Ferrule for illuminating umbrella

Abstract

A ferrule for umbrella is made of a light-transmissible material and defines an internal space for accommodating a light-emitting element mounted on a top of the umbrella. The ferrule is fixedly connected to a top of a shaft or an upper hub of the umbrella and is characterized in that at least a part of outer and inner surfaces of the ferrule is provided with a plurality of protrusions. The protrusions function like lens to diffract and scatter light emitted from the light-emitting element to create an enhanced illuminating effect, enabling the umbrella to have a bright illuminating source that provides good visually warning effect.

What is claimed is:  
     
         1 . A ferrule being fixedly connected to a top of an umbrella to enclose a light-emitting element mounted on the top of the umbrella, comprising a body made of a light-transmissible material and defining an internal space for receiving said light-emitting element therein, and a plurality of protrusions provided on at least a part of outer and inner surfaces of said body.  
     
     
         2 . The ferrule for umbrella as claimed in  claim 1 , wherein said protrusions are provided on an inner surface of said body of said ferrule.  
     
     
         3 . The ferrule for umbrella as claimed in  claim 1 , wherein said protrusions are provided on an outer surface of said body of said ferrule.  
     
     
         4 . The ferrule for umbrella as claimed in  claim 1 , wherein said protrusions are formed along spiral grooves that are spirally provided on said body of said ferrule.  
     
     
         5 . The ferrule for umbrella as claimed in  claim 4 , wherein said spiral grooves are formed by providing a pattern including right-handed and left-handed spiral lines on said body of said ferrule.  
     
     
         6 . The ferrule for umbrella as claimed in  claim 1 , wherein said protrusions are a plurality of axially extended and curve-sectioned raised strips.  
     
     
         7 . The ferrule for umbrella as claimed in  claim 1 , wherein said protrusions are a plurality of circumferentially extended and curve-sectioned raised strips.  
     
     
         8 . The ferrule for umbrella as claimed in  claim 1 , wherein said protrusions form convex lens on the outer surface of said body of said ferrule.  
     
     
         9 . The ferrule for umbrella as claimed in  claim 1 , wherein said protrusions are formed by providing concave pits on the outer surface of said body of said ferrule.