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DESCRIPTION JP2002210092

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DESCRIPTION JP2002210092
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
gaming machine, and more particularly to a gaming machine for expanding a reproduction
frequency band of a sound to be reproduced, in particular, a bass range.
[0002]
2. Description of the Related Art Conventionally, a game machine represented by a pachinko
machine, a pachislot machine or the like reproduces a sound effect or a notice sound during play
by means of a speaker installed inside. However, in the conventional game machine, since the
speakers are directly installed on the back side of the front portion (for example, pachinko
machine in pachinko machines) on which the electronic components and the like are installed,
the installation location of the speakers is limited. Therefore, in the conventional game machine,
the diameter of the speaker installed inside can not be increased, and there is a problem that the
reproduction range of the bass region is insufficient.
[0003]
In order to solve such a problem, a speaker box is attached to the opening of a pachinko machine
via a duct, and the sound reproduced from the speaker box is emitted from the opening via the
duct in Japanese Patent Application Laid-Open No. 8-19638. A configuration is proposed.
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According to this configuration, the aperture of the speaker unit can be increased to a certain
extent.
[0004]
However, in the above-described gaming machine, a speaker box (that is, a configuration in
which a speaker unit is enclosed by an enclosure) is provided inside the gaming machine to
improve the low range. Limits the size of the enclosure. Therefore, the stiffness of the internal air
increases with respect to the vibration of the diaphragm, and the low band resonant frequency
increases, so it is difficult to sufficiently expand the reproduction frequency band, particularly the
low frequency band. Furthermore, since the diameter of the speaker unit can not be made larger
than that of the enclosure, and a sufficiently large one can not be adopted, it is difficult to
sufficiently expand the bass range.
[0005]
The present invention has been made to solve the above-mentioned conventional problems, and
the object of the present invention is to make the enclosure of a speaker unit installed inside the
device sufficiently large, and to make the reproduction frequency band of reproduced sound
particularly An object of the present invention is to provide a gaming machine capable of
sufficiently expanding the low range.
[0006]
A game machine according to the present invention is characterized in that a front portion
having an opening for emitting reproduced sound, a case to which the front portion is attached,
the case and the front portion as an enclosure. A speaker unit to be used, and a sound guiding
portion which is defined between the opening and the speaker unit and guides reproduced sound
from the speaker unit to the opening.
[0007]
In a preferred embodiment, the sound conductor further includes an acoustic load.
[0008]
According to another aspect of the present invention, a speaker system for gaming machine is
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provided.
The gaming machine speaker system includes a speaker unit using as a enclosure a front face
having a defined opening for emitting reproduced sound and a housing to which the front face is
attached, and a speaker unit defined between the opening and the speaker unit And a sound
conducting unit for guiding the reproduced sound from the speaker unit to the opening.
[0009]
In a preferred embodiment, the sound conductor further includes an acoustic load.
[0010]
Hereinafter, the operation of the present invention will be described.
In the gaming machine and the gaming machine speaker system according to the present
invention, the speaker unit is attached to the opening defined in the front face via the cylinder
defining the sound conducting part.
Therefore, a speaker unit with a sufficiently large aperture can be adopted, and the low
frequency resonance frequency can be lowered to expand the reproduction frequency band,
particularly the low frequency band.
In addition, the enclosure of the speaker unit is not newly provided in the gaming machine, and
the housing and the front part of the gaming machine are used as the enclosure of the speaker
unit, so that the cost can be reduced. Furthermore, since the casing and the front part of the
gaming machine are sufficiently large as an enclosure for a speaker, the stiffness of air in the
casing is small, the low resonance frequency is small, and the bass range can be expanded.
[0011]
Preferably, the sound guiding portion has an acoustic loading portion, so that the mass of the
vibration system including the load mass of air increases, the air passing through the sound
guiding portion is compressed, and the reproduced sound emitted is low. The band resonance
frequency is further reduced, and the reproduction frequency band, particularly the bass range,
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can be greatly expanded.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present
invention will be specifically described below with reference to FIGS. 1 to 8, but the present
invention is not limited to these embodiments.
In the present embodiment, a pachinko machine is described as an example of a game machine,
but the present invention is not limited to a pachinko machine.
[0013]
FIG. 1 is a schematic cross-sectional view showing a gaming machine according to a preferred
embodiment of the present invention. The gaming machine 1 according to the present invention
comprises a housing 2, a front face 3, a speaker unit 4, and a sound conducting part 5.
[0014]
The housing 2 is a housing for the gaming machine 1 and also has a role as an enclosure for the
speaker unit 4 together with a front face portion 3 described later. That is, since the sound
reproduced from the back side of the speaker unit 4 described later is sealed by the case 2 and is
not emitted to the outside of the gaming machine 1, the sound (particularly bass) reproduced
from the front of the speaker unit 4 is canceled Does not attenuate the Furthermore, since the
housing 2 is sufficiently large as an enclosure for the speaker unit 4, the stiffness of the air in the
housing 2 is reduced, the low resonance frequency is lowered, and the reproduction band,
particularly the low frequency band can be expanded. .
[0015]
The front part 3 is provided on the front of the gaming machine 1. The front part 3 is attached to
the housing 2 and is a part of the gaming machine 1 for displaying the play state to the player.
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For example, in the present embodiment in which the gaming machine 1 is a pachinko machine,
the front part 3 is a pachinko machine, and the front side of the pachinko machine 3 is provided
with nails and winning openings etc. (both not shown). It is a game board, and electronic parts
3A are attached to the back side. The pachinko machine 3 defines an opening 6 through which
the sound reproduced from the speaker unit 4 is emitted. Although the number and place where
the opening 6 is defined are not limited, for example, as shown in FIG. 1A, the opening 6 is
provided on the upper part of the pachinko machine 3.
[0016]
The speaker unit 4 is attached to one end of a cylindrical body 5A that defines a sound
conducting portion 5 described later, and the other end of the cylindrical body 5A is attached to
the opening 6. That is, the speaker unit 4 is disposed inside the housing 2 and is supported by
the cylindrical body 5A that defines the sound conducting portion 5. The enclosure of the
speaker unit 4 doubles as the housing 2 and the front part 3 as described above. Therefore, the
size of the enclosure becomes extremely large as compared with the case of newly installing an
enclosure for a speaker unit in the casing of the gaming machine, and the bass range can be
expanded. Since the inside of the housing 2 has a very sufficient volume for disposing the
speaker unit 4, the speaker unit 4 can be disposed at an arbitrary position inside the housing 2,
and the cylinder 5A can be arbitrarily selected. It can be shaped. The speaker unit 4 is not
directly attached to the opening 6 having a small installation area, but is disposed inside the
housing 2, so that a speaker unit with a large diameter can be adopted. The number of speaker
units 4 is arbitrary, and may be one or more depending on the purpose or application.
[0017]
The sound guiding portion 5 is defined between the front surface of the speaker unit 4 and the
opening 6 by the cylindrical body 5A. The cylindrical body 5 </ b> A is attached between the
speaker unit 4 and the opening 6 and supports the speaker unit 4 inside the housing 2. The
sound guiding unit 5 emits the sound (sound effect or notification sound) reproduced from the
speaker unit 4 to the outside of the gaming machine 1 through the opening 6. The length of the
sound conducting portion 5 (that is, the cylindrical body 5A) is arbitrary as long as the speaker
unit 4 can be attached (that is, the electronic parts 3A and the like do not get in the way). ~ 25
cm. This is because the bass range can be expanded extremely well. The cylindrical body 5A (the
sound conducting portion 5) is a duct in the present embodiment, but is not limited to the duct
and, for example, a horn may be adopted. The shape of the duct 5A is not particularly limited, but
for example, in order to adopt a speaker unit having a larger aperture than the opening 6, as
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shown in FIG. 1A, the area on the opening 6 side (FIG. 1A) The area of the speaker unit 4 is
formed to be larger than the width shown). With such a configuration of the duct 5A, the speaker
unit 4 with a large diameter can be adopted, and the sound (sound effect or notification sound)
reproduced from the speaker unit 4 is emitted to the outside through the sound conductor 5.
Since the air is compressed and expanded at the same time, the bass range of the reproduced
sound can be further expanded. Of course, as shown in FIG. 1 (b), when the areas of the opening
6 and the speaker unit 4 are equal, a cylindrical duct having a constant cross-sectional area may
be used.
[0018]
Preferably, the sound guiding unit 5 has an acoustic loading unit 8 as shown in FIG. The acoustic
load unit 8 is a portion that enlarges the internal load mass, widens the bass range, reduces the
compliance, and reduces the peak dip at the high resonance frequency. That is, since the mass of
the vibration system including the mass of air is further increased by the acoustic load unit 8 and
the air passing through the sound guiding unit 5 is further compressed and expanded, the bass
range can be further expanded. FIG. 2A is a schematic cross-sectional view showing the gaming
machine 1 in which the sound loading unit 8 is defined in the sound guiding unit 5. FIG.2 (b) is
an enlarged view of the principal part of FIG. 2 (a). The acoustic load portion 8 is a portion
defined such that a predetermined portion in the sound guiding portion 5 has a larger crosssectional area than the other portions. For example, as shown in FIG. 2, the acoustic load unit 8 is
a portion which is defined in the sound guiding unit 5 and has a triangular cross section
surrounded by a solid line and a broken line. That is, the acoustic load unit 8 is defined so that
the cross-sectional area continuously decreases from the speaker unit 4 to the distance a at the
inclination angle c shown in FIG. Therefore, when the reproduced sound is propagated from the
acoustic load unit 8 to the portion other than the acoustic load unit 8 in the sound guiding unit 5,
the air in the acoustic load unit 8 becomes a load mass and the mass of the vibration system
further increases. As the compression of the sound is further increased, the reproduced sound
emitted from the gaming machine 1 to the outside further expands the reproduction band,
particularly the low sound area. Furthermore, by including the acoustic load unit 8 having such a
shape, the compliance in the acoustic load unit 8 can be reduced, and the peak dip at the highresonance frequency can be reduced. Preferably, the length a defining the acoustic loading
portion 8 is 10-40% of the length b of the duct. This is because the bass range can be expanded
extremely well, and the peak dip at the high resonance frequency can be reduced. Preferably, the
area of the opening 6 is 10 to 40% of the area of the speaker unit 4. This is because the bass
range can be expanded extremely well.
[0019]
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Next, another embodiment of the acoustic load unit 8 will be described with reference to FIGS.
FIG. 3 is a cross-sectional view for explaining another embodiment of the acoustic load unit 8. In
the sound conducting portion 5, an acoustic load portion 8 having a rectangular cross section
surrounded by a solid line and a broken line and having a length a smaller than the width d of
the duct 5A (opening 6) is defined. Preferably, the length a of the acoustic load portion 8 is 50 to
100% with respect to the duct width d. This is because the load mass of the air of the acoustic
load unit 8 can be increased to expand the bass range, and the compliance of the acoustic load
unit 8 can be reduced to reduce the peak dip at the high resonance frequency.
[0020]
FIG. 4 is a cross-sectional view for explaining yet another embodiment of the acoustic load unit 8.
The sound guiding portion 5 has a triangular shape whose cross section is surrounded by a solid
line and a broken line, and acoustic load portions 8 whose cross-sectional area continuously
decreases from the speaker unit 4 to a predetermined distance are defined on both upper and
lower sides. Even in such a configuration, since the air in the acoustic load unit 8 acts as a load
mass, the low frequency resonance frequency is lowered, and the bass range can be expanded
extremely well.
[0021]
FIG. 5A is a cross-sectional view for explaining yet another embodiment of the acoustic load unit
8. FIG. 5 (b) is a plan view taken along the line e-e in FIG. 5 (a). As shown to Fig.5 (a), the speaker
unit 4 larger than the cross-sectional area of the sound conduction part 5 is attached
perpendicularly | vertically with respect to the duct 5A. Then, as shown in FIG. 5B, the acoustic
loading unit 8 is defined, which has a triangular shape whose plane is surrounded by a solid line
and a broken line, and the cross-sectional area decreases continuously to a predetermined
distance from the speaker unit 4. There is. Even in such a configuration, since the air in the
acoustic load unit 8 acts as a load mass, the low frequency resonance frequency is lowered, and
the bass range can be expanded extremely well.
[0022]
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FIG. 6 is a cross-sectional view for explaining yet another embodiment of the acoustic load unit 8.
A convex body 5B is provided at the bottom of the duct 5A in order to define the acoustic load
portion 8 in the sound guiding portion 5 having a constant cross-sectional area. Even in such a
configuration, since the air in the acoustic load unit 8 acts as a load mass, the low frequency
resonance frequency is lowered, and the bass range can be expanded extremely well. The shape
of the convex body may be any suitable shape depending on the shape of the acoustic load unit 8
to be defined.
[0023]
As mentioned above, although it demonstrated using the pachinko machine as a preferable
embodiment of this invention, this invention is not limited to these embodiment, It may be
employ | adopted as any game machine provided with a speaker for reproducing an audio | voice
. For example, the present invention can be suitably used for pachislot machines, pinball
machines, arcade game machines (that is, game machines used in game centers etc.) and the like.
[0024]
Hereinafter, preferred embodiments of the present invention will be described, but the present
invention is not limited to these embodiments.
[0025]
(Example 1) The frequency-sound pressure characteristics of the gaming machine 1 in which the
speaker unit 4 having an aperture of 8 cm was attached to the opening 6 via the duct 5 having a
length of about 10 cm were measured by the usual method.
The measurement results are shown by curve A in FIG.
[0026]
(Example 2) A speaker unit 4 having an aperture of 8 cm is provided in an opening 6 via a duct 5
having an acoustic load 8 (having a length of about 3 cm) shown in FIG. 2 and having a length b
of about 10 cm. The frequency-sound pressure characteristics of the installed gaming machine 1
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were measured in the same manner as in Example 1. The measurement results are shown by
curve B in FIG.
[0027]
Comparative Example 1 A frequency-sound pressure characteristic was measured in the same
manner as in Example 1 for a gaming machine in which a speaker unit having an aperture of 8
cm was directly attached to the opening. The measurement results are shown by curve C in FIG.
[0028]
Example 1 in which the speaker unit 4 is attached to the opening 6 via the duct 5 as compared
with Comparative Example 1 (low frequency resonance frequency: about 150 Hz) in which the
speaker unit is directly attached to the opening as shown in FIG. The low band resonant
frequency is lowered in the case of the band resonant frequency: about 130 Hz, and the
reproduction range of the low band is expanded. In the second embodiment (low frequency
resonance frequency: about 115 Hz) in which the acoustic load portion 8 is formed in the duct 5,
the low frequency resonance frequency is further lowered, and the reproduction range of the low
frequency band is further expanded.
[0029]
Comparative Example 2 The frequency-sound pressure characteristics of the gaming machine in
which a speaker box having a speaker unit having an aperture of 8 cm was attached to the
opening through a duct having a length of 10 cm was measured in the usual manner. The
measurement results are shown in curve B of FIG. However, curve A of FIG. 8 shows the result of
measuring Example 1.
[0030]
Example 1 (curve A) (low) in which only the speaker unit 4 is attached via the duct 5 as shown in
FIG. The low band resonant frequency is lowered in the case of the band resonant frequency:
about 130 Hz, and the reproduction range of the low band is expanded.
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[0031]
In the gaming machine according to the present invention, the housing and the front part are
used as an enclosure for the speaker unit, and the speaker unit is attached to the opening defined
in the front part through the cylinder defining the sound conducting part. ing.
Therefore, the aperture of the speaker unit and the enclosure can be sufficiently large, and the
reproduction frequency band, particularly the bass range, can be expanded.
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