Land vehicles: bodies and tops – Bodies – Vibration reduction
Reexamination Certificate
2003-02-13
2004-11-09
Dayoan, D. Glenn (Department: 3612)
Land vehicles: bodies and tops
Bodies
Vibration reduction
C296S039300
Reexamination Certificate
active
06814382
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a car door structure comprising a door inner panel and a door trim, and a noise insulation sheet applied to the car door structure.
2. Description of the Related Arts
Conventionally, as shown in
FIG. 27
, an interior door trim, which is installed to the interior side of the door inner panel, is provided with felt
2
or urethane at the back side thereof, or the door inner panel is provided with an urethane foam in order to provide an efficient noise insulation effect to the inside of a car door
100
.
For example, Japanese utility model publication No. 5-23376 discloses a door trim provided with a pad material consisting of an urethane foam and the like. Further, Japanese unexamined patent publication No. 10-119159 discloses a noise insulation cover made of an urethane foam.
[Problems to be Solved by the Invention]
However, the noise insulation effects in the prior arts were deficient since the felt
2
, urethane, pad material, and a noise insulation cover were all prepared separate from the door inner panel or the door trim, and they were installed merely in a smaller part of the door trim
1
or the interior side of a door inner panel.
Further, there was a difficulty in an installation operation because they had to be installed in a certain area of the door inner panel or the door trim.
An object of the present invention, therefore, is to provide a car door structure which has an efficient noise insulation effect and is easy to install.
SUMMARY OF THE INVENTION
A car door structure according to a first aspect of the invention comprises a door inner panel (
11
), an interior door trim (
12
) and a noise insulation sheet (
20
). The interior door trim (
12
) is installed in the interior side of the door inner panel (
11
). The noise insulation sheet (
20
) is provided between the door inner panel (
11
) and the door trim (
12
), where it is hung down from the upper side to the lower side of the door inner panel like a curtain (more specifically a Japanese style curtain called “noren”). The noise insulation sheet (
20
) is fixed to either the door inner panel (
11
) or the door trim (
12
).
A car door structure according to a second aspect of the invention comprises a door inner panel (
11
), an interior door trim (
12
) and a noise insulation sheet (
20
). The door trim (
12
) is installed in the interior side of the door inner panel (
11
). The noise insulation sheet (
20
) is provided between the door inner panel (
11
) and the door trim (
12
), where it is hung down from the upper side to the lower side of the door inner panel (
11
) like a curtain. The noise insulation sheet (
20
) is fixed to either the door inner panel (
11
) or the door trim (
12
) at the upper part thereof.
A car door structure according to a third aspect of the invention comprises a door inner panel (
11
), an interior door trim (
12
) and a noise insulation sheet (
20
). The door trim (
12
) is installed in the interior side of the door inner panel (
11
). The noise insulation sheet (
20
) is provided between a door inner panel (
11
) and the door trim (
12
), where it is hung down from the upper side to the lower side of the door inner panel (
11
) like a curtain. The noise insulation sheet (
20
) is fixed to either the door inner panel (
11
) or the door trim (
12
) at the left side part (
105
) and right side part (
105
) thereof A car door structure according to a fourth aspect of the invention is invented based on the invention claimed in claim
1
,
2
or
3
, wherein the noise insulation sheet (
20
) is provided at about an upper half or a lower half of the door inner panel (
11
). A car door structure according to a fifth aspect of the invention is also invented base on the invention claimed in claim
1
,
2
or
3
, wherein the noise insulation sheet (
20
) is provided at a central part of the door inner panel (
11
). The central part is the mid portion of the door inner panel (
11
) when it is divided approximately into three sections in a vertical direction or a horizontal direction.
A car door structure according to a sixth aspect of the invention comprises a door inner panel (
11
), an interior door trim (
12
), a noise insulation sheet (
20
), an inner weather strip (
15
) and a door glass (
102
). The door trim (
12
) is installed in the interior side of the door inner panel (
11
). The inner weather strip (
15
) comprises seal lips (
17
,
18
) which make resilient contacts with the door glass (
102
). The inner weather strip is secured to the door inner panel (
11
) or the door trim (
12
). The noise insulation sheet (
20
) is provided between the door inner panel (
11
) and the door trim (
12
), where it is hung down from the upper side to the lower side of the door inner panel (
11
) like a curtain. The noise insulation sheet (
20
) is fixed to the inner weather strip at the upper part thereof.
A car door structure according to a seventh aspect of the invention comprises a door inner panel (
11
), an interior door trim (
12
), a noise insulation sheet (
20
) and a door glass (
102
). The door trim (
12
) is also provided over the door inner panel (
11
) to the interior side of the door inner panel (
11
). The inner weather strip comprises seal lips (
17
,
18
) for making resilient contacts with the door glass (
102
). The weather strip is provided at the upper part of the door trim (
12
). The noise insulation sheet (
20
) is hung down between the door inner panel (
11
) and the door trim (
12
) like a curtain, covering at least the upper edge of the door inner panel.
A car door structure according to an eighth aspect of the invention is based on the seventh aspect of the invention, in which the upper end of the noise insulation sheet (
20
) is fixed to the inner weather strip (
15
). A car door structure according to a ninth aspect of the invention is also based on the seventh aspect of the invention, in which the upper end of the noise insulation sheet (
20
) is fixed to the door trim (
12
) or the door inner panel (
11
).
A car door structure according to a tenth aspect of the invention is also invented based on the seventh aspect of the invention, in which the door trim (
12
) comprises a channel part (
13
) at the upper part thereof. The channel part (
13
) receives an attachment base (
16
) of the inner weather strip (
15
). The channel part (
13
) has a concave shape in section. The channel part (
13
) is provided with leg parts (
14
) at the lower end thereof, which extends in a downward direction. Each leg part (
14
) supports a part (
19
) of the inner weather strip (
15
) from underneath. The noise insulation sheet (
20
) is fixed between the leg parts (
14
) and some portions of the inner weather strip (
15
) corresponding to the leg parts (
14
).
A car door structure according to a eleventh aspect of the invention is also invented based on the seventh aspect of the invention, in which the door trim (
12
) comprises a channel part (
13
) at the upper part thereof. The channel part (
13
), having a concave shape in section, receives an attachment base (
16
) of the inner weather strip (
15
). The channel part (
13
) comprises leg parts (
14
) at the lower part thereof with certain intervals, which extend in a downward direction. Each leg part (
14
) receives a part (
19
) of the inner weather strip (
15
). The upper part of the noise insulation sheet (
30
) is fixed to some parts (
19
) of the inner weather strip (
15
) where the leg parts (
14
) are unprovided and the inner weather strip (
15
) is exposed. The noise insulation sheet (
30
) is unfixed at portions where the leg parts (
14
) are provided as the upper end of the sheet (
30
) is lowered.
A car door structure according to a twelfth aspect of the invention comprises a door inner panel (
11
), an interior door trim (
12
), a noise insulation sheet (
20
) and an inner weather strip (
15
). The door trim (
12
) is installed in the interior side of the door inner panel (
11
). The noise insulation sheet (
20
) is provided
Arata Mitsuaki
Baba Eiichi
Emori Shinichiro
Isobe Masami
Kobayashi Tatsuo
Chenevert Paul
Dayoan D. Glenn
Nishikawa Rubber Co. Ltd.
LandOfFree
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