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JPH1094087

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DESCRIPTION JPH1094087
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
elliptical speaker diaphragm used in a speaker device used for video and audio equipment and
the like, and an elliptical speaker using the same.
[0002]
2. Description of the Related Art In recent years, speakers used for video and audio equipment,
etc. are required to be slim and have high performance, and an elliptical speaker having a
configuration in which the diaphragm is made one size larger even with the same aperture
enhances bass and enhances efficiency Adopted as a means of
[0003]
Hereinafter, a conventional elliptical speaker of this type will be described with reference to FIGS.
2 and 3.
FIG. 2 is a cross-sectional view of an elliptical speaker on the minor axis side, FIG. 3 (a) is a top
view of the diaphragm for the elliptical speaker which is the main part, and FIG. 3 (b) is a side
view on the same diameter side FIG. 3C is a side view on the short diameter side.
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1
[0004]
According to the figure, reference numeral 1 denotes a magnetic circuit, which comprises a
bottom plate 1a, a magnet 1b and a top plate 1c, and a magnetic gap 1d is formed between the
top plate 1c and the bottom plate 1a.
[0005]
2 is a frame coupled to the top plate 1c.
A voice coil 3 is fitted in the magnetic gap 1 d and is positioned and held by being coupled to the
inner periphery of a damper 7 whose outer periphery is coupled to the frame 2.
[0006]
A diaphragm 4 has an outer periphery coupled to the frame 2 through the edge portion 4 a and
an inner periphery coupled to the voice coil 3.
[0007]
Reference numeral 5 denotes a tinsel wire, which connects the voice coil 3 and the outer terminal
6.
According to the above configuration, the voice coil 3 is vibrated by the electric signal inputted
from the outer terminal 6, and the diaphragm 4 is vibrated to generate a sound.
[0008]
Next, the diaphragm 4 will be described in more detail. The diaphragm 4 is called an elliptical
diaphragm, and the outer shape of the diaphragm body 4c is made larger than the roll portion 4b
of the edge portion 4a. The bonding and bonding of the diaphragm main body 4c is configured to
be bonded to the lower part of the all-round diaphragm main body 4c.
[0009]
As described above, the diaphragm main body 4c has an outer shape larger than the roll portion
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4b of the edge portion 4a, thereby enhancing the bass and increasing the efficiency.
[0010]
However, there is nothing to position the diaphragm main body 4c and the edge portion 4a, and
the diaphragm main body 4c has a cone shape as shown in FIGS. Since the part is inclined, the
production is complicated, the production cost is high, the reliability of bonding is poor, and
there is a possibility that both may be peeled off in actual use as an elliptical speaker.
[0011]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present
invention forms a diaphragm main body with a smaller outside dimension on the short diameter
side than the bent portion of the edge portion and a large outside dimension on the long
diameter side. The minor axis side of the diaphragm main body is brought into contact with the
above-mentioned bent portion, and the above-mentioned edge portion and the diaphragm are
combined to form an elliptical speaker diaphragm, and positioning is performed by making the
diaphragm main body abut on the bent portion. It is extremely easy and reliable bonding can be
performed inexpensively.
[0012]
According to the first aspect of the present invention, the diaphragm main body is formed with a
smaller outside dimension on the short diameter side than the bent portion of the edge portion
and a large outside dimension on the longer diameter side, and this vibration is generated. The
short diameter side of the plate main body is brought into contact with the above-mentioned bent
portion to couple the above-mentioned edge portion and the diaphragm main body. Positioning is
made extremely easy by bringing the diaphragm main body into contact with the bent portion. It
is possible.
[0013]
In the invention according to claim 2 of the present invention, the diaphragm main body is
formed with a smaller outside dimension on the short diameter side than the bent portion of the
edge portion and with a large outside dimension on the long diameter side. The edge material is
joined so as to sandwich the edge material, and by sandwiching the edge portion with the
diaphragm main body, the positioning can be extremely facilitated and bonding and joining can
be performed.
[0014]
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The invention according to claim 3 of the present invention is capable of providing a high quality
speaker in which the bass is enhanced by configuring the speaker using the elliptical speaker
diaphragm according to claim 1 or 2 .
[0015]
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
In addition, since the structure of an elliptical speaker is the same as that of the prior art,
description is abbreviate | omitted and the diaphragm for elliptical speakers which is a principal
part is demonstrated.
[0016]
FIG. 1 (a) is a top view of an elliptical speaker diaphragm which is an essential part of the present
invention, FIG. 1 (b) is a side view of the same long diameter side, and FIG. 1 (c) is a short side
view .
According to the figure, reference numeral 10a is a diaphragm main body, and the outer
diameter C of the diaphragm main body 10a on the short diameter side is substantially the same
as the inner diameter D up to the bending portion 10c of the roll portion 10e of the edge portion
10b. The outer shape F of the main body 10a is larger than the inner diameter B up to the
corresponding bending portion 10c of the edge portion 10b.
[0017]
The elliptical speaker diaphragm 10 configured as described above has the diaphragm body 10a
below the edge portion 10b on the minor axis side with the cut portion 11 as a boundary, and
the diaphragm body 10a on the major axis side. It is bonded and formed on the upper side of the
edge portion 10b.
[0018]
At this time, by bringing the outer periphery of the minor diameter side diaphragm main body
10a into contact with the bent portion 10c of the roll portion 10e of the edge portion 10b,
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positioning at the time of bonding can be easily performed.
[0019]
Moreover, it is also possible to define the cut | notch dimension of the cut | notch part 11 and to
make the edge part 10b contact | abut this cut | notch part 11 and to perform positioning easily
at the time of both bonding together.
[0020]
As described above, since positioning is facilitated, complexity of bonding work is eliminated, and
reliability of bonding is improved, and high quality is achieved by enhancing bass and increasing
efficiency even as an elliptical speaker. Can be provided inexpensively.
[0021]
As described above, since the present invention can perform bonding of the edge portion of the
diaphragm and the diaphragm main body extremely easily and reliably, the enhancement of bass
as an elliptical speaker and the enhancement of efficiency can be achieved inexpensively and
reliably. It can be provided as a good one.
[0022]
Brief description of the drawings
[0023]
FIG. 1A is a top view of an embodiment of an elliptical speaker diaphragm which is an essential
part of the elliptical speaker according to the present invention.
[0024]
Fig. 2 A side sectional view of a conventional elliptical speaker
[0025]
Fig. 3 (a) Top view of the elliptical speaker diaphragm which is the same main part
[0026]
Explanation of sign
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[0027]
DESCRIPTION OF SYMBOLS 1 Magnetic circuit 2 Frame 3 Voice coil 7 Damper 10 Elliptical
speaker diaphragm 10a Diaphragm main body 10b Edge portion 10c Curved portion 11 Notched
portion
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