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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the vicinity of an edge
portion for explaining how an edge vibrates, and FIG. 2 is a perspective view of the vicinity of the
edge portion according to the present invention. In the figure, 1 is cone paper, 2 is an edge, and
3 is a cut. Fig. 1 Fig. 2 / -85-
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an edge of a
loudspeaker with improved linearity of the loudspeaker. The edge supporting the speaker's cone
paper vibrates as shown in vt1 as the cone paper vibrates. That is, FIG. 1 shows a cross-sectional
view of the cone paper peripheral portion 1 and the edge 2, and the cone paper 1F! When it
vibrates from the stationary position (shown by a solid line) to the positive side and negative side
(shown by a single-point chain), it changes to the bending point tia point Lb of the edge. The
bending point of this edge has a radius according to the magnitude of the vibration. When the
inflection point of the edge that is to move in the direction moves in the radial direction, the eight
points and the point b cause a gap ((1)) in the radial direction by d, +1 'from the position at rest.
Considering the entire edge formed in the ring shape of this offset light, the radius of Ma is
changed K, or in order to absorb this change, the edge is perpendicular to the circular face) I
have to stretch. Heretofore, this absorption of expansion and contraction has been performed by
one edge material or its shape. If this expansion and contraction is not absorbed by the whole
child, the edge will cause partial deformation and interfere with the vibration of the cone paper,
causing non-linear distortion, or generating abnormal noise. A large stretchability in the
circumferential direction θ is provided to ameliorate the disadvantages of the prior art as
described above. FIG. 2 shows the inside of the needle portion of the edge according to the
present invention, and the edge 2 is provided with a large number of cuts 3 extending radially
from the center of the cone to the inner peripheral edge to the outer peripheral edge of the edge.
The number and spacing of the incisions is determined by the size of the offset of the inflection
point from the resting lid, the extent to which the edge material and edge shape can absorb
circumferential stretching. (The valleys 9 are coated with a viscous material, such as a dung
agent, which is very flexible and prevents the flow of air, so as to fill the incisions. As a result, the
stretchability of the edge in the circumferential direction is increased, and due to the stretch in
the circumferential direction that the edge material itself can not absorb, the edge 3 is absorbed
by the incision 3 and the edge does not partially occur in the deformed tube. It does not generate
nonlinear distortion and abnormal sound. Thus, the linearity of the speaker reproduction sound
is improved. In addition, since the cut 3Ktlf viscous material is applied, the cut does not shortcircuit the sound pressure before and after the cone paper and the movement of the first cut
portion is visited.
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