Electric extension rotating mechanism

The utility model relates to an electric extending rotating mechanism which is composed of an air cylinder, a connecting piece I, a connecting piece II, a connecting piece III, a connecting piece IV, a motor, a gear and a handrail. The connecting piece I and the connecting piece II are respectively connected with the air cylinder; the connecting piece II and the connecting piece III are connected and can rotate relatively; the connecting piece III penetrates through the connecting piece IV and is connected with the handrail; the handrail is in transmission connection with the motor through a gear; the air cylinder can be connected with an external air source to push the connecting piece I to drive the connecting piece II and the connecting piece III to drive the handrail to extend and retract; when the motor rotates, the gear can drive the handrail to rotate along with the motor, and the rotation angle is adjustable. According to the electric extending rotating mechanism, the extending part is completed by st