Patent Publication Number: US-2005126612-A1

Title: Adjustable fixture for an umbrella

Description:
FIELD OF THE INVENTION  
      This invention relates to an adjustable fixture for an umbrella, and more particularly to an adjustable fixture to control the umbrella to extend or retract in length in an easy and safe manner.  
     BACKGROUND OF THE INVENTION  
      A conventional umbrella with a length adjustable fixture uses a cam to control the extension and retraction of the umbrella. However, when in a loose status, the sliding of the umbrella still engages with the cam. This deteriorates the material gradually and eventually is going to loose its function.  
      In view of this, the inventor has derived the present invention to improve the shortcomings  
     SUMMARY OF THE INVENTION  
      It is the primary object of the present invention to provide an adjustable fixture for an umbrella, which eliminates the friction when in a released status.  
      It is another object of the present invention to provide an adjustable fixture for an umbrella, which is easy to operate.  
      It is a further object of the present invention to provide an adjustable fixture for an umbrella, which can last longer and is cost effectiveness. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a perspective view of the present invention;  
       FIG. 2  is a cross-sectional view of the present invention; and  
       FIG. 3  is a cross-sectional view depicting the present invention in a released status.  
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
      An adjustable fixture for an umbrella of the present invention comprises a sleeve  1 , a cam handle  2 , and a block  3  incorporated with an outer rod  4  and an inner rod  5  of the umbrella.  
      The outer rod  4 , as shown in  FIG. 1 , is inserted within the sleeve  1  while the inner rod  5  is inserted within the outer rod  4  in a slidable manner. The sleeve  1  has a connecting wall  11  bossing out from one side thereof and holes  12  on the same side exposing from the connecting wall  11 . The cam handle  2  has a cam  21  at one end. The cam  21  is pivotally connected to connecting wall  1   1  of the sleeve  1  by a pin  22 . The block  3  is located between the cam  21  of the cam handle  2  and the holes  12  of the sleeve  1 . Springs  31  are located between the block  3  and the outer rod  4 . The block  3  is urged by the springs  31  towards the cam  21  of the cam handle  2 .  
      When pushing down the cam handle  2 , as shown in  FIG. 2 , the cam  21  urges the block  3  to tighten the inner rod  5  and to restrict the inner rod  5  from sliding within the outer rod  4 . On the contrary, when the cam handle  2  is lifted upward, the locking situation is released, the springs  31  urge the block  3  towards the cam  21 , thus the inner rod  5  is free to move within the outer rod  4 .