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JPH1127789

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DESCRIPTION JPH1127789
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker diaphragm incorporated into various types of audio equipment.
[0002]
2. Description of the Related Art In recent years, information equipment having an acoustic
function has been miniaturized, and digitization of signals has progressed, and there has been a
demand for a miniaturized, thin, high-quality speaker. Along with that, it is also indispensable to
lower the minimum resonance frequency and to increase the rigidity of the speaker diaphragm.
[0003]
Based on such background, a speaker diaphragm used for a conventional small and thin speaker
will be described with reference to the top view of the speaker diaphragm in FIG. According to
the drawing, 2 is a main body, 1 is an edge portion provided on the peripheral edge of the main
body 2, and is integrally provided by a resin film.
[0004]
11-05-2019
1
However, in the above-described conventional configuration, when the thickness of the resin film
is reduced to reduce the lowest resonance frequency, there is a problem that the rigidity is
reduced and abnormal resonance occurs. In addition, when the thickness of the resin film is set
such that abnormal resonance does not occur, there is a problem that the minimum resonance
frequency is increased.
[0005]
An object of the present invention is to solve the conventional problems as described above, and
to provide a speaker diaphragm that enables wide-band, low-distortion sound quality
reproduction.
[0006]
[Means for Solving the Problems] In order to solve this problem, the speaker diaphragm of the
present invention comprises a resin film integrally formed with an edge portion of a main body
and its peripheral edge, and another resin bonded to the main body. It is possible to provide a
diaphragm for a speaker which is composed of a film and is suitable for wide band and low
distortion reproduction of sound quality.
[0007]
According to the first aspect of the present invention, the main body and the resin film in which
the peripheral edge portion is integrally formed, and another film laminated to the main body
The reduction of the resonance frequency and the increase of the rigidity of the main body of the
diaphragm can be achieved to achieve a wide band.
[0008]
The invention according to claim 2 is the one in which the other film according to claim 1 is
paper, which has higher rigidity and can reduce distortion.
[0009]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1
to 3.
11-05-2019
2
FIG. 1 is a top view of a speaker diaphragm according to an embodiment, and FIG. 2 is a crosssectional view of the same diaphragm.
The same parts as those of the prior art are designated by the same reference numerals and the
description thereof is omitted.
[0010]
According to the figure, 3 is another film superimposed on the main body 2.
FIG. 3 is a characteristic diagram comparing the frequency characteristics of sound pressure and
harmonic distortion of the speaker using the speaker diaphragm in the present embodiment with
the same characteristics of the speaker using the conventional speaker diaphragm. Is the sound
pressure frequency characteristic of the speaker using the speaker diaphragm in the present
embodiment, the solid line B is the harmonic distortion frequency characteristic of the same
speaker, and the broken line C is the sound pressure frequency characteristic of the speaker
using the conventional speaker diaphragm The broken line D shows the harmonic distortion
frequency characteristics of the same speaker.
[0011]
As apparent from FIG. 3, it was confirmed that the speaker diaphragm in the present
embodiment had a wider band and lower distortion than the conventional speaker diaphragm.
[0012]
As described above, in the speaker diaphragm according to the present embodiment, since the
thickness of the resin film can be reduced, the minimum resonance frequency can be reduced,
and the other film 3 is bonded to the main body 2 of the diaphragm to obtain high quality.
Because of the rigidity, this speaker diaphragm makes it possible to achieve a wide band and low
distortion of the speaker.
[0013]
In addition, it was confirmed that high rigidity and low distortion can be achieved by using
another film 3 as paper.
11-05-2019
3
[0014]
As described above, since the speaker diaphragm of the present invention is configured, it is
possible to reduce the minimum resonance frequency and to increase the rigidity of the main
body of the diaphragm, and is suitable for wide band and low distortion sound quality
reproduction. It is possible to provide a speaker diaphragm.
[0015]
Brief description of the drawings
[0016]
1 is a top view of the speaker diaphragm of the embodiment of the present invention
[0017]
Figure 2 same cross section
[0018]
Fig. 3 Frequency characteristics of the speaker using the same speaker diaphragm
[0019]
Fig. 4 Top view of the conventional speaker diaphragm
[0020]
Explanation of sign
[0021]
1 Edge 2 Body 3 Other film
11-05-2019
4
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