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JPH07203585

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DESCRIPTION JPH07203585
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used in various audio equipment.
[0002]
2. Description of the Related Art For the purpose of expanding the reproduction frequency band,
the inner peripheral portion of the edge may be fixed to the inside of the outer peripheral portion
of the diaphragm to constitute a speaker.
[0003]
This type of speaker will be described with reference to FIG.
This speaker has an edge in which the frame 17 is coupled to the field portion 13 constituted by
the yoke 14, the magnet 15, and the plate 16, and the inner peripheral portion is fixed to the
peripheral portion of the frame 17 inside the outer peripheral portion of the diaphragm 18. The
outer periphery of 19 is fixed, the voice coil 20 is coupled to the lower surface of the central
portion of the diaphragm 18, the middle portion of the voice coil 20 is supported by the damper
21, and the lower portion of the voice coil 20 is properly fitted to the field portion 13. In
addition, the dust cap 22 is attached to the upper surface of the central portion of the diaphragm
18.
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[0004]
Generally, at the time of speaker assembly, an edge 19 is fixed in advance to the diaphragm 18,
but in the above-mentioned conventional speaker, as is apparent from the cross-sectional shape
of FIG. Unlike general speakers whose inner peripheral part is fixed to the outer peripheral part
of diaphragm 18, the assembly of diaphragm 18 and edge 19 can not be stacked and packed in a
large amount, so transport and packaging costs are forced to increase. It was
[0005]
In addition, although the diaphragm 18 and the edge 19 which are individually delivered may be
pasted together at the time of speaker assembly, there is a problem that eccentricity easily occurs
and the defect rate is high.
[0006]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the
loudspeaker according to the present invention has an outer peripheral portion of an edge
provided with a through hole in the inner peripheral portion on the peripheral edge of a frame
coupled to the upper surface of the field portion. A voice coil is connected and fixed to the inner
periphery of this edge is a diaphragm having a protrusion formed on the periphery at its
periphery and a protrusion to be fitted into the through hole provided at the edge. Are combined.
[0007]
[Function] With the above configuration, in the speaker having the configuration in which the
inner peripheral portion of the edge is fixed to the inner side than the outer peripheral portion of
the diaphragm, the diaphragm and the edge can be bonded without eccentricity at the time of
assembly. The defect rate can be realized.
[0008]
DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will
be described below with reference to FIGS.
[0009]
FIG. 1 is a half sectional view of the speaker in the embodiment, and FIGS. 2 and 3 are a plan
view and a front half sectional view of a diaphragm and an edge used for the speaker of the
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2
present invention.
[0010]
In FIG. 1, the frame 5 is coupled to the field portion 1 constituted by the yoke 2, the magnet 3
and the plate 4, the outer periphery of the edge 6 is fixed to the periphery of the frame 5, and the
inner periphery of the edge 6 The diaphragm 7 is attached to the lower surface of the diaphragm
7. The voice coil 8 is coupled to the lower surface of the central portion of the diaphragm 7. The
intermediate portion of the voice coil 8 is supported by the damper 9 and the lower portion of
the voice coil 8 is fitted to the field portion 1. Thus, the dust cap 10 is attached to the upper
surface of the central portion of the diaphragm 7.
[0011]
Here, in the diaphragm 7 of the present embodiment, the projections 11 are provided so as to be
fitted into the through holes 12 formed in the inner peripheral portion of the edge 6.
[0012]
As described above, since the speaker of the present invention is configured, in the speaker
having the configuration in which the inner peripheral portion of the edge is fixed to the inside
from the outer peripheral portion of the diaphragm, a large number of them are individually
assembled at the time of assembly. The diaphragm and the edge, which are delivered at low cost
shipping and packaging costs, can be bonded without eccentricity, and the industrial value is
large, which achieves both low cost and low defect rate.
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