Wired
According to a list published by the United States Trademark and Patent Office (USPTO), Apple has obtained an innovative patent for a foldable screen mobile phone. The patent focuses on a new spring layer concept designed to reduce pressure when folding, thereby significantly Enhance device durability.
Apple’s patent describes the composition of this spring layer in detail. It is mainly composed of a metal spring array and is embedded with sensors such as force sensing structures (such as strain gauges). The patent also says that if necessary, foam columns and other compressible structures could be interspersed with the springs to help tune the performance of the spring layers.
This spring layer can be made of a variety of flexible metals, such as spring steel, nickel-chromium aluminum alloy, beryllium copper alloy, stainless steel, cobalt-nickel alloy, etc.
Apple said that the introduction of spring layer design into folding screen devices can not only relieve the pressure of the device when it is impacted, squeezed and other external events, but can also effectively reduce the stress generated by the screen during repeated folding and unfolding processes, thereby significantly Improve the durability and service life of foldable screen devices.
Apple also emphasized that the design of this spring layer can effectively relieve external pressure and prevent excessive local deformation of the device.
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