A lid, door, or cover has to pull itself closed, stay shut without rattling, and open with a defined, repeatable force. The conventional stack — a spring, a detent, and a mechanical latch — is parts, noise, wear, and a "feel" you tune by trial and error.
One coded magnet, three behaviors
A Spring-Latch Polymagnet handles all three. The coded face attracts across the last gap to soft-close the cover, then holds it firmly shut. A Spring variant does the opposite where you need it — attracting at a distance but repelling below about a centimeter, giving non-contact springiness or a controlled push-open. Because you're shaping the force curve with the pattern, you tune the feel instead of accepting whatever a steel spring gives you.
What that buys the design
- Fewer parts — no spring, detent, or catch to source and assemble.
- Silent and wear-free — no metal-on-metal contact.
- Tunable — set hold force and engagement gap to the feel you want.
- Sealed-friendly — works through a thin wall, so nothing has to penetrate a gasket.
You stop tuning springs and start specifying a force curve.
What to specify
| Function family | Spring-Latch (hold) and/or Spring (repel) |
| Engagement gap | Set for your wall thickness / travel |
| Pairing | Matched pair across the closure |
| Material | NdFeB (N50), Ni-Cu-Ni; to 60°C |
This is core magnetic latch design and magnetic-spring territory — closures, access panels, battery doors, and soft-close drawers.
See the behavior for yourself
It's hard to believe until it's in your hand. Order a demo kit, design your pattern, or talk to an application engineer about a custom force curve.
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