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JP2003177762

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DESCRIPTION JP2003177762
[0001]
The present invention provides a sound output member for delivering sound waves to a
passenger compartment and an air duct for air conditioning of the passenger compartment, the
air duct having an inner wall of the air duct facing the passenger compartment, for example It
relates to moving means such as a vehicle.
[0002]
BACKGROUND OF THE INVENTION This type of transport means or vehicle is known, for
example, as a ship, an aircraft, but in particular as a motor vehicle. In this case, a sound output
element is provided which is configured as a loudspeaker and is used as an integral part of an
audio device which transmits the sound to the passenger space or to the passenger compartment.
At that time, the cabin may be substantially sealed to the outside, or may be opened as in, for
example, a cabriolet. Furthermore, in the case of this type of transport, air ducts are usually
provided for air conditioning, ie for ventilation and / or heating and / or cooling of the cabin. In
particular, in the cockpit area of a vehicle, such an air duct is designed to have an inner wall at
least partially facing the passenger compartment.
[0003]
A disadvantage of the known moving means is that the built-in space for the loudspeaker is very
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limited. In particular, in the cockpit area, a large amount of installation space is required, such as
display devices, air conditioner operating devices, storage boxes, air ducts and air duct openings,
so that very little installation space is available for the loudspeaker. Therefore, it is possible to
incorporate only small and unsounding speakers into the cockpit, or no speakers at all. In some
cases, a speaker is incorporated into the door of the vehicle, where it can take advantage of some
of the built-in space. However, the incorporation of the speaker in the door causes other
drawbacks such as acoustic problems, and the need for a special seal against moisture.
[0004]
DE 196 54 416 C1 discloses a blind for a vehicle interior space with a grid-like surface provided
with a penetration in at least one partial region. The blind can then be integrated into the inner
space covering member or the instrument panel, in which case the partial area with the
penetration covers the opening of the air conduit extending into or behind the inner space
covering member or the instrument panel. ing. Furthermore, in this blind, at least one further
partial area of the grid surface is provided with a penetration covering a loudspeaker arranged in
the gap of the inner space covering member or the instrument panel. While this does certainly
save space and combine the various devices, such blinds also do not extend the built-in space
available for the speaker.
[0005]
[Patent Document 1] German Federal Patent Publication No. 196 54 416
[0006]
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a
sound output member of high acoustic quality in a moving means of the type mentioned at the
outset, requiring only very little extra installation space. To configure.
[0007]
According to the invention, this problem is solved by the sound output member having an inner
wall of an air duct and an exciter arranged on the inner wall of the air duct to excite vibrations of
the inner wall of the air duct. .
[0008]
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS By adopting such a configuration,
it is not necessary to incorporate a completely pre-assembled speaker with a membrane and an
exciter into a moving means such as a vehicle.
In this case, the membrane of the speaker can be omitted.
Because the membrane is replaced by the air duct inner wall, the air duct inner wall will perform
a dual function.
The excitation for delivering the sound waves from the inner wall of the air duct is performed by
the exciter. Therefore, not only the installation space is reduced but also the number of parts is
reduced, the cost of installation and logistics can be reduced. Furthermore, the weight of the
transfer means is reduced, and the incorporation of an additional cover grid as required in front
of the speaker to protect the speaker from mechanical damage can be omitted.
[0009]
In this case, for example, for simple assembly, it is conceivable to place the exciter outside the
inner wall of the air duct, that is to say directly in the cabin. On the other hand, according to one
advantageous embodiment of the invention, the exciter is arranged in the air duct, which further
reduces the installation space because the existing space area is exploited, while the exciter is
Since the cover is attached, damage to the exciter due to external action is substantially
eliminated.
[0010]
Bonding the exciter to the inner wall of the air duct advantageously makes installation even
easier.
[0011]
The electromechanical configuration of the exciter is essentially arbitrary, but low cost massproduction parts can easily be used if the exciter has a vibrating coil according to another
advantageous embodiment of the invention.
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[0012]
The acoustic quality of the sound output member is directly influenced by the vibration
characteristics of the inner wall of the air duct.
If the air duct is arbitrarily shaped, it may be advantageous to place a weight member on the
inner wall of the air duct for acoustic adjustment of the sound output member.
The weight member may be glued to the inner wall of the air duct, which may be arranged to
optimize the acoustics according to the type of individual transfer means and / or the specific
shape of the air duct. It is preferred to use high density parts for the weight members. For
example, metals are considered for this purpose.
[0013]
Although the air duct can basically be arranged at any point in the passenger compartment in the
moving means, according to one advantageous embodiment of the invention the air duct can be
arranged in the cockpit member together with the exciter In particular, a particularly large area
of the air duct channel inner wall can be used for sound generation. The cockpit part may, for
example, be an instrument panel, in particular an instrument panel cover.
[0014]
In this case, the air duct is preferably connected to the cockpit in a single piece, so that the
moving means is further simplified if the number of parts is very small.
[0015]
According to yet another advantageous embodiment of the invention, a very effective cabin
sound is achieved.
According to this embodiment, the inner wall of the air duct with the exciter is arranged
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substantially horizontally in the area of the windshield. As a result, the sound waves emitted from
the sound output member can be diverted toward the entire cabin at the windshield. Such an
embodiment is of particular concern when the air ducts are arranged in the instrument panel.
[0016]
If the air duct extends over almost the entire width of the cabin and one exciter is arranged in
each of the right and left regions of the air duct in the direction of travel, a very rich volume and
in particular acoustic You can easily achieve stereo effects.
[0017]
If the air duct is a plastic blow molded member, the manufacture of the air duct, that is, the
production of the moving means such as a vehicle becomes extremely low cost and easy.
The air duct can thus be integrated very easily into other built-in components in the cabin, for
example the cockpit.
[0018]
Next, embodiments of the present invention will be described in detail with reference to the
drawings.
[0019]
DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawings, corresponding parts are
provided with the same reference numerals.
[0020]
FIG. 1 shows a stylized partial view of a motor vehicle 1 with a passenger passenger space or
cabin 2 and a windshield 3.
A cockpit element, for example, is arranged in the cabin 2 and is constituted by an instrument
panel 4 which is only partially shown here.
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The instrument panel 4 has an instrument panel cover 5.
[0021]
The instrument panel cover 5 is an elongated member which extends in a direction generally
transverse to the motor vehicle 1 and covers the air duct 6 which forms a single part with the
cover and the instrument panel 4. The air duct 6 has an air duct inner wall 7 facing the cabin 2
and adjacent thereto, and an air duct outer wall 8 opposite to the cabin 2. A vibration excitation
member or exciter 9 is disposed on the air duct inner wall 7 of the air duct 6 configured as a
plastic blow molding member. The exciter 9 is bonded to the air duct inner wall 7 inside the air
duct 6.
[0022]
The air duct inner wall 7 and the exciter 9 belong to a sound output member 10, which is a
component of an audio device (not shown here) in the motor vehicle 1 and delivers acoustic or
acoustic waves to the cabin 2 Can be used by the vehicle occupant 11 to listen, for example, to a
radio in the vehicle 1. In this case, the vibration of the air duct inner wall 7 generates a sound,
which is caused by the excitation of the air duct inner wall 7 using the exciter 9.
[0023]
Furthermore, the air duct 6 has an opening facing the passenger compartment 2 through which
air can be supplied into the passenger compartment 2 or discharged from the passenger
compartment 2.
[0024]
FIG. 2 shows the cockpit member configured as the instrument panel 4 in the same manner as
FIG. 1 in an enlarged manner, and this is drawn as a perspective view seen substantially in the
vehicle longitudinal axis direction L (see FIG. 1) There is.
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The air duct 6 extends over substantially the entire length of the instrument panel 4 (i.e.,
substantially the entire width of the cabin) and is substantially formed by the outer wall thereof.
The instrument panel cover 5 also belongs to this outer wall. A first exciter 9 is arranged in the
left-hand region 12 of the air duct 6 in the direction of travel F (see FIG. 1) at the inner wall 7 of
the air duct, in which the vibrating coil 19 is shown. Furthermore, a second exciter 14 is disposed
in the right region 6 of the air duct 6 in the traveling direction F. This enables stereo sound
reproduction for the occupants.
[0025]
As shown in FIG. 1, the inner wall 7 of the air duct is disposed substantially horizontally in the
area of the windshield 3 so that the direction of the sound wave transmitted from the sound
output member 10 is changed at the windshield to Can be distributed to
[0026]
FIG. 3 shows an enlarged cross-sectional view of the instrument panel 4 viewed along line III-III
of FIG.
As shown here, the instrument panel cover 5 encloses not only the first air duct 6 but also the
second air duct 15 directed towards the passenger compartment of the motor vehicle not shown
here. In the first air duct 6, an exciter 9 is mounted at the inner surface 16 of the inner wall 7 of
the air duct. Basically, the arrangement of the exciter on the outer surface 17 of the air duct
inner wall 7 is also conceivable. Further shown in FIG. 3 is a weight member 18, which is formed
as a small metal piece and is used for the acoustic adjustment of the sound output member 10
with the exciter 9 and the inner wall 7 of the air duct. The weight member 18 is bonded to the
inner surface 16 of the air duct inner wall 7 in a simple manner.
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