| 摘要 |
A computer device, hereafter called PalmTrack, is provided having an oblong shape following the general outline of a human hand further comprising a finger portion, palm portion and thumb portion. The finger portion accommodates three levers which are operated by pressing with fingers. The palm portion fits the palm of a right or a left hand comfortably and has a track-ball judiciously placed so as to fit the cup of the hand ergonomically. Thus, the cursor placement and highlighting of objects on a computer screen is accomplished by moving the palm of the hand over the track-ball without moving the device itself and without the use of the thumb, which usually suffers most from pain and dysfunction after repeated use. Further, PalmTrack is provided with slidable finger portion so that the over-all size of the PalmTrack can be adjusted, and varied at will in situ while in operation so as to provide a personal, ergonomically suitable pointing device for computers. A material which is internally smooth can also be stretched over the track-ball while its soothingly rough rubber-like exterior provides additional aid for relaxing the hand. The cover also provides a reliable operation and longevity by protecting the electronic components inside the device from environmental contamination such as dirt and dust.
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