| 摘要 |
The invention refers to a coordinate device (1) which enables manual control of x- and y- coordinates. The coordinate device (1) comprises a rolling cylinder (5) which freely can rotate around a rotation axle, be translated along the rotation axle and be pressed down to generate a pressure signal. The rolling cylinder (5) is carried in an upper support rail (8) and is held in this in bearings which allow the rolling cylinder to rotate. A lower support rail (11) receives the upper support rail (8) and comprises motion detector elements (13) which detect the rotation and translation of the rolling cylinder (5). The control element (5, 8, 11) comprising the rolling cylinder (5) and the upper (8) and lower (11) support rails are mounted to be pressed down from a standby position in a cover (2, 15) and activate a pressing down sensor (17). Since the whole control element then is being pressed down, without the rolling cylinder (5) being raised or lowered relative to the motion detector element (13) on the lower support rail (11), the pressing down does not affect the measurement values of the motion detector element (13). In one design of the coordinate device (1) the upper support rail (8) comprises feet (9a-d) which allow it to translate in the longitudinal extent of the lower support rail (11) and the lower support rail (11) comprises a recessed track (22) which is intended to receive a first pair of the feet (9c-d) on the upper support rail and allows this to move along the track. In another design of the coordinate device (1) the feet (9a-d) comprise wheels, which enable the translation movement to take place with even less friction. |
