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DESCRIPTION JPS60180300

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DESCRIPTION JPS60180300
[0001]
TECHNICAL FIELD The present invention relates to a speaker, and in particular, in a tweeter or
the like having no damper, a structure for preventing a short circuit between a lead wire and a
top plate can be implemented inexpensively. The configuration of the conventional example and
the problems thereof will be described below. FIG. 1 is a cross-sectional view of a conventional
speaker, and a tweeter having a flat diaphragm will be described as an example of this
conventional example. 1 is a flat diaphragm adhered to voice coil 2; 3 is an edge supporting flat
diaphragm 2; 4 is an arrow attached to the outer periphery of edge 3; 5 is a plastic frame to
which arrow 4 is fixed; Is a lead wire drawn out from the voice coil 1, 7 is a top plate fixed to the
plastic frame 6 and facing the voice coil 1, 8 magnets adhered to the top plate 7, 9 is a bottom
plate bonded to the magnet 8 The end of the wire 6 is a terminal terminal. The operation of the
conventional speaker configured as described above will be described below. First, an electric
signal applied via the terminal 10 and the lead wire 6 to the voice coil 1 located in the gap of the
so-called field section constituted by the top play 1 and 7, the magnet 8 and the bottom play 1
and 9. The voice coil 1 vibrates up and down. Since this vibration is transmitted to the flat
diaphragm 2 supported by the edge 3, a sound is generated. However, in the configuration as
described above, there is a possibility that the lead wire 6 causes resonance and shorts to the top
plate 7. Although there is no fear at first in the case of a lead wire having a coating film, the
coating may be broken after prolonged use. In the case of a design designed to increase the
amplitude of the voice coil 1, it is necessary to adopt a tinsel wire resistant to repeated bending
to the lead wire 6 to prevent breakage, and this tinsel wire is generally coated. Since it does not
have at all, the risk of shorting becomes extremely large. In order to prevent such a short circuit,
an insulating paint is applied to the portion of the top plate 7 to be mled, or a method such as
applying an insulating tape is often taken, or -C. As the process becomes expensive, the cost
increases and the reliability is poor. Furthermore, there is also a method in which a coated tube is
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1
attached to the tinsel cord to prevent the vibration, but there is also a disadvantage that the
efficiency is reduced because the weight of the vibration system is increased. SUMMARY OF THE
INVENTION An object of the present invention is to solve the above-mentioned conventional
problems, and it is an object of the present invention to provide a speaker capable of securely
preventing short circuit between a lead wire and a top plate inexpensively.
The present invention provides a voice coil, a lead wire drawn from the voice coil, a top plate
facing the voice coil, a plastic frame fixed to the top plate, and a tongue provided on the plastic
frame. It is a speaker provided, and by positioning the tongue portion between the lead wire and
the top plate, short circuit thereof can be prevented. Description of the Embodiment FIG. 2 is a
cross-sectional view of a loudspeaker in an embodiment of the present invention. In FIG. 2, the
same parts as in FIG. 1 are assigned the same reference numerals and their explanation is
omitted, but 5a is a tongue provided on the plastic frame 6 by a method such as simultaneous
molding, and the lead wire 6 and the top plate 7. The operation of the loudspeaker of this
embodiment configured as described below will be described below. The basic operation is the
same as that of the conventional example shown in FIG. 1, but in the conventional example, since
the tongue piece 6a is provided between the lead wire 6 which might be shorted and the top
plate 7, the lead Even if the line 6 resonates, there is no possibility of a short circuit since it does
not directly contact the top plate 7. Also, as it is integrally molded with the plastic frame 6 in
terms of assembly, it is only necessary to directly fix it to the top plate 7, which also enables cost
reduction. Although the speaker in which the flat diaphragm 2 is used is described in the present
embodiment, the speaker having a diaphragm having another shape, such as a paper cone, may
be used. According to the present invention, by providing the tongue portion 5a on the plastic
frame 5, the short circuit can be reliably prevented by locating the tongue plate portion 5a
between the top plate end and the lead wire 6, and moreover any short circuit in the assembly
process Since there is no need to take measures, it is possible to realize an excellent speaker that
can be implemented inexpensively.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view of a conventional speaker, and FIG. 2 is a cross-sectional view of
the speaker according to an embodiment of the present invention.
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1 иии Voice coil, 5 и и и Plastic frame, 5a и и и и и и и и и и и и и и и lead wire, 7 и и и top plate.
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