US Patent 7850021 Iron pipe furniture assembly structure

An iron pipe furniture assembly structure employs a pipe connector as a connection construction component for connecting a supporting shaft and a pipe element. The assembly utilizes an elongated round-shaped fastening shaft of the pipe connector for connecting the pipe element. The pipe element is connected to the fastening shaft via an insertion cork of the pipe element. Embedded ribs on the insertion cork engage embedded grooves on the fastening shaft to secure the pipe element to the pipe connector. A tool engages a groove in the pipe element to rotate the pipe element to cause the embedded ribs to engage and disengage with the embedded grooves.