| 摘要 |
The device (D) has a spacer element (2) for spacing jaws (10) formed by a cage, and actuating units for moving the spacer element relative to the jaws. The actuating units include a pivotable lever (3) that pivots around a first pivot pin (A1). The actuating units include a connection bar (4) that is connected to the lever via a second pivot pin (A2) and to an abutment element (5) via a third pivot pin (A3), where the three pins are parallel, and distance between the first pin and the third pin is variable by actuating the lever. The cage is made as a single piece by extruding metal. |
