Custom Series · Foldable

Foldable Phone Cases Built Around the Hinge

A foldable case is not a slab case with a bend in it. The hinge adds a moving part, a gap that collects grit, and a surface no rigid material can cover. Every range below is built around that constraint first and styled second.

22Ranges in production
200xHinge cycle tested
Fold 1–8Generations tooled
20–35 dNew chassis tooling
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All 27 ranges in production

Click through for full specifications, colourways and model coverage.

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What actually fails on a foldable case

Almost every foldable case complaint traces back to one of four things. All four are engineering problems, not material quality problems.

FailureCauseWhat we do
Hinge cover peels at the edgesFlex section bonded to a rigid half with poor adhesionBonded flex between two rigid halves, 200-cycle tested before a run
Phone will not close flushCase 0.2 mm too thick on one faceClosing-face tolerance held on every mould; all hardware kept off that face
Leather cracks at the foldLeather used as the load-bearing layer across the hingeLeather on the two rigid faces only; a flex material crosses the fold
Magnets feel weakArray placed over the hinge, or panel too thick above itArray routed into the lower back panel, panel held to 1.2 mm over the zone

The hinge cover cannot seal the gap — no case can, because the phone must still fold. What it does is shelter the gap so pocket lint, sand and crumbs cannot drop straight into the mechanism.

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Match the range to what the buyer is selling

BuyerRangeReason
Wants MagSafe accessories on a foldableMagnetic foldable, ice-feel magnetic, gold clear magneticN52 array clear of the hinge, up to 15 W
Wants a stand that survives an open phoneRotating foldable, gold gloss rotating, 3D standLockable detents spread load; a free-spinning ring collapses under an open foldable
Carries an S Pen dailyCard & pen slot, gold armor pen slot, gold eye pen slotChannel along the spine, clear of the flex
Wants premium surface for photographyLeather card, AG matte, gold silk, gold shineFinishes that read as premium and take debossing or plating
Privacy on the cover displayHD clear privacy, privacy magnetic28° tempered privacy layer, ≈68% head-on transmission
Slimmest possibleDiamond minimalNo hardware on the back panel, cleanest flush closing
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Frequently asked

Does every foldable case need hinge protection?

No, but without it the hinge gap collects debris, and debris is the main cause of hinge wear. For a phone that lives in a pocket or bag, coverage is worth the cost.

Can a leather case cover the hinge?

Not with leather alone — it does not elongate and will crack. Ask any supplier which material crosses the fold.

Why does a foldable case cost more than a slab case?

More parts, tighter tolerances, a flexible hinge section and more assembly steps. Tooling is more complex and takes longer.

Do you support older Fold generations?

Yes. Fold 1–3 moulds are still in service on the diamond ring stand and diamond minimal ranges.

Need foldable case pricing?

Send the exact models and quantity. We confirm mould availability the same day.

Send Your Enquiry
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Dongguan Zhongyi Technology Co., Ltd.

No. 31 Xinliao Road, Dongkeng Town
Dongguan, Guangdong, China
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