Electronic device including key assembly and operation method thereof

An electronic device comprising:

• a housing comprising a first plate facing in a first direction and a second plate facing in a second direction opposite to the first direction;
• and
• a key assembly disposed on at least part of the first plate and comprising a plurality of keys for inputting data by a pressing operation, wherein the key assembly comprises:
• a keycap;
• a printed circuit board;
• a support structure which supports the keycap;
• a restoring member disposed between the keycap and the printed circuit board to restore the pressed keycap to an original position;
• a connection rod coupled to the support structure in the second direction;
• and
• an actuator coupled to the connection rod and deformed depending on whether it is activated to provide a force for moving the connection rod in the first direction or the second direction,
• wherein the connection rod moves upward in the first direction by an operation of the actuator, and thus the keycap is prevented from moving downward to disable an input operation of the keycap.