| CPC G06F 1/1681 (2013.01) [G06F 1/1616 (2013.01); G06F 1/1652 (2013.01); G06F 3/0412 (2013.01); H04M 1/0268 (2013.01)] | 20 Claims |

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1. An electronic device comprising:
a first housing;
a second housing configured to move relative to the first housing;
a display disposed in the first housing and the second housing; and
a hinge module connecting the first housing and the second housing to be rotatable from a folded state to an unfolded state,
wherein the hinge module includes:
a first rotation member connected to the first housing;
a second rotation member connected to the second housing;
a rotation bracket in which the first rotation member and the second rotation member are disposed;
a first arm member connected to the first rotation member and including a first cam structure;
a second arm member connected to the second rotation member and including a second cam structure; and
a third cam structure facing the first cam structure and the second cam structure, and
wherein each of the first cam structure and the second cam structure includes an outer cam structure having a first cam profile and an inner cam structure surrounded by the outer cam structure and having a second cam profile different from the first cam profile,
wherein the outer cam structure comprises an outer mountain portion and the inner cam structure comprises an inner mountain portion, and
wherein an apex of the outer mountain portion and an apex of the inner mountain portion are arranged within an angular range between the folded state to the unfolded state of the electronic device.
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