| 摘要 |
The device for the input of graphic analog data into a computer comprises a lightweight ball (6) and measuring rollers (33) injection formed on axles (54) each of which carries at its other end a disc (32) of an associated opto-electronic generator. These axles (34) are pivoted in sleeves (27) injection formed together with a mask (28) which is located in front of the corresponding discs (32). These sleeves (27) are fixed by clipping onto a base (1) of the housing. A resting roller (20) cooperates with the ball (6) and is carried by a balance (14) pivotally mounted on the base (1) of the housing and resiliently biassed by a spring (18) into contact with the ball (6) to apply the ball (6) against the measuring rollers (33) and towards the base (1) of the housing. <IMAGE> |
