Automatic umbrella

Abstract

An automatic umbrella comprises: a shaft (221), a handle, an upper runner (31, 131, 231), a lower runner (30, 130, 230), first ribs (13) having an inner end connected to the upper runner (31, 131, 231), second ribs (15) having two ends respectively connected to the lower runner (30, 130, 230) and one of the first ribs (13), and an automatic opening-closing device. The automatic opening-closing device comprises: an opening draw cord (24), a closing draw cord (45, 145, 245), a first reel (81) and a second reel (82) provided in an internal cavity of the handle, and a drive member (85). One end of the opening draw cord (24) is connected to the lower runner (30, 130, 230), and the opening draw cord (24) passes around a top portion of the shaft (221) to enter an internal cavity of the shaft (221). The other end of the opening draw cord (24) is connected to the first reel (81). The closing draw cord (45, 145, 245) has one end connected to the second reel (82) and the other end led outward and passing through an upper side wall of the shaft (221) to be connected to one of the first ribs (13). The drive member (85) provides a rotational force to both or a selected one of the first reel (81) and the second reel (82). The automatic umbrella has a simple structure, significantly reduces the torque requirement of the drive member (85), and lowers power consumption, thus reducing costs and enabling convenient and safe use.

1 . An automatic umbrella, comprising: a middle rod, a handle fixed at the bottom of the middle rod, an upper nest fixed on the top of the middle rod, and a lower nest with its sliding sleeve connected to the outside middle rod, first ribs with their inner ends connected to the upper nest, and second ribs with their two ends respectively connected to lower nest and the first ribs, and an automatic opening/closing device, characterized in that:
 the automatic opening/closing device comprises: opening drawstrings, closing drawstrings, the first and the second reels and a driving element mounted in the inner cavity of the handle; one end of an opening drawstring is connected to the lower nest and enters the inner cavity of the middle rod after being wound to the top of the middle rod, and the other end is connected to the first reel; one end of a closing drawstring is connected to the second reel, and the other end is connected to the first rib after coming out of the upper side wall of the middle rod; the driving element simultaneously or alternatively provides rotational force to the first reel and the second one.   
     
     
         2 . The automatic umbrella according to  claim 1 , characterized in that: the middle rod is a single pipe, and the opening drawstring is a single drawstring. 
     
     
         3 . The automatic umbrella according to  claim 1 , characterized in that: The middle rod comprises two pipes which are sleeved inside and outside by an upper one and a lower one according to their diameters; the automatic opening/closing device also comprises a moving part set in inner cavity of the lower pipe and a push rod disposed between the moving part and the upper pipe, and the opening drawstrings consist of two drawstrings, the first and the second; one end of the first opening drawstring is connected to the lower nest, and the other end enters the inner cavity of the middle rod and is connected to the lower pipe after being wound to the top of the middle rod; one end of the second opening drawstring is connected to the first reel, and the other end is connected to the moving part after being wound to the top of the lower pipe. 
     
     
         4 . The automatic umbrella according to  claim 1 , characterized in that: the middle rod comprises several pipes which are sleeved inside and outside by an upper pipe, one or more middle pipes and a lower one according to their diameters; the automatic opening/closing device also comprises a moving part set in inner cavity of the lower pipe and a push rod disposed between the moving part and the upper adjacent middle pipe of the lower one, and the opening drawstrings consist of the first opening drawstring, the second opening drawstring and one or more third opening drawstrings of the same number as the middle pipes; one end of the first opening drawstring is connected to the lower nest, and the other end enters the inner cavity of the middle rod and is connected to the lower adjacent pipe of the upper one after being wound to the top of the middle rod; one end of the second opening drawstring is connected to the first reel, and the other end is connected to the moving part after being wound to the top of the lower pipe; one end of a third opening drawstring is connected to the lower end of the upper adjacent pipe of a certain middle pipe, and the other end enters the inner cavity of the middle rod and is connected to the lower adjacent pipe of the middle pipe after being wound to the top of the middle pipe. 
     
     
         5 . The automatic umbrella according to  claim 4 , characterized in that: the top of the middle pipe is fixedly provided with a middle pipe top plug which is equipped with a middle pipe pulley and a through-hole through which the drawstring can pass, and the third opening drawstring passes the middle pipe pulley when passing the top of the middle pipe; the top of the lower pipe is fixedly provided with a lower pipe top plug which is equipped with a lower pipe pulley and a through-hole through which the drawstring can pass, the moving part is provided with a moving part pulley, and the upper end of the second opening drawstring is fixed to the top of the lower pipe after being wound to the lower pipe pulley and the moving part pulley. 
     
     
         6 . The automatic umbrella according to  claim 1 , characterized in that: the top of the middle rod is provided with an upper nest pulley, and the opening drawstrings are wound to the upper nest pulley when passing the top of the middle rod. 
     
     
         7 . The automatic umbrella according to  claim 1 , characterized in that: the upper closing drawstring consists of more than two branches which are respectively connected to more than two first ribs. 
     
     
         8 . The automatic umbrella according to  claim 1 , characterized in that: in addition to the first ribs connected to the closing drawstrings, one or more of other first ribs are provided with closing springs that provide power when the umbrella is being closed. 
     
     
         9 . The automatic umbrella according to  claim 1 , characterized in that: when the driving element is activated, the first and the second reels are rolled in the opposite direction, or when the driving element activates one of the first and the second reels, the other one is freely rotated and scrolled toward the opposite direction. 
     
     
         10 . The automatic umbrella according to  claim 9 , characterized in that: the first and the second reels correspond to the circles with various perimeters based on the rolling or loosening lengths of the opening drawstrings and the closing ones. 
     
     
         11 . The automatic umbrella according to  claim 3 , characterized in that: the push rod, formed by a bar-shaped structure with open ends or a two-rod-shaped structure, extends upward from the upper end of the moving part through the top of the lower pipe and is fixed at the top of the upper adjacent pipe of the lower pipe. 
     
     
         12 . The automatic umbrella according to  claim 1 , characterized in that: the driving element is driven by a motor or the magnetic force.