| 摘要 |
PURPOSE: An automatic fireproof shutter closing device is provided to reduce manufacturing costs or assembly costs thereof. CONSTITUTION: An automatic fireproof shutter closing device comprises a speed reduction motor(110), a lead screw(120), a moving plate(130), a lever operating rod(140), and a control substrate(150). The speed reduction motor comprises a direct current motor generating torque and a speed reducer which reduces the rotation speed of the direct current motor. The lead screw is rotated according to the rotation of an output shaft. The moving plate releases the braking state of a fireproof shutter. In the control substrate, a controller is loaded.
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