A method and system for implementing context aware synthesis of assertions is disclosed. An inner circumferential surface of a penetrating aperture disposed on a mounting member is an inclined pressing surface that is inclined relative to a shaft axis of the motor shaft such that an inside diameter of the penetrating aperture increases continuously toward the motor shaft. The guiding mechanisms guide the compatible visor along a confined path extending from a retracted position, where the compatible visor is proximate a frontal portion of the shell and substantially outside a field of view of the wearer, to a deployed position where the compatible visor is substantially below a frontal lower edge and within the field of view of the wearer.