Some inventions struggle because they're too complicated to explain. The V-Lock, on the other hand, is gonna do great, because it's instantly understandable even without an explanation, hugely useful and forehead-slappingly simple. Everyone who's ever unlocked a door in the dark will understand the problem and designer Junjie Zhang's clever solution in a flash. We love it and we'll take a dozen please.

Via: Yanko Design.