Cordless Roller Shade

Abstract

A cordless roller shade includes at least an upper elongate support, a lower elongate support, an anchor seat and an automatic winding means. The anchor seat and the automatic winding means are installed on two end of the upper elongate support. A shade assembly also is provided that has an axle at one side coupling with the anchor seat and rotatable. The automatic winding means has a second cap assembly hinged a second cap inside that has a second shaft on another side. The second cap holds a wound elastic element inside. The second shaft is coupled with the axle of the shade assembly. Through rotation of the second cap the cordless roller shade can be retracted and extended easily and smoothly.

1 . A cordless roller shade, comprising:
 an upper elongated support;   a lower elongated support spaced from the upper elongated support at a lower side;   a shade assembly which is located between the upper elongated support and the lower elongated support and has an axle on one side thereof;   an anchor seat located at one end of the upper elongated support and coupled with the axle; and   an automatic winding means which is located at another end of the upper elongated support and coupled with the shade assembly and has an elastic element located inside to transmit the shade assembly.   
   
   
       2 . The cordless roller shade of  claim 1 , wherein the anchor seat has a first cap assembly hinged a rotary assembly inside. 
   
   
       3 . The cordless roller shade of  claim 2 , wherein the first cap assembly has a first coupling member which has a first housing space at one side and a first latch member extended from another side, the rotary assembly being held in the first housing space and having a first shaft on one side thereof. 
   
   
       4 . The cordless roller shade of  claim 3  further having first lid to cover the one side of the first coupling member, the first lid having a first strut extended from one side thereof. 
   
   
       5 . The cordless roller shade of  claim 1 , wherein the anchor seat has an upright plate which has a first latch member extended from one side to be wedged in the upper elongated support and a second shaft extended from the one side. 
   
   
       6 . The cordless roller shade of  claim 1 , wherein the elastic element is wound and held in a second cap which has a second shaft on one side. 
   
   
       7 . The cordless roller shade of  claim 6 , wherein the automatic winding means has a second coupling member which has a second housing space at one side and a second latch member extended from another side, the second cap being held in the second housing space. 
   
   
       8 . The cordless roller shade of  claim 7  further having a second lid to cover the one side of the second coupling member and a second strut extended from one side thereof that has a second latch slot latched by one end of the elastic element. 
   
   
       9 . A cordless roller shade, comprising:
 a hollow and upper elongate support;   a lower elongate support spaced from the upper elongated support at a lower side;   a transverse moving means which is located on the upper elongate support and includes at least:
 a first plate and a second plate located at two ends of the upper elongate support; 
 an anchor member which is fastened to the upper elongate support and has a guiding wheel located thereon; 
 a latch rod which is located on the upper elongate support and has two ends coupling respectively on the first plate and the second plate; and 
 a first fastening plate and a second fastening plate that have respectively a boss located thereon to run through the upper elongate support and be fastened to the bottom of the first plate and the second plate and having an upright plate directing downwards from one end thereof; 
   a shade lifting assembly which is located between the upper elongate support and the lower elongate support and has a first panel and a second panel and a first lift cord and a second lift cord linking to the transverse moving means; and   an automatic winding means which is located at one end of the upper elongate support and linked to the panel lift cord assembly and has an elastic element located inside to transmit the panel lift cord assembly.   
   
   
       10 . The cordless roller shade of  claim 9 , wherein the first plate has a plurality of first fastening holes at one end, the second plate having a plurality of second fastening holes at one end thereof, the first and second fastening plates being fastened to the bottom of the first plate and the second plate through the first and second fastening holes. 
   
   
       11 . The cordless roller shade of  claim 9 , wherein the first panel and the second panel have zebra stripes formed thereon. 
   
   
       12 . The cordless roller shade of  claim 9 , wherein the first lift cord is fastened to a first hole formed on the first plate and threaded through the upper elongate support, the second lift cord being fastened to a second hole formed on the first plate and wound around the guiding wheel and threaded through the upper elongate support. 
   
   
       13 . The cordless roller shade of  claim 9 , wherein the first panel has one end coupled with the upright plate of the first fastening plate and the second fastening plate and is movable reciprocally through the first lift cord and the second lift cord. 
   
   
       14 . The cordless roller shade of  claim 9 , wherein the automatic winding means includes at least one transmission assembly and a transmission shaft coupling with the transmission assembly. 
   
   
       15 . The cordless roller shade of  claim 14 , wherein the transmission assembly includes a plurality of engaging gears and the elastic element. 
   
   
       16 . The cordless roller shade of  claim 15 , wherein the transmission assembly has a first gear coupling with the transmission shaft and a third gear extended to form a shaft. 
   
   
       17 . The cordless roller shade of  claim 16 , wherein the transmission shaft is coupled with the first panel and the shaft is coupled with the second panel.