Patent ID: 8876299

Claim:
An electronic device comprising: a case; a stern-shaped leg; and a leg fixing part that is a hole, which is formed in one face of the case and into which the leg is inserted, and that includes a case thread ridge portion formed on an inside face of the hole; wherein a peripheral face of a stem portion of the leg has a first screw structure portion, which includes a plurality of laps of continuous thread ridge that can be engaged with the case thread ridge portion, and a second screw structure portion, which includes a thread ridge at a same screw pitch as the first screw structure portion and which is engaged with the case thread ridge portion before being engaged with the first screw structure portion when the leg is inserted into the hole, wherein the case thread ridge portion is divided into isolated portions, and wherein the second screw structure portion has: a guide portion for guiding the case thread ridge portion to the second screw structure portion in such a way that the second screw structure portion passes through the case thread ridge portion when the leg is inserted into the hole while being turned in a direction in which the leg enters the case; and an idle turn inducing portion for turning the second screw structure portion idly with respect to the case thread ridge portion in such a way that the second screw structure portion does not pass through the case thread ridge portion when the leg is turned in a direction in which the leg is taken out of the case.