| 摘要 |
A portable computer includes a main board casing that confines a receiving space therein, and that has a rear end coupled pivotally to a display casing, and a top side formed with a keyboard receiving recess. A main board module is received in the receiving space. A keyboard device is disposed removably in the keyboard receiving recess, and includes abase member, a keyboard circuit disposed on a top side of the base member, and a plurality of keys disposed on top of the keyboard circuit and operably associated with the keyboard circuit so as to enable the keyboard circuit to generate a corresponding keyboard signal upon operation of one of the keys. The signal transmission unit, which is coupled to the keyboard circuit and the main board module, makes electrical connection between the keyboard circuit and the main board module when the keyboard device is disposed in the keyboard receiving recess, and breaks electrical connection between the keyboard circuit and the main board module and permits connection between the keyboard circuit and an external electronic device when the keyboard device is removed from the keyboard receiving recess.
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