Arm structure, hinge structure including arm structure, and electronic device including hinge structure

An arm structure of an electronic device is provided. The arm structure comprises an arm body; a first cam disposed on one side of the arm body and including a first hole into which at least a portion of a rotation shaft providing a folding operation of the electronic device is inserted, a peak portion and a valley portion being formed around the first hole; a second cam arranged side by side on the same axis as the one side of the arm body, spaced apart from the first cam, and including a second hole into which at least a portion of the rotating shaft is inserted, a peak portion and a valley portion being formed around the second hole; and a connecting part provided on the other side of the arm body and fastened to a rotating part providing rotation of the electronic device. 提供了一种电子设备的臂结构。该臂结构包括：臂体；第一凸轮，该第一凸轮被设置在臂体的一侧上并且包括第一孔，提供电子设备的折叠操作的旋转轴的至少一部分被插入到该第一孔中，峰部和谷部围绕第一孔形成；第二凸轮，该第二凸轮在与臂体的所述一侧相同的轴线上并排布置，与第一凸轮间隔开，并且包括第二孔，旋转轴的至少一部分被插入到该第二孔中，峰部和谷部围绕第二孔形成；以及连接部，该连接部被设置在臂体的另一侧上并且与提供电子设备的旋转的旋转部紧固。