Beach chair frame

Abstract

A beach chair frame, including two folding assemblies on a left side and on a right side of the beach chair, and two sets of first cross tubes on a front side and on a rear side of the beach chair; each folding assembly has a set of second cross tubes, a backrest tube, an armrest tube, a support tube, a first sliding seat, a second sliding seat, foot seats and a first pivot seat. The beach chair does not affect the original folding function after addition of the armrest tubes. When using the beach chair, users can be supported on the armrest tubes when standing up, thus being supported by the beach chair.

What is claimed is: 
     
         1 . A beach chair frame, comprising:
 two symmetrically arranged folding assemblies on a left side and on a right side of the beach chair frame, and two sets of first cross tubes arranged between the folding assemblies on a front side and on a rear side of the beach chair frame respectively; each of the folding assemblies comprises a set of second cross tubes, a backrest tube, an armrest tube, a support tube, a first sliding seat, a second sliding seat, foot seats and a first pivot seat;   a lower end of the backrest tube is pivotally connected to the first sliding seat; the first sliding seat is slidably mounted on a rear lower part of said set of second cross tubes; the second sliding seat is slidably mounted on the backrest tube;   a rear end of the armrest tube is rotatably installed on one side of the backrest tube;   a lower end of the support tube is slidably and pivotally connected to a front lower part of the set of second cross tubes, an upper end of the support tube is pivotally connected to a front part of the armrest tube, and a middle part of the support tube is cross-connected with a front upper part of the set of second cross tubes;   each of two lower ends of each of the two sets of first cross tubes is pivotally connected to a respective lower end of a respective set of second cross tubes through a respective foot seat; each of two upper ends of the set of first cross tubes arranged on the front side of the beach chair frame and a respective front upper part of a respective set of second cross tubes are both pivotally connected to a respective first pivot seat; each of two upper ends of the set of first cross tubes arranged on the rear side of the beach chair frame and a respective rear upper part of a respective set of second cross tubes are both pivotally connected to a respective second sliding seat.   
     
     
         2 . The beach chair frame of  claim 1 , wherein a pivot shaft at the rear end of the armrest tube passes through the backrest tube. 
     
     
         3 . The beach chair frame of  claim 1 , wherein a fourth sliding seat is fixedly mounted on the backrest tube below the second sliding seat, and the rear end of the armrest tube is slidably connected to the fourth sliding seat. 
     
     
         4 . The beach chair frame of  claim 1 , wherein the second sliding seat is provided with a through hole for the backrest tube to pass through, and a rear wall of the through hole is an inclined surface. 
     
     
         5 . The beach chair frame of  claim 1 , wherein a third sliding seat is slidably mounted on the front lower part of the set of second cross tubes, and the lower end of the support tube is pivotally connected to the third sliding seat. 
     
     
         6 . The beach chair frame of  claim 1 , wherein the front part of the armrest tube is provided with a pivoting part which the upper end of the support tube is pivotally connected to. 
     
     
         7 . The beach chair frame of  claim 6 , wherein the pivoting part is provided with sliding grooves along the front side towards the rear side of the beach chair frame, and ends of a pivot shaft of the upper end of the support tube slidably fits into the sliding grooves. 
     
     
         8 . The beach chair frame of  claim 1 , wherein the rear end of the armrest tube is located below the second sliding seat. 
     
     
         9 . The beach chair frame of  claim 1 , further comprising a set of third cross tubes; each of two lower ends of the set of third cross tubes is pivotally connected to a respective foot seat, and two upper ends of the set of third cross tubes configured to support one end of a chair fabric of a beach chair are located above the two lower ends thereof. 
     
     
         10 . The beach chair frame of  claim 1 , wherein each of the folding assemblies further comprises a swinging bent tube and a second pivot seat; the second pivot seat is pivotally connected to one of the foot seats at the front of the folding assembly; the swinging bent tube is mounted below the folding assembly, a front end of the swinging bent tube is inserted into the second pivot seat, and a rear end of the swinging bent tube passes through another one of the foot seats at the rear of the folding assembly.