Umbrella frame

Abstract

An umbrella frame having multiple stretching frames each composed of a long rib, a short rib, a stretcher, a connection plate, an elastic rod, a connector and a distal rod all made of plastic, wherein the improvement of the umbrella frame is that engaging parts such as blocks and protrusions on the elements are all made of plastic material and integrally formed with the elements respectively. Thus, joints of the umbrella frame have no erosion concerns in use.

1 . An umbrella frame having multiple stretching frames each composed of a long rib, a short rib, a stretcher, a connection plate, an elastic rod, a connector and a distal rod all made of plastic, wherein an improvement of the umbrella frame is that: 
 the long rib has an end protruded block made of plastic material for combination and integrally formed on the long rib by injection extrusion.    
   
   
       2 . The umbrella frame as claimed in  claim 1 , wherein an improvement of the umbrella frame is that: 
 the short rib has a distal protruded block made of plastic material for combination and integrally formed with the short rib by injection extrusion.    
   
   
       3 . The umbrella frame as claimed in  claim 1 , wherein an improvement of the umbrella frame is that: 
 the stretcher has a distal protrusion made of plastic material for combination and integrally formed with the stretcher by injection extrusion.    
   
   
       4 . The umbrella frame as claimed in  claim 1 , wherein an improvement of the umbrella frame is that: 
 the connecting plate has an end protrusion made of plastic material for combination and integrally formed with the connecting place by injunction extrusion.