| 摘要 |
The invention relates to an opening mechanism for door closers having a housing (2) which via a rotatable shaft (3) supports a pivot arm (4) which, when the door is opened, brings about temporary tensioning of a spring mechanism, for automatically returning the door to closed position after completion of the opening movement. The opening mechanism comprises a driver (10), which is movable by means of an electric motor (8) via a transmission (9) back and forth and which, when the door is opened manually remains in an inactive position in which it leaves the pivot arm (4) unaffected and, when the motor (8) is energised causes the pivot arm to move for opening the door. The driver (10) is adapted to move rectilinearly between its end positions and, when operated, to act on an auxiliary arm (14) rigidly connected to the rotatable shaft (3). |
