A foldable device (1001, 1002,..., 1011, 2001, 2002, 2003, 3001, 3002) comprising: a hinge structure (100, 500) comprising a first body (110, 510), a second body (120, 520), and a first hinge (130, 530) connecting the first body (110, 510) to the second body (120, 520); a plate structure disposed on the hinge structure (100, 500), wherein the plate structure comprises a first plate region corresponding to the first body (110, 510) and a second plate region corresponding to the second body (120, 520), and a flexible display panel disposed on the plate structure, the flexible display panel comprising a first region horizontally fixed to the first plate region of the plate structure and a second region horizontally fixed to the second plate region of the plate structure, wherein the plate structure further comprises a third plate region connected between the first and second plate regions (210, 220) of the plate structure and having flexibility, and the first plate region of the plate structure is not horizontally fixed to the first body such that the position of the first region of the flexible display panel is not horizontally fixed to the first body, and the third plate region of the plate structure is not horizontally fixed to the first hinge, wherein in an unfolded state, a gap between the first plate region and the second body is greater than a first width of the first hinge, and an outer side of the first body is located inside an outer side of the first plate region of the plate structure, and the first hinge is configured to be out-foldable, wherein a second width of the third plate region of the plate structure in the unfolded state is greater than the first width of the first hinge in the unfolded state. characterized in that the second plate region of the plate structure is horizontally fixed to the second body such that the position of the second region of the flexible display panel is horizontally fixed to the second body. a hinge structure (100, 500) comprising a first body (110, 510), a second body (120, 520), and a first hinge (130, 530) connecting the first body (110, 510) to the second body (120, 520); a plate structure disposed on the hinge structure (100, 500), wherein the plate structure comprises a first plate region corresponding to the first body (110, 510) and a second plate region corresponding to the second body (120, 520), and a flexible display panel disposed on the plate structure, the flexible display panel comprising a first region horizontally fixed to the first plate region of the plate structure and a second region horizontally fixed to the second plate region of the plate structure, wherein the plate structure further comprises a third plate region connected between the first and second plate regions (210, 220) of the plate structure and having flexibility, and the first plate region of the plate structure is not horizontally fixed to the first body such that the position of the first region of the flexible display panel is not horizontally fixed to the first body, and the third plate region of the plate structure is not horizontally fixed to the first hinge, wherein in an unfolded state, a gap between the first plate region and the second body is greater than a first width of the first hinge, and an outer side of the first body is located inside an outer side of the first plate region of the plate structure, and the first hinge is configured to be out-foldable, wherein a second width of the third plate region of the plate structure in the unfolded state is greater than the first width of the first hinge in the unfolded state. characterized in that the second plate region of the plate structure is horizontally fixed to the second body such that the position of the second region of the flexible display panel is horizontally fixed to the second body.