Collapsible, flattenable and drum wrappable type of radio antenna, particularly for motor-vehicles and moving equipments

A collapsible stylus type of antenna comprising a housing having an opening, a drum rotatably mounted in the housing for rotation about an axis orthogonally disposed relative to said opening, a receiver stylus coiled in the housing for projection therefrom through the opening into an elongated form, said stylus comprising a band preformed around its longitudinal axis according to a curved shape so as to assume a substantially tubular configuration in cross-section in the absence of stress when in a position extended from the housing, said band being sufficiently resilient so as to be opened into a flat state and wound in such state on the drum, a fixed guide element provided internally of the housing adjacent the opening therein over which the band passes and which engages the band to prevent bowing of the band at such position, said fixed guide element including an outer guide element extending from a point adjacent the discharge of said flat band from said drum to said opening and further including an inner guide element extending from adjacent an upper portion of said drum and through a portion of said opening in said housing to guide said flat band into a substantially tubular configuration, means carried by the housing and arranged in spaced relation around the drum for limiting band sliding frictions with respect to the housing and fixed surfaces interposed with said means to promote a correct superimposition of the band spirals on and off the drum, and a series of idler rollers carried by the housing at the area of the opening to promote the changing of the band from one shape to another.