Patent Application
20120037321
1. Field of the Invention
This invention relates to a mounting head rod for a roll-up window blind and particularly for a sideway slidable roll-up window blind. The length of the rod is adjustable for mounting the window blind in window openings of various widths.
2. Background Art
A sideway slidable window blind generally consists of two window blind panels mounted side by side on a head rod of a fixed length which is equal to the length of the inside length of an adjustable external housing. The length of the housing is variable for mounting it inside the width of window frames of various widths. Commonly, the panels are mounted to the head rod with two slidable rods. The window blind panels are slidably adjustable sideway to provide selected manners of covering of the window.
A mounting housing for a new type of sideway slidable roll-up window blind is shown in U.S. Pat. No. 7,621,313 issued on Nov. 24, 2009 to the inventor of the present application. In such new type of sideway slidable roll-up window blind, two blind panels are mounted on a composite head rod having two tubular rods telescopically mounted to one another. The panels are slidable sideway in aligned bottom slots formed in the two tubular rods, so that the panels may be pulled sideway relative to one another to provide a selected amount of covering for the window. However, the inclusion of external adjustable housing renders the mounting relatively complex and cumbersome to handle.
It is a principal object of the present invention to provide an adjustable head rod without external housing for a sideway adjustable roll-up window blind.
It is another object of the present invention to provide an adjustable head rod having two tubular rods telescopically mounted together to an inner rod which is mounted to the window frame. One panel of the blind is slidable sideway relative to the other panel to provide a selected manner of covering for the window.
It is yet another object of the present invention to provide a head rod for a sideway adjustable roll-up window blind in which the roll-up mechanism for the blind panels is directly mounted to the rod.
It is another object of the present invention to provide an adjustable head rod for a roll-up window blind in which the blind panels are mounted to two tubular rods slidably mounted to one another and the two tubular rods are, in turn, mounted to a telescopic inner rod adjustable for mounting the head rod to windows of various widths.
It is still another object of the present invention to provide an adjustable head rod for a roll-up window blind, in which the rod has a simple construction and is easy to install to a window frame.
The objects, advantages and other features of the present invention will become more apparent upon reading of the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
In the appended drawings:
With reference to the drawings in which like reference numerals designate same parts in the different views, the head rod 10 of a roll-up blind 11 has a first elongated outer tubular rod 12 of a predetermined fixed length for mounting within a window frame. The outer rod 12 is rotatably mounted to two brackets (not shown) secured to the inner side walls of the window frame. A teethed wheel 13 is mounted at one end of the tubular outer rod 12 such that the rod 12 may be rotatably operated with a pull chain engaged with the wheel 13 in the conventional manner. A slot 14 is formed at the bottom of the tubular outer rod 12. The bottom slot 14 extends throughout the entire length of the outer rod 12. A second rod 15, preferably also tubular in construction, and having an outer diameter slightly smaller than the inside diameter of the outer rod 12 and having a length longer half the length of the outer rod 12. The second rod 15 is slidably mounted within the end portion of the outer rod 12 and located opposite to the teethed wheel 13.
A first window blind panel 16 having an upper end secured to the outer rod 12 and located juxtaposed to the teethed wheel 13. The first window blind panel 16 has a width slightly wider than half the length of the outer rod 12.
A second window blind panel 17 has an upper end secured to the second rod 15 with the panel extending downward through the bottom slot 14 of the outer rod 12. The first window blind panel 16 and the second window blind panel 17 preferably have inner vertical side edge portions overlapping with one another as best shown in
A spacer ring 18 may be mounted in the end portion of the outer rod 12 at the end with the teethed wheel 13 mounted thereon.
A second embodiment of the head rod according to the present invention is best shown in
The end portion of the inner rod 19 slidably engaged with the opening 20 of the spacer ring 18 for supporting the inner rod 19 in a horizontal position so that the window blind panels 16 and 17 would wind properly onto the head rod 10. The spacer ring 18 may be made of a plastic material.
A third embodiment of the present invention is provided with a telescopic inner tube 19 consisting of two tubular rods 21 and 22 telescopically and slidably mounted to one another. The telescopic inner tube 19 is adjustable in a selected length for mounting the head rod 10 in window frames of various widths. The first tubular rod and the second tubular rod have the same construction a in the second embodiment as described above.
It can be appreciated from the above description that the head rod of the present invention has simple construction and can be easily installed in a window frame.
While I have shown and described the preferred embodiments of the present invention, I wish it to be understood that I do not confine myself to the precise details of the exemplary constructions herein set forth by way of illustration, as it is apparent that many changes and variations may be made therein, by those skilled in the art, without departing from the spirit of the invention or exceeding the scope of the appended claims.
