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JP2005354442

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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
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DESCRIPTION JP2005354442
The present invention relates to a speaker used in an information communication apparatus and
the like, which solves the problem that there is no mounting space due to the reduction in size
and thickness, and enables a compact, thin, high-performance speaker whose external shape can
be freely set corresponding to a limited space. The purpose is to provide a speaker. A frame is
formed by coupling a magnetic circuit provided with a magnetic gap, and a diaphragm is coupled
to a voice coil disposed close to the top of the magnetic circuit in a non-contact manner and the
outer periphery is coupled to the frame periphery And the outer periphery of the diaphragm is
formed in a shape corresponding to the gap for mounting the speaker, which is permitted by the
mounted device, the outer shape is freely set corresponding to the limited space, and the
vibration of this unspecified shape It is possible to greatly improve the degree of freedom in
mounting the speaker while maintaining the characteristics of small size and high performance
by uniformly oscillating the plate. [Selected figure] Figure 1
Electro-acoustic transducer, module using the same, electronic device and device
[0001]
The present invention relates to an electro-acoustic transducer used for various audio devices,
video devices, and information communication devices, and in particular, the outer shape
corresponding to a mounting space which is effective when the size is reduced and the mounting
space is restricted. The present invention relates to an electroacoustic transducer whose shape
can be set arbitrarily.
[0002]
Further, the present invention relates to a module equipped with this electroacoustic transducer,
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and an electronic apparatus and device such as a mobile phone.
[0003]
FIG. 15 is a cross-sectional view showing the configuration of a conventional speaker.
[0004]
As shown in FIG. 15, 1 is a magnet, and 2 and 3 are an upper plate and a yoke joined so as to
sandwich the magnet 1 from the upper and lower sides, thereby forming an annular magnetic
gap 5 It is what constitutes a circuit.
[0005]
6 is a frame coupled to the magnetic circuit at the center, 8 is a voice coil movably fitted in the
magnetic gap 5, 7 is coupled to the voice coil 8 at the center and the outer peripheral portion is
on the periphery of the frame 6 It is a combined diaphragm.
[0006]
In the conventional speaker configured as described above, the voice coil 8 drives the inside of
the magnetic gap 5 up and down by inputting an electric signal to the voice coil 8, whereby the
diaphragm 7 coupled to the voice coil 8 is produced. Is configured to perform acoustic
reproduction with amplitude.
[0007]
As prior art document information related to the invention of this application, for example,
Patent Document 1 and Patent Document 2 are known.
JP, 2002-78082, A JP, 2004-56278, A
[0008]
However, in the above-mentioned conventional electroacoustic transducer, the space for
attaching a speaker becomes extremely small when it is mounted on a product which is rapidly
becoming smaller, thinner and more multifunctional, and hence the electroacoustic transducer is
miniaturized. There was a problem that it could not follow.
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[0009]
In particular, in mobile phones, in addition to efforts to reduce the size and thickness,
multifunctionalization has progressed at a significantly faster speed than expected, and as a
result, a large number of new parts that have never been available will be loaded. In the extreme
case, there is also a problem that there is no space for mounting the electroacoustic transducer.
[0010]
Therefore, in such a situation, the external shape of the electroacoustic transducer has a certain
regularity as represented by a circle, an oval, an ellipse, a square, a regular polygon, etc. as in the
prior art. In the case of the electroacoustic transducer of the shape, it had the big problem that it
could not be installed at the bottom of the space ¦ gap part for electroacoustic transducer
mounting ¦ wearing accept ¦ permitted by a mobile telephone.
[0011]
The present invention solves such conventional problems and provides a small-sized, thin, highperformance electro-acoustic transducer that can freely set its external shape corresponding to a
limited mounting space. It is the purpose.
[0012]
In order to solve the above problems, the present invention comprises at least one of a magnetic
circuit provided with a magnetic gap, a frame coupled to the magnetic circuit, and a voice coil
disposed close to the magnetic circuit without contact with the magnetic circuit. An
electroacoustic transducer comprising a diaphragm coupled to the surface of the frame and
having an outer peripheral portion coupled to a peripheral edge of the frame, wherein the frame
and the outer peripheral portion of the diaphragm are attached for the electroacoustic
transducer permitted in the mounting equipment Is formed in a shape having no regularity.
[0013]
As described above, the electro-acoustic transducer according to the present invention can freely
set the outer shape corresponding to the limited mounting space for mounting the electroacoustic transducer, and this constant rule Even in the case of non-specifically shaped
diaphragms that do not have rigidity, uniform amplitude can be achieved, which makes it
possible to greatly improve the degree of freedom of speaker installation on a device to be
mounted while maintaining the characteristics of small size and high performance. The special
effect is obtained.
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[0014]
First Embodiment The first, second, third, third, sixth, and fifteenth aspects of the present
invention will be described with reference to the first embodiment.
[0015]
FIG. 1 is a plan view showing the configuration of a speaker that is one of the electroacoustic
transducers according to Embodiment 1 of the present invention, FIG. 2 is a sectional view taken
along the line AA 'of the same speaker, and FIG. 3 is a diaphragm of the same speaker. And FIG. 4
is a cross-sectional view of the same magnetic circuit taken along the line B-B '.
[0016]
Since the configuration of this speaker corresponds to the mounting space of the electronic
device such as the mobile phone shown in FIG. 13 for allowing the mounting of the permitted
electro-acoustic transducer, the external shape of the speaker has no regularity. It is formed and
formed in the following shape.
[0017]
Here, FIG. 13 is a perspective view showing a mobile phone equipped with the speaker according
to the present embodiment.
[0018]
That is, a shape having a regularity such as a circle, an oval, an oval, a square, a regular polygon
or the like has no mounting space, or if it is set to a shape having these regularities, only a very
small area Since it can not be realized, it has a shape corresponding to the permitted mounting
space.
[0019]
Therefore, the present embodiment shows an example, and the present invention is not limited to
this shape, and the shape thereof may be any shape as long as the outer shape has no regularity.
It may be a shape.
[0020]
Desirably, it should be a shape that can realize as large an area as possible in the permitted
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mounting space of the electronic device.
[0021]
In addition, although the present embodiment describes a speaker that is one of the
electroacoustic transducers, the present invention is not limited to this, and any electroacoustic
transducer such as a receiver, a sounder, and a microphone may be used. It is applicable.
[0022]
1 to 4, 21 is a magnet, 22 is a top plate, 23 is a yoke, 24 is a magnetic circuit, 25 is a magnetic
gap, 26 is a frame, 27 is a diaphragm, and 28 is a voice coil.
[0023]
Here, the principle of operation of the speaker will be described. A voice coupled to the
diaphragm 27 of the above-described outer shape, which is disposed in proximity to the above in
a non-contact state by leaking the magnetic flux generated in the magnetic circuit 24 from the
magnetic gap 25 The coil 28 is operated.
[0024]
When an input signal is input to the voice coil 28, the diaphragm 27 vibrates in the vertical
direction in response to the input signal to generate a sound.
[0025]
Here, this voice coil 28 can secure its function as long as it is wound at least one layer, but by
winding it in multiple layers in two or more layers, the driving force is increased and the sound
pressure of the speaker is increased. You can improve the level.
[0026]
The voice coil 28 coupled to the diaphragm 27 is also provided on the magnetic circuit 24 side,
that is, on the back surface side of the diaphragm 27 as in this embodiment, but the surface side
of the diaphragm 27 or further You may provide in both surfaces of front and back.
[0027]
Here, the diaphragm 27 is made of resin.
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[0028]
With this configuration, a lightweight and inexpensive diaphragm can be realized, the sound
pressure level of the speaker can be improved, and the cost of the speaker can be reduced.
[0029]
Further, as shown in FIG. 2, the outer dimensions of the frame 26 and the outer dimensions of
the diaphragm 27 are substantially the same.
[0030]
With this configuration, the external dimensions of the diaphragm 27 can be maximized, that is,
the area of the diaphragm 27 can be maximized, and the efficiency is improved, such as the
improvement of the sound pressure level of the speaker. be able to.
[0031]
Further, the voice coil 28 coupled to the diaphragm 27 is configured to be provided in a wound
state on the diaphragm 27 surface including a portion wound at least along a part of the outer
peripheral portion of the diaphragm 27 There is.
[0032]
With this configuration, since the voice coil 28 exists at least at a part of the outer peripheral
portion of the diaphragm 27, even if the diaphragm is of a non-specific shape having no
regularity, it is possible to make uniform amplitude. Become.
[0033]
Further, the shape of the magnetic gap of the speaker is made to be substantially similar to the
shape of the outer peripheral portion of the diaphragm, that is, it is configured to match the
shape of the outer peripheral portion of the frame.
[0034]
With this configuration, by making the shape of the magnetic gap conform to the shape of the
outer peripheral portion of the frame, the diaphragm can be uniformly and efficiently oscillated
even when using a diaphragm of a non-specific shape, which is unnecessary The occurrence of
resonance can be reduced.
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[0035]
Therefore, the performance of the speaker can be improved, for example, the frequency
characteristics can be improved.
[0036]
Thus, the speaker according to the present embodiment, as represented by a mobile phone or the
like, has a free external shape corresponding to the limited space even when the space for
mounting the speaker is extremely limited. It is possible to set to a constant frequency, and even
with a diaphragm of a non-specific shape that does not have this regularity, it is possible to make
the uniform amplitude, so that the compact and high performance characteristics are maintained
while being mounted It is possible to obtain the special effect that it is possible to greatly
improve the degree of freedom of the speaker attachment to the device.
[0037]
Second Embodiment The invention according to the fourth and fifth aspects of the present
invention will be described below with reference to a second embodiment.
[0038]
In the present embodiment, the magnetic circuit 24 is disposed to face the upper and lower sides
of the diaphragm 27 via the diaphragm 27 of the speaker described in the first embodiment, and
the diaphragm 27 is also configured for the voice coil 28. Bonded to the front and back of the
[0039]
Since the configuration other than the above is the same as that of the first embodiment, the
same reference numerals are given to the same parts and the detailed description thereof is
omitted, and only different parts will be described below with reference to the drawings.
[0040]
FIG. 5 is a plan view showing the configuration of a diaphragm 27 according to a second
embodiment of the present invention, and FIG. 6 is a cross-sectional view of the diaphragm 27.
[0041]
FIG. 7 is a plan view showing the configuration of the loudspeaker according to Embodiment 2 of
the present invention, and FIG. 8 is a cross-sectional view of the loudspeaker.
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[0042]
In FIGS. 5-8, 23A is a sound output hole of a yoke.
[0043]
As shown in FIG. 5 and FIG. 6, the diaphragm 27 of this embodiment couples the voice coil 28 to
the front and back of the diaphragm 27 in order to improve the sound pressure level particularly
as a speaker, and further, it is multilayer It is supposed to be wound.
[0044]
As shown in FIGS. 7 and 8, the magnetic circuit 24 is disposed to be opposed to the upper and
lower sides of the diaphragm 27.
[0045]
In this case, the same specifications as those of the magnetic circuit 24 described in the first
embodiment may be vertically disposed, or the magnetic circuit 24 may not be disposed entirely
on the upper side, and only necessary portions may be provided. You may arrange it.
[0046]
Furthermore, by providing the sound output hole 23A of the yoke in the yoke 23 of the magnetic
circuit 24 on the upper side, the sound output efficiency can be improved, and the sound
pressure level of the speaker can be further improved.
[0047]
As described above, in the loudspeaker according to the present embodiment, the magnetic
circuit 24 is arranged symmetrically with the diaphragm 27 interposed therebetween, so that the
sound pressure level of the loudspeaker can be further improved, and the miniaturization and
high performance can be realized. It has a special effect of being able to
[0048]
Third Embodiment The third to tenth aspects of the present invention will be particularly
described with reference to the third embodiment.
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[0049]
The present embodiment has a configuration in which two or more different voice coils are
coupled to the diaphragm of the speaker described in the first embodiment, and the other
configuration is the same as that of the first embodiment. The same reference numerals are given
to the same parts, the detailed description thereof is omitted, and only different parts will be
described below with reference to the drawings.
[0050]
FIG. 9 is a plan view showing the configuration of a diaphragm according to a third embodiment
of the present invention.
[0051]
In FIG. 9, 27 is a diaphragm, 28A is a first voice coil, and 28B is another second voice coil.
[0052]
This configuration shows the configuration of the diaphragm in the case where the speakers are
stereo compatible, and by providing two voice coils on one diaphragm 27, the stereo compatible
speaker can be easily realized.
[0053]
Also, without being limited to this embodiment, it is possible to realize multi-waying by providing
several types of voice coils with different areas and inputting signals of different frequency bands
to each of them. is there.
[0054]
Furthermore, as shown in FIG. 11 which is a plan view of the speaker shown in FIG. 10 and a
cross-sectional view taken along the line E-E 'of FIG. 10 so as to correspond to each voice coil
when implementing stereo correspondence or multiway. It is also possible to improve channel
separation by making the diaphragms have a discontinuous structure as in 27A and 27B.
[0055]
Thus, by making the diaphragm into a discontinuous structure, crosstalk can be reduced and
channel separation can be improved without the vibrations of different channels affecting each
other.
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[0056]
Then, by providing magnetic circuits respectively corresponding to two or more different types
of voice coils coupled to the diaphragm, each voice coil and the diaphragm can be driven more
finely and more accurately, and the speaker performance It can improve.
[0057]
As described above, the loudspeaker according to the present embodiment has an exceptional
effect that various acoustic reproductions can be performed with one loudspeaker by having a
configuration in which two or more different voice coils are coupled to the diaphragm. It is.
[0058]
Fourth Embodiment The fourth embodiment of the present invention will be described below in
particular for the inventions described in claims 11 to 13 of the present invention.
[0059]
The present embodiment differs from the first embodiment in the configuration of the voice coil
coupled to the diaphragm of the speaker described above, and the other configuration is the
same as that of the first embodiment, and therefore, the detailed description will be given. Is
omitted.
[0060]
The configuration of the voice coil described in the first embodiment is a metal material
produced through an etching process and a plating process, but the present embodiment is as
follows.
[0061]
The voice coil according to claim 11 is constituted by a metal wire having an insulating film, and
the voice coil is constituted by a magnet wire which is a general-purpose product which is often
used for a general electroacoustic transducer. It is.
[0062]
With this configuration, the productivity and cost of the voice coil can be improved, and the
productivity and cost of the speaker can be improved.
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[0063]
The magnet wire generally has a circular cross-sectional shape, but by making it a square shape,
that is, a rectangular wire, the space factor can be improved and the sound pressure level of the
speaker can be improved. be able to.
[0064]
The voice coil according to claim 12 is made of metal foil.
[0065]
With this configuration, the voice coil can be made thinner and lighter while improving the
accuracy and setting freedom of the voice coil shape, and the performance and thickness of the
speaker can be further improved, and the sound pressure level can be further improved. it can.
[0066]
The voice coil according to claim 13 is made of conductive ink.
[0067]
With this configuration, it is possible to simultaneously achieve productivity, thinning, and
weight reduction of the voice coil while improving the accuracy and setting freedom of the voice
coil shape, and to improve the performance of the speaker, productivity, thinning, and sound
pressure level. The performance improvement effect is large.
[0068]
As described above, in the speaker according to the present embodiment, the voice coil can be
precisely formed on the diaphragm of a non-specific shape by forming the voice coil with metal
foil or conductive ink.
[0069]
Fifth Embodiment The fifth embodiment of the present invention will be described below with
reference to FIG.
[0070]
The present embodiment has a configuration in which the coupling between the peripheral edge
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of the diaphragm of the speaker described in the first embodiment and the frame is different.
[0071]
In the first embodiment, it is general to use metal or resin as the material of the frame 26.
However, in the present embodiment, it is carried out through the material having flexibility.
[0072]
Alternatively, a flexible material, that is, a cushion material may be disposed and coupled to the
frame 26, and the diaphragm 27 may be further coupled, or the frame 26 may be formed of a
flexible material. be able to.
[0073]
As materials having flexibility, resin-based or rubber-based materials such as silicone rubber and
foamed rubber, and further urethane foam are often used.
[0074]
As described above, the speaker according to the present embodiment has a structure capable of
more efficiently performing the amplitude of diaphragm 27 by disposing a cushion material on
the outer peripheral portion of diaphragm 27 or providing an edge. be able to.
[0075]
Therefore, the special effect that a high-performance speaker can be provided is produced.
[0076]
Sixth Embodiment The invention according to the sixteenth aspect of the present invention will
be described below with reference to the sixth embodiment.
[0077]
FIG. 12 is a cross-sectional view of a speaker module according to an embodiment of the present
invention.
[0078]
As shown in FIG. 12, the speaker 30 described in any one of claims 1 to 15 and the electronic
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circuit 40 are integrated to constitute a speaker module 50.
[0079]
Here, as a configuration of the speaker module 50, the electronic component 42 is fixed to the
circuit board 41 and wired to configure the electronic circuit 40.
The electronic circuit 40 and the speaker 30 according to any one of claims 1 to 15 are
integrally coupled to constitute a speaker module 50.
[0080]
The electronic circuit 40 includes at least an amplifier circuit of an audio signal supplied to the
speaker.
That is, since the circuit for amplifying the signal-processed audio signal to a level necessary for
outputting from the speaker is already integrated with the speaker and the internal wiring is also
provided, the speaker module is combined. You can easily get an audio output just by.
[0081]
Furthermore, in the electronic circuit 40, in addition to the above-mentioned amplifier circuit, if it
is a communication device such as a mobile phone, it is necessary for a circuit necessary for
communication such as a detection circuit, a modulation circuit, a demodulation circuit In
addition, various circuits such as a power supply circuit and a charging circuit can be included.
[0082]
With this configuration, the speaker and the electronic circuit, which are conventionally
manufactured separately, are supplied to the production base of the electronic device such as the
mobile phone through each inspection step and the physical distribution step, are integrated and
modularized. As a result, the production process, the inspection process, and the distribution
process can be integrated, and a great deal of cost reduction can be implemented.
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[0083]
Therefore, the speaker module 50 in which the speaker 30 and the electronic circuit 40 are
combined can be provided at low cost.
[0084]
Seventh Embodiment Hereinafter, the seventh embodiment of the present invention will be
described.
[0085]
FIG. 13 is a perspective view of a mobile phone which is an electronic device according to an
embodiment of the present invention.
[0086]
As shown in FIG. 13, a mobile phone 80 is configured by mounting any one of the speakers 30
according to any one of claims 1 to 15.
[0087]
Here, as the configuration of the mobile phone 80, the speaker 30, the display module 60 such
as liquid crystal, the operation unit 65, the microphone 66, the camera 67, the receiver 68, etc. A
mobile phone 80 is configured with a circuit.
[0088]
With this configuration, even if there is only a very limited space for mounting the speaker, a
speaker having a diaphragm of a non-specific shape that can freely set the external shape
corresponding to the limited space is mounted. By doing this, it is possible to obtain the special
effect that it is possible to miniaturize an electronic device such as a mobile phone while
maintaining high performance characteristics.
[0089]
Eighth Embodiment The eighth embodiment of the present invention will be described in the
following.
[0090]
FIG. 14 shows a cross-sectional view of an automobile 90 which is an apparatus according to an
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embodiment of the present invention.
[0091]
As shown in FIG. 14, the speaker 30 of the present invention is incorporated in a rear tray or a
front panel and used as a part of a car navigation system or a car audio system to constitute an
automobile 90.
[0092]
With this configuration, even in an automobile where there is only a very limited space for
mounting the speaker, it has a diaphragm of a non-specific shape that can freely set the external
shape corresponding to the limited space. By mounting the speaker, it is possible to obtain a
special effect that it is possible to miniaturize a device such as an automobile while maintaining
high performance characteristics.
[0093]
The speaker according to the present invention can freely set the outer shape corresponding to
the limited mounting space for mounting the speaker, and has a diaphragm of a non-specific
shape which does not have this regularity. However, since it is possible to make the amplitude
uniform, it is possible to greatly improve the degree of freedom in attaching the electroacoustic
transducer to the mounted device while maintaining the characteristics of small size and high
performance.
[0094]
Therefore, it is useful for electroacoustic transducers and electronic devices centering on
information communication devices, such as mobile phones, which are pursued to be smaller,
thinner and multifunctional.
[0095]
The top view which showed the structure of the speaker by one embodiment of this invention
The sectional view of the speaker The top view except the diaphragm of the speaker The
sectional view of the same magnetic circuit The voice coil by one embodiment of this invention is
combined The cross sectional view of the diaphragm to which the voice coil was combined. The
top view which showed the structure of the speaker by one embodiment of this invention The
sectional view of the same speaker One embodiment of this invention The top view which
showed the structure of the diaphragm with which the voice coil by this was couple ¦ bonded The
top view which showed the structure of the speaker by one embodiment of this invention It is
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sectional drawing which showed the structure of the same diaphragm by one embodiment of this
invention Cross-sectional view of speaker module Perspective view of mobile phone according to
one embodiment of the present invention Cross-sectional view of automobile according to one
embodiment of the present invention Cross-sectional view showing the configuration of a
conventional speaker
Explanation of sign
[0096]
Reference Signs List 21 magnet 22 upper plate 23 yoke 23A yoke sound emitting hole 24
magnetic circuit 25 magnetic gap 26 frame 27 diaphragm 27A diaphragm 27B diaphragm 28
voice coil 28A voice coil 28B voice coil 30 speaker 40 electronic circuit 41 circuit board 42
electronic component 50 Speaker module 60 Display module 65 Operation part 66 Microphone
67 Camera 68 Receiver 70 Exterior case 80 Mobile phone 90 Automobile
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