| 摘要 |
A shoot bolt drive mechanism comprising a casing, a pair of drive transfer members 13, 14, means 17 for transferring the rotation of a handle into movement of the drive transfer members 13, 14, at least one bolt 15, 16 mounted in the casing and means for converting movement of at least one drive transfer member 13, 14 into movement of the at least one bolt 15,16 in a direction normal to the movement of the drive transfer members 13, 14. The converting means may be provided by a lug or projection 71 provided on the bolts 15,16 and slots 54 provided on the drive transfer members 13, 14. The slots 54 have an angled first portion 55 to first move the bolt in a direction normal to the drive transfer members 13, 14 and a horizontal second portion 56 to subsequently move the bolts 15, 16 parallel to the drive transfer members 13, 14. Preferably the bolts 15, 16 engage keyhole shaped slots. The mechanism may be used in doors and windows. |
