专利名称：Trackball device发明人：Tsuyoshi Aoki申请号：US07/514391申请日：19900425公开号：US05078019A公开日：19920107
摘要：A trackball device comprising a housing having a circular opening formed in atop wall thereof, a ball received in the housing and partially projecting through thecircular opening, a pair of rotatable members arranged orthogonally to each other androtatable in accordance with rotation of the ball, detectors capable of detecting theamounts of rotation of the respective rotatable members, and elastic members arrangedin the vicinity of the edge of the circular opening and capable of suppressing vibration ofthe ball.
申请人：ALPS ELECTRIC CO., LTD.
代理人：Guy W. Shoup,Paul J. Winters
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