An automated door closure system regulate the release and closure of a door in a door assembly that includes a primary door, a secondary door, and a door frame. The system includes a door closer, a control unit, and an automatic input sensor. The door closer, which is connected between the secondary door and the door frame and includes a cylinder and an operating rod, biases the secondary door toward a closed position. The control unit includes a motive device and a rod catch element. The rod catch element, which may be moved by the motor, is positioned in proximity to the operating rod to adjustably prevent the secondary door from being closed. The automatic input sensor detects a door assembly use condition. The control unit controls the motive device based on the detected condition to move the rod catch element, allowing the door closer to close the secondary door.

The present disclosure provides a structure configured to preset an automatic positioning duration to enable hinge blades to be automatically closed, the structure two hinge blades, a threaded sleeve, a fixed rod, a first spring, a electromagnet suction disk, a DC power supply electromagnet, a DC power supply timing controller, a remote control, a plug, and an adjusting base. The two hinge blades are configured to rotate relative to each other, each of the two hinge blades comprises a shaft sleeve and a blade fixed on an outer side of the shaft sleeve, the fixed rod comprises a threaded rod, the threaded sleeve comprises a transmission rod fixed in the shaft sleeve of the two hinge blades, the plug is fixedly disposed in the shaft sleeve of the two hinge blades, the threaded sleeve is separated from the plug, and the fixed rod, the first spring, the electromagnet suction disk, the power supply electromagnet, a bearing, and the adjusting base are disposed between the threaded sleeve and the plug disposed in the shaft sleeve of the two hinge blades. When the hinge blades reach the automatic positioning time preset by the timing controller, so that the hinge blades synchronously cooperates with the demagnetization time point preset by the timing controller. At the same time, the elastic force energy storage of the first spring changes and releases. An application of the present disclosure is wide, and has good industrial applicability.

A drive unit for closing a leaf of a door or a window comprises an energy accumulator for providing a closing force for closing the leaf, a damping device which counteracts the closing force and has an electric motor which can be operated as a generator and can be coupled to an actuating element of the drive unit, and a control device for controlling the electric motor. The control device is designed to determine a nominal path curve which indicates a position of the leaf or a closing speed of the leaf in dependence upon time, and to perform the control of the electric motor in order to damp the closing movement of the leaf on the basis of the established target path curve.

A drive unit for closing a leaf of a door or a window comprises an energy accumulator for providing a closing force for closing the leaf, a damping device which counteracts the closing force and has an electric motor which can be operated as a generator and can be coupled to an actuating element of the drive unit, and a control device for controlling the electric motor. The control device is designed to determine a nominal path curve which indicates a position of the leaf or a closing speed of the leaf in dependence upon time, and to perform the control of the electric motor in order to damp the closing movement of the leaf on the basis of the established target path curve.