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DESCRIPTION JPH11155195

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DESCRIPTION JPH11155195
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the
structure of a speaker device (referred to as a speaker in the following description) in which the
lead wire length of a voice coil disposed in a diaphragm and voice coil bobbin portion is
shortened.
[0002]
2. Description of the Related Art A conventional example of a full range frequency band
reproduction speaker or a low frequency band reproduction speaker in which the diameter of the
opening of a cone-shaped diaphragm is about 16 cm will be described with reference to FIG.
[0003]
FIG. 4 is a central cross-sectional view showing the main part of a conventional speaker 100, and
the speaker 100 is composed of a magnet unit 101, a frame unit 102, a cone paper unit 103, a
voice coil unit 104 and a signal line extraction unit 105.
[0004]
A columnar center pole 1 rising from a lower yoke 3, an unmagnetized magnet 2 made of a ringshaped permanent magnet material, a disc-shaped lower yoke 3, and a magnet guide 3 a integral
with the lower yoke 3 It comprises the upper yoke 4 having a through hole 4a at the center.
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[0005]
The frame portion 102 protrudes laterally from the upper end of a ring-shaped bottomed portion
5c having an opening 5d at its center, a hollow cylindrical portion 5g rising from the peripheral
edge of the bottomed portion 5c, and an upper end of the hollow cylindrical portion 5g. Ringshaped mounting portion 5h, hollow cylindrical portion 5i rising from the peripheral portion of
mounting portion 5h, ring-shaped mounting portion 5j extending laterally from the upper end of
hollow cylindrical portion 5i, and peripheral edge of mounting portion 5j A hollow conical bodyshaped regular wall 5f rising from a portion, a ring-shaped mount projecting laterally from the
open end of the regular wall 5f and having an edge on the outer periphery, and the regular wall
5f A second window 5b, a support 9a of a first diaphragm damper 7a provided on the attachment
5j inside the frame 102, and a second on the attachment 5h inside the frame 102 Constituting
more becomes the frame 5 and the supporting portion 9b of the diaphragm damper 7b.
[0006]
The cone paper portion 103 is constituted by a cone-shaped diaphragm 6, an edge 6a provided
around the diaphragm 6, and a rib 6b provided around the edge 6a.
[0007]
The voice coil unit 104 is configured of a first diaphragm damper 7a, a second diaphragm
damper 7b, a voice coil bobbin 8 and a voice coil 8a.
[0008]
The signal lead-out portion 105 is constituted by the voice coil lead wire 11 from the voice coil
8a, the drive signal input terminal 12, the voice coil lead wire terminal 13 attached to the coneshaped diaphragm 6, and the flexible signal wire 14 consisting of tinsel wire. .
[0009]
Next, how to assemble the speaker 100 configured by the magnet unit 101, the frame unit 102,
the cone paper unit 103, the voice coil unit 104, and the signal extraction unit 105 will be
described.
[0010]
The lower surface of the magnet 2 is bonded to the lower yoke 3 in a state of being positioned by
the magnet guide 3a, and a jig (not shown) so that a magnetic gap g is formed between the
through hole 4a of the upper yoke 4 and the center pole 1 The magnet 2 and the upper yoke 4
are bonded to each other in a state where the lower yoke 3 is positioned, the lower yoke 3, the
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magnet 2 and the upper yoke 4 are integrated to assemble the magnet unit 101, and the magnet
2 is magnetized.
[0011]
Next, the upper surface of the yoke 4 and the bottomed portion 5c of the frame 5 are aligned,
and the bottomed portion 5c and the upper yoke are aligned with the center of the opening 5d
aligned with the center of the center pole 1 with a jig (not shown). 4 by spot welding to integrate
the magnet unit 101 and the frame unit 102.
[0012]
The voice coil bobbin 8 is inserted into the magnetic gap g with the side from which the voice
coil lead wire is drawn as the frame portion 102, and the distance between the voice coil 8a and
the opening 4a, the distance between the voice coil bobbin 8 and the center pole 1, and the voice
coil The center of the winding width of 8a and the center of the magnetic gap length s are
positioned using a jig (not shown).
This jig is inserted between the voice coil bobbin 8 and the center pole 1.
[0013]
The center hole of the diaphragm damper 7b is fitted to the side of the voice coil bobbin 8 from
which the voice coil lead wire 11 is pulled out, and the peripheral portion of the diaphragm
damper 7b is in contact with the support portion 9b. 8 and adhesively bond the peripheral
portion of the diaphragm damper 7b and the support portion 9b.
[0014]
Then, the center hole of the diaphragm damper 7a is fitted on the side of the voice coil bobbin 8
from which the voice coil lead wire 11 is pulled out, and the peripheral portion of the diaphragm
damper 7a is in contact with the support portion 9a. The voice coil bobbin 8 is adhered, the
peripheral portion of the diaphragm damper 7a and the support portion 9a are adhered, and the
first and second diaphragm dampers 7a and 7b and the voice coil bobbin 8 are integrated to
form first and second diaphragm dampers. A space 7c is formed between 7a and 7b, and the
voice coil bobbin 8 is supported by the support portions 9a and 9b via the diaphragm dampers
7a and 7b.
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[0015]
A through hole provided at the center of the diaphragm 6 is fitted on the side where the voice
coil lead wire 11 of the voice coil bobbin 8 is drawn out, and the rib 6b is in contact with the
mount 5a. A through hole provided at the center is adhered, the rib 6b and the mount 5a are
adhered, and the diaphragm 6 is supported by the mount 5a through the edge 6a.
[0016]
The voice coil lead wire 11 is laid along the back surface 6a of the diaphragm 6 up to the voice
coil lead wire terminal 13, and the end of the voice coil lead wire 11 laid in this way, one end of
the flexible signal wire 14 and the voice coil lead wire The terminal 13 is soldered, the other end
of the flexible signal line 14 and the drive signal input terminal 12 are soldered, the voice coil 8a
and the drive signal input terminal 12 are connected, and the jig is removed.
[0017]
Then, with the center cap 15 covering the upper end of the voice coil bobbin 8, the center cap 15
and the diaphragm are bonded, and the upper surface of the rib 6b and the gasket 10 are bonded
to assemble the speaker 100.
[0018]
In a speaker using such a cone-shaped diaphragm 6, a voice coil 8a for driving the diaphragm 6
in order to lower the minimum resonance frequency value and enable driving with a large input.
Needs to be able to drive with a large amplitude.
[0019]
Then, even when the voice coil 8 is driven with such a large amplitude, it is necessary to keep the
vibration direction of the voice coil 8 always in line with the axial direction of the center pole 1,
otherwise the reproduced sound will be distorted. I have a problem.
[0020]
As a speaker proposed for the purpose of solving this problem, like the speaker 100 shown and
described in FIG. 4, the axial direction of the center pole 1 with respect to the first diaphragm
type damper 7a and the first diaphragm type damper 7a As a structure for supporting the voice
coil 8a by providing a second diaphragm type damper 7b disposed closer to the voice coil 8a
with a gap 7c between them, the vibration direction of the voice coil 8 driven with large
amplitude is the axis of the center pole 1 An example is known in which the direction is kept.
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[0021]
However, in the speaker 100 having such a structure, the axial dimension of the center pole 1 of
the voice coil bobbin 8 is increased by the distance 7c, so that the lead-out length of the voice
coil lead wire 11 is increased. Since the voice coil lead wire terminal 13 is provided at the
extension end portion along with the cone-shaped diaphragm 6, the inertia mass of the vibrating
portion including the voice coil bobbin 8 and the cone-shaped diaphragm 6 is increased. There is
a problem that the playback sound quality is adversely affected.
Further, since it is necessary to pass the voice coil lead wire 11 between both the first diaphragm
type damper 7a and the second diaphragm type damper 7b and the voice coil bobbin 8, there is a
problem that the assembling operation of the speaker 100 becomes complicated.
[0022]
In view of such a point, the present invention uses the voice coil lead wire 11 as the cone-shaped
diaphragm 6 in the speaker 100 in which the bobbin of the voice coil is supported by the
plurality of dampers 7a and 7b arranged at intervals. It is pulled out from the voice coil bobbin 8
without extending it together to reduce the inertial mass of the cone-shaped diaphragm 6, and
solves the problem that the reproduction sound quality is adversely affected, and solves the
problem that the assembly work of the speaker becomes complicated. It aims at providing the
illustrated speaker.
[0023]
SUMMARY OF THE INVENTION The present invention relates to a speaker in which a plurality of
damper members 7a and 7b disposed at a distance from each other to support a bobbin 8 of a
voice coil. Pull out the lead wire 11 of the voice coil 8a from the portion of the bobbin 8 to
control the increase of the inertial mass of the cone-shaped diaphragm 6 and solve the problem
that the reproduced sound quality is adversely affected and the assembly operation of the
speaker 100 becomes complicated. planned.
[0024]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a loudspeaker
according to the present invention will be described below with reference to FIGS. 1 to 3B.
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[0025]
An embodiment of a speaker according to the present invention is shown in FIG. 1, and the same
parts as those shown in FIG. 4 are given the same reference numerals and detailed explanation
thereof is omitted.
[0026]
In FIG. 1, 100M is a central cross-sectional view showing the main part of the speaker, and the
speaker 100M is composed of a magnet unit 101, a frame unit 102, a cone paper unit 103, a
voice coil unit 104 and a signal line extraction unit 105a.
[0027]
A voice coil bobbin 8 between the voice coil lead wire 11a from the voice coil 8a, the drive signal
input terminal 12a, the flexible signal wire 14a and the first diaphragm type damper 7a and the
second diaphragm type damper 7b from the signal line lead portion 105a. The voice coil lead
wire terminal 13a formed in FIG.
[0028]
A window portion 5e is provided in the hollow cylindrical portion 5i, and a drive signal input
terminal 12a having an external signal input terminal 12c and a connection portion 12b is
provided in the mounting portion 5j by extending the connection portion 12b to the window
portion 5e.
[0029]
The voice coil bobbin 8 is inserted into the magnetic gap g with the side from which the voice
coil lead wire is drawn facing the frame portion 102 and the voice coil lead terminal 13a formed
on the voice coil bobbin 8 directed to the connecting portion 12b. The distance between the
space 8a and the opening 4a, the distance between the voice coil bobbin 8 and the center pole 1,
the center of the winding width of the voice coil 8a and the center of the magnetic gap length s
are positioned using a jig (not shown).
[0030]
The voice coil lead 11a is laid along the outer surface of the voice coil bobbin 8 from the voice
coil 8a to the position of the voice coil lead terminal 13a, and the lead 11a is bonded to the outer
surface of the voice coil bobbin 8.
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[0031]
The second diaphragm type damper 7b is fitted to the voice coil bobbin 8, and the damper 7b is
inserted to a position where the outer peripheral side of the damper 7b is in contact with the stay
9b, and this fitting of the voice coil bobbin 8 and the second diaphragm type damper 7b The
parts are adhered, and the outer peripheral side of the diaphragm type damper 7b is adhered to
the stay 9b.
[0032]
The voice coil lead wire terminal 13a is connected by soldering to the free end of the voice coil
lead wire 11a on the laying side and one end of the flexible signal wire 14a, and the other end of
the flexible signal wire 14a is connected to the drive signal input terminal 12a. The portion 12b
is connected by soldering, and the voice coil 8a and the drive signal input terminal 12c are
connected.
[0033]
The first diaphragm-type damper 7a is fitted to the voice coil bobbin 8, and the damper 7a is
inserted to a position where the outer peripheral side of the damper 7a contacts the stay 9a, and
the voice coil bobbin 8 is fitted to the first diaphragm-type damper 7a. The outer peripheral side
of the first diaphragm type damper 7a is adhered to the stay 9a.
[0034]
Then, the through hole portion provided at the center of the cone-shaped diaphragm 6 is fitted to
the voice coil bobbin 8, and the rib 6b of the cone-shaped diaphragm 6 is inserted until it
contacts the mount portion 5a. The coil bobbin 8 is adhered, the rib 6b on the outer peripheral
side of the cone-shaped diaphragm 6 is adhered to the mount 5a of the frame 5, the gasket 10 is
adhered on the rib 6b, and this jig (not shown) is removed. To assemble the speaker 100M
shown in FIG.
[0035]
According to the embodiment of the speaker shown in FIG. 1, the voice coil lead wire terminal
13a provided on the voice coil bobbin 8 and the drive signal input terminal 12a can be directly
connected.
[0036]
Therefore, since it is not necessary to draw the voice coil lead wire 11 as far as the cone-shaped
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diaphragm 6 as in the conventional speaker 100 shown and described in FIG. 4, the increase in
inertia mass of the cone-shaped diaphragm 6 is suppressed. Therefore, it is possible to solve the
problem that the reproduction sound quality is adversely affected, and to solve the problem that
the assembly operation of the speaker becomes complicated.
[0037]
Next, FIGS. 2A and 2B show another embodiment of the speaker according to the present
invention, and the same parts as those shown in FIGS. 1 and 4 are assigned the same reference
numerals and detailed explanations thereof will be omitted. explain.
[0038]
FIG. 2A is a plan view showing another embodiment of the diaphragm type damper according to
the present invention of the speaker, and FIG. 2B is a center sectional view showing another
embodiment of the speaker according to the present invention to which this diaphragm type
damper is applied. is there.
[0039]
In the embodiment of the speaker 100N shown in FIG. 2B according to the present invention, the
through hole 7c is provided in the first diaphragm type damper 71a as shown in FIG. 2A.
The drive signal input terminal 12 is provided between the mount 5a of the frame 5 and the
window 5b provided in the regular wall 5f.
[0040]
The voice coil bobbin 8 is inserted into the magnetic gap g and positioned with the voice coil lead
wire terminal 13a facing the connecting portion 12c, and the center hole of the second
diaphragm type damper 7b with respect to the positioned voice coil bobbin 8 Are inserted and
adhered, and the periphery of the damper 7b is adhered to the stay 9b.
These insertion, positioning and bonding are performed in the same manner as shown and
described in FIG.
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[0041]
The voice coil lead wire terminal 13a, the free end of the voice coil lead wire 11a, and one end of
the flexible signal wire 14b are connected by soldering.
[0042]
A state in which the center hole of the first diaphragm type damper 71a whose side on which the
through hole 7c is provided is the connection portion 12c is fitted to the voice coil bobbin 8, and
the outer peripheral side of the first diaphragm type damper 71a contacts the stay 9a Then, the
fitting portion with the voice coil bobbin 8 is adhered, and the outer peripheral side is adhered to
the stay 9a.
[0043]
The other end of the flexible signal line 14b is pulled out between the frame 5 and the
diaphragm 6 through the through hole 7c, and the other end is soldered to the connecting
portion 12b of the drive signal input terminal 12a to drive the voice coil lead 11 Connect to the
input terminal 12a.
[0044]
Then, the through hole provided at the center of the cone-shaped diaphragm 6 is fitted to the
voice coil bobbin 8 and inserted until the rib 6b contacts the mount portion 5a, and the coneshaped diaphragm 6 and the voice coil bobbin 8 are bonded to each other. Is adhered to the
mount portion 5a, the gasket 10 is adhered onto the rib 6b, the jig (not shown) is removed, the
cap 15 is attached, and the speaker 100N shown in FIG. 1 is assembled.
[0045]
According to another embodiment of the speaker shown in FIG. 2B, the flexible signal line 14b is
drawn directly from the terminal 13a provided on the voice coil bobbin 8 and soldered to the
connection portion 12c of the drive signal input terminal 12. A signal input circuit for the voice
coil 8a can be configured.
Since the voice coil lead wire terminal 12 can be provided on the same side surface 5 f as the
conventional speaker 100, the position of the terminal 12 can be maintained compatible with the
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conventional speaker 100.
[0046]
Therefore, according to another embodiment of the speaker shown in FIGS. 2A and 2B according
to the present invention, in the speaker 100N in which the voice coil bobbin 8 is supported by a
plurality of dampers 71a and 7b arranged at intervals. The voice coil lead wire 11 can be drawn
directly from the terminal 13a provided on the voice coil bobbin 8 to the terminal 12a without
extending the voice coil lead wire 11 in contact with the cone-shaped diaphragm 6.
[0047]
Therefore, the increase of the inertial mass of the speaker vibration system can be suppressed,
the problem of giving an adverse effect to the reproduction sound quality can be solved, and the
problem of the assembly operation of the speaker becoming complicated can be solved.
[0048]
Next, another embodiment of the diaphragm type damper according to the present invention of
the speaker based on FIG. 3A and FIG. 3B will be assigned the same reference numerals as in FIG.
4 and FIG. I omit and explain.
[0049]
FIG. 3A is a plan view showing another embodiment of the diaphragm type damper according to
the present invention of the speaker, and FIG. 3B is a central sectional view showing an
embodiment according to the present invention of the speaker 100S to which this diaphragm
type damper is applied. .
[0050]
In another embodiment according to the present invention of the diaphragm type damper shown
in FIG. 3A, the first diaphragm type damper 72a is provided with through holes 7d, 7e and 7f,
and these through holes 7d, 7e and 7f have the same size. Diaphragm type dampers having the
same shape and arranged at the same circumferential positions at equal angular intervals of 120
degrees from each other are used.
[0051]
According to another embodiment of the speaker shown in FIGS. 3A and 3B according to the
present invention, in the speaker 100N in which the voice coil bobbin 8 is supported by a
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plurality of dampers 7a and 7b arranged at intervals. Further, the voice coil lead wire 11 can be
drawn directly from the voice coil bobbin 8 to the voice coil lead wire terminal 12a without
extending along with the cone-shaped diaphragm 6, and the increase in inertial mass of the
speaker's vibration system can be suppressed. In addition to the above, it is possible to balance
the stiffness over the entire circumference of the diaphragm type damper 72a provided with the
through hole.
[0052]
The present invention is not limited to the above-described embodiment, and various other
embodiments can be taken without departing from the scope of the present invention.
[0053]
If an example is given, a damper part can take the form comprised with three or more some
dampers, without being limited to comprising this damper part by two sheets.
[0054]
The number and the shape of the through holes provided in the damper portion 7a are not
limited to the ones shown in FIGS. 2A and 3A, but may have various numbers and shapes of the
through holes.
[0055]
Then, a magnet may be provided outside the lower yoke 3 of the speaker 100N to cancel the
leakage flux from the magnet 2 and the magnetic shield type may be adopted.
[0056]
According to the present invention, the voice coil lead wire 11 is attached to the cone-shaped
diaphragm 6 in the speaker 100N in which the voice coil bobbin 8 is supported by a plurality of
dampers arranged at intervals. It can be pulled out directly from the voice coil bobbin 8 without
extension.
Accordingly, it is possible to solve the problem that the inertia mass of the cone-shaped
diaphragm 6 is increased and the reproduction sound quality is adversely affected, and to solve
the problem that the assembly operation of the speaker becomes complicated.
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[0057]
Brief description of the drawings
[0058]
1 is a cross-sectional view showing a first embodiment according to the present invention of the
speaker.
[0059]
FIG. 2A is a plan view showing another embodiment of the damper according to the present
invention.
B is a sectional view showing another embodiment of the speaker according to the present
invention.
[0060]
FIG. 3A is a plan view showing still another embodiment of the damper according to the present
invention.
B is a cross-sectional view showing still another embodiment of the speaker according to the
present invention.
[0061]
4 is a cross-sectional view showing a conventional form of the speaker.
[0062]
Explanation of sign
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[0063]
DESCRIPTION OF SYMBOLS 1 center pole, 2 magnet, 3 lower yoke, 4 upper yoke, 6 diaphragm,
7a 1st diaphragm type damper, 7b 2nd diaphragm type damper, 8 voice coil bobbins, 11, 11a
voice coil lead wire, 12, 12a Drive signal input terminal, 13a voice coil lead wire terminal, 14a,
14b tinsel wire (flexible signal wire) 7d, 7e, 7f through hole
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