| 摘要 |
The shaft (9) of the control element (4) is equipped with an outer thread (10) fitting into the inner thread (12) of a case (8). A drive element (7), joined to the shaft (9) by a magnetic coupling, causes the shaft (9) to rotate until the outer thread (10), positioned at the shaft (9) is lifted above thinner thread (12) of the case (8) to a narrow area (11). This applies for the opening and the closing motion. The drive element (7) is not restricted in its rotation, while still moving the shaft (9) and the control element (4). The position of the control element (4) is not affected. |
