Patent ID: 6903694

Claim:
An antenna unit using a helical hinge spring which is used in a portable terminal including (A) a main housing, (B) a sub housing, and (C) a hinge module rotatably opening and closing the sub housing from and into the main housing and including a hinge shaft having one end fixedly attached to the main housing and the other end positioned within the sub housing and serving to interconnect the main housing and the sub housing, a hinge cam being slid by the hinge shaft and moving forward and backward, the helical hinge spring providing a force for closely adhering the hinge shaft to the hinge cam, and a hinge housing for accommodating the hinge shaft, the hinge cam, and the helical hinge spring, said antenna unit comprising: (a) the helical hinge spring disposed in a direction of a hinge axis and serving as a helical antenna; and (b) a conductive member including a contact portion disposed between the helical hinge spring and the hinge cam and closely adhered to the helical hinge spring, and a center portion extending from a center of the contact portion in the direction of the hinge axis and passing through the hinge cam and the hinge shaft.