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JPS5894299

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DESCRIPTION JPS5894299
[0001]
The present invention relates to a method of winding a coil portion for a flat speaker and a flat
speaker using the fill portion. In recent years, a long and slender cone portion projecting like a
semi-cylindrical shape is formed in parallel, in parallel, in a large number, integrally, and a voice
coil is * rotated on each cone portion, and a coil portion of these voice coils connected in series
There has been developed and put into practical use a flat speaker in which a plurality of rodshaped magnets are arranged in parallel and in parallel so as to be accommodated on the back of
the unit and combined with a yoke unit having a configuration arranged in parallel. This flatpanel speaker is noted for its outstanding performance, such as ultra-thin, high-power, deep bass
reproduction and full range, small size, light weight, rectangular shape, high input resistance, low
distortion, etc.) . By the way, as shown in FIG. 1, in the coil portion of the conventional flat
speaker, the voice coil 3 (shown by a dotted line) is wound independently around the bottom of
each cone 2 formed on the winding frame 1 After that, the respective coils are connected as
shown by a solid line X, and connected in series. Normally, the voice coil is not one layer (one
turn), so the same winding operation is performed on the next layer, and the winding operations
described above are sequentially performed on the voice coil of the required layer to fill the fill
portion. Form. Of course, the layers are also connected in series, and two lead wires are led out
from the coil portion. As described above, conventionally, since the voice coil is wound
independently on each cone portion and the individual voice coils are connected in series, the
winding operation is complicated, time consuming, and the workability is extremely bad. there
were. The present invention has been made to eliminate the above-mentioned drawbacks, and is
capable of simultaneously winding a voice coil having a required number of turns around each
cone of a winding frame, and providing flat winding with improved winding workability. A
winding method of a coil portion and a flat speaker using the coil portion. Hereinafter,
embodiments of the present invention will be described in detail with reference to the drawings.
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1
FIG. 2 shows a coil portion for a flat speaker formed by the method of the present invention. In
the figure, 11 represents a required number (seven for simplification in the example of the
drawing) of the required number of coils integrally formed on the winding frame 11. A shapeprojecting elongated cone portion 13 shows a voice coil of the required number of turns (the
number of layers) wound around the bottom outer layer of each of the cone portions 12. 15F and
138 are lead wires of the voice coil 13, and the voice coils are connected in series. First, the
winding method of the coil section will be described. First, the winding frame 11 shown in FIG. 2
is identified as an @ -wire machine (not shown).
Next, as shown in FIG. 3, the required p-number (four turns in the illustrated example) of voicefill preparations 1114 &, 14b, 14c, 14d are arranged on the winding frame 11. These electric!
????? 14b, 14c and 14d, as shown in FIG. Preferably, both side portions 14L and 14R are
arranged slightly outward from the outer edge of the winding frame 11. Next, for example, the
electric wire 1114R on the right side is pulled leftward in the direction indicated by the arrow R
as shown by a dotted line in FIG. In this case, the winding hand is disposed so as to pull the right
side electric wire 14R to the left between each cone portion, and of course the four turn electric
wire is simultaneously drawn. As shown in the figure 6 by drop-on, the left side 1! At the same
time, pull the wire 14L to the right in the direction indicated by the arrow, and place the wires in
a state of surrounding the outer periphery of each cone. As described above, since the voicefilling wire 14 is pulled in a state of surrounding each cone portion 12 of the winding frame 11,
both ends of each wire 1 [14a, 14b% 14c% 14d are pulled by the winding hand Sometimes you
must be in a state where you can pull out the wire with a certain tension. For this reason, in the
present embodiment, as shown in FIG. 7, a pair of bobbins 15L and 15B of the same weight (1 to
2 & 9) in which the wires are wound is prepared for each wire of each turn. In the case where
eight bobbins are prepared, the starting ends of the electric wires of both bobbins 15L and 15B
are connected and integrated so that the electric wire can be fed while giving an appropriate
tension to the pulling of the winding hand. If the winding can be performed without problems,
only one bobbin may be used, or another method may be used. Next, a winding jig having
substantially the same external shape as the cone portion 12 of the winding frame 11 is brought
into close contact with each cone portion 12, and the electric wire being pulled by the winding
prong is attached to the outer periphery of this winding jig. , Release the wire by the spring wire
hand. As a result, as shown in FIG. 8, the four turns 1111, 14b, 140, 14d are wound along the
outer periphery of the winding jig 16. Although there is a gap between the winding jig 16 and
the cone portion 12 in FIG. 8, this is for the sake of easy understanding and, in fact, they are in
close contact. Accordingly, the bottom surface of the winding jig 16 is concave. Next, the wire is
pressed and inserted into the bottom of the cone of the winding jig 16 by means of a rotary
motion brace (jig). Of course, simultaneously suppress and insert four turns of wire.
Next, the wires of each turn are connected in series. That is, the end of the electric wire 14a of
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the first turn is connected to the start end of the electric wire 1114b of the second turn, the end
of the electric wire 14b of the second turn is connected to the start end of the sixth turn electric
charge 1114c, and the electric charge 1114 c of the third turn End of and the fourth turn of
electricity! Connect the start end of + 14d, and the start end of the first turn 4114a and the
fourth turn 1114 (! The end of this is the voice fill lead-out lead 13F, 158. Thus, the wires are
connected in series. In this case, it is preferable to shift the connection portion of the wire
between the turns little by little as shown in FIG. Next, after heating and fixing wfi [to the outer
periphery of the bottom of the cone portion, the winding frame 11 is removed from the winding
machine. Thus, the fill portion shown in FIG. 2 is formed. Since the winding frame 11 is usually
formed of a polycarbonate material, the wire can be easily fixed to the cone by heating. FIG. 10 is
a schematic lIr-diagram of the filled portion shown in FIG. In the case of using a flat aluminum
wire as a wire for voice filling, the aluminum wire ? insulating layer-aluminum wire ? insulating
layer ? aluminum wire иии are sequentially laminated and wound. FIG. 11 shows a cross-sectional
view of a coil portion when an Al flat wire is used. Although this figure shows the case of four
layers, for example, in the case of winding in eight layers, there is a problem of spacing of the
cone, so four layers of laminated windings are wound in parallel to the windings of FIG. Will take
the configuration to In the above embodiment, the winding jig is set on the winding frame after
the electric wire is pulled left and right by the winding hand, but after the winding jig is set on
the winding frame, the winding hand is set by the winding hand The wire may be pulled to both
sides and attached to the outer periphery of the winding jig. FIG. 12 is a perspective view
showing an example of a yoke portion used for a flat speaker according to the present invention,
and in the figure, 21 shows a rectangular common electrode plate of pure iron; Ferrite
(anisotropic) magnets 22 of the same number as the cone W 612 are arranged in parallel, and
pole pieces 26 of pure iron are attached to the top of each of the seven elite magnets 22. The
pole piece 25 and the ferrite magnet 22 are selected to be accommodated in the inside of the
cone portion of the coil portion, and the ferrite magnet 22 is a magnet in which the magnetic
pole on the common electrode plate 21 and the magnetic pole of the pole piece 22 @ are
adjacent The two magnets are magnetized so as to be opposite to each other.
The fill portion shown in FIG. 2 is put on the above-described yo text portion and attached to a
predetermined speaker frame to constitute a flat speaker according to the present invention. FIG.
13 shows the magnetic circuit of the flat loudspeaker according to the present invention. As
described above, according to the present invention, the wire for voice filling can be wound
around the bottom of the bottom of the cone of the filling at one time regardless of what turn
(what wj), and moreover, the wire between the respective cones Since it is not necessary to
connect them, the winding workability is greatly improved. Further, since the wire is pulled to
both sides by the winding hand and wound around each cone of the fill portion through the
winding jig, the winding can be automated and mass production can be performed. Therefore,
there is a remarkable advantage that a high-performance, small, lightweight flat speaker can be
manufactured inexpensively. The above embodiments are for illustrating the present invention,
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and therefore, it is needless to say that various modifications and changes can be made as
needed.
[0002]
Brief description of the drawings
[0003]
11th!
1 is a schematic plan view for explaining a conventional winding method of a coil portion for flat
speaker, FIG. 2 is a schematic perspective view showing an example of a coil crane for flat
speaker manufactured by the method of the present invention, FIG. FIGS. 9A and 9B are for
explaining one embodiment of a winding method of a fill portion for a flat speaker according to
the present invention, and FIG. 3 is a perspective view showing an arrangement of electric wires
for voice coil, and FIG. Rough outline 1wI showing arrangement relationship between coil wire
and winding frame! ! ! , FIG. 5 and FIG. 6 are schematic plan views showing a state in which the
voice coil wire is pulled to the left and right by the winding hand, FIG. 7 v! J is a drawing showing
a bobbin for feeding out the electric wire, FIG. 8 is a schematic 11 hio drawing showing a state in
which the electric wire for voice coil is mounted on a winding jig, and FIG. 9 is each electric wire
for voice coil wound on a cone part 10 is a cross-sectional view of a portion of the coil portion,
FIG. 11 is a cross-sectional view of a portion of the coil portion when an aluminum flat wire is
used as a voice coil wire, and FIG. FIG. 13 is a schematic circuit diagram showing an example of
the yoke portion of the flat speaker according to the present invention, and FIG. 13 is a magnetic
circuit diagram of the flat speaker according to the present invention. 11: Reel, 12: Cone, 16:
voice fill, 14: wire for voice fill, 16: winding jig, 21: common pole piece of pure iron, 22: ferrite
magnet, 23: pole piece of pure iron , Patent Assignee Electro Acoustics Ltd. Ola! 11 years old 2vst
5 figures t7t 6 figures 8 figures) 1t 9 figures 10 figures tll age 12 fill
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