| 摘要 |
An electronic device including a circuit board, a substrate, and at least one button unit is provided. The circuit board has a first surface and at least one switch thereon. The substrate has a second surface, a third surface opposite to the second surface, and at least one protrusion on the second surface. The third surface of the substrate and the first surface of the circuit board are face to face, and the protrusion is above the switch. The button unit is fixed on the second surface of the substrate. The button unit has an opening, and the protrusion passes through the opening.
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