| 摘要 |
The blocker 1 has a base 2 and a pivoting bar (fig2,3), in use the base is mounted on the frame of a window or door and the bar is rotated from an unblocking position to a blocking position where it overlaps the sash preventing it from opening; a key operated lock 4 allows the bar to be locked in the blocking position without a push button or spring loading, and remains locked if the key is removed. Preferably the blocker is lockable in up to three positions, at least one of which does not block the sash. The bar may have a pin 3a receivable in a hollow post in the base, the post and lock preferably each have concave portions (fig5,2d,2e,2f,4b) which co-operate. The sash blocker may for part of a window or door assembly in a building or structure. |
