| 摘要 |
The lock has a base plate with four adjustable tilt rods actuated by a driven nut. A stop prevents retraction of the rods. The nut has a thick metal round plate (19) with a rectangular cut out (19a) for a four-sided shaft. A cylindrical disc (19b) is pressed out of the plane of the plate to leave a small break through zone. The peripheral surface of the cylindrical plate is rotatably mounted in a bearing plate (16) of the lock mechanism. |
