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JP2010081142

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2010081142
PROBLEM TO BE SOLVED: To provide a panel-like speaker capable of outputting a plurality of
channels of sound with excellent sound quality. A panel-like speaker has a front surface
configured of a diaphragm 2 and a back surface side of the diaphragm 2 is supported by a back
surface plate 3. The diaphragm 2 has an outer peripheral edge supported by the back plate 3 and
is provided with a plurality of sound producing areas 7 spaced forwardly of the back plate 3. A
vibrator 4 is provided at the center of the back of each sound producing area 7. Boundary
portions 8 a of the plurality of sound generation areas 7 in the diaphragm 2 are directly or
indirectly connected to a part of the back plate 3. [Selected figure] Figure 1
Panel speaker
[0001]
The present invention relates to a panel-like speaker.
[0002]
Conventionally, as shown in, for example, Patent Document 1, a panel-shaped speaker provided
along a ceiling surface or a wall surface is used, and this type of panel-shaped speaker is a
diaphragm that constitutes a front surface as shown in FIG. A vibrator is disposed between the
back plate 2 and the back plate 3 constituting the back surface.
[0003]
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1
By the way, in order to output sounds of two or more channels in the panel-like speaker, it is
conceivable to provide the vibrators 4 at a plurality of places of the diaphragm 2 as shown in FIG.
However, in this case, the vibration of the diaphragm 2 by the vibrator 4 is transmitted to the
other part, and the part of the diaphragm 2 to be vibrated by the other vibrator 4 and the other
vibrator are vibrated. There is a risk of lowering
[0004]
For example, in Patent Document 2, vibration is caused by forming a rib in a portion of the
diaphragm 2 provided with a plurality of vibration exciters 4 and located between the vibration
exciter 4 and the vibration exciter 4 in the speaker. Although there are some parts which are
difficult to prevent so that the vibrations of the respective vibrators do not interfere with each
other, the speaker is not a panel speaker.
JP-A-11-225384 JP-A-2005-244804
[0005]
The present invention has been made in view of the above-described conventional problems, and
an object of the present invention is to provide a panel-like speaker capable of outputting a
plurality of channels of sound with excellent sound quality.
[0006]
In order to solve the said subject, the panel-like speaker which concerns on Claim 1 has the
following structures.
It is a panel-like speaker in which the front surface is constituted by the diaphragm 2 and the
back surface side of the diaphragm 2 is supported by the back plate 3. The diaphragm 2 is
supported at its outer periphery by the back plate 3 and has a plurality of sound producing areas
7 spaced forwardly of the back plate 3. A vibrator 4 is provided at the center of the back of each
sound producing area 7, and a boundary portion 8 a of the plurality of sound producing areas 7
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in the diaphragm 2 is directly or indirectly connected to a part of the back plate 3.
[0007]
Moreover, the panel-like speaker which concerns on Claim 2 has the following structures in
Claim 1. FIG. The boundary portion 8 a is directly joined to a part of the back plate 3.
[0008]
Moreover, the panel-like speaker which concerns on Claim 3 has the following structures in
Claim 1. FIG. The boundary portion 8 a is connected to a part of the back plate 3 via a damping
rubber 17.
[0009]
In the invention according to claim 1, since the boundary portion of the plurality of sound
generation areas in the diaphragm is directly or indirectly connected to a part of the back plate,
the boundary portion is from the sound generation area to the next sound generation area. The
propagation of vibration can be suppressed, and each sound generation area can be vibrated and
sounded independently. Therefore, it is possible to output multiple channels of sound with
excellent sound quality while using a single diaphragm.
[0010]
In the invention according to claim 2, in addition to the effect of claim 1, the propagation of
vibration from the sound producing area to the next sound producing area is suppressed only by
directly bonding the boundary portion to a part of the back plate. be able to.
[0011]
Further, in the invention according to claim 3, in addition to the effect of claim 1, the boundary
portion is connected to a part of the back plate via the damping rubber, so the boundary portion
is transmitted to the damping rubber The energy of one vibration can be attenuated, and the
propagation of the vibration from the sound generation area to the next sound generation area
can be further suppressed.
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[0012]
Hereinafter, embodiments of the present invention will be described based on the attached
drawings.
[0013]
The panel-like speaker 1 of an example of this embodiment shown in FIG.1 and FIG.2 is attached
to the ceiling surface, wall surface, etc. of a room, and vibrates the diaphragm 2 by a plurality of
vibrators 4 which are internally mounted. Emits the sound of
[0014]
The panel-like speaker 1 is formed in a rectangular shape as a whole, and has one diaphragm 2
constituting the front, one rear plate 3 constituting the rear and supporting the rear side of the
diaphragm 2, and the diaphragm 2 The vibrator 4 is provided at a plurality of locations on the
rear face of the vehicle.
In the present embodiment, the vibrators 4 are provided at two places on the left and right of the
diaphragm 2 to make a panel-like speaker 1 capable of stereo reproduction.
[0015]
The diaphragm 2 is formed of a material which is thin and has a small specific gravity so as to be
easily vibrated by the vibrator 4.
The diaphragm 2 is provided with independent rectangular sound producing areas 7 which are
portions to be vibrated and produced by the vibrator 4 on the left and right.
Both sound producing areas 7 are in symmetrical positions in the left-right direction, and have
the same area.
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[0016]
A portion other than the sound generation area 7 in the diaphragm 2 is a non-sound generation
area 8.
That is, the sound generation area 7 is a portion divided by the non-sound generation area 8. The
non-sounding area 8 in the illustrated example is constituted by each side constituting the outer
peripheral edge of the rectangular diaphragm 2 and a linear portion 8a extending between the
middle portions of a pair of front and rear sides. It is enclosed. Of the non-sounding area 8, the
portion 8 a is the boundary between the two sounding areas 7.
[0017]
Each of the vibrators 4 receives an output signal from a sound source device such as an audio
device or a video device and vibrates using a magnetic circuit. Each exciter 4 is provided at the
center of the back of the sound producing area 7 and vibrates the vibrator 4 to vibrate the
corresponding sound producing area 7 and output signal from the sound source device in front
of the diaphragm 2. It emits a corresponding sound.
[0018]
The back plate 3 is thick and is formed of a metal material such as iron or a wood material such
as wood or wood plastic having a high specific gravity. The back plate 3 may be made of a
relatively light material such as a resin material.
[0019]
The back plate 3 is provided with a vibrator accommodating portion 11 in which a portion
corresponding to each sound emitting area 7 is protruded backward, and each vibrator
accommodating portion 11 is a box with a shallow bottom opened forward. It is formed in the
shape of a circle.
[0020]
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A portion corresponding to the non-sounding area 8 of the back plate 3 is connected to the back
surface of the diaphragm 2.
Specifically, the outer peripheral edge portion of the back plate 3 is directly bonded to the outer
peripheral edge portion of the diaphragm 2 by adhesion, and the portion 12 of the back plate 3
between the two vibrator storage portions 11 is both sound generation of the diaphragm 2 It is
directly bonded to the boundary portion 8a of the area 7 by adhesion.
[0021]
Thus, by connecting the back plate 3 to the diaphragm 2, each sound producing area 7 of the
diaphragm 2 is separated from the back portion of the vibrator housing portion 11 of the back
plate 3 on the rear side, and is formed therebetween. The vibrator 4 is accommodated in the
space 13.
[0022]
Then, as described above, a part of the back plate 3 is connected to the non-sound generation
area 8 of the diaphragm 2 so that the vibration of the non-sound generation area 8 is suppressed
when the sound generation area 7 is vibrated by the vibrator 4 The sound can be emitted with
good reproducibility by vibrating only the sound generation area 7 with certainty.
[0023]
In this case, in particular, the entire front surface of the portion 12 between the two vibrator
storage portions 11 in the back plate 3 is connected to the boundary portion 8a of each sound
producing area 7, so that vibration at the boundary portion 8a can be suppressed. .
For this reason, it is difficult for the vibration of the sound generation area 7 to be transmitted to
the vibrator 4 for vibrating the other sound generation area 7 or the other sound generation area
7, and the sound quality can be improved.
Further, by making the back plate 3 of a metal material or a wood material of high specific
gravity, the vibration of the boundary portion 8a can be further suppressed, and the sound
quality can be improved.
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[0024]
Further, the corresponding vibrators 4 attached to the diaphragm 2 are stored in each vibrator
housing portion 11 so as not to be in contact with the back plate 3, whereby each vibrator 4 is
mounted in the vibrator housing portion 11. And the diaphragm 2 are placed in an independent
space 13 surrounded by the two.
[0025]
The back plate 3 can attach the panel-like speaker 1 to a wall surface, a ceiling surface or the
like.
In addition, each exciter housing portion 11 of the back plate 3 plays a role like an enclosure in a
conventional box-like speaker, such as preventing forward turning of the sound emitted rearward
from the diaphragm 2 Can.
[0026]
The speaker 1 described above is formed in a panel shape as a whole by arranging the respective
vibrators 4 in the space 13 formed between the diaphragm 2 and the back plate 3. Therefore, it
can be provided along the wall surface or the ceiling surface, or part of the wall surface or the
ceiling surface can be configured by the panel-like speaker 1.
[0027]
Next, a panel-like speaker 1 of another example shown in FIG. 3 will be described. In the
description of this example and other examples to be described later, the same components as
those of the panel-like speaker 1 of the example are given the same numbers, and the redundant
description will be omitted.
[0028]
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A weight 15 having a higher specific gravity than that of the back plate 3 is attached to the back
plate 3 of the panel-like speaker 1 of this embodiment. The weight 15 is fitted on the back
surface of the back plate 3 in the groove 16 formed between the vibrator housing portions 11 so
as to be flush with the back surface of the vibrator housing portion 11, and the bottom surface of
the groove 16 is configured. The portion 12 is connected by adhesion.
[0029]
By providing the weight 15 on the back plate 3 in this manner, the vibration of the back plate 3
can be suppressed, and the vibration of the non-sounding area 8 of the diaphragm 2 connected
to the back plate 3 can be further suppressed. In particular, by providing the weight 15 at the
portion 12 of the back plate 3, the vibration of the boundary portion 8a of the two sound
producing areas 7 of the diaphragm 2 can be further prevented, and the sound quality can be
further improved.
[0030]
Next, another panel-like speaker 1 shown in FIG. 4 will be described.
[0031]
The panel-like speaker 1 in one example is one in which the boundary portion 8a of the
diaphragm 2 is directly connected and fixed to a part of the back plate 3, but in the panel-like
speaker 1 of this embodiment, the boundary portion 8a of the diaphragm 2 is It is indirectly
connected to and fixed to a part of the back plate 3.
[0032]
The back plate 3 is formed in a box shape having a shallow bottom opening forward, and the
back portion is formed in a flat plate shape.
The back plate 3 is directly connected to the diaphragm 2 only at the outer peripheral edge.
A plurality of vibrators 4 attached to the diaphragm 2 are stored in the shallow box-like back
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plate 3 so as not to be in contact with the back plate 3.
[0033]
Further, the rear surface of the damping rubber 17 is bonded to the central portion in the leftright direction corresponding to the border portion 8 a of the back plate 3 by adhesion, and the
front surface of the damping rubber 17 is the border portion of the diaphragm 2 It is joined to
the rear surface of 8a by adhesion, and, thereby, the central part of the back plate 3 in the leftright direction is connected to the boundary portion 8a via the damping rubber 17.
[0034]
Thus, by the back plate 3 being indirectly connected to the diaphragm 2, each sound producing
area 7 of the diaphragm 2 is separated from the back portion of the back plate 3 on the rear side,
and the space 13 formed therebetween is Each exciter 4 is accommodated in.
[0035]
Vibration of the boundary portion 8a can also be suppressed by indirectly connecting the
boundary portion 8a to a part of the back plate 3 as in this example.
Further, the vibration energy transmitted from the boundary portion 8 a to the damping rubber
17 is attenuated by the action of the damping rubber 17.
Therefore, also in this example, the vibration of the sound generation area 7 is difficult to be
transmitted to the other sound generation area 7 and the vibrator 4 that vibrates the sound
generation area 7, and the sound quality can be improved.
[0036]
The vibration control rubber 17 is provided over the entire length of the space in the shallow
box-like back plate 3 in the front-rear direction, and the space is divided into two independent
left and right spaces 13, 13. . In each space 13, one exciter 4 is disposed.
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[0037]
The back plate 3 in this example can also use the panel-like speaker 1 as an attachment point to
a wall surface, a ceiling face or the like, and can play a role like an enclosure in a conventional
box-like speaker.
[0038]
In addition, although the panel-like speaker 1 of each said example provided two vibrators 4, for
example, three or more vibrators are provided, such as providing four vibrators 4 as shown in
FIG. The present invention may be applied to a multi-channel speaker which can provide 4 and
output sounds of three or more channels.
[0039]
It is sectional drawing which shows the panel-like speaker of an example of embodiment of this
invention.
It is a perspective view of the panel shape speaker same as the above.
It is sectional drawing of the panel-like speaker of another example. It is sectional drawing of the
panel-like speaker of another example. It is sectional drawing of the panel-like speaker of another
example. It is sectional drawing of the conventional panel-like speaker.
Explanation of sign
[0040]
1 panel-like speaker 2 diaphragm 3 back plate 4 vibrator 7 sound generation area 8a boundary
part
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