| 摘要 |
In a device for the limited opening and closing of turn-and-tilt windows, having an electric motor, the rotational movement of which is converted into a rectilinear pushing or pulling movement by means of a spindle nut running on a spindle, the object of designing this device so that it can be easily actuated manually, but also by means of a time switch, care being taken, as far as automatic time switch actuation is concerned, to ensure that this device is not disturbed or even destroyed, is achieved in that there is provided on the spindle nut an extension piece which runs in the direction of the spindle axis and is guided on the window frame and which carries an arm which is at an angle to the spindle axis and on the free end of which is provided a guide body which is under spring load and which engages into a guide curve fixed to the casement. |
