Information
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Patent Grant
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6234235
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Patent Number
6,234,235
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Date Filed
Thursday, February 24, 200025 years ago
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Date Issued
Tuesday, May 22, 200124 years ago
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Inventors
-
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Examiners
Agents
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CPC
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US Classifications
Field of Search
US
- 160 1681 R
- 160 173 R
- 160 1781 R
- 160 902
- 160 903
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International Classifications
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Abstract
A Venetian blind having a head rail with a plurality of ladder cords and vertical cords vertically mounted and spaced apart therebelow, a plurality of slats being positioned between the ladder cords and the vertical cords formed a shade, the bottom of the head rail being a lower rail, characterized in that the external edge of the head rail is mounted with an upper rail formed from plastic injection molding for enabling cutting the length thereof, the cross-section of the upper rail is substantially “U” shaped and the edges of the upper rail are individually provided with two hook-like edges, and a plurality of holes are provided on the upper rail for the insertion of the ladder cords, the vertical cords, and a lift cord, to thereby provide support for a venetian blind within various sized structural openings.
Description
BACKGROUND OF THE INVENTION
a) Technical Field of the Invention
The present invention relates to an improved structure of a Venetian blind, and in particular, to a Venetian blind of simple structure such that the cost of manufacturing is low, and the blind has an aesthetic appearance.
b) Description of the Prior Art
FIG. 1
shows a conventional Venetian blind having a substantially U-shaped head rail
10
formed by bending an iron plate or by plastic molding. The bottom of the head rail
10
is provided with a plurality of ladder cords
11
spaced apart forming a support for a plurality of slats
12
. The bottom of the ladder cord
11
is provided with a heavy rod
13
, and the top of the ladder cord
11
is mounted to a control device
20
to control a control rod
21
of the control device
20
so as to elevate the slats
12
at the sides of the ladder cord
11
. Thus, the tilting angle of the slats
12
is adjusted to allow the amount of sunlight to enter. In addition, a plurality of vertical cords
14
, passing through individual slats
12
, are connected to the heavy rod
13
and one end thereof surrounds the head rail
10
. Due to the positioning device
30
at one side of the head rail
10
extended to the bottom of the blind forming into a lift cord
15
, the heavy rod
13
can be lifted up and the slats
12
are thus stacked one by one. By lowering the heavy rod
13
, the individual slats
12
return to their spaced apart position.
However, there are drawbacks found in this conventional Venetian blind as follows:
1) There are various specifications for the Venetian blind, which are not easily adapted to window of various sizes.
2) In order to comply with the size of the window, various types of head rails have to be made in order to insert the ladder cord
11
, the vertical cord
14
, the lift cord
15
and the control rod
20
. Thus, the cost of manufacturing is increased.
3) The strength of the conventional Venetian blind is insufficient as the head rail
10
is normally made from an iron plate and is bent into a “U” shaped structure. As there are a plurality of holes on the head rail
10
, it cannot withstand heavy weight.
SUMMARY OF THE INVENTION
The present invention relates to an improved structure of a Venetian blind, and in particular, to a Venetian blind of simple structure such that the cost of manufacturing is low, and the blind has an aesthetic appearance.
Accordingly, it is an object of the present invention to provide an improved structure of a Venetian blind having a head rail with a plurality of ladder cords and vertical cords vertically mounted and spaced apart therebelow, a plurality of slats being positioned between the ladder cords, and the vertical cord being formed into horizontal support, the bottom of the head rail being a lower rail, characterized in that the external edge of the head rail is mounted with an upper rail formed from plastic injection molding, and the cross-section of the upper rail is substantially a “U” shape and the edges of the upper rail are individually provided with two hook-like edges, and a plurality of holes are provided on the upper rail for the insertion of the ladder cords the vertical cords and a lift cord, thereby the upper rail of various sizes is adapted to the fixed size head rail.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a perspective view of a conventional Venetian blind.
FIG. 2
is a perspective exploded view of the head rail and the upper rail of the blind of the present invention.
FIG. 3
is a perspective view of the blind of the present invention.
FIG. 4
is a sectional view of the blind of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to
FIGS. 2
to
4
, there is shown an improved structure of a Venetian blind of the present invention comprising a head rail
40
mounted externally with an upper rail
50
, a plurality of ladder cords
41
and vertical cords
44
being mounted below the upper rail
50
, and a plurality of slats
42
being provided horizontally on the ladder cords
41
and the bottom section of the blind being a lower rail
43
, wherein the head rail
40
is made into a substantially rectangular box like structure, and the upper rail
50
is made by plastic injection molding. In accordance with the present invention, the shape of the cross-sectional of the upper rail
50
is a substantially U-shaped structure, and at the top edge of two lateral side
51
of the upper rail
50
, an inverted hook-like edge
52
is provided for the mounting with the head rail
40
. On the upper rail
50
, a plurality of holes
53
are provided for the insertion of the ladder cords
41
, the vertical cords
44
, the lift cord
45
and a control rod
61
. The top end of the ladder cord
41
is fixed with a control device
60
such that by rotating the control rod
61
of the control device
60
, the ladder cord
41
at the side of the slats
42
is controlled to tilt so as to change the tilting angle of the slats
42
to allow the sunlight to enter. The vertical cords
44
, passing through the slats
42
, are located in between the head rail
40
and the lower rail
43
, and the bottom ends of the vertical cords
44
are mounted onto the lower rail
43
, and one end of the vertical cord
44
surrounds the head rail
40
. A positioning device
70
mounted at one side of the head rail
40
and the lift cord
45
is mounted to the bottom section of the blind. Thus, the lower rail
43
can be lifted such that the slats
42
are stacked together, or when the lower rail
43
is released, the individual slats
42
are restored to space apart with an interval.
In accordance with the present invention, there are advantages as compared to the conventional Venetian blinds:
1) The size of the Venetian blinds is adaptable to all sizes of windows. The head rail
40
of the present invention is mounted externally with an upper rail
50
, the head rail
40
is made into a fixed size and then is mounted with the upper rail
50
made of different sizes. As the upper rail
50
is made from plastic injection, the making of holes or cutting is simple and quick. Therefore, it suits window of all sizes.
2) The cost of production is low.
The head rail
40
can be mass produced and therefore the cost of material for manufacturing the head rail
40
is lowered.
3) The strength of the upper rail is strong and the rail possesses an aesthetic appearance.
As the upper rail
50
is made by plastic molding, various types of embossed designs can be made to the upper rail
50
so as to add an aesthetic appearance to the upper rail
50
. In addition, the upper rail
50
is adapted by the head rail
40
which is made from a metallic material, therefore, the strength of the upper rail
50
is increased.
While the invention has been described with respect to a preferred embodiment, it will be clear to those skilled in the art that modifications and improvements may be made to the invention without departing from the spirit and scope of the invention. Therefore, the invention is not to be limited by the specific illustrative embodiment, but only by the scope of the appended claims.
Claims
- 1. A venetian blind comprising a head rail, a plurality of spaced apart ladder cords, vertical cords, and a lift cord; a plurality of slats positioned between and connected to said ladder cords, vertical cords, and lift cord forming a shade; said head rail having an elongated U-shaped top section and an elongated U-shaped bottom section; said bottom section having a fixed length along with lift and tilt controls mounted therein, wherein said bottom section is slidably received within the U-shape of said top section; said top section being formed from plastic injection molding to thereby provide means for cutting the length thereof to fit within various sized structural openings; said top and bottom sections each having inwardly extending edges that interengage when the bottom section is within the U-shape of the top section to thereby hold the sections together; said top section further comprising a plurality of holes in a bottom wall wherein said ladder cords, vertical cords, and a lift cord pass from the bottom section through the top section and extend downwardly therefrom, such that the top section supports the bottom section, the ladder cords, vertical cords, and a lift cord, and thereby the shade downwardly therefrom for providing support means for the blind within various sized structural openings.
Priority Claims (1)
Number |
Date |
Country |
Kind |
088221196 |
Dec 1999 |
TW |
|
US Referenced Citations (10)