| 摘要 |
The device has a tension unit (20) connecting two bases (10, 12) such that the tension unit transfers a tensile force between the bases. Two support units (30, 32) are pivotably supported at the two bases such that the tensile force is transferred between the bases. Each of the bases has V-shaped recesses (14, 16) in which the support units and/or tension unit is supported. A V-angle of the support units and/or tension unit is smaller than that of the associated recess. |
