Retractable display apparatus

A retractable display apparatus comprising a panel-shaped first casing having an image display surface;

• and a second casing that openably and closably supports the first casing with a hinge;
• the retractable display apparatus in which when the first casing is closed to the side of the second casing, the second casing holds the first casing by inserting and locking a releasably movable type lock claw provided in the second casing, in a rectangular lock hole provided in the side portion of the first casing opposite the side to which the hinges are attached,
• wherein the first casing composed of a frame cover and a back cover comprises:
• a plurality of primary engaging means provided at least in the butt edge portions on the side to which the hinges are attached, and engaging the butt edge portions, the plurality of primary engaging means being part of the frame cover and the back cover;
• and
• a secondary engaging means located internally in front of the rectangular lock hole, having a flexible piece extending from one of the covers toward the other thereof and engaging the other of the covers with the free end of the flexible piece;
• and
• wherein a fit state where the frame cover and the back cover are combined is established by both the engagements of the primary engaging means and the secondary engaging means, while the engagement of the primary engaging means is set in a releasable state by inserting a tool into the rectangular lock hole and inwardly flexing the flexible piece to release the secondary engaging means from the engagement.