Just hours after publishing my deep dive into Garmin’s new patents for fitting LTE and satellite tech into metal cases, I went back to double-check the USPTO database and uncovered yet another fascinating filing. Published on October 6, 2026, a fresh patent number US-12754590-B2 reveals how Garmin is completely reimagining the physical watch crown to make future wearables virtually leak-proof.
The Hidden Vulnerability of Traditional Watch Crowns
Traditional smartwatches with rotating crowns have a built-in vulnerability because the mechanical shaft has to physically poke right through the watch housing to reach an internal sensor. Over time, under heavy sweat, deep dives, or high water pressure, those tiny gaskets and O-rings can degrade and let moisture seep inside. For rugged sports watches and dive computers, every extra hole in the case represents a potential point of failure.
A Completely Sealed Design Using Magnetic Tracking
Instead of punching a hole through the case, Garmin’s new patent, titled “Rotatable control button assembly for a wearable device”, keeps the entire button mechanism completely outside the watch housing. The external rotating crown features a contact head embedded with a small magnet. Meanwhile, the watch case features a continuous, unbroken metal or plastic sidewall that entirely separates the external button from the inside of the watch.
How Hall Effect Sensors Read Movement Through Metal
Safely tucked away inside the sealed housing is a Hall effect sensor. When you twist the crown outside, the internal magnet rotates, and the sensor reads those magnetic field changes right through the solid case wall. Because the case wall remains entirely unbroken, the internal electronics stay completely sealed off from water, dust, and high-pressure environments.
Snap Domes and Tactile Feedback
Garmin isn’t sacrificing functionality for waterproofing, as the patent also details a smart internal layout for button presses. Beneath the contact head sits a bi-stable snap dome. When pressed inward, it hits a mechanical threshold before snapping, giving you a satisfying, sharp click sensation even when you can’t hear or see it. Additionally, a built-in spring element automatically pushes the crown back out to its neutral position the moment you let go.
What This Means for Future Garmin Lineups
While not every patent makes it straight to production, this design points directly to Garmin’s ongoing push for bulletproof outdoor and dive hardware. A completely sealed, magnetic-tracking crown would give future sports watches the smooth scrolling of a mechanical crown with the impenetrable waterproof seal of a solid-walled case.
Also Read: Garmin Prime Day 2026: Why Most Deals Disappointed (And What’s Worth Buying)
