I have an assembly where the upper portion moves down, and a spring-loaded part hits another spring-loaded part in the middle portion and overcomes it. Then both the upper and middle sections move until the middle section hits the solid lower section. The middle stops while the upper section continues.
Please edit your post. Make the title shorter and put your question in the text portion. I know the setup is confusing, so it's not your fault, but it will be very difficult, if not impossible, to help until you do that.