close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JP2005184588

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
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 JP2005184588
The present invention relates to a speaker and an electronic device used for an audio device, and
it is an object of the present invention to make the speaker and the electronic device thinner.
According to the present invention, the outer shape is a shape other than a circle and is made of
a sheet material, and one sheet covers the inner peripheral side and the outer peripheral side of
the voice coil, and the sectional shape of the inner peripheral side of the voice coil is substantially
By forming a speaker using a diaphragm having a dome shape and having a recess formed in a
part of the substantially dome shape, the speaker can be made thin by reducing unnecessary
resonance and thinning the entire height of the diaphragm. In the configuration, it is possible to
realize [Selected figure] Figure 1
Speaker and electronic device using the same
[0001]
The present invention relates to a speaker and an electronic device used for various audio
devices and information communication devices.
[0002]
The prior art will be described with reference to FIG.
[0003]
FIG. 6 is a cross-sectional view of a conventional speaker.
12-04-2019
1
[0004]
As shown in FIG. 6, the magnetized magnet 1 is sandwiched between the upper plate 2 and the
yoke 3 to form an internal magnetic circuit 4.
The frame 6 is coupled to the yoke 3 of the magnetic circuit 4.
[0005]
A diaphragm 7 made of a resin film is coupled to the peripheral portion of the frame 6, and a
voice coil 8 having a circular planar shape is coupled to the diaphragm 7 and is fitted into the
magnetic gap 5 of the magnetic circuit 4. It's bound so.
[0006]
Here, the external shape of the diaphragm 7 is formed in an elliptical shape so as to be able to be
downsized even if it is arranged on the side surface portion of the image display means such as a
mobile phone.
[0007]
Further, the cross-sectional shape of the diaphragm 7 on the inner peripheral side of the joint
portion with the voice coil 8 is formed in a substantially dome shape.
[0008]
As prior art document information related to the invention of this application, for example,
Patent Document 1 is known.
Unexamined-Japanese-Patent No. 2003-235097
[0009]
As the above-mentioned speakers are strongly demanded by the market from thinner and smaller
electronic devices such as mobile phones that are the set, the thickness and size of the speakers
used in these sets are also strong It is requested.
12-04-2019
2
[0010]
In particular, in a portable telephone capable of stereo distribution, speakers must be arranged
on both sides of an image display means such as liquid crystal, and the occupied area of the
speaker is twice as large as that of the conventional monaural system.
[0011]
Furthermore, as for the signal processing and the audio amplification means, the occupied area
of the circuit becomes larger for a portable telephone capable of stereo reception, compared to
the conventional monaural system.
[0012]
For the above reasons, the market has strongly demanded that the speaker be thinner and
smaller.
[0013]
Therefore, for downsizing, speakers with a circular diaphragm outer shape have been the
mainstream in the past, but recently, a large number of so-called slim speakers with an oval
shape, a track shape and a rectangular shape with a major diameter and a minor diameter are
developed It has become.
[0014]
Then, attempts have been made to realize downsizing and downsizing by arranging these slim
speakers in the vertical direction on both side surfaces of the image display means such as liquid
crystal.
[0015]
That is, by devising the arrangement in the plane direction of the component parts, it is aimed to
miniaturize and downsize the portable telephone capable of stereo reception, which is increasing
in size.
[0016]
As described above, although measures to reduce the size and size have been promoted,
measures to reduce the thickness have become an issue.
12-04-2019
3
[0017]
With regard to the reduction in thickness, although the arrangement is devised without
overlapping the component parts of the mobile phone as much as possible, the reduction in
thickness becomes absolutely difficult in recent years where a folding type mobile phone is
becoming mainstream.
[0018]
Therefore, in order to reduce the thickness of electronic devices such as mobile phones, it is
essential to reduce the thickness of the speakers.
[0019]
Therefore, if the height of the diaphragm is designed to be thin in order to reduce the thickness
of the speaker, the shape rigidity of the diaphragm is reduced, unnecessary resonance occurs,
and the problem of the sound pressure frequency characteristic is disturbed. It was something I
had.
[0020]
However, for these slim speakers, the external shape of the diaphragm is a shape other than a
circle, and in many cases the voice coil is circular, so the resonance from this voice coil to the
external shape of the diaphragm is It has a shape that is unlikely to occur.
[0021]
This is because the outer shape of the diaphragm is a shape other than a circle, and when it is
driven by a circular voice coil, the distance to the diaphragm outer portion by each angle from
the planar circular voice coil of the diaphragm is Since each angle is different, resonance is
dispersed and energy is not concentrated on a constant frequency component.
[0022]
Compared with this, with regard to the resonance on the inner peripheral side of the circular
voice coil, that is, from the voice coil to the inner periphery of the diaphragm, the shape is
circular, and the curvature of the dome shape of the cross section is changed to achieve thinning.
Therefore, there is a problem that the shape rigidity is reduced and unnecessary resonance
occurs frequently.
12-04-2019
4
[0023]
And since it is comprised from the resin film sheet of a diaphragm, it is in the tendency for an
internal loss to be small and for this to generate resonance notably.
[0024]
An object of the present invention is to solve the above-mentioned problems and to provide an
excellent speaker capable of reducing unnecessary resonance of a diaphragm and achieving
thinning.
[0025]
In order to achieve the above object, the present invention has the following configuration.
[0026]
The invention according to claim 1 of the present invention is a frame coupled to a magnetic
circuit, and an outer peripheral portion of the frame, the outer shape of which is a shape other
than a circle, and is made of sheet material. The speaker is configured of a diaphragm that covers
the inner and outer circumferential sides of the coil, and a voice coil that is coupled to the
diaphragm and a part of which is disposed in the magnetic gap of the magnetic circuit.
[0027]
The cross-sectional shape of the inner periphery of the voice coil of the diaphragm of the speaker
has a substantially dome shape, and a recess is formed in a part of the substantially dome shape.
[0028]
With this configuration, by forming the depressions in the diaphragm, the overall height of the
diaphragm can be reduced, the shape rigidity can be enhanced, and unnecessary resonance can
be reduced. Thus, the thickness reduction of the speaker and the sound pressure frequency
characteristics can be achieved. Stabilization can be realized.
[0029]
According to a second aspect of the present invention, the outer shape of the diaphragm is
formed in an elliptical shape.
12-04-2019
5
[0030]
With this configuration, it is possible to realize thinning of the elliptical slim speaker
advantageous for miniaturization and stabilization of the sound pressure frequency
characteristic.
[0031]
According to the third aspect of the present invention, the outer shape of the diaphragm is
formed in a track shape.
[0032]
With this configuration, it is possible to realize thinning of the track-shaped slim speaker which is
advantageous for downsizing and stabilization of the sound pressure frequency characteristic.
[0033]
According to a fourth aspect of the present invention, the outer shape of the diaphragm is
formed in a rectangular shape.
[0034]
With this configuration, it is possible to realize thinning of the rectangular slim speaker which is
advantageous for downsizing, and stabilization of the sound pressure frequency characteristic.
[0035]
According to a fifth aspect of the present invention, an electronic device is configured by
mounting any one of the speakers according to the first to fourth aspects.
[0036]
This configuration can make the electronic device thinner and smaller.
[0037]
As described above, according to the present invention, the outer shape is a shape other than a
circle and is made of a sheet material, and one sheet covers the inner peripheral side and the
outer peripheral side of the voice coil, and the cross sectional shape of the voice coil on the inner
peripheral side is substantially The speaker is configured by using a diaphragm having a dome
shape, and having a recess formed in a part of the substantially dome shape.
12-04-2019
6
[0038]
With this configuration, by forming the depression in the diaphragm, the overall height of the
diaphragm can be reduced, the shape rigidity can be enhanced, and unnecessary resonance can
be reduced, and the sound pressure frequency characteristics of the speaker can be stabilized.
And thinning can be realized.
[0039]
Hereinafter, embodiments of the present invention will be described using the drawings.
[0040]
First Embodiment The first and second embodiments of the present invention will be described
below with reference to the first embodiment.
[0041]
FIG. 1 is a cross-sectional view of a loudspeaker according to an embodiment of the present
invention.
[0042]
Moreover, FIG. 2 shows the top view.
[0043]
As shown in FIG. 1 and FIG. 2, the magnet 21 magnetized is sandwiched by the upper plate 22
and the yoke 23 to constitute an internal magnetic type magnetic circuit 24.
[0044]
An elliptical frame 26 is coupled to the yoke 23 of the magnetic circuit 24.
The outer periphery of an elliptical diaphragm 27 made of a sheet material and covering the
inner peripheral side and the outer peripheral side of the voice coil 28 with one sheet is bonded
to the peripheral edge portion of the oval shaped frame 26.
12-04-2019
7
[0045]
Then, one end of the voice coil 28 is coupled to the elliptical diaphragm 27, and the other end is
coupled to be fitted into the magnetic gap 25 of the magnetic circuit 24.
[0046]
The cross-sectional shape of the diaphragm 27 on the inner peripheral side of the joint portion
with the voice coil 28 is configured by forming a recess 27A in a part of the substantially domeshaped portion.
[0047]
With this configuration, by forming the depression 27A in the diaphragm 27, the entire height
dimension of the diaphragm 27 can be thinned and the shape rigidity can be enhanced, and
unnecessary resonance can be reduced. Stabilization of pressure frequency characteristics can be
realized.
[0048]
Here, the external shape of the diaphragm 27 is not limited to the elliptical shape as shown in the
present embodiment, and may be any shape other than a circle.
[0049]
Second Embodiment The invention according to the third aspect of the present invention will be
described below with reference to a second embodiment.
[0050]
FIG. 3 shows a plan view of a loudspeaker according to an embodiment of the present invention.
[0051]
Only the difference from the first embodiment will be described.
[0052]
FIG. 3 illustrates the outer shape of the diaphragm 27 as a track.
12-04-2019
8
[0053]
With this configuration, the linear portion of the speaker formed of the track shape having the
linear portion is disposed in the vertical direction close to the both sides of the liquid crystal
panel for image display, thereby further downsizing the device. be able to.
[0054]
Third Embodiment The invention according to the fourth aspect of the present invention will be
described below with reference to the third embodiment.
[0055]
FIG. 4 shows a plan view of a loudspeaker according to an embodiment of the present invention.
[0056]
Only the difference from the first embodiment will be described.
[0057]
FIG. 4 shows the outer shape of the diaphragm 27 as a rectangular shape.
[0058]
With this configuration, the linear portion in the longitudinal direction of the speaker, which is
formed of a rectangular shape having a linear portion, is disposed in the longitudinal direction
close to the both sides of the liquid crystal panel for image display, thereby further downsizing
Can be implemented.
[0059]
Fourth Embodiment The invention according to the fifth aspect of the present invention will be
described below with reference to a fourth embodiment.
[0060]
FIG. 5 is a cross-sectional view of an essential part of a mobile phone which is an electronic
apparatus according to an embodiment of the present invention.
12-04-2019
9
[0061]
As shown in FIG. 5, a mobile phone 80 is configured by mounting any one of the speakers 30
according to claims 1 to 4.
[0062]
Here, as a configuration of the mobile phone 80, components such as the speaker 30, the
electronic circuit 40, the liquid crystal display 60 and the like are mounted inside the exterior
case 70 to constitute a main part of the mobile phone 80.
[0063]
With this configuration, thinning and downsizing of the electronic device such as a mobile phone
can be achieved.
[0064]
The speaker and the electronic device according to the present invention can be applied to a
speaker, an audiovisual device, an information communication device, an electronic device such
as a game device, which needs to be thinned and miniaturized.
[0065]
Cross-sectional view of a speaker according to an embodiment of the present invention A plan
view of a speaker according to an embodiment of the present invention A plan view of a speaker
according to an embodiment of the present invention A plan view of a speaker according to an
embodiment of the present invention Cross-sectional view of an electronic device according to an
embodiment of the present invention
Explanation of sign
[0066]
21 magnet 22 upper plate 23 yoke 24 magnetic circuit 25 magnetic gap 26 frame 27 diaphragm
27A diaphragm depression 28 voice coil 30 speaker 40 electronic circuit 60 liquid crystal
display 70 exterior case 80 mobile phone
12-04-2019
10
Документ
Категория
Без категории
Просмотров
0
Размер файла
18 Кб
Теги
description, jp2005184588
1/--страниц
Пожаловаться на содержимое документа