Electronic device including slide-out display

An electronic device comprising:

• a housing including a back cover;
• a first pulley and a second pulley disposed as adjacent to a first edge and a second edge of the housing, respectively;
• a support sheet disposed as covering the first pulley and the second pulley when viewed from above;
• a multi-bar structure attached to a first section of a bottom surface of the support sheet and movably coupled with the first pulley;
• a sliding plate attached to a second section of the bottom surface of the support sheet as overlapping the second pulley such that the sliding plate is to slide out and slide in with respect to the housing via the second edge according to the multi-bar structure being moved by a rotation of the first pulley;
• a flexible display attached to a upper surface of the support sheet as overlapping at least part of the multi-bar structure and at least part of the sliding plate, and configured to be at least partially bent according to the sliding of the sliding plate;
• and
• a connection member movably coupled with the second pulley such that a first ending portion of the connection member is operatively coupled with a portion of the support sheet and a second ending portion of the connection member is attached to a portion of the sliding plate.