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JP2003052099

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DESCRIPTION JP2003052099
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device (H04R7 / 14).
[0002]
2. Description of the Related Art Generally, the diaphragm of a speaker is preferably hard, light
and non-resonant. Therefore, focusing on the material of the diaphragm, it is possible to make
the material thinner and lighter by increasing the Young's modulus and the internal loss by
mixing various things in paper or using a resin with similar physical properties, and the shape is
also flat. Many things like Among them, in order to avoid resonance due to the shape, there is
one in which an uneven surface whose cross-sectional shape is continuous in the circumferential
direction and from the top to the peripheral direction is formed. In addition, there is also a thing
that emphasizes the luster by intentionally engraving a regular groove on the surface of the
resin.
[0003]
Conventionally, as a speaker diaphragm provided with this diaphragm, for example, there is one
described in Japanese Patent Laid-Open No. 6-225385. FIG. 6 shows a cross-sectional view of the
speaker diaphragm of the embodiment described in this Japanese Patent Application Laid-Open
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1
No. 6-225385.
[0004]
However, in the general flat plate shape as described above, the Young's modulus and the
internal loss can only be dependent on the material properties of the diaphragm, and since it is a
flat plate shape, the division is beautiful according to the shape. Resonance was likely to occur.
[0005]
In the case where the diaphragm has a continuous concave and convex shape, it is not effective
for reproduction of the mid-low range, because the bellows-like element has a large vibration to
be divided and vibrated.
The present invention provides a diaphragm that is rigid, light, has a large internal loss and looks
good.
[0006]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to a
first aspect of the present invention, the first aspect of the present invention relates to a speaker
diaphragm having a diameter of 870 nm or less, an interval of 1600 nm or less, and a depth of
1600 nm or less. The present invention is a speaker diaphragm characterized in that a convex
surface or an uneven surface or a concave surface is provided.
[0007]
As described above, according to the first aspect of the present invention, not only the rigidity of
the diaphragm can be raised by providing a fine asperity surface in a portion necessary for the
strength of the diaphragm, but the asperity is far more than the material resonant frequency.
Because it is small, resonance does not occur easily and internal loss is improved to suppress
resonance.
Furthermore, it is possible to provide a large number of concave surfaces on unnecessary
surfaces of strength and to reduce the weight of the material. In addition, since the surface area
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of the diaphragm is also increased in total, the amount of air discharged from the diaphragm is
increased, and it is possible to make a louder sound.
[0008]
In order to solve the above-mentioned problems, in the second invention, the speaker diaphragm
is formed of a transparent resin, provided with an uneven surface according to the wavelength of
light, and the uneven surface has a high reflectance. It is a speaker diaphragm characterized by
vapor-depositing and forming a paint.
[0009]
As described above, according to the second aspect of the present invention, a fine uneven
surface matched to the wavelength of light is provided on a transparent resin diaphragm, and a
paint with good reflection efficiency is deposited on the uneven surface. Depending on the
joining direction, it is possible to obtain the light diffusion phenomenon and the interference
phenomenon, and it is also possible to obtain the effect that the surface glows iridescent.
[0010]
It is known that the wavelengths of light are in the range of 400 to 700 nm, and in general, they
are emphasized at half pitch at groove pitch and at odd multiples of quarter wavelength at
groove depth.
It is well known that patterns of various shapes can be raised or raised by intentionally matching
the shapes of the asperities to this.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to FIGS.
[0012]
Embodiment 1 FIG. 1 is a block diagram of a speaker diaphragm according to an embodiment 1
of the present invention, and FIG. 2 is a front perspective view showing a speaker apparatus
using the diaphragm of FIG. FIG. 3 is a diagram showing acoustic characteristics using the
diaphragm of FIG.
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[0013]
In FIG. 1, the surface of the speaker diaphragm 1 of the present invention is characterized in that
a convex surface 2 having a diameter of 870 nm, an interval of 1600 nm and a depth of 1600
nm is provided with a convex surface 2 or an uneven surface 3 or a concave surface 4. It is a
speaker diaphragm.
In the present embodiment, the diaphragm is in the shape of a mortar, and the thickness of the
substrate 5 is colored PP of 0.6 mm.
[0014]
As shown in FIG. 2, in the present embodiment, since the back surface of the speaker diaphragm
is made uneven, it is devised so that the unevenness can not be confirmed from the front view of
the diaphragm and the designability is not impaired.
In addition, as shown in FIG. 3, the rigidity of the diaphragm can be changed by intentionally
arranging the concavities and convexities as compared with the conventional diaphragm, so that
resonance occurring in the diaphragm can be suppressed. It can be seen that the sound pressure
can be increased by constructing a hard speaker diaphragm.
[0015]
Second Embodiment FIG. 4 shows the configuration of a speaker diaphragm according to a
second embodiment of the present invention.
In FIG. 4, the speaker diaphragm 6 of the present invention is characterized in that it is formed of
a transparent resin, the concave surface 7 is disposed in the circumferential direction, and the
concave surface 7 is formed by vapor-depositing the paint 8 having a high reflectance. It is a
speaker diaphragm.
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[0016]
In the embodiment, the diaphragm is flat, the thickness of the substrate 9 is polycarbonate of 0.3
mm, the concave shape is 200 nm in diameter, the concave pitch is 600 nm, the concave width is
400 nm, and the depth is 1600 nm It is. This makes it possible to configure a diaphragm that is
light and hard and iridescent like a CD.
[0017]
Of course, even if the concave surface of the example is a convex surface or an irregular surface,
it can be emphasized or blurred by adjusting to the wavelength height of the desired light. It is
also a well-known fact that a pattern is made to float by providing a certain line according to.
[0018]
Furthermore, it is possible to construct a diaphragm with a design priority in which the gloss is
prioritized and the sound quality is sacrificed.
FIG. 5 is a front perspective view showing a speaker apparatus using the diaphragm of FIG.
[0019]
According to the present invention as described above, it is possible to provide a speaker
diaphragm capable of intentionally forming a pattern, as well as being able to provide a speaker
diaphragm which is light, hard and has no resonance. It is a thing.
[0020]
Brief description of the drawings
[0021]
1 is a rear perspective view of the speaker diaphragm in the first embodiment of the present
invention
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[0022]
2 is a front perspective view of the speaker device according to the first embodiment of the
present invention.
[0023]
Fig. 3 Acoustic characteristic diagram in one embodiment of the present invention
[0024]
4 is a rear perspective view of the speaker diaphragm in the second embodiment of the present
invention
[0025]
5 is a front perspective view of the speaker device according to the second embodiment of the
present invention
[0026]
Fig. 6 Cross-sectional view of a speaker diaphragm in a conventional embodiment
[0027]
Explanation of sign
[0028]
Reference Signs List 1 speaker diaphragm 2 convex surface 3 uneven surface 4 concave surface
5 substrate 6 speaker diaphragm 7 concave surface 8 paint 9 substrate 10 speaker device 20
speaker device 30 edge portion
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