Movable block set for curtain

Abstract

A removable block set for a window covering includes an inner block, an outer block and at least a connecting block between the inner block and the outer block. The inner block, the connecting block and the outer block are assembled together through the tenons and the slot tunnels therebetween, and the removable block set can be installed at two sections of the cases of the upper and the lower rails of the window covering. Therefore, through changing the whole length of the removable block set, the length of the upper and the lower rails (including the removable block set) may have a better conformation to the width of the window, and a more convenient installation of the window covering can be provided.

1 . A removable block set for a window covering, comprising an inner block, an outer block and at least one connecting block between the inner block and the outer block, wherein:
 the inner block has an assembling portion formed at one side thereof and has an engaging space formed at the other side thereof, the engaging space having a slot tunnel correspondingly formed at an inner side thereof;   the connecting block is assembled in the engaging space of the inner bloc the connecting block has an engaging portion formed at one side thereof, which faces the inner block, the engaging portion having a tenon at an outer side thereof, and the connecting block has the engaging space formed on the other side thereof for engaging with the engaging portion, the engaging space having the slot tunnel formed at the inner side thereof for correspondingly engaging with the tenon; and   the outer block is assembled to one side of the connecting block which is opposite to the side thereof facing the inner block, the outer block has an engaging portion formed at one side thereof facing the connecting block for correspondingly engaging with the engaging space of adjacent connecting block, and the engaging portion has the tenon formed at the outer side thereof.   
   
   
       2 . The removable block set for a window covering as claimed in  claim 1 , wherein the tenon of the connecting block and the tenon of the outer block are formed to be arc protrusions, and the engaging space of the inner block and the engaging space of the connecting block are formed to have arc slot tunnel corresponding to the arc protrusion. 
   
   
       3 . The removable block set for a window covering as claimed in  claim 1 , wherein the tenon of the connecting block and the tenon of the outer block respectively have slots at two sides thereof. 
   
   
       4 . The removable block set for a window covering as claimed in  claim 1 , wherein the tenon of the connecting block and the tenon of the outer block are mounted at two edges or four edges of the outer side of the engaging portion. 
   
   
       5 . The removable block set for a window covering as claimed in  claim 1 , wherein the frame of the connecting block and the frame of the outer block respectively have indentations.