| 摘要 |
A keyboard comprising a plurality of alphanumeric keys or function keys separated into a left key section containing the keys operated by the left hand and a right key section containing the keys operated by the right hand. The longitudinal axes of the rows within each section are substantially parallel to each other and substantially perpendicular to the longitudinal axes of the operator's forearms. Each column of the keyboard is substantially aligned with the line of movement of the finger controlling the respective column in order to accommodate the natural fan-like movement of the operator's fingers as the fingers curl and uncurl during the typing operation. The parallel rows and the transverse columns of the alphabetic keys form a substantially trapezoidal shape, wherein the length of the rows is progressively larger from the bottom row to the top row, which permits the operator's fingers to make a fan-like movement in contrast to the conventional keyboard which constrains finger movement to narrow parallel columns. The trapezoidal shape permits the operator's fingers to move up and outward relative to the palm when typing keys in the top row and down and inward toward the palm when typing keys in the bottom row. The length of the rows is varied by altering the size of the individual alphabetic keys based on the natural lines of movement of the finger and the level of dexterity exhibited by each finger. Generally, outer and upper keys are slightly larger than inner and lower keys.
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