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JPS55147898

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DESCRIPTION JPS55147898
Description 1, title of the invention
Loudspeaker cord and method of manufacturing the same
3. Detailed Description of the Invention The present invention relates to Subic-kako-7 which is
homogeneous, high in rigidity and excellent in properties, and a method of producing the same.
In the past, as a method of producing sue-kacorn. A method in which pulp dissolved in water is
cut with a wire mesh and heat-pressed with a mold for molding. (II) A method of molding a
plastic plate by directly pressing a metal plate with a mold. Describe in detail based on. 1 (al and
(b) in 1 (a) and (b), 1 is a paper making tank, 2 is raw material dissolved water dissolved in corn
raw material (paper stock) spring water. 3 is papermaking (punching metal), 4 is a drainage cock.
5 is a vacuum bond, 6 is a paper for paper making, 7a and 7b are breath molds, 8a and 8b are
heaters. That is, first, in the sand-sand process shown in FIG. 1 (a), the drainage cock 4 is opened
after thoroughly mixing. EndPage: 1 When drainage is finished, close cock 4 and operate vacuum
bond 5 to fully dehydrate, and then make papermaking paper 6 together with net 3 to deposit
paper stock 6 (see the zores process shown in bl) Move. In this process, the stock 6 taken out
with the wire mesh 3 is attached to the mold 7b, and the mold 7a is lowered and the heaters 8a
and 8b are energized to be heat-pressed. Is obtained. 2 (al and (b) show the manufacturing steps
of the above-mentioned conventional method (Ill, respectively), (a) shows before pressing and (b)
shows after pressing. These Fig. 2 fa) and (9a in bl). 9b is a press die and 10 is a raw material.
That is, the raw material 1o is press-formed by the press molds 9a and 9b, and an unnecessary
portion is cut out at the outer diameter portion of the raw material 1o to obtain a speaker cone
by K. However, it is difficult to produce a uniform speaker cone by the above-mentioned
conventional method fl), the thickness of each part and the variation of individual products are
large, and in order to increase mechanical strength, the thickness should be increased. It had to
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have the drawback of becoming heavy. Still, in the above-mentioned conventional method fill, it is
easy to narrow the thickness of the sheet-like raw material IQ by mechanical stress, so that the
thickness is not uniform, and deep drawing can not be performed with the raw material IO
having low extensibility, etc. The drawback is that the material of the raw material 10 is limited.
Furthermore, the conventional speaker cones manufactured by these conventional methods (11,
(II), etc. are bent along the generatrix direction of the cone as shown in FIG. The sound pressure
frequency characteristics and distortion characteristics have peaks as shown by the curved line
in FIG. 7 and the broken line in the mouth, and the bending is broken due to excessive input.
There was a defect such as fear of
The present invention has been made to eliminate the above-mentioned defects, and is
homogeneous, with less variation among individual products, and is lightweight, strong in
strength, without fear of breakage, and has excellent speaker cone characteristics. And it aims at
providing the manufacturing method.
Loudspeaker cord and method of manufacturing the same
The present invention will be described in detail with reference to FIGS. 4 to 7 below. FIGS. 4A
and 4B are front and side views showing an embodiment of a speaker cone according to the
present invention, in which 11 is a reinforcing bar. That is, the speaker cone of the present
invention has at least two or more, here four, radial lines extending from the center to the outer
peripheral side from the center as shown in FIG. 4 + a) of the conical surface whose top is cut off
as shown in FIG. Reinforcing bars 11 are formed on the line, each of which stands up from the
conical surface. Hereinafter, an embodiment of a method of manufacturing such a speaker cone
will be described with reference to the manufacturing process diagrams shown in FIGS. 5 and 6.
In these two figures. la) is a front view, (b) is a side view. That is, as shown in FIG. 5 fa), two or
more sheets from the center of the uniform donut plate-like sheet 12 made of paper, plastic,
cloth impregnated with thermosetting resin, metal, etc. Here, the fold line 13 is formed along
four radial lines. Next, as shown in FIG. 6 (at and fbl, the sheet 12 is bent along the bending line
13 and the bending portion 14 is bonded, and as shown in FIG. 4 al and (b), The reinforcement
bars 11 are formed to rise from the sheet surface, and are formed in a truncated conical shape at
the top to obtain a speaker cone. In addition, a homogeneous sheet of paper in view of the
current technical level. It is not difficult to manufacture plastic, thermosetting resin impregnated
cloth, metal or the like 7-to, and in the present invention, the conventional method shown in
FIGS. 1 and 2 + 11, fl [ There are few factors which make the thickness non-uniform at the time
of speaker cone molding compared with l. Therefore, according to the present invention, the one
uniform plate-like sheet is cut into a single natsu-like shape, and a predetermined number of
portions are folded and bonded to form a speaker cone which is uniform and has less product
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variation. Is easily obtained. Further, since the above-mentioned bonded portion is erected, for
example, vertically from the sheet (conical) surface to form the reinforcement bar 11, bending of
the cone in the generatrix direction and divided vibration occur, so that the curve I in FIG. And as
shown by the solid line of the mouth, there is no peak in the sound pressure frequency
characteristic and distortion factor characteristic, and the end page of fear of breakage due to
bending still against overinput: 2 provides a lightweight and strong speaker cone can do.
4. Brief description of the drawings FIGS. 1 and 2 are explanatory views of manufacturing steps
of the conventional method, and FIG. 3 is a diagram showing deflection and vibration in a
vibration system of a speaker using a conventional speaker cone, FIG. 1a) and (b) show a front
view and a side view showing an embodiment of a speaker cone according to the present
invention. FIG. 5 and FIG. 6 are manufacturing process explanatory views showing an
embodiment of a method of manufacturing a speaker cone according to the present invention,
wherein 1 is a front view, FIG. 7 (b) is a side view, and FIG. It is a characteristic curve figure
which shows an example of a sound pressure frequency characteristic and distortion rate
characteristic of a speaker which used a speaker cone by a comparison with a conventional one.
11 иии Reinforcing bar, 12 иии Donut plate-like sheet, l и и и 1 bending line, 14 иии bending part. In the
drawings, the same reference numerals indicate the same or corresponding parts. Agent Shin
Nono-Fig. 1 Fig. 2 (b) Fig. 3 Fig. 4 (b) EndPage: ?
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