Umbrella frame

Abstract

An umbrella frame has a lower runner, a main shaft, an upper runner, and a plurality of stretching frames. Each stretching frame has a stretcher, a connection plate, an elastic rod, a connector, a distal rod, a long rib, and a short rib. The connection plate has a first end protrusion and a second end proton. The connector has an end notch, an end hole, and a lower protruded block having a circular hole. The long rib has an end protruded block inserted in the circular hole, an inner protruded bar having a first through aperture, and an outer protruded bar having a second through aperture. The elastic rod is inserted through a spacing defined by the upper pressing bar and the long rib The short rib has a distal protruded block, an upper protruded bar having a round aperture, and a lower lobe having a circular aperture. The elastic rod has two end hooks. The elastic rod is hooked in the end notch and the round aperture. The distal protruded block is inserted in the first through aperture. The second end protrusion is inserted in the second through aperture. The distal protrusion is inserted in the circular aperture.

1 . An umbrella frame comprising: 
 a lower runner, a main shaft inserted through the lower runner, an upper runner disposed on a top end of the main shaft, and a plurality of stretching frames,    each of the stretching frames having a stretcher, a connection plate, an elastic rod, a connector, a distal rod, a long rib, and a short rib,    the stretcher connected to the lower runner,    the short rib connected to the upper runner,    the stretcher having a distal protrusion and a downward lobe having a round hole,    the connection plate having a first end protrusion and a second end protrusion,    the connector having an end notch, an end hole to receive the distal rod, and a lower protruded block having a circular hole,    the long rib having an end protruded block inserted in the circular hole pivotally, an upper pressing bar, an inner protruded bar having a first through aperture, and an outer protruded bar having a second through aperture,    the elastic rod inserted through a spacing defined by the upper pressing bar and the long rib,    the short rib having a distal protruded block, an upper protruded bar having a round aperture, and a lower lobe 0  having a circular aperture,    the elastic rod having two end hooks,    the elastic rod hooked in the end notch of the connector and the round aperture of the upper protruded bar,    the distal protruded block inserted in the first through aperture of the inner protruded bar pivotally,    the second end protrusion inserted in the second through aperture of the outer protruded bar pivotally,    the first end protrusion inserted in the round hole of the downward lobe pivotally and    the distal protrusion inserted in the circular aperture of the lower lobe pivotally.    
   
   
       2 . The umbrella frames as claimed in  claim 1 , wherein the elastic rod is made of a metal, and the stretch, the connection plate, the connector, the distal rod, the long rib and the short rib are made of plastics.