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JP2001268687

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2001268687
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
loudspeaker diaphragm, and more particularly to a loudspeaker diaphragm in which the lead
wire of a voice coil attached to the loudspeaker diaphragm is prevented from being cut off.
[0002]
2. Description of the Related Art An example of a conventional speaker diaphragm will be
described with reference to FIGS. 4 and 5. FIG. The voice coil bobbin 2 shown in the figure is
adhered to the diaphragm 8 by an adhesive 5, and the diaphragm 8 is supported by the frame 10
through the edge 11. The voice coil bobbin 2 is further supported by the frame 10 via the
damper 4.
[0003]
The lead wire 3 connected to the voice coil 9 wound around the voice coil bobbin 2 is wound on
the voice coil bobbin 2 and the diaphragm 8 and bonded to them, and further connected to the
speaker terminal plate 12 by a tinsel wire 6.
[0004]
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1
The above-mentioned conventional speaker diaphragm fluctuates between the position shown by
the solid line in FIG. 5 and the position shown by the dotted line in the positional relationship
with the voice coil bobbin 2 due to the vibration of the voice coil bobbin 2. .
That is, it will be bent repeatedly in the bending part 8a. For this reason, the lead wire 3 may be
repeatedly bent, and may be broken when the number of bending increases.
[0005]
Japanese Utility Model Laid-Open Publication No. 63-158088 proposes a speaker diaphragm
provided with ribs all over the inner peripheral side, and a speaker diaphragm provided with
cross ribs bridged to the inner peripheral side.
[0006]
Such a diaphragm has a structure in which the bonding portion with the voice coil bobbin is not
easily deformed, but the rib becomes large and the weight of the vibrating portion increases,
which causes a problem that the gain in the high vibration region is reduced.
[0007]
In addition, in Japanese Utility Model Application Laid-Open No. 63-158088, the support of the
lead wire is not taken into consideration, and in the case where the rib is provided on the entire
inner peripheral side, it is extremely difficult to fix the lead wire over the rib. In this case, a part
of the lead wire is placed in the air, but in this case, the lead wire may vibrate to contact another
part to generate noise.
[0008]
In addition, if the lead wire is wound around the portion where the rib is not provided by the
speaker diaphragm provided with the cross rib on the inner circumferential side, the portion
where the lead wire is wound is bent and the lead wire may be broken. It occurs.
[0009]
The present invention has been made in view of the above-described point, and the object of the
present invention is a speaker diaphragm in which there is no fear that a lead wire for connection
to a voice coil is broken and that the high sound characteristic is not deteriorated. To provide.
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2
[0010]
SUMMARY OF THE INVENTION The speaker diaphragm of the present invention is such that
only the vicinity where the lead wire of the voice coil is attached is made thicker than the
thickness of the other part.
[0011]
Further, in the speaker diaphragm of the present invention, a step is provided at the boundary
between the portion to which the lead of the voice coil is attached and the periphery thereof.
[0012]
DESCRIPTION OF THE PREFERRED EMBODIMENT A loudspeaker diaphragm which is an
example of the present invention will be described based on the drawings.
FIG. 1 is a plan view showing a speaker diaphragm according to a first embodiment of the
present invention, and FIG. 2 is a sectional view taken along the line A-A in FIG.
[0013]
In the embodiment, bonding the voice coil bobbin 2 to the diaphragm 1 with the adhesive 5 and
supporting the diaphragm 1 by a frame, and further supporting the voice coil bobbin 2 by a
frame via the damper 4 is shown in FIG. This is the same as the conventional example shown in
FIG.
[0014]
In the diaphragm 1 of the embodiment, the thick portions 1a and 1a are formed only in the
portion where the lead wire 3 is wound.
Therefore, the diaphragm 1 fluctuates between the position shown by the solid line in FIG. 2 and
the position shown by the dotted line in positional relationship with the voice coil bobbin 2.
That is, it is bent at the corner portion 1b.
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3
For this reason, the lead wire 3 is not in the portion to be bent, and the lead wire 3 is not
repeatedly bent.
Therefore, there is no fear that the lead wire 3 will break.
Moreover, the thick portions 1a and 1a are formed in a narrow range, and the problem that the
weight of the vibrating portion is increased and the gain in the high vibration region is reduced
does not occur.
[0015]
FIG. 3 is a partial sectional view showing a speaker diaphragm according to a second
embodiment of the present invention.
In this example, a step 7a is provided at the boundary between the portion around the lead wire
3 of the diaphragm 7 and the periphery thereof.
The other configuration is the same as that of the first embodiment.
[0016]
The diaphragm 7 fluctuates between the position shown by the solid line in FIG. 3 and the
position shown by the dotted line in the positional relationship with the voice coil bobbin 2. That
is, it will be bent in the part of level ¦ step difference 7a. And since the lead wire 3 is not in the
part to be bent, the lead wire 3 is not bent repeatedly. Therefore, there is no fear that the lead
wire 3 will break. Furthermore, the problem that the weight of the diaphragm 7 is increased and
the gain in the high vibration region is reduced does not occur.
[0017]
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4
According to the speaker diaphragm of the present invention, since the diaphragm is not bent at
the part where the lead wire is wound, there is no fear that the lead wire will be broken.
Moreover, the weight of the vibrating portion is not increased and the gain in the high vibration
region is not reduced.
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