Abstract: A retractable antenna device includes a flexible antenna composed of a coiled antenna conductor covered with an inner antenna cover, a tubular outer antenna case telescopically assembled with the inner antenna case for sliding movement of the flexible antenna relative the outer antenna case, a tension coil spring formed of an electrically conductive material and connected between the coiled antenna conductor and the outer antenna case, and holding means disposed on the base of the flexible antenna for holding the flexible antenna against displacement relative to the outer antenna case. With this construction, when the flexible antenna is pulled out from, or retracted into, the outer antenna case, the tension coil spring is extended or contracted. The coil spring, as it is contracted, serves as a short antenna coil so that the necessary antenna characteristics can be maintained even when the flexible antenna is received inside the antenna case.

Abstract: This invention provides an antenna device of the type including a main antenna composed of a retractable flexible antenna, wherein the main antenna is slidably received in a tubular antenna case, a coil spring composed of a conductor is connected at one end to a base of the main antenna and, at an opposite end, to the antenna case, and holding means disposed on the base of the main antenna for holding the main antenna against displacement. With this arrangement, when the main antenna is retracted in the antenna case, the coil spring is contracted. The contracted coil spring serves as a short antenna coil so that the necessary antenna characteristics can be maintained even when the main antenna is received inside the antenna case. The antenna device can be transported while it is received in a pocket or the like of the user, with the main antenna kept in a retracted position, and with its receiver function kept in an activated condition.