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JP2005026817

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DESCRIPTION JP2005026817
An object of the present invention is to solve the problems that the sound quality of reproduced
sound is reduced, the generation of a rattling noise, and sounds outside the car (such as road
noise) adversely affect the in-vehicle sound field. A speaker unit 30 is mounted in a speaker unit
mounting hole 22 of a baffle plate 21 provided with a speaker unit mounting hole 22, and a
service hole 13a is provided in a door panel (inner panel) 12 of a door device 10 for a vehicle. ,
13b, 13c, 13d. [Selected figure] Figure 3
In-vehicle speaker device and door panel
TECHNICAL FIELD [0001] The present invention relates to an on-vehicle speaker device and a
door device. 2. Description of the Related Art A door apparatus for a vehicle usually has a double
structure having an internal space to accommodate a window glass, and a door panel (inner
panel) to which a mechanism for raising and lowering the window glass is attached is used. It is
equipped inside. The door panel is provided with a hole called a service hole in order to reduce
the weight of the door apparatus according to the demand for weight reduction of the vehicle, or
for inserting a regulator or passing a wire in the door panel. Further, since a vehicle-mounted
speaker device (such as a front speaker) is usually attached to the door of the front seat, it is
attached to the above-mentioned service hole or a dedicated speaker unit attachment hole.
Hereinafter, an example of attachment of the on-vehicle speaker device to a conventional door
panel will be described with reference to the drawings. As shown in FIG. 1, the in-vehicle speaker
device 100 fixes a speaker bracket 102 inside a vehicle around a service hole 110 provided in a
door panel (inner panel) 101. The mounting flange 105 of the speaker unit 104 is fixed with the
service hole cover 111 interposed on the speaker mounting surface 103 of the speaker bracket
102. Regardless of the surface shape of the door panel (inner panel) 101, the flat surfaces of the
speaker mounting surface 103 and the mounting flange 105 are secured, and the bonding
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surface with the service hole cover 111 is in close contact at the time of mounting to enhance
sealing performance For example, refer to Patent Document 1). [Patent Document 1] JP-A-5116570 (pages 2, 3 and 2) [0005] As described above, the door panel (inner panel) 101 is used.
For various purposes, a plurality of service holes 110a, 110b, 110c and mounting holes 110d for
a speaker unit are provided, as shown for example in FIG. Therefore, the rigidity is reduced, and
the door panel 101 is easily vibrated by the vibration generated from the speaker unit 104. As a
result, problems occur in that the sound quality of the speaker reproduction sound is degraded,
or a rattling noise is generated. In addition, it has a structure that sounds (road noise etc.) from
outside the vehicle can easily enter from the service holes 110a, 110b, 110c and the mounting
holes 110d for the speaker unit, which adversely affects the in-vehicle sound field. is there.
The problem to be solved by the present invention is that the sound quality of the reproduced
sound and the generation of the rattling noise mentioned above and the sound outside the car
(road noise etc.) adversely affect the sound field inside the car. The solution of the point is given
as an example. The invention described in claim 1 is an on-vehicle speaker device for mounting a
speaker unit on a door panel of a vehicle, wherein a baffle plate for mounting in a hole formed on
the door panel is used. A speaker unit mounting hole for mounting the speaker unit is formed in
the baffle plate, and the speaker unit is mounted in the speaker unit mounting hole. The
invention described in claim 5 is a door device for a vehicle having a plurality of holes in a door
panel, wherein a baffle plate is provided with a speaker unit mounting hole for mounting a
speaker unit. Is fitted in at least one of the plurality of holes. BEST MODE FOR CARRYING OUT
THE INVENTION Embodiments of the in-vehicle speaker device and the door device of the
present invention will be described in detail with reference to FIGS. 3 to 5. FIG. 3 is a perspective
view showing a door apparatus according to the embodiment of the present invention. FIG. 4 is a
plan view of the on-vehicle speaker device according to the present invention. FIG. 5 (A) is a
cross-sectional view taken along the line V-V in FIG. 4, and (B) and (C) are cross-sectional views
of the baffle plate. The door device 10 is for a vehicle, and as shown in FIG. 3, in the door panel
(inner panel) 12 on the inner side, service holes 13a, 13b, which are a plurality of (here, four, for
example) holes. 13c and 13d are provided. Further, as shown in FIG. 4, the size and shape of the
vehicle-mounted speaker device 20 completely cover the service hole 13 b at the position where
the speaker unit 30 is attached (see FIG. 3). In this case, a baffle plate 21 having a rectangular
shape, for example, is attached so as to be substantially flush with the door panel 12. The baffle
plate 21 is provided with a speaker unit mounting hole 22 (see FIG. 3) for mounting the speaker
unit 30, and the speaker unit 30 is fitted into the speaker unit mounting hole 22. In the example
shown in FIG. 4, it is fixed by three screws 23) or the like. The baffle plate 21 uses a plate
material of a material that absorbs or attenuates unnecessary vibration of the door panel 12.
That is, as the material, aluminum die casting having a large internal loss, magnesium alloy die
casting, silicone resin (general name of polymer of organic silicon compound) which absorbs
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vibration, resin having a loss coefficient tan δ of 0.03 or more, etc. Can be illustrated. Further, as
shown in FIG. 5A, the baffle plate 21 may have a structure in which vibrations generated from
the speaker unit 30 are not transmitted to the door panel 12 (multilayer structure). That is, as
shown in FIG. 5B, one or more of the damping material 21b is attached to the above-described
plate material 21a (made of a material that absorbs or attenuates unnecessary vibration of the
door panel 12), or As shown to (C), what clamped the damping material 21b by board material
21a, 21c in the shape of a sandwich etc. can be illustrated. In addition, as the damping material
21b, aluminum die casting having a large internal loss, magnesium alloy die casting, silicone
resin that absorbs vibration (general name of polymers of organic silicon compounds), and loss
coefficient tan δ of 0.03 or more Resin etc. can be illustrated. In order to attach the abovedescribed in-vehicle speaker device 20 to the door device 10, a speaker unit attachment hole 22
for attaching the speaker unit 30 to the baffle plate 21 is provided. Then, the baffle plate 21 is
attached to the service hole 13 b of one of the plurality of service holes 13 a, 13 b, 13 c, 13 d
provided in the door panel 12 so as to be substantially flush with the door panel 12. At this time,
the baffle plate 21 may be directly attached to the door panel 12, but when the service hole 13 b
is larger than the baffle plate 21, it may be suitably attached through an attachment member or
the like. . Then, the speaker unit 30 is fitted into the speaker unit mounting hole 22 provided in
the baffle plate 21, and the speaker unit 30 is fixed to the baffle plate 21 by fastening means
such as screws 23 and rivets. As described above, by mounting the baffle plate 21 so as to be
substantially flush with the door panel 12, the rigidity of the door panel 12 can be improved, and
road noise can be reduced. Furthermore, the baffle plate 21 can be made of a material that
absorbs or attenuates unnecessary vibration of the door panel 12 or can be configured not to or
hardly transmit the vibration generated from the speaker unit 30 to the door panel 12.
As a result, unnecessary vibration transmitted to the door panel 12 can be reduced, so that the
sound quality of the speaker reproduction sound can be improved and the noise can be reduced.
The on-vehicle speaker device and the door device of the present invention are not limited to the
above-described embodiment, and appropriate modifications, improvements, and the like can be
made. For example, in the embodiment described above, the case where the rectangular baffle
plate 21 is attached to the rectangular service hole 13 b has been described, but the shape of the
baffle plate is not particularly limited. Therefore, even if it is not the attachment hole only for a
speaker, it can match with the shape and magnitude | size of the service hole previously provided
in arbitrary shapes, without restricting a use. Also, the shape and size of the speaker mounting
hole can be matched to the diameter and shape (round, oval, etc.) of the speaker unit to be
attached. In addition to the already provided speaker device, a new speaker device can be
attached by attaching a baffle plate to another service hole. Furthermore, it is also possible to
attach a baffle board to a plurality of service holes, respectively. Further, it is also possible to
provide a plurality of speaker attachment holes in one baffle plate, and attach a combination of a
plurality of speaker units such as, for example, a speaker unit for low frequency and a speaker
unit for medium and high frequency sound. In addition, the materials and the like of the plate
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members 21a and 21c, the damping member 21b, and the like described in the above-described
embodiment are arbitrary and not limited as long as the present invention can be achieved. As
described above, the on-vehicle speaker device according to the present embodiment includes
the baffle plate 21 attached to the hole (service hole 13 b) formed in the door panel 12, and the
speaker unit attachment for attaching the speaker unit 30 to the baffle plate 21. A hole 22 is
formed and a speaker unit 30 is attached to the speaker unit attachment hole 22. Further, the
door device 10 is a door device 10 for a vehicle in which a plurality of holes (service holes 13a,
13b, 13c, 13d) are provided in the door panel 12, and a speaker unit mounting hole 22 for
mounting the speaker unit 30. The baffle plate 21 in which is formed is fitted in at least one of
the plurality of holes (service holes 13a, 13b, 13c, 13d). As a result, unnecessary vibration
transmitted to the door panel 12 can be reduced, and the sound quality in the car can be
improved and the noise can be reduced, and at the same time, a sound (such as road noise)
outside the car is less likely to enter. It is possible to prevent adverse effects on the in-vehicle
sound field.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional
in-vehicle speaker device. FIG. 2 is a front view showing a conventional door panel. FIG. 3 is a
front view showing an embodiment of an on-vehicle speaker device and a door device according
to the present invention. FIG. 4 is an enlarged view of an essential part showing an embodiment
of an on-vehicle speaker device according to the present invention. 5A is a cross-sectional view of
the in-vehicle speaker device taken along the line V-V in FIG. 4, and FIGS. 5B and 5C are crosssectional views showing the configuration of a baffle plate. [Description of the code] 10 door
device 12 door panel (inner panel) 13a, 13b, 13c, 13d service hole 20 vehicle speaker device 21
baffle plate 22 speaker unit mounting hole 30 speaker unit
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