close

Вход

Забыли?

вход по аккаунту

JP2007005992

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 JP2007005992
The present invention relates to a speaker diaphragm used in an audio device, a speaker using
the same, and an electronic device and apparatus using the speaker, achieving stable sound
quality and characteristics of the speaker, and an appearance. It is something that can be
According to the present invention, by forming a speaker diaphragm 27 including at least an
amphoteric polyacrylamide resin-based paper strength agent as an internal additive, the
diaphragm 27 can be improved in fixing regardless of the water quality. The variation in physical
properties of the speaker can be suppressed, and stable sound quality, characteristics, and
appearance of the speaker can be realized. [Selected figure] Figure 1
Speaker diaphragm, speaker using the same, electronic apparatus and apparatus using the
speaker
[0001]
The present invention relates to a speaker diaphragm used for various audio devices and video
devices, and electronic devices and devices such as speakers, stereo sets, and television sets
using the same.
[0002]
Since the paper diaphragm has a small specific gravity and an appropriate internal loss, it is the
mainstream of the speaker diaphragm even at present.
[0003]
Conventional paper diaphragms usually use aluminum sulfate in the paper making process to
10-05-2019
1
stabilize the quality.
[0004]
Since these speaker diaphragms are important parts that determine the sound quality of the
audio equipment, many studies have been conducted on prescriptions and production methods
for stably manufacturing a paper diaphragm.
[0005]
As prior art document information related to the invention of this application, for example,
Patent Document 1 is known.
Japanese Patent Application Publication No. 2003-230197
[0006]
The conventional paper diaphragm is the fixation to pulp fiber by the ionic bond through
aluminum sulfate, but the form of fixation changes greatly depending on the water quality,
especially the pH, the metal ion concentration and the contained organic substance, and the
physical properties of the diaphragm The problem is that the sound quality variation and the
appearance variation of the speaker are generated.
[0007]
The factor that determines the characteristics of the paper diaphragm is the chemical treatment
process, and variations in the fixation of the chemicals here lead to variations in the sound
quality and the appearance of the speaker.
[0008]
For this reason, in order to eliminate variations in fixing of the chemicals in the chemical
treatment process, by selecting a chemical that can self-fix by hydrogen bonding with cellulose in
the pulp, variations due to water quality of fixing can be eliminated. It is
[0009]
That is, the speaker diaphragm is configured to include at least an amphoteric polyacrylamide
10-05-2019
2
resin-based paper strengthening agent as an internal additive.
[0010]
With this configuration, fixing is improved regardless of the water quality, and variations in the
physical properties of the diaphragm can be suppressed, and as a result, variations in the sound
quality and variations in the appearance of the speaker can be reduced.
[0011]
As described above, according to the present invention, the speaker diaphragm is configured to
include at least the amphoteric polyacrylamide resin-based paper strength agent as the internal
additive.
[0012]
With this configuration, fixing can be improved regardless of the water quality, and variations in
the physical properties of the diaphragm can be suppressed, whereby stable sound quality and
appearance of the speaker can be realized without variation.
[0013]
Hereinafter, embodiments of the present invention will be described using the drawings.
[0014]
First Embodiment The first to sixth aspects of the present invention will be particularly described
with reference to the first embodiment.
[0015]
FIG. 1 is a cross-sectional view of a speaker diaphragm according to an embodiment of the
present invention.
[0016]
As shown in FIG. 1, since the diaphragm 27 is used as a speaker diaphragm, its shape is formed
by forming a paper in a conical shape.
[0017]
10-05-2019
3
In terms of material, it contains 50% or more by weight of pulp, and is configured as a speaker
diaphragm using an amphoteric polyacrylamide resin based paper strength agent as an internal
additive.
[0018]
Here, the amphoteric polyacrylamide resin is called a paper strength agent which fixes on paper
and improves the physical properties of paper, and is a compound capable of hydrogen bonding
with cellulose.
[0019]
This amphoteric polyacrylamide resin forms a network with good hydrogen bonds with cellulose,
and in diaphragms where the speed of sound (Young's modulus E / square root of density ρ) is
important, it exerts a remarkable effect as a reinforcing agent for pulp. .
[0020]
With this configuration, fixing can be improved regardless of the water quality, and variations in
the physical properties of the diaphragm can be suppressed, whereby a speaker diaphragm that
can achieve stable sound quality and appearance without variation can be obtained. .
[0021]
In addition, the speaker diaphragm may be configured to use a dye fixing agent of a cationic
polyvinylamine compound and an anionic dye as a coloring agent.
[0022]
These are a fixing agent and dye for dyes when colored, and coloring with dyes is usually
susceptible to water quality and the appearance quality is difficult to stabilize.
[0023]
By this constitution, the fixing property of the dye when coloring is improved, and the influence
of the water quality becomes difficult.
Therefore, this combination is optimal for a speaker diaphragm which is an appearance product.
10-05-2019
4
[0024]
In addition, a styrene-based polymer may be used as a surface sizing agent for the speaker
diaphragm.
[0025]
With this configuration, a speaker diaphragm having a large surface modification effect can be
obtained.
[0026]
Of course there is no problem with using a sizing agent such as alkyl ketene dimer, alkenyl
succinic anhydride, neutral rosin emulsion etc. as a sizing agent, but using a styrenic polymer can
further enhance the surface modification effect .
[0027]
Further, the speaker diaphragm may be made to react with polyamide and epichlorohydrin as a
wet strength agent.
[0028]
By adopting this constitution, the fixability can be further improved by modifying the
polyacrylamide resin with epichlorohydrin in combination with the above-mentioned amphoteric
polyacrylamide resin-based paper strengthening agent, and the effect is extremely enhanced.
large.
[0029]
Furthermore, the present invention does not particularly limit the use of known additives,
inorganic fillers and the like added to the diaphragm.
[0030]
In addition, an example of the best mode for carrying out the present invention will be shown
below.
[0031]
10-05-2019
5
In the best embodiment of the present invention, after fixing on a pulp obtained by beating down
a cationic vinylamine of 0.5 to 3% in solid content and a dye of 2 to 15% in solid content, 0.3 to 3
in solid content After adding 2% amphoteric polyacrylamide as a dry strength agent and then
adding 0.5 to 3% epichlorohydrin modified polyacrylamide as a wet strength agent in solid
content, 1 to 5% surface size of styrenic polymer The method used as an agent is preferred.
[0032]
(Examples 1, 2 and 3) To PUKP pulp refined into 600 ml, 0.5% of solid content by dye fixing
agent Catiofast VSH (manufactured by BAF Japan) and 8% of solid content by anionic dye were
added.
After that, 0.5% of DS4374 (Shokko PMC made amphoteric polyacrylamide) in solid content,
1.2% of WS 552 (epichlorohydrin modified polyacrylamide made in Starlight PMS) in solid
content, solid SS2072 (styrene polymer made by Starlight PMC) A paper cone was made by the
method of putting 3% sequentially in minutes.
[0033]
Three types of water were used: soft water with German hardness 2 DH, hard water with 20 DH,
and water containing 20 mg / L organic matter.
[0034]
(Comparative Examples 1, 2, and 3) The same method as in the conventional method using
aluminum sulfate was performed.
Result: The burst strength in the low pressure Murren method described in JISP 8112 is as
follows: Example 1: water of 2 DH 3.1 kg / cm <2> Example 2: water of 20 DH 3.1 kg / cm <2>
Example 3: organic substance Much Water 3.1 kg / cm <2> Comparative Example 1: Water of 2
DH 3.0 kg / cm <2> Comparative Example 2: Water of 20 DH 1.2 kg / cm <2> Comparative
Example 3: Water with Many Organic Matter 1. 8 kg / cm <2> Moreover, as a result of
incorporating each in a speaker and evaluating sound quality, Examples 1-3 and Comparative
Example 1 were almost the same sound quality, but Comparative Examples 2 and 3 sound in the
high range. The pressure was low and not powerful.
10-05-2019
6
[0035]
From the above results, it is possible to obtain a speaker diaphragm that improves fixing
regardless of the water quality, and demonstrates the effectiveness of the present invention that
stable sound quality and characteristics of the speaker, and further, appearance can be realized. I
was able to.
[0036]
Second Embodiment The invention according to the seventh aspect of the present invention will
be described below with reference to a second embodiment.
[0037]
FIG. 2 shows a cross-sectional view of a speaker according to an embodiment of the present
invention.
[0038]
As shown in FIG. 2, the magnetized magnet 21 is sandwiched between the upper plate 22 and the
yoke 23 to form an internal magnetic circuit 24.
[0039]
The frame 26 is coupled to the yoke 23 of the magnetic circuit 24.
The outer periphery of any one of the diaphragms 27 according to claims 1 to 6 is adhered to the
peripheral portion of the frame 26 via an edge 29.
Then, one end of the voice coil 28 is coupled to the inner peripheral portion of the diaphragm
27, and the other end is coupled so as to be fitted into the magnetic gap 25 of the magnetic
circuit 24.
[0040]
Although the above has described the speaker having the internal magnet type magnetic circuit
10-05-2019
7
24, the present invention is not limited to this, and may be applied to a speaker having the
external magnet type magnetic circuit.
[0041]
Furthermore, the present invention can also be applied to a small speaker for a mobile phone or
the like in which the diaphragm 27 and the edge 29 are integrated.
[0042]
With this configuration, as described in the first embodiment, it is possible to obtain a speaker
diaphragm that improves fixing regardless of the water quality, and a speaker that can realize
stable sound quality, characteristics, and appearance. You can get it.
[0043]
Third Embodiment The invention according to the eighth aspect of the present invention will be
described below with reference to a third embodiment.
[0044]
FIG. 3 is an external view of an audio mini-component system which is an electronic device
according to an embodiment of the present invention.
[0045]
As shown in FIG. 3, the speaker 30 of the present invention is incorporated in the enclosure 41
to constitute a speaker system, and an amplifier 42 which is a means for amplifying an electric
signal input to the speaker 30 and a source input to the amplifier 42 And an audio minicomponent system 44, which is an electronic device.
[0046]
With this configuration, it is possible to obtain an electronic device such as a speaker system
capable of realizing stable sound quality and characteristics, which can not be realized
conventionally, and an appearance, and an audio mini-component system.
[0047]
Fourth Embodiment The fourth embodiment of the present invention will be described below in
detail.
10-05-2019
8
[0048]
FIG. 4 shows a cross-sectional view of an automobile 50 which is a device of an embodiment of
the present invention.
[0049]
As shown in FIG. 4, the speaker 30 of the present invention is incorporated in a rear tray or a
front panel, and is used as a part of a car navigation system or a car audio system to constitute
an automobile 50.
[0050]
With this configuration, stable sound quality and characteristics of the speaker 30, and further,
an appearance can be realized, and the performance and quality of a device such as an
automobile equipped with the speaker 30 can be improved.
[0051]
The speaker diaphragm, the speaker, the electronic device and the device according to the
present invention are applied to electronic devices such as audiovisual devices and information
communication devices which require stable sound quality and characteristics and appearance,
and further to devices such as automobiles. Useful for
[0052]
Cross-sectional view of loudspeaker diaphragm in one embodiment of the present invention
Cross-sectional view of loudspeaker in one embodiment of the present invention External view of
electronic device in one embodiment of the present invention of device in one embodiment of the
present invention Cross section
Explanation of sign
[0053]
21 magnet 22 upper plate 23 yoke 24 magnetic circuit 25 magnetic gap 26 frame 27 diaphragm
28 voice coil 29 edge 30 speaker 41 enclosure 42 amplifier 43 player 44 mini component
system 50 automobile
10-05-2019
9
10-05-2019
10
1/--страниц
Пожаловаться на содержимое документа