Adjustable prop stand of window curtain

Abstract

An adjusting structure of adjustable window curtain prop stand includes two prop plates and an adjusting structure arranged between the two prop plates. The adjusting structure further includes a lead screw, two displacing elements, two positioning elements and a plurality of connecting elements. The lead screw has two external threads respectively with different directions of spiral and available for being engaged with the two displacing elements thereon. The two positioning elements are respectively secured to inner side faces of the two prop plates to be located at an upper and a lower positions between the two displacing elements, where each connecting element is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.

1 . An adjustable window curtain prop stand, including:
 two prop plates, which are arranged by interspacing to each other and respectively in an upper and a lower positions; and   an adjusting structure, which is disposed between the two prop plates, and further includes:   a lead screw, one side of which has an external thread;   two displacing elements, one of which is arranged by engaging onto the side of the lead screw having the external thread, and another of which is pivoted by fitting onto another side of the lead screw;   two positioning elements, which are respectively secured to two inner side faces corresponding to the two prop plates, and which are respectively located at an upper and a lower positions of the two displacing elements; and   a plurality of connecting elements, each of which is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.   
     
     
         2 . The adjustable window curtain prop stand according to  claim 1 , wherein another side of the lead screw is arranged a rotating knob facilitating in being rotated by a human hand. 
     
     
         3 . The adjustable window curtain prop stand according to  claim 1 , wherein the connecting elements have an equal length, making a symmetrically equal relationship formed for the linkage mechanism. 
     
     
         4 . The adjustable window curtain prop stand according to  claim 3 , wherein a quantity of the connecting elements is four. 
     
     
         5 . The adjustable window curtain prop stand according to  claim 1 , wherein each of the connecting elements is configured as a thin rod. 
     
     
         6 . The adjustable window curtain prop stand according to  claim 1 , wherein each of the connecting elements is configured as a stripe of flat plate. 
     
     
         7 . An adjusting structure of adjustable window curtain prop stand, including:
 a lead screw, one side of which has an external thread;   two displacing elements, one of which is arranged by engaging onto the side of the lead screw having the external thread, and another of which is pivoted by fitting onto another side of the lead screw;   two positioning elements, which are respectively located at an upper and a lower positions of the two displacing elements; and   a plurality of connecting elements, each of which is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.   
     
     
         8 . The adjustable structure of adjustable window curtain prop stand according to  claim 7 , wherein another side of the lead screw is arranged a rotating knob facilitating in being rotated by a human hand. 
     
     
         9 . The adjustable structure of adjustable window curtain prop stand according to  claim 7 , wherein the connecting elements have an equal length, making a symmetrically equal relationship formed for the linkage mechanism. 
     
     
         10 . The adjustable structure of adjustable window curtain prop stand according to  claim 9 , wherein a quantity of the connecting elements is four. 
     
     
         11 . The adjustable structure of adjustable window curtain prop stand according to  claim 7 , wherein each of the connecting elements is configured as a thin rod. 
     
     
         12 . The adjustable structure of adjustable window curtain prop stand according to  claim 7 , wherein each of the connecting elements is configured as a stripe of flat plate. 
     
     
         13 . An adjusting structure of adjustable window curtain prop stand, including:
 a lead screw, which has two external threads with two opposite directions of spiral;   two displacing elements, which are respectively arranged by engaging onto the two external threads of the lead screw;   two positioning elements, which are respectively located at an upper and a lower positions of the two displacing elements; and   a plurality of connecting elements, each of which is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.   
     
     
         14 . The adjustable structure of adjustable window curtain prop stand according to  claim 13 , wherein two sides of the lead screw are respectively arranged a rotating knob facilitating in being rotated by a human hand. 
     
     
         15 . The adjustable structure of adjustable window curtain prop stand according to  claim 13 , wherein the two external threads of the lead screw are respectively a left-handed thread and a right-handed thread, both of which are disposed symmetrically on the lead screw. 
     
     
         16 . The adjustable structure of adjustable window curtain prop stand according to  claim 13 , wherein the connecting elements have an equal length, making a symmetrically equal relationship formed for the linkage mechanism. 
     
     
         17 . The adjustable structure of adjustable window curtain prop stand according to  claim 16 , wherein a quantity of the connecting elements is four. 
     
     
         18 . The adjustable structure of adjustable window curtain prop stand according to  claim 13 , wherein each of the connecting elements is configured as a thin rod. 
     
     
         19 . The adjustable structure of adjustable window curtain prop stand according to  claim 13 , wherein each of the connecting elements is configured as a stripe of flat plate.