signal processing unit 221 and one low pass filter 222
corresponding to the speaker unit 4, and the signal processing unit 221 further includes stereo
sound. The two attenuators 220A1 and 220A2 are provided to attenuate and input the left audio
signal AL and the right audio signal AR that constitute the signal.
[0059]
The signal processing unit 221 adjusts the signal levels, delay time, frequency characteristics, etc.
of the left audio signal AL and the right audio signal AR, and further performs mixing processing
on the left audio signal AL and the right audio signal AR (sound field control processing) And
perform signal correction processing relating to resonance tube characteristics.
The low pass filter 222 extracts the low frequency component of the audio signal supplied from
the signal processing unit 221, and sends it to the amplifier 203.
[0060]
In this case, in the speaker unit 4, the low frequency component of the audio signal obtained by
performing the sound field control processing and the signal correction processing by the signal
correction of the DSP block 201 and the sound field control unit 201 B is amplified by the
amplifier 203. It will be supplied later.
As described above, the speaker unit 4 is driven by the low-frequency component subjected to
the sound field control processing, so that it is possible to enhance the sense of spreading of the
sound due to the low-frequency sound output.
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[0061]
The order of the signal processing unit 211 (211A to 211D) of the signal correction and sound
field control unit 201A and the high pass filter 212 may be reversed, and similarly, the signal
processing unit 221 and the low pass of the signal correction and sound field control unit 201B
The order with the filter 222 may be reversed.
[0062]
[1−3.
Operation of Speaker Device] Next, the operation of the speaker device 1 (FIGS. 1 to 4) will be
described.
[0063]
In the speaker device 1, the four piezoelectric actuators 5 (5 A to 5 D) provided in the main body
3 are driven by the left audio signal AL and the right audio signal AR, and this end face is viewed
from the end face of the transparent housing 2 at the upper end The transparent casing 2 is
vibrated by the vibration component in the direction orthogonal to the direction.
[0064]
At this time, the end face on the upper end portion side of the transparent housing 2 is excited by
the longitudinal wave, and the elastic wave (vibration) propagates in the direction (surface
direction) from the upper side to the lower side of the transparent housing 2.
Then, when the elastic wave propagates through the transparent casing 2, mode conversion of
longitudinal waves, transverse waves, longitudinal waves,... Is repeated to become a mixed wave
of longitudinal waves and transverse waves, and the plane of the transparent casing 2 is
generated by the transverse waves. Vibration in the inward direction (direction perpendicular to
the surface) is excited.
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14
[0065]
Thus, the speaker device 1 emits a sound wave from the transparent housing 2.
That is, the speaker device 1 can obtain an audio output of a high range from the outer surface of
the transparent housing 2.
[0066]
At this time, since the lower side of the transparent housing 2 is closed by the installation surface
with the installation object, the speaker device 1 is transparent for the sound wave of the reverse
phase generated inside the transparent housing 2. It is confined inside the body 2 and does not
emit outside, so that good acoustic characteristics can be obtained.
[0067]
[1−4.
State of Use in Speaker Device] In this speaker device 1, since the lower part of the transparent
housing 2 is open in the state where it is not installed for the installation object, the transparent
housing 2 realizes the function of the cabinet as it is Can not do it.
[0068]
However, in the speaker device 1, since the sealed space of the transparent housing 2 can be
generated using the installation surface of the installation object, the transparent housing 2 has a
simple structure that does not require the bottom surface. The body 2 can realize the function as
a cabinet.
[0069]
At this time, the speaker device 1 has a structure in which the transparent case 2 is transparent
and the lower side is open, so as shown in FIG. 10, the transparent case 2 and the installation
surface Z1S of the installation object Z1 The object OJ1 desired by the user can be easily
displayed in the enclosed space to be formed, and the object OJ1 can be easily taken in and out.
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15
[0070]
By the way, as shown in FIG. 11, when the speaker device 1 outputs sound in the low frequency
range only from the speaker unit 4 without using the transparent housing 2 as a cylindrical
diaphragm, a main body in which the speaker unit 4 is accommodated. The sound image OZ1 is
localized to the part 3.
[0071]
However, as shown in FIG. 12, when the speaker device 1 functions as a tweeter in a high range
by using the transparent housing 2 as a cylindrical diaphragm, and causes the speaker unit 4 to
function as a woofer in a low range, a tweeter is added Therefore, the sound image OZ2 can be
localized on the transparent housing 2 at the same time as the reproduction frequency band as
the speaker is expanded.
[0072]
Then, in the speaker device 1, for example, when a doll or the like is displayed as the object OJ1,
when the voice of the high-pitched doll is output from the transparent housing 2, a natural
impression is heard as if coming from near the mouth of the doll. It can be given to the user.
[0073]
Incidentally, in the speaker device 1, the low frequency component SAL supplied to the speaker
unit 4 can be provided with a delay time of several milliseconds by a delay circuit (not shown).
As a result, in the speaker device 1, the point in time when the low sound area is output from the
speaker unit 4 is later than the time in which high sound area sound is output from the
transparent housing 2, so that the human being The auditory feature makes it easy for the user
to feel the sound image OZ2 at the portion of the transparent housing 2 where the high-pitched
sound is output.
[0074]
Note that the speaker device 1 outputs a guidance voice of the display content for the object OJ 1
exhibited in the sealed space of the transparent housing 2 by using the transparent housing 2 as
a cylindrical diaphragm, or the BGM of the display (Background) It is also possible to realize a
usage form of outputting as Music).
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[0075]
[1−5.
Lighting Effect in Speaker Device] In this speaker device 1, the light from the total of six LED
bulbs 6 attached in such a manner as to surround the periphery of the protruding portion 3 D of
the main body 3 is diffused by the diffusion plate 7 The light passes through the inside of the
transparent housing 2 as light.
[0076]
At this time, as shown in FIG. 13, after the diffused light diffused by the diffusion plate 7 is
reflected by the inner side surface of the transparent housing 2, the speaker device 1 reaches the
installation surface Z1S of the installation object Z1 and the installation The plane Z1S is
irradiated.
[0077]
Here, as described above, since the transparent casing 2 is formed of a light transmitting or light
conducting acrylic resin, the diffused light diffused by the diffusion plate 7 is reflected by the
inner side surface of the transparent casing 2 After the setting, the setting surface Z1S of the
installation object Z1 is efficiently reached.
[0078]
At this time, since the rubber-based buffer material 12 is attached on the peripheral end of the
open lower end portion of the transparent housing 2, the diffused light reaching the installation
surface Z 1 S leaks from the open end of the transparent housing 2. Can be prevented.
[0079]
As a result, as shown in FIG. 14, the speaker device 1 can form an illumination state as if the
installation surface Z1S was lifted.
[0080]
In fact, in the speaker device 1, as a result of the installation surface Z1S on the inner side of the
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17
transparent housing 2 being irradiated, a visual effect is produced as if the installation surface
Z1S is a stage for the object OJ1 to be exhibited. The display of the exhibition can be further
enhanced.
[0081]
[1−6.
Operation and Effects] In the above-described configuration, the speaker device 1 does not have
the transparent casing 2 and the installation object for the first time when the tubular
transparent casing 2 whose one end is opened is installed with respect to the installation object
Z1. A sealed space is formed by the installation surface Z1S of Z1, and the transparent housing 2
functions as a cabinet for the speaker unit 4.
[0082]
For this reason, the speaker device 1 has a simple configuration in which the bottom surface of
the transparent housing 2 is not provided, but if it is installed on the installation object Z1, it
always forms an enclosed space and functions as a cabinet for the speaker unit 4 As a result, the
object OJ1 can be easily exhibited inside the transparent housing 2 without impairing the
function as a speaker.
[0083]
Further, the speaker device 1 has a simple structure that does not require a bottom surface
because it has a structure that functions as a cabinet for the first time when the tubular
transparent housing 2 having one open end is installed for the installation object Z1. Even if it is
a floor, a wall, a ceiling, or an installation surface, it can be installed anywhere.
[0084]
Furthermore, the speaker device 1 securely maintains the sealed space by the transparent
housing 2 by firmly pressing the transparent housing 2 installed on the installation object Z1
from the top by the relatively heavy main body portion 3 made of brass. Meanwhile, the shock
absorbing material 12 attached to the open end of the transparent housing 2 can prevent
transmission of the vibration of the transparent housing 2 to the installation surface Z1S, and can
obtain good acoustic characteristics.
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[0085]
Furthermore, the speaker device 1 irradiates the installation surface Z1S of the installation object
Z1 with the diffused light obtained through the LED bulb 6 and the diffusion plate 7 provided in
the lower body 3B of the main body 3, thereby the installation surface Z1S. You can make it
appear as if it were on stage and bring up the display more.
[0086]
At this time, since the speaker device 1 can localize the sound image to the transparent housing 2
side functioning as a tweeter, as a result, the sound image is localized near the display object, and
the display object and the output sound It can create a sense of unity.
[0087]
Moreover, since the speaker device 1 does not have a structure in which the speaker unit 4 can
be seen from the outside, it gives the user an impression as if it is a show window decorating a
display to the last, and can maintain excellent design as an interior. it can.
[0088]
According to the above configuration, the speaker device 1 functions as a cabinet only when the
transparent housing 2 whose one end side is opened is installed, so the display object is
transparent while realizing the function as the speaker. It can be placed inside the housing 2.
[0089]
Further, the speaker device 1 functions as a cabinet for the speaker unit 4 for the first time when
the transparent housing 2 is installed with respect to the installation object Z1, and the
transparent housing 2 itself functions as a tweeter. It is possible to realize a speaker with a wide
reproduction frequency band while having a simple and rich configuration.
[0090]
<2.
Other Embodiments> In the above-described embodiment, the speaker unit 4 housed in the main
body 3 is attached with the front facing upward, but the present invention is not limited thereto.
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However, the speaker unit 4 may be attached with the front surface facing downward.
[0091]
Further, in the above embodiment, the case of using the transparent case 2 is described, but the
present invention is not limited to this, and the case is not necessarily transparent, and a case of
a predetermined color is used You may
[0092]
Furthermore, in the above-described embodiment, the case has been described in which the
object OJ1 is placed and exhibited in the sealed space formed between the transparent housing 2
and the installation surface Z1S.
However, the present invention is not limited thereto, and the internal volume of the sealed space
by the transparent housing 2 is reduced when the object OJ 1 is displayed, in order to prevent
the low-pass resonant frequency f0 from the speaker unit 4 from rising. It is also possible to use
the transparent housing 2 having an inner volume which has been increased in advance by the
volume integral of the object OJ1.
[0093]
Alternatively, a knob (not shown) is provided on the surface of the main body 3 of the speaker
device 1, and the low-band resonance frequency f0 lowered by displaying the object OJ1 in the
sealed space by the transparent housing 2 is the knob May be adjusted through the signal
processing unit 127 (FIG. 8) by causing the user to operate to obtain acoustic characteristics
desired by the user.
[0094]
In this case, the speaker device 1 may adjust the level, the frequency characteristic, and the like
of the low frequency component SAL of the signal processing unit 127 in accordance with the
user's operation on the knob.
[0095]
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20
Furthermore, in the above-described embodiment, the case has been described in which the
substantially wedge-shaped transparent housing 2 which is spread as it goes to the hem is used.
However, the present invention is not limited to this, and as long as the lower end portion is
opened, the transparent casing 2 may be used which has other various shapes such as a simple
cylindrical shape and a triangular pyramid shape.
[0096]
Furthermore, in the above-mentioned embodiment, the case where the speaker apparatus of the
present invention is configured by the cabinet 2 as a housing and the speaker unit 4 as a sound
generator has been described.
However, the present invention is not limited to this, and the speaker device may be configured
by a casing and a sound generator having other various configurations and shapes.
[0097]
The speaker device according to the present invention can be applied to a speaker device
incorporated in an audio visual apparatus such as a television, besides being used as a single
speaker device, for example.
[0098]
DESCRIPTION OF SYMBOLS 1 ...... Speaker apparatus, 2 ...... Transparent housing | casing 3, 3 本
体 body part, 4 ス ピ ー カ Speaker unit, 5 5 Piezoelectric actuator, 6 6 LED bulb, 7 拡 散
Diffusion plate, 121 加 算 Adder, 122 ...... High pass filter, 123: low pass filter, 124, 127: signal
processing unit, 125, 128: amplifier.
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21
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