Ok so I have hauled many cars in this trailer for 19 years. Today I went to load a car and when loading the car the tongue is lifting up, disengaging from the ball!😳

I keep messing with it and making sure the mechanism is under the ball and cradelungvut but it keep popping off.

So apparently something is broken or bent?

So I’m on line trying to figure out what mechanism or parts I can order for it. I can’t find what I need . Is there a specific name for this type of mechanism or keyword to locate parts ?

Thanks for any assistance