Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Reexamination Certificate
2001-01-22
2002-05-28
Purol, David M. (Department: 3634)
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
Reexamination Certificate
active
06394170
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention is related to an operating structure for vertically collecting/shutting a blind. The pulling cords of the operating structure are back and forth interlacedly arranged so that the total length of the pulling cord is shortened and the material cost for the pulling cord is reduced. In addition, when upward pulling and collecting the slats, the pulling length of the pulling cord is shorter so that the time for collection of the slats is reduced. Also, after collected, it is avoided that the pulling cord extends out from the upper beam by a very long length so that the appearance of the blind will not be affected and the pulling cord is not so liable to be hooked by an alien article.
FIGS. 1 and 2
show a conventional blind. A fixing seat
11
is mounted on a rack
10
. A slat-controlling element
12
is pivotally disposed on the center of the top of the fixing seat
11
. The slat-controlling element
12
is driven by a controlling shaft
13
which is driven by a rod body
14
controlled by a user. A pulling ladder cord
15
is fixed with the slat-controlling element
12
. The pulling ladder cord
15
has two lateral main cords
151
and multiple restricting cords
152
positioned between the main cords
151
. Slats
16
are passed through the spaces between the restricting cords
152
. The bottom of the main cord
151
is fixed on a base seat
17
. The slat
16
is formed with a locating notch
161
corresponding to the main cord
151
. Several hanging cords
18
are further disposed beside the main cord
151
for hanging and pulling the entire body. The hanging cord
18
has a fixed end
181
fixed with one side of the fixing seat
11
. The hanging cord
18
is then wound through the respective slats
16
and the base seat
17
and passed through the fixing seat
11
into the rack
10
. The other end of the hanging cord
18
serves as a pulling end
182
for a user to pull.
The above conventional structure has some shortcomings as follows:
1. The hanging cord
18
is conducted and wound on two lateral ends of the slats
16
and the base seat
17
. Accordingly, the hanging cord
18
must have a considerable length so that the cost for the material will be increased.
2. The hanging cord
18
has a very long length so that when pulled upward to collect the slats, it takes much time to pull the hanging cord
18
.
3. After pulled upward to collect the slats, the very long hanging cord
18
will extend out from the rack
10
by a very long length (with reference to FIG.
3
). The extending hanging cord
18
will affect the appearance of the blind and is liable to be hooked by an alien article. Therefore, the safety in use of the blind cannot be ensured.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide an operating structure for vertically collecting/shutting a blind. The pulling cords of the operating structure are respectively back and forth interlacedly extended and fixed on one side of the base seat. Therefore, the total length of the pulling cord is shortened and the material cost for the pulling cord is reduced.
It is a further object of the present invention to provide the above operating structure in which the pulling cords are back and forth interlacedly arranged with a certain length. Therefore, when upward pulling and collecting the slats, the pulling length of the pulling cord is shorter so that the time for collection of the slats is reduced.
It is still a further object of the present invention to provide the above operating structure in which the pulling cord has a suitable length. Therefore, after pulled upward to collect the slats, it is avoided that the pulling cord extends out from the upper beam by a very long length. Therefore, the appearance of the blind will not be affected and the pulling cord is not so liable to be hooked by an alien article.
The present invention can be best understood through the following description and accompanying drawings wherein:
REFERENCES:
patent: 3727665 (1973-04-01), Debs
patent: 5060709 (1991-10-01), Simon
patent: 5573051 (1996-11-01), Judkins
patent: 6179035 (2001-01-01), Anderson
patent: 6192963 (2001-02-01), Chen
Bacon & Thomas PLLC
Chin Feng Blinds Ind. Co., Ltd.
Purol David M.
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