BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an adjustable structure of a curtain for adjusting the angle of curtain blade in accordance with the present invention;
FIG. 2 is a structural view of a roller in accordance with the present invention;
FIG. 3 is another perspective view of the adjustable structure of a curtain for adjusting the angle of curtain blade in accordance with the present invention;
FIG. 4 is an operational view of the adjustable structure of a curtain for adjusting the angle of curtain blade in accordance with the present invention;
FIG. 5 is another operational view of the adjustable structure of a curtain for adjusting the angle of curtain blade in accordance with the present invention;
FIG. 6 is a further perspective view of showing the rotation of the curtain blades; and
FIG. 7 is a cross sectional view of the adjustable structure of a curtain for adjusting the angle of curtain blade in accordance with the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
An adjustable structure of a curtain for adjusting the angle of curtain blade in accordance with the present invention comprises a winding tube 3 disposed in an upper rail 1 of a curtain 10, a pulling string 21 for controlling the rise and fall of the curtain winds around the winding tube 3 and is then passed through curtain blades 4 (as shown in FIGS. 1 and 2). One end of the winding tube 3 is disposed with a rubbing wheel 31 for hanging the top end of a suspending string 5 that is provided for insertion of the curtain blades 4. Thereby, during the rise and fall of the curtain blades 4, the suspending string 5 is pulled towards the rotating direction of the winding tube 3 firstly, so that the angle of the curtain blades 4 is adjusted.
Since the winding tube 3 serves as a guiding wheel when the pulling string 21 pulls the curtain blades 4, the winding tube 3 will be rotated by pulling the pulling string 21 (the position of the pulling string 21 is controlled by a winder 2, or a manual string 22 as shown in FIG. 3). Since one end of the winding tube 3 is disposed with the rubbing wheel 31 (the rubbing wheel 31 rotates along with the winding tube 3), the suspending string 5 hanged on the rubbing wheel 31 will also be rotated along with the winding tube 3. However, there will appear a dead point after the angle of the curtain blades 4 connected beneath the suspending string 5 is adjusted to such an extent the curtain blades 4 are brought into contact with each other (as shown in FIGS. 4 and 5), the curtain blades 4 will be maintained in a skewed position during the rise and fall of the curtain. After the curtain blades 4 are adjusted to a predetermined position, and when the user slightly reverse the curtain blades 4, since the rotating direction of the rubbing wheel 31 is changed according to that of the winding tube 3, and the rotation angle of the suspending string 5 is adjusted by the rubbing wheel 31 (as shown in FIGS. 6 and 7, if the curtain blades 4 are skewed outward at the beginning, the curtain blades 4 can be rotated to the horizontal position and finally adjusted to an inwardly-skewed position), and thus the angle of the curtain blades 4 can be controlled easily. By such arrangement, the rise and fall motion and the angle-adjustment of the curtain blades 4 can be achieved simultaneously. Therefore, the curtain 10 is easy to operate, low cost, and has a nice appearance.
Since the rubbing wheel 31 rotates along with the winding tube 3, and not limited to being coaxial with the winding tube 3, and the size of the winding tube 3 and the rubbing wheel 31 can be different (in the present invention, the rubbing wheel 31 is a little bigger than the winding tube 3, thus obtaining a bigger friction between the suspending string 5 and the rubbing wheel 31). In addition, the direction of the rubbing wheel 31 can be reversed to that of the winding tube 3 (for example, the winding tube 3 and the rubbing wheel 31 is connected by a gear).
While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Patent Application
20080035280
