Umbrella

Abstract

An umbrella includes a shank, a plurality of main ribs connected pivotally to the shank, a plurality of auxiliary ribs connected pivotally to the shank, a plurality of elastic members connected to the main ribs and the auxiliary ribs, a slide unit connected slidably to the shank, a plurality of spreaders connected pivotally to the main ribs and the slide unit, a first canopy connected to the main ribs and having a top edge cooperating with the main ribs to define a plurality of openings, and a second canopy connected to the auxiliary ribs and covering removably the openings.

1 . An umbrella comprising:
 a shank;   a plurality of angularly spaced-apart ma in ribs, each having a first pivot end that is connected pivotally to an upper portion of said shank;   a plurality of angularly spaced-apart auxiliary ribs, each having a second pivot end that is connected pivotally to said upper portion of said shank;   a plurality of elastic members, each having opposite first and second ends that are connected respectively to a respective one of said main ribs and a respective one of said auxiliary ribs;   a slide unit connected slidably to said shank;   a plurality of angularly spaced-apart spreaders, each having an end connected pivotally to a respective one of said main ribs, and an opposite end connected pivotally to said slide unit, so that said main ribs and said auxiliary ribs are driven to pivot relative to said shank through said spreaders when said slide unit slides along said shank; and   a canopy unit including
 a first canopy that is connected to said main ribs, and that has a top edge cooperating with said main ribs to define a plurality of openings, and 
 a second canopy that is connected to s aid auxiliary ribs, and that covers removably said openings. 
   
     
     
         2 . The umbrella as claimed in  claim 1 , wherein said second pivot ends of said auxiliary ribs are located higher than said first pivot ends of said main ribs. 
     
     
         3 . The umbrella as claimed in  claim 2 , further comprising a plurality of limit members, each connected between a respective one of said main ribs and the corresponding one of said auxiliary ribs for limiting pivoting movement of the corresponding one of said auxiliary ribs relative to the respective one of said main ribs. 
     
     
         4 . The umbrella as claimed in  claim 3 , wherein:
 said slide unit includes a slide sleeve mounted slidably on said shank, a connecting ring surrounding said shank and disposed over said slide sleeve, and a resilient member sleeved on said shank and interconnecting said slide sleeve and said connecting ring; and   said umbrella further comprising a plurality of angularly spaced-apart support rods, each having opposite ends connected respectively and pivotally to said slide sleeve and a respective one of said spreaders.