Patent ID: 7397006

Claim:
An operation mechanism for electric apparatus, the operation mechanism comprising: actuators; an electric component that includes a return spring that causes the actuators to automatically return to an initial position; a circuit board mounted with the electric component; a housing that covers the circuit board and includes an opening formed at a position that faces the actuators; and an operation grip that includes an operation shaft that is inserted into the opening to be engaged with the actuators and which has an engaging portion at a leading end portion thereof, the operation grip being movably operated with respect to the housing to cause the operation shaft to drive the actuators, wherein a guide portion engageable with and disengageable from the engaging portion is provided to a region on inner walls of the housing or to a chassis portion of the electric component, and wherein, in an assembly process of installing the operation grip to the housing, the operation shaft inserted into the opening is guided into the housing through engagement between the engaging portion and the guide portion, and the engaging portion is separate from the guide portion when the operation shaft has been inserted into the opening by a predetermined length.