| 摘要 |
<p>A device for automatically opening and closing a window or door is provided to open and close the window or door by a driving device installed on a window or door frame and to prevent the window or door from freezing during the winter by installing heating wires in rails of the frame. A device for opening and closing a sliding window or door comprises a first window or door frame having plural rails which have built in heating wires and having a mounting part on one side, a driving device having a driving motor(20) installed on the mounting part of the first frame, a driving unit(21) installed to a shaft of the motor, a driven unit(40) installed on one side of the window or the door and receiving the driving force of the driving unit, and a second window or door frame corresponding to the first window or door frame and having plural rails having built in heating wires. The driven unit is supported by an elastic support.</p> |
