Abstract: The position control mechanism is provided to be pivotally mounted on a side of a full-faced and open-faced helmet. The position control mechanism includes at least a helmet body, at least a pair of control units, at least a chin guard and at least a visor plate. A pair of inserting feet are disposed in each side of the chin guard and a pair of inserting feet disposed on a fixing unit in each inward hollow of the chin guard, so as to move each adjusting article to be operated to adjust the positions of the chin guard and the visor plate of the helmet.

Abstract: The position control mechanism is provided to be pivotally mounted on a side of a full-faced and open-faced helmet. The position control mechanism includes at least a helmet body, at least a pair of control units, at least a chin guard and at least a visor plate. A pair of inserting feet are disposed in each side of the chin guard and a pair of inserting feet disposed on a fixing unit in each inward hollow of the chin guard, so as to move each adjusting article to be operated to adjust the positions of the chin guard and the visor plate of the helmet.

Abstract: The position controlling mechanism is provided to be pivotally mounted on a side of a full-faced helmet for adjusting the positions of a chin guard and a visor plate of the helmet. The position controlling mechanism includes at least a chin guard, at least a spring, at least a rotor, at least a visor plate, at least an interaction gear, at least a transmission gear, at least a rotative element, at least an elastic ring and at least a visor plate base. After the position controlling mechanism being assembled, the rotor is capable of being rotated to transmit rotation to a gear chain, so as for the chin guard and the visor plate to be moved between activated and retracted positions.