| 摘要 |
A casing of an electronic device is proposed, which includes a first casing member having at least an expansion interface slot for being connected with an expansion device, and an opening corresponding to the expansion interface slot; a second casing member covering the first casing member and having a gap corresponding to the expansion interface slot; and a detachable covering member capable of being detachably assembled to the gap of the second casing member, wherein the gap can reduce the fall of level between the casing members and avoid an opening of an expansion interface slot being obstructed due to a downward oblique configuration of the casing, allowing the expansion interface slot of the first casing member to functions normally and avoiding dust from entering into the expansion interface slot, thereby improving the connection and signal transmission quality.
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