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DESCRIPTION JPH10271597

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DESCRIPTION JPH10271597
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device and a method of manufacturing the speaker device.
[0002]
2. Description of the Related Art A so-called electrokinetic cone-type speaker unit is
conventionally known as an example of a speaker device for converting an electrical signal into
acoustic energy. FIG. 11 shows an example, and as shown in the figure, the cone type speaker
unit has a voice coil 102 wound around a central portion of a diaphragm (cone) 101 formed of,
for example, a part of a substantially conical shape. The cylindrical voice coil bobbin 103 is
integrally provided with the diaphragm 101.
[0003]
The diaphragm 101 and the voice coil bobbin 103 are fixed to one end of the ring-shaped edge
108 having appropriate compliance and rigidity and one end of the damper 109, and the other
end of the edge 108 and the damper 109 is integrated with the magnetic circuit 107. The
diaphragm 101 and the voice coil bobbin 103 are elastically supported on a frame 112 formed in
the
[0004]
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Thereby, the edge 108 and the damper 109 are in a predetermined position without contacting
the voice coil 102 and the voice coil bobbin 103 in the magnetic gap of the magnetic circuit 107
including the magnet 104, the plate 105, the pole yoke 106 and the like. The diaphragm 101 is
elastically supported in a predetermined direction so as to allow the piston to vibrate in a
predetermined amplitude range.
[0005]
Further, both ends of the voice coil 102 are respectively connected to one end of a pair of
conductive lead wires 111, and the other ends of the pair of lead wires 111 are connected to a
pair of terminals 110 provided on the frame 112. There is.
[0006]
Therefore, according to the voice current supplied from the terminal 110 to the voice coil 102
through the conductive lead wire 111, the voice coil 102 is in the magnetic gap of the magnetic
circuit 107 along the piston vibration direction of the diaphragm 101. By being driven, the
diaphragm 101 vibrates integrally with the voice coil 102 and the voice coil bobbin 103,
converts an electrical signal into acoustic energy, and emits an acoustic wave.
[0007]
Further, the center cap 113 is fixed on the diaphragm 101 so as to close a central hole provided
at the central portion of the diaphragm 101, and is integrally provided with the diaphragm 101
so that the diaphragm 101 and the voice coil 102 are provided. The structural strength is
reinforced, and the divided vibration of the diaphragm 101 and the voice coil 102 is suppressed
as much as possible.
[0008]
In addition, since the center cap 113 vibrates integrally with the diaphragm 101, the acoustic
characteristics are corrected by phase-correcting the interference of sound waves caused by a
part of the acoustic radiation power (mainly the high frequency range) or the shape of the
diaphragm 101. The effect of the acoustic characteristics caused by the central hole provided at
the central portion of the diaphragm 101 is corrected as necessary.
[0009]
A conventional electrodynamic-type cone-type speaker unit is configured as described above, and
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is formed, for example, by the manufacturing method shown in FIGS. 12 and 13 below.
13 (a) to 13 (d) are diagrams showing, in the order of steps, a method of manufacturing the coneshaped speaker unit shown in FIG. 11, and FIG. 12 is a diagram showing the previous step of FIG.
The steps will be described below in order.
[0010]
First, the pre-process will be described with reference to FIG.
FIG. 12 is a cross-sectional structural view showing the structure of the coil gauge 114 together
with the pre-process in which the coil gauge 114 is incorporated in advance in the frame ASSY
formed by attaching the frame 112 to the magnetic circuit 107 in advance.
[0011]
FIG. 12 (a) shows the structure of the coil gauge 114. The coil gauge 114 is, for example, a
cylindrical coil holding portion 114b made of a resin film or the like having a predetermined
thickness on the cylindrical side surface of the main portion 114a made of metal. Is fixed.
[0012]
The cylindrical side outer diameter D1 of the main body portion 114a (ie, the inner diameter of
the coil holding portion 114b) is substantially equal to the diameter of the center pole located at
the central portion of the pole yoke 106, and the coil holding portion 114b is shown in FIG. As
shown, it is dimensioned to be releasably matable by the center pole.
[0013]
Further, as shown in FIG. 12B, the outer diameter D2 of the holding portion 114b is substantially
equal to the inner diameter D3 of the voice coil bobbin 103, and the coil holding portion 114b
can hold the voice coil bobbin 103 in a detachable manner. As dimensioned.
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[0014]
The coil gauge 114 has such a structure, and the voice coil bobbin 103 on which the voice coil
102 is wound is fitted and attached in advance as shown in FIG. 12 (b), and then, as shown in
FIG. 12 (c). As shown, by fitting and mounting on the center pole of the magnetic circuit 107, a
pre-process of holding the voice coil bobbin 103 is performed.
[0015]
Thus, the voice coil bobbin 103 and the voice coil 102 are held without coming into contact with
the center pole of the pole yoke 106 and the plate 105 in the magnetic gap of the magnetic
circuit 107, and positioning with respect to the pole yoke 106 and the plate 105 is performed. .
[0016]
Next, each process shown in FIG. 13 will be described.
First, as shown in FIG. 13A, the damper 109 is placed at a predetermined position of the abovementioned frame ASSY, and then the voice coil bobbin 103 and the voice coil 102 are fitted and
mounted by the above-described pre-process. After the coil gauge 114 is inserted into the center
hole of the damper 109, the coil gauge 114 is fitted and mounted to the center pole of the pole
yoke 106.
[0017]
Next, the inner peripheral side and the outer peripheral side of the damper 109 are fixed to the
voice coil bobbin 103 and the frame ASSY by an adhesive or the like.
At this time, both ends of the voice coil 102 are drawn longer on the upper surface side of the
damper 109.
[0018]
Next, as shown in FIG. 13B, the diaphragm 101, to which the edge 108 is attached in advance, is
placed from above the frame ASSY to perform positioning with respect to the voice coil 102, and
then using an adhesive or the like The outer peripheral portion of the edge 108 is attached and
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fixed to the frame ASSY and the inner peripheral portion of the diaphragm 101 is attached and
fixed to the voice coil bobbin 103.
[0019]
At this time, since the movement of the voice coil bobbin 103 is restricted by the coil gauge 114,
no positional deviation between the voice coil 102 and the diaphragm 101 occurs during the
fixing operation of the diaphragm 101.
[0020]
Next, as shown in FIG. 13C, after both ends of the voice coil 102 are soldered to an eyelet or the
like provided in advance on the diaphragm 101, the coil gauge 114 is pulled out from the voice
coil bobbin 103.
[0021]
Next, as shown in FIG. 13D, the center cap 113 is fixed to the central portion of the diaphragm
101 with an adhesive or the like, and a pair of lead wires 111 is used on the back side of the
diaphragm 101. A cone-shaped speaker unit is formed by connecting both ends of the voice coil
102 to the pair of terminals 110, respectively.
[0022]
Thus, in the case of manufacturing a cone type speaker unit, it is necessary to accurately
maintain the relative position of each other until the diaphragm 101 and the damper 109 are
adhered and fixed to the voice coil bobbin 103, and the coil gauge 114 is necessary.
For this reason, the central portion of the diaphragm 101 is provided with a central hole whose
diameter is slightly larger than the maximum outer diameter of the coil gauge 114.
[0023]
Since the diaphragm 101 has a reduced structural strength because the center hole is open, the
center cap 113 is usually used to reinforce the diaphragm 101. However, originally, the
diaphragm 101 has a certain thickness. It is desirable that the whole vibration plate 101 be
integrally formed including the shape of the center cap 113 in order to form it with high rigidity.
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[0024]
That is, it is desirable that the diaphragm 101 has high rigidity, and it is desirable that sound
waves radiated from the respective regions of the diaphragm be radiated in the same phase as
much as possible without interference with one another. There is an integrated diaphragm such
as a flat diaphragm made of a material having
[0025]
FIG. 14 is a view showing an example of a flat speaker unit using a flat diaphragm together with
part of its manufacturing process.
In FIG. 14, the same parts as in FIGS. 11 to 12 are given the same reference numerals.
[0026]
The manufacturing method of this flat speaker unit is performed in the following process order.
That is, first, as shown in FIG. 14 (a), the damper 109 is placed at a predetermined position of the
frame ASSY formed by attaching the frame 115 for the flat speaker unit to the magnetic circuit
107 in advance, After inserting the coil gauge 114 in which the voice coil bobbin 103 and the
voice coil 102 are fitted and mounted to the center hole of the damper 109 by the pre-process
shown in FIG.
[0027]
Next, the inner peripheral side and the outer peripheral side of the damper 109 are fixed to the
voice coil bobbin 103 and the frame ASSY by an adhesive or the like.
At this time, both ends of the voice coil 102 are drawn longer on the upper surface side of the
damper 109.
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[0028]
Next, as shown in FIG. 14 (b), after connecting both ends of the voice coil 102 and the pair of
terminals 110 using the pair of lead wires 111, the coil from the voice coil bobbin 103 fixed to
the damper 109 Remove the gauge 114.
[0029]
Next, as shown in FIG. 14C, the flat diaphragm 117 having a planar shape to which the edge 116
is attached in advance is placed from above the frame ASSY to position the voice coil 102, and
then an adhesive or the like is performed. The outer peripheral portion of the edge 116 is
attached and fixed to the frame ASSY, and the back side of the diaphragm 117 is attached and
fixed to the voice coil bobbin 103.
[0030]
Since the flat speaker unit is manufactured as described above, it is not necessary to reinforce the
diaphragm by the center cap 113 as in the case of the method of manufacturing the cone
speaker unit described above.
[0031]
The connection work of the lead wire 111 in the flat speaker unit is performed before fixing the
diaphragm 117 as described above, but in the case of a cone type speaker unit, the diaphragm
101 has a substantially conical shape. Since it is formed in part, a sufficient space where
connection work of lead wire 111 can be easily performed is secured on the back side of
diaphragm 101 even after diaphragm 101 is fixed, but the flat speaker unit In this case, since the
diaphragm 117 has a planar shape and the space between the diaphragm 117 and the damper
109 is narrow, the connection work of the lead wire 111 is difficult.
[0032]
However, as described above, in the speaker unit of this type, as described above, in the
manufacturing process, the coil gauge 114 is removed and the diaphragm is supported against
the voice coil bobbin 103 which is only floatingly supported by the damper 109. Since the
position 117 is fixed by the positioning, the voice coil bobbin 103 and the diaphragm 117 may
be displaced during the fixing operation, and the position may not be fixed according to the
initial positioning.
[0033]
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As a result, the relative position between the voice coil 102 of the speaker unit and the magnetic
circuit 107 shifts, or the voice coil 102 or the voice coil bobbin 103 contacts the pole yoke in the
gap of the magnetic circuit 107. It becomes difficult to faithfully convert the signal into acoustic
energy and reproduce it.
[0034]
For this reason, in the conventional flat speaker unit, the compliance of the damper 109 and the
edge 116 is set within a certain range, and the flat speaker unit is manufactured within a range
that does not hinder the fixing operation of the voice coil bobbin 103 and the diaphragm 117. It
was
[0035]
However, the compliance of the damper 109 and the edge 116 is the case where the lower
resonance frequency (f0) of the flat speaker unit is lowered to expand the reproduction range of
the low range, or the amplitude of the voice coil 102 is enlarged to increase the sound pressure
of the diaphragm 117. It is necessary to set the value large in order to increase the acoustic
characteristics such as the reproduction frequency band and the maximum sound pressure of the
flat speaker unit, but as long as the above-mentioned manufacturing method is used, There is a
limit in setting the compliance of the damper 109 and the edge 116, and it is difficult to improve
the acoustic characteristics of the speaker unit.
[0036]
The present invention has been made in view of the above-described problems, and provides a
speaker device that can be easily manufactured and that has good acoustic characteristics, and a
method of manufacturing the same.
[0037]
According to a first aspect of the present invention, there is provided a loudspeaker apparatus
characterized in that a positioning portion for positioning the diaphragm is provided on the back
side of the diaphragm.
[0038]
The invention according to claim 2 is the speaker device according to claim 1, wherein the
positioning portion is positioned with respect to the magnetic circuit of the magnetic circuit by
engaging with a jig which protrudes through a central hole of the magnetic circuit. It is
characterized in that
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[0039]
The invention according to claim 3 is characterized in that, in the speaker device according to
claim 2, the diaphragm is supported at a predetermined position by a jig fitted with the
positioning portion.
[0040]
The invention according to claim 4 is characterized in that a positioning member for positioning
the diaphragm is fixed to the back surface side of the diaphragm.
[0041]
The invention according to claim 5 is the speaker apparatus according to claim 4, wherein the
positioning member is positioned with respect to the magnetic circuit of the magnetic circuit by
fitting with a jig which protrudes through the central hole of the magnetic circuit. A diaphragm
positioning unit is provided.
[0042]
The invention according to claim 6 is characterized in that, in the speaker device according to
claim 5, the positioning member is provided with a joint portion joined to the coil.
[0043]
The invention according to claim 7 is characterized in that the speaker apparatus according to
any one of claims 1 to 6 further comprises a feed damper including a feed portion electrically
connected to the coil.
[0044]
The invention according to claim 8 is characterized in that in the speaker device according to
claims 1 to 7, the diaphragm is integrally formed with a center cap.
[0045]
The invention according to claim 9 further comprises the steps of: fixing the magnetic circuit and
the frame; positioning the coil with respect to a center pole of the magnetic circuit; and
connecting a damper between the coil and the frame; A step of causing the jig to protrude from a
central hole of the pole, a step of fitting the positioning member provided on the back surface
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side of the diaphragm and the jig and positioning the diaphragm with respect to the center pole,
And a step of connecting to a coil and a frame.
[0046]
According to a tenth aspect of the present invention, in the speaker device manufacturing
method according to the ninth aspect, the damper is a feed damper including a feed portion, and
has a step of electrically connecting the feed portion and the coil.
[0047]
The invention according to claim 11 is characterized in that, in the method for manufacturing a
speaker device according to any one of claims 9 to 10, the diaphragm is integrally formed with a
center cap.
The invention according to claim 12 is a speaker apparatus characterized in that the entire
diaphragm is integrally formed and the damper includes a feed line to the coil.
[0048]
Since the present invention is configured as described above, the positioning member of the
positioning unit can be formed by fitting the jig projecting through the center hole of the
magnetic circuit to the positioning unit provided on the back surface of the diaphragm. The
diaphragm is positioned at a predetermined position with respect to the magnetic circuit, the coil
is joined to the joint provided in the positioning unit, and the feed unit provided to the feed
damper is joined to the joint to electrically connect the feed unit to the coil. Since the connection
is made, the diaphragm can be reliably positioned and fixed with respect to the magnetic circuit,
and the coil and the diaphragm are fixed without breaking the positional relationship between
the coil and the diaphragm initially positioned. Work can be done.
Therefore, it is possible to easily manufacture a speaker device in which the positioning of the
coil and the diaphragm with respect to the magnetic circuit is well performed, and the speaker
device having better acoustic characteristics as compared with the conventional speaker device
integrally formed with the whole diaphragm. Can be provided.
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[0049]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of
the present invention will be described below based on the drawings.
FIG. 1 is a cross-sectional view of an essential part of an electrodynamic type cone-shaped
speaker unit according to an embodiment of the present invention.
In the figure, the diaphragm 1 is formed, for example, by integral molding of paper or resin so as
to have a parabolic shape having substantially the same thickness in cross section.
[0050]
Therefore, since the diaphragm 1 is formed of a curved surface which is entirely closed within
the substantially circular area to which the ring-shaped edge 2 having both proper compliance
and rigidity is attached, the voice coil bobbin as in the prior art There is no circular opening for
inserting the.
[0051]
Further, in the vicinity of the center on the back surface side of the diaphragm 1, a holder 3
made of, for example, an ABS resin or the like is fixedly formed integrally with the diaphragm 1.
[0052]
In addition, the holder 3 is engaged with a voice coil ASSY (hereinafter referred to as a coil)
formed by winding the voice coil 4 and fixing it to the cylindrical voice coil bobbin 5, and the
diaphragm 1, voice coil 4, voice It is integrally fixed to the coil bobbin 5.
[0053]
Further, the holder 3 and the voice coil bobbin 5 are fixed to the inner peripheral side of a ringshaped damper 6 having both proper compliance and rigidity.
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11
Further, the outer peripheral sides of the edge 2 and the damper 6 are fixed to a frame 11
integrally formed with the magnetic circuit 10 formed of the magnet 7, the plate 8, the pole yoke
9 and the like.
[0054]
The pole yoke 9 formed by the magnetic circuit 10 has a shape in which a substantially
cylindrical center pole is erected at the center of a circular plate for mounting the magnet 7, and
a cylindrical center hole 9a coaxial with the center pole. Is formed through.
[0055]
Further, the edge 2 and the damper 6 have a cross-sectional shape capable of obtaining a
predetermined amplitude, and elastically support the diaphragm 1, the holder 3, the voice coil 4
and the voice coil bobbin 5 together.
[0056]
Thereby, the edge 2 and the damper 6 arrange the voice coil 4 and the voice coil bobbin 5 at a
predetermined position in the magnetic gap of the magnetic circuit 10 without contacting the
magnetic circuit, and the diaphragm 1 has a predetermined direction in a predetermined
direction. Elastically supports the piston in an amplitude range so that it can vibrate.
[0057]
Further, both ends of the voice coil 4 are connected to one end sides of a pair of feed lines (not
shown) provided in the damper 6, and the other ends of the pair of feed lines are provided on the
frame 11. Each of the pair of terminals 12 is electrically connected.
[0058]
Therefore, according to the voice current supplied to the voice coil 4 from the terminal 12
through the feed line provided to the damper 6 from the terminal 12, the piston vibration
direction of the diaphragm 1 in the magnetic gap of the magnetic circuit 10 By being driven
along, the diaphragm 1 vibrates integrally with the holder 3, the voice coil 4 and the voice coil
bobbin 5 to convert an electrical signal into acoustic energy to emit an acoustic wave.
The cone-type speaker unit in the embodiment of the present invention generally has such a
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12
structure.
[0059]
Next, the detailed structure of the main parts of the cone-shaped speaker unit will be described.
First, the details of the diaphragm 1 will be described.
FIG. 2 is a cross-sectional detail view showing an example of the diaphragm 1, wherein (a) shows
the cross-sectional shape of the diaphragm 1 in the state where the edge 2 is attached, and (b)
shows the arrow A in (a). The enlarged view of the part is shown, respectively.
As shown in FIG. 2B, on the back surface side of the diaphragm 1, holder mounting portions 1a
and 1b formed of ring-shaped protrusions are provided coaxially with the central axis X of the
diaphragm, respectively.
[0060]
Next, the details of the holder 3 will be described.
FIG. 3 is a structural view showing an example of the holder 3. (a) shows a view from the top, (b)
shows a view from the side, and (c) shows a view from the bottom , (D) shows a cross-sectional
view seen from the side.
[0061]
As can be seen from FIG. 3, on the bottom surface side of the holder 3, guides 3 a and 3 b formed
of ring-shaped protrusions and a circular guide hole 3 c are provided coaxially with the central
axis Y, respectively.
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The shape and dimensions of the inner surface side of the guide 3a are set such that a jig 14
used in a manufacturing process described later of the cone type speaker unit can be disengaged
and fitted.
[0062]
Further, the shape and dimensions of the guide 3 b are set such that the inner surface side is
fitted to the voice coil bobbin 5.
Further, the shape and size of the guide hole 3 c are set so as to be fitted to the holder mounting
portion 1 a of the diaphragm 1.
Further, the maximum outer diameter of the holder 3 is restricted so that the holder 3 can be
attached to the diaphragm 1 inside the holder attachment portion 1b.
[0063]
FIG. 4 is a view showing a state in which the diaphragm 1 and the jig 14 are fitted to the holder
3.
As can be seen from the drawing, the dimensions and shapes of the surfaces in which the
diaphragm 1 and the holder 3 are in contact with each other are set so as to be in close contact
with each other when the guide hole 3c is fitted with the guide 3a.
[0064]
Further, as described above, the surface where the diaphragm 1 and the holder 3 contact with
each other is fixed by an adhesive or the like, but in this case, the adhesive of the holder
mounting portion 1b protrudes outside the holder mounting portion 1b. There is also a role of
regulating so that the mass balance of the diaphragm 1 including the adhesive does not become
extremely asymmetric with respect to the central axis X.
[0065]
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14
Further, as shown in FIG. 4, when the diaphragm 1 and the holder 3 are fitted and fixed, the
central axis X of the diaphragm 1 and the central axis Y of the holder 3 coincide with each other,
so the diaphragm 1 and the holder 3 Maintaining the same axis precisely with each other and
integrating.
[0066]
Next, the details of the damper 6 will be described.
FIG. 5 is a structural view showing an example of the damper 6, wherein (a) shows a view from
the top, and (b) shows a partial perspective view.
As shown in the figure, the damper 6 is, for example, a pair of feed lines 6a having conductivity
made of copper foil or the like on the surface of a so-called corrugation damper in which resin is
impregnated into a resin and heat-formed to form concentric irregularities. 6b is attached and
formed in a ring shape.
[0067]
The pair of feed lines 6a and 6b may be formed by impregnating a resin with a resin and heating
and forming the same, and then radially disposed along the concentric unevenness on the
adhesive with a bonding agent or the like, or may be previously formed by heating. It may be
formed on a cloth in advance and formed into irregularities by heat molding.
Further, a central hole 6 c for inserting a coil is provided in the central portion of the damper 6.
The cone-type speaker unit in the embodiment of the present invention is configured as
described above.
[0068]
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15
Next, a method of manufacturing a cone-type speaker unit according to an embodiment of the
present invention will be described below.
6 and 7 are views showing an example of a method of manufacturing a cone type speaker unit in
the embodiment of the present invention in the order of steps, and FIG. 6 is a front step of FIG.
The steps will be described below in order.
[0069]
First, the pre-process will be described with reference to FIG.
FIG. 6 is a cross-sectional structural view showing, together with the structure of the coil gauge
13, a pre-process in which the coil gauge 13 is previously incorporated in a frame ASSY formed
by attaching the frame 11 to the magnetic circuit 10 in advance.
[0070]
FIG. 6A shows the structure of the coil gauge 13. The coil gauge 13 has a predetermined
thickness on the cylindrical side surface of the main body 13a made of, for example, metal as in
the conventional coil gauge 114 described above. A cylindrical coil holding portion 13b made of
a resin film or the like is fixed.
[0071]
The outer diameter of the cylindrical side surface of the main body 13a (ie, the inner diameter of
the coil holding portion 13b) D4 is substantially equal to the outer diameter of the center pole
located at the central portion of the pole yoke 9, and the coil holding portion 13b is shown in
FIG. As shown in Fig. 4, the center pole is dimensioned to be releasably engageable.
[0072]
Further, as shown in FIG. 6B, the outer diameter D5 of the coil holding portion 13b is
substantially equal to the inner diameter D6 of the voice coil bobbin 5, and the coil holding
portion 13b holds the voice coil bobbin 5 in a detachable manner. It is dimensioned to be able to.
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[0073]
The coil gauge 13 has such a structure, and in advance, as shown in FIG. 6 (b), the voice coil
bobbin 5 around which the voice coil 4 is wound is fitted and attached, and then, as shown in
FIG. As shown, by fitting and mounting on the center pole of the magnetic circuit 10, a preprocess of holding the voice coil bobbin 5 is performed.
[0074]
Thus, the voice coil bobbin 5 and the voice coil 4 are held in the magnetic gap of the magnetic
circuit 10 without coming into contact with the center pole of the pole yoke 9 and the plate 8
and positioning with respect to the pole yoke 9 and plate 8 is performed. .
[0075]
Next, each process shown in FIG. 7 will be described.
First, as shown in FIG. 7A, the damper 6 is placed at a predetermined position of the abovementioned frame ASSY, and then the above-mentioned coil is fitted and mounted by the previous
process shown in FIG. After the coil gauge 13 is inserted into the center hole 6c of the damper 6,
the coil gauge 13 is fitted and mounted in the center hole 9a of the pole yoke 9, and the coil is
disposed at a predetermined position.
[0076]
Next, the inner peripheral side and the outer peripheral side of the damper 6 are adhered to the
voice coil bobbin 5 and the frame ASSY by an adhesive or the like.
At this time, both end sides of the voice coil 4 are drawn longer on the upper surface side of the
damper 6.
[0077]
Next, after the damper 6 is fixed to the voice coil bobbin 5 and the frame ASSY, the voice coil 4 is
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electrically connected to the pair of feed lines 6a and 6b near the center hole 6c of the damper 6,
and The other ends of the feed lines 6a and 6b (i.e., the outer peripheral side of the damper 6)
are electrically connected to the pair of terminals 12, respectively.
[0078]
In this state, since the diaphragm 1 is not fixed to the damper 6 and the voice coil bobbin 5 yet, it
is necessary to perform connection processing of each end of the feed lines 6a and 6b in a
narrow space between the damper and the diaphragm as in the prior art. In addition, since the
voice coil bobbin 5 can be fixed to the coil gauge 13, it can be performed easily, stably and
surely.
After the feed lines 6a and 6b are connected to the voice coil 4 and the terminal 12, the coil
gauge 13 is pulled out of the voice coil bobbin 5 and separated.
[0079]
Next, as shown in FIG. 7B, the jig 14 is inserted from the bottom of the pole yoke 9 into the
center hole 9a to project from the center pole.
[0080]
FIG. 8 shows a schematic cross-sectional view of the jig 14.
The jig 14 is made of, for example, a material having excellent wear resistance, processing
accuracy, and processability, such as Delrin, and has a predetermined height at the center of the
disk-shaped base 14a, as shown in FIG. A cylindrical upright portion 14b is provided and
integrally formed.
[0081]
As can be seen from the figure, the upright portion 14b has an outer diameter (D7) in the vicinity
of the base on the base 14a side so that it can be disengaged from the center hole 9a of the pole
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yoke 9.
The outer diameter (D8) of the vicinity of the tip of the upright portion 14b is set so that the
inner surface of the guide 3a of the holder 3 can be disengaged and fitted.
[0082]
Further, the upright portion 14b has a step portion 14c having a plane parallel to the base 14a,
and as shown in FIG. 4, when the inner surface side of the guide 3a of the holder 3 is fitted to the
upright portion 14b, the guide 3a The holder 3 is formed so as to support the holder 3 by
abutting on the bottom surface of the holder 3.
The jig 14 is formed as described above.
[0083]
Further, in FIG. 7B, as shown in FIG. 7B, after the jig 14 is made to project from the center pole of
the pole yoke 9, it is projected from the innermost peripheral portion of the damper 6 and the
damper 6 After the adhesive is applied to the entire side surface of the voice coil bobbin 5, the
guide 3a of the holder 3 is fitted to the upright portion 14b and placed on the step 14c.
[0084]
As a result, the guide 3a is supported by the stepped portion 14c and the guide 3b is fixed to the
damper 6 and the coil while maintaining the predetermined position shown in FIG. 7A with
respect to the magnetic circuit.
[0085]
Next, in FIG. 7C, after applying the adhesive to the place where the edge 2 of the frame ASSY is
attached and the place where the diaphragm 1 is attached on the surface of the holder 3, the
vibration where the edge 2 is attached in advance The plate 1 (see FIG. 2) is placed from above,
and the holder mounting portion 1a of the diaphragm 1 is fitted into the center hole 3c of the
holder 3 to fix the diaphragm 1 to the holder 3 Is fixed to the frame assembly.
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Thereby, the diaphragm 1 is fixed to the holder 3 in a state of being positioned at a
predetermined position.
Next, the jig 14 is detached from the holder 3 and then pulled out from the central hole 9a,
whereby a cone-shaped speaker unit is formed.
[0086]
In the embodiment described above, the diaphragm 1 is configured as a curved surface that is
entirely closed within the substantially circular area to which the edge 2 is attached, but the
present invention is not limited to this.
That is, if the diaphragm is provided with guides 1a, 1b and the like for positioning the
diaphragm with respect to the magnetic circuit at the time of manufacturing the speaker device,
the diaphragm may have an opening.
Also, if necessary, an opening may be provided in the diaphragm and this may be closed later.
In the embodiment described above, the holder 3 and the diaphragm 1 are fixed after the damper
6 and the voice coil 4 are fixed to the holder 3. However, the holder 3 and the diaphragm 1 are
fixed in advance. After that, the damper 6 and the voice coil 4 may be fixed to the holder 3.
[0087]
Further, in the above-described embodiment, the center cap is not particularly provided, but it
may be configured to use a center cap as conventionally seen in combination as needed.
In that case, the attachment process of the center cap can be performed any time after the
process of attaching the diaphragm.
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[0088]
Further, although the pair of feed lines 6a and 6b of the damper 6 used in the cone-type speaker
unit are provided on the surface of the heat-formed cloth, the present invention is not limited to
this. For example, as shown in FIG. The feed lines 15a and 15b may be formed radially from the
center hole 15c in a state of being woven into the cloth.
FIG. 9 is a structural view showing another example of the damper 15 used in the speaker device
according to the present invention, wherein (a) shows a view from the top and (b) shows a
partially represented perspective view. .
[0089]
Further, in the embodiment described above, the holder 3 and the jig 14 are inserted so that the
upright portion 14b is inserted into the inner surface of the guide 3a so that the bottom surface
side (surface side facing the jig 14) of the holder 3 is fitted. In addition to this, for example, as
shown in FIG. 10, the holder 16 is fixed by fitting the protrusion 16a of the holder 16 fixed to the
diaphragm 1 into the recess 17a of the jig 17. It may be made to support at a predetermined
position.
[0090]
In this case, the area in which the protrusion 16a and the recess 17a are fitted can be set larger,
so that the jig 17 can support the holder 16 in a more stable state.
In addition, as shown in FIG. 10, the holder 16 has a structure in which a projection 16a is
provided in the center portion in place of the guide hole 3c of the holder 3.
Further, the jig 17 has a structure in which a recess 17 a is further provided in the jig 14.
[0091]
Further, in the method of manufacturing the speaker device using the holder 16 and the jig 17,
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the height of the guide (corresponding to the guide 3b of the holder 3) of the holder 16 fitted to
the voice coil bobbin 5 is not set too high. Can also be supported with certainty.
Therefore, the additional mass can be made as small as possible without changing the radiation
area of the diaphragm of the speaker device, and the acoustic conversion efficiency is increased.
[0092]
Since the present invention is configured as described above, the positioning member has the
positioning member provided by the jig projecting through the center hole of the magnetic
circuit being engaged with the positioning portion provided on the back surface of the
diaphragm. Positions the diaphragm at a predetermined position with respect to the magnetic
circuit, joins the coil to the joint provided in the positioning part, and joins the feed part provided
in the feed damper to the joint to electrically connect the feed part to the coil The diaphragm can
be reliably positioned and fixed with respect to the magnetic circuit, and the coil and the
diaphragm are fixed without changing the positional relationship between the coil and the
diaphragm initially positioned. It is possible to do fixed work.
Therefore, it is possible to easily manufacture a speaker device in which the positioning of the
coil and the diaphragm with respect to the magnetic circuit is well performed, and the speaker
device having better acoustic characteristics as compared with the conventional speaker device
integrally formed with the whole diaphragm. Can be provided.
[0093]
Brief description of the drawings
[0094]
1 is a diagram showing an example of a speaker device in the embodiment of the present
invention.
[0095]
2 is a cross-sectional detail view showing an example of the diaphragm.
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22
[0096]
3 is a structural view showing an example of the holder.
[0097]
4 is a diagram showing a state in which the diaphragm and the jig are fitted to the holder.
[0098]
5 is a structural view showing an example of a damper.
[0099]
6 is a diagram showing an example of a method of manufacturing a cone-type speaker unit in the
embodiment of the present invention in the order of steps.
(Pre-step of step shown in FIG. 7)
[0100]
7 is a diagram showing an example of a method of manufacturing a cone-shaped speaker unit in
the embodiment of the present invention in the order of steps.
[0101]
<Figure 8> It is the outline cross section diagram of the jig which is used for the production of
the cone type speaker unit in the execution form of this invention.
[0102]
<Figure 9> It is the block diagram which shows the other example of the damper which is used
for the speaker device which relates to this invention.
[0103]
<Figure 10> It is the figure which displays the state where the holder of the cone type speaker
unit in the other execution form of this invention fits with the jig.
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[0104]
FIG. 11 is a view showing an example of a conventional electrodynamic type cone-type speaker
unit.
[0105]
FIG. 12 is a view showing a method of manufacturing an electrodynamic type cone type speaker
unit in the prior art in the order of steps.
(Pre-step of step shown in FIG. 13)
[0106]
13 is a diagram showing, in the order of steps, a method of manufacturing an electrodynamic
type cone-type speaker unit in the related art.
[0107]
14 is a diagram showing an example of a flat speaker unit using a flat diaphragm together with a
part of its manufacturing process.
[0108]
Explanation of sign
[0109]
Reference Signs List 1: Vibration plate 1a: Holder attachment portion 1b: Holder attachment
portion 2: Edge 3: Holder 3a: Guide 3b: Guide 3c и и и Guide hole 4 и и и Voice coil 5 и и и Voice coil
bobbin и и и и и Damper 6a и и и Feeding line 6b и и и и Feeding line 6c и и и и Center Hole 7: Magnet 8:
Plate 9: Pole yoke 9a: Central hole 10: Magnetic circuit 11: Frame 12: Terminal 13
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Damper 15a: feed line 15b: feed line 15c: central
hole 16: holder 16a: projection 17 ... jig 17a иии recess
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