| 摘要 |
A window comprises an inner and outer frame; a locking mechanism moveable between an unlocked position in which the inner frame is free to move relative to the outer frame and a locked position in which, when the inner frame is in the closed position. A stay arm 4 is mounted on one or the other of the inner frame or outer frame and is moveable relative to said frame. Movement of the stay arm 4 relative to the inner frame or outer frame causes the locking mechanism to move between the locked and unlocked positions. The stay arm 4 may have a rack 12 and pinion 11 mechanism wherein movement of the stay arm 4 causes movement of the pinion 11 which in turn moves the rack 12 and a metal casement bar 13. The casement bar 13 may extend around the periphery of the frame and is coupled to the locking mechanism. There may be more than one locking mechanism and it/they may comprise at least one shot bolt and/or locking pin. |
