| 摘要 |
The aid has bearing devices with which ball elements (5) are rotatably mounted in a housing (1). Detent devices and the ball elements are secured in different rotational positions such that an aperture (6) is arranged in different rotational positions and attached to a motive and/or color markings in a region of the ball elements. The detent devices comprise a locking element arranged at a shaft. The locking element cooperates with a counter locking-element in the different rotational positions. |
