Cordless window curtain

Abstract

A cordless window curtain has a window curtain rod, a curtain body, lateral rails, a locating rope assembly and an elastic tension component. The reducing guide slots are set at one side of the lateral rails facing the curtain body and connected with the hollow slot. The width of the reducing guide slot must be smaller than that of the lateral rail and the width of the reducing guide slot is preferably between 2 mm and 5.9 mm. Two flanged guide shafts are protruded from both ends of the hollow bottom rod of the curtain body. These two flanged guide shafts are provided with a through-hole for threading of two lower locating sections of the locating rope assembly. The outer end of two flanged guide shafts is inserted into the reducing guide slot, such that the flanged guide shaft can slide vertically along the path of the reducing guide slot.

1 . A cordless window curtain comprising:
 a window curtain rod, transversely arranged rodlike, comprising of a hollow chamber and at least two assembly elements;   a curtain body, hung vertically at the bottom of the window curtain rod in an elevatable state; the curtain body is provided with multiple rope-pulling holes arranged vertically; and a hollow bottom rod is assembled at the bottom of the curtain body;   two lateral rails, set at both sides of the curtain body in a vertical extension state; a hollow slot is formed within the lateral rail, and a rope head locating seat is set at bottom of the lateral rail;   a locating rope assembly, comprising of an upper locating section, two curtain body threading sections and two lower locating sections; of which the upper locating section is accommodated into the hollow chamber of the window curtain rod, allowing for hanging securely the upper end of the locating rope assembly; two curtain body threading sections are located at interval, and extended vertically into the rope-pulling holes of the curtain body; two lower locating sections are joined reversely and extended into the hollow bottom rod at bottom of the curtain body; besides, the ends of two lower locating sections are fixed separately onto the rope head locating seat of two lateral rails, so as to form the lower fixing point of the locating rope assembly;   an elastic tension component, set onto the upper locating section of the locating rope assembly, and used to keep the locating rope assembly in certain elastic tension;   two reducing guide slots, set at one side of two lateral rails facing the curtain body and connected with the hollow slot; the width of the reducing guide slot being smaller than that of the lateral rail; and the width of the reducing guide slot is preferably between 2 mm and 5.9 mm;   two flanged guide shafts, protruded from left and right ends of the hollow bottom rod of the curtain body; these two flanged guide shafts are provided with a through-hole for threading of two lower locating sections of the locating rope assembly; and the outer end of two flanged guide shafts is inserted into the reducing guide slot of two lateral rails, such that the flanged guide shaft can slide vertically along the path of the reducing guide slot.   
     
     
         2 . The structure defined in  claim 1 , wherein said curtain body is a shutter or a folding window curtain. 
     
     
         3 . The structure defined in  claim 1 , wherein the assembly element of said window curtain rod is a rotary fastener, which comprises of a holding box and a fastening plate; the holding box is provided with a holding space and an assembly inlet set at one side of the holding space, such that the end of the window curtain rod can be assembled into the holding space through the assembly inlet; a locating hole is set at least one side of the holding box; the fastening plate is pivoted at one side of the holding box with assembly inlet; and the fastening plate can swing in an opening state, or is covered onto the assembly inlet in a closing state; moreover, male and female locking portions that can be interlocked together are set on the fastening plate and holding box, such that the closing state of the fastening plate can be positioned.