Umbrella frames depend on tiny springs in the runner catch, the rib joints and the automatic opening mechanism. They are low cost parts produced in large volumes, and every one of them has to work at the moment the user needs it.
The spring that locks the runner is small and cheap, and it is the single part that decides whether the product feels reliable. Force is set at sampling against the actual runner.
Umbrellas are folded away wet as a matter of routine. Zinc, nickel and stainless options handle that far better than an unplated carbon steel spring.
Automatic coiling in 0.1 to 2 mm wire is exactly the range where machine production beats hand work on both price and consistency.
Helical springs that push back under load
Torque delivered through an angle, not a stroke
Bent wire parts that are not coils at all
Production photographs of parts from the families above.
The same seven step route applies to every industry we supply, with inspection built into it rather than added at the end.
Automatic coilers are the right equipment for repeat high volume parts in fine wire, which is the typical umbrella hardware requirement.
Yes. Send the frame or the loose springs and we will measure and reproduce them.
Zinc or nickel plating for cost sensitive frames, stainless where the product is positioned as a long life item.
Tell us the position the spring sits in, the load it carries and the environment around it. That is enough to start.