| 摘要 |
A keyboard for an information processing machine, such as personal computer, is designed so that each alphanumeric key has a rectangular upper surface of 17 mm to 20 mm in width and 20 mm to 25 mm in length. The distance between the upper surfaces of each key is set as 6 to 10 mm. These sizes are bigger than an average key board to allow an easy operation by a user with bigger body. The keyboard has actuators thereon arranged in a conventional keyboard distribution. But, the whole keyboard set is separated into two pieces of equal size and has apparently different configuration. One upper corner of each piece of the keyboard is pivotally connected to one end of a metal arm with a pivot joint. The other ends of two metal arms are connected each other via another pivot joint. This configuration enables a user adjusting the angle and span between the two pieces of a keyboard to maintain a more comfortable position than using conventional keyboard. A document to be typed can be placed between the two pieces of the keyboard of the current application.
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