| 摘要 |
At least the one articulated component (22) in the second articulated part (20) incorporates alternatively a circular projection (24) which can be brought into engagement with one of several circular recesses in the first articulated part (10). This circular recess is complementary to the projection in the second articulated part. Alternatively, several circular recesses can selectively be brought into engagement with a circular projection on the first articulated part, which is complementary to the recess in the second articulated part. The recesses are arranged on a preferably spherical surface (12) in the corresponding articulated part. The projections and recesses are ring-shaped and the recesses overlap each other on the preferably spherical surface. |
