Single folding sofa bedstead

A single folding sofa bedstead, comprising:

• a bedstead frame body;
• a frame assembly, having a first frame, a second frame, and a third frame, wherein the first frame is pivotally connected to a first side of the second frame, and a first side of the third frame is pivotally connected to a second side of the second frame;
• when the first frame, the second frame, and the third frame are folded on the bedstead frame body, the third frame and the second frame are in a bent state, the third frame is located above the second frame, and the first frame is in a vertical state and is located on a second side of the third frame and the first side of the second frame;
• a first connecting rod assembly, wherein a first end of the first connecting rod assembly is pivotally connected to the first frame, and a second end of the first connecting rod assembly is pivotally connected to the bedstead frame body;
• a second connecting rod assembly, wherein a first end of the second connecting rod assembly is pivotally connected to the second frame, and a second end of the second connecting rod assembly is pivotally connected to the bedstead frame body;
• a first linkage rod group, wherein a first end of the first linkage rod group is pivotally connected to the first connecting rod assembly, and a second end of the first linkage rod group is pivotally connected to the second connecting rod assembly;
• and
• a second linkage rod group, wherein a first end of the second linkage rod group is pivotally connected to the third frame, and a second end of the second linkage rod group is pivotally connected to the first end of the second connecting rod assembly;
• wherein the second side of the third frame is rotatably unfolded around a pivot point between the third frame and the second frame when the third frame is unfolded outwards from the bedstead frame body, the third frame drives the second frame to be unfolded through the second linkage rod group and the second connecting rod assembly, the second connecting rod assembly drives the first frame to be unfolded through the first linkage rod group and the first connecting rod assembly, and after the first frame, the second frame, and the third frame are completely unfolded, the first frame, the second frame, and the third frame form an overall bedstead;
• wherein the first connecting rod assembly comprises two first connecting rods and two second connecting rods, wherein the two first connecting rods are symmetrical on both sides of the bedstead frame body, the two second connecting rods are symmetrical on both sides of the bedstead frame body, a first end of each of the two first connecting rods is pivotally connected to the bedstead frame body, a second end of each of the two first connecting rods is pivotally connected to a first end of each of the two second connecting rods, a second end of each of the two second connecting rods is pivotally connected to the first frame, and the first frame is folded and unfolded on the bedstead frame body through rotation of the two first connecting rods and the two second connecting rods.