| 摘要 |
A slide fastener, of the type having two strips provided with fastening devices, and having a slider that slides along the length of the edges of the strips to control the closing/locking and the opening/unlocking of the fastening devices of the two strips. The slide fastener has a blocking device affixed to one of the strips and that, when the two strips are interconnected by their fastening devices, extends across the path of the slider to block its movement in the opening/unlocking direction. The blocking device includes a feature whereby the retraction of the blocking device is automatically accomplished when the slider passes in the area of the blocking device in the closing/locking direction, and whereby the blocking device automatically returns to its blocking position after the passage of the slider.
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