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DESCRIPTION JP2008131540

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DESCRIPTION JP2008131540
The present invention provides a small and thin speaker device that emits sound with a firm
sense of localization of a sound image without reducing the sound quality in the low frequency
range. SOLUTION: A tweeter 3, a woofer 2, and an opening 25 of a sound guide tube 20 are
disposed in order along the length L direction on a front wall 11 of a casing 1 of a speaker
device. The sound guiding tube 20 propagates the sound of the low sound range amplified by the
resonance of the diaphragm 10 with the sound wave from the woofer 2 and emits the sound
from the opening 25. The opening 25 has a wide shape which is short in the length L direction
and long in the width W direction. Because the opening 25 for emitting low-range sound is close
to the woofer 2 and the opening 25 for emitting low-range sound is separated from the tweeter 3
for emitting high-range sound, The sound can be emitted to the listener with a firm sense of
localization of the sound image. [Selected figure] Figure 1
Speaker device
[0001]
The present invention relates to a speaker device that converts an electrical signal into sound and
emits the sound, and more particularly to a thin speaker device for embedding in a wall or the
like whose thickness in the depth direction is thin.
[0002]
2. Description of the Related Art Conventionally, there are speaker devices of various structures
as a speaker device that converts an electrical signal into sound and emits the sound.
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In such a speaker device, the reproducible frequency band is determined by the shape and
characteristics of the speaker unit. Generally, the smaller the aperture, the better the high
frequency reproduction, and the larger the aperture, the good low frequency reproduction.
Therefore, when the shape of the speaker device is miniaturized, the aperture of the speaker unit
necessarily becomes smaller, and the low-frequency reproduction characteristic tends to be poor.
Various low-frequency auxiliary regeneration means are disclosed as a method of solving this.
For example, generally, a bass port, a drone cone, and a back load horn are added to the housing
of the speaker device. Specifically, Patent Document 1 adds a back load horn, and amplifies the
sound generated on the back surface side of the speaker unit with the back load horn and emits
the sound. JP 2000-92583 A
[0003]
By the way, as a use application of a speaker apparatus, it arrange | positions in comparatively
small space like a karaoke box, and it may be emitted to a specific person, ie, a singer and a
listener. When the speaker device is disposed in such a small space, the size of the speaker
device should be small. For this reason, in the case of a speaker device provided with both the
high range tweeter and the bottom midrange woofer, an opening such as a back load horn is
disposed in the vicinity of the tweeter from the viewpoint of downsizing.
[0004]
However, in such an arrangement, the sound from the tweeter and the sound from the bass
reproduction unit such as the back load horn are emitted near the extreme, so it is firm for the
singer and listener on the listening side. You can get a sound image and a sense of localization.
[0005]
Therefore, an object of the present invention is to provide a speaker device that is compact, can
reproduce powerful deep bass, and has a good balance of sound.
[0006]
The present invention is a substantially rectangular parallelepiped housing having a first wall and
a second wall facing each other, in which the speaker unit is disposed on the first wall, the first
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wall and the second wall of the housing The present invention relates to a speaker device having
a thickness, which is an installation interval of, smaller than the length and width of the first wall
and the second wall.
The speaker device is disposed along the second wall between the second wall and the speaker
unit, and has a fixed end fixed to the housing, and the first wall and the second wall are fixed by
sound emitted from the speaker unit. The vibration member resonates and resonates with a
direction connecting the two walls as a main vibration direction, and a sound guiding tube having
an opening formed in the first wall and guiding a sound wave generated by the vibration member
to the opening.
And in this speaker device, a plurality of speaker units are arranged in order of the sound area of
the sound to be reproduced along the length direction on the first wall. Furthermore, the opening
of the sound guide tube has a wide shape having a width that substantially matches the width of
the first wall, and faces the speaker unit that reproduces only the sound range higher than the
low sound range, sandwiching the speaker unit reproducing the low sound range It is
characterized by being installed on the
[0007]
In this configuration, the speaker units are arranged in the order of the sound range to be
reproduced, with the length direction as the arrangement direction, on the first wall which is the
sound emitting surface of the thin housing. For example, in the configuration with the smallest
number of speaker units, a tweeter, which is a speaker unit that reproduces a high range, and a
woofer, which is a speaker unit that reproduces a middle range and a low range, are disposed
along the length direction. Ru. The opening of the sound guiding tube is disposed in the vicinity
of a speaker unit that reproduces a low tone range, on the side facing the speaker unit that
reproduces a high tone range than the speaker unit. In the example described above, the opening
of the sound guiding tube is disposed on the side facing the tweeter in the vicinity of the woofer.
That is, the tweeter, the woofer, and the opening of the sound guide tube are disposed in this
order along the length direction of the first wall. With this configuration, the amplified bass is
emitted from the vicinity of the pole of the speaker unit that reproduces the bass range. At this
time, the opening of the sound guide tube is wide in the direction perpendicular to the
arrangement direction and short in length along the arrangement direction, so even if the
opening of the sound guide tube is formed, the area of the first wall is Not too big.
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[0008]
Moreover, the speaker apparatus of this invention comprises a speaker unit by the several single
speaker unit in which the range which reproduces | regenerates each differs except the end of
the said range. The pattern of the arrangement of the speaker units of this speaker device is a
single speaker unit reproducing the mid-range and the low-range so that the reproduction range
becomes lower toward the both ends of the arrangement centering on the single speaker unit
reproducing the high range Are arranged. Furthermore, the sound guide tube of this speaker
device is characterized in that it is disposed at both ends of a single speaker unit that reproduces
a low tone range.
[0009]
In this configuration, the speaker units are arranged in the order of the sound range to be
reproduced, with the length direction as the arrangement direction, on the first wall which is the
sound emitting surface of the thin housing. At this time, a speaker unit for reproducing the
highest frequency band is disposed at the center of the arrangement direction, and a speaker unit
for gradually reproducing the low frequency band from the speaker unit for sequentially
reproducing the high frequency band is disposed toward both ends of the arrangement direction.
A speaker unit for reproducing the lowest frequency band is disposed at both ends of the
arrangement direction. Then, in the vicinity of the speaker units at both ends in the arrangement
direction, the opening of the sound guide tube is disposed on the end side along the arrangement
direction. The sound guide tube is formed so that the dimension (width) in the direction
perpendicular to the arrangement direction is longer than the dimension (length) in the
arrangement direction. At the back of the sound guiding tube is formed a vibrating member for
amplifying the sound in the low tone range, and the sound whose low tone range is amplified by
the vibrating member is propagated in the sound guiding tube and emitted from the opening to
the outside Be done. With such a configuration, the amplified bass is emitted from the vicinity of
the speaker unit that reproduces the bass range. At this time, the opening of the sound guide
tube is wide in the direction perpendicular to the arrangement direction and short in length
along the arrangement direction, so even if the opening of the sound guide tube is formed, the
area of the first wall is Not too big.
[0010]
Further, the speaker device according to the present invention is a full range in which the
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speaker unit is reproduced by a plurality of single speaker units having different ranges for
reproducing each of the speaker units except for the end of the range and a plurality of single
speaker units having different ranges for reproduction. And a full-range speaker unit for
reproducing The pattern of the arrangement of the speaker units of this speaker device is a
single speaker unit reproducing the mid-range and the low-range so that the reproduction range
becomes lower toward the both ends of the arrangement centering on the single speaker unit
reproducing the high range Are arranged, and full-range speaker units are disposed at both ends
of a single speaker unit that reproduces a low-pitch range. Furthermore, the sound guide tube of
this speaker device is characterized in that it is disposed on both ends of the full-range speaker
unit.
[0011]
In this configuration, the speaker units are arranged in the order of the sound range to be
reproduced, with the length direction as the arrangement direction, on the first wall which is the
sound emitting surface of the thin housing. At this time, a speaker unit for reproducing the
highest frequency band is disposed at the center of the arrangement direction, and a speaker unit
for gradually reproducing the low frequency band from the speaker unit for sequentially
reproducing the high frequency band is disposed toward both ends of the arrangement direction.
A speaker unit for reproducing the lowest frequency band is disposed at both ends of the
arrangement direction. Furthermore, a full-range speaker unit that reproduces the full range is
disposed on the end side along the arrangement direction of the speaker units that reproduce the
lowest range most. Then, in the vicinity of the full range speaker units at both ends in the
arrangement direction, the opening of the sound guide tube is disposed on the end side along the
arrangement direction. The sound guide tube is formed so that the dimension (width) in the
direction perpendicular to the arrangement direction is longer than the dimension (length) in the
arrangement direction. At the back of the sound guiding tube is formed a vibrating member for
amplifying the sound in the low tone range, and the sound whose low tone range is amplified by
the vibrating member is propagated in the sound guiding tube and emitted from the opening to
the outside Be done. According to such a configuration, the sound in which only the bass range is
amplified is emitted from the vicinity of the full range speaker unit that reproduces the full range
including the low range. At this time, the opening of the sound guide tube is wide in the direction
perpendicular to the arrangement direction and short in length along the arrangement direction,
so even if the opening of the sound guide tube is formed, the area of the first wall is Not too big.
[0012]
According to the present invention, it is possible to realize a speaker device that reproduces more
powerful bass sound with a simple structure without breaking the balance of emitted sound
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while being small and thin.
[0013]
A speaker device according to a first embodiment of the present invention will be described with
reference to the drawings.
FIG. 1A is a front view, FIG. 1B is a side sectional view, and FIG. 1C is a back view with the back
wall 4 removed. As shown in FIG. 1, the speaker device of the present embodiment includes a
housing 1, a woofer 2 that is a speaker unit that mainly reproduces a low range and a middle
range, and a tweeter 3 that is a speaker unit that mainly reproduces high range.
[0014]
The housing 1 has a substantially rectangular parallelepiped shape including a front wall 11, a
back wall 4, a top wall 12, a bottom wall 13, and two side walls 15. The length L and the width W
corresponding to the longitudinal direction and the lateral direction of the front wall 11 of the
housing 1 are greater than the thickness D (D << W, L) corresponding to the distance between
the front wall 11 and the back wall 4 It is formed in a sufficiently long shape. In the speaker
device shown in FIG. 1, the length L is formed to be longer than the width W (W <H). In addition,
the back wall 4 is detachably installed in the housing 1.
[0015]
In the front wall 11 of the housing 1, the tweeter 3, the woofer 2, and the opening 25 of the
horizontal pipe portion 21 of the sound guiding tube 20 are disposed in order from the top wall
12 side along the length L direction. The tweeter 3 and the woofer 2 are installed so that the
center of each unit is disposed at the center in the width W direction of the front wall 11. At this
time, the tweeter 3 is disposed in a closed space independent of the woofer 2 and the diaphragm
10 described later. Although not shown, signal lines for inputting electric signals for vibrating the
tweeter 3 and the woofer 2 are connected to the tweeter 3 and the woofer 2, and sound emission
signals are input from an external audio reproducing device, a karaoke device, etc. Be done. The
opening of the horizontal pipe portion 21 of the sound guiding tube 20 has a width substantially
equal to the width W of the front wall 11, the length in the length L direction is shorter than the
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width, and the woofer 2 and the front wall 11 It is set as long as mechanically possible as far as
the bottom end of the frame. The horizontal pipe portion 21 has a front cross section having the
same shape as the opening 25 by the bottom wall 13 of the housing 1, the side wall 15 and the
horizontal intermediate wall 14A, and extends from the front wall 11 to the back wall 4 It is
formed in the shape extended linearly along thickness D direction.
[0016]
The horizontal intermediate wall 14A is formed in a flat plate shape extending in parallel to the
bottom wall 13, and is connected to the front wall 11 and has a shape extending from the back
wall 4 to a position on the front wall 11 side by a predetermined distance. The position in the
height direction of the horizontal intermediate wall 14A is set to a position substantially in
contact with the lowermost end of the installation position of the woofer 2.
[0017]
A vertical intermediate wall 14B is installed at the end on the back wall 4 side of the horizontal
intermediate wall 14A. The vertical intermediate wall 14B is formed in a flat plate shape
extending in parallel to the front wall 11 and the back wall 4, and is connected to the top wall 12
and the horizontal intermediate wall 14A. The position in the thickness direction of the vertical
intermediate wall 14B is set to a position separated from the deepest end of the woofer 2 by a
distance such that the diaphragm 10 does not contact the woofer 2 even when the diaphragm 10
described later resonates and vibrates. It is done.
[0018]
The vertical intermediate wall 14B is formed with a substantially U-shaped slit 5 along the top
wall 12 and the side wall 15 at a predetermined distance from the top wall 12 and at a
predetermined distance from each side wall 15. A portion surrounded by the slit 5 and having
one end integrated with the vertical intermediate wall 14 B and the other end separated from the
vertical intermediate wall 14 B is the diaphragm 10. The one end of the vertical intermediate wall
14B corresponds to the "fixed end" of the present invention.
[0019]
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As described above, the diaphragm 10 is formed of a flat plate-like member in which the
horizontal intermediate wall 14A side of the vertical intermediate wall 14B is a fixed end. Under
the present circumstances, the length of the height direction is formed long compared with the
length of the width direction, for example, width: height is set to about 1: 1.2-2.0. In addition, this
width-height ratio is an example which can acquire an effective effect, and may be other ratios
according to the specification of a speaker apparatus.
[0020]
The vertical tube portion 22 of the sound guide tube 20 is formed by the vertical intermediate
wall 14B including the diaphragm 10 thus formed, the top wall 12, the back wall 4 and the side
walls 15. The vertical pipe portion 22 has the same width as the horizontal pipe portion 21, and
the length (the distance in the length L direction in FIG. 1) is a length from the bottom wall 13 to
the top wall 12. Further, the length of the vertical pipe portion 22 (the distance in the direction
of thickness D in FIG. 1) is set by the distance between the vertical intermediate wall 14 B and
the back wall 4. The sound guiding tube 20 having a shape bent at a right angle at an
intermediate position is formed by the vertical tube portion 22 whose axis is in the vertical
direction and the horizontal tube portion 21 whose axis is in the horizontal direction. The sound
guiding tube does not necessarily have to be bent at a right angle, and may have a shape that
does not impede the flow of air or a shape that reduces air resistance. For example, even if a
diagonal direction pipe part whose axis intersects at an obtuse angle with both the vertical pipe
part 22 and the horizontal pipe part 21 is provided, the vertical wall 22 and the horizontal pipe
part 21 are connected in the diagonal direction pipe part. good.
[0021]
The edge 6 is formed of an elastic body, is installed across the slit 5 on the diaphragm 10 and the
vertical intermediate wall 14 B, and deforms following the vibration of the diaphragm 10.
[0022]
Thus, by covering the slit 5 with the edge 6, the space of the sound introducing tube 20 formed
in the housing 1 by the horizontal intermediate wall 14A, the vertical intermediate wall 14B
including the diaphragm 10, and the edge 6 is an opening Only 25 is a closed space open to the
outside.
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In addition, the slit 5 is hermetically sealed by the edge 6 so that the front wall 11, the woofer 2,
the top wall 12, each side wall 15, the horizontal intermediate wall 14 A, the vertical
intermediate wall 14 B including the diaphragm 10, and the edge 6 A space 30 is formed.
[0023]
Next, the process of emitting sound by the speaker apparatus having such a configuration will be
described with reference to FIG.
[0024]
FIG. 2 is a view for explaining the sound emission process of the speaker device of the present
embodiment.
A sound emission sound signal consisting of an electric signal is applied to the woofer 2 and the
tweeter 3 from an external audio reproducing device, a karaoke device or the like. At this time, an
emitted sound signal including a low range (fL) and a middle range (fM) is applied to the woofer
2, and an emitted sound signal having only a high range (fH) is applied to the tweeter 3 . The
woofer 2 and the tweeter 3 reproduce sound emission sound signals given thereto, and emit the
sound to the outside in the front direction of the speaker device (the housing 1). That is, the
cones of the woofer 2 and the tweeter 3 vibrate to vibrate the air on the outside side from the
cones and emit sound waves.
[0025]
As described above, when the woofer 2 reproduces the emitted sound signal, not only the sound
wave is transmitted to the outside of the housing 1, but also the pressure change according to
the sound wave in the sealed space 30 of the housing 1. It occurs.
[0026]
The diaphragm 10 has one end completely fixed to or integrally formed with the vertical
intermediate wall 14B, and is made of a material having a strength enough to support the weight
of the diaphragm 10 and a spring property capable of withstanding vibration.
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[0027]
The diaphragm 10 is deformed as if it were a leaf spring, when the pressure change occurs in the
sealed space 30, but the deformation at the fixed end is always "0", continuously as it gets away
from the fixed end. The end opposite to the fixed end is referred to as the vibrating end because
the deformation is greater.
[0028]
Although the edge 6 is an elastic body, its spring property is set to be much smaller than that of
the diaphragm 10 because only the airtightness is intended.
For this reason, when a pressure change corresponding to the sound wave in the enclosed space
30 occurs, resonance occurs due to the equivalent mass of the air spring and the cantilevered
diaphragm 10 determined by the volume of the enclosed space 30, thereby amplifying a band
around the resonant frequency. it can.
[0029]
In addition, the adjustment at the time of changing the equivalent mass of the diaphragm 10 is
implement | achieved by removing the back surface wall 4 installed in the housing | casing 1,
and equipping the diaphragm 10 with a required weight.
[0030]
The sound wave (Df L: D is a constant larger than 1) whose low range is amplified by the
diaphragm 10 vibrates the air of the vertical pipe portion 22 and propagates in the vertical pipe
portion 22, and the opening portion from the vertical pipe portion 22 It is propagated to the
horizontal pipe portion 21 near 25.
The sound wave propagated in the horizontal pipe portion 21 is propagated from the vertical
pipe portion 22 side toward the opening 25 side.
The sound wave reaching the opening 25 is emitted from the opening 25 in the front direction of
the housing 1.
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As a result, the sound in which the bass range is amplified is emitted from the opening 25. In this
way, the low-range sound (DfL) amplified from the opening 25 is emitted, so that the low-range
sound is amplified from the side facing the tweeter 3 in the vicinity of the pole of the woofer 2
that reproduces the low range. It is emitted. As a result, since a sound image is concentrated and
a stable sense of localization is obtained, the listener can listen to the sound emitted from the
speaker device 1 without a sense of discomfort. That is, it is possible to realize a speaker device
that reproduces powerful bass and does not give the listener a sense of discomfort.
[0031]
Furthermore, since the diaphragm is installed not on the front wall but on the back wall side, it is
not necessary to arrange on the front wall a diaphragm that requires a larger area than the
woofer. As a result, the shape of the speaker device in a front view becomes smaller. As a result,
it is possible to realize a small and thin speaker device that reproduces powerful bass without a
sense of discomfort. Also, by installing a diaphragm on the back wall side where the speaker unit
such as the tweeter 3 or the woofer 2 is disposed opposite to the front wall where the speaker
unit is disposed, a sound wave is generated to resonate the diaphragm A diaphragm requiring a
larger area than the speaker unit (in the above description, the woofer 2) can be disposed in a
housing having the same size as the speaker device formed only of the speaker unit.
[0032]
Further, at this time, since the vertical pipe portion 22 and the horizontal pipe portion 21 of the
sound guide tube 20 have the same width as the width of the housing 1, when propagating
through the sound guide tube 20, the diameter of the sound guide tube is The sound quality
problems caused by the small size, that is, the narrow sound conduction path, are prevented.
Therefore, a sound obtained by accurately amplifying the low range of the sound reproduced by
the woofer 2 is emitted from the opening 25.
[0033]
Further, by arranging the back wall so as to be removable from the housing, it is possible to
easily adjust the vibration characteristics of the diaphragm installed inside the housing.
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[0034]
Next, a speaker device according to a second embodiment will be described with reference to the
drawings.
3A and 3B are a front view and a top surface sectional view showing a schematic configuration of
the speaker device of the present embodiment, wherein FIG. 3A is a top surface sectional view
and FIG. 3B is a front view. In the description of the present embodiment, the longitudinal
direction (lateral direction shown in FIG. 3) of the front wall 111 of the housing 100 is the length
L0 direction, and the width direction of the front wall 111 of the housing 100 (FIG. The vertical
direction shown by) is described as the width W0 direction. As shown in FIG. 3, in the speaker
device of the present embodiment, the length D0 of the thickness direction (vertical direction in
FIG. 3A) is greater than the length W0 of the width direction (longitudinal direction in FIG. The
housing 100 has a shape which is significantly short and whose length L0 in the length direction
(the horizontal direction in FIGS. 3A and 3B) is much wider than the length W0 in the width
direction.
[0035]
The speaker device according to the present embodiment has a configuration in which a plurality
of speaker units are arranged on a straight line at predetermined intervals on the front wall 111
of the housing 100.
[0036]
The plurality of speaker units are a plurality of high-pitched speaker units 102 each playing
high-pitched sound, a plurality of mid-tone speaker units 103 each reproduced mid-pitched
sound, and a plurality of low-pitched sound bass units And a speaker unit 104.
[0037]
The plurality of speaker units are disposed on a linear array axis (dotted line in FIG. 3) along the
length L0 direction, and four high-pitched speaker units 102 are disposed at the center of the
array direction.
Two middle sound speaker units 103 are arranged on the array axis so as to sandwich the high
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sound speaker unit group 102.
Furthermore, the low-pitched speaker units 104 are arranged one by one on the arrangement
axis so as to sandwich the speaker unit group including the mid-sound speaker unit 103 and the
high-sound speaker unit 102.
[0038]
At both ends in the extending direction (length L0 direction) of the arrangement axis in the
housing 100, the sound guiding tubes 200 having openings 250 short in the length L0 direction
and long in the width W0 direction are respectively formed. . The sound guiding tube 200 has a
shape bent in the middle when viewed from the top and bottom sides, and extends in the
direction of thickness D 0 from the opening 250 (front wall 111 side) to the back wall 112 side.
And a portion connected to the portion and extending from both ends in the length L0 direction
of the housing 100 toward the center direction in the length L0 direction by a predetermined
length. Also in the present embodiment, the shape of the sound guiding tube 200 does not
necessarily have to be a shape bent at a right angle as shown in FIG. 3, and the shape that does
not impede the flow of air in the tube and the air resistance become low. Any shape is acceptable.
The sound guide tube 200 is formed such that the cross section perpendicular to the direction in
which the sound guide tube 200 extends has a longitudinally elongated shape similar to the
opening 250 at any portion in the sound guide tube 200. Such a sound guiding tube 200 is
formed by the first vertical intermediate wall 115, the second vertical intermediate wall 116, the
third vertical intermediate wall 117, the top wall, the bottom wall, the side wall 114, and the
back wall 112. . The first vertical intermediate wall 115 has a shape extending in the direction of
thickness D 0 disposed between the bass speaker 104 in the housing 100 and the mid-tone
speaker unit 105 adjacent thereto. The second vertical intermediate wall 116 is formed in the
vicinity of the bass speaker unit 104 of the housing 100 and on the side wall 114 side in the
length L 0 direction of the housing 100. The third vertical intermediate wall 117 is formed in the
vicinity of the bass speaker unit 104 and on the side of the back wall 112 in the thickness D 0
direction of the housing 100.
[0039]
The third vertical intermediate wall 117 has the same structure as the vertical intermediate wall
14B of the first embodiment, and includes the diaphragm 110 with the substantially U-shaped
slit 107. At this time, the slit 107 is formed such that the fixed end of the diaphragm 110 is on
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the side wall 114 side. And the edge 106 which consists of elastic bodies is installed so that the
slit 107 may be covered. Thus, a closed space 300 is formed behind the bass speaker 104 by the
third vertical intermediate wall 117 having the top wall, the bottom wall, the first vertical
intermediate wall 115, the second vertical intermediate wall 116, and the diaphragm 110. Ru. In
the rear region of the high-sound speaker unit 102 and the medium-sound speaker unit 103 in
the housing 1, a closed space 310 is formed by the top wall, the bottom wall, the front wall 111,
the back wall 112, and the first vertical intermediate wall 115. It is formed.
[0040]
In such a structure, when the bass speaker unit 104 emits sound, the air in the enclosed space
300 vibrates and the sound wave is transmitted to the diaphragm 100. The diaphragm 100 is
brought into resonance by this sound wave, and the amplified sound wave vibrates the air in the
sound guiding tube 200. Due to this vibration, the sound wave is propagated to the sound
guiding tube 200 and propagates in the sound guiding tube 200, and the sound in which the
bass is amplified in the front direction of the speaker device is emitted from the opening 250.
[0041]
Even with such an array-type speaker device, it is easy to reproduce a powerful low-pitched
speaker that does not give a sense of discomfort to the listener while being thin and small, as in
the first embodiment described above. Can be realized with the following configuration. Also in
the case of the present embodiment, as shown in FIG. 3, by making part of the back surface wall
112 facing the diaphragm 110 into the detachable flat material 140, vibration such as attaching
a weight to the diaphragm 110 is made. Characteristic adjustment of the plate 110 can be easily
performed.
[0042]
Further, in the present embodiment, although the speaker unit corresponding to the diaphragm
110 is the speaker unit for bass, the speaker unit capable of reproducing not only the bass but
also the midrange can be reproduced, and the whole range including the bass can be reproduced.
It may be a speaker unit. In such a case, even if the speaker unit includes not only the low
frequency range but also other frequency ranges, the frequency range in which the diaphragm
resonates is mainly the low frequency range, and the same effect as in the above embodiment
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can be obtained. Can.
[0043]
In the present embodiment, four high-sound speaker units, four mid-sound speaker units, and
two low-sound speaker units are shown. However, the speaker units for reproducing each sound
range have the specifications of the device. It may be set appropriately according to the situation.
[0044]
Next, a speaker device according to a third embodiment will be described with reference to the
drawings.
4A and 4B are a front view and a top cross-sectional view showing a schematic configuration of
the speaker device according to the present embodiment, and FIG. 4A is a front view, and FIG. It
is sectional drawing and (C) is a top surface sectional view cut by the B-B plane which shows in
(A). In the description of the present embodiment, the longitudinal direction (lateral direction
shown in FIG. 4) of the front wall 111 of the housing 100 is the length L1 direction, and the
width direction of the front wall 111 of the housing 100 (FIG. ) Will be described as the width
W1 direction. As shown in FIG. 4, in the speaker device of the present embodiment, as in the
speaker device shown in FIG. 3 (second embodiment), the length in the thickness D1 direction
(vertical direction in FIG. 4B) is The length is significantly shorter than the length in the width
W1 direction (vertical direction in FIG. 4A), and the length in the length L1 direction (horizontal
direction in FIGS. 4A, 4B, and 4C) is A housing 100 ′ having a shape that is significantly wider
than the length in the width W1 direction is provided.
[0045]
The speaker device according to the present embodiment has a configuration in which a plurality
of speaker units are arranged in a straight line along the length L1 at predetermined intervals on
the front wall 111 (corresponding to the "first wall" of the present invention) of the housing 100.
Prepare.
[0046]
The plurality of speaker units are a plurality of high-pitched speaker units 102 each playing
high-pitched sound, a plurality of mid-tone speaker units 103 each reproduced mid-pitched
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sound, and a plurality of low-pitched sound bass units A speaker unit 104 and a plurality of total
sound range speaker units 105 for reproducing the full sound range reproduced by the
respective speaker units reproducing the predetermined sound range are provided.
[0047]
The plurality of speaker units are disposed along a linear array axis (an alternate long and short
dash line connecting A-A in FIG. 4), and four high-tone speaker units 102 are disposed at the
center of the array direction which is the length L1 direction. It is done.
The mid-tone speaker units 103 are disposed one by one on the arrangement axis so as to
sandwich the high-tone speaker unit group 102.
Furthermore, the low-pitched speaker units 104 are disposed one by one on the arrangement
axis so as to sandwich the speaker unit group including the mid-tone speaker unit 103 and the
high-pitched speaker unit 102. Furthermore, the full-range speaker units 105 are disposed one
by one on the arrangement axis so as to sandwich the speaker unit group including the low-pitch
speaker unit 104, the mid-sound speaker unit 103, and the high-sound speaker unit 102.
[0048]
A tweeter 106, which is a high-tone speaker, is disposed between the low-pitched speaker 104
and the full-range speaker unit 105 at both ends, at a position on the top surface 111 side in a
front view. At this time, the space behind the tweeter 106 has a structure in which a space
independent of other spaces in the housing 100 'is formed.
[0049]
At both ends in the extending direction of the arrangement axis in the housing 100 ', sound
guiding tubes 200' having openings 250 which are long in the width W1 direction and short in
the length L1 direction are respectively formed. The sound guiding tube 200 'is shaped to be
bent halfway as viewed from the top and bottom sides, and corresponds to the back wall 112
(the second wall of the present invention) from the opening 250' (front wall 111 side) Toward
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the side), and a portion extending in the thickness D1 direction and a portion connected to the
portion and extending from both ends in the width direction of the housing 100 ′ toward the
center direction in the length L1 direction by a predetermined length. Also in the present
embodiment, the shape of the sound guiding tube 200 'does not have to be a shape bent at a
right angle as shown in FIG. The shape should be The sound guide tube 200 'is formed such that
the cross section perpendicular to the direction in which the sound guide tube 200' extends has a
longitudinally elongated shape similar to the opening 250 at any part in the sound guide tube
200 '. ing. Such a sound guiding tube 200 ′ is formed by the first vertical intermediate wall 115,
the second vertical intermediate wall 116, the third vertical intermediate wall 117, the top wall,
the bottom wall, the side wall 114, and the back wall 112. There is.
[0050]
The first vertical intermediate wall 115 has a shape extending in the direction of thickness D1
disposed between the bass speaker 104 in the housing 100 and the tweeter 106 adjacent
thereto. The second vertical intermediate wall 116 is formed in the vicinity of the full range
speaker unit 105 of the housing 100 ′ and on the side wall 114 side in the direction of the
length L 1 of the housing 100 ′. The third vertical intermediate wall 117 is formed in the
vicinity of the tweeter 106 and on the side of the back wall 112 in the thickness D1 direction of
the housing 100 '. The third vertical intermediate wall 117 is formed to have a length including
at least the arrangement position of the full range speaker unit 105 with respect to the length L1
direction of the housing 100 '.
[0051]
The third vertical intermediate wall 117 has the same structure as the third vertical intermediate
wall 117 of the second embodiment, and includes the diaphragm 110 with the substantially Ushaped slit 107. At this time, the slit 107 is formed such that the fixed end of the diaphragm 110
is on the side wall 114 side. And the edge 120 which consists of elastic bodies is installed so that
the slit 107 may be covered. At this time, the diaphragm 110 is formed such that the position of
the slit 107 on the vibration end side corresponds to the arrangement position of the tweeter
106. Thus, the length between the fixed end and the vibrating end of the diaphragm 110 can be
set to be about 1.2 to 1.5 times the diameter of the full-range speaker unit 105. As described
above, by forming three vertical intermediate walls at both ends of the housing 100 ′, the
sealed space 300 is formed behind the full-range speaker unit 105, and the high-sound speaker
unit 102, the mid-sound speaker unit 103, A sealed space 310 is formed behind the bass speaker
104.
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[0052]
In such a structure, when the full-range speaker unit 105 emits sound, the air in the enclosed
space 300 vibrates and the sound wave is transmitted to the diaphragm 110. The diaphragm
110 is brought into resonance by this sound wave, and the amplified sound wave vibrates the air
in the sound guiding tube 200 '. Due to this vibration, the sound wave is propagated to the sound
guiding tube 200 ′ and is propagated within the sound guiding tube 200 ′, so that the sound
in which the bass is amplified in the front direction of the speaker device is emitted from the
opening 250.
[0053]
Even in the case of an array-type speaker device including such a full-range speaker unit, as in
the above-described second embodiment, it is thin and small while reproducing powerful deep
bass, and makes the listener uncomfortable. The speaker device which does not give can be
realized with an easy configuration. Also in the case of the present embodiment, as shown in FIG.
4, by making part of the back surface wall 112 facing the diaphragm 110 a detachable flat plate
140, vibration such as attaching a weight to the diaphragm 110 Characteristic adjustment of the
plate 110 can be easily performed.
[0054]
In the present embodiment, four high sound speaker units, two mid sound speaker units, two low
sound speaker units, and two full sound range speaker units are shown. The speaker unit may be
appropriately set according to the specifications of the device.
[0055]
It is a three-sided figure of the speaker apparatus which concerns on 1st Embodiment.
It is a figure explaining the sound emission process of the speaker apparatus of 1st Embodiment.
It is the front view and top surface sectional drawing which show schematic structure of the
speaker apparatus of 2nd Embodiment. It is the front view and top surface sectional drawing
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which show schematic structure of the speaker apparatus of 3rd Embodiment.
Explanation of sign
[0056]
1-housing, 2-woofer, 3-tweeter, 4-back wall (second wall), 5-slit, 6-edge, 10-diaphragm, 11-front
wall (first wall), 12-top wall , 13-bottom wall, 14A-horizontal intermediate wall, 14B-vertical
intermediate wall, 15-side wall, 20-sound guide tube, 21-horizontal tube portion, 22-vertical tube
portion, 30-enclosed space 100, 100 '- Housing, 102-high-pitch speaker unit, 103-mid-tone
speaker unit, 104-bass speaker unit, 106-tweeter, 110-diaphragm 111-front wall, 112-back wall,
114-side wall, 115, 116, 117-vertical intermediate wall, 140-flat plate, 200-sound guide tube,
300, 310-enclosed space
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