Computing devices such as laptops utilize hinges to connect the lid of the device to its base. This disclosure describes a press-fit hinge mechanism for use in conjunction with magnesium alloy based enclosures that are utilized to attach a computing device lid to its base. The press-fit hinge mechanism includes a knurled shaft designed to be inserted into a magnesium alloy based enclosure. The teeth and lead-in chamfer geometry of the knurled shaft are designed to control the interference between the knurls and enclosure opening. A straight knurl pattern is utilized for ease of manufacture, and provides for better material flow via ridges of the knurled shaft, a lower insertion force, and a higher torsional resistance. The press-fit hinge mechanism enables tighter assembly tolerances, smaller assembly gaps and improved appearance for the device.
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McShane, Molly; Tshweneyagae, Karabo; Fox, Eugene; and Hsu, Roger, "Press-fit hinge and magnesium alloy enclosure for laptop cover attachment", Technical Disclosure Commons, (October 30, 2019)