| 摘要 |
The cursor control device comprises a ball housing for accommodating a ball and a grid wheel device driven by the ball for intermittently passing a light to control a movement of a cursor; A wheel shaft device is engaged with the grid-wheel device and driven by ball; An urging device includes a recess in which a connection device mounted. A spring is mounted between an interior wall of the recess and the connection device for facilitating the wheel shaft device to be in close contact with the ball. The urging device is engaged with the wheel shaft device for urging and the wheel shaft device against the ball to assure that the grid wheel device can rotate synchronously with the ball. A Z-direction positioning device is engaged with the ball housing for rotatably confining the ball in the housing. The Z-direction positioning device includes a positioning recess and a positioning roller accommodated in the recess. The grid wheel device includes an X-direction grid wheel and a Y-direction grid wheel for controlling the movement of the cursor in the X and Y-directions.
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