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DESCRIPTION JP2017050844

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DESCRIPTION JP2017050844
Abstract: The present invention provides a speaker device vehicle and an AV device that are
provided with a plurality of speaker units and can suppress the deterioration of reproduction
sound quality. A speaker device 1 has a first diaphragm 31 and a first magnetic circuit 33 for
driving the first diaphragm 31, and a first speaker unit for reproducing a sound signal including
a predetermined frequency band; It has a second magnetic circuit 43 for driving the second
diaphragm 41 and the second diaphragm 41, and comprises a second speaker unit for
reproducing a sound signal including a frequency band substantially the same as the
predetermined frequency band. At least one of the spaces 51 sandwiched by the first speaker
unit and the second speaker unit includes one or more cabinets to which the first speaker unit
and the second speaker unit are attached such that the radiation directions of the sound face
each other. The part communicates with the outside of the cabinet, and the first diaphragm 31
and the second diaphragm 41 vibrate in opposite directions when the sound signal of the
speaker device 1 is reproduced. [Selected figure] Figure 3A.
Speaker apparatus, vehicle and AV device
[0001]
The present invention relates to a speaker device, a vehicle equipped with the same, and an AV
apparatus.
[0002]
The speaker device is mounted on a vehicle, an AV device, a mobile body, a mobile device, a
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building or the like.
In recent years, there has been a demand for downsizing and space saving of a speaker device,
and even if it is compact, it is required to be able to reproduce a wide band with high output and
to reproduce with low distortion reproduction sound.
[0003]
When miniaturizing a speaker device, due to size restrictions, the size of members that support
the vibration system, such as edges and dampers, can not be secured sufficiently, and the
supporting force of the diaphragm is asymmetric with respect to the displacement zero position
of the diaphragm. It often happens. Here, the position of zero displacement is the position of the
diaphragm when there is no drive signal input to the speaker device. In addition, due to thickness
restrictions, the driving force of the diaphragm may be asymmetrical with respect to the position
of zero displacement of the diaphragm. Since the asymmetry of the supporting force of the
diaphragm and the driving force causes distortion of the reproduced sound, it becomes an
inhibiting factor when miniaturizing the speaker device and increasing the output.
[0004]
On the other hand, a speaker device has been proposed that reduces distortion of reproduced
sound due to asymmetry of supporting force of speaker diaphragm and asymmetry of driving
force, and at the same time reduces cabinet vibration (for example, patent documents) 1).
[0005]
FIG. 10 is a diagram showing a configuration of a conventional (Patent Document 1) speaker
device.
In the speaker device 80 shown in FIG. 10, the first speaker unit 83 and the second speaker unit
84 are fixed to the first opening 85a and the second opening 85b, respectively, and the first
speaker frame 87 and the second And a connecting member 86 for connecting the speaker frame
88 of FIG. As a result, the vibrations generated by the vibrations of the diaphragms of the first
speaker unit 83 and the second speaker unit 84 cancel each other, and the vibrations of the
speaker units 83 and 84 and the cabinet 82 can be prevented. In addition, the sum of the driving
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forces of the diaphragms of the respective speakers is symmetrical about the stationary position
of the diaphragm at the time of no input, and the secondary distortion of the loudspeakers can be
significantly reduced.
[0006]
Japanese Patent Application Laid-Open No. 11-178085
[0007]
However, in the configuration of the conventional speaker device as shown in FIG. 10, the
distance between the first opening 85a and the second opening 85b is large.
Therefore, there is a problem that the path difference of the sound reproduced by the first
speaker unit 83 and the second speaker unit 84 is large, phase interference occurs, and the
reproduction sound quality is degraded.
[0008]
The present invention has been made in view of such conventional problems, and it is an object
of the present invention to provide a speaker device and the like that can suppress a reduction in
reproduced sound quality while being equipped with a plurality of speaker units.
[0009]
In order to achieve the above object, a speaker device according to an aspect of the present
invention is a speaker device that reproduces a sound signal, and has a first diaphragm and a
first magnetic circuit that drives the first diaphragm. A first speaker unit for reproducing a sound
signal including a predetermined frequency band, a second diaphragm and a second magnetic
circuit for driving the second diaphragm, and a frequency band substantially the same as the
predetermined frequency band A second speaker unit for reproducing a sound signal including
the sound source, and one or more cabinets to which the first speaker unit and the second
speaker unit are attached such that the radiation directions of the sound face each other, At least
a part of the space sandwiched between the one speaker unit and the second speaker unit
communicates with the outside of the cabinet, and at the time of sound signal reproduction of the
speaker device Wherein the first diaphragm and the second diaphragm vibrates in opposite
directions.
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[0010]
According to the present invention, it is possible to realize a speaker device or the like that can
suppress a reduction in reproduced sound quality while being equipped with a plurality of
speaker units.
[0011]
FIG. 1 is a view showing an example of the appearance of the speaker device according to the
first embodiment.
FIG. 2 is a cross-sectional view taken along line X1-X2 of FIG.
FIG. 3A is an example of a cross-sectional structural view of the speaker device in the first
embodiment.
FIG. 3B is a detailed sectional structural view of the first speaker unit shown in FIG. 3A. FIG. 4 is
an example of a cross-sectional structural view of the speaker device in the first modification.
FIG. 5 is an example of a cross-sectional view of a speaker device according to a second
modification. FIG. 6 is an example of a cross-sectional view of a speaker device according to a
third modification. FIG. 7 is an example of a cross-sectional view of a speaker device according to
a fourth modification. FIG. 8A is an example of a cross-sectional structural view of the speaker
device in the second embodiment. FIG. 8B is a top schematic view of the speaker device shown in
FIG. 8A. FIG. 9A is an example of a cross-sectional view of a speaker device according to a
modification of the second embodiment. FIG. 9B is a schematic top view of the speaker device
shown in FIG. 9A. FIG. 10 is a diagram showing the configuration of a conventional speaker
device.
[0012]
A speaker device according to one aspect of the present invention is a speaker device for
reproducing a sound signal, including a first diaphragm and a first magnetic circuit for driving
the first diaphragm, and including a predetermined frequency band. A first speaker unit for
reproducing a signal, a second diaphragm, and a second magnetic circuit for driving the second
diaphragm, wherein a sound signal including a frequency band substantially the same as the
predetermined frequency band is reproduced 2 speaker unit and one or more cabinets to which
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the first speaker unit and the second speaker unit are attached so that the radiation directions of
sound face each other, the first speaker unit and the second speaker At least a part of the space
sandwiched between the unit and the outside communicates with the outside of the cabinet, and
the first diaphragm and the second diaphragm communicate with the speaker apparatus during
sound signal reproduction. The rotation plate vibrate in opposite directions.
[0013]
According to this configuration, it is possible to suppress the deterioration of the reproduction
sound quality while having a plurality of speaker units.
[0014]
More specifically, since the path difference of the sound reproduced by the first speaker unit and
the second speaker unit can be reduced to prevent the phase interference, it is possible to
suppress the deterioration of the reproduction sound quality.
[0015]
In addition, it is generated by the distortion of the reproduced sound generated by the
asymmetry of the air displacement amount by the edge and the driving force of the diaphragm
generated by the first speaker unit and the second speaker unit, respectively, and by the
vibration of each speaker unit. It is possible to reduce all the vibration of the cabinet at the same
time.
[0016]
Here, for example, the second diaphragm moves away from the second magnetic circuit when the
first diaphragm moves in a direction approaching the first magnetic circuit at the time of sound
signal reproduction of the speaker device. When operating, the first diaphragm moves in a
direction away from the first magnetic circuit, and moves in a direction approaching the second
magnetic circuit.
[0017]
Also, for example, the first speaker unit has a first edge for vibratably supporting the first
diaphragm, and the second speaker unit has a second edge for vibratably supporting the second
diaphragm. The cross-sectional shape of the first edge may be convex from the space to the first
speaker unit, and the cross-sectional shape of the second edge may be convex from the second
speaker unit to the space.
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[0018]
Further, for example, in the space, a diffusion plate may be provided at a position facing at least
one of the first diaphragm and the second diaphragm to diffuse reproduction sound of the
speaker device.
[0019]
Also, for example, the cabinet may be configured of a plurality of cabinets, and the plurality of
cabinets may be mechanically joined.
[0020]
Also, for example, a communication pipe may be provided to acoustically bond the plurality of
cabinets.
[0021]
Further, for example, the negative electrode and the positive electrode of the sound signal
voltage are connected to the positive electrode and the negative electrode of any one of the first
speaker unit and the second speaker unit, and the sound signal is connected to the other positive
electrode and the negative electrode. By connecting the positive electrode and the negative
electrode of the voltage, the first diaphragm and the second diaphragm may vibrate in opposite
directions at the time of sound signal reproduction of the speaker device.
[0022]
Also, for example, the first speaker unit may include at least one first voice coil bobbin for
transmitting a vibration to the first diaphragm, and a wire wound on an outer periphery of a
substantially central portion in the height direction of the first voice coil bobbin. And the second
speaker unit includes at least one second voice coil bobbin for transmitting vibration to the
second diaphragm, and a substantially central portion in the height direction of the second voice
coil bobbin. The second voice coil may be wound around the outer periphery of the part, and the
winding directions of the first voice coil and the second voice coil may be opposite.
[0023]
Also, for example, the first magnetic circuit has a first magnet, the second magnetic circuit has a
second magnet, and the magnetization directions of the first magnet and the second magnet are
opposite to each other. It may be
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[0024]
Each embodiment described below shows one specific example of the present invention.
The numerical values, shapes, components, order of steps, and the like shown in the following
embodiments are merely examples, and are not intended to limit the present invention.
Further, among the components in the following embodiments, components not described in the
independent claim indicating the highest concept are described as arbitrary components.
In all the embodiments, the contents of each can be combined.
[0025]
Hereinafter, a speaker device according to an aspect of the present invention will be described
with reference to the drawings.
[0026]
First Embodiment [Configuration of Speaker Device 1] FIG. 1 is a view showing an example of the
appearance of a speaker device 1 according to the present embodiment.
FIG. 2 is a cross-sectional view taken along line X1-X2 of FIG.
FIG. 3A is an example of a cross-sectional structural view of the speaker device 1 in the present
embodiment.
FIG. 3B is a detailed sectional structural view of the first speaker unit 3 shown in FIG. 3A.
[0027]
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As shown in FIG. 1, FIG. 2 and FIG. 3A, the speaker device 1 according to the first embodiment
includes a cabinet 2 including a first cabinet 2a and a second cabinet 2b, a first speaker unit 3,
and a second speaker unit 4. And the bonding member 5 to reproduce the sound signal.
[0028]
(Cabinet 2) The cabinet 2 is composed of one or more cabinets, and the first speaker unit 3 and
the second speaker unit 4 are attached such that the radiation directions of the sound face each
other.
[0029]
In the present embodiment, the cabinet 2 is composed of a plurality of cabinets of a first cabinet
2a and a second cabinet 2b.
Further, a first speaker unit is attached to the first cabinet 2a, and a second speaker unit 4 is
attached to the second cabinet 2b.
Then, at least a part of the space 51 between the first cabinet 2 a and the second cabinet 2 b (the
space 51 sandwiched by the first speaker unit 3 and the second speaker unit 4) communicates
with the outside of the cabinet 2.
[0030]
The first cabinet 2a and the second cabinet 2b preferably have the same volume.
[0031]
(Joining member 5) The joining member 5 mechanically joins a plurality of cabinets.
In the present embodiment, the joining member 5 mechanically joins the first cabinet 2a and the
second cabinet 2b.
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[0032]
Further, the joining member 5 joins a part of the outer periphery of the first cabinet 2a and the
second cabinet 2b.
Therefore, the space 51 between the first cabinet 2 a and the second cabinet 2 b, which is the
space without the joining member 5, communicates with the outside of the cabinet 2.
[0033]
(First Speaker Unit 3) As described above, the first speaker unit 3 is attached to the upper side in
the cabinet 2, that is, the first cabinet 2a side.
In the present embodiment, for example, as shown in FIG. 3B, the first speaker unit 3 includes a
first diaphragm 31, a first edge 32, a first magnetic circuit 33, a first voice coil bobbin 34, and a
first voice coil bobbin 34. A voice coil 35 is provided to reproduce a signal including a
predetermined frequency band.
[0034]
The first diaphragm 31 is disposed above the first magnetic circuit 33 in the cabinet 2 and is
vibratably supported by the first edge 32.
The first voice coil bobbin 34 is fixed to the lower side of the first diaphragm 31.
[0035]
The first edge 32 vibratably supports the first diaphragm 31.
In addition, the first edge 32 is disposed in the cabinet 2 so as to be convex upward.
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That is, the first edge 32 disposed on the upper side is convex upward.
In other words, the first edge 32 is convex with respect to the space 51 in the cabinet 2 in the
direction exposed to the outside of the space 51.
That is, the cross-sectional shape of the first edge 32 is convex from the space 51 to the first
speaker unit 3.
[0036]
The first magnetic circuit 33 includes a first magnet 33 a and the like, and drives the first
diaphragm 31. More specifically, the first magnetic circuit 33 is a circuit that generates a driving
force for driving the first voice coil 35. Here, the external magnet type magnetic circuit is a
magnetic circuit in which a magnet (magnet) is disposed outside the voice coil, and the internal
magnet type magnetic circuit is disposed a magnet (magnet) inside the voice coil. It is a magnetic
circuit. In the present embodiment, as shown in FIG. 3B, in the first magnetic circuit 33, the first
magnet 33a is disposed more inside than the first voice coil 35, and is an internal magnet type
magnetic circuit.
[0037]
The first voice coil bobbin 34 is at least one and transmits the vibration to the first diaphragm
31. More specifically, the first voice coil bobbin 34 supports the first diaphragm 31 and
transmits the vibration to the first diaphragm 31.
[0038]
The first voice coil 35 is wound on an outer periphery of a substantially central portion in the
height direction of the first voice coil bobbin 34, and has a function of converting an audio
current into vibration.
[0039]
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(Second Speaker Unit 4) As described above, the second speaker unit 4 is attached to the lower
side in the cabinet 2, that is, the second cabinet 2b side.
In the present embodiment, like the first speaker unit 3, the second speaker unit 4 includes the
second diaphragm 41, the second edge 42, the second magnetic circuit 43, the second voice coil
bobbin 44, and the second speaker unit 4. A two voice coil 45 is provided, and a signal including
a frequency band substantially the same as a predetermined frequency band reproduced by the
first speaker unit is reproduced.
[0040]
The second diaphragm 41 is disposed above the second magnetic circuit 43 in the cabinet 2 and
is vibratably supported by the second edge 42. The second voice coil bobbin 44 is fixed to the
lower side of the second diaphragm 41.
[0041]
In the present embodiment, the second diaphragm 41 is driven in the opposite direction to the
first diaphragm 31. That is, when the sound signal of the speaker device 1 is reproduced, the
second diaphragm 41 and the first diaphragm 31 vibrate in opposite directions. In other words,
when the first diaphragm 31 operates in the direction approaching the first magnetic circuit 33
at the time of sound signal reproduction of the speaker device 1, the second diaphragm 41
operates in the direction away from the second magnetic circuit 43. When the first diaphragm 31
operates in a direction away from the first magnetic circuit 33, the second diaphragm 41
operates in a direction approaching the second magnetic circuit 43. For example, the negative
electrode and the positive electrode of the sound signal voltage are respectively connected to the
positive electrode and the negative electrode of any one of the first speaker unit 3 and the
second speaker unit 4, and the other positive electrode and the negative electrode are each
connected The positive and negative electrodes are connected. As a result, the first diaphragm 31
and the second diaphragm 41 can be vibrated in opposite directions when the speaker device 1
reproduces a sound signal.
[0042]
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The second edge 42 vibratably supports the second diaphragm 41. In addition, the second edge
42 is disposed in the cabinet 2 so as to be convex upward. That is, the second edge 42 disposed
on the lower side is convex upward. In other words, the second edge 42 is convex with respect to
the space 51 in the cabinet 2 in the direction of entering the outside of the space 51. That is, the
cross-sectional shape of the first edge 32 is convex from the second speaker unit 4 to the space
51.
[0043]
The second magnetic circuit 43 includes a second magnet 43 a and the like, and drives the
second diaphragm 41. More specifically, the second magnetic circuit 43 is a circuit that
generates a driving force for driving the second voice coil 45. In the present embodiment, the
magnetization direction of the second magnet 43a and the magnetization direction of the first
magnet 33a are opposite to each other. Further, the second magnetic circuit 43 is an inner
magnet type magnetic circuit, like the first magnetic circuit 33, in which the second magnet 43a
is disposed inside the second voice coil 45.
[0044]
The second voice coil bobbin 44 is at least one and transmits the vibration to the second
diaphragm 41. More specifically, the second voice coil bobbin 44 supports the second diaphragm
41 and transmits the vibration to the second diaphragm 41.
[0045]
The second voice coil 45 is wound on the outer periphery of a substantially central portion in the
height direction of the second voice coil bobbin 44, and has a function of converting an audio
current into vibration. In the present embodiment, the winding direction of the second voice coil
45 and the winding direction of the first voice coil 35 are opposite to each other.
[0046]
[Effects, Etc.] As described above, according to the present embodiment, it is possible to realize
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the speaker device 1 capable of suppressing the deterioration of the reproduction sound quality
while being provided with a plurality of speaker units.
[0047]
For example, according to the speaker device 1 of the present embodiment, by arranging the first
speaker unit 3 and the second speaker unit 4 to face each other, the outlets of the sound can be
summarized, so that acoustic radiation close to a point sound source ( Can play).
As a result, it is possible to realize the speaker device 1 having good sound image localization at
the time of stereo reproduction or multi-channel reproduction.
[0048]
More specifically, when a sound signal to be reproduced is applied to the speaker device 1, the
sound signal is reproduced from each of the first speaker unit 3 and the second speaker unit 4.
At this time, in the speaker device 1, when the first diaphragm 31 is displaced upward (upper
side in FIG. 3A), the second diaphragm 41 is driven downward (lower side in FIG. 3A). Similarly,
when the first diaphragm 31 is displaced downward, the second diaphragm 41 is driven to be
displaced upward. Then, these sounds are output to the space outside the cabinet 2 without a
path difference in the space 51, and these sounds are summed up and reproduced in the outside
space. That is, according to the speaker device 1 of the present embodiment, the path difference
of the sound reproduced by the first speaker unit 3 and the second speaker unit 4 can be
reduced, and the phase interference can be prevented. It can be suppressed.
[0049]
Also, for example, according to the speaker device 1 of the present embodiment, it is generated
by the asymmetry of the amount of air displacement by the edge and the driving force of the
diaphragm, which are respectively generated in the first speaker unit 3 and the second speaker
unit 4 It is possible to simultaneously reduce all the distortion of the reproduced sound and the
vibration of the cabinet 2 caused by the vibration of the respective speaker units.
[0050]
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More specifically, according to the speaker device 1 of the present embodiment, since the first
diaphragm 31 and the second diaphragm 41 are driven in the opposite direction when the sound
signal of the speaker device 1 is reproduced, The vibration of the cabinet 2 generated by the
vibration of the diaphragm 31 and the vibration of the second diaphragm 41 is canceled.
Thereby, the vibration of the cabinet 2 generated at the time of sound signal reproduction of the
speaker device 1 can be significantly reduced.
[0051]
Also, for example, according to the speaker device 1 of the present embodiment, when the first
diaphragm 31 approaches the first magnetic circuit 33 at the time of sound signal reproduction
of the speaker device 1, the second diaphragm 41 is the second magnetic circuit. It is driven
away from 43. Also, when the first diaphragm 31 moves away from the first magnetic circuit 33,
the second diaphragm 41 is driven to approach the second magnetic circuit 43. As a result, the
sum of the driving force of the diaphragm of each of the first speaker unit 3 and the second
speaker unit 4 is symmetrical with respect to the neutral point when no sound signal is applied
to the speaker device 1. The asymmetry of the driving force generated in each of the second
speaker units 4 can be offset. This can significantly reduce distortion of the reproduced sound
caused by the asymmetry of the driving force.
[0052]
Also, for example, according to the speaker device 1 of the present embodiment, since the first
diaphragm 31 and the second diaphragm 41 are driven in the opposite direction, the first edge
32 and the second edge 42 are eliminated. The sum of the air amounts can be symmetrical with
respect to the time when the sound signal is not input and the displacement of each of the first
diaphragm 31 and the second diaphragm 41 is zero. Thereby, distortion of the reproduced sound
caused by the asymmetry of the air displacement amount of each of the first edge 32 and the
second edge 42 can be significantly reduced.
[0053]
Although the first speaker unit 3 and the second speaker unit 4 have been described as having
an inner magnet type magnetic circuit as shown in FIG. 3A, the present invention is not limited to
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this and may have an outer magnet type magnetic circuit.
[0054]
(Modification 1) FIG. 4 is an example of a cross-sectional view of a speaker device 1A according
to a modification 1 of the present invention.
The same components as those in FIG. 3A are denoted by the same reference numerals and
descriptions thereof will be omitted.
[0055]
The speaker device 1A shown in FIG. 4 differs from the speaker device 1 shown in FIG. 3A in the
configuration of the first magnetic circuit 33A of the first speaker unit 3 and the second
magnetic circuit 43A of the second speaker unit 4 6 has been added. Hereinafter, differences
from the first embodiment will be mainly described.
[0056]
In the first magnetic circuit 33A, while the first magnetic circuit 33 shown in FIG. 3A is an
internal magnet type magnetic circuit, the first magnet 331 is disposed outside the first voice coil
35, and the external magnetic circuit 33A is an external magnetic circuit. Type magnetic circuit.
Similarly, in the second magnetic circuit 43A, while the second magnetic circuit 43 shown in FIG.
3A is an inner magnetic type magnetic circuit, the second magnet 431 is disposed outside the
second voice coil 45. , Is an external magnet type magnetic circuit. The other configuration is the
same as that of the first embodiment, and the description is omitted.
[0057]
The reflecting plate 6 is disposed at a position facing at least one of the first diaphragm 31 and
the second diaphragm 41, and diffuses the reproduction sound of the speaker device 1A. In the
present embodiment, the reflecting plate 6 is composed of a reflecting plate 6a and a reflecting
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plate 6b. The reflector 6 a reflects the sound reproduced by the first speaker unit 3 in the
horizontal direction. The reflection plate 6 b reflects the reproduction sound reproduced by the
second speaker unit 4 in the horizontal direction.
[0058]
The speaker device 1A can efficiently output sound in the horizontal direction by including the
reflection plate 6a and the reflection plate 6b. Further, since the cabinet 2 is cylindrical as shown
in FIG. 1, the speaker device 1A can form a nondirectional sound source without directivity in the
horizontal direction.
[0059]
In addition, the speaker device 1A includes the reflection plate 6a and the reflection plate 6b, so
that the volume of the space 51 can be set to the space 51a surrounded by the reflection plate 6a
and the first speaker unit 3, the reflection plate 6b, and the second speaker unit 4 And the
volume of the space 51b surrounded by. As a result, since the capacitor components contributing
to the respective resonance frequencies of the space 51a and the space 51b can be reduced, the
reproduction quality of the high region can be further improved.
[0060]
Although the configuration shown in FIG. 4 includes both the reflecting plate 6a and the
reflecting plate 6b, only one of them may be used. Further, the reflecting plate 6a and the
reflecting plate 6b may be an acoustic horn for improving the reproduction efficiency of the
speaker device 1A.
[0061]
(Modification 2) FIG. 5 is an example of a cross-sectional view of a speaker device 1B according
to a modification 2 of the present invention. The same components as those in FIGS. 3A and 4 are
denoted by the same reference numerals, and the description thereof is omitted.
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[0062]
The speaker device 1B shown in FIG. 5 differs in configuration from the speaker device 1A
shown in FIG. 4 in that a reflecting plate 7 is further added. Hereinafter, differences from the first
modification will be mainly described.
[0063]
The reflecting plate 7 has a function of further reducing the volume of the space 51 a
surrounded by the reflecting plate 6 a and the first speaker unit 3. In addition, the reflection
plate 7 reflects the sound reproduced by the first speaker unit 3 in the vertical direction.
[0064]
As a result, since the capacitor components contributing to the respective resonance frequencies
of the space 51a and the space 51b can be reduced, the reproduction quality of the high region
can be further improved.
[0065]
(Modification 3) FIG. 6 is an example of a cross-sectional view of a speaker device 1C according
to a modification 3 of the present invention.
The same components as those in FIGS. 3A and 4 are denoted by the same reference numerals,
and the description thereof is omitted.
[0066]
The speaker device 1C shown in FIG. 6 is different from the speaker device 1A shown in FIG. 4 in
the method of attaching the first speaker unit 3, that is, the arrangement of the first speaker unit
3. Hereinafter, differences from the second modification will be mainly described.
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[0067]
That is, as shown in FIG. 6, the first speaker unit 3 is attached in the up and down direction as
compared with the case shown in FIG. 4, that is, the first diaphragm 31 and the reflector 6a are
opposed to each other. The speaker unit 3 may be disposed.
[0068]
Although the asymmetry of the driving force between the first diaphragm 31 and the second
diaphragm 41 is not improved by this configuration, reproduction due to the symmetry of the
sum of the amounts of air excluded by the first edge 32 and the second edge 42 The effects of
reducing distortion and reducing vibration of the first cabinet 2a can be obtained.
[0069]
Further, with this configuration, since the first magnetic circuit 33A and the second magnetic
circuit 43A are not exposed to the outside of the cabinet 2, it is possible to prevent foreign
matter from entering the first magnetic circuit 33A and the second magnetic circuit 43A.
[0070]
(Modification 4) FIG. 7 is an example of a cross-sectional view of a speaker device 1D according
to a modification 4 of the present invention.
The same components as those in FIG. 3A, FIG. 4 and FIG.
[0071]
The speaker device 1D shown in FIG. 7 differs from the speaker device 1C shown in FIG. 6 in the
configurations of the first speaker unit 3 and the second speaker unit 4.
Hereinafter, differences from the third modification will be mainly described.
[0072]
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The first speaker unit 3 shown in FIG. 7 is the same as the first speaker unit 3 shown in FIG. 6
except for the first diaphragm 31D, the first edge 32D, the first magnetic circuit 33, and the first
voice coil bobbin 34D. Configuration is different.
That is, the first magnetic circuit 33 shown in FIG. 7 is an inner magnetic type magnetic circuit,
and the positions of the first diaphragm 31D, the first edge 32D and the first voice coil bobbin
34D are opposite to the first magnetic circuit 33. It is done.
[0073]
Further, the second speaker unit 4 shown in FIG. 7 differs from the second speaker unit 4 shown
in FIG. 6 in that the configuration of the second magnetic circuit 43 is an internal magnet type
magnetic circuit.
[0074]
With this configuration, the volume of the space enclosed by the reflection plate 6a and the first
speaker unit 3 (the front volume of the reflection plate 6a) can be reduced, and the speaker
device 1D emits sound more evenly in the horizontal direction. Is possible.
[0075]
Second Embodiment FIG. 8A is an example of a cross-sectional view of a speaker device 1E
according to a second embodiment.
FIG. 8B is a schematic top view of the speaker device 1E shown in FIG. 8A.
FIG. 8A corresponds to a cross-sectional view taken along line A-O-B shown in FIG. 8B. The same
components as in FIG. 7 will be assigned the same reference numerals and descriptions thereof
will be omitted.
[0076]
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The speaker device 1E shown in FIGS. 8A and 8B is the same as the speaker device 1D shown in
FIG. 7 except for the first cabinet portion 21a, the second cabinet portion 21b, the cabinet box
2e, the speaker unit 8, and the communication tube 9. The configuration is different in that and
are added. Hereinafter, differences from the fourth modification and the like will be mainly
described.
[0077]
The cabinet box 2e is provided on the top of the speaker device 1E, and the speaker unit 8 is
attached. The diameter of the cabinet box 2e is the same as the diameter of the cabinet 2, that is,
the diameters of the first cabinet 2a and the second cabinet 2b.
[0078]
The speaker unit 8 is, for example, a speaker unit that handles a high-pitched portion such as a
tweeter, and its diaphragm is attached so as to communicate with the outside of the cabinet box
2e.
[0079]
The communication tube 9 is a hollow columnar body acoustically joining a plurality of cabinets.
In the present embodiment, the communication tube 9 includes a first cabinet portion 21a in
which a portion of the first cabinet 2a is opened, a second cabinet portion 21b in which a portion
of the second cabinet 2b is opened, and a third cabinet And a portion 22. The communication
pipe 9 acoustically connects the first cabinet 2a and the second cabinet 2b.
[0080]
With this configuration, even if the volume of the first cabinet 2a and the volume of the second
cabinet 2b are not matched, the volume of the first cabinet 2a and the volume of the second
cabinet 2b can be shared, so the capacitor component contributing to the resonance frequency
Therefore, the distorted sound of the first speaker unit 3 and the second speaker unit 4 can be
effectively reduced.
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[0081]
(Modification) FIG. 9A is an example of a cross-sectional view of a speaker device 1F according to
a modification of the second embodiment.
FIG. 9B is a schematic top view of the speaker device 1F shown in FIG. 9A. FIG. 9A corresponds to
a cross-sectional view taken along line A-O-B shown in FIG. 9B. The same components as those in
FIGS. 7, 9A and 9B are denoted by the same reference numerals, and the description thereof is
omitted.
[0082]
The speaker device 1F shown in FIGS. 9A and 9B differs from the speaker device 1E shown in
FIGS. 8A and 8B in the configuration of the cabinet box 2f. Hereinafter, differences from
Embodiment 2 will be mainly described.
[0083]
The cabinet box 2f is provided in the vicinity of the spaces 51a and 51b of the speaker device 1F,
and is provided so as not to block the spaces 51a and 51b. In addition, a speaker unit 8 is
attached to the cabinet box 2 f.
[0084]
The speaker unit 8 is attached to the cabinet box 2f, and its diaphragm is attached so as to
communicate with the outside of the cabinet box 2f.
[0085]
With this configuration, since the positions of the first speaker unit 3 and the second speaker
unit 4 are close to each other, the speaker unit 8 serving the high-pitched portion is close to each
other, and these sounds are added and reproduced in the space outside the spaces 51a and 51b.
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21
Ru.
As described above, according to the present modification, it is possible to reduce the path
difference of the sounds reproduced by the first speaker unit 3, the second speaker unit 4 and
the speaker unit 8.
[0086]
As described above, according to the speaker device 1F of this modification, compared to the
case where the first speaker unit 3 and the second speaker unit 4 are separated from the speaker
unit 8 and there is a path difference in the reproduced sound, The reproduction sound quality
can be further improved.
[0087]
As mentioned above, although the speaker apparatus of this invention was demonstrated based
on embodiment etc., this invention is not limited to this embodiment.
Without departing from the spirit of the present invention, various modifications that may occur
to those skilled in the art may be made to the present embodiment, or a form constructed by
combining components in different embodiments is also included in the scope of the present
invention. .
[0088]
For example, in the above-described embodiment and the like, the first cabinet 2a and the second
cabinet 2b constituting the cabinet 2 are mechanically joined by the joining member 5 to be
sandwiched between the first cabinet 2a and the second cabinet 2b. However, the present
invention is not limited thereto. The first cabinet 2 a and the second cabinet 2 b may be
connected, and at least one opening may be provided at a position corresponding to the space
51.
[0089]
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22
Further, a so-called bass reflex system in which an acoustic port is attached to each of the first
cabinet 2a and the second cabinet 2b constituting the cabinet 2 may be used to improve the bass
reproduction performance. As described in the second embodiment, when the speaker device
includes the communication tube, either the first cabinet 2a or the second cabinet 2b may
include the acoustic port. By providing the communication pipe, it is possible to obtain the same
effect as when the acoustic port is attached to each of the first cabinet 2a and the second cabinet
2b.
[0090]
Further, the speaker apparatus of the present invention may be of any speaker cabinet system
such as a back load horn as well as the bass reflex system.
[0091]
In addition, the speaker device according to the present invention is an audio device, an AV
device including a television, a mobile device such as a notebook computer, a speaker mounted
on a vehicle such as a car, and an ANC as a high quality speaker with little distortion of
reproduced sound. A speaker (active noise canceller) or the like may be provided.
It has a cabinet and a plurality of speaker units, and can be realized as a high sound quality
speaker with little distortion of reproduced sound.
[0092]
The present invention can be used for audio devices, AV devices including TVs, mobile devices
such as notebook computers, speakers mounted on vehicles such as cars, and speaker devices
used for ANC speakers.
[0093]
1, 1A, 1B, 1C, 1D, 1F Speaker device 2 cabinet 2a first cabinet 2b second cabinet 2e, 2f cabinet
box 3 first speaker unit 4 second speaker unit 21a first cabinet portion 21b second cabinet
portion 31, 31D 1st diaphragm 32, 32D 1st edge 33, 33A 1st magnetic circuit 33a, 331 1st
magnet 34, 34D 1st voice coil bobbin 35 1st voice coil 41 2nd diaphragm 42 2nd edge 43, 43A
Second magnetic circuit 43a, 431 Second magnet 51, 51a, 51b Space
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