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JP2015192291

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2015192291
The present invention provides a speaker device and an assembly set of the speaker device,
which are devised to improve bass characteristics without increasing the area of a baffle plate.
SOLUTION: A diaphragm 21 is provided by covering a diaphragm 21 in the speaker unit 2 having
a speaker unit 2 having a diaphragm 21 vibrating in the front and rear direction and a baffle
plate 31 from the front. The speaker unit 2 emits an acoustic wave from the diaphragm 21 to the
propagation space S, and the space definition member 32 transmits the acoustic wave to the
diaphragm 21 in the propagation space. It has an opposing portion 321 opposed via S and an
opening 31a for opening the propagation space S in one of the crossing directions intersecting
with the vibration direction of the diaphragm 21, and the baffle plate 31 is the diaphragm 21.
The opposing portion 321 is vibrated by the sound wave radiated to the propagation space S.
[Selected figure] Figure 1
Speaker apparatus and assembly set of speaker apparatus
[0001]
The present invention relates to a speaker device including a speaker unit having a diaphragm
and a baffle plate, and an assembly set thereof.
[0002]
A baffle plate that blocks sound waves radiated to the rear side of the speaker unit from coming
to the front side, in order to prevent the sound waves of the opposite phase radiated back and
forth from the diaphragm such as cone paper in the speaker unit A flat baffle type speaker device
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1
is known.
This flat baffle type speaker device is a system in which the sound wave radiated to the rear side
of the speaker unit is blocked only by the baffle plate so as not to come to the front side, the rear
side of the speaker unit is released, and the diaphragm is a back pressure It vibrates without
being hit. For this reason, compared with the closed type or bass reflex type in which the back
pressure is applied to the diaphragm and the operation of the diaphragm is suppressed, the flat
baffle type speaker device can enjoy the reproduction of the open sound. However, since it is
difficult to completely block sound waves in the low-frequency range that would wrap around
from the rear side to the front side of the speaker unit, the flat-baffle type speaker device has
lower reproduction capabilities than the closed or bass reflex type. It is easy to be inferior.
[0003]
Here, there has been proposed a speaker device in which an attempt is made to improve the
reproduction capability of the low frequency range by improving the conventional baffle plate
which is constituted of a thick and rigid plate (see, for example, Patent Document 1). Although
the speaker device described in Patent Document 1 uses an enclosure, the thickness of the baffle
plate is set to 0.1 mm to 9.0 mm, and the baffle plate is vibrated by the vibration of the
diaphragm of the speaker unit. It emits sound waves in the low frequency range. The baffle plate
in the speaker device described in Patent Document 1 is applied to a speaker device in which the
rear side of the speaker unit is released like a flat baffle type speaker device, maintaining the
advantage that sound with an open feeling can be reproduced. It is conceivable to improve the
reproduction capability in the low range.
[0004]
JP 10-84594
[0005]
The baffle plate in the speaker device of Patent Document 1 can enlarge the area of the portion
to which the sound wave in the low frequency range is emitted by enlarging the area (plate
surface).
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However, depending on the place where the speaker device is installed, the size of the speaker
device may be limited, and it may be difficult to expand the area of the baffle plate. Further, as
the area of the baffle plate is enlarged, the enlarged portion is separated from the diaphragm of
the speaker unit, so that the vibration of the diaphragm becomes difficult to follow. If the
vibration of the baffle plate does not follow the vibration of the diaphragm, cancellation of the
sound wave emitted from the diaphragm and the sound wave emitted from the baffle plate may
occur, or turbidity of the sound may occur.
[0006]
An object of the present invention is to provide a speaker device and an assembly set of the
speaker device in which the low-pitch characteristics are improved without enlarging the area of
the baffle plate in view of the above-mentioned circumstances.
[0007]
A speaker device according to the present invention for solving the above-mentioned object has a
speaker unit having a diaphragm that vibrates in the front-rear direction, and a baffle plate, and
the speaker unit is attached to the baffle plate. And a space defining member defining a
propagation space in front of the diaphragm by covering the diaphragm from the front, and the
speaker unit emits an acoustic wave to the propagation space when the diaphragm vibrates. The
space-defining member includes an opposing portion facing the diaphragm via the propagation
space, and an opening for opening the propagation space in one of the intersecting directions
intersecting the vibration direction of the diaphragm. And the baffle plate is vibrated by the
vibration of the diaphragm, and the opposite portion is generated by the sound wave radiated to
the propagation space. And characterized in that the vibrating Te.
[0008]
Here, the baffle plate and the space defining member may be made of a corrugated board, a
hollow polycarbonate board, a solid polycarbonate board, or a veneer board.
[0009]
According to the speaker device of the present invention, when the baffle plate is vibrated by the
vibration of the diaphragm, sound waves (vibration of air) in a low frequency range are emitted
from the baffle plate.
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Further, when the vibration plate vibrates, the opposite part is also vibrated by the sound wave
radiated to the propagation space, and the sound wave of the bass range is also radiated from the
opposite part.
Furthermore, in the propagation space, the opposite portion or the baffle plate is also vibrated by
the sound wave reflected by the opposite portion or the baffle plate, and the sound wave in the
low sound range is emitted.
As a result, the bass characteristic can be improved without increasing the area of the baffle
plate. Further, since the space defining member has an opening for opening the propagation
space in one of the crossing directions intersecting the vibration direction of the diaphragm, the
sound wave emitted from the diaphragm is The light is emitted from the opening while being
reflected by the facing portion and the baffle plate. As a result, pressure is less likely to be
applied to the vibrating plate, and the vibration of the vibrating plate can be prevented from
being disturbed. In addition, although the sound wave of the middle to high range is also radiated
by the vibration of the baffle plate and the opposing part, the baffle plate is particularly vibrated
by the vibration of the low range of the diaphragm, and the opposing part is from the diaphragm.
Since the vibration is generated particularly by the sound waves in the low sound range to be
emitted, a large amount of sound waves in the low sound range is emitted from the baffle plate
and the opposite part.
[0010]
In the speaker device of the present invention, the space defining member has a shape in which
the propagation space gradually expands from the opposite side to the opening toward the
opening, and the facing portion is directed to the opening It is preferable that it separates from
the said baffle board according to.
[0011]
By doing this, the sound wave of medium to high frequency sound radiated from the diaphragm
is easily emitted from the opening while being reflected by the opposing portion and the baffle
plate in the propagation space.
As a result, standing waves are less likely to occur, and sound turbidity can be reduced.
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[0012]
Further, in the speaker device of the present invention, the baffle plate may be one in which the
speaker unit is attached to the side opposite to the opening.
[0013]
By so doing, it becomes easy to secure the number of times the sound wave radiated from the
diaphragm is reflected by the opposing portion and the baffle plate in the propagation space, and
it becomes easier to vibrate the opposing portion and the baffle plate .
[0014]
Furthermore, in the speaker device according to the present invention, the space defining
member has a connection portion connecting the baffle plate and the opposite portion, and the
connection portion includes a deformation promoting means for promoting its own deformation.
It may be
[0015]
By means of the deformation promoting means, the connection portion can be easily deformed,
and the vibration of the opposing portion can be suppressed from being limited.
[0016]
Further, in the speaker device according to the present invention, at least one of the baffle plate
and the facing portion has a bent piece that is bent so as to shield a part of the opening, and the
bent piece is A tension may be applied to the baffle plate or the facing portion.
[0017]
Since the bent piece is bent so as to be able to shield a part of the opening, the bending piece
reflects, in particular, the sound wave in the middle to high range emitted from the opening, and
the opening is opened. The direction of the sound wave emitted from the unit can be adjusted.
In addition, for example, by bending the bent pieces largely, tension can be applied to the baffle
plate and the facing portion, and excessive vibration of the baffle plate and the facing portion can
be suppressed.
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[0018]
An assembly set of a speaker device according to the present invention for solving the above
object has a speaker unit having a diaphragm that vibrates in the front-rear direction, and a
baffle plate, and the speaker unit is attached to the baffle plate and attached And a space defining
member which defines a propagation space in front of the diaphragm by covering the diaphragm
in a unit from the front, and the speaker unit emits an acoustic wave to the propagation space by
the vibration of the diaphragm. The space-defining member is an opening that opens the
propagation space in one of an opposing portion facing the diaphragm via the propagation space
and a cross direction intersecting the vibration direction of the diaphragm. And the baffle plate is
vibrated by the vibration of the diaphragm, and the opposing portion is radiated to the
propagation space. Characterized in that the is to vibrate by sound waves.
[0019]
According to the assembly set of the speaker device of the present invention, by adopting the
above-described configuration, it is possible to obtain a speaker device in which a device for
improving the bass characteristic is made without enlarging the area of the baffle plate.
[0020]
The baffle plate may have an opening for attaching the speaker unit, or a plurality of small holes
may be formed at a position facing the diaphragm of the speaker unit.
Also, the opening or the plurality of small holes may be formed in advance in the baffle plate, or
may be formed later by a person who assembles the assembly set.
[0021]
According to the present invention, it is possible to provide a speaker device and an assembly set
of the speaker device, which are devised to improve the bass characteristics without increasing
the area of the baffle plate.
[0022]
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(A) is a front view of the speaker apparatus which is one Embodiment of this invention, (b) is AA
sectional drawing of the speaker apparatus shown to (a).
(A) is a rear view of the speaker apparatus shown to Fig.1 (a), (b) is the figure which looked at the
speaker apparatus shown to Fig.1 (a) from upper direction.
It is a figure which shows an example of the assembly method using the assembly set of the
speaker apparatus shown to FIG. 1 and FIG.
(A) is a front view of the 1st modification of the speaker apparatus shown to FIG. 1 and FIG. 2, (b)
is AA sectional drawing of the speaker apparatus shown to (a).
(A) is a front view of the 2nd modification of the speaker apparatus shown to FIG. 1 and FIG. 2,
(b) is AA sectional drawing of the speaker apparatus shown to (a).
[0023]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0024]
Fig.1 (a) is a front view of the speaker apparatus which is one Embodiment of this invention, and
the figure (b) is AA sectional drawing of the speaker apparatus shown to the figure (a).
2 (a) is a rear view of the speaker device shown in FIG. 1 (a), and FIG. 2 (b) is a view of the
speaker device shown in FIG. 1 (a) from above.
[0025]
As shown in FIGS. 1 and 2, the speaker device 1 includes a speaker unit 2, a vibrating body 3,
and a pedestal 4.
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The vibrator 3 has a baffle plate 31 and a space defining member 32, and the speaker unit 2 is
attached to the baffle plate 31.
Hereinafter, the vibrating body 3 and the speaker unit 2 attached to the baffle plate 31 of the
vibrating body 3 may be collectively referred to as an apparatus main body 10. The device body
10 is supported by the pedestal 4.
[0026]
The speaker unit 2 includes a diaphragm 21 made of cone paper, a frame 22 supporting the
diaphragm 21, a magnetic circuit unit 23 vibrating the diaphragm 21, and a lead wire (not
shown) that sends an audio signal to the magnetic circuit unit 23. The In the present
embodiment, a full range unit with a diameter of 16 cm is used as the speaker unit 2. As shown
in FIG. 2B, the baffle plate 31 is provided with an opening 31a, and the speaker unit 2 is attached
to the baffle plate 31 in a state where the diaphragm 21 is exposed from the opening 31a. Note
that a plurality of small holes may be provided instead of the opening 31a. In FIG. 1B, the device
body 10 is supported by the base 4 in a posture in which the speaker unit 2 is directed slightly
upward on the right side, and the right side of the speaker device 1 is the front side (listener
side). In FIG. 1B, the diaphragm 21 is hidden by the frame 22, but the vibration direction of the
diaphragm 21 is indicated by straight double arrows. As indicated by the straight double arrows,
the diaphragm 21 vibrates in a direction connecting the slightly obliquely upper side on the right
side and the slightly obliquely lower side on the left side in FIG. 1 (b). Hereinafter, the left-right
direction of FIG. 1B is referred to as the front-rear direction of the speaker device 1 including the
direction in which the diaphragm 21 vibrates, and the direction orthogonal to the sheet of FIG. It
is called and explained. In FIGS. 1A and 2A, the direction orthogonal to the paper surface is the
front-rear direction of the speaker device 1, and the left-right direction of the drawing is the leftright direction of the speaker device 1. Further, in FIG. 2B, the vertical direction of the drawing is
the front-rear direction of the speaker device 1, and the horizontal direction of the drawing is the
left-right direction of the speaker device 1.
[0027]
In the present embodiment, the vibrating body 3 is configured by bending a corrugated board.
The vibrating body 3 may be configured by bending a polycarbonate hollow plate or a solid plate,
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or may be configured by bonding a corrugated plate, a polycarbonate hollow plate or a solid
plate, a veneer plate, or the like. . The vibrator 3 may be configured by integrally molding a resin
such as polycarbonate. Furthermore, in the vibrator 3, the baffle plate 31 and the space defining
member 32 may be integrally or integrally configured, or the baffle plate 31 is detachably
attached to the space defining member 32. It may be By adopting an aspect in which the baffle
plate 31 is detachably attached to the space defining member 32, the baffle plate 31 is removed
from the space defining member 32 in combination with the speaker unit 2, and for example, the
speaker units 2 having different diameters are It can be replaced with the baffle plate 31
attached.
[0028]
As shown in FIG. 2A, the baffle plate 31 has a substantially rectangular shape, and the speaker
unit 2 is attached to the lower portion of the baffle plate 31. As shown in FIG. The size of the
baffle plate 31 is not particularly limited, but the size in the left-right direction is preferably
about 1.5 times to about 3.0 times the aperture diameter of the speaker unit 2, and the size in
the height direction The length is preferably about 2.5 times to 4.0 times. If the size of the baffle
plate 31 is smaller than the above range, the effect of improving the bass characteristic may be
insufficient. On the other hand, when the size of the baffle plate 31 becomes larger than the
above range, a portion which does not vibrate following the vibration of the diaphragm 21 is
generated, and the sound wave emitted from the diaphragm 21 and the sound wave emitted from
the baffle plate 31 Sound turbidity may occur.
[0029]
As shown in FIG. 1 and FIG. 2, the space defining member 32 has a facing portion 321 forming
the front side portion of the vibrating body 3 and a pair of left and right connecting portions 322
and 322 connecting the facing portion 321 and the baffle plate 31. And a front bent piece 323
provided at the upper end portion of the facing portion 321. In addition, in FIG.2 (b), in order to
show propagation space S mentioned later, the front side bending piece 323 is abbreviate |
omitted. The space defining member 32 covers the diaphragm 21 of the speaker unit 2 attached
to the baffle plate 31 from the front by the facing portion 321 and the pair of left and right
connecting portions 322, 322, as shown in FIG. As shown in), the space in front of the diaphragm
21 is defined. Hereinafter, the space defined by the space defining member 32 is referred to as a
propagation space S. Further, the space defining member 32 has an opening 32a at the upper
end portion of the facing portion 321 and the pair of left and right connection portions 322, 322,
and the propagation space S is opened by the opening 32a.
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[0030]
As shown in FIG. 1 (a), the facing portion 321 has a substantially rectangular shape, and as
shown in FIG. 1 (b) and FIG. 2 (b), the facing portion 321 is formed via the propagation space S. It
faces the diaphragm 21. In FIG. 1 (b), the diaphragm 21 is hidden by the frame 22. The lower
end portion of the opposite portion 321 is connected to the lower end portion of the baffle plate
31 and is separated from the baffle plate 31 as it goes to the opening 32a. As shown in FIG. 1B,
the connection portion 322 has a substantially triangular shape, and the length in the front-rear
direction gradually increases from the lower end toward the upper side. Due to these, the
propagation space S is gradually expanded from the lower end region toward the opening 32a.
That is, the space definition member 32 has a shape in which the propagation space S gradually
expands as it goes from the opposite side to the opening 32a to the opening 32a. The connecting
portion 322 has a fold 322a extending in the vertical direction, and is bent at the fold 322a to be
slightly expanded outward in the left-right direction. Since the connection portion 322 is likely to
be deformed by bending at the fold line 322 a, it is possible to suppress that the vibration of the
facing portion 321 is limited. That is, the fold 322a corresponds to an example of the
deformation promoting means in the present invention. The connection portion 322 may be
formed in a bellows shape by forming a plurality of folds. The lengths in the front-rear direction
of the upper end portion of one connecting portion 322 and the upper end portion of the other
connecting portion 322 may be made different.
[0031]
The front bending piece 323 can be bent in the front-rear direction with respect to the facing
portion 321 as shown by a circular arc shaped double arrow in FIG. 1B, and the angle adjustment
with respect to the facing portion 321 is possible. . Further, part of the opening 32a can be
shielded by bending the front bent piece 323 backward, and tension can be applied to the facing
part 321 by largely bending the front bent piece 323. The baffle plate 31 has a rear bent piece
311 which can be bent in the front-rear direction. In addition, in FIG.2 (b), in order to show
propagation space S, the back side bending piece 311 is also abbreviate | omitted. The rear bent
piece 311 can be bent with respect to the baffle plate 31 as shown by a circular arc shaped
double arrow in FIG. 1B, and the angle adjustment with respect to the baffle plate 31 is possible.
Further, a part of the opening 32a can be shielded by bending the rear bent piece 311 to the
front side, and a tension can be applied to the baffle plate 31 by largely bending the rear bent
piece 311. Furthermore, by adjusting the bending angle of the front bending piece 323 and the
rear bending piece 311, it is possible to adjust the opening area of the opening 32a which is
03-05-2019
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open upward.
[0032]
The pedestal 4 includes a pair of left and right mounting members 41 and 41 extending in the
front-rear direction, two connecting members 42 and 42 connecting the pair of left and right
mounting members 41 and 41, and the respective mounting members 41. It has a projection 43
projecting upward at the front part and two support members 44, 44 made of, for example, wire.
As shown in FIGS. 1A and 1B, the apparatus main body 10 is placed on the placement members
41 in a state where the front side of the lower end portion thereof is in contact with the
projection 43. Further, one end side portion of the support member 44 is wound around the
connection portion between the frame 22 and the magnetic circuit unit 23 of the speaker unit 2,
and the other end side portion of the support member 44 is wound around the mounting
member 41 Thus, the speaker unit 2 is supported by the support members 44 from the rear side.
Thus, in the present embodiment, the facing portion 321 is maintained in a substantially vertical
posture, and the baffle plate 31 and the diaphragm 21 are maintained in a posture inclined
toward the rear side toward the opening 32 a. The pedestal 4 is not particularly limited as long
as it can maintain the device body 10 in a predetermined posture, and for example, a pedestalshaped member for supporting the speaker unit 2 instead of the support member 44 is used. You
may use.
[0033]
The speaker device 1 of the present embodiment shown in FIGS. 1 and 2 can be, for example, an
assembly set of the speaker device 1 in which the listener himself / herself assembles and
completes components of the speaker device 1.
[0034]
FIG. 3 is a diagram showing an example of an assembly method using the assembly set of the
speaker device shown in FIGS. 1 and 2.
With reference also to FIGS. 1 and 2, FIG. 3 will be used to explain a method of assembling an
assembly set of the speaker device of the present invention.
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[0035]
As shown in FIG. 3A, first, the speaker unit 2 is attached to the baffle plate 31 of the vibrating
body 3 using a bolt and a nut, and the device body 10 is assembled. The opening 31a of the
baffle plate 31 shown in FIG. 2 (b) may be provided in advance in the baffle plate 31, or may be
formed by a person who assembles the baffle plate 31. Moreover, the vibrator 3 prepares the
corrugated board etc. and joining member which become the shape of the vibrating body 3 by
bending, and the person who assembles creates the vibrating body 3 by bending the corrugated
board etc. It is good also as a mode to do.
[0036]
Next, as shown in FIG. 3B, the apparatus body 10 is placed on the placement member 41 so that
the front side of the lower end portion thereof abuts on the projection 43 of the pedestal 4.
[0037]
Finally, as shown in FIG. 3C, with the facing portion 321 in a substantially vertical state, one end
side portion of the support member 44 is a connecting portion between the frame 22 and the
magnetic circuit portion 23 of the speaker unit 2. The other end side portion of the support
member 44 is wound around the mounting member 41.
Thereby, the speaker unit 2 is supported by the support members 44 from the rear side, and the
assembly of the speaker device 1 is completed. In addition, the assembly method of the assembly
set of the speaker apparatus 1 shown in FIG. 3 is an example, It is not limited to this assembly
method.
[0038]
The reproduction state of the speaker device 1 will be described using FIGS. 1 and 2. When the
magnetic circuit unit 23 vibrates the diaphragm 21 based on an audio signal sent from an
amplifier (not shown), the vibration of the diaphragm 21 is transmitted to the baffle plate 31 via
the frame 22. Thereby, the baffle plate 31 vibrates following the vibration of the diaphragm 21.
As the baffle plate 31 vibrates, the baffle plate 31 creates an extended state of the diaphragm 21,
and sound waves are emitted from the entire baffle plate 31. The sound wave emitted from the
03-05-2019
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vibration plate 21 by the vibration of the vibration plate 21 propagates in the air of the
propagation space S and vibrates the facing portion 321, whereby the sound wave is also emitted
from the facing portion 321. Furthermore, since the sound wave emitted from the diaphragm 21
is reflected to the facing portion 321 and the baffle plate 31 in the propagation space S, the
facing portion 321 and the baffle plate 31 are also vibrated and the sound wave is emitted. Here,
since the speaker unit 2 is attached to the lower portion of the baffle plate 31 on the opposite
side to the opening 32 a, the sound wave emitted from the diaphragm 21 is opposed to the
opposing portion 321 in the propagation space S. And the number of times of reflection on the
baffle plate 31 can be secured easily. In addition, since the connection portion 322 has the fold
line 322a, the connection portion 322 is easily deformed by the fold line 322a, and it is possible
to suppress that the vibration of the opposing portion 321 is limited. The opposing portion 321
and the baffle plate 31 are particularly vibrated by the vibration of the low frequency range of
the diaphragm 21 and the sound wave of the low frequency range radiated from the vibrating
plate 21. It is emitted. As a result, the bass characteristic of the speaker device 1 can be
improved. Note that since the sound wave in the low sound region is dull in directivity, the sound
wave in the low sound region emitted from the diaphragm 21 propagates through the air in the
propagation space S to vibrate the connection portion 322, and the connection portion 322 also
Sound waves may be emitted.
[0039]
In FIG. 1 (b), sound waves in the middle to high frequency range with sharp directivity radiated
from the diaphragm 21 are schematically shown by dotted arrows. As described above, in the
present embodiment, the facing portion 321 moves away from the baffle plate 31 as it goes from
the lower end to the opening 32a, and the space defining member 32 goes from the lower end to
the opening 32a. The propagation space S is of a shape that gradually expands. Therefore, the
sound wave in the middle to high range radiated from the diaphragm 21 is emitted from the
opening 32 a while being reflected by the facing portion 321 and the baffle plate 31. As a result,
standing waves are less likely to occur, and sound turbidity can be reduced. In addition, the
sound wave in the middle to high frequency range reflected by the facing portion 321 does not
return to the diaphragm 21 as it is, and it is possible to prevent the pressure on the diaphragm
21.
[0040]
The sound wave in the middle to high range released from the opening 32 a is reflected to the
front bending piece 323 and the rear bending piece 311. By changing the bending angle of the
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front bending piece 323 and the rear bending piece 311, the direction of the sound wave in the
middle to high range can be adjusted. Further, tension can be applied to the facing portion 321
by largely bending the front bent piece 323, and tension can be applied to the baffle plate 31 by
largely bending the rear bent piece 311. Thus, excessive vibration of the facing portion 321 and
the baffle plate 31 can be suppressed.
[0041]
Next, a modification of the speaker device 1 shown in FIGS. 1 and 2 will be described. In the
following description, differences from the speaker device 1 shown in FIG. 1 and FIG. 2 will be
mainly described, and the components having the same names as the components described
above will be denoted by the reference numerals used so far. The explanation will be given in
addition, and duplicate explanations may be omitted.
[0042]
4 (a) is a front view of a first modification of the speaker device shown in FIGS. 1 and 2, and FIG.
4 (b) is a cross-sectional view of the speaker device shown in FIG. is there.
[0043]
As shown in FIG. 4A and FIG. 4B, in the speaker device 1 of the first modified example, the space
defining member 32 has the facing portion 321 and the connecting portion 322, and FIG. 1 and
FIG. It does not have the front bent piece 323 shown in FIG.
The facing portion 321 has a curved shape so that the front side is convex in each of the left and
right direction and the up and down direction. The baffle plate 31 is curved in such a manner
that its rear side is convex in the left and right direction and in the vertical direction, but the
portion to which the speaker unit 2 is attached is planar. In addition, the baffle plate 31 does not
have the rear bent piece 311 shown in FIGS. 1 and 2. Note that the facing portion 321 may be
provided with the front bent piece 323 shown in FIGS. 1 and 2, and the baffle plate 31 may be
provided with the rear bent piece 311 shown in FIGS. 1 and 2. The opposing portion 321 and the
baffle plate 31 are connected by a pair of left and right connecting portions 322 extending in the
vertical direction. Thus, the space-defining member 32 defines the propagation space S having a
substantially spindle-like cross section.
03-05-2019
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[0044]
In the speaker device 1 of the first modified example, it is also possible to adopt an aspect in
which one of the facing portion 321 and the baffle plate 31 has a flat plate shape. Further, the
opposing portion 321 and the baffle plate 31 may be connected by the triangular connection
portion 322 shown in FIGS. 1 and 2. Furthermore, the vibrator 3 may be formed by squeezing
the lower end portion of the cylindrical member, and the propagation space S having a
substantially elliptical cross section may be defined.
[0045]
FIG. 5 (a) is a front view of a second modification of the speaker device shown in FIGS. 1 and 2,
and FIG. 5 (b) is a cross-sectional view of the speaker device shown in FIG. is there.
[0046]
As shown in FIG. 5A, the facing portion 321 in the speaker device 1 of the second modified
example has a substantially trapezoidal shape in which the size in the lateral direction gradually
increases from the lower end side toward the opening 32a. .
Similarly, the baffle plate 31 also has a substantially trapezoidal shape in which the size in the
left-right direction gradually increases from the lower end side toward the opening 32a. Thereby,
the propagation space S is expanded in the front-rear direction and the left-right direction as it
goes from the lower end side to the opening 32a.
[0047]
In the speaker device 1 of the second modification, the lower end portions of the facing portion
321 and the baffle plate 31 may be extended, and a triangular shape having an apex at the lower
end may be adopted.
[0048]
As described above, according to the speaker device 1 of the present embodiment and the
assembly set thereof, the bass characteristic can be improved without enlarging the area of the
baffle plate 31.
03-05-2019
15
[0049]
The present invention is not limited to the above-described embodiment, and various
modifications can be made within the scope of the claims.
For example, although the first modification and the second modification have been described as
the speaker device 1 as a finished product, it may be an assembly set of the speaker device 1
having the components of the speaker device 1.
In the embodiment and the modification, the apparatus main body 10 is supported by the base 4
in the posture in which the opening 32a is opened upward, but the opening 32a is opened
obliquely upward, laterally or obliquely downward The apparatus main body 10 may be
supported by the pedestal 4 in the above posture. Furthermore, in the above embodiment and
modification, a full-range speaker unit is used as the speaker unit 2; however, a speaker unit for
low frequency range is used as the speaker unit 2, and You may attach to etc.
[0050]
In addition, even if it is the component contained only in each description of embodiment and
each modification which were demonstrated above, you may apply the component to
embodiment and another modification.
[0051]
DESCRIPTION OF SYMBOLS 1 speaker device 2 speaker unit 21 diaphragm 31 baffle plate 311
rear bent piece 32 space defining member 32 a opening 321 facing portion 322 connecting
portion 322 a fold 323 front bent piece 4 pedestal
03-05-2019
16
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