Apple's new patent for foldable iPhone approved: built-in spring layer to relieve folding pressure and external impact

According to news on April 17, according to a list recently announced by the United States Trademark and Patent Office (USPTO), Apple has obtained a patent for a foldable screen mobile phone, focusing on the introduction of a new spring layer concept to reduce pressure when folding.

Apple states that the spring layer is composed of a metal spring array, and then sensors such as force sensing structures (such as strain gauges) are embedded in the spring layer. In addition, the patent also states that if necessary, it can Foam columns and other compressible structures are interspersed with springs to help tailor the performance of the spring layers. The spring layer can be made of various flexible metals, such as spring steel, nickel-chromium aluminum alloy, beryllium copper alloy, stainless steel, cobalt-nickel alloy and other spring metals. Attached are the relevant pictures as follows: Apple stated that the introduction of spring layers into folding screen devices can, on the one hand, ease the On the other hand, it can also alleviate the stress on the screen during repeated folding and unfolding, thus improving the durability of foldable screen devices. Apple believes this spring layer can relieve external pressure and prevent excessive local deformation. via：patentlyapple

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