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Last updated: May 4th, 2021 at 13:28 UTC+02:00
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Besides developing the foldable display itself, one of the biggest difficulties faced by Samsung when designing its foldable devices was to make the hinge as impervious to foreign particles as possible. First, Samsung had to create a hinge that was small enough to fit inside the Galaxy Z Flip 2 without compromising the design, and after dozens of versions tested, the company has settled on the final Hideaway Hinge design that comprises more than 60 small components.
Next, the company had to come up with a way to protect all those intricate mechanisms from dust and other foreign particles, and the company found the answer in one of the most unexpected places: its vacuum cleaner lineup.
Samsung has revealed that it went through 98 different ideas of how to protect the intricate mechanical hinge of the Galaxy Z Fold 2, and none of these initial concepts worked. It must've been frustrating for Samsung to have this state-of-the-art display technology on its hands and yet be held back by a hinge mechanism, but thankfully the engineering team pulled through.
The team drew inspiration from the most unlikely place, namely the company's household vacuum cleaners, and has developed the sweeper mechanism for the Hideaway Hinge. It's made of fibers that are shorter than 1mm, and it meets three key requirements: it's durable-enough to withstand 200,000 folds; it can maintain elasticity; and it's small enough not to compromise the Galaxy Z Fold 2's design.
This was an ingenious solution to a big problem, and indeed, the Galaxy Z Fold 2 is a lot more successful than the original model at keeping dust particles from infiltrating the device and breaking the foldable screen from the inside. But it is not perfect. There have been reports from a few Galaxy Z Fold 2 owners about the hinge getting stuck / clogged up, so it's going to be interesting to see how Samsung will further evolve upon the hinge mechanism for the Galaxy Z Fold 3.
Mihai is a blogger and column writer at SamMobile. His first Samsung phone was an A800 which took a lot of beating, and a part of him still misses the novelty of the clamshell design. In his free time, he enjoys watching shows, documentaries, and stand-up comedy; listening to music, taking walks, and occasionally playing old(er) video games.