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Brightening agent 1, name of the invention
Method of manufacturing an edge for a speaker diaphragm
3. Detailed Description of the Invention The present invention relates to a method of
manufacturing an edge for a speaker diaphragm. The edge for the speaker diaphragm needs to
be formed of a material having a large internal loss, in particular to prevent resonance. Among
the materials with large internal loss are, for example, plastic or plastic foam to form an edge.
Among these, there are some of the materials shown in FIG. 1 for forming plastic edges. The That
is, for example, a polyurethane foam is used as a plastic foam, and from this polyurethane foam
material, an annular edge construction piece having an inner diameter and an outer diameter of a
desired edge except the remaining portions BI and B2. Was cut, and then the edge-constituting
pieces C were heat-treated and pressurized to produce an edge. However, with this method, only
about 175 areas of the entire area of the fabric material can be taken as the edge configuration
piece C for molding the EndPage: 1 edge, and the remaining piece B as a yield, B, was wasted.
The present invention has been made in view of the above-described points, and the object of the
present invention is to minimize the generation of yield at the time of cutting an edge
component, save material, and simplify the edge. And a device for producing a speaker
diaphragm edge. Hereinafter, an embodiment of the present invention will be described
according to FIGS. 2 and 5 together with an apparatus used. In FIG. 5, 1 is an edge-forming lower
plate, 2 is an edge-forming upper die to be engaged with the edge-forming lower die 1, and the
edge-forming lower edge ff11 and the edge-forming upper case 2 are respectively at both ends of
the edge portion. The attachment part to the frame and the attachment part for fixing the
diaphragm such as cone paper etc. have a desired shape to be integrally formed. Then, in order
to form an edge by using the upper ml & f [ffi, first, as a first step, four plate-like members 3, 3
formed of a thermoplastic plastic foam, for example, polyurethane e foam; Joining the joint
slopes 4 & 4 at both ends of the shorter pair of plate members 4.4 to the joint slopes 31 L and 3
N formed inside the long plate members 3 and 3 from K Then, a substantially square frame-like
cloth material 5 having a square hole 51L at the center is formed. In this case, the bonding of the
bonding slopes 3a and 4a may be merely contact, but bonding may be performed using an
adhesive in order to ensure bonding. Then, in the second step, the cloth material 5 is cut to form
an annular edge configuration piece 5b.
Furthermore, as the third step, the edge-constituting piece 5b is accommodated in the edgeforming lower plate 1 and the edge-forming upper portion 2 and the edge-forming lower die 1
are butted by heat treatment and pressure treatment. To mold. The heating temperature in the
third step is about 190 ° C., the pressure in the pressure treatment is 3-, and the pressurization
time is about 3 seconds. According to one embodiment of the present invention, the fabric
material 5 formed by joining four plate-like members 3; 3 and 4 has a square hole 5a at the
center and the entire shape is a frame When the edge-constituting piece 5 b is cut from the fabric
material 5, the remaining piece 5 o as a yield, 50. Is much less than conventional products. In
addition, what is shown in FIG. 6 and FIG. 8 is another modification of the base material 5
'formed in the first step, and in this case, the one shown in FIG. 3 and FIG. Unlike the above,
bonding slopes 3 / a formed at the left and right ends of the four plate-like members 3 'and 3' &
are bonded to bonding slopes 371k, 37 & of plate-like members 3 'adjacent to each other. By
doing this, a frame-shaped cloth material 5 'having a square hole 57a at the center and having a
square overall shape is formed. The plate-like body 3 'is formed in a substantially trapezoidal
shape as a whole, and the joint slopes 3 / a, 37 & are formed at an angle of And at a
right angle to the upper surface or the lower surface and joined. In some cases, the corners of the
fabric 5 'are formed to be 90 °. Moreover, what is shown in FIG. 9 thru ¦ or FIG. 11 is another
hairstyle example in the case of forming cloth material 5 ", Also in this modification, four plateshaped bodies 3" of the same shape are prepared Then, by joining the end portions of the
respective plate-like members 3 '' to each other EndPage: 2, to form a frame-like fabric material 5
"having a square hole 5" a at the center and having a square overall shape. . More specifically,
one plate-like body 3 "is formed at one end thereof with a junction slope portion 3" a having a
shape that descends from top to bottom, and the other end is adjacent to the plate-like body 3 ".
By forming the junction slope 3 ′ ′ b in a shape to be joined with the junction slope 3 ′ ′ a
in a direction orthogonal to the axial length direction of the plate 3 ′ ′, the junction slope 3 ′
′ at one end contacts @ Bonding slope 3 ′ ′ of the plate 3 ′ ′ adjacent to the other side of
the bonding slope 3 ′ ′ b of the other surface, and on the other side according to the lower
surface of the bonding slope 3 ′ ′ b of the plate 3 ′ ′ Are joined. By repeating such an
operation, a frame-shaped cloth material 51 having a square shape in its entire shape having
square holes 5 ′ ′ a in the center portion is formed by using four plate-shaped members 3〃.
Incidentally, the second and subsequent steps in the case of forming the dough material 5 '; 5 "as
described above are the same as the embodiment shown in FIGS. 2 to 5, and the dough material
5 /; 5 Fabric material 5 /, yield from '5 //, 5' 01, S '02; 5110 .. 5 # O, which occurs when cutting
an edge component 5 / b; 5 // 1) from an edge to an edge. Is less than conventional products.
As described above, according to the present invention, it is possible to save the material as much
as possible by minimizing the generation of the yield when cutting the edge-constituting piece,
and to effectively form the edge by the simple steps and apparatus.
4. Brief description of the drawings FIG. 1 is a front view of a conventional edge manufacturing
method in which an edge component is cut out from a fabric material, and FIGS. 2 to 5 show an
embodiment of the present invention, Among them, the one shown in FIG. 2 is a plan view
showing an example of the fabric material, FIG. 3 is an exploded slope view in the same manner,
FIG. 4 is an enlarged slope view in the circle of FIG. 21A, and FIG. 6 to 8 show other fabric
materials constituting the present invention, and among them, FIG. 6 is a plan view, and FIG. Fig.
7 is a perspective view of a plate-like body constituting the fabric, Fig. 8M is an enlarged oblique
view in a circle B of Fig. 6, and Figs. FIG. 9 is a plan view, FIG. 10 is a front view of a plate-like
body constituting the fabric material, and FIG. It is an enlarged slope view of the circle O in Fig. 1
... edge lower mold, 2 ... edge forming sheds, 3.4; 3 ', 3 # - ... plate-like member, 3a, 4a; 3'a *
311h, 3xb- · joining inclined surface , 515 '+ 51 /. 4JH1, 5a, 5'a + 5 # a.-Jj, 5b. s'b, sub ... edge
configuration piece. Patent Assignee Pioneer Co., Ltd. Same Mogami Electric Co., Ltd. 0EndPage: