Seat Unit

How does an umbrella crank work?

I am working on an umbrella re-design for a project at school and I need to know exactly how an umbrella crank works. Pictures could be helpful.

Public Comments

1. Sorry no pictures but I know how they work. As you turn the crank it winds up a nylon string, the string pulls a ring that the tines that support the umbrella frame are attached to. The tines push out on the frame and the umbrella is unfolded.