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crwdns2933797:0Jeff Suovanencrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Jeff Suovanen

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-[* black] Now that we got all those boring components out of the way, we can get to the good stuff: the empty frame!
+[* black] Here's something you don't usually see on a smartphone teardown: mechanical parts. Big ones!
[* black] The folding act of this Razr comprises a continuous geared hinge, a cat-head cam, two support plates, and a few springs.
-[* black] [https://patents.google.com/patent/US10054990B1/en|Motorola's|new_window=true] [https://patents.google.com/patent/US10491725B1/en|patents|new_window=true] [https://patentimages.storage.googleapis.com/bd/5d/a6/4f78394e11148b/US10491725-20191126-D00005.png|illustrate|new_window=true] the way the cam and the support plates work together to protect the fragile OLED display. They provide support and hold it taut while the phone is open, then allow room for a generously loose fold (which helps to prevent a crease in the display from forming) when it shuts.
-[* black] In the close-up x-ray of the middle of the phone, you can see the continuous geared hinge as well as the springs.
+[* black] [https://patents.google.com/patent/US10054990B1/en|Motorola's|new_window=true] [https://patents.google.com/patent/US10491725B1/en|patents|new_window=true] [https://patentimages.storage.googleapis.com/bd/5d/a6/4f78394e11148b/US10491725-20191126-D00005.png|illustrate|new_window=true] the way the cam and the support plates work together to protect the fragile OLED display. They provide support and hold it taut while the phone is open, then get out of the way to allow for a nice big radius (which helps to prevent a crease in the display from forming) when it shuts.
+[* black] In X-ray closeups of the hinge area, you can see the continuous geared hinge as well as the [https://d3nevzfk7ii3be.cloudfront.net/igi/IybXjKTDAyqERhME.full|springs|new_window=true] embedded in each side of the frame.
[* icon_note] The gears keep both halves of the phone moving synchronously, very similar to the gears in the [guide|122600|Galaxy Fold|stepid=236283|new_window=true].
[* icon_note] The springs in each half of the phone press inward against the cam in the middle to hold the phone [https://patentimages.storage.googleapis.com/30/54/44/8df1ad6521dee3/US10054990-20180821-D00005.png|open|new_window=true] or [https://patentimages.storage.googleapis.com/b5/d1/96/108ac49bb70112/US10054990-20180821-D00004.png|closed|new_window=true], and provide some resistance when moving the hinge.