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JP2006295444

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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 JP2006295444
PROBLEM TO BE SOLVED: To provide a diaphragm having good characteristics. SOLUTION: An
edge formed substantially annularly with a base material of a 4-axis fabric on an outer surface
side of an outer peripheral edge of a substantially truncated vibration portion 410 which is
expanded toward one side and has a through hole 411 substantially at the center The bonding
portion 422 on the inner peripheral side of the portion 420 is attached with an adhesive to form
the diaphragm 400. The base material is woven in four different directions of axial direction
along the weft group, front oblique yarn group, back oblique yarn group, and warp group, for
example, a state in which the angle between the axial directions is about 45 °. It is a four-axis
woven fabric. The tensile strengths in the four directions in the longitudinal direction, the lateral
direction, and the oblique direction become substantially equal, and the strength balance in the
circumferential direction can be made uniform, so that good vibration of the diaphragm 400 can
be provided without causing so-called rolling. It can provide sound characteristics. [Selected
figure] Figure 1
Speaker edge, diaphragm and speaker device
[0001]
The present invention relates to a speaker edge, a diaphragm and a speaker device provided at
an end of a speaker diaphragm.
[0002]
Conventionally, as a diaphragm that constitutes a speaker device, a configuration in which a
speaker edge is attached to an end portion is known (see, for example, Patent Document 1 or
Patent Document 2).
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[0003]
The speaker edge described in Patent Document 1 is made of cotton, an aramid fiber or the like
in an edge molding member formed by molding of a rubber-based member, for example, a cloth
material having a hexagonal weave and a heat resistance such as phenol resin. It forms by
arrange | positioning the base material which thermoformed curable resin.
And it is provided in the edge part of a cone diaphragm, and the structure which elastically
supports a cone diaphragm to a speaker frame is taken.
[0004]
The speaker edge described in Patent Document 2 uses a triaxial woven fabric as an edge
substrate of a diaphragm, and coats the edge substrate with a phenol resin and a
chlorosulfonated polyethylene resin.
And this edge base material is thermoformed and cut into a predetermined shape and formed.
And the structure which adheres a diaphragm main body to the inner peripheral part of this edge
for speakers is taken.
[0005]
JP-A-2004-7357 (page 4 to page 7) JP-A-5-284594 (page 2 right column)
[0006]
However, in the conventional configuration as described in Patent Document 1 and Patent
Document 2, since it is a woven fabric such as hexagonal-shaped tortoise weave or triaxial woven
fabric, directionality occurs as a base material, and the speaker diaphragm When the speaker
diaphragm is used as a speaker device, there is a risk that the voice coil, which is a so-called
rolling, of the speaker diaphragm moves in an inclined state with respect to the axial direction.
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As a result, there is a possibility that good sound quality characteristics can not be obtained.
[0007]
An object of the present invention is to provide a speaker edge, a diaphragm, and a speaker
device which can obtain excellent characteristics in view of the above-described circumstances
and the like.
[0008]
The invention according to claim 1 is an edge for a speaker provided at an end portion of a
speaker diaphragm, wherein the linear member is formed in a substantially thin film shape and
has an axial direction extending in four different directions substantially parallel to a plane. It is a
speaker edge characterized by having provided the base material which had.
[0009]
The invention according to claim 2 is an edge for a speaker provided at an end of a speaker
diaphragm, wherein the linear member is formed in a substantially thin film shape and has an
axial direction extending in four different directions substantially parallel to a plane. A speaker
edge characterized by being formed of a base material having
[0010]
According to a ninth aspect of the present invention, there is provided a speaker edge according
to any one of the first to eighth aspects, and a substantially thin-plate shaped speaker diaphragm
portion having the speaker edge provided at an end. A diaphragm characterized in that it is
equipped.
[0011]
The invention according to claim 10 holds the diaphragm according to claim 9, a voice coil
attached to the diaphragm, a magnetic body, the diaphragm and the magnetic body, and the
magnetic body It is a speaker apparatus characterized by comprising a frame provided with a
yoke and a plate forming a magnetic circuit.
[0012]
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Hereinafter, the configuration of an embodiment of the speaker device of the present invention
will be described with reference to the drawings.
In the present embodiment, although a cone type speaker device is illustrated, the present
invention is not limited to this.
FIG. 1 is a cross-sectional view showing a speaker apparatus according to an embodiment of the
present invention.
FIG. 2 is a plan view showing a speaker edge which constitutes a part of the diaphragm of the
speaker device.
FIG. 3 is a plan view showing the weave of the base material of the speaker edge.
FIG. 4 is a cross-sectional view of the woven structure of the substrate taken along the line IV-IV
in FIG.
[0013]
[Structure of Speaker Device] In FIG. 1, reference numeral 100 denotes a speaker device. The
speaker device 100 outputs sound data, which is an electrical signal from a playback device
connected electrically, by sounding. The speaker device 100 includes a main body portion 200, a
magnet 300 as a magnetic body, a diaphragm 400, a voice coil 500, and a protection member
(not shown).
[0014]
The main unit 200 includes a frame 210 and a magnetic circuit unit 220. The frame 210 is
formed in a substantially concave shape expanded toward one side with, for example, a hard
synthetic resin or a lightweight metal material such as an aluminum alloy. Further, the frame 210
has a substantially cylindrical bottom 212 having a substantially circular opening 211 formed
substantially at the center of the bottom and opening toward one side. A first attachment step
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portion 213 having a first attachment surface 213A substantially parallel to the bottom surface
is provided at the peripheral edge portion on the side where the bottom portion 212 is expanded.
On the outer peripheral edge of the first mounting step portion 213, a plurality of bridge
portions 214 are provided in a substantially radial manner in a state where the bridge portions
214 expand at the tip end side. Furthermore, at the tip of the bridge portion 214, a second
attachment step portion 215 substantially in a ring shape and substantially parallel to the bottom
surface of the bottom portion 212 is provided in series. A positioning cylindrical portion 216
formed in a cylindrical shape substantially coaxial with the bottom portion 212 is provided in
series on the outer peripheral edge of the second mounting step portion 215. In addition, a
terminal 217 having a terminal 217A to which audio data of an electrical signal is input is
integrally attached to the frame 210.
[0015]
The magnetic circuit unit 220 includes a plate 221 and a yoke 222. The plate 221 is formed in a
substantially ring shape of a magnetic material. The plate 221 is integrally attached to the
bottom surface of the frame 210 with an adhesive, for example, in a state where the inner
periphery thereof is substantially coaxial with the opening 211 of the bottom 212. The yoke 222
is formed of, for example, the same material as the plate 221. The yoke 222 is formed in a
substantially convex shape having a projecting portion 222B substantially cylindrically on one
surface side substantially at the center of a plate portion 222A on a substantially disc. The yoke
222 is integrally attached to the plate 221 with the adhesive, for example, via the magnet 300 in
a state where the plate portion 222A and the plate 221 hold the magnet 300. In the state in
which the yoke 222 is attached, the outer peripheral surface of the protrusion 222B faces the
inner peripheral surface of the plate 221 with a predetermined gap to form a magnetic gap.
[0016]
The magnet 300 is formed, for example, in a ring shape, and pole faces are formed on both end
faces in the axial direction. Then, as described above, the magnet 300 is attached by, for example,
an adhesive in a state of being held between the plate 221 and the plate portion 222A of the
yoke 222. In this attached state, the protrusion 222B of the yoke 222 penetrates on the inner
peripheral side of the magnet 300 substantially coaxially. By mounting the magnet 300, the
outer peripheral surface of the protrusion 222B of the yoke 222 and the inner peripheral surface
of the plate 221 face each other with different magnetic poles, and the magnet 300 and the
magnetic circuit unit 220 form a magnetic circuit.
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[0017]
The diaphragm 400 is made of, for example, pulp, resin fibers such as polypropylene or
polyethylene or polyethylene terephthalate, as main components, and is made of paper making
processing which is paper forming, injection molding of synthetic resin, or metal thin plate. The
diaphragm 400 has a vibrating portion 410 as a speaker diaphragm and an edge portion 420 as
a speaker edge.
[0018]
The vibrating portion 410 is formed in a substantially thin film shape of a substantially truncated
shape (cone shape) having a substantially circular through hole 411 which is expanded toward
the one surface side and has a substantially circular through hole 411 at a substantially central
portion. In the vibrating portion 410, a substantially cylindrical attachment portion 412 is
provided in series on the periphery of the through hole 411.
[0019]
The edge portion 420 is formed in a substantially annular shape by the base member 421
formed in a substantially thin film shape. And the edge part 420 has the junction part 422
formed in the substantially thin film shape of the substantially truncated shape which inclines
similarly to the vibration part 410. As shown in FIG. On the outer peripheral edge of the joint
portion 422, an edge 423 curved in a dome shape is continuously provided on the side where the
joint portion 422 is expanded. Furthermore, at the outer peripheral edge of the edge 423, a
mounting flange portion 424 is provided in a row in a hook shape. And the edge part 420 is
formed in a substantially annular shape which has the junction part 422, the edge 423, and the
attachment collar part 424 in series. The edge portion 420 is, for example, impregnated with a
thermosetting resin or the like and subjected to heat press molding, or the material constituting
the substrate 421 is thermally cured by a heat press to be formed into a predetermined shape,
Any method can be applied, such as heat softening the members constituting the material 421 to
form them into a predetermined shape while cooling and forming them.
[0020]
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Here, as shown in FIGS. 3 and 4, for example, as shown in FIGS. 3 and 4, the base material 421
constituting the edge portion 420 is a weft group 421A and a front oblique thread group 421B
as linear members whose axial directions extend in four different directions. It is configured as a
so-called four-axis woven fabric which is woven by the back diagonal yarn group 421C and the
warp yarn group 421D. The substrate 421 is in a state in which four different directions are
approximately 45 °. The weft yarn group 421A, front oblique yarn group 421B, back oblique
yarn group 421C, and warp yarn group 421D are, for example, natural fibers such as cotton and
hemp, synthetic fibers such as cotton and aramid fiber blends, cotton and polyester blends, and
aramid fibers. And carbon fiber, liquid crystal fiber, PBO (polyparaphenylene-benzobisoxazole)
fiber, glass fiber and the like. In addition, not only these members but any linear member can be
applied. Further, the members of the weft group 421A, the front oblique yarn group 421B, the
back oblique yarn group 421C, and the warp yarn group 421D may be the same or different. For
example, the configuration is not limited to a configuration in which the linear member is woven
with four linear members, such as a configuration in which the axial direction is woven along
four different directions with one linear member. Any configuration placed in state is applicable.
[0021]
The weft group 421A is disposed, for example, at substantially the center in the thickness
direction of the base material 421, as shown in FIG. The weft yarn group 421A includes a
plurality of first weft yarns 421A1 and a plurality of second weft yarns 421A2. Although two
types of first weft yarns 421A1 and second weft yarns 421A2 will be described for convenience
of explanation, the same member may be used, and a third weft may be used to form weft yarn
groups 421A with three or more types. You may Here, the thickness of the yarns used for the
first weft yarn 421A1 and the second weft yarn 421A2 is preferably 33 dtex or more and 5010
dtex or less. The first weft yarn 421A1 and the second weft yarn 421A2 correspond to the
second linear member of the present invention. The first weft yarns 421A1 and the second weft
yarns 421A2 are alternately arranged at an interval A in a direction along the surface of the edge
portion 420 (hereinafter referred to as a plane direction) as shown in FIG. 3, for example. There
is. Here, the distance A is desirably 1.6 mm or more and 3.5 mm or less.
[0022]
The front diagonal thread group 421B is disposed on the upper side of the weft group 421A. The
front diagonal thread group 421B includes, for example, front diagonal threads 421B1 as a
plurality of first linear members that are formed in a thread shape using the same material as
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that of the first weft threads 421A1. The front oblique yarn group 421B is not limited to only one
of the front oblique yarns 421B1, and may be composed of a plurality of types such as using a
second front oblique yarn. Here, as the thickness of the used yarn of the front diagonal yarn
421B1, it is preferable to set it as 33 dtex or more and 5010 dtex or less, as in the case of the
first weft yarn 421A1 and the second weft yarn 421A2. The front diagonal threads 421B1 are
disposed at an interval B wider than the interval A in the surface direction of the edge portion
420 so that the angle formed with the first weft yarn 421A1 is about 45 °. Here, the distance B
is preferably 1.3 mm or more and 2.48 mm or less narrower than the distance A.
[0023]
The back diagonal yarn group 421C is disposed below the weft group 421A. The back diagonal
thread group 421C includes, for example, a plurality of back diagonal threads 421C1 as a
plurality of third linear members formed in a thread shape using the same material as the first
weft threads 421A1. The back diagonal thread group 421C is not limited to only one type of the
back diagonal thread 421C1, and may be constituted by a plurality of types such as using a
second back diagonal thread. Here, as the thickness of the yarn used for the back diagonal yarn
421C1, as in the case of the weft yarn group 421A and the front diagonal yarn group 421B, it is
preferable to be 33 dtex or more and 5010 dtex or less. The back diagonal threads 421C1 are
disposed in a direction substantially perpendicular to the front diagonal threads 421B1 at an
interval B in the surface direction of the edge portion 420.
[0024]
The warp group 421D is provided with a plurality of first warps 421D1 and a plurality of second
warps 421D2, each of which is formed in a thread form of the same material as, for example, the
first weft 421A1. In addition, although it demonstrates by two types of 1st warp 421D1 and 2nd
warp 421D2 for convenience of explanation, the same member may be sufficient, and also using
3rd weft, the warp group 421D is comprised by 3 or more types. You may Here, as the thickness
of the yarn used for the first warp yarn 421D1 and the second warp yarn 421D2, it is preferable
to set 33 dtex or more to 5010 dtex similarly to the weft yarn group 421A, the front diagonal
yarn group 421B, and the back diagonal yarn group 421C. The first warp yarns 421D1 and the
second warp yarns 421D2 correspond to the fourth linear member of the present invention. The
first warp yarns 421D1 and the second warp yarns 421D2 are disposed alternately at intervals A
in the surface direction of the edge portion 420 and in a state substantially orthogonal to the
first weft yarns 421A1. In addition, the first warp yarn 421D1 is provided to alternately pass
below the first weft yarn 421A1 and above the front diagonal yarn 421B1. The second warp yarn
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421D2 is provided to alternately pass the upper side of the first weft yarn 421A1 and the lower
side of the back diagonal yarn 421C1. That is, the first warp yarns 421D1 and the second warp
yarns 421D2 are provided in a state in which the front and back tissues of the base material 421
have the same weave structure.
[0025]
In FIG. 3, for convenience of explanation, the front diagonal yarn 421B1 is illustrated as being
separated from the first weft yarn 421A1 and the second weft yarn 421A2, but the base material
421 is provided at the edge portion 420. In this case, the base member 421 is provided to the
edge portion 420 in a state in which both ends (not shown) of the first warp yarn 421D1 and the
second warp yarn 421D2 are pulled in the left-right direction. Therefore, in addition to the first
warp yarn 421D1, the front diagonal yarn 421B1 comes in contact with the first weft yarn
421A1, the second weft yarn 421A2, and the back diagonal yarn 421C1. In addition to the
second warp yarn 421D2, the back diagonal yarn 421C1 comes in contact with the first weft
yarn 421A1, the second weft yarn 421A2, and the front diagonal yarn 421B1.
[0026]
The vibrating plate 400 is formed by attaching the bonding portion 422 of the edge portion 420
to the outer surface side of the outer peripheral edge of the vibrating portion 410 by, for
example, bonding. Further, the diaphragm 400 is positioned such that the attachment flange 424
of the edge 420 abuts on the inner circumferential surface of the positioning cylinder 216 of the
frame 210, and the second attachment step 215 of the frame 210 is adhesively bonded, for
example. It is mounted in a state of being held by a ring-shaped mounting member 430 and
supported by the frame 210.
[0027]
Further, a substantially cylindrical coil bobbin 450 is integrally provided on the diaphragm 400.
The coil bobbin 450 is formed of, for example, the same material as that of the diaphragm 400 in
a substantially cylindrical shape. The coil bobbin 450 is formed in a substantially cylindrical
shape whose outer diameter is substantially the same size as the inner diameter of the
attachment portion 412 of the diaphragm 400, and one end side in the axial direction is
integrally attached using, for example, an adhesive. The coil bobbin 450 may have a
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configuration in which a spherical dome-shaped dust cap for closing the end face is bonded
integrally with, for example, an adhesive at one end side of the side where the diaphragm 400 is
expanded.
[0028]
Further, the coil bobbin 450 is integrally provided with a substantially disc-shaped mounting
support portion 460 which is a so-called damper. The mounting support portion 460 is formed,
for example, of the same material as the coil bobbin in a substantially disc shape. The mounting
support portion 460 has a substantially cylindrical shape in which the coil bobbin 450 is inserted
at substantially the center, and has a cylindrical portion (not shown) whose inner peripheral
surface is integrally attached to the outer peripheral surface of the coil bobbin 450 by, for
example, an adhesive. ing. Furthermore, the mounting support portion 460 is provided with a
series of movable portions 461 that are formed in the shape of a flange in the radial direction at
one end in the axial direction of the cylindrical portion and in the shape of a wave in the radial
direction. Further, on the outer peripheral edge of the movable portion 461, a collar portion 462
which protrudes like a collar and is attached to the first attachment surface 213A of the first
attachment stepped portion 213 of the frame 210 by, for example, an adhesive is provided in
series. . Then, the flange 462 of the mounting support 460 is attached to the first attachment
surface 213A of the frame 210, and the attachment flange 424 of the edge 420 of the diaphragm
400 is attached to the second attachment step 215 of the frame 210, A diaphragm 400 to which
the coil bobbin 450 is integrally attached is disposed on the frame 210.
[0029]
The voice coil 500 is wound around the outer peripheral surface of the other end side of the coil
bobbin 450 in the axial direction. The wound state of the voice coil 500 is fixed by, for example,
an adhesive. The voice coil 500 is wound, for example, in a state in which the diaphragm 400 is
attached to the frame 210 and positioned in the opposing magnetic gap between the yoke 222
and the plate 221 of the magnetic circuit unit 220. Then, both ends of the wire of the voice coil
500 are drawn out and connected to the terminal 217A of the terminal 217 provided on the
frame 210 to become an input end of audio data.
[0030]
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The protective member is formed, for example, in a mesh shape of, for example, a synthetic resin
or a metal material, and is attached to the positioning cylindrical portion 216 of the frame 210 in
a state of covering the expanding side of the diaphragm 400. The attachment of the protective
member may be, for example, an adhesive or the like, or may be attached by any method such as
fitting fixation or screwing. Further, the speaker device 100 may be configured without the
protective member.
[0031]
[Manufacturing Operation of Speaker Device] Next, a manufacturing operation of the speaker
device 100 will be described.
[0032]
For example, using a mold (not shown) formed into a predetermined shape, the base member
421 previously cut and formed into an annular shape of a predetermined dimension is heatpressed to connect the joining portion 422, the edge 423 and the attachment collar portion 424
in series. The edge portion 420 is formed into a substantially annular shape.
Then, the inner peripheral surface of the bonding portion 422 of the edge portion 420 is bonded,
for example, with an adhesive to the outer peripheral edge of the vibration portion 410 formed in
advance and integrally attached, thereby forming the diaphragm 400. The outer peripheral edge
of the vibrating portion 410 may be laminated at the time of heat press molding of the edge
portion 420, and the vibrating portion 410 may be integrally attached by thermocompression
bonding while molding the edge portion 420.
[0033]
Then, in the speaker device 100 to which the diaphragm 400 is attached, when sound data of an
electrical signal is input to the terminal 217A, a predetermined current flows in the voice coil
500, and the diaphragm 400 vibrates together with the coil bobbin 450. This vibration is
elastically deformed to a state in which the bending rate of the edge 423 of the edge portion 420
changes, and the diaphragm 400 vibrates in a state in which the coil bobbin 450 moves along
the axial direction. Then, since the edge 420 has substantially the same tensile strength in the
longitudinal direction, the lateral direction, and the oblique direction in plan view, the edge 420
elastically deforms in a substantially uniform state in the circumferential direction, and the coil
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bobbin A state where movement along the axial direction is obtained without so-called rolling in
which the 450 moves at an angle with respect to the axial direction is obtained, good sound
characteristics are obtained, and stress is concentrated partially and breakage occurs It is also
possible to prevent problems such as
[0034]
[Operation and Effect of Speaker Device] As described above, in the above embodiment, as the
edge portion 420 attached to the outer peripheral edge which is the end portion of the vibrating
portion 410, the axial direction is substantially parallel to the plane and different in four
directions. It is formed of a base member 421 having a linear member along, ie, a weft group
421A, a front oblique yarn group 421B, a back oblique yarn group 421C, and a warp group
421D. For this reason, the tensile strengths in four directions in the longitudinal direction, the
lateral direction, and the oblique direction in plan view become almost equal, uniforming of
strength balance is obtained, and good vibration along the axial direction without causing socalled rolling Vibration of the plate 400 can be obtained, and good sound characteristics can be
obtained.
[0035]
Then, a base material 421 is formed by the four weft groups 421A, the front oblique yarn group
421B, the back oblique yarn group 421C, and the warp yarn group 421D. For this reason, it is
possible to easily form, for example, the base material 421 having substantially the same tensile
strength in four directions. Further, by forming each weft group 421A, front oblique yarn group
421B, back oblique yarn group 421C, and warp yarn group 421D with the same material, a more
uniform strength balance can be easily obtained. Furthermore, the base material 421 is
configured as a woven fabric in which the respective weft yarn groups 421A, front oblique yarn
groups 421B, back oblique yarn groups 421C, and warp yarn groups 421D are woven. For this
reason, each weft yarn group 421A, front oblique yarn group 421B, back oblique yarn group
421C, and warp yarn group 421D interfere with the other linear members, respectively, to the
non-woven fabric in which the unnecessary vibration of each linear member is not woven. As
compared with the conventional three-axis woven fabric, the contact points at which the linear
members contact each other can be increased, unnecessary vibration of each linear member can
be suppressed, and better vibration of the diaphragm 400 can be obtained. .
[0036]
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Further, the front diagonal yarn 421B1 is at about 45 ° to the first warp yarn 421D1, the first
weft yarn 421A1 is at about 90 ° to the first warp yarn 421D1, and the back diagonal yarn
421C1 is It arrange | positions in the state which makes about 135 degrees with respect to 1st
warp 421D1, respectively. For this reason, it is possible to set the direction in which the tensile
strength is substantially the same every about 45 °, that is, the substantially the same angle.
Therefore, in a configuration in which the tensile strength is not substantially the same in the
same direction, for example, the surface diagonal yarn 421B1 is about 30 ° to the first warp
yarn 421D1 and the first weft yarn 421A1 is to the first warp yarn 421D1. The difference in the
deformation state of the edge portion 420 can be reduced as compared with a configuration in
which the back diagonal yarn 421C1 is disposed at about 90 ° and about 150 ° with respect to
the first warp yarn 421D1. That is, the tensile strength becomes more uniform in the
circumferential direction. Therefore, better vibration of the diaphragm 400 can be obtained.
[0037]
The base material 421 is configured such that the first and second warps 421D1 and the second
warps 421D2 form the same weave structure on the front and back. Therefore, for example, in
the manufacturing process of the diaphragm 400, the base material 421 can be handled without
regard to the front and back. Therefore, the edge 420 can be easily manufactured.
[0038]
[Modification of the embodiment] The present invention is not limited to the above-described
embodiments, and includes the following modifications as long as the object of the present
invention can be achieved.
[0039]
That is, although the cone type speaker apparatus 100 provided with the cone-shaped diaphragm
400 was demonstrated, the diaphragm of any shapes, such as a horn type, can also be objected,
for example.
[0040]
And although the structure of the diaphragm 400 which attached the edge part 420 to the outer
periphery of the vibration part 410 was demonstrated, in the state which laminates | stacks the
edge part 420 formed with the base material 421 in the edge 423 part of the diaphragm 400.
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Alternatively, the edge 423 of the vibrating plate 400 may be used as the base member 421, and
the vibrating portion 410 may be integrally formed as a member of the triaxial fabric.
[0041]
Further, as the base material 421, weft yarn groups 421A, front oblique yarn groups 421B, back
oblique yarn groups 421C, and warp yarn groups 421D may be arranged such that the directions
in which the tensile strengths become substantially the same do not become substantially the
same angle.
For example, the front diagonal yarn 421B1 is about 30 ° to the first warp yarn 421D1, the first
weft yarn 421A1 is about 90 ° to the first warp yarn 421D1, and the back diagonal yarn 421C1
is to the first warp yarn 421D1. It is also possible to arrange them in a state of about 150 °.
Even with such a configuration, uniform tensile strength in the circumferential direction can be
obtained and good vibration of the diaphragm 400 can be obtained, as compared with the
configuration using a conventional triaxial woven fabric.
[0042]
Furthermore, the base material 421 may be configured as a so-called four-axis braided fabric in
which weft yarn groups 421A, front oblique yarn groups 421B, back oblique yarn groups 421C,
and warp yarn groups 421D are sequentially arranged in layers instead of being configured as a
four-axis fabric .
With such a configuration, it is not necessary to carry out the process of weaving the substrate
421, and the substrate can be easily manufactured. Further, in such a configuration, if weft yarn
group 421A, front diagonal yarn group 421B, back diagonal yarn group 421C, and warp yarn
group 421D are adhered and fixed by an adhesive or the like, and each other is
thermocompression-bonded, each linear member But the substrate can be handled easily.
[0043]
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Then, for example, the configuration in which the first warp yarns 421D1 and the second warp
yarns 421D2 are provided in a state in which only the first weft yarns 421A1 are entangled has
been illustrated. It is good also as a structure provided in the state which becomes the same
weave structure. Specifically, the first warp yarn 421D1 is alternately passed below the first weft
yarn 421A1, above the front diagonal yarn 421B1, below the second weft yarn 421A2, and
above the front diagonal yarn 421B1. The second warp yarns 421D2 may be alternately woven
so as to alternately pass the upper side of the first weft yarn 421A1, the lower side of the back
diagonal yarn 421C1, the upper side of the second weft yarn 421A2, and the lower side of the
back diagonal yarn 421C1. . Even with such a configuration, it is possible to provide the same
effect as that of the above embodiment, that is, good vibration of the diaphragm 400.
[0044]
Further, instead of the base material 421, for example, a base material 700 in which the front
and back tissues have the same weave structure as shown in FIG. 5 may be used. In the base
material 700, the first warp yarns 421D1 are provided so as to alternately pass below the first
weft yarns 421A1 and the second weft yarns 421A2 and above the front diagonal yarn 421B1.
Further, the second warp yarn 421D2 is formed in a state of alternately passing through the
upper side of the second weft yarn 421A2 and the first weft yarn 421A1, and the lower side of
the back diagonal yarn 421C1. Even with such a configuration, it is possible to provide the same
effect as that of the above embodiment, that is, good vibration of the diaphragm 400.
[0045]
Furthermore, instead of the base material 421, for example, a base material 710 in which the
front and back tissues have the same weave structure as shown in FIG. 6 may be used. The base
710 includes a weft yarn group 421A, a front oblique yarn group 421B, a back oblique yarn
group 421C, and a warp yarn group 711 as a fourth linear member. The first weft yarn 421A1 is
disposed on the upper side in the thickness direction of the base 710. The second weft yarn
421A2 is disposed below the base 710 in the thickness direction. The front diagonal yarn 421B1
is disposed below the first weft yarn 421A1. The back diagonal yarn 421C1 is disposed above
the second weft yarn 421A2 and below the front diagonal yarn 421B1. The warp group 711
includes warps 711A as a plurality of fourth linear members disposed in a state of being
substantially orthogonal to the first weft yarn 421A1 and the second weft yarn 421A2 at
predetermined intervals. The warp yarn 711A is provided to alternately pass the upper side of
the first weft yarn 421A1 and the front diagonal yarn 421B1, and the lower side of the second
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weft yarn 421A2 and the back diagonal yarn 421C1. Even with such a configuration, it is
possible to provide the same effect as that of the above embodiment, that is, good vibration of
the diaphragm 400.
[0046]
Also, instead of the base material 421, for example, a base material 720 in which the front and
back tissues have the same weave structure as shown in FIGS. 7 and 8 may be used. Here, FIG. 8
is a cross-sectional view of the woven structure of the substrate taken along line VIII-VIII in FIG.
The base material 720 is configured as a so-called four-axis woven fabric which is woven with a
weft group 421A, a front oblique yarn group 722, a back oblique yarn group 723 and a warp
group 421D.
[0047]
That is, as shown in FIG. 8, the front diagonal thread group 722 is disposed on the upper side of
the weft group 421A. The front diagonal thread group 722 includes a plurality of first front
diagonal threads 722A and a plurality of second front diagonal threads 722B. The front oblique
yarn group 722 is also described as two types of the first front oblique yarn 722A and the
second front oblique yarn 722B for convenience of explanation, but the same member may be
used, and the third weft may be used. The front diagonal thread group 722 may be configured by
three or more types, such as using. Here, the first front diagonal threads 722A and the second
front diagonal threads 722B correspond to the first linear member of the present invention. As
shown in FIG. 7, the first front diagonal yarn 722A is disposed in a state where the angle formed
with the first weft yarn 421A1 is about 45 °. The second front diagonal thread 722B is disposed
below the first front diagonal thread 722A and in a state substantially orthogonal to the first
front diagonal thread 722A. The back diagonal thread group 723 is disposed below the weft
group 421A. The back diagonal thread group 723 includes a plurality of first back diagonal
threads 723A and a plurality of second back diagonal threads 723B. The back diagonal thread
group 723 is also described with two types of the first back diagonal thread 723A and the
second back diagonal thread 723B for convenience of explanation, but the same member may be
used, or the third weft may be used, etc. The back diagonal thread group 723 may be composed
of three or more types. Here, the first back diagonal threads 723A and the second back diagonal
threads 723B correspond to the third linear member of the present invention. The first back
diagonal thread 723A is disposed substantially parallel to the first front diagonal thread 722A.
The second back diagonal thread 723B is disposed below the first back diagonal thread 723A
and substantially parallel to the second front diagonal thread 722B. The first warp yarn 421D1 is
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provided so as to alternately pass below the first weft yarn 421A1 and above the first front
diagonal yarn 722A and the second front diagonal yarn 722B. The second warp yarn 421D2 is
woven in a state of alternately passing the upper side of the first weft yarn 421A1, and the lower
side of the first back diagonal yarn 723A and the second back diagonal yarn 723B. Even with
such a configuration, it is possible to provide the same effect as that of the above embodiment,
that is, good vibration of the diaphragm 400.
[0048]
Further, instead of the base material 421, for example, as shown in FIG. 9, a base material 730 in
which the front and back tissues are different in weave structure may be used. The base material
730 includes a weft group 421A, a front oblique thread group 421B, a back oblique thread group
421C, and a warp group 731. The first weft yarn 421A1 and the second weft yarn 421A2 are
disposed below the base 730 in the thickness direction. The front diagonal yarn 421B1 is
disposed on the upper side of the first weft yarn 421A1. The back diagonal yarn 421C1 is
disposed between the first weft yarn 421A1 and the front diagonal yarn 421B1. The warp group
731 includes warps 731A as a plurality of fourth linear members disposed in a state of being
substantially orthogonal to the first weft yarn 421A1 at predetermined intervals. The warp yarn
731A is alternately below the first weft yarn 421A1 and the back diagonal yarn 421C1, above
the front diagonal yarn 421B1, below the second weft yarn 421A2 and back diagonal yarn
421C1, and above the front diagonal yarn 421B1. It is woven into the passing condition. Even
with such a configuration, it is possible to provide the same effect as that of the above
embodiment, that is, good vibration of the diaphragm 400.
[0049]
The present embodiment can also be applied to a configuration in which the voice coil 500 is
directly wound around a portion formed in a substantially cylindrical shape by being bent in
series from the vibrating portion 410 without having the coil bobbin 450, for example. Moreover,
although the vibration part 410 was formed in substantially circular truncated shape, for
example, what was formed in substantially elliptical truncated shape is applicable.
[0050]
Furthermore, the configuration of the main body 200 is not limited to the above-described
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structure in which the frame 210 and the magnetic circuit unit 220 described above are
provided and spread over one surface. For example, any shape may be used, such as a
substantially cylindrical shape used in the case of a small size used for a portable device such as
a mobile phone or a notebook computer. Furthermore, as the magnetic circuit unit 220, any
shape that constitutes any magnetic circuit, such as an internal magnet type or an external
magnet type, can be applied.
[0051]
Moreover, although the protective member was provided and demonstrated, it is not necessary to
provide a protective member as mentioned above.
[0052]
In addition, the specific structure and procedure at the time of implementation of this invention
can be suitably changed into another structure etc. in the range which can achieve the objective
of this invention.
[0053]
[Operation and Effect of the Embodiment] As described above, as the edge portion 420 provided
on the outer peripheral edge which is the end portion of the vibrating portion 410, a linear
member substantially parallel to the plane and having an axial direction in four different
directions. That is, it is formed by the base material 421 having the weft group 421A, the front
oblique yarn group 421B, the back oblique yarn group 421C, and the warp yarn group 421D.
For this reason, the tensile strengths in four directions in the longitudinal direction, the lateral
direction, and the oblique direction in plan view become almost equal, uniforming of strength
balance is obtained, and good vibration along the axial direction without causing so-called rolling
Vibration of the plate 400 can be obtained, and good sound characteristics can be obtained.
[0054]
FIG. 1 is a cross-sectional view showing a speaker device according to an embodiment of the
present invention.
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It is a top view which shows the edge part of the diaphragm in the said one Embodiment. It is a
top view which shows the weave structure of the base material in the said one Embodiment. It is
sectional drawing of the weave structure of the base material along the IV-IV line in FIG. 3 in the
said one Embodiment. It is sectional drawing of the weave structure of the base material in other
embodiment of this invention. It is sectional drawing of the woven structure of the base material
in further another embodiment of this invention. It is a top view which shows the weave
structure of the base material in further another embodiment of this invention. It is sectional
drawing of the weave structure of the base material along the VIII-VIII line in FIG. 7 in the said
further another embodiment. It is sectional drawing of the woven structure of the base material
in further another embodiment of this invention.
Explanation of sign
[0055]
DESCRIPTION OF SYMBOLS 100 ... Speaker apparatus 210 ... Frame 222 ... Yoke 300 ... Magnet
400 as a magnetic body ... Diaphragm 410 ... Vibration part as a diaphragm part for speakers
420 ... Edge part which is an edge for speakers 421 ... Base material 421 A1 ... Linear member 1st
weft as a second linear member 421A2 ... second weft as a second linear member which is a
linear member 421 B1 ... front oblique as a first linear member which is a linear member Yarn
421C1 ... back diagonal thread as a third linear member which is a linear member 421 D1 ... first
warp as a fourth linear member which is a linear member 421 D2 ... fourth linear member which
is a linear member Second warp 500 as a member ... voice coil 711A, 731A ... warp as a fourth
linear member 722A ... first linear member as a first linear member Front diagonal yarn 722 B:
second front diagonal yarn as a first linear member which is a linear member 723 A: first back
diagonal yarn as a third linear member which is a linear member 723 B: linear member Back
diagonal thread as a third linear member
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