Robotic arm and self-moving cleaning apparatus

A self-moving cleaning device, comprising a robotic arm, where the robotic arm comprises:

• a support arm, a connecting arm, a working arm and two first robotic joints, wherein a first end of the connecting arm is connected to the support arm by one of the first robotic joints, so that the connecting arm is foldable or unfoldable relative to the support arm;
• a second end of the connecting arm is connected to the working arm by the other first robotic joint, so that the working arm is foldable or unfoldable relative to the connecting and,
• wherein bent structures are arranged at two ends of the connecting arm respectively, and the two bent structures are engaged in a convex-concave shape fit with the support arm and the working arm respectively when the connecting arm is in a folded state relative to both the support arm and the working arm.