| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve operability due to the difference of the rotating directions of a ball by uniformly making close the torques of the operation of the ball. <P>SOLUTION: This track ball is provided with a ball (11), an image sensor (12) for detecting the movement of the ball, first driving means (13x, 14x, 15x, 16x) for rotating the ball to the X direction, second driving means (13y, 14y, 15y, 16y) for rotating the ball to the Y direction and rotation habit canceling means (14m, 14n) to be butted to the outer peripheral face of the ball (11) in a direction deviating to the X direction and the Y direction in order to improve operability due to the difference of the rotating directions of the ball (11). <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
