JPH1023593

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DESCRIPTION JPH1023593
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used for various audio devices.
[0002]
2. Description of the Related Art A conventional speaker will be described with reference to FIGS.
[0003]
FIG. 5 is a half sectional view of a conventional speaker, and FIG. 6 is a perspective view of a
state in which a tinsel wire is connected to a wire wound around a coil bobbin.
[0004]
In the figure, reference numeral 2 denotes a ring-shaped magnet held by an upper plate 1 and a
lower plate 3 having a center pole, which constitute a magnetic circuit 4.
[0005]
A frame 5 is coupled to the upper surface of the magnetic circuit 4, and an edge 7 coupled to the
outer periphery of the cone-shaped diaphragm 6 is coupled to the peripheral portion of the
frame 5. The coil 8 is coupled, the middle part of the voice coil 8 is supported by the damper 9,
the lower part of the coil bobbin is fitted into the magnetic gap 10 formed in the magnetic circuit
4 without eccentricity, The dust cap 11 is stuck on the.
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[0006]
Further, one end of a tinsel wire 12 for transmitting an electric signal is connected to and drawn
out from the start end 8a of the wire wound around the coil bobbin, and the other end of the
tinsel wire 12 is connected to the frame 5 Each of the terminals 13 is configured to be connected
to one another.
[0007]
However, in such a conventional speaker, the connecting portions 14 of the tinsel cord 12 and
the voice coil 8 are respectively connected to the initial end 8a of the wire wound around the coil
bobbin. Since the adhesive was fixed at one point, variations in adhesive strength occur, and
there is a possibility that the tinsel cord 12 peels off from the voice coil 8 when the speaker is
operated.
[0008]
The present invention is intended to solve the above-mentioned problems, and it is an object of
the present invention to provide a speaker of excellent performance in which peeling due to
variation in adhesive strength of a bonding portion of tinsel cords fixed to a voice coil is
prevented.
[0009]
SUMMARY OF THE INVENTION In order to solve this problem, in the loudspeaker according to
the present invention, tinsel cords are respectively joined to the beginning and the end of a coil
wound around a coil bobbin, and the coil bobbins corresponding to these joint portions are cut. A
notch is provided, and a tinsel wire is sandwiched and fixed to this portion.
[0010]
With this configuration, the junction of the wire ring of the voice coil and the tinsel wire is
nipped by the notch of the coil bobbin, so the notch of the coil bobbin reliably holds the junction,
and the joint portion of the tinsel wire fixed to the voice coil It is possible to prevent the peeling
due to the variation of the adhesive strength.
[0011]
The voice coil according to claim 1 of the present invention has a frame coupled to the upper
surface of a magnetic circuit having a magnetic gap formed therein, and is engaged with the
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magnetic gap at the periphery of the frame. The peripheral edge of the diaphragm coupled at the
center is joined, and a tinsel wire is joined to the start and the end of the wire ring wound around
the coil bobbin of this voice coil, and this joint portion or its vicinity is a notch of the coil bobbin
The other end of the tinsel wire is connected to a terminal connected to the frame, and the other
end of the tinsel wire is held in a notch and securely held to prevent peeling of the joint portion.
[0012]
According to the second aspect of the present invention, the cut portion is provided in place of
the notch portion according to the first aspect, and the tinsel wire is fixed by penetrating the
tinsel wire, and by securely fixing the tinsel wire in the cut portion. It holds the tinsel wire.
[0013]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1
to 4B.
(First Embodiment) FIG. 1 is a half sectional front view of a speaker according to an embodiment
of the present invention, FIG. 2 (a) is a perspective view of a voice coil as an essential part, and
FIG. It is a perspective view in the state where it connected to the wire which wound the same
coiled wire on the coil bobbin of voice coil.
[0014]
According to the figure, 15 is a ring-shaped upper plate made of iron, 16 is a ring-shaped magnet
in the same manner, 17 is a lower plate made of iron having a center pole, and constitutes a
magnetic circuit 18 having a magnetic gap 22 formed of these. doing.
[0015]
The bottom of the frame 19 is coupled to the upper surface of the magnetic circuit 18, and an
edge 21 coupled to the outer periphery of the cone-shaped diaphragm 20 is coupled to the
peripheral edge of the frame 19. A voice coil 23 which fits into the magnetic gap 22 is coupled to
the above, and a middle portion of the voice coil 23 is supported by a damper 30.
[0016]
In addition, the starting and ending points 23a of the wire wound around the coil bobbin of the
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voice coil 23 respectively join one end of the tinsel wire 24 and sandwich the joint portion in the
notched portion 25 of the coil bobbin and adhere with adhesive. The other ends of the wires 24
are respectively connected to the terminals 26 coupled to the frame 19, and a dust cap 27 is
attached to the upper surface of the central portion of the diaphragm 20.
[0017]
As described above, according to the present embodiment, notches 25 are provided in each of
the joint portions of the tinsel wire 24 of the coil bobbin of the voice coil 23, and the tinsel wire
24 is sandwiched in this portion. The wire 24 can be held by the notched portion 25 and further
fixed by the adhesive 28, and the variation in the bonding strength between the voice coil 23 and
the tinsel wire 24 can be suppressed, and the bonding strength can be improved. is there.
[0018]
(Second Embodiment) FIG. 3 is a half sectional front view of a speaker according to another
embodiment, FIG. 4 (a) is a perspective view of a voice coil as a main part, and FIG. 4 (b) is a
voice coil of the same tinsel cord. The same parts as in the first embodiment will be assigned the
same reference numerals, and the description thereof will be omitted and only differences will be
described. In place of the notch 25 of the coil bobbin of the coil 23, a cut portion 29 is provided,
and the tinsel wire 24 is penetrated and fixed with an adhesive 28.
[0019]
With this configuration, the junction between the wire ring of the voice coil 23 and the tinsel
wire 24 or the vicinity thereof is protected by the tunnel formed by the notches 29. Therefore,
the variation in the bonding strength between the voice coil 23 and the tinsel wire 24 Further,
the bonding strength can be further improved.
[0020]
As described above, according to the present invention, notches are respectively formed in the
coil bobbins of the voice coil at the joint portions of the wire ring of the voice coil and the tinsel
wire, and the tinsel wire is sandwiched and fixed to this portion. Thus, the bonding strength
between the voice coil and the tinsel wire can be improved.
[0021]
Brief description of the drawings
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[0022]
1 is a half sectional front view of a speaker according to an embodiment of the present invention
[0023]
Fig.2 (a) The perspective view of the voice coil which is the principal part
[0024]
Fig. 3 A half sectional front view of another embodiment of the present invention
[0025]
Fig. 4 (a) A perspective view of the voice coil which is the main part
[0026]
Fig. 5 Half-sectional front view of the conventional speaker
[0027]
Fig. 6 A perspective view of the same winding wire connected to a wire wound around a coil
bobbin of a voice coil
[0028]
Explanation of sign
[0029]
18 Magnetic circuit 19 Frame 20 Diaphragm 22 Magnetic gap 23 Voice coil 23a End of start and
end 24 of wire ring of voice coil 24 Tin wire 25 Notched portion 29 Notched portion
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