Foldable support, foldable chair and foldable table

Abstract

Disclosed are a foldable support, a foldable chair, and a foldable table. The foldable support includes a foldable triangular frame, and the triangular frame includes a first connecting block, a second connecting block, a third connecting block, a first connecting rod, a second connecting rod, and a third connecting rod. The second connecting block and the third connecting block are symmetrically arranged on one side of the first connecting block, the third connecting rod is provided with a first end and a second end, the first end of the third connecting rod is rotatably connected to the second connecting block, the second end of the third connecting rod is provided with a limiting elastic column and an unlocking button, and the third connecting block is provided with a connecting groove and a locking hole. The unlocking button is in linked connection with the limiting elastic column.

What is claimed is: 
     
         1 . A foldable support, comprising a foldable triangular frame, a lower support leg assembly that is detachably connected to the triangular frame, and an upper support rod assembly that is detachably connected to the triangular frame, wherein the triangular frame comprises a first connecting block, a second connecting block, a third connecting block, a first connecting rod, a second connecting rod, and a third connecting rod, wherein the second connecting block and the third connecting block are symmetrically arranged on one side of the first connecting block, one end of the first connecting rod and one end of the second connecting rod are rotatably connected to the first connecting block respectively, and the other ends of the first connecting rod and the second connecting rod are fixedly connected to the second connecting block and the third connecting block respectively;
 the third connecting rod is provided with a first end and a second end opposite to the first end, the first end of the third connecting rod is rotatably connected to the second connecting block, the second end of the third connecting rod is provided with a limiting elastic column and an unlocking button, the third connecting block is provided with a connecting groove, a locking hole is formed in a side wall of the connecting groove, and the second end of the third connecting rod enters the connecting groove and is snap-fitted into the locking hole by means of the limiting elastic column, thereby being tightly locked in the third connecting block; and   the unlocking button is in linked connection with the limiting elastic column, and the unlocking button is pressed to disengage the limiting elastic column from the locking hole, such that the second end of the third connecting rod is unlocked in the third connecting block, and in this case, the second end of the third connecting rod can be detached from the connecting groove, and the triangular frame is folded.   
     
     
         2 . The foldable support according to  claim 1 , wherein the unlocking button is arranged at a position of the second end of the third connecting rod that is offset from the third connecting block, such that when the second end of the third connecting rod enters the connecting groove, the unlocking button is located at a certain distance from an inner side of the third connecting block. 
     
     
         3 . The foldable support according to  claim 1 , wherein a spring plate is arranged inside the second end of the third connecting rod, one end of the unlocking button and one end of the limiting elastic column respectively extend into inside of the second end of the third connecting rod and abut against the spring plate, the other ends of the unlocking button and the limiting elastic column, under the action of an elastic force from the spring plate, are exposed outside the second end of the third connecting rod, and a peripheral wall of the second end of the third connecting rod is provided with a first hole for exposing the unlocking button and a second hole for exposing the limiting elastic column. 
     
     
         4 . The foldable support according to  claim 3 , wherein the spring plate is curved and comprises a first end arm and a second end arm that are arranged opposite to each other, the first end arm abuts against a side of the inside of the second end of the third connecting rod that is opposite to the first hole and the second hole, the second end arm abuts against a same side of the inside of the second end of the third connecting rod where the first hole and the second hole are located, and extending ends of the unlocking button and the limiting elastic column abut against the second end arm respectively. 
     
     
         5 . The foldable support according to  claim 4 , wherein a length of the second end arm is greater than that of the first end arm. 
     
     
         6 . The foldable support according to  claim 1 , wherein the unlocking button and the limiting elastic column are linearly spaced apart from each other at the second end of the third connecting rod, the unlocking button is arranged closer to an inner side of the second end of the third connecting rod, and the limiting elastic column is arranged closer to an outer side of the second end of the third connecting rod. 
     
     
         7 . The foldable support according to  claim 1 , wherein the locking hole is a through hole formed in an upper side wall of the connecting groove, and correspondingly, the unlocking button and the limiting elastic column are both arranged on an upper side of the second end of the third connecting rod. 
     
     
         8 . A foldable chair, comprising a flexible chair surface and a chair frame, wherein the chair frame is the foldable support according to  claim 1 , and the second connecting block and the third connecting block are symmetrically arranged in front of the first connecting block; the lower support leg assembly comprises two front support legs and two rear support legs, and the upper support rod assembly comprises two front support rods and two rear support rods, wherein the two front support legs are respectively inserted into lower ends of the second connecting block and the third connecting block, the two rear support legs are respectively inserted into both sides of a lower end of the first connecting block, the two front support rods are respectively inserted into upper ends of the second connecting block and the third connecting block, the two rear support rods are respectively inserted into both sides of an upper end of the first connecting block, and lengths of the two rear support rods are greater than those of the two front support rods; the flexible chair surface rises from front to back, two first plug-in sleeves are arranged on both sides of a front end of the flexible chair surface, and two second plug-in sleeves are arranged on both sides of a rear end of the flexible chair surface, wherein the two second plug-in sleeves are higher than the two first plug-in sleeves, upper ends of the two front support rods are respectively inserted into the two first plug-in sleeves, and upper ends of the two rear support rods are respectively inserted into the two second plug-in sleeves. 
     
     
         9 . A foldable chair, comprising a flexible chair surface and a chair frame, wherein the chair frame is the foldable support according to  claim 1 , and the second connecting block and the third connecting block are symmetrically arranged behind the first connecting block; the lower support leg assembly comprises two front support legs and two rear support legs, and the upper support rod assembly comprises two front support rods and two rear support rods, wherein the two front support legs are respectively inserted into both sides of a lower end of the first connecting block, the two rear support legs are respectively inserted into lower ends of the second connecting block and the third connecting block, the two front support rods are respectively inserted into both sides of an upper end of the first connecting block, the two rear support rods are respectively inserted into upper ends of the second connecting block and the third connecting block, and lengths of the two rear support rods are greater than those of the two front support rods; and the flexible chair surface rises from front to back, two first plug-in sleeves are arranged on both sides of a front end of the flexible chair surface, and two second plug-in sleeves are arranged on both sides of a rear end of the flexible chair surface, wherein the two second plug-in sleeves are higher than the two first plug-in sleeves, upper ends of the two front support rods are respectively inserted into the two first plug-in sleeves, and upper ends of the two rear support rods are respectively inserted into the two second plug-in sleeves. 
     
     
         10 . A foldable table, comprising a tabletop, two support beams, and a support frame, wherein the two support beams are arranged in parallel on both sides of a lower end of the tabletop from front to back to support the tabletop, and the support frame is the foldable support according to  claim 1 ; the second connecting block and the third connecting block are symmetrically arranged on a left or right side of the first connecting block; the lower support leg assembly comprises two first support legs that are respectively inserted into both sides of the lower end of the first connecting block and two second support legs that are respectively inserted into the lower ends of the second connecting block and the third connecting block; the upper support rod assembly comprises two first support rods that are respectively inserted into both sides of the upper end of the first connecting block and two second support rods that are respectively inserted into the upper ends of the second connecting block and the third connecting block, wherein a snap-fit piece is arranged at an upper end of each of the two first support rods and the two second support rods, and the two first support rods and the two second support rods are snap-fitted into corresponding end portions of the two support beams through their respective snap-fit pieces.