Two-folded automatic opened umbrella

Abstract

The present invention relates to a two-folded automatic opened umbrella, which includes a shaft having an upper tube and a lower tube. An upper joint is provided on the top of the shaft and a middle joint is provided around the upper tube while a runner is provided around the shaft below the middle joint. An upper spring and a lower spring are put in the upper tube to provide the force for opening the umbrella. An extended rib is positioned within a triangle composed by the shaft, a main rib, and an upper branch rib to assist the umbrella being closed smoothly and being small occupation as closed. This obtains improvement and utility.

What is claimed is:  
     
         1 . A two-folded automatic opened umbrella including a shaft having an upper tube and a lower tube while an upper spring and a lower spring provided in the upper tube and an upper joint covered on the top of the upper spring; a middle joint being provided around the upper tube and a runner being provided around the shaft below the middle joint; the inner end of a main rib being pivotally connected with the runner and the inner end of an upper branch rib being connected with the upper joint while the outer end of the branch rib is pivotally connected with the main rib at a middle portion, and the extended rib having the inner end connected with the middle joint and the outer end connected with the branch rib at a outer portion. the extended rib positioned within the triangle composed by the shaft ( 1 ), the main rib ( 31 ), and the branch rib ( 32 ).  
     
     
         2 . The two-folded automatic opened umbrella as claimed in  claim 1 , wherein the extended rib being positioned within the triangle composed by the shaft, the main rib, and the branch rib.  
     
     
         3 . The two-folded automatic opened umbrella as claimed in  claim 1 , wherein the outer end of the extended rib being connected with the branch rib at the position where connecting with the main rib or a flexible rib of the umbrella.