| 摘要 |
The invention relates to a retraction device for a leaf of a door or window, having a housing, a piston that is arranged in an accommodation space of the housing and is loaded with a spring, and a shaft that is mounted in the housing and interacts with the piston, an actuating arm for the leaf being arranged in a rotationally fixed manner on the shaft. The piston is formed in two parts comprising a spring piston and a damping piston, wherein the spring piston and the damping piston each have at least one projection or tooth (24) of a set of teeth that interacts with at least one driver arranged on the shaft, the head face of which driver forms a free-running device having a free-running region, wherein at least one of the projections or teeth arranged on the spring piston decouples the shaft from the spring piston in a sliding manner on the free-running region. |
