Foldable electronic device having foldable display

A foldable electronic device, comprising:

• a first casing;
• a second casing;
• a hinge structure disposed between the first casing and the second casing and connecting the first casing and the second casing, wherein the hinge structure comprises:
• a plurality of supporting blocks arranged side by side between the first casing and the second casing, wherein each of the supporting blocks comprises two shaft portions arranged side by side;
• a plurality of first hinge blocks arranged on one side of the supporting blocks, wherein the two adjacent supporting blocks are connected to each other through one of the first hinge blocks, and the first hinge blocks rotatably and slidably connect the supporting blocks, wherein each of the first hinge blocks has two first sliding slots disposed symmetrically and two second sliding slots disposed symmetrically between the two first sliding slot;
• and
• a plurality of second hinge blocks arranged on the other side of the supporting blocks, wherein the two adjacent supporting blocks are connected to each other through one of the second hinge blocks, and the second hinge blocks rotatably and slidably connect the supporting blocks, wherein each of the second hinge blocks has two first sliding slots disposed symmetrically and two second sliding slots disposed symmetrically between the two first sliding slot,
• in the two adjacent supporting blocks, two of the four shaft portions respectively pass through the two first sliding slots of one of the first hinge blocks, and the other two of the four shaft portions respectively pass through the two second sliding slots of one of the first hinge blocks,
• in the other two of the adjacent supporting blocks, two of the four shaft portions respectively pass through the two first sliding slots of one of the second hinge blocks, and the other two of the four shaft portions respectively pass through the two second sliding slots of one of the second hinge blocks;
• and
• a foldable display comprising a first bonding portion secured to the first casing, a second bonding portion secured to the second casing, and a foldable portion located between the first bonding portion and the second bonding portion, wherein the foldable portion is aligned with the hinge structure.