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JPH05207592

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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 JPH05207592
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
so-called cone type speaker for supplying an audio signal to a voice coil coupled to a diaphragm
via a flexible lead and a voice coil lead wire to vibrate the diaphragm.
[0002]
2. Description of the Related Art FIG. 4 is a view showing the structure of a conventional
loudspeaker of this type, in which (A) is a plan view and (B) is a side sectional view.
[0003]
As shown in the figure, the peripheral portion of the cone-shaped diaphragm 1 is supported by
the frame 2, and the center cover 3 is attached to the central portion, and the cylindrical portion
is extended downward from the central portion. The voice coil 4 is coupled to the lower end.
The voice coil 4 is vertically movably fitted in the magnetic gap 6 of the field unit 5 coupled to
the lower end of the frame 2. Further, the cylindrical portion of the diaphragm 1 is supported by
the frame 2 via the damper 7 so that the voice coil 4 is properly positioned in the magnetic gap
6.
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[0004]
The two voice coil lead wires 8 of the voice coil 4 are drawn on the surface of the diaphragm 1
and, at the two connection through portions 9 provided on the diaphragm 1, each of the two
flexible leads 10. And soldered and connected. The flexible lead 10 connects the voice coil lead
wire 8 and the input terminal 11 attached to the outer surface of the frame 2 and is wired on the
back side of the diaphragm 1.
[0005]
Then, an audio signal is supplied from the input terminal 11 through the flexible lead 10 and the
voice coil lead wire 8, and the diaphragm 1 is vibrated.
[0006]
As described above, in the speaker of this type, the connection through portion 9 is
conventionally provided in the diaphragm 1, and the voice coil lead wire 8 and the flexible lead
10 are connected by the connection 2 through portion 9.
This is to shorten the length of the flexible lead 10 as much as possible. That is, when the voice
coil lead wire 8 is pulled out to the back side of the diaphragm 1, for example, near the damper
7, and then connected to the flexible lead 10, the flexible lead 10 becomes long and the long
flexible lead 10 resonates electrically during the speaker operation. The vibration noise may
occur due to contact with the vibrating plate 1 or the damper 7 that vibrates or vibrates.
[0007]
However, the connection through portion 9 of the diaphragm 1 connecting the voice coil lead
wire 8 and the flexible lead 10 is directed to the center of the diaphragm 1 according to the
speaker mounting location and method. In some cases, they can not be placed in symmetrical
positions.
[0008]
Therefore, in the conventional speaker, the weight balance of the vibration system consisting of
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the diaphragm 1 and the voice coil 4 and the damper 7 is broken, and as a result, the vibration
system rolls in operation in a specific frequency range. And the field portion 5 rub against each
other to generate an abnormal sound, or there is a problem that split resonance occurs in the
diaphragm 1 to distort the sound.
It is needless to say that the breakdown of the weight balance of the vibration system due to the
deviation of the arrangement of the connecting through parts 9 is particularly large when the
diaphragm 1 is small in diameter and light in weight.
[0009]
The present invention has been made to solve this problem, and it is an object of the present
invention to obtain a high-performance speaker in which the imbalance in the weight balance of
the vibration system due to the connection penetration portion is suppressed.
[0010]
[Means for Solving the Problems] In order to achieve the above object, in the speaker according
to the present invention, the diaphragm according to the present invention is provided with an
eyelet fitting at a position opposite to the connecting through portion with respect to the center
of the diaphragm. Attached with an additional weight.
[0011]
By attaching the above-mentioned additional weight, it is possible to suppress the breakdown of
the weight balance of the vibration system due to the deviation of the arrangement of the
connecting through parts.
As a result, it is possible to prevent the generation of the abnormal sound due to the rolling of
the vibration system and to prevent the generation of the distortion of the sound due to the
divided resonance of the diaphragm.
[0012]
Further, by using the eyelet metal fitting as the additional weight, it becomes possible to use the
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same part as the connection through portion.
As a result, it is not necessary to newly prepare different kinds of parts in providing the
additional weight, and the cost increase can be suppressed. In addition, when assembling the
speaker, any two adjacent ones of the plurality of eyelet fittings attached to the diaphragm can
be used as the connecting through parts, and hence the assembling operation can be easily
advanced.
[0013]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments of the present
invention will be described below based on the drawings.
[0014]
The same reference numerals as in the prior art shown in FIG. 4 denote the same constituent
elements in the drawings of the embodiment, and a description thereof will be omitted.
[0015]
Example 1 FIG. 1 is a plan view of a loudspeaker in Example 1. FIG.
[0016]
As shown in the figure, in this speaker, an additional weight 12 made of eyelet fittings is attached
to the diaphragm 1.
Moreover, the additional weight 12 is attached at a position opposite to the central portion of the
diaphragm 1 to which the center cover 3 is attached, of the two connection through portions 9
provided in the diaphragm 1. .
Furthermore, in the present embodiment, one additional weight 12 and two connection through
parts 9 are uniformly distributed on the same circumference centering on the central part of the
diaphragm 1, that is, mutually shifted by 120 degrees. It is arranged.
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[0017]
The other configurations of the voice coil, the damper, and the field portion (not shown) are the
same as in the conventional example.
[0018]
Thus, by uniformly arranging the two connection through parts 9 and one additional weight 12
on the diaphragm 1, a vibration system resulting from the deviation of the arrangement of the
connection through parts 9 as in the conventional example. It is possible to suppress the collapse
of the weight balance of
As a result, it is possible to prevent the generation of the abnormal sound due to the rolling of
the vibration system and to prevent the generation of the distortion of the sound due to the
divided resonance of the diaphragm 1.
[0019]
In addition, since the eyelet metal fitting can be used for the connection through portion 9, if the
eyelet metal fitting is used as the additional weight 12, the connection through portion 9 and the
additional weight 12 can be configured as a common part. .
As a result, there is no need to newly prepare different kinds of parts in providing the additional
weight 12, and the cost increase can be suppressed. Moreover, when assembling the speaker, any
two adjacent ones of the three eyelet metal fittings attached to the diaphragm 1 can be used as
the connecting through parts 9, whereby the assembling operation can be easily advanced. In the
case of the eyelet fitting as the additional weight 12, its hole is closed with an adhesive or the like
after assembly.
[0020]
Furthermore, since it is possible to attach solder to the eyelet fitting, if the solder is attached to
the additional weight 12 comprising the above-mentioned eyelet fitting, the weight of the
additional weight 12 is used as the weight of the connecting through portion 9 Accordingly, the
weight balance of the vibration system can be adjusted more accurately.
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[0021]
Second Embodiment FIG. 2 is a plan view of a speaker in a second embodiment.
[0022]
As shown in the figure, in this speaker, two additional weights 12 made of eyelet metal fittings
are attached to the diaphragm 1 at positions opposite to the two connection through parts 9 with
respect to the central part thereof. The two connecting penetrations 9 and the two additional
weights 12 are arranged symmetrically with respect to the central portion of the diaphragm 1.
[0023]
By thus mounting the two additional weights 12 made of eyelet metal fittings, the two connection
through parts 9 and one additional weight 12 can be uniformly arranged on the diaphragm 1 as
in the first embodiment. Even when it can not be done, it is possible to suppress the collapse of
the weight balance of the vibration system and to prevent the occurrence of abnormal noise or
distortion of sound.
[0024]
Also in the case of the present embodiment, as in the case of the first embodiment, the increase
in cost can be suppressed by configuring the connecting through portion 9 and the additional
weight 12 by the common parts of the eyelet fitting. At the time of speaker assembly, by making
any two adjacent ones of the four eyelet fittings attached to the diaphragm 1 as the connecting
through parts 9, the assembly operation can be easily advanced.
Furthermore, it is possible to attach solder to the two additional weights 12 made of eyelet
fittings to adjust the weight balance of the vibration system more accurately.
[0025]
FIG. 3 is a diagram showing an analysis of the vibration state of the diaphragm in the speaker (A)
according to the present invention and the conventional speaker (B).
[0026]
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As shown in FIG. 3B, in the case of a conventional speaker, the weight of the vibration system is
broken by the connecting through portion 9 to cause split resonance in the diaphragm, which
distorts the sound.
On the other hand, as shown in FIG. 3 (A), in the case of the loudspeaker according to the present
invention, the diaphragm vibrates in an overall well-balanced state, thereby making it possible to
produce a sound without distortion.
[0027]
As described above, in the speaker according to the present invention, by attaching the additional
weight to the diaphragm, the balance of the weight of the vibration system due to the deviation
of the arrangement of the connection through portion is suppressed. As a result, it is possible to
prevent the generation of abnormal noise and to prevent the generation of distortion of sound.
[0028]
Moreover, by using the eyelet metal fitting as the additional weight, it is possible to make it a
part common to the connection through part, and as a result, it is possible to suppress the cost
increase due to the additional weight and to easily proceed with the assembly work.
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