| 摘要 |
The device comprises a tensioning lever which acts on a traction member connected to the tensioning lever by means of a slide. At the time of opening of the tensioning lever, the traction member is held at the end of the slide close to the axis by an automatic retention member, such as a catch articulated on the tensioning lever. Pressure on the tensioning lever has the effect of acting on the catch which then frees the traction member which slides to the other end of the slide. Three positions can thus be obtained: closed, relaxation, open. A second traction member can be connected to the same tensioning lever. |
