Instantaneous direction changing rotation mechanism

A direction changing rotation mechanism comprising:

• a rotation means comprising a driving shaft and a driven shaft with coincident central lines and a casing of gear between the driving shaft and driven shaft for transmission of power from the driving shaft via the casing of gear to drive the driven shaft for rotation in the same direction;
• a direction changing train of gear within the casing of gear with negative train value for transmission of power from the driving shaft to drive the driven shaft for rotation in reverse direction;
• a clutch means comprising a movable ring attached to the circumference of the casing of gear which can generate angular displacement against the casing of gear, a return spring for the movable ring, a brake block extended from the train of gear to the circumference of the casing of gear and a brake element on the casing of gear to control the brake block in order to control the driving shaft to transmit via either the casing of gear or the train of gear;
• and a sensor means comprising a sensor element and a stop element fixed to an external shell which, by reaction of the sensor element contacting another object, a force is applied to the stop element for displacement in order to control the rotation of the movable ring and then to alter the engagement condition between the brake block and brake element of the clutch means for controling the direction of rotation of the driven shaft indirectly.