Over the years, Apple has been issued various patents for the design of foldable devices, but it is yet to actually produce one (and its first foldable keeps getting delayed). The latest patent (issued today) is US 12,164,344 or “Hinges for folding display devices”. The patent describes a series of interconnected links that are formed from interlinked “fingers” and a friction clutch. A key part of the patent is using crescent-shaped slots, which allow each link to rotate relative to others – crucially, this moves the axis of rotation outside of the link itself. Schematics from...
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