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JPS52163322

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DESCRIPTION JPS52163322
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the prior art, FIG. 2 is
a cross-sectional view of the present invention, and FIG. 3 is a graph of frequency characteristics.
1 ииииии Con paper, 2 иии и и и и и и и и и и и и и и и и thick elastic island
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of the junction between cone paper and edge of an electrodynamic speaker. The conventional
joint portion has a nineteen structure in which a part of the edge 12) is adhered to the outer
peripheral edge of the cone paper port) as shown in FIG. This bonding is held between the gold
parts and heated and crimped) a portion of this rounded corn paper [1)! 3 h, the swarf is
deformed thinly by the pressure at the time of pressure bonding, and the strength of the portion
decreases. For this reason, the reproduction characteristics are deteriorated. The invention ?
materials and structures OI! The purpose is to eliminate from the point. The electrodynamic
speaker according to the present invention comprises an elastic thick portion (2 ░) of an edge
and a peripheral portion of a K-cone paper fil as shown in FIG. By force, the edge (2) and the corn
paper 11) are crimped with an adhesive (3). The edge 12) uses foamed plastic, for example,
foamed urethane. At the time of joining, the upper and lower molds elastically deform the wall
thickness ff1 (2,) when the cone paper ill and the edge (21 are pressurized, and press-contacted
to the peripheral portion of the cone paper il + by its own elasticity . In this case, the cone paper
(1), inner thick part (2) O does not change thinly due to elastic deformation; 2) l, and the thick
part (2,) adapts to the peripheral surface of the cone paper 1110 by its elasticity So the adhesion
between them is perfect Km-grain. Even if the edge of the pair of O-all's l l l0 irregular-shaped or
l- paper rolls is partially changed, a perfect adhesion state can be obtained due to the elastic
deformation of the inner thick portion (26). The graph in Fig. 3 shows the results obtained when
the frequency characteristics were measured using a 25 [13-aperture speaker] in order to
confirm the effect of the present invention. As is clear from the graph, according to the present
invention, the fluctuation of the sound pressure in the high region is suppressed, and the gain is
12-05-2019
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also improved by 3 to 5 (dlB). In the present invention, due to the elastic action of the edge, the
cone paper does not deform during pressure-adhesion and does not exhibit a decrease in
strength, and the elastic inner thickness S bonds with O which absorbs O mismatch +311 such as
a mold. There is an advantage that the zero frequency characteristic is improved at high
frequencies from these facts.
12-05-2019
2
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