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JP2003244787

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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 JP2003244787
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker, a module using the same, and an electronic device such as a portable telephone device, a
communication device or a game device.
[0002]
2. Description of the Related Art The prior art will be described with reference to FIG. FIG. 6 is a
cross-sectional view of a conventional speaker.
[0003]
According to FIG. 6, the magnetized magnet 1 is sandwiched between the upper plate 2 and the
yoke 3 to constitute an internal magnetic circuit 4. The frame 6 is coupled to the yoke 3 of the
magnetic circuit 4. A first diaphragm 7 is adhered to the peripheral portion of the frame 6, and
the voice coil 8 is coupled to the first diaphragm 7 and coupled so as to fit in the magnetic gap 5
of the magnetic circuit 4. Configured. Furthermore, a panel 9 is coupled to the peripheral portion
of the frame 6 for two units described above, and a substantially planar second diaphragm 10 is
bonded to the panel 9 to form a first diaphragm 7 and a second diaphragm 7. The diaphragms
10 are acoustically coupled by the enclosed space 11.
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[0004]
With this configuration, the shape of the enclosed space 11 can be freely designed, and the
position and shape of each diaphragm can be designed, so that the mobile phone device can be
miniaturized, thinned, and designed freely even when using a large diaphragm An improvement
can be realized. Here, 12 in the enclosed space 11 is a sound path portion for connecting the first
diaphragm 7 and the second diaphragm 10 and setting their positional relationship.
[0005]
With the miniaturization of the mobile phone as the set and the multi-functionalization such as
stereo distribution, the above-mentioned loudspeakers also require the miniaturization of the
loudspeaker and the freedom of layout. However, in order to miniaturize the mobile telephone
device and to realize stereo distribution, since the two units are acoustically coupled to one
substantially planar second diaphragm 10, the mobile telephone is miniaturized. However, since
two units are reproduced by a single substantially flat second diaphragm 10, a crosstalk is
generated in which sounds of two units are mixed. The As a result, the channel separation at the
time of stereo reproduction is deteriorated and the stereo feeling is reduced, which has been a
problem.
[0006]
It is an object of the present invention to provide an excellent speaker which can realize stereo
distribution and can be realized with high performance by improving channel separation and can
be miniaturized.
[0007]
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has
the following constitution.
[0008]
The invention according to claim 1 of the present invention is configured by acoustically
combining two or more first diaphragms and one second diaphragm with the enclosed space as a
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medium, and one second The diaphragm is divided into two parts via a flexible material.
With this configuration, it is possible to freely design the shape of the sealed space and to design
each diaphragm position and shape.
Therefore, the second diaphragm is divided into two via a flexible material while achieving
downsizing, thinning, and freedom of design of the mobile phone device even if a large
diaphragm is used. Channel separation can be improved at the time of stereo reproduction.
[0009]
In the invention according to claim 2 of the present invention, the first diaphragm is smaller than
the second diaphragm, and the first diaphragm is provided at the end of the second diaphragm
via the sealed space. It is what was constructed. As a result, the distance between the left and
right first diaphragms can be increased, and further improvement of channel separation at the
time of stereo reproduction can be realized.
[0010]
According to the third aspect of the present invention, the second diaphragm is formed of a
sheet-like transparent film. As a result, the display unit can be designed under the transparent
diaphragm, and the display unit can be seen through, so that downsizing of the mobile phone
device and further improvement of design freedom can be realized.
[0011]
According to a fourth aspect of the present invention, the area of the second diaphragm is larger
than the area of the first diaphragm. As a result, it is possible to realize the improvement of the
mountability and the freedom of design.
[0012]
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The invention according to claim 5 of the present invention is configured by arranging the
divided second diaphragm at substantially the same position in plan view via the first diaphragm
and the sealed space. Thereby, the vibration of the first diaphragm can be accurately transmitted
to the second diaphragm, and high fidelity reproduction can be realized.
[0013]
The invention according to claim 6 of the present invention is configured by arranging a
transparent material as a flexible material which divides the second diaphragm into two. As a
result, when the second diaphragm is made of a transparent film, even if the diaphragm is
divided into two by a material with high flexibility, there is nothing to shield visually, so under
the transparent diaphragm Even if the display is designed, it can be seen through the display
without visual obstacles.
[0014]
The invention according to claim 7 of the present invention is configured by arranging silicon as
a flexible material which divides the second diaphragm into two. As a result, it is possible to
realize high waterproofness and improved channel separation during stable stereo reproduction
over a wide temperature range.
[0015]
According to an eighth aspect of the present invention, the second diaphragm is divided into two
parts and rubber is disposed as a flexible material. As a result, it is possible to realize adjustment
of channel separation because it is possible to select a wide range of flexibility degrees of
freedom.
[0016]
The invention according to claim 9 of the present invention is configured by arranging an
elastomer as a flexible material which divides the second diaphragm into two. Thereby, high
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productivity and cost reduction can be realized.
[0017]
The invention according to claim 10 of the present invention is configured by arranging a foam
as a flexible material which divides the second diaphragm into two. As a result, a great
improvement in channel separation due to high internal loss can be realized.
[0018]
In the invention according to claim 11 of the present invention, the speaker according to any one
of claims 1 to 10 is provided adjacent to the display unit, and the front surface of the display unit
is covered with the second diaphragm of the speaker to cover the module. It is what was
constructed. Thus, the display unit and the speaker can be miniaturized and integrally
configured.
[0019]
According to a twelfth aspect of the present invention, an electronic device is configured by
including the module according to the eleventh aspect and an operation unit. Thus, the display
unit, the operation unit, and the speaker can be miniaturized and integrated.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings.
[0021]
(First Embodiment) The invention according to the first aspect of the present invention will be
described with reference to the first embodiment.
[0022]
FIG. 1 is a cross-sectional view of a loudspeaker according to an embodiment of the present
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invention.
[0023]
As shown in FIG. 1, the magnetized magnet 21 is sandwiched between the upper plate 22 and the
yoke 23 to form an internal magnetic circuit 24.
The frame 26 is coupled to the yoke 23 of the magnetic circuit 24.
A first diaphragm 27 is bonded to the peripheral portion of the frame 26, and the voice coil 28 is
coupled to the first diaphragm 27 and coupled so as to fit in the magnetic gap 25 of the magnetic
circuit 24. Configured.
Furthermore, a panel 29 is coupled to the peripheral portion of the frame 26 for two units
described above, and a substantially planar second diaphragm 30 is bonded to the panel 29. The
second diaphragm 30 is divided into two at a substantially central portion via a highly flexible
material 33.
[0024]
The first diaphragm 27 and the second diaphragm 30 are acoustically coupled to each other by
the sealed space 31.
[0025]
With this configuration, channel separation improvement at the time of stereo reproduction can
be realized by being divided into two via the flexible material 33.
Also, by freely designing the shape of the sealed space 31 and designing the position and shape
of each diaphragm, the mobile phone device can be miniaturized, made thinner, and the degree
of freedom of design improved even if a large diaphragm is used. It can be realized.
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[0026]
Here, 32 in the enclosed space 31 is a sound path portion for connecting the first diaphragm 27
and the second diaphragm 30 and setting their positional relationship.
[0027]
Second Embodiment The second embodiment of the present invention will be described below
with reference to the second aspect of the present invention.
FIG. 2 shows a cross-sectional view of a loudspeaker according to an embodiment of the present
invention. The second embodiment differs from the first embodiment in that the two first
diaphragms 27 are smaller than the second diaphragm 30, and the two first diaphragms 27 and
the sound path portion 32 thereof are enclosed in a sealed space 31. The outer peripheral
portion of the frame 26 provided at each end of the second diaphragm 30 via the first diaphragm
27 is coupled to the end of the panel 29 on which the second diaphragm 30 is supported. The
sound path section 32 is connected to a part thereof. Thus, the distance between the left and
right first diaphragms 27 can be increased, so that crosstalk between the left and right channels
can be reduced, and further improvement of channel separation at the time of stereo
reproduction can be realized. The second diaphragm 30 is separated to the left and right as
shown in FIG.
[0028]
Third Preferred Embodiment The third preferred embodiment according to the present invention
will be described below with reference to the third preferred embodiment. The second
embodiment differs from the first embodiment in FIG. 1 in that the second diaphragm 30 is
formed of a sheet-like transparent film. Thus, by designing using the lower space of the sheet-like
transparent film, the lower one of the transparent film can be seen through. With this
configuration, the arrangement of parts can be arranged while effectively utilizing not only the
lateral direction but also the height direction. Therefore, even if the large second diaphragm 30 is
used, it is possible to realize further downsizing of the mobile phone device and improvement in
the degree of freedom in design.
[0029]
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Fourth Embodiment The fourth embodiment of the present invention will be described with
reference to the fourth aspect of the present invention. This is to set the area of the second
diaphragm 30 larger than the area of the first diaphragm 27 as shown in FIG. 1, and a portion of
the outer surface of the set having a large surface area can be used as the second diaphragm 30.
, Efficient implementation, design can be realized.
[0030]
Fifth Embodiment The fifth embodiment of the present invention will be described with reference
to the fifth embodiment of the present invention. FIG. 3 shows a cross-sectional view of a
loudspeaker according to an embodiment of the present invention.
[0031]
In the configuration shown in FIG. 3, the second diaphragms 30 divided into right and left as
shown in FIG. 2B are disposed corresponding to the corresponding first diaphragms 27 via the
enclosed space. . Thereby, the vibration of the first diaphragm 27 can be accurately transmitted
to the left and right portions of the second diaphragm 30 respectively corresponding to each
other, unnecessary resonance of the second diaphragm 30 is reduced, and distortion is reduced.
And high fidelity reproduction can be realized.
[0032]
Sixth Embodiment The sixth embodiment of the present invention will be used to explain the
sixth aspect of the present invention. This is configured by arranging a transparent material as a
flexible material 33 for dividing the second diaphragm 30 into two. Thereby, even when the
second diaphragm 30 is made of a transparent film, there is nothing to shield visually, so even if
the display unit is designed under the second diaphragm 30, visual obstacle It can be seen
through without it.
[0033]
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Seventh Embodiment The seventh embodiment of the present invention will be used to explain
the seventh to tenth aspects of the present invention. The second embodiment differs from the
first embodiment in that silicon, rubber, an elastomer, and a foam are arranged as the flexible
material 33 for dividing the second diaphragm 30 of FIG. 1 into two. At this time, in the case of
silicon, it is possible to realize high waterproofness and improved channel separation at the time
of stable stereo reproduction over a wide temperature range. In the case of rubber, it is possible
to realize adjustment of channel separation since the flexibility can be selected in a wide range. In
the case of an elastomer, high productivity and cost reduction can be realized. In the case of
foam, a great improvement in channel separation due to high internal losses can be realized.
[0034]
As described above, by selectively using the flexible material 33 that divides the second
diaphragm 30 into two, various effects can be obtained according to the characteristics.
[0035]
Eighth Embodiment The eighth embodiment of the present invention will be used to explain the
invention set forth in the eleventh aspect of the present invention.
FIG. 4 is a partial cross-sectional view for explaining the mounting state of a part of the mobile
telephone device equipped with the speaker according to the embodiment of the present
invention.
[0036]
FIG. 4 shows a module 50 including at least a display unit 41 and a speaker 40, and covers the
second diaphragm 30 according to any of claims 1 to 10 on the front surface of the display unit
41 and the display unit 41. It is the module 50 arrange ¦ positioned and mounted ¦ worn with the
shape. At this time, the second diaphragm 30 is made of a transparent film sheet, and is divided
into two through the flexible material 33. As described above, by setting the display section 41 in
the lower space of the sheet-like transparent film and modularizing it, the lower one of the
transparent film can be seen through. With this configuration, channel separation can be
improved at the time of stereo reproduction. In addition, even with the use of the large second
diaphragm 30, it is possible to realize further downsizing of the mobile phone device and
improvement in the degree of freedom in design.
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[0037]
Furthermore, by modularizing in this way, it is possible to achieve process reduction at the time
of set production and rationalization at the component distribution stage, and cost reduction can
be realized.
[0038]
(Embodiment 9) The invention according to the twelfth aspect of the present invention will be
described below with reference to the ninth embodiment.
FIG. 5 is a partial cross-sectional view for explaining a mounting state of a part of a mobile
telephone device equipped with a module according to an embodiment of the present invention.
[0039]
FIG. 5 shows a portable telephone apparatus 51 composed of at least a display unit 41, an
operation unit 42 and a speaker 40. The portable telephone apparatus 51 is configured using the
module 50 described in the eighth embodiment, the module 50 is coupled to the exterior case
52, the operation unit 42 is coupled to the side thereof, and the main part is configured. It is
done. At this time, the second diaphragm 30 is made of a transparent film sheet. As a result, the
display unit 41 is set in the lower space of the sheet-like transparent film, and the operation unit
42 is set to the side of the display unit 41 to reduce the size and thickness of the mobile
telephone device 51 and improve design freedom. Can be realized.
[0040]
With this configuration, channel separation can be improved at the time of stereo reproduction.
Here, with regard to the arrangement of the module 50 with respect to the exterior case 52 of
the mobile telephone device 51, it is possible to set either in the vertical direction or in the
horizontal direction in accordance with the function or design.
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[0041]
In addition, it is possible to set both the display unit 41 and the operation unit 42 in the lower
space of the sheet-like transparent film, and further downsizing of the mobile phone device 51
and improvement in freedom of design can be realized. .
[0042]
Furthermore, with this configuration, the second diaphragm 30 can also share the receiver that
has been conventionally installed alone.
For this reason, the sound hole for receivers conventionally required can be eliminated, and
waterproofness and drip resistance can be dramatically improved. In addition, it is possible to
realize a wide service area by the large second diaphragm 30.
[0043]
This set can be widely applied not only to mobile phones but also to electronic devices such as
communication devices, game devices, liquid crystal televisions, personal computers, and
navigation devices.
[0044]
As described above, according to the present invention, it is possible to use two or more first
diaphragms and a second diaphragm divided into two via a flexible material as sound in the
sealed space. It is composed by combining.
As a result, by freely designing the position and shape of each diaphragm, and further, the
module using the same and the electronic devices thereof, the mobile phone device can be
miniaturized even if the large second diaphragm is used. , Can improve the freedom of design. In
addition, channel separation can be improved at the time of stereo reproduction.
[0045]
As described above, the present invention can provide an excellent speaker capable of realizing
downsizing of the speaker and the mobile telephone device and high-performance stereo
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distribution, and the industrial value thereof is extremely large.
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