| 摘要 |
A miniature alpha-numeric keyboard, operated by one hand, for use with computers, cell phones and mobile electronic devices. The device has only 4 keys, one dedicated to each of the four fingers, and a thumb receptacle or pouch, arranged in such a way that when the thumb is inserted in the pouch, the four fingers rest naturally on the four keys. While the keyboard is being operated, the thumb inserted in the receptacle supports the keyboard in position, each of the four fingers resting above its own key, preventing it from moving out of place. Support against the fingers depressing the keys is provided by resting the device against another object—a table, an armrest, the operator's own body or pocket—or any other object that a hand would normally rest on. Alphanumeric, control and special characters are generated by pressing the four keys using composite keystrokes, as described in U.S. Pat. No. 6,952,173.
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