| 摘要 |
PURPOSE: An apartment door is provided to easily operate with an identifying device, a motor, a gear and a shutter in order to identify visitors. CONSTITUTION: A worm gear(6) rotates a worm wheel(2) by the movement of a button switch(8). The worm gear is installed in a motor(7) and the worm wheel is installed in a rotating shaft(5). Also, a gear wheel(3) combined with the worm wheel is rotated so that a shutter moves to an identifying device. The shutter moves to the right and left by a roller. Therefore, the door prevents a crime caused by opening the door without identification.
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