| 摘要 |
A safety pole device for a sliding door is provided to allow a safety pole to be entered into the inside of the door during opening the door through using attractive and repulsive force of electromagnets. A safety pole device for a sliding door comprises a sliding door(10), a safety pole(20) moving according to the open/closing operation of the sliding door, an arm bracket(30) mounted to be coupled with the safety pole, a power supply unit(40), and a door detector(50) to determining whether the door is open/closed. The sliding door includes two electromagnets(11,12) positioned on both inside ends thereof, and one permanent magnet(15) to be open/closed by a sliding operation due to the movement of a lower rail. The electromagnets maintain the negative pole in ordinary times. The negative pole of the electromagnets is converted into the position pole when an electric current is supplied.
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