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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view showing an embodiment
of a speaker according to the present invention. 1 ······ Magnetic circuit, 6 · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · voice coil, 12 · · · ..... Magnetic gap.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker having
an edge provided with a damping agent excellent in weather resistance and heat resistance. As a
conventional speaker, the thing of an acrylic polymer type ¦ system ¦ group was used as a
damping agent of an edge. This acrylic polymer type damping agent is stable and exhibits good
properties under normal use conditions, but at high temperatures of 100 ° C. or less, solid
content penetrates into the corn surface and volatilizes, thereby decreasing. There is a
disadvantage that the braking effect of the age is significantly reduced. 733 / v, ..., '2 The present
invention is to eliminate the conventional drawbacks such as the following. Hereinafter,
embodiments of the present invention will be described with reference to the drawings. In the
drawing, reference numeral 1 denotes a magnetic circuit, and the magnetic circuit 1 comprises a
plate 3 having a center pole 2, a ring magnet 4, and a ring upper grate 6; The peripheral edge of
the frame 6 is fixed together with the gasket 7 by bonding or the like at the peripheral edge of
the edge 90 of the diaphragm 8. The ENON 9 is formed of a cloth molding edge, and an edge
paint made of a silicone rubber adhesive is applied as a damping agent. The silicone rubberbased pressure-sensitive adhesive is based on chain-form horganopolysiloxane as a base conduit,
keto 1st xymunlan as a cross-linking agent, and Nori force filler as a reinforcing agent, and has
an elongation of 300-400. %, Maintaining the physical properties for 1000 years in the
temperature range of 1800 to -55 ° C. 3 A voice coil 10 is coupled to the center of a diaphragm
8 provided with such a free edge 9. The middle portion of the voice coil 10 is held by a dovetail
bar 11 and eccentric to the magnetic cap 12 of the magnetic circuit 1 The dust cap 13 is
attached to the upper surface of the central portion of the diaphragm 8 without being pressed. In
this way, the silicon rubber based adhesive has excellent weather resistance and i1i 'coldness,
heat resistance and water resistance, and it changes most even if exposed to sunlight, ozone,
wind and snow, sea water and heat for a long time The elasticity is semipermanent, even for the
distortion due to the amplitude of the V-edge 9. Thus, the speaker of the present invention can be
made excellent in weather resistance, heat resistance and water resistance, can be made stable in
quality that can be custom-maintained over a long period of time, and has a large practical value.
It is a thing.
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