| 摘要 |
An electronic device includes a housing, a key board, and a height adjustment apparatus. The key board includes a number of first keys and a number of second keys. The height adjustment apparatus includes a platform for supporting the second keys, a cross bridging, a sliding button, and a pushing rod. The cross bridging includes a first supporting arm and a second supporting arm, the first supporting has an end slidably connected to the platform and the other end pivotably connected to a securing portion. The second supporting arm has an end slidably connected to the platform. The sliding button includes a lever surface facing the cross bridging. The pushing rod includes a first end pivotably connected to the other end of the second supporting arm and a second end resisting the lever surface.
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