| 摘要 |
The invention refers to a locking unit for a movable distance device (3) used together with a projectile, which distance device is locked by a backwardly converging conical surface and a number of balls (11) so that the distance device (3) at the acceleration of the projectile is pinched to the conical surface when the balls (11) are moving backwards in the formed wedge-shaped chamber (10). |
