Patent ID: 7550667

Claim:
A case structure for an electronic device, at least comprising: a main body comprising an upper case and a lower case, wherein recesses are respectively formed at sides of the upper case and the lower case, and a first mounting portion is formed at a predefined position on the recess thereof, and includes at least one perforation and slot; and at least one side piece detachably mounted to at least one side of the main body, wherein the side piece is substantially U-shaped to cover the recesses and has a second mounting portion formed corresponding to the first mounting portion and including at least one tenon and hook, an upper surface of the side piece is in the same plane as a surface of the upper case and a lower surface of the side piece is in the same plane as a surface of the lower case after the side piece is joined with the recesses, and the side piece is stably mounted to the main body by engaging the first mounting portion with the second mounting portion.