storch telescopic platform operation

[giuliagill]

hi to everyone, I'm a design student and I'm doing a project so I need to figure out how this telescopic platform works that I found on the internet. how can you block the platform during the maximum extension so that it does not involuntarily close?
Thank you!

 

[meccanicamg]

It would be good that I did not post the same for n different sections.
we ask the moderator to delete this conversation that besides being double does not have to do with catia.