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JP2001359190

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2001359190
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
vibration system support member such as a damper or an edge for supporting a diaphragm of a
speaker.
[0002]
2. Description of the Related Art Conventionally, a speaker damper is generally manufactured by
impregnating a woven or non-woven fabric made of various fiber materials with a phenol resin, a
melamine resin or the like, and then heat-forming it.
[0003]
[Problems to be Solved by the Invention] In the case where a damper is manufactured by
impregnating a woven or non-woven fabric with a phenolic resin or the like, the phenolic resin
contains formaldehyde, so some people have dizziness, nausea, asthma And other harmful effects
on the human body, and also cause environmental pollution.
[0004]
Further, in the case of the resin impregnated as described above, the viscosity of the resin
changes due to the temperature and the volatilization of the solvent, so that the quality may vary.
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In order to prevent this, temperature control must always be properly done, which is
cumbersome.
[0005]
Furthermore, after the impregnating process, it is necessary to go through a drying process such
as heating with a heater, and there is also a problem in that it requires a heat source for that
purpose.
[0006]
The present invention has been proposed in view of the above, and the purpose of the invention
is to eliminate the need for impregnating a phenolic resin or the like in the manufacture of a
damper or the like, thereby preventing adverse effects on the human body and environmental
pollution. Also, the present invention provides a vibration system support member that is easy to
manufacture.
[0007]
[Means for Solving the Problems] The vibration system supporting member according to the
present invention is formed by placing a hot melt web 2 on at least one side of a fiber substrate 1
made of woven fabric or non-woven fabric, etc. It is characterized in that it is produced.
[0008]
In addition, it is characterized in that a plurality of hot melt webs 2 are piled up as needed.
[0009]
Furthermore, it is characterized in that the hot melt web 2 is partially superimposed on the
portion to be reinforced.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION The present invention places a hot melt web
on a conventional woven or non-woven fabric and heat and pressure-molds it, thereby
eliminating the need for an impregnation step, a drying step and the like.
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2
In addition, the hardness of the damper can be easily changed by increasing or decreasing the
number of webs at the time of manufacture, and a damper having desired characteristics can be
easily obtained.
Furthermore, the webs can be partially stacked, and reinforcement of the portions can be easily
performed.
[0011]
FIG. 1 shows an embodiment of the present invention.
In the figure, 1 is a conventional fibrous base material such as woven fabric or non-woven fabric,
and 2 is a web of hot melt coated on at least one side thereof.
The web 2 of the hot melt is a thin fibrous hot melt web previously produced by an appropriate
production method.
[0012]
The laminate may be formed into a desired shape by heat and pressure molding by a known
method such as a hot-cold method or a preheating method.
In this process, the intersections of the yarns of the fiber substrate 1 are adhered via the web 2
of the hot melt.
[0013]
Second Embodiment FIG. 2 shows a second embodiment of the present invention.
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3
This embodiment is characterized in that a plurality of hot melt webs 2 are laminated. Thus, the
displacement can be easily controlled by adjusting the number of sheets appropriately. This web
2 may be provided not only on one side of the fiber substrate 1 but also on the other side. The
displacement can also be adjusted by controlling the density of the web 2.
[0014]
Third Embodiment FIG. 3 shows a third embodiment of the present invention. In this example,
partial reinforcement can be easily achieved by partially overlapping the web 2 on the portion to
be reinforced.
[0015]
FIG. 4 shows an example of a speaker incorporating the damper manufactured according to the
present invention. In the figure, 3 is a diaphragm, 4 is a damper for supporting it, the inner
periphery is adhered to the voice coil 5, and the outer periphery is fixed at a predetermined
position of the frame 6. 7 is an edge provided at the outer peripheral portion of the diaphragm 3,
8 is a cap provided at the center of the diaphragm 4, 9 is a yoke, 10 is a magnet, 11 is a plate,
and a magnetic circuit 12 is formed by these. ing.
[0016]
Although the damper 4 has been described in the above embodiment, it is of course possible to
manufacture the edge 8 in the same manner.
[0017]
As described above, according to the present invention, since the impregnation step is not
required, the environment resistance is excellent.
Also, by omitting the impregnation step in which the viscosity changes with temperature and
variations in quality are likely to occur, the stability of the quality can be expected, and the
drying step is also unnecessary, thereby facilitating the production and reducing the cost. You
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4
can also
[0018]
Moreover, by adjusting the number of webs 2 of the hot melt, the hardness can be easily adjusted
and the displacement can be controlled.
[0019]
Furthermore, by partially providing the web 2, it is possible to easily perform partial
reinforcement, which has been difficult to carry out by the conventional impregnation method, to
a part having a large bending or the like.
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