| 摘要 |
A case structure and a method for pre-forming the same are described. The pre-forming method includes the following steps. A first case body and a second case body are supplied. Two side plates of the second case body are bent, such that the two side plates respectively form an initial angle with the bottom plate. The second case body is disposed in the first case body. The two side plates are pulled to respectively come close to two side walls of the first case body, such that the bottom plate forms a curved surface in the first case body. When having an object disposed therein, the case structure overcomes a downward pressure generated by the object through the curved surface, thereby preventing the first case body and the second case body from sagging out of the case structure.
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