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DESCRIPTION JP2000041296

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DESCRIPTION JP2000041296
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
damper which is a component of a speaker used as various audio equipment, more specifically to
a speaker damper having a tinsel wire integrally mounted on the surface thereof and a method of
manufacturing the same About.
[0002]
2. Description of the Related Art Generally, a voice coil of a speaker is vibratably supported via a
damper.
[0003]
Further, since the lead wire of the voice coil and the input terminal of the speaker are connected
by a tinsel wire, and the tinsel wire is usually disposed in the space between the diaphragm and
the damper, it is shaken during operation. There is a problem such as abnormal noise generated
by moving to hit the diaphragm and damper, and this tendency becomes more remarkable as the
miniaturization and thinning of the speaker progress.
[0004]
[0004] In order to solve this problem, recently, one in which a tinsel wire is attached to and
integrated with a damper by means such as adhesion or sewing is provided.
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[0005]
As this prior example, for example, JP-A-2-134100 is available.
The speaker damper has a configuration in which a conductive member corresponding to a tinsel
cord is sewn on a damper material.
[0006]
Another prior example is JP-Hei 4-71099.
In this prior art, a lightweight foam made of urethane-based foamed resin is adhered and fixed to
a damper, and a tinsel cord is attached to the lightweight foam.
[0007]
However, in the former Japanese Patent Application Laid-Open No. 2-134100, a conductive
member is sewn using an sewing machine and a thread from the inner periphery to the outer
periphery along the shape of the corrugation. As a result, the task is complicated, the
productivity is poor, and the follow-up property at the time of operation is poor.
[0008]
Further, in the latter Japanese Utility Model Application Laid-Open No. 4-71099, since the
process of bonding a lightweight foam to a damper and the process of attaching a tinsel cord on
a lightweight foam are required, the operation is complicated. Since the lightweight foam is
stacked and mounted on the pile of the corrugation of the damper, the thickness of this portion is
greatly increased, and there is a problem that the needs for thinning the speaker can not be met.
[0009]
The present invention has been proposed in view of the above, and an object thereof is a damper
for a tinsel wire attachment speaker, which is easy to manufacture, is excellent in following
capability, and is also suitable for thinning a speaker. And providing a method of manufacturing
the same.
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[0010]
SUMMARY OF THE INVENTION According to the present invention, the shape of the corrugation
2 is formed on one surface a of a damper main body 1A in which a plurality of concentric
corrugations 2 are provided by thermoforming a cloth base material. In the speaker damper
mounted with a tinsel wire in a direction connecting the outer peripheral end 3 and the inner
peripheral end 4 of the damper main body 1A, the tinsel wire is made of a circular knitting tinsel
wire 5, and with the damper main body 1A The above-described object is achieved by integrating
the belt-like polyurethane 6 provided between it and the circular knitting tinsel wire 5 by thermal
fusion.
[0011]
In the case of a tinsel wire, a copper foil obtained by rolling a copper wire having a diameter of
0.10 mm or less to a diameter of 1/4 or less is wound around a center yarn No. 40 of single yarn
or 2-twist meta-aramid fiber. By using 4 to 16 unit cocoon wire, weaving pitch of 15.2 ± 0.76
mm / times, and using circular knitting cocoon wire 5 having a circular knitting structure in
which the cocoon filament is less likely to be damaged when heated and pressurized , To achieve
the above purpose.
[0012]
In addition, the tinsel wire is formed by winding a copper foil in which a copper wire with a bus
diameter of 0.10 mm or less is smaller than 1/4 of the wire diameter around a center yarn No. A
structure in which 1 or more of nylon yarns are gathered from 4 to 16 unit yarn lines, and the
weave pitch is 15.2 ± 0.76 mm / time, so that the winding lines are not damaged when heated
and pressurized The above-mentioned object is achieved by using a circular knitted silk thread
wire (5) which is a circular knitted yarn.
[0013]
Further, in the above speaker damper, after a cloth base material is impregnated with a
thermosetting resin such as phenol resin, it is placed on one of the molds, and a strip of
polyurethane 6 is placed on the cloth base material. The circular corrugation 2 is then placed by
placing the circular braided winding wire 5 along the longitudinal direction on the strip-like
polyurethane 6, pressing down the other mold and heating and pressing it. At the same time as
forming the damper main body 1A, it is manufactured by integrating the circular knitted filament
wire 5 with the damper main body 1A by fusion bonding of the polyurethane 6, and as the
polyurethane 6 used in this case, soft polyurethane foam is used. It has a feature.
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[0014]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of a first
embodiment of a speaker damper according to the present invention.
The damper 1 has a ring shape, and is formed on the one surface a of the damper main body 1A
on which a plurality of concentric corrugations 2 are formed, along the shape of the corrugated
corrugation 2 to form the outer peripheral end 3 of the damper main body 1A. A pair of circular
knitted tinsel cords 5 are arranged via a strip of polyurethane 6 from the inner circumferential
end 4 to the polyurethane 6, and the polyurethane 6 is made of a flexible polyurethane foam, and
the circular knitting tinsel cord 5 and the damper main body 1A are integrated by fusion. It is
done.
That is, they are integrated at the time of forming the damper, and both the polyurethane 6 and
the circular knitting tinsel wire 5 are in close contact with the damper main body 1A in a form
along the unevenness of the corrugation.
[0015]
As this damper base material, a woven fabric made of cotton fiber, acrylic fiber, polyester fiber,
aramid fiber or the like alone or mixed is used.
[0016]
The flexible polyurethane foam is used as the polyurethane 6 because the soft polyurethane foam
is soft in material, has good matching with the cloth material, and does not impair the
followability, and is fused by thermoforming This is because the round knitting tinsel wire 5 can
be firmly integrated with the damper main body 1A, and molding is easy.
[0017]
Further, as the circular knitted tinsel wire 5, copper obtained by rolling a copper wire having a
diameter of 0.10 m or less to a central diameter of not more than 0.10 m to a central yarn No. 40
singlet or a two-twisted meta-aramid fiber 4 to 16 unit winding wire wound with foil is
assembled, the weaving pitch is 15.2 ± 0.76 mm / times, and circular knitting of a structure that
does not easily cause damage to the winding yarn when heating and pressing is used. .
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[0018]
That is, a conventional round braided filament wire is, for example, a unit filament wire 12 in
which a copper foil formed by rolling a copper wire having a diameter of about 0.10 mm around
a center yarn of two 40-piece twisted meta-aramid fibers is wound. The book is constructed by
knitting a book at a pitch of about 8.5 mm / times, which has a problem of damaging the winding
wire during heating and pressing because the pitch of the braid is dense, and If the mold
clearance is made large to prevent the problem, the adhesive strength after fusion can not be
obtained sufficiently, or the desired damper characteristics can not be obtained.
[0019]
On the other hand, in the present invention, a special round knitting tinsel wire 5 in which unit
tinsel yarns are knitted at a coarse pitch is used.
[0020]
That is, as described above, the cocoon wire according to the present invention is composed of a
central No. 40 single-filament yarn or a two-twisted meta-aramid fiber with a copper wire having
a bus diameter of 0.10 mm or less at 1/4 of the wire diameter. 4 to 16 unit cocoon wire wound
with copper foil rolled below was assembled, the weave pitch was 15.2 ± 0.76 mm / turn, and it
was made a circular knit of a structure that does not easily damage the cocoon cocoon during
heating and pressing The use of a round knitting twill wire (5) and coarser weave pitch makes it
difficult to break during pressing, easy to crush, and flat and thin in diameter. The adhesion
between the mold gap and the damper cloth is improved, and the shape of the corrugation 2 is
stabilized and the performance of the damper 1 is not impaired.
Furthermore, since the bending performance by vibration will improve if the thickness of the
round knitting tinsel wire 5 is thin, the durability is also improved.
[0021]
As described above, since this circular knitting tinsel wire 5 adopts a structure that makes the
weaving pitch coarser, squeezable and thinner than those conventionally used, it is rich in
flexibility and has damper performance. Good performance can be obtained without losing the
[0022]
In the first embodiment, the pair of circular knitting tinsel wires 5 are provided in series in the
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diameter direction from one end to the other end of the outer periphery of the ring-shaped
damper main body 1A as shown in FIG. Along with this, a pair of belt-like polyurethanes 6 are
similarly provided in the diameter direction.
[0023]
The reason why they are provided in series in the diametrical direction is that they have high
productivity and good vibration balance.
[0024]
However, in actual use, except for some special examples, any one of the inner peripheral end 4
of the opening 7 of the damper main body 1A extends toward the outer peripheral end 3 of the
damper main body 1A. The one on the radius side is used.
[0025]
That is, FIG. 2 shows a perspective view of one usage example in which each of the round braided
tinsel cords 5 is connected to each of the terminal connection portions 13 of the terminal plate
12, and shows an example where the left radial portion side is used.
[0026]
In FIG. 2, the peripheral edge portion of the opening 7 inside the damper main body 1A, that is,
the inner peripheral end 4 of the damper main body 1A, is bonded to the outer peripheral
portion of the cylindrical bobbin 10 via an adhesive.
Further, the inner end portions of the respective round braided tinsel wires 5 provided on one of
the radial portion sides are electrically connected to lead wires (not shown) at the beginning and
end of the winding of the voice coil 11, respectively.
[0027]
The outer end portion of the circular knitting and winding wire 5 is connected to the terminal
connection portion 13 of the terminal plate 12.
[0028]
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As is well known, the terminal plate 12 is provided with an insulating lug plate 14 having a
substantially rectangular shape and a pair of terminals 13a provided on the lug plate 14, and the
terminal plate 12 constitutes a speaker. Is fixed to a frame (not shown).
[0029]
A vibration plate (not shown) is connected to the bobbin 10, and the outer peripheral portion of
the damper main body 1A is connected to the frame.
[0030]
Next, a method of manufacturing the damper main body 1A having the above configuration will
be described.
[0031]
First, a cloth base material of a predetermined shape made of cloth such as cotton fiber is
impregnated with a thermosetting resin such as phenol resin.
Thereafter, each is placed on one of the molds (not shown), and a strip of polyurethane 6 is
placed on the cloth substrate, and a pair of strips are further placed on the strip of polyurethane
6 along the longitudinal direction. The damper body 1A having the concentric corrugations 2 is
formed by placing the circular knitting tinsel wire 5 and pressing the other mold (not shown) to
form the damper main body 1A having the concentric corrugations 2, and at the same time, melt
the polyurethane 6 By wearing, it is possible to easily integrate the circular knitted filament wire
5 into the damper main body 1A, and the damper 1 according to the present invention described
above can be manufactured.
[0032]
As an application of the above-described embodiment, the adhesion strength and durability of the
tinsel wire can be improved by mixing nylon yarn in the tinsel wire.
[0033]
That is, in this case, the cocoon wire in this case is a copper wire in which a copper wire with a
bus diameter of 0.10 mm or less is coated to 1/4 or less of the wire diameter to the center yarn
No. Assemble one or more nylon yarns out of 4 to 16 unit yarn wire wound with foil, and make
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the weave pitch 15.2 ± 0.76 mm / time, and damage to the yarn during heating and pressing It
has a circular knit structure that is a circular knit with no structure.
[0034]
According to this method, the nylon yarn melts and does not easily cause damage to the cocoon
wire during heat and pressure molding, and the cohesion between the cocoon wire and cocoon
wire and polyurethane 6 occurs because the nylon yarn fuses as a binder. The bonding state
becomes strong and the durability improves.
[0035]
FIG. 3 shows a perspective view of a second embodiment of the present invention.
[0036]
This embodiment is characterized in that the belt-like polyurethane 6 and the pair of circular
knitting tinsel wires 5 are provided only on one radial portion side of one surface a of the ringlike damper main body 1A. There is.
[0037]
In this case, as compared with the first embodiment, the materials of polyurethane 6 and circular
knitting tinsel wire 5 can be reduced to half, so that the material cost can be saved accordingly.
[0038]
The other structure and manufacturing method are basically the same as in the first embodiment.
[0039]
FIG. 4 shows a perspective view of a third embodiment of the present invention.
[0040]
In this embodiment, in order to correspond to the shape of the terminal plate etc., a strip of
polyurethane 6 and a pair of circular knitting tinsel wires 5 are formed from the inner peripheral
edge 4 at the radius of one surface a of the damper main body 1A. It is characterized in that it is
provided so as to extend substantially in a V-shape toward the outer peripheral end 3.
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[0041]
The other structure is the same as that of the first embodiment.
[0042]
As described above, according to the present invention, it is not necessary to sew the circular
knitting tinsel wire 5 on the damper main body 1A one by one, and since it can be integrated
with the damper main body 1A via the polyurethane 6, manufacturing is easy. Also, since the
weave pitches of the wires are roughly gathered, breakage is unlikely to occur at the time of
pressure processing, and the deformability and adhesion are good, and also from this aspect, the
manufacturability is excellent.
[0043]
Further, since the circular knitting tinsel wire 5 of the present invention is easily deformed at the
time of heat and pressure forming and has good adhesion to the damper main body, it is
provided on the damper main body 1A along the shape of the corrugation 2. Thus, it is possible
to obtain the damper 1 which is excellent in the followability and suitable for thinning the
speaker.
[0044]
Brief description of the drawings
[0045]
1 shows a perspective view of a first embodiment of the present invention.
[0046]
2 shows a state in which the first embodiment of the present invention is connected to a terminal
board.
[0047]
3 shows a plan view of a second embodiment of the present invention.
[0048]
4 shows a plan view of a third embodiment of the present invention.
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[0049]
Explanation of sign
[0050]
DESCRIPTION OF SYMBOLS 1 Damper 1A Damper main body 2 Corrugation 3 Outer peripheral
end 4 Inner peripheral end 5 Round knitting tinsel wire 6 Polyurethane 7 Opening 10 Bobbin 11
Voice coil 12 Terminal board 13 Terminal connection part 13a Terminal 14 Lug board a One
side
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