Qinbrolly
中文

Umbrella metal part

Auto Close / Return Spring

Overview

Made by
In-house or supply chain
Materials
Music wire (SWP), Spring steel, Stainless spring steel
Finish options
Zinc plating, Black oxide, Anti-rust oil

Manufacturing process & quality control points

Qinxi in-houseSupply-chain supportIn-house or supply chain
  1. 1

    Coiling

    In-house or supply chain

    Return spring coiled to its specified rate; on an auto open-close frame it works against the opening spring, so the two rates must be matched.

    Quality control points

    • Spring rate / load · Spring tester at working height · 5 pcs per batch
    • Free length · Caliper · First article + 5 pcs per batch
  2. 2

    Stress relieving

    In-house or supply chain

    Stress relieved to prevent length loss over the product life.

    Quality control points

    • Dimensional stability · Re-measure after treatment · 5 pcs per batch
  3. 3

    Surface protection

    In-house or supply chainSurface Finishing

    Plating, black oxide or oil to survive the wet environment inside the shaft.

    Quality control points

    • Corrosion resistance · Neutral salt spray per buyer spec · Per order
  4. 4

    Function check in assembly

    Qinxi in-houseAssembly

    Verified on the finished umbrella: one press opens, second press retracts, every time.

    Quality control points

    • Auto close function · Open-close cycling to buyer spec, no failure to retract · 5 pcs per batch

Used in

Automatic Open-Close 3-Fold Umbrella

Relevant compliance

Get a quote for Auto Close / Return Spring

Custom materials, finishes and logos available. Send your drawing or sample.

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