| 摘要 |
A mouse for controlling a cursor in three dimensions includes a housing 2 containing a ball (not shown) for X-axis and Y-axis control, and an independent device for Z-axis control. The device comprises a driving wheel 6 partially projecting out of the housing for turning by hand. The direction and extent of rotation of the driving wheel is detected electro-mechanically by conductive strips and elements 12, 111 and metal spring strips 3-5, or optically by a transparent grid wheel (151, figure 5), a light source (7) eg. a LED, and a photo-sensor (8) eg. a photo transister.
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