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JP2004312599

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DESCRIPTION JP2004312599
The present invention relates to a speaker used for various audio devices, and it is an object of
the present invention to provide a speaker with high performance by reducing non-linearity and
asymmetry to reduce harmonic distortion. A speaker according to the present invention is
provided with a suspension holder 17 for coupling an inner periphery of a voice coil 13 closer to
a magnetic circuit 12 than a diaphragm 15 of the voice coil 13. A first edge 15a of the
diaphragm 15 and the suspension holder The non-linearity and asymmetry of the entire
suspension are eliminated by the 17 second edges 17 a to reduce harmonic distortion and to
improve the power linearity to achieve high performance of the speaker, and the suspension
holder 17. The gold wire can be held by the groove provided in the to enable a direct lead
system, and also the number of assembling steps of the speaker can be reduced. [Selected figure]
Figure 1
スピーカ
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used for various acoustic devices and the like. 2. Description of the Related Art A
conventional speaker is configured as shown in FIG. That is, the conventional speaker includes a
magnetic circuit 1, a voice coil 4 in which at least a coil portion 3 is movably provided in a
magnetic gap 2 of the magnetic circuit 1, and a magnetic gap 2 of the voice coil 4. The outside
portion is configured to include the diaphragm 5 whose inner periphery is connected, and the
frame 7 whose outer periphery of the diaphragm 5 is connected via the edge 6. That is, when an
electric signal output from an audio amplifier or the like is input to the voice coil unit 3 of the
voice coil 4, the voice coil 4 is excited, and the exciting force is transmitted to the diaphragm 5 to
vibrate. The plate 5 vibrates the air to convert the electric signal into sound. The abovementioned example of the conventional speaker is very general, and is also described in Patent
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Document 1 as a prior art. Patent Document 1: Japanese Patent Application Laid-Open No. 200337894 SUMMARY OF THE INVENTION In the above-mentioned prior art, the voice coil portion 3
of the voice coil 4 and the inner periphery fixing portion of the diaphragm 5 And the outer
periphery of the damper 8 is fixed to the frame 7. The damper 8 constitutes a suspension
together with the edge 6 to prevent the voice coil 4 from rolling when moving. Further, the
damper 8 has a configuration in which a plurality of waveforms are combined so as not to be a
movable load of the voice coil 4 as much as possible. However, in the performance enhancement
of the speaker in recent years, the existence of the damper 8 causes a big problem. That is, the
non-linearity and the asymmetry of the movable load of the damper 8 are large in the behavior of
the voice coil 4 toward the magnetic circuit 1 and the behavior toward the opposite side of the
magnetic circuit 1, and harmonic distortion caused thereby. At the same time, the power linearity
was to deteriorate. In order to solve the problems of power linearity deterioration and harmonic
distortion characteristics caused by such non-linearity and asymmetry, there have conventionally
been various devices for solving the non-linearity and asymmetry of the damper 8. Although
attempts have been made, as described above, since the damper 8 is formed by combining a
plurality of waveforms so as to reduce the movable load, it is possible to combine the damper 8
and the edge 6 to form a suspension, It is difficult to reduce harmonic distortion by solving nonlinearity and asymmetry, and at present it is not possible to improve the performance of
speakers.
Therefore, the present invention aims to improve the performance of the speaker. [0011] The
invention of the speaker according to claim 1 of the present invention for achieving this object is
a magnetic circuit having a magnetic gap, and the magnetic gap of the magnetic circuit. A voice
coil in which at least the coil portion is movably provided, a diaphragm in which an inner
periphery is connected to an outer portion of the magnetic gap of the voice coil, and an outer
periphery of the diaphragm has a first edge The inner periphery of the suspension holder is
connected to the magnetic circuit side of the voice coil of the voice coil of the speaker connected
via the frame, and the outer periphery of the suspension holder is connected to the frame via the
second edge And the first and second edges are suspended by the first edge and the second edge
as a substantially symmetrical similar shape bordering the first and second edges. In addition to
eliminating the damper that causes the non-linearity and asymmetry of the suspension, the first
edge and the second edge can cancel their own asymmetry, and the non-linearity of the
suspension can be eliminated. The nature and the asymmetry can be fundamentally solved, which
can reduce the harmonic distortion and the power linearity of the loudspeaker and can improve
the performance of the loudspeaker. Further, by providing a groove for sandwiching the gold
wire connecting the voice coil and the terminal in a direction substantially normal to the
suspension holder, the gold wire can be stably arranged and a direct lead system can be realized.
is there. According to a second aspect of the present invention, there is provided a speaker
according to a second aspect of the present invention, comprising: a magnetic circuit having a
magnetic gap; and a voice coil having at least a coil portion movably provided in the magnetic
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gap of the magnetic circuit. A diaphragm having an inner periphery thereof connected to a
magnetic gap outer portion of the voice coil, and a frame having an outer periphery of the
diaphragm connected via a first edge, the vibration of the voice coil The inner periphery of the
suspension holder is connected to the magnetic circuit side from the plate, and the outer
periphery of the suspension holder is connected to the frame via the second edge, and the first
and second edges are the first and second edges. The diaphragm and the suspension holder are
joined at their middle portions and have a substantially symmetrical similar shape at the
boundary between the two edges, and the first edge and the suspension holder. Configuring the
suspension with the second edge eliminates the dampers that cause non-linearity and asymmetry
of the suspension, while the first edge and the second edge are arranged to cancel their own
asymmetry As a result, the non-linearity and the asymmetry of the suspension can be
fundamentally solved, and the harmonic distortion reduction and the power linearity of the
loudspeaker resulting therefrom can be improved to improve the loudspeaker performance.
Further, by connecting the diaphragm and the suspension holder at their middle portions, the
phases of the both can be matched, and the frequency characteristics of the mid-low range can
be flattened. Further, by providing a groove for sandwiching the gold wire connecting the voice
coil and the terminal in a direction substantially normal to the suspension holder, the gold wire
can be stably arranged and a direct lead system can be realized. . According to a third aspect of
the present invention, in the speaker according to the first or second aspect, the inner peripheral
portion of the suspension holder is provided with a notch so that a gold thread wire and a voice
coil bobbin are provided. The direct lead system is easily realized by avoiding the interference
with the fixed part. According to a fourth aspect of the present invention, in the speaker
according to the first and second aspects, the protrusion is provided on both sides of the groove
for sandwiching the gold wire of the suspension holder, thereby facilitating the improvement. It
realizes the direct read method. According to a fifth aspect of the present invention, in the
loudspeaker of the fourth aspect, the projections provided on both sides of the groove for
sandwiching the gold wire of the suspension holder are substantially in the normal direction of
the suspension holder. On the other hand, the direct reading method can be easily realized by
partially providing them. According to a sixth aspect of the present invention, in the speaker
according to the fifth aspect, the projection partially provided with respect to the substantially
normal direction of the suspension holder is in an asymmetrical position with respect to the
groove on the left and right. By providing them, the direct reading method can be easily realized.
According to a seventh aspect of the present invention, in the loudspeaker according to the first
or second aspect, the gold wire and the voice coil bobbin are formed by providing a notch in the
inner peripheral portion of the diaphragm. It prevents interference with the fixed part and easily
realizes a direct lead system. According to an eighth aspect of the present invention, in the
loudspeaker according to the seventh aspect, the notch is provided only in the neck portion along
the voice coil bobbin of the diaphragm, thereby facilitating direct connection. It realizes the lead
system. BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present
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invention will be described below with reference to FIGS. 1 to 8. First Embodiment FIG. 1 is a
cross-sectional view of a speaker according to a first embodiment of the present invention, and
FIG. 2 is a perspective view of a suspension holder which is the main part of the present
embodiment. The claim 1 and the claim 2 will be described.
According to the drawing, reference numeral 12 denotes a magnetic circuit having a magnetic
gap 12 a, and 13 denotes a voice coil in which at least the coil portion 14 is movably provided in
the magnetic gap 12 a of the magnetic circuit 12. There is a diaphragm 15 whose inner
periphery is connected to the magnetic gap outer part of the voice coil 13, and a frame 16 is the
outer periphery of the diaphragm 15 connected via the first edge 15a. A suspension holder 17 is
connected to the inner periphery of the voice coil 13 from the diaphragm 15 to the magnetic
circuit 12 and the outer periphery is connected to the frame 16 through a second edge 17a. A
groove 21 for sandwiching a gold wire 20 connecting the voice coil 13 and the terminal 19 in a
direction substantially normal to 17 is provided. The suspension holder 17 is mainly made of
pulp and resin, which have both high rigidity and internal loss. Also, although the second edge
17 a couples the outer periphery of the suspension holder 17 to the frame 16, the movable load
of the suspension holder 17 is the same as the first edge 15 a reduces the movable load of the
diaphragm 15. Materials such as urethane and rubber, cloth are used to reduce the Furthermore,
the first edge 15 a protrudes in the direction of the magnetic circuit 12, and the second edge 17
a protrudes in the opposite direction of the magnetic circuit 12, and the first and second edges
15 a and 17 a border the middle thereof The shape is approximately symmetrical and similar.
Further, since the suspension by the suspension holder 17 and the second edge 17 a is provided
between the voice coil 13 and the frame 16 instead of the conventional damper, the suspension
holder 17 and the second edge 17 a A suspension is constituted by the edge 15a of 1 and the
rolling at the time of movement of the voice coil 13 is suppressed. By configuring the suspension
as described above, it is possible to eliminate the damper which causes the non-linearity and
asymmetry of the suspension, and the first edge 15 a and the second edge 17 a Since they have a
substantially symmetrical similar shape so as to cancel their asymmetry, specifically, the first
edge 15a and the second edge 17a are disposed opposite to each other so that the projecting
directions are opposite to each other. It is possible to solve the non-linearity and asymmetry of
the suspension. Furthermore, since the suspension holder 17 has a groove 21 for sandwiching
the gold wire 20 connecting the voice coil 13 and the terminal 19 in the substantially normal
direction, the gold wire 20 as described above. Is embedded in and fixed to the groove 21 of the
suspension holder 17 so that it is fixed to the suspension holder 17 when assembled in the
manufacturing process or even before the diaphragm 15 is fixed, and the position is stable and
easy It becomes possible to assemble in the lead system.
Further, since the gold wire 20 is mechanically held, the direct lead system can be realized stably
in terms of quality. Further, in the present embodiment, although the diaphragm 15 and the
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suspension holder 17 are coupled to each other at their middle portions, this allows the phases of
both to be matched, and the mid-low range due to this. Can flatten the frequency characteristics
of H. It is possible to provide a higher performance speaker. Needless to say, when the
diaphragm 15 and the suspension holder 17 are not coupled at the intermediate portion as
described above, the above-described effects can be obtained except for the phase matching and
the effects thereof. Second Embodiment Another embodiment of the present invention will be
described with reference to FIG. The same parts as in the first embodiment will be assigned the
same reference numerals, and the description thereof will be omitted to mainly describe claim 3.
FIG. 3 is a perspective view of a suspension holder which is an essential part of another
embodiment of the present invention. The difference between the present embodiment and the
first embodiment is only the suspension holder, and the configuration will be described with
reference to FIG. 3. 22 is a suspension holder, and the gold wire 20 of the inner peripheral
portion and the voice A notch 22b is provided to avoid interference with the fixing portion A
(shown in FIG. 1) with the coil 13, and a dust avoiding net and the like are arranged, so that the
suspension holder 17 from above the voice coil 13 in the manufacturing process. Even if the
construction can not be made without inserting, the direct lead system can be easily realized by
passing the notch. Reference numeral 22 a denotes a groove for sandwiching a gold wire 20
connecting the voice coil 13 and the terminal 19 provided in the direction substantially normal
to the suspension holder 22. As shown, the groove 22a is provided on the inner peripheral side
to the notch 22b, and the gold wire 20 is drawn downward without being interfered by the
suspension holder 22 by the coil portion 14. Third Embodiment Another embodiment of the
present invention will be described with reference to a perspective view of a suspension holder
which is a main part of FIG. The same parts as in the first embodiment will be assigned the same
reference numerals, and the description thereof will be omitted to mainly describe claim 4. The
difference between the present embodiment and the second embodiment is only the suspension
holder, and the configuration thereof will be described with reference to FIG. 4. The suspension
holder 23 is a groove provided in the substantially normal direction. By providing projections
23c on both sides of 23a, the gold wire 20 can be held more stably.
As shown, the groove 23a is provided on the inner peripheral side up to the notch 23b, and the
gold wire 20 is pulled downward without being interfered by the coil portion 14 by the
suspension holder 23. Fourth Embodiment Another embodiment of the present invention will be
described with reference to a perspective view of a suspension holder which is an essential part
of FIG. The same parts as in the third embodiment will be assigned the same reference numerals,
and the description thereof will be omitted to mainly describe claim 5. The difference between
the present embodiment and the third embodiment is only in the suspension holder 24, and the
projections 24 c provided on both sides of the groove 24 a through which the gold wire 20 of the
suspension holder 24 passes are partially provided. is there. According to this configuration, even
when the shapes of the suspension holder and the diaphragm have various shapes, it is possible
to realize the direct lead system while maintaining the holding effect of the gold wire. As shown,
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the groove 24a is provided on the inner peripheral side up to the notch 24b, and the gold wire
20 is pulled downward without being interfered by the suspension holder 24 by the coil portion
14. Fifth Embodiment Another embodiment of the present invention will be described with
reference to a perspective view of a suspension holder which is an essential part of FIG. The same
parts as in the fourth embodiment will be assigned the same reference numerals, and the
description thereof will be omitted. The difference between the present embodiment and the
fourth embodiment is only in the suspension holder 25, and projections 25 c partially provided
on both sides of the groove 25 a through which the gold wire 20 of the suspension holder 25
passes are made with respect to the groove 25 a. It was installed in a place that is not
symmetrical. According to the present invention, even if the size of the protrusion 25c is the
same as that of the fourth embodiment, since the protrusion 25c is disposed at a position not
symmetrical with respect to the groove 25a, the gold wire 20 is detached from the groove 25a.
Since the protrusion can be efficiently prevented, more stable speaker assembly can be realized
directly by the lead system. As shown, the groove 25a is provided on the inner peripheral side up
to the notch 25b, and the gold wire 20 is pulled downward without being interfered by the coil
holder 14 with the suspension holder 25. Sixth Embodiment Another embodiment of the present
invention will be described with reference to a perspective view of a diaphragm which is a main
part of FIG. According to the figure, reference numeral 26 denotes a diaphragm, which is similar
to the notches 22 b to 25 b provided on the suspension holders 22 to 25 described in the second
to fifth embodiments. A notch 26 a corresponding to the inner circumference of the cylinder 26
is provided.
According to this method, since interference with the diaphragm 26 of the fixed portion on the
voice coil 13 side of the gold wire 20 can be prevented, the attachment position of the
diaphragm 26 can be set low close to the gold wire 20 to directly lead. While realizing the
method, it is possible to make the speaker thinner. The diaphragm 26 of this embodiment can be
applied to any of the loudspeakers of the second to fifth embodiments described above. Seventh
Embodiment The eighth embodiment of the present invention will be described mainly with
reference to a perspective view of a diaphragm which is a main part of FIG. The difference
between the loudspeakers according to the present embodiment and the sixth embodiment is
only the diaphragm, so to describe only the differences, the diaphragm 27 is partially disposed in
the vertical portion along the voice coil 13. By providing the notches 27a, it is possible to easily
realize the direct lead system and the thinning of the speaker while securing the adhesive
strength between the diaphragm and the voice coil and improving the sound quality. According
to the speaker of the present invention configured as described above, harmonic distortion of the
speaker can be reduced, power linearity can be improved, and the performance of the speaker
can be enhanced. Since the direct lead system in which the voice coil and the gold wire are
directly joined can be adopted, the number of assembling steps of the speaker can be reduced.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of an embodiment of a
speaker according to the present invention. FIG. 2 is a perspective view of a suspension holder
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which is an essential part of the present invention. 4 is a perspective view of the suspension
holder which is the main part of the other embodiment. FIG. 5 is a perspective view of the
suspension holder which is the main part of the other embodiment. 6 is a perspective view of a
suspension holder which is a main part of the other embodiment. FIG. 7 is a perspective view of a
diaphragm which is a main part of the other embodiment. FIG. 8 is a main part of the other
embodiment. Fig. 9 is a sectional view of a conventional loudspeaker [Fig. 9] 12 magnetic circuit
12a magnetic gap 13 voice coil 14 coil section 15, 26 and 27 diaphragm 15a first edge 16 frame
17 , 22, 23, 24, Reference Signs List 25 suspension holder 17a second edge 19 terminal 20 gold
wire 21, 22a, 23a, 24a, 25a groove 22b, 23b, 24b, 25b notch 23c, 24c, 25c protrusion 26a, 27a
notch A fixing portion
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