Sound insulating weather strip

Details Sound insulating weather strip Sound insulating weather strip

2001-03-19

2003-12-30

Redman, Jerry (Department: 3634)

Movable or removable closures

Closure seal; e.g., striker gasket or weatherstrip

Tubular or tubular portion

Reexamination Certificate

active

06668489

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a weather strip which is high sound-insulating effect and which is attached to a car.
BACKGROUND ART OF THE INVENTION
Description will be made with reference to
FIGS. 1
to
3
. In a weather strips
30
according to the background art to be attached to a door sash
20
of a car, a member to be attached on a roof
22
side is constituted by a base portion
32
, a hollow seal portion
31
and a lip portion
33
as shown in FIG.
2
. The base portion
32
is a portion to be fitted to the door sash
20
. The hollow seal portion
31
and the lip portion
33
are brought into elastic contact with a body panel
21
so as to exhibit sealing properties. On the other hand, one of the weather strips to be attached on a center pillar
23
side is constituted by a base portion
32
, a hollow seal portion
31
and a small lip portion
34
as shown in FIG.
3
. The small lip portion
34
is brought into elastic contact with the door sash
20
.
In the weather strips
30
configured thus, particularly the hollow seal portion
31
is required to have a sound insulating function for blocking the entrance of external sound, as well as a waterproof function for blocking the entrance of water such as rainwater, car-washing water, etc.
However, the hollow seal portion
31
in the background-art weather strips
30
cannot be considered to have a satisfactory sound insulating function. Therefore, there is a problem that external noise is apt to enter the cabin even when the window glass has been shut up.
Examples of other weather strips include an opening whether strip, a drip weather strip, a trunk weather strip, a hard top weather strip, etc., and such weather strips are attached to a body flange, a sash, a retainer, or the like, of a car. In each of the weather strips, a hollow seal portion is brought into elastic contact with a door, a glass, or a body, so as to exhibit sealing properties. Thus, these weather strips are also required to have a function of blocking the entrance of external sound.
SUMMARY OF THE INVENTION
The present invention has been made to solve the above-described problem.
Accordingly, an object of the present invention is to provide a sound insulating weather strip having satisfactory sound-insulating function so as to prevent external noise from easily entering into the cabin.
Other objects and effects of the present invention will become apparent from the following description.
With reference to FIG.
1
and
FIGS. 4
to
19
, the above-described objects of the invention have been achieved by providing the following sound insulating weather strips.
According to a first aspect of the present invention, the sound insulating weather strip comprises: a hollow seal portion
11
to be attached to at least one of a door sash
20
or glass
20
a
and a body panel
21
of a car; and a low density foam sponge material
17
comprising a rubber or synthetic resin, and provided at a portion in the hollow seal portion
11
which is to be held and compressed between the door sash
20
or a glass
20
a
and the body panel
21
when the door is closed.
In a second aspect of the invention, the low density foam sponge material
17
according to the first aspect of the invention has a specific gravity smaller than that of the hollow seal portion
11
.
In a third aspect of the present invention, the low density foam sponge material
17
according to the first or second aspect of the invention has a specific gravity of from 0.1 to 0.3.
In a fourth aspect of the present invention, the low density foam sponge material
17
according to the first, second or third aspect of the invention is extrusion-molded integrally with the hollow seal portion.


REFERENCES:
patent: 3159886 (1964-12-01), Lynch
patent: 4702039 (1987-10-01), Bocchinfuso
patent: 4919471 (1990-04-01), Seino et al.
patent: 5511343 (1996-04-01), Guillon
patent: 5586772 (1996-12-01), Deaver
patent: 5693419 (1997-12-01), Nozaki
patent: 5852898 (1998-12-01), Hikosaka et al.
patent: 5970659 (1999-10-01), Oord
patent: 6119404 (2000-09-01), Bschorr et al.
patent: 6158171 (2000-12-01), Kellogg et al.
patent: 6266925 (2001-07-01), Camerer

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