Operation changing mechanism responsive to direction change of a reversible motor

An operation changing mechanism for an electronic apparatus, comprising:

• a rotatable driving gear;
• means including an electric motor for selectively rotating said driving gear in opposed first and second directions;
• a first swinging gear in meshing engagement with said driving gear for rotation by the latter and a second swinging gear coaxial with said first swinging gear and rotatably coupled with the latter;
• mounting means rotatable supporting said first and second swinging gears and being swingable about the axis of said driving gear for orbital movements of the common axis of said first and second swinging gears about said driving gear while maintaining said meshing engagement between the latter and said first swinging gear;
• stop means for limiting said orbital movements in opposite directions at first and second positions of said common axis and to which the latter is urged in reaction to rotation of said driving gear in said first and second directions, respectively, while in said meshing engagement with said first swinging gear;
• a rotary cam member having peripheral gear teeth engageable by said second swinging gear from turning of said rotary cam member between first and second rotary positions said peripheral gear teeth having a toothless gap with a peripheral dimension to accommodate said second swinging gear and thereby halt turning of said rotary cam member in said first and second positions when said common axis of the swinging gears is in said first and second positions, respectively thereof, the extent of said orbital movements between said first and second positions of the common axis being related to said peripheral dimension of the toothless gap so that with said common axis in one of said first and second positions thereof and said second swinging gear accommodated in said toothless gap of the rotary cam member in one of said first and second positions of the latter, the orbital movement of said common axis to the other of said first and second positions engages said second swinging gear with said peripheral gear teeth for turning said rotary cam member in a respective direction to the other of said first and second positions of the latter, said rotary cam member further having at least one cam surface thereon;
• an actuating member engaging said cam surface and being reciprocally moved thereby in response to turning of said rotary cam member between said first and second positions of the latter for changing a respective operation of an electronic apparatus;
• and
• locking means for selectively locking said rotary cam member at said first and second positions thereof and thereby preventing inadvertent turning of said rotary cam member.