| 摘要 |
A retractable keyboard is described. The retractable keyboard is suitable for a handheld electrical device, and especially to a mobile phone with a personal digital assistant function. The retractable keyboard has a plurality of keyboard blocks coupling to an accommodating base of the handheld electrical device. Each of the keyboard blocks has parts of a complete keyboard. The expanded keyboard blocks form a whole keyboard having the same function and similar appearance dimensions of the complete keyboard, allowing convenient information key-in and control of the handheld electrical device. Only parts of the retractable keyboard are exposed for performing basic functions of the handheld electrical device when the retractable keyboard is retracted into the accommodating base.
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