17th century Low countries crossbow with windlass

[Marcus den toom]

Thanks, i am breaking my head on mine though..
i attached a image of what mine looks like.. i understand how it works when its armed, but i can't figure out how it would work after releasing the trigger.

The trigger has a small nodge which keeps the trigger from releasing (and a bigger nodge for keeping the sear in bounds).
Whence the trigger is released the sear is pushed down without a force counteracting it. How it will be armed again with the sear on the trigger nodge...