| 摘要 |
<p>A computer joystick (10; 60) comprising a joystick handle (14), a joystick mechanism (20) having two mutually perpendicular rotatable shafts (38, 40) in frictional contact with an engaging element (24) at the bottom end of said joystick handle, and a transducer associated with each of said shafts is characterized in that said transducers consist of optical sensors (42, 44) in proximity to corresponding optically readable rotation indication elements (41, 43) on said shafts and wired to a control circuit (48) having a memory (50) for storing coordinates indicating the positions of said joystick handle (14) and a processor (54) for updating the coordinate storage in said memory according to displacement signals from said optical sensors (42, 44) and generating vector signals according to the stored coordinates to indicate the current position of the joystick handle (14). Thereby the problem is overcome that the joystick is susceptible to wear or forceful handling. <IMAGE></p> |
