Positioning apparatus of a window shade

Abstract

The present invention provides a positioning apparatus of a window shade, installed on an upper beam or a lower beam of said window shade and functioned with a pulling string of said window shade to generate a positioning effect or being pulled thereof and with said pulling string in a tensioned state, said positioning apparatus of said window shade comprising: a supporting stand, having a body part and at least one installation part extended on one side of said body part; and at least one circular ring, attached to said body part, and said puling string at least partially surrounding a circumference of said at least one circular ring to form a winding thereon.

What is claimed is: 
     
         1 . A positioning apparatus of a window shade, installed on an upper beam or a lower beam of said window shade and functioned with a pulling string of said window shade to generate a positioning effect or being pulled thereof and with said pulling string in a tensioned state, said positioning apparatus of said window shade comprising:
 a supporting stand, having a body part;   at least one installation part disposed on one side of said body part; and   at least one circular ring, attached to said body part, and said pulling string at least partially surrounding the circumference of said at least one circular ring to form a winding thereon.   
     
     
         2 . The positioning apparatus of a window shade as claimed in  claim 1 , wherein said at least one installation part is of a quantity of one and extends rearward from said body part, and an at least one securing means is provided at a front side of said body part. 
     
     
         3 . The positioning apparatus of a window shade as claimed in  claim 1 , wherein said at least one installation part is of a quantity of two including an upper installation part and a lower installation part respectively and extend rearward from an upper end and a lower end of said body part respectively; said upper installation part and said lower installation part are provided above and below said at least one circular ring; and said at least one circular ring is arranged between said upper installation part and said lower installation part. 
     
     
         4 . The positioning apparatus of a window shade as claimed in  claim 3 , wherein said upper installation part comprises an upper slat and an upper block, and said upper slat extends forward from the top of said body part and said upper block extends downward from said upper slat; said lower installation part comprises a lower slat and a lower block, and said lower slat extends forward from the bottom of said body part and said lower block extends upward from said lower slat. 
     
     
         5 . The positioning apparatus of a window shade as claimed in  claim 4 , wherein said upper slat and said lower slat are parallel with each other and covers said at least one circular ring. 
     
     
         6 . The positioning apparatus of a window shade as claimed in  claim 4 , wherein said upper slat and said lower slat comprise a through-hole respectively provided for said pulling string to pass therethrough. 
     
     
         7 . The positioning apparatus of a window shade as claimed in  claim 4 , wherein two lateral edges of said body part of said supporting stand extend and bend outward to form an arched shape, and a side-to-side width of said body part is greater than a side-to-side width of said upper slat and said lower slat. 
     
     
         8 . The positioning apparatus of a window shade as claimed in  claim 1 , wherein said at least one circular ring comprises a securing means and a mounting ring; said securing means is provided on said body part and said mounting ring having an inner ring surface mounted onto said at least one securing means; the circumference of said mounting ring is indented inward to form a ring slot, and said puling string at least partially surrounds said ring slot of said at least one mounting ring to form a winding thereon. 
     
     
         9 . The positioning apparatus of a window shade as claimed in  claim 8 , wherein said at least one installation part is of a quantity of two including an upper installation part and a lower installation part respectively; said upper installation part comprises an upper slat and an upper block, and said upper slat extends forward from the top of said body part and said upper block extends downward from said upper slat; said lower installation part comprises a lower slat and a lower block, and said lower slat extends forward from the bottom of said body part and said lower block extends upward from said lower slat; a bottom surface of said upper slat and a top surface of said lower slat comprise a restrictor respectively; each one of said restrictor is adjacent to said ring slot of said at least one mounting ring without contacts and blocks said ring slot of said at least one mounting ring externally such that said pulling string is restricted within said ring slot of said at least one mounting ring. 
     
     
         10 . The positioning apparatus of a window shade as claimed in  claim 8 , wherein said at least one circular ring is of a quantity of one, and said pulling string surrounds said ring slot of said mounting ring completely in one revolution. 
     
     
         11 . The positioning apparatus of a window shade as claimed in  claim 8 , wherein said at least one circular ring is of a quantity of multiple; said securing means and said corresponding mounting rings are arranged in left and right rows from top to bottom alternatively and are spaced apart from each other with a predetermined distance; said mounting rings are aligned with a virtual line from top to bottom; said pulling string passes by said circular rings and is alternatively wound from left to right to partially surround said ring slot of each one of said mounting rings to form a winding on said ring slot of each one of said mounting rings. 
     
     
         12 . The positioning apparatus of a window shade as claimed in  claim 8 , wherein said at least one mounting ring is secured on said at least one securing means to prohibit a rotation thereof. 
     
     
         13 . The positioning apparatus of a window shade as claimed in  claim 8 , wherein said at least one mounting ring is rotatably and pivotally attached to said at least one securing means. 
     
     
         14 . The positioning apparatus of a window shade as claimed in  claim 1 , wherein said body part comprises at least one circular ring having a surface indented to form a guiding slot thereon; said guiding slot is arranged at least partially along the circumference of said at least one circular ring; said pulling string passes through said guiding slot and at least partially surrounds said circumference of said at least one circular ring to form a winding thereon.