| 摘要 |
A drawer type cursor controller for portable computers mainly includes a drawer-like casing received in a lower part housing of a portable computer below a keyboard thereof for accommodating a track ball therein. The drawer-like casing for the track ball is slidably supported to be conveniently pushed into the lower part housing of the portable computer when the track ball is not in use, and is conveniently pulled out of the lower part housing of the portable computer when the track ball is to be manipulated. The drawer-like casing track ball is disposable at a pulled out position that permits an operator to use either right or left thumb to smoothly move the track ball in an ergonomically suitable position without hindering operation on the keyboard with other fingers.
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