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JPH05161194

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DESCRIPTION JPH05161194
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of manufacturing an edge for a speaker used in various audio equipment and a speaker
using the same.
[0002]
2. Description of the Related Art A typical manufacturing method of a typical speaker edge and a
speaker using the same will be described with reference to the drawings.
[0003]
3 (a) to 3 (d) are manufacturing process diagrams showing a conventional method for
manufacturing an edge for a speaker, and FIG. 3 (a) shows a state in which the sheet-like edge
material raw fabric 1 is rolled in a roll shape. A large amount of cotton-based cloth or foamed
urethane obtained by coating a rubber-based resin such as SBR or NBR is often used as the edge
material raw fabric 1.
[0004]
The said edge material original fabric 1 is cut into the edge material piece 2 of a desired
magnitude | size, as shown to the figure (b), It heat-molds with a shaping | molding die (not
shown), and the figure (c) is shown. It is processed into a desired shape as shown.
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1
[0005]
The edge material piece 2 processed in this way is processed by cutting the inner diameter and
the outer diameter (not shown) to remove unnecessary portions, and after obtaining an edge 3 as
shown in FIG. The inner peripheral portion of the edge 3 is fixed to the peripheral portion of the
diaphragm with an adhesive or the like (not shown) and used for the speaker.
[0006]
However, in the above-described conventional method for manufacturing an edge for a speaker,
the edge material piece 2 of a desired size is cut from the sheet-like edge material raw fabric 1
and heat-formed to have inner and outer diameters. Since the manufacturing method is to
discard the unnecessary part after punching out and there is a lot of man-hours and material
loss, not only the part price of the part of the edge 3 becomes high, but it becomes high also as a
speaker, and further There were also many issues in terms of industrial waste and resource
saving.
[0007]
The present invention solves the above-mentioned conventional problems and aims to provide a
method for manufacturing a speaker edge capable of reducing material loss and improving
productivity and reducing costs, and a speaker using the same. It is
[0008]
SUMMARY OF THE INVENTION In order to solve the above problems, a method of
manufacturing an edge for a speaker according to the present invention and a speaker using the
same cut a porous foam resin sheet into a rectangular shape of a desired size. The ring-shaped
groove of the cross-sectional convex shape fitted into the above-mentioned ring-shaped groove of
the molding die lower mold in which the ring-shaped groove of concave cross-section is formed
in a state where respective short sides of the individual pieces are superposed The ring-shaped
edge hooked product made of a foamed resin sheet in which the overlapping portion is heatwelded is formed by inserting the protrusion of the molding die upper mold formed with the
protrusion in the mold into the groove and performing heat forming. A method of manufacturing
an edge of a speaker for forming an edge by placing a ring-shaped edge product in an edge
forming mold having a recess and a protrusion formed in a desired shape and performing heat
forming One in which the.
[0009]
[Function] With this manufacturing method, it becomes possible to manufacture an edge for a
speaker with improved production by eliminating material loss, and by using this edge for a
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speaker, it is possible to reduce the cost of the speaker .
[0010]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A method of manufacturing an
edge for a loudspeaker according to an embodiment of the present invention and a loudspeaker
using the same will be described with reference to the drawings.
[0011]
1 (a) to 1 (d) are manufacturing process diagrams showing a method of manufacturing an edge
for a speaker according to the present invention, and FIG. 1 (a) shows a state where a tape-like
edge material raw fabric 17 is wound on a roll. The edge material original sheet 17 may be a
porous foam resin sheet (for example, a urethane foam or rubber foam) or a porous foam resin
sheet impregnated or coated with a rubber resin, or the like. This edge material raw fabric 17 is
cut into edge material pieces 18 of a desired size as shown in the figure.
[0012]
Next, as shown in FIG. 6 (b), a molding die in which a ring-shaped groove having a concave crosssectional shape is formed in a state in which the edge material pieces 18 are curved and the
short sides are overlapped. The projection of the molding die upper mold 19 in which the ringshaped projection having a convex cross-sectional shape is formed so as to fit into the groove of
the lower mold 20 and fit into the groove is inserted into the groove of the molding mold lower
mold 20 As shown in FIG. 6C, the ring-shaped edge-finished product 21 made of a foamed resin
sheet is integrated by heat-welding the overlapping portions by inserting and performing heat
molding, and this edge hook-in is formed. The edge 11 as shown in FIG. 1D is formed by placing
the fitting 21 in an edge forming mold having a recess and a protrusion formed in a desired
shape and heat forming (not shown). It is a manufacturing method.
[0013]
The thickness t of the edge product 21 is thermally shrunk and thinned by heat and pressure
molding the edge material piece 18, and in the present embodiment, the edge material piece 18
having a thickness of 8 mm. Is placed in a molding die and heated and pressurized at 200 ° C.
for 10 seconds to obtain an edge hooked product 21 having a thickness of 2 mm, and this edge
hooked product 21 is further disposed in the edge molding die Then, by applying heat and
pressure at 200 to 220 ° C. for 20 seconds, an edge 11 having a thickness of 0.6 to 0.7 mm is
obtained.
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[0014]
The edge 11 manufactured in this manner has a very high material utilization rate, and it is
possible to reduce the material cost of the edge 11 by half in comparison with the conventional
example, and the productivity is further simplified. Can also contribute to the improvement of
[0015]
FIG. 2 is a half sectional view showing the configuration of a speaker using the edge 11 obtained
by the above-described method for manufacturing a speaker edge according to the present
invention, wherein a lower plate 5 having a center pole 4 and a ring magnet 6; A ring-shaped
upper plate 7 is coupled to form a magnetic circuit 8 in which a magnetic gap 13 is formed.
[0016]
The present invention has a frame 9 coupled to the upper surface of the magnetic circuit 8, and a
voice coil 14 fitted to the magnetic gap 13 at the periphery of the frame 9 and fixed to the
periphery of the diaphragm 12 coupled at the center. The above-mentioned edge 11 is fixed
together with the gasket 10.
[0017]
The peripheral edge of the damper 15 supporting the voice coil 14 is fixed to the frame 9, and
the dust cap 16 is fixed to the upper surface of the central portion of the diaphragm 12 for the
purpose of preventing foreign matter intrusion into the magnetic gap 13. It is configured.
[0018]
Since the speaker configured in this way is configured using the edge 11 obtained by the method
for manufacturing a speaker edge according to the present invention described in FIG. As it
becomes possible to reduce the cost of the entire speaker.
[0019]
As described above, according to the method of manufacturing the edge for a speaker according
to the present invention and the speaker using the same, the material for the speaker edge is
dramatically improved by eliminating the material loss, and the productivity is improved. As well
as reducing the cost of the entire speaker by lowering the unit price of the edge, it is possible to
produce excellent effects from the viewpoint of industrial waste and resource saving, and the
contribution Is a big thing.
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