Folding joint

A folding joint, comprising:

• a first joint,
• a second joint,
• a handle,
• a locking rod,
• a swing back element,
• a connecting rod,
• a sliding rod, and
• a reset elastic member,
• one side of the first joint is hingedly connected to one side of the second joint, and the handle is hingedly connected to other side of the first joint, the other side of the second joint is provided with a supporting part, and
• the handle is also provided with a sliding groove,
• one end of the swing back element is hingedly connected to the other side of the first joint, and
• the locking rod is arranged at the other end of the swing back element,
• the sliding rod is arranged in the sliding groove of the handle, and
• the connecting rod is arranged between the locking rod and the sliding rod, and
• one end of connecting rod is fixedly connected with the locking rod, and the other end is fixedly connected with the sliding rod,
• the reset elastic member is configured to rotate the locking rod at the other end of the swing back element toward the supporting part on the second joint, wherein
• in response to turning the handle, the sliding rod slides to one end of the sliding groove and tightens the locking rod on the supporting part through the connecting rod.