Variable roller blind structure

Abstract

A variable roller blind structure includes a roller blind made up of more than one blind bodies that are respectively attached to the underside of a rotatable roller shaft and a stable roller shaft juxtaposed at an interval and mounted at the inner side of an upper beam. The blind body has a plurality of light-passable areas alternatively arranged with a plurality of black-out areas disposed at the surface thereon, and a winding unit is mutually engaged with the rotatable roller shaft to be controlled by an operating member that is pulled either clockwise or counterclockwise to actuate the movement of the rotatable roller shaft accordingly so as to control the rolling or unrolling operation of the blind body thereby. Via the structure above, the blind bodies of the roller blind can have it both ways with partial transparency and partial sheltering effect for privacy purpose. Besides, when the rotatable roller shaft is wound by the operating member to actuate the rolling movement the blind body till the light-passable areas of the blind body rolled upwards are correspondingly juxtaposed with the black-out areas of the other blind body, the light-passable areas of each blind body thereof can be precisely sheltered by the black-out areas of the other respectively, completely blocking out all light outdoors so as to achieve a total sheltering effect thereof. Thus, the roller blind thereof is capable of being variably operated to cater to the needs of users and is efficiently boosted in its functions thereof.

1 - 10 . (canceled)  
     
     
         11 . A variable roller blind structure comprising: 
 a) an upper beam;    b) a rotatable roller shaft rotatably connected to the upper beam;    c) a first blind body connected at a top thereof to the rotatable roller shaft and having: 
 i) a plurality of first light passable areas extending horizontally between left and right edges thereof; and  
 ii) a plurality of first black-out areas extending horizontally between the left and the right edges thereof, one of the plurality of first light passable areas is alternatively positioned adjacent each of the plurality of first black-out areas;  
   d) a stationary roller shaft fixedly connected to the upper beam and spaced apart a predetermined distance from the rotatable roller shaft;    e) a second blind body connected at a top thereof to the stationary roller shaft and having: 
 i) a plurality of second light passable areas extending horizontally between left and right edges thereof; and  
 ii) a plurality of second black-out areas extending horizontally between the left and the right edges thereof, one of the plurality of second light passable areas is alternatively positioned adjacent each of the plurality of second black-out areas; and  
   f) a winding unit connected to and controlling a rotation of the rotatable roller shaft,    wherein the rotatable roller shaft is rotated raising and lowering the first blind body relative to the second blind body and controlling a level of light by positioning the plurality of first light passable areas and the plurality of first black-out areas relative to the plurality of second light passable areas and the plurality of second black-out areas.    
     
     
         12 . The variable roller blind structure according to  claim 11 , wherein the winding unit is rotatable clockwise and counterclockwise and the first blind body is wound around the winding unit in a direction selected from clockwise and counterclockwise.  
     
     
         13 . The variable roller blind structure according to  claim 11 , wherein the plurality of first light passable areas and the plurality of second light passable areas are made of a net material.  
     
     
         14 . The variable roller blind structure according to  claim 11 , wherein the plurality of first light passable areas and the plurality of second light passable areas are made of a porous material.  
     
     
         15 . The variable roller blind structure according to  claim 11 , wherein the plurality of first black-out areas and the plurality of second black-out areas have a height higher than a height of the plurality of first light passable areas and the plurality of second light passable areas respectively.  
     
     
         16 . The variable roller blind structure according to  claim 11 , wherein the winding unit having a beaded chain manually controlling the movement thereof.  
     
     
         17 . The variable roller blind structure according to  claim 11 , wherein the winding unit having a spring element and a pull cord controlling the movement thereof.  
     
     
         18 . The variable roller blind structure according to  claim 11 , wherein the first blind body having a counterweight member connected to a bottom thereof.  
     
     
         19 . The variable roller blind structure according to  claim 18 , wherein the counter weight member having a shape selected from a group consisting of a round post and an elongated shape.  
     
     
         20 . The variable roller blind structure according to  claim 11 , wherein the second blind body having a counter weight member connected to a bottom thereof.  
     
     
         21 . The variable roller blind structure according to  claim 20 , wherein the counter weight member having a shape selected from a group consisting of a round post and an elongated shape.