Abstract: A concentric joint mechanism includes a frame, a flexible spherical body, a first friction wheel, a first power device, and a fixing device. The flexible spherical body is disposed inside the frame. The first friction wheel is disposed inside the frame and abuts against the flexible spherical body for driving the flexible spherical body to rotate in a first direction. The first power device is connected to the first friction wheel for providing power to the first friction wheel. The fixing device is connected to the frame and abuts against the flexible spherical body for fixing the flexible spherical body inside the frame together with the first friction wheel.

Abstract: A concentric joint mechanism includes a frame, a flexible spherical body, a first friction wheel, a first power device, and a fixing device. The flexible spherical body is disposed inside the frame. The first friction wheel is disposed inside the frame and abuts against the flexible spherical body for driving the flexible spherical body to rotate in a first direction. The first power device is connected to the first friction wheel for providing power to the first friction wheel. The fixing device is connected to the frame and abuts against the flexible spherical body for fixing the flexible spherical body inside the frame together with the first friction wheel.

Abstract: A robot-like electronic device changeable from a cubical or box profile to a robot profile includes a first body, two second bodies and a third body. The two second bodies are hinged to two sides of the first body through a swiveling beam. The third body is pivotally coupled on the bottom side of the first body. The first, second and third bodies can swivel relative to one another. The two second bodies and the third body can be coupled with the first body, to become a cubic or box. The two second bodies also may be swiveled outwards, like two arms of a robot. The third body can be swiveled 90 degrees relative to the first body and bent forwards like a foot, so that the first body can stand upright on a flat surface like a robot.

Abstract: A robot-like electronic device changeable from a cubical or box profile to a robot profile includes a first body, two second bodies and a third body. The two second bodies are hinged to two sides of the first body through a swiveling beam. The third body is pivotally coupled on the bottom side of the first body. The first, second and third bodies can swivel relative to one another. The two second bodies and the third body can be coupled with the first body, to become a cubic or box. The two second bodies also may be swiveled outwards, like two arms of a robot. The third body can be swiveled 90 degrees relative to the first body and bent forwards like a foot, so that the first body can stand upright on a flat surface like a robot.