Waterproof structure and electronic device comprising same

An electronic device comprising:

• a body having a passage;
• a physical button comprising a rod extending through the passage;
• and
• a waterproof member comprising:
• an inner surface which comprises a first convex surface, a second convex surface formed to have a gap with the first convex surface, and a first concave surface positioned between the first convex surface and the second convex surface,
• a penetration hole formed by the inner surface,
• an outer surface comprising a third convex surface, a protruding surface formed to have a gap with the third convex surface, and a second concave surface positioned between the third convex surface and the protruding surface,
• a lower surface formed between the inner surface and the outer surface, and
• a fourth convex surface formed in a direction opposite to the lower surface,
• wherein the waterproof member is disposed between the body and the rod,
• wherein the rod is inserted through the penetration hole,
• wherein the waterproof member is disposed such that the first convex surface and the second convex surface are in close contact with the rod,
• wherein the third convex surface and the protruding surface are in close contact with one surface of the body, and
• wherein the first concave surface overlaps the second concave surface in a direction perpendicular to a direction in which the rod is inserted through the penetration hole.