This is what the spring assy looks like:
I too have this window awning. It does not have an anti-billow lock, nor does it lock unfurled. It is held open by hooking the pull-strap to the hook under the window. The spring inside the tube will rust over time and stick if not lubricated yearly.
I have one that would stick unfurled, when given a nudge with the awning rod it would slowly roll-up.
I sprayed PB Blaster into the holes in the end caps (guessing spring location) once a day for several days, and rolled it up via the nudge thing. After 2/3 days it began moving a bit then sticking again and began operating normally.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"