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JPH05260594

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH05260594
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker in which a coil end of a voice coil is electrically connected to a conductor woven into a
diaphragm.
[0002]
2. Description of the Related Art In recent years, dome speakers have been widely used in hi-fi
speaker systems. This is also because the diaphragm forming technology has been improved, but
it is characterized in that even if the conversion efficiency is not so good, the reproduction band
is wide and directivity characteristics, transient characteristics, sound quality, etc. are good. In
addition, dome speakers are often used as mid-tone or high-tone speakers in multi-way speaker
systems because they are difficult to manufacture in a large size due to their structure and good
directional characteristics.
[0003]
FIG. 1 shows a general structure of a dome speaker. As shown in the figure, on the lower surface
of the back plate 2 having the center pole 1, a back chamber 4 for accommodating a sound
absorbing material 3 made of glass wool or the like is fixed. The back chamber 4 is used for a
speaker for medium sound where the lowest resonance frequency has to be set relatively low.
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1
[0004]
A ring-shaped magnet 5 is fixed to the upper surface of the back plate 2. A ring-shaped top plate
6 is fixed to the upper surface of the magnet 5. A ring-shaped packing 7 is fixed to the top
surface of the top plate 6. The peripheral portion 8a of the equalizer 8 is fixed on the upper
surface of the packing 7 to flatten the high-pitched characteristics of the speaker.
[0005]
In a gap formed between the center pole 1 and the top plate 6, a voice coil 10 wound around a
coil bobbin 9 is disposed. A dome-shaped diaphragm 11 is fixed to the periphery of the coil
bobbin 9. The diaphragm 11 is generally spherical in order to increase its strength. The
diaphragm 11 is attached to the packing 7 in a freely vibrating manner via the edge 12.
[0006]
The start 10a and the end 10b of the voice coil 10 in the above dome speaker are, for example,
drawn along the outer peripheral portion of the diaphragm 11 as shown in FIG. 2 and soldered to
input terminals (not shown).
[0007]
Further, as shown in FIG. 3, an insulating member is attached to the side surface of the coil
bobbin 9, and the start 10a and the end 10b of the coil and one end of the lead wire 13 are
soldered on this surface. The end is soldered to the input terminal not shown.
[0008]
However, in the method of drawing out the start 10a and the end 10b of the conventional voice
coil 10 shown in FIG. 2 described above along the outer periphery of the diaphragm 11 and
soldering it to the input terminal, While soldering and assembly of parts are easy, the start 10a
and the end 10b of the voice coil 10 may be disconnected due to vibration due to being drawn to
the input terminal.
[0009]
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2
On the other hand, in the method of connecting to the input terminal through the lead wire 13 as
shown in FIG. 3, there is no risk of disconnection compared to that of FIG. 2, but the coil bobbin 9
is between the center pole 1 and the top plate 6 Since the coil bobbin 9 vibrates in the gap, it is
disposed in the very narrow gap of the formed space, and the soldering point between the start
end 10 a and the end end 10 b of the voice coil 10 and the end of the lead wire 13 Is very likely
to abut the center pole 1 or the top plate 6.
[0010]
From such a thing, while it is necessary to perform appropriate soldering while minimizing the
amount of soldering and the amount of swelling of the solder at the connection location, not only
the skill is required but also many work processes are deteriorated. There is a defect that
[0011]
In addition, the coil bobbin is so sufficiently separated from the gap formed between the center
pole 1 and the top plate 6 that the soldering portion between the start end 10 a and the end end
10 b of the voice coil 10 and the end of the lead wire 13 is sufficiently separated. In some cases,
the dimension in the axial direction of 9 may be longer, and in such a case, the weight of the coil
bobbin 9 is increased, and the vibration characteristic of the coil bobbin 9 and the voice coil 10 is
deteriorated. There is also a problem that the growth of
[0012]
The present invention has been made in view of such circumstances, and it is an object of the
present invention to provide a speaker capable of reliably preventing disconnection of voice coil
and deterioration of sound quality while improving workability with a simple configuration. To
aim.
[0013]
SUMMARY OF THE INVENTION In order to achieve the above object, the loudspeaker of the
present invention is characterized in that a conductor for connecting a voice coil is woven into a
diaphragm.
[0014]
In the speaker according to the present invention, since the voice coil and the input terminal can
be connected, for example, by connecting the start and end of the voice coil to the conductor
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woven into the diaphragm, the soldering workability of these can be improved. It will be
extremely easy.
In addition, since the diaphragm and the coil bobbin perform the same vibration, the relative
position between the diaphragm and the voice coil is kept constant, so that an unreasonable
force is not applied to the connection point of the start and end of the voice coil.
Furthermore, since the connection point at the start and end of the voice coil is on the diaphragm
side, the coil bobbin can be made smaller, and the weight of the coil bobbin can be reduced, so
that the vibration characteristics can be improved.
[0015]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be
described in detail with reference to the drawings.
In the drawings to be described below, the same reference numerals are given to parts common
to FIG. 1 and FIG.
[0016]
FIG. 4 shows an embodiment in the case where the loudspeaker of the present invention is
applied to a dome loudspeaker, and the dome portion 11D and the outer circumferential portion
11E are formed by the diaphragm 11 being embossed in a dome shape. ing.
As a base material of the diaphragm 11, as shown in FIGS. 5 and 6, conductor groups 11B and
11C are woven into a woven fabric 11A in which non-conductive fibers 11a are woven.
Each wire group 11B, 11C is composed of single wires 11b1, 11b2, 11b3 and 11c1, 11c2, 11c3.
[0017]
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Each wire group 11B, 11C weaves single wires 11b1, 11b2, 11b3 and 11c1, 11c2, 11c3 in
parallel to a woven fabric 11A in which non-conductive fibers 11a are woven, and at this time,
each wire group 11B, 11C is separated by a predetermined distance Keep away.
[0018]
Then, the connection method of the voice coil 10 and the input terminal 14 mentioned later is
demonstrated using FIG.7 and FIG.8.
[0019]
First, when the start end 10a and the end 10b of the voice coil 10 are connected to the wire
groups 11B and 11C, the start 10a and the end 10b are pulled out to the inside of the dome 11D
of the diaphragm 11, and the start 10a And the terminal end 10b is soldered to the wire group
11B or 11C, respectively.
In this example, the soldering points P 1 and P 2 to the diaphragm 11 are positioned along the
center line S of the diaphragm 11.
[0020]
Next, the end of the input terminal 14 is connected to the drawn out portion of each of the
conductor groups 11B and 11C of the outer peripheral portion 11E of the diaphragm 11.
Thus, the voice coil 10 is connected to the input terminal 14 through the conductor groups 11B
and 11C.
[0021]
As described above, in this embodiment, the leading end 10a and the trailing end 10b of the
voice coil 10 are connected to the conductor groups 11B and 11C woven into the diaphragm 11,
and the conductor groups 11B and 11B of the outer peripheral portion 11E of the diaphragm 11
are connected. Since the end portion of the input terminal 14 is connected to the drawn-out
portion of 11 C, there is nothing that hinders each soldering. Therefore, the soldering workability
can be performed extremely easily.
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[0022]
Further, since the diaphragm 11 and the coil bobbin 9 perform the same vibration, the relative
position between the diaphragm 11 and the voice coil 10 can be kept constant, and the soldering
point of the start end 10a and the end end 10b of the voice coil 10 No excessive force is applied
to P1 and P2.
Furthermore, since the soldering points P1 and P2 of the start end 10a and the end end 10b of
the voice coil 10 are on the side of the diaphragm 11, the coil bobbin 9 can be made smaller and
the weight of the coil bobbin 9 is reduced. The characteristics can be improved.
[0023]
Furthermore, since the end of the input terminal 14 is directly attached to the outer peripheral
edge 11E of the diaphragm 11, it is not necessary to draw the starting end 10a and the end 10b
of the voice coil 10 as in the prior art. Besides, the leader 13 is not required.
[0024]
Further, since the soldering of the voice coil 10 and the input terminal 14 to the diaphragm 11 is
performed at the inner side of the dome portion 11D and at the edge portion of the outer
peripheral portion 11E, there is nothing that hinders the respective soldering. , It becomes
possible to do soldering by automatic assembly.
[0025]
FIG. 9 shows another embodiment in which the soldering points P1 and P2 of the start end 10a
and the end end 10b of the voice coil 10 of FIG. 8 are changed, and in this example, the soldering
points P3 and P4 The diaphragm 11 is disposed to the left of the center line S of the diaphragm
11.
Not limited to this example, the soldering points P3 and P4 may be disposed to the right of the
center line S of the diaphragm 11.
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[0026]
FIG. 10 shows still another embodiment in the case where the soldering points P3 and P4 in FIG.
9 are changed. In this example, the soldering points P5 and P6 are the center point of the center
line S of the diaphragm 11. It is disposed at a position that is rotationally symmetrical with
respect to.
[0027]
As described above, by providing variations in the soldering portion to the diaphragm 11, it is
possible to greatly ease the restriction on the extraction state of the start end 10a and the end
end 10b of the voice coil 10.
[0028]
As described above, according to the speaker of the present invention, the voice coil can be
connected to the input terminal by connecting the start and end of the voice coil to the conductor
woven into the diaphragm. Therefore, their soldering workability becomes extremely easy.
In addition, since the diaphragm and the coil bobbin perform the same vibration, the relative
position between the diaphragm and the voice coil is kept constant, so that an unreasonable
force is not applied to the connection point of the start and end of the voice coil.
Furthermore, since the connection point at the start and end of the voice coil is on the diaphragm
side, the coil bobbin can be made smaller, and the weight of the coil bobbin can be reduced, so
that the vibration characteristics can be improved.
[0029]
As a result, workability can be improved with a simple configuration, and disconnection of the
voice coil and deterioration of the sound quality can be reliably prevented.
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