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JPH01269395

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DESCRIPTION JPH01269395
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker diaphragm used for various acoustic 1S devices. PRIOR ART A conventional base plate of
a speaker diaphragm is made of a 100% natural pulp integrated with a cone, and a natural valve
sheet as a free edge to be attached to the cone. There are woven fabrics impregnated with resin
such as NBR, urethane foam and the like. Problems to be solved by the invention 2 □-′ ′ 2
Fixed doesone has a problem that the lowest resonance frequency (fo) is high and heavy bass
reproduction can not be performed because the cone part is integrated. The edge based on the
natural valve seat among the extravagant free edges was such that if the amplitude was too large,
the edge could not be destroyed / the input of the lump could not be increased. However,
conventional woven fabrics and urethane edges can not be used for applications such as outdoor
use and baths where especially moisture resistance, blood resistance, etc. are required, and they
were handled with special materials and special coatings etc. There was a problem when the bad
cost increased significantly. Means of Solving the Problems In order to solve the abovementioned problems, the present invention is to coat a polyamide-based fabric with a
chlorosulfation-polymerized resin, which is a thermosetting resin, a large number of times, and
heat-form it into a predetermined shape. It is constructed by bonding a hen's enon to a corn part.
As described above, the combination of a polyamide fabric, which is a high-printed-heat material,
and a chlorosulfonated polymer 3 which is excellent in weather resistance, as well as
environmental properties such as chargeability and weatherability, is suitable for dog dogs. Do.
Further, by coating the chlorosulfone-on polymer many times, the air permeability is almost lost,
and the water vapor and the like are hardly passed, so that the moisture resistance and water
resistance are also greatly improved. EXAMPLE Hereinafter, a speaker diaphragm in an example
of the present invention will be described. About 2 ogr / 'of chlorophyll-phosphorous polymer to
polyamide fabric with a weight of 95 gr Δ 2? r? Coat 4 times with an eyelid weight and dry.
12-05-2019
1
This almost eliminates the breathability. The water pressure test (J I S -L-1096) gives a very good
value of about 300 mFI H2O (approximately the same value as the material used for the mass).
The Elan base material was punched out into a predetermined shape, and simultaneously molded
with a cone portion under a condition of a mold temperature of 200 ° C. and a pressing time of
10 seconds, to obtain a diaphragm for a speaker. The configuration is shown in FIG. 1, in which 1
indicates an edge and 2 indicates a cone. FIG. 2 shows respective frequency characteristics of a
speaker using the speaker diaphragm of the present invention and a conventional cloth edge.
The loudspeaker according to the present invention has high rigidity of the edge material as
indicated by the solid line and has little air permeability yet, and has flat frequency
characteristics with less edge resonance as compared with the characteristics of the conventional
loudspeaker indicated by the broken line. Since the speaker diaphragm of the present invention
is constructed as in the second aspect of the present invention, it is industrially excellent in heat
resistance, weather resistance, blood J wetness, and capable of providing flat frequency
characteristics with little excessive edge resonance. It is a dog of value.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view showing an embodiment of the speaker diaphragm of the present
invention, and FIG. 2 is a sound pressure frequency characteristic diagram of a speaker using the
conventional diaphragm and the diaphragm of the present invention.
1 · · · · · · · · · · · cone part.
12-05-2019
2
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