Cantilever umbrella

Abstract

A cantilever umbrella has a pole, an umbrella body, and a cantilever assembly connected between the pole and the umbrella body. The cantilever assembly has a slider, a lower arm, an upper arm, and a strut. The slider is slidably mounted and is lockable on the pole. The lower arm is connected between the slider and a top of the umbrella body, and the upper arm is connected between a top end of the pole and a bottom of the umbrella body, being pivotally connected to the lower arm. The strut is connected between the pole and the upper arm, configured to be compressed when the umbrella body is closed, and configured to exert a force on and push the upper arm to actuate the lower arm when the umbrella body is being opened.

What is claimed is: 
     
         1 . A cantilever umbrella comprising:
 a pole;   an umbrella body; and   a cantilever assembly connected between the pole and the umbrella body and having
 a slider mounted on the pole and configured to be locked on the pole and be unlocked to slide along the pole; 
 a lower arm having two ends pivotally connected to the slider and a top of the umbrella body, respectively; 
 an upper arm having
 two ends pivotally connected to a top end of the pole and a bottom of the umbrella body, respectively; and 
 a middle section pivotally connected to a middle section of the lower arm; and 
 
 a strut having two ends respectively pivotally connected to the pole and the upper arm such that the strut is compressed when the umbrella body is closed and drives the upper arm to swing the lower arm when the umbrella body is being opened. 
   
     
     
         2 . The cantilever umbrella as claimed in  claim 1 , wherein
 the umbrella body has a shaft, a notch, a runner, and a rib component;   the notch is fixed on a top of the shaft and connected with the lower arm;   the upper arm is pivotally connected to the runner;   the rib component is connected between the notch and the runner; and   the runner is configured to move relative to the shaft for opening or closing the rib component.   
     
     
         3 . The cantilever umbrella as claimed in  claim 2 , wherein
 the rib component has
 multiple upper ribs pivotally connected to the notch; and 
 multiple lower ribs, each one of the multiple lower ribs pivotally connected to a respective one of the multiple upper ribs; 
   the multiple upper ribs and the lower arm surround the shaft at equiangular intervals; and   the multiple lower ribs and the upper arm are pivotally connected to the runner at equiangular intervals.   
     
     
         4 . The cantilever umbrella as claimed in  claim 2 , wherein
 the notch has a tube portion sheathed onto the shaft;   the umbrella body has a connector sheathed onto the tube portion to position the tube portion on the shaft; and   the lower arm is pivotally connected to the connector.   
     
     
         5 . The cantilever umbrella as claimed in  claim 2 , wherein the runner is configured to move relative to the shaft to depart from or be connected with the shaft. 
     
     
         6 . The cantilever umbrella as claimed in  claim 3 , wherein the runner is configured to move relative to the shaft to depart from or be connected with the shaft. 
     
     
         7 . The cantilever umbrella as claimed in  claim 4 , wherein the runner is configured to move relative to the shaft to depart from or be connected with the shaft. 
     
     
         8 . The cantilever umbrella as claimed in  claim 5 , wherein
 the umbrella body has a post and a guiding hole respectively disposed on the shaft and the runner along an axial direction of the umbrella body; and   the post has a conical structure configured for guiding the post to be inserted into the guiding hole such that the shaft and the runner are coaxially connected with each other.   
     
     
         9 . The cantilever umbrella as claimed in  claim 6 , wherein
 the umbrella body has a post and a guiding hole respectively disposed on the shaft and the runner along an axial direction of the umbrella body; and   the post has a conical structure configured for guiding the post to be inserted into the guiding hole such that the shaft and the runner are coaxially connected with each other.   
     
     
         10 . The cantilever umbrella as claimed in  claim 7 , wherein
 the umbrella body has a post and a guiding hole respectively disposed on the shaft and the runner along an axial direction of the umbrella body; and   the post has a conical structure configured for guiding the post to be inserted into the guiding hole such that the shaft and the runner are coaxially connected with each other.   
     
     
         11 . The cantilever umbrella as claimed in  claim 8 , wherein the umbrella body has
 a groove located at an end of the guiding hole and having
 an opening communicating with the guiding hole and having a diameter larger than a diameter of the guiding hole. 
   
     
     
         12 . The cantilever umbrella as claimed in  claim 9 , wherein the umbrella body has
 a groove located at an end of the guiding hole and having
 an opening communicating with the guiding hole and having a diameter larger than a diameter of the guiding hole. 
   
     
     
         13 . The cantilever umbrella as claimed in  claim 10 , wherein the umbrella body has
 a groove located at an end of the guiding hole and having
 an opening communicating with the guiding hole and having a diameter larger than a diameter of the guiding hole. 
   
     
     
         14 . The cantilever umbrella as claimed in  claim 1 , wherein
 the cantilever umbrella has a base; and   the pole is disposed on the base.   
     
     
         15 . The cantilever umbrella as claimed in  claim 2 , wherein
 the cantilever umbrella has a base; and   the pole is disposed on the base.   
     
     
         16 . The cantilever umbrella as claimed in  claim 3 , wherein
 the cantilever umbrella has a base; and   the pole is disposed on the base.   
     
     
         17 . The cantilever umbrella as claimed in  claim 4 , wherein
 the cantilever umbrella has a base; and   the pole is disposed on the base.