Photographic apparatus and case structure thereof

A case structure comprising:

• a main body having an accommodating space and an inner wall surface forming the accommodating space, the accommodating space having an opening, the main body comprising at least two first fastening portions;
• a cover assembled to the main body in a detachable way, the cover having a connection position and a lock position relative to the main body, the cover having an annular side wall surface and at least two second fastening portions;
• and
• a seal disposed around the annular side wall surface of the cover;
• wherein one of each of the first fastening portions and each of the second fastening portions has a release section and a fastening section connected to each other, the other of each of the first fastening portions and each of the second fastening portions has a support arm and a block extended from the support arm, when the cover is at the connection position, the cover covers the opening, the two support arms are located on the two release sections respectively, and the seal is disposed between the inner wall surface and the annular side wall surface to form a waterproof space between the main body and the cover, and when the cover rotates an angle relative to the main body to move from the connection position to the lock position, the two support arms move from the two release sections to the two fastening sections respectively, and the two blocks are fastened with the two fastening sections, so as to make the cover be fixed to the main body.