Latch lever 1 turns about fixed axis A and has profiled cam surface a-a. Slide 2 moves in fixed guides B-B and has pin b which is engaged by surface a-a of lever 1. To clamp and lock slide 2 aigainst fixed flat surface f-f, lever 1 is turned clockwise. The profile of surface a-a is designed to prevent unintentional movement of slide 2 away from surface f-f.
$3149$SmC,GC$