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DESCRIPTION JP2005167334

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DESCRIPTION JP2005167334
PROBLEM TO BE SOLVED: To provide a speaker device capable of preventing the generation of
abnormal sound due to the vibration of a wire harness at low cost. SOLUTION: The speaker
device can be, for example, an on-vehicle speaker device, and includes a wiring, a frame, and a
packing attached to the frame. The packing is made of an insulating material such as a resin and
can have a role as a buffer member when the speaker device is mounted on a vehicle. The outer
peripheral wall of the packing is provided with a plurality of projections projecting outward and
supporting the wire harness. That is, the wire harness is drawn around the outer peripheral wall
of the packing in a state of being floated from the outer peripheral wall of the packing by the
plurality of convex portions. Thereby, when a wire harness vibrates, the abnormal noise which
generate | occur | produces by repeating a packing and contact can be prevented. [Selected
figure] Figure 7
Speaker device
[0001]
The present invention relates to a speaker device, and more particularly to a contact structure of
a wire harness connected to a voice coil.
[0002]
Generally, in a speaker device for a vehicle or the like, a wire (hereinafter referred to as a "wire
harness") for supplying an electric signal to the speaker device is routed around the speaker
device (for example, a patent) Reference 1 and 2).
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As a portion to which the wire harness is drawn, there is generally a metal frame, a mounting
bracket for the speaker device, etc. For example, the wire harness is drawn along the outer
periphery of the frame. Since the wire harness is connected to a voice coil that drives the speaker
device, it has to be routed around the speaker device over a certain length.
[0003]
As described above, since the wire harness is positioned in the vicinity of the speaker device, the
wire harness may vibrate due to vibration of the vehicle or the like, and the contact with the
frame or the like may be repeated. As described above, when the wire harness vibrates and
contacts the frame repeatedly, an abnormal sound may be generated in the output sound.
[0004]
In order to prevent the generation of an abnormal sound due to the vibration of the wire harness
as described above, a method may be used in which a cushion or non-woven fabric is attached to
a place where the wire harness can come in contact. However, there is a problem that such a
countermeasure is expensive.
[0005]
JP-A-11-321483 JP-A-7-222282
[0006]
The problems to be solved by the present invention include those as described above.
An object of the present invention is to provide a speaker device capable of preventing the
generation of an abnormal sound due to the vibration of a wire harness at low cost.
[0007]
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The invention according to claim 1 is a speaker device, comprising: a wire for supplying an
electric signal; a frame; and a packing made of an insulator attached to the frame, and the outer
peripheral wall of the packing has a plurality of projections. A portion is provided, and the wiring
is fixed to the packing in a state of being supported by the plurality of convex portions.
[0008]
In a preferred embodiment of the present invention, the speaker device includes a wire for
supplying an electric signal, a frame, and a packing made of an insulator attached to the frame,
and the outer peripheral wall of the packing has a plurality of convexes. A portion is provided,
and the wiring is fixed to the packing in a state of being supported by the plurality of convex
portions.
[0009]
The above speaker device can be, for example, a speaker device for vehicle use, and includes a
wiring, a frame, and a packing attached to the frame.
The packing is made of an insulating material and can have a role as a buffer member when the
speaker device is mounted on a vehicle, for example.
A plurality of convex portions are provided on the outer peripheral wall of the packing, and the
wiring is fixed to the periphery of the packing in a state of being supported by the plurality of
convex portions. Therefore, since the wiring is fixed to the packing in a state of being floated
from the outer peripheral wall of the packing by the convex portion, even if the wiring vibrates
due to the vibration of the vehicle, the abnormality occurs due to the wiring repeatedly
contacting the outer peripheral wall of the packing Sound can be reduced.
[0010]
In a preferred embodiment, the projection is semi-cylindrical and is provided perpendicularly to
the longitudinal direction of the wiring. As a result, the contact area between the convex portion
and the wiring becomes smaller, and the vibration of the wiring becomes more difficult to be
transmitted to the packing.
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[0011]
In one aspect of the above speaker device, the packing is made of a resin material, and the
convex portion is integrally molded with the packing. By integrally molding the convex portion
with the packing of the resin material, the number and position of the convex portion on the
outer peripheral wall of the packing can be changed relatively easily, and the design freedom is
improved with respect to the routing position of the wiring. .
[0012]
In another aspect of the above speaker device, the frame is made of a resin material and a
plurality of convex portions are formed, and the wiring is fixed to the frame in a state of being
supported by the plurality of convex portions. It is done. In the case where the frame is formed
by casting of resin material or aluminum (aluminum die casting), similar convexes are formed on
the frame to reduce abnormal noise caused by contact between the vibrating wiring and the
frame. be able to. Further, in the case where the frame is formed by processing (for example,
press processing) of a plate-like metal material such as iron or aluminum, the same effect can be
obtained by forming a bead-like convex part.
[0013]
Hereinafter, preferred embodiments of the present invention will be described with reference to
the drawings.
[0014]
[Configuration of Speaker Device] FIGS. 1 and 2 schematically show the schematic configuration
of a speaker device 100 according to an embodiment of the present invention.
In addition, the speaker apparatus 100 of a present Example can be used suitably as a vehiclemounted speaker. FIG. 1A shows a plan view of the speaker device 100. FIG. FIG.1 (b) has shown
sectional drawing along cutting-plane line A-A 'of the speaker apparatus 1 in Fig.1 (a). FIG. 2A
shows a rear view of the speaker device 100. FIG. FIG.2 (b) has shown the side view from the
arrow B direction of the speaker apparatus 100 in Fig.1 (a). Hereinafter, with reference to FIG. 1
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and FIG. 2, the structure etc. of the speaker apparatus 100 of a present Example are
demonstrated.
[0015]
The speaker device 100 mainly includes a vibration system 10 having a frame 8, a diaphragm 1,
a damper 2, a voice coil bobbin 3 and a voice coil 4, a pot type yoke 5, a magnet 6, and the like
as shown in FIG. A magnetic circuit system 11 having a plate 7 and other various members are
provided. The speaker device 100 is a speaker device of a type generally called double voice or
dual voice, and can emit sound with a large volume of output.
[0016]
First, each component of the vibration system 10 will be described.
[0017]
The diaphragm 1 is a so-called cone-shaped diaphragm, and is bonded and joined to a separate
edge portion 1a, or is integrally formed with the edge portion 1a.
Various materials such as paper-based, polymer-based, and metal-based can be applied to the
diaphragm 1 in accordance with various applications. The outer peripheral edge portion of the
diaphragm 1, that is, the lower end portion of the edge portion 1 a is fixed to the upper surface
of the outer peripheral edge portion of the frame 8. Since various components of the speaker
device 100 are fixed to the frame 8 and also serve to support the speaker device 100, it is
preferable to use a strong metal material. On the other hand, the inner peripheral edge portion of
the diaphragm 1 is fixed in the vicinity of the upper end of the outer peripheral wall of the voice
coil bobbin 3.
[0018]
The damper 2 is made of, for example, a cloth material in which a plurality of corrugations are
formed. In the speaker device 100 of this example, a plurality of dampers 2 are provided. Thus,
the voice coil bobbin 3 having a large driving force can be movably supported. The inner
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peripheral edge of each damper 2 is fixed to the outer peripheral wall of the voice coil bobbin 3.
On the other hand, the outer peripheral edge of each damper 2 is fixed to the inner surface of the
frame 8.
[0019]
The voice coil bobbin 3 has an opening portion on the lower surface, and has a substantially
cylindrical shape. The voice coil 4 is wound around the outer wall of the lower end portion of the
voice coil bobbin 3. The outer peripheral wall of the lower end portion of the voice coil bobbin 3
is opposed to the inner peripheral wall of the pot type yoke 5 having an opening portion on the
upper surface at a constant distance. On the other hand, the inner peripheral wall of the voice
coil bobbin 3 is opposed to the outer peripheral wall of the annular plate 7 and the outer
peripheral wall of the annular magnet 6 slightly smaller than the annular plate 7 at a constant
interval. . Thus, an air gap (magnetic gap 20) is formed between the outer peripheral wall of the
plate 7 and the inner peripheral wall of the pot type yoke 5.
[0020]
The voice coil 4 is composed of two independent voice coils 4a and 4b (see FIG. 3). Electrical
signals for two sets of one channel are input to the two voice coils from the amplifier side. For
example, when the speaker device 100 is used for L channel, the same L channel audio signal is
input to the two voice coils 4a and 4b. The voice coil 4 has two sets of plus / minus lead
terminals, and each lead terminal is electrically connected to the two sets of tinsel wires 9 at a
predetermined position of the diaphragm 1. The lead terminal on the positive side is an input
terminal for the L channel signal, and the lead terminal on the negative side is an input terminal
for the ground (GND: ground) signal.
[0021]
Next, each component of the magnetic circuit system 11 will be described.
[0022]
The magnetic circuit system 11 is configured as an internal magnet type magnetic circuit system.
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The present magnetic circuit has an annular magnet 6, an annular plate 7 arranged to overlap on
the top of the magnet 6, and a pot type yoke 5 for accommodating them. In the magnetic circuit
system 11, the magnet 6 and the plate 7 constitute a magnetic circuit, and the magnetic flux of
the magnet 6 is concentrated in the magnetic gap 20 formed between the outer peripheral
surface of the plate 7 and the inner peripheral surface of the pot type yoke 5. ing.
[0023]
Next, various components will be described.
[0024]
The various components include members such as the dustproof cap 12, the packing 13, the
buffer member 14, and the wire harness 15.
[0025]
The dustproof cap 12 has a dome shape.
The outer peripheral edge of the dustproof cap 12 is fixed in the vicinity of the inner peripheral
edge of the diaphragm 1.
Therefore, the dustproof cap 12 functions to prevent foreign matter such as dust from entering
the magnetic circuit system 11 or the like.
[0026]
The packing 13 is an annular member having an insulating property. As a material of packing 13,
materials, such as resin, are suitable, for example. The lower surface of the packing 13 is fixed to
the upper surface of the outer peripheral edge of the frame 8.
[0027]
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The shock absorbing member 14 has a function as a shock absorbing material when attaching
the speaker device 100 to a predetermined position of the vehicle, and also has a function of
preventing transmission of external vibration to the main body of the speaker device 100. It is a
member. For this reason, as a material of the buffer member 14, for example, a member such as a
cushioning sponge is suitable. The buffer member 14 has a rod-like shape, and an adhesive is
applied on one side or a double-sided tape is attached. The buffer member 14 is attached to the
upper surface of the packing 13 via the adhesive or the double-sided tape in a state of being
deformed in an annular shape.
[0028]
The wire harness 15 is a four-wire wiring, and outputs an electric signal for one channel output
from the amplifier to the voice coil 4 via each tinsel wire 9. One end of the wire harness 15 is
connected to the connection terminal 16 by the solder 17, and the other end of the wire harness
15 is connected to the connector terminal 18. Thereby, the wire harness 15, the tinsel wire 9,
and the voice coil 4 are electrically connected.
[0029]
Next, with reference to FIG. 3, a method of supplying an electrical signal to the speaker device
100 will be briefly described. Supply of the electrical signal to the speaker device 100 is
performed through the acoustic source 30, the amplifier 31, the amplifier 32, and the like. The
sound source 30 corresponds to a CD (Compact Disc) player, an MD (Mini Disc) player, or the
like. The sound source 30 outputs an audio signal for one L channel (or R channel) to the
amplifiers 31 and 32 (signal S1). For example, assuming that the speaker device 100 is used for
L channel, the amplifier 31 and the amplifier 32 amplify the output L channel audio signal at a
predetermined amplification factor, and via each tinsel wire 9 etc. , And output to each voice coil
4a and 4b. Therefore, the speaker device 100 can emit an output of a large volume.
[0030]
In the speaker device 100 described above, when an electric signal is input to the wire harness
15 from the amplifier side, the electric signal is transmitted to the voice coil 4 through the
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connection terminal 16, the tinsel wire 9, and the lead terminal of the voice coil 4. Supplied. As a
result, a driving force is generated in the voice coil 4 in the magnetic gap 20, and the diaphragm
1 is vibrated in the axial direction of the speaker device 100. Thus, the speaker device 100
generates sound in the direction of the arrow 50 shown in FIGS. 1 (b) and 2 (b).
[0031]
[Mounting Structure of Wire Harness] As described above, the wiring harness may vibrate due to
the vibration of the vehicle and the like, and the contact with the frame or the like may be
repeated to generate an abnormal sound. The speaker device 100 according to the present
invention makes it possible to prevent the generation of such abnormal sound at low cost. Below,
the attachment structure of the wire harness which concerns on this invention is demonstrated
using FIGS. 4-7.
[0032]
In the embodiment of the present invention, in order to reduce an abnormal sound generated by
the wire harness 15 vibrating and coming into contact with the packing 13, the outer peripheral
wall 13b of the packing 13 is provided with a convex portion 13a for supporting the wire
harness 15. ing. FIG. 4 shows a packing 13 according to the present embodiment. FIG. 4 (a)
shows a plan view of the packing 13 (that is, a drawing in which only the packing 13 is extracted
in FIG. 1 (a)), and FIG. 4 (b) is a cutting line X shown in FIG. Figure 8 shows a cross-sectional view
along -X '.
[0033]
As shown in FIG. 4, three convex portions 13a are provided on the outer peripheral wall 13b of
the packing 13a. These convex portions 13 a support the wire harness 15 in a state of being
floated from the outer peripheral wall 13 b of the packing 13. That is, instead of bringing the
wire harness 15 into contact with all the outer peripheral walls 13 b of the packing 13, the wire
harness 13 is supported only by the plurality of convex portions 13 a.
[0034]
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Next, the shape of the convex portion 13a will be described with reference to FIG. FIG. 5 is a
perspective view showing a part D in FIG. 4 (a) in an enlarged manner. As illustrated, the convex
portion 13 a has a substantially semi-cylindrical shape, and protrudes outward from the outer
peripheral surface 13 b of the packing 13. In addition, since wire harness 15 itself also has
circular or elliptical cross-sectional shape, the contact area of the wire harness 15 and the convex
part 13a can be made small.
[0035]
The state which supported the wire harness 15 by FIG. 6 by the convex part 13a is shown. 6 (a)
shows a plan view of the packing 13 and the wire harness 15 at a position corresponding to the
portion D of FIG. 4 (a), and FIG. 6 (b) is a side view seen from the lower direction of FIG. FIG.
[0036]
As shown in FIG. 6, a certain amount of clearance can be secured between the wire harness 15
and the outer peripheral wall 13b of the packing 13 by being supported by the plurality of
convex portions 13a, so the wire harness 15 vibrates. Even if it does, it can prevent that the wire
harness 15 contacts the outer peripheral wall 13b of the packing 13 in locations other than the
convex part 13a. Further, the convex portion 13 a and the wire harness 15 make point contact at
a portion indicated by the arrow 30. As described above, since the wire harness 15 is in point
contact with the convex portion 13 a, the vibration of the wire harness 15 is hardly transmitted
to the packing 13. As mentioned above, even if the wire harness 15 vibrates, generation |
occurrence | production of the abnormal sound from the speaker apparatus 100 can be reduced.
[0037]
Next, a general view of a state in which the wire harness 15 is drawn around the outer periphery
of the packing 13 is shown in FIG. As illustrated, when the wire harness 15 is drawn around the
outer peripheral wall 13 b of the packing 13, the wire harness 15 contacts only the plurality of
projections 13 a and is supported only by the projections 13 a. Thereby, even if any part of the
wire harness 15 vibrates around the outer peripheral wall 13 b of the packing 13, the
transmission of the vibration to the packing 13 can be suppressed.
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[0038]
As described above, in the present embodiment, the wire harness 15 is supported in a state of
being floated from the outer peripheral wall 13 b of the packing 13 (separated by a
predetermined interval) by the plurality of convex portions 13 a provided on the outer peripheral
wall 13 b of the packing 13 Do. Thereby, even when vibration of a vehicle or the like on which
the speaker device is mounted is transmitted to the wire harness 15, the wire harness 15 is
prevented from contacting the outer peripheral wall 13 b of the packing 13 or transmitting
vibration to the packing 13. It is possible to reduce the occurrence of abnormal noise due to the
vibration of the packing 13.
[0039]
Since the packing 13 is manufactured by injection molding of a resin material or the like, the
plurality of convex portions 13 a can be easily formed at low cost by integrally molding the
packing 13. Further, the positions of the plurality of convex portions 13 a can also be changed
relatively easily by changing the mold of the packing 13. Thereby, the design freedom of the
routing of the wire harness 15 can be increased.
[0040]
In addition, the number of the convex parts 13a provided in the outer periphery of the packing
13 is not limited to an above-described thing. When the length of the wire harness 15 at the
outer periphery of the speaker device is long, the number of the convex portions 13a may be
increased. Further, the shape of the convex portion 13a is not limited to the one described above,
for example, a shape such as a convex portion having a substantially conical or trapezoidal cross
section so that the wire harness 15 can be separated from the outer peripheral wall 13a of the
packing 13 and supported. If it is Moreover, it is preferable that the convex part 13a is a shape
which can make the contact area of the convex part 13a and the wire harness 15 small.
[0041]
Furthermore, if the frame 8 is formed of a molded product of resin or aluminum or by aluminum
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die casting, it is preferable to provide the above-mentioned convex portion a also on the outer
peripheral wall of the frame 8. The example which provided the same convex part 8a in the flame
| frame 8 in FIG. 8 is shown. That is, the wire harness 15 is supported by the projections 13 a
provided on the packing 13 and the projections 8 a provided on the frame 8 so that the wire
harness 15 does not contact the packing 13 or the frame 8 when it vibrates. Thereby, since
contact with packing 13 or frame 8 can be controlled in almost all parts of wire harness 15,
generation of abnormal sound can be reduced.
[0042]
The shape and the like of the convex portion 8a in the case where the frame 8 is made of resin,
aluminum or iron will be specifically described. FIG. 9 is a view showing a state in which the
convex portion 8a provided on the frame 8 and the wire harness 15 are in contact with each
other, and is a view cut along a cutting line P-P 'of FIG. FIG. 9 (a) shows a rib 8c as an example of
the convex portion 8a provided on the frame 8. (The convex portion 8a shown in FIG. 9 (a) is
called a "rib" to distinguish it from the bead 8d described later. ). It is preferable to apply such a
rib 8c, when the flame | frame 8 is comprised by the resin material or aluminum die-cast.
[0043]
Further, FIG. 9 (b) shows a bead 8d as another example of the convex portion 8a provided on the
frame 8 (because the convex portion 8a has a bead-like shape, this convex portion 8a is referred
to as "bead". Called It is preferable to apply such a bead 8d, when a flame | frame is comprised by
processing (for example, press processing) of plate-shaped metal materials, such as iron and
aluminum. Moreover, since this bead 8d can be created simultaneously with the drawing process
at the time of producing the frame 8, there is no need to carry out a separate process.
Furthermore, since the beat 8d becomes a smooth surface by the press die, the wire harness 15
in contact does not break.
[0044]
As described above, even if the frame 8 is provided with the convex portion 8a such as the rib 8c
or the bead 8d, the abnormal sound generated by the contact between the vibrating wire frame
15 and the frame 8 can be reduced.
[0045]
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FIG. 1 (a) is a plan view seen from directly above, and FIG. 1 (b) is a cutaway line A- of the
speaker device in FIG. 1 (a). The cross section along A 'is shown.
It is a figure showing composition of a speaker device concerning an example of the present
invention, and Drawing 2 (a) is a back view, and Drawing 2 (b) is a side view from the arrow B
direction of a speaker device in Drawing 1 (a). Indicates It is a figure which shows the supply
method of the electric signal to a speaker apparatus. It is a figure which shows the packing which
concerns on the Example of this invention, FIG. 4 (a) is a top view, FIG.4 (b) shows sectional
drawing which followed the cutting plane line XX 'in FIG. 4 (a). . The perspective view of D part of
FIG. 4 (a) is shown. It is a figure which shows the state which made the convex part of packing
and a wire harness contact, Fig.6 (a) is a top view, FIG.6 (b) shows the side view seen from the
downward direction of Fig.6 (a). . The general view of the state which drew the wire harness
around packing is shown. The general view of the state which drew the wire harness around the
flame | frame is shown. The shape of the convex part provided in a flame | frame is shown.
Explanation of sign
[0046]
Reference Signs List 1 diaphragm 4 voice coil 5 yoke 8 frame 8 a, 13 a convex portion 13
packing 14 shock absorbing material 15 wire harness 100 speaker device
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