close

Вход

Забыли?

вход по аккаунту

?

JP2007215222

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 JP2007215222
The present invention provides a speaker device having wide-area reproduction capability by
reducing resonance peaks of frequency characteristics. SOLUTION: The resonance frequencies of
the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b are made different
by making the curvature radiuses R, R of the inner peripheral diaphragm 10a and the outer
peripheral diaphragm 10b different. Further, the areas S and S of the inner peripheral diaphragm
10a and the outer peripheral diaphragm 10b are equalized, and the sound pressure levels of both
diaphragms 10a and 10b are equalized. [Selected figure] Figure 1
Speaker device
[0001]
The present invention relates to a speaker device, and in particular, a diaphragm configured of a
ring-shaped inner peripheral diaphragm to which a voice coil is attached on the outer periphery
and a ring-shaped outer peripheral diaphragm to which the voice coil is attached The present
invention relates to a provided speaker device.
[0002]
In general, the speaker device is wound around a diaphragm for generating a sound wave, a voice
coil bobbin integrally provided with the diaphragm and elastically supported by a damper
capable of vibration, etc., and a voice coil bobbin. It is known to have a voice coil located at
[0003]
This speaker device vibrates the diaphragm through the voice coil by flowing a current
12-05-2019
1
corresponding to the reproduction sound to the voice coil, and generates a sound wave as
acoustic energy.
[0004]
By the way, in recent years, with the spread of DVD and the like, a speaker device having widearea reproduction capability is required.
For this reason, it is desirable to reduce the resonance peak in the frequency characteristic of the
speaker device and eliminate unnecessary sound as much as possible.
[0005]
Therefore, the present invention has an object to provide a speaker device having wide-area
reproduction capability by reducing the resonance peak of the frequency characteristic, taking
the above problems as an example.
[0006]
The invention according to claim 1 made in order to solve the above problems is a speaker
device comprising a frame, a vibrating body having a diaphragm and a voice coil, and a magnetic
circuit having a magnet, a yoke and a plate. The plate includes an inner peripheral diaphragm
and an outer peripheral diaphragm surrounding the inner peripheral diaphragm, the inner
peripheral portion of the inner peripheral diaphragm and the outer peripheral portion of the
outer peripheral diaphragm being supported by the frame, A speaker device according to the
present invention is characterized in that the inner peripheral diaphragm and the outer
peripheral diaphragm are formed in a curved shape so as to have different curvature radii.
[0007]
The invention according to claim 2 is characterized in that an angle formed by the tangent at the
outer peripheral portion of the inner peripheral diaphragm and the vibration direction of the
vibrator, the tangent at the inner peripheral portion of the outer peripheral diaphragm, and the
diaphragm The speaker device according to claim 1, wherein the vibration direction is different
from the angle formed by the vibration direction.
[0008]
12-05-2019
2
The invention according to claim 3 resides in the speaker apparatus according to claim 1 or 2,
wherein the areas of the inner peripheral diaphragm and the outer peripheral diaphragm are
substantially the same.
[0009]
The invention according to claim 4 is characterized in that an edge is attached to an inner
peripheral portion of the inner peripheral diaphragm and an outer peripheral portion of the
outer peripheral diaphragm, and the edge is supported by the frame. It exists in the speaker
apparatus of any one of -3.
[0010]
The invention according to claim 5 is characterized in that the height of the inner peripheral
diaphragm with respect to the voice coil and the height of the outer peripheral diaphragm with
respect to the voice coil are substantially the same. It exists in the speaker apparatus of item 1.
[0011]
The invention according to claim 6 resides in the speaker device according to any one of claims 1
to 5, wherein a horn is disposed on the front side of the diaphragm.
[0012]
The invention according to claim 7 resides in the speaker device according to any one of claims 1
to 6, wherein the inner peripheral diaphragm and the outer peripheral diaphragm are integrally
formed.
[0013]
The invention according to claim 8 resides in the speaker device according to any one of claims 1
to 7, wherein a protective member is disposed on the front side of the diaphragm.
[0014]
As described above, according to the first to eighth aspects of the present invention, the inner
peripheral diaphragm and the outer peripheral diaphragm are formed in a curved surface shape
so that the curvature radius of each other is different.
12-05-2019
3
Therefore, in the frequency characteristic of the whole diaphragm, which is the frequency
characteristic combining the frequency characteristic of the inner peripheral diaphragm and the
frequency characteristic of the outer peripheral diaphragm, the resonance peak can be reduced,
and the frequency characteristic can be made flat. it can.
[0015]
Hereinafter, embodiments of the present invention will be described based on the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a diaphragm constituting the speaker
device of the present invention.
[0016]
As shown to the same figure, the speaker apparatus is equipped with the diaphragm 10 which
vibrates and produces | generates an acoustic wave.
And, as for this diaphragm 10, a ring-shaped inner peripheral diaphragm 10a on which the voice
coil bobbin 12 around which the voice coil 11 is wound is attached on the outer periphery and a
ring on which the voice coil bobbin 12 is attached on the inner periphery And an outer
peripheral diaphragm 10b.
[0017]
The inner periphery of the inner peripheral diaphragm 10a described above and the outer
periphery of the outer peripheral diaphragm 10b are fixed to the frame 14 via a ring-shaped
edge 13 having both appropriate compliance and combination.
The diaphragm 13 and the voice coil bobbin 12 can be elastically supported by the edge 13.
12-05-2019
4
The inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b described above
may be integrally formed.
Further, the diaphragms 10a and 10b and the voice coil bobbin 12 may be integrally formed.
[0018]
Each of the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b has a
curvature in the radial direction.
In the figure, R1 indicates the curvature radius of the curved surface to which the curvature of
the inner peripheral diaphragm 10a is given, and R2 indicates the curvature radius of the curved
surface to which the curvature of the outer peripheral diaphragm 10b is given.
In the speaker device of the present invention, the resonance frequency between the inner
peripheral diaphragm 10a and the outer peripheral diaphragm 10b is obtained by making the
curvature radius R1 of the inner peripheral diaphragm 10a and the curvature radius R2 of the
outer peripheral diaphragm 10b different from each other. Are different.
[0019]
Furthermore, in the speaker device of the present invention, by equalizing the area S1 of the
inner peripheral diaphragm 10a and the area S2 of the outer peripheral diaphragm 10, the sound
pressure levels of the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b
are obtained. It is equal.
[0020]
Moreover, the speaker apparatus incorporating the diaphragm mentioned above becomes as
shown to FIG. 2 (a), (b).
The figure (a) is a front view of a speaker apparatus, (b) is a sectional view which met an AA 'line
in a front view.
12-05-2019
5
As shown in the figure, the speaker device further includes a magnet 15, a top plate 16 disposed
above the magnet 15, and yokes 17 disposed below and around the magnet 15.
Further, on the front surface of the diaphragm 10, a protection member 19 for protecting the
diaphragm 10 is attached.
[0021]
Furthermore, a magnetic gap 18 is provided between the top plate 16 and the yoke 17.
The above-described members constitute a magnetic circuit in which the top plate 16, the
magnetic gap 18, the yoke 17, and the magnet 15 make a circuit. The voice coil 11 is disposed in
the magnetic gap 18.
[0022]
The frequency characteristics of the speaker apparatus having the above-described configuration
will be described below with reference to FIGS. 3 and 4. FIG. 3A is a graph showing frequency
characteristics A and B of each of the inner peripheral diaphragm 10a and the outer peripheral
diaphragm 10b.
[0023]
As described in the above-described configuration, by setting the curvature radius R1 and the
curvature radius R2, it is possible to shift the resonance frequency of the inner peripheral
diaphragm 10a and the outer peripheral diaphragm 10b. Further, by setting the area S1 to the
area S2, the sound pressure levels of the inner peripheral diaphragm 10a and the outer
peripheral diaphragm 10b can be made almost equal. In the present embodiment, the resonance
frequency is a high frequency resonance frequency.
12-05-2019
6
[0024]
Therefore, in the frequency characteristic of the entire diaphragm 10 which is the frequency
characteristic obtained by combining the frequency characteristic of the inner peripheral
diaphragm 10a and the frequency characteristic of the outer peripheral diaphragm 10b shown in
FIG. It can be reduced and the frequency characteristic can be made flat. Therefore, the speaker
device of the present invention can have wide-area reproduction capability.
[0025]
In order to make the above-mentioned frequency characteristics flat, the conventional speaker
device shown in FIG. 4 in which the resonance frequency of the inner peripheral diaphragm 10a
and the outer peripheral diaphragm 10b is the same. This is also apparent from the graph
showing the frequency characteristic D of As shown in the figure, in the conventional speaker
device, the resonance peak Qp in the high region is not reduced, and the region where the
frequency characteristic is flat is narrow. In contrast, in the speaker device of the present
invention, the resonance peak is reduced, hardly appears, and the region where the frequency
characteristic is flat is wide.
[0026]
According to the above-described speaker device, simply by making the curvature radii R1 and
R2 of the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b different, that
is, the curvatures different, the resonance between the inner peripheral diaphragm 10a and the
outer peripheral diaphragm 10b The frequency is different. Moreover, by providing the inner
peripheral diaphragm 10a and the outer peripheral diaphragm 10b with curvatures, it is possible
to prevent deformation and divided vibration of the diaphragm 10 in the high frequency band.
[0027]
Further, according to the above-described speaker device, by equalizing the areas S1 and S2 of
the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b, the sound pressure
levels of the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b can be
obtained. Since the resonance peaks of the inner peripheral diaphragm 10a and the outer
peripheral diaphragm 10b can be equalized, the resonance peak can be further reduced and the
frequency characteristic is flat. Can be
12-05-2019
7
[0028]
According to the embodiment described above, the resonance frequencies of the outer peripheral
diaphragm 10a and the inner peripheral diaphragm 10b are made different by giving curvatures
to both the diaphragms 10a and 10b and setting the curvature radius R1 and the curvature
radius R2. It was
However, the method of making the resonance frequencies different is not limited to the abovedescribed one. For example, it is also possible to make the apex angles θ1 and θ2 (see FIG. 1) of
the outer peripheral diaphragm 10a and the inner peripheral diaphragm 10b different.
Conceivable.
[0029]
The apex angle θ1 is a straight line 13 perpendicular to the winding direction of the voice coil
11, a tangent l1 to the curved surface of the inner peripheral diaphragm 10a, and a tangent l1
passing through the outer periphery of the inner peripheral diaphragm 10a It is an angle that
The apex angle θ2 is an angle formed by a straight line 13 and a tangent line 12 tangent to the
curved surface of the outer peripheral diaphragm 10b and passing through the inner periphery
of the outer peripheral diaphragm 10b. Also in this case, the frequency characteristics can be
made flat as in the above-described embodiment.
[0030]
Moreover, according to the embodiment described above, the curvature is given in the radial
direction of the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b.
However, the present invention is not limited to this, and as long as the resonance frequencies of
the inner peripheral diaphragm 10a and the outer peripheral diaphragm 10b are different, for
example, as shown in FIG. It may be However, if it is linear, deformation and divided vibration of
the diaphragm 10 in the high frequency band are likely to occur. Therefore, as described above,
the diaphragm 10 with different curvatures is preferable.
12-05-2019
8
[0031]
Moreover, according to the embodiment described above, it is a so-called cone type speaker
device in which the sound waves generated from the diaphragm 10 are directly diffused.
However, the present invention is not limited to this, and can also be applied to a horn-type
speaker device provided with a horn for guiding an acoustic wave generated from the diaphragm
10 to the opening. FIGS. 6A and 6B show an embodiment of a horn-type speaker device. The
same figure (a) is a front view of a horn type speaker device, and (b) is a sectional view which
met a B-B 'line in a front view. In the figure, on the front surface of the diaphragm 10, a horn 20
for guiding a sound wave from the diaphragm 10 to the opening 21 is attached.
[0032]
It is a sectional view showing one embodiment of a diaphragm which constitutes a speaker
device of the present invention. It is the front view and AA 'sectional drawing which show one
Embodiment of the speaker apparatus incorporating the diaphragm of FIG. (A) is a graph which
shows the frequency characteristic of each of the inner peripheral diaphragm 10a which
comprises the speaker apparatus of FIG. 2, and the outer peripheral diaphragm 10b. (B) is a
graph which shows the frequency characteristic of diaphragm 10 whole which comprises the
speaker apparatus of FIG. It is a graph which shows the frequency characteristic of the speaker
apparatus of this invention, and the conventional speaker apparatus. It is a block diagram which
shows other embodiment of the diaphragm used for the speaker apparatus of this invention. It is
the front view and BB 'cross section which show one Embodiment of the horn type speaker
apparatus to which the speaker apparatus of this invention is applied.
Explanation of sign
[0033]
10 diaphragm 10a inner peripheral diaphragm 10b outer peripheral diaphragm 11 voice coil 19
protective member 20 horn R1, R2 curvature radius
12-05-2019
9
Документ
Категория
Без категории
Просмотров
0
Размер файла
16 Кб
Теги
jp2007215222
1/--страниц
Пожаловаться на содержимое документа