Frame for shading product and beach umbrella

Abstract

A frame for a shading product and a beach umbrella is provided. The frame for a shading product includes a central rod, a plurality of top frame units, a first slider arranged on the central rod and an extension rod. Each top frame unit includes a first top rod rotatably connected to the central rod and a second top rod. Each second top rod is rotatably connected to the first slider, and the first top rods, the second top rods, the central rod and the first slider form crank-slider mechanisms. The extension rod is pivotally connected to one top frame unit to allow the extension rod to flip upwards relative to the top frame unit when the frame for a shading product overturns on its side to the ground.

1 . A frame for a shading product, comprising:
 a central rod having an upper end portion and a lower end portion for supporting or fixing on the ground, the lower end portion being located below the upper end portion;   a plurality of top frame units supported by the central rod and capable of unfolding and folding, each top frame unit comprising a first top rod and a second top rod, and an inner end portion of each first top rod being rotatably connected to the upper end portion of the central rod;   a first slider arranged on the central rod and capable of moving in an up-down direction, the first slider being spaced apart from the upper end portion of the central rod, an inner end portion of each second top rod being rotatably connected to the first slider, and the first top rod being rotatably connected to the second top rod; and   an extension rod with an inner end portion being pivotally connected to one of the top frame units to allow the extension rod to flip upwards relative to the one top frame unit when the frame overturns on its side to the ground.   
     
     
         2 . The frame as in  claim 1 , further comprising a joint, wherein the joint is arranged on an outer end portion of one first top rod, an outer end portion of one second top rod is rotatably connected to the joint, and an inner end portion of the extension rod is rotatably connected to the joint and configured to only allow the extension rod to flip upwards relative to the one top frame unit when the frame overturns on its side to the ground. 
     
     
         3 . The frame as in  claim 2 , wherein the joint has an accommodating groove, and when the frame is in an unfolded state, the outer end portion of the extension rod is accommodated in the accommodating groove, and the accommodating groove has an open upper portion to allow the extension rod to flip upwards. 
     
     
         4 . The frame as in  claim 2 , wherein when the frame is in the unfolded state, centerlines of the extension rod and the one first top rod coincide or are parallel to each other, the extension rod is connected to the joint via a first pivot, and the first pivot is located above the centerline of the extension rod. 
     
     
         5 . The frame as in  claim 4 , wherein the one second top rod is connected to the joint via a second pivot, and the second pivot is located below the centerline of the extension rod. 
     
     
         6 . The frame as in  claim 5 , wherein the joint comprises a body and a metal reinforcement sheet fixedly connected to the body, and the metal reinforcement sheet is provided with pivot holes for the first pivot and the second pivot to pass through, respectively. 
     
     
         7 . The frame as in  claim 2 , wherein when the frame is in a folded state, the joint and the central rod are close to each other, the first slider and the upper end portion of the central rod are close to each other, and the inner end portions of the second top rods and the inner end portions of the first top rods are close to each other. 
     
     
         8 . The frame as in  claim 7 , wherein a length of the first top rods is smaller than a length of the second top rods; the central rod comprises a plurality of sub rods that can be relatively retracted or detached, and the central rod further comprises a ground nail arranged on a lowermost sub rod. 
     
     
         9 . The frame as in  claim 1 , wherein a spring is arranged between the upper end portion of the central rod and the first slider. 
     
     
         10 . The frame as in  claim 1 , wherein each top frame unit further comprises a slant support rod, and an upper end portion of the slant support rod is rotatably connected to the first or second top rod; the frame further comprises a second slider, the second slider is arranged on the central rod and capable of moving in an up-down direction, and is located below the first slider, and a lower end portion of each slant support rod is rotatably connected to the second slider; each top frame unit is connected with one extension rod. 
     
     
         11 . The frame as in  claim 10 , wherein when the frame is in the unfolded state, the first slider and the second slider are locked to each other; when the frame is in the folded state, the first slider and the second slider are detached from each other; one of the first slider and the second slider is provided with a locking member that can deform elastically and the other one is provided with a locking groove, when the frame is in the unfolded state, the locking member is inserted into the locking groove, and the locking member has a lug that matches with a groove wall of the locking groove. 
     
     
         12 . The frame as in  claim 10 , wherein each top frame unit comprises two second top rods arranged in parallel, and the slant support rod passes between the two second top rods; or each top frame unit comprises two first top rods arranged in parallel. 
     
     
         13 . A beach umbrella comprising an umbrella frame and a cloth cover, the umbrella frame including the frame as in  claim 1 .