Cross-shaped lever 1 turns about fixed axis A and is subject to the action of flat spring 4. Link 2 has two prongs with projections a. Ends b of the cross-shaped lever engage projections a which serve as latches. In an engaged condition, lever 1 is in the position shown in the drawing. When link 2 is pushed to the right, lever 1 is returned by spring 4 to its initial position (shown by dash lines). At this, end c of lever 1 contacts end e of link 2. Lever 1 has dual action: i t can also engage lower projection a of link 2. Spring 3 returns link 2 to its initial position.
$154$SL,L$