| 摘要 |
A window covering device has a top rail, a middle rail, and a bottom rail. A covering is connected with the middle rail and the bottom rail. Two cord controllers and two cord sets are provided in the top rail. The two cord sets are mounted respectively through the cord controllers. One cord set is connected with the middle rail, and the other cord set is connected with the bottom rail through the middle rail and the covering, thus the window covering is able to be opened from lower part or from upper part. The top rail, middle rail and the bottom rail are all made of plastic. The window covering device can be adjusted conveniently as people's desire.
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