Radio receiver apparatus for vehicle

A radio receiver apparatus for a vehicle, comprising:

• an antenna device, having a projectable antenna element for receiving broadcast waves, attached to said vehicle in a position separate from a passenger compartment thereof;
• a radio receiver, coupled to said vehicle adjacent to said antenna device, including a tuning circuit having an input terminal;
• a connecting member for connecting said input terminal to said antenna device;
• an operating section, provided inside the passenger compartment, for sending operation control signals, which include tuning control signals, to said radio receiver;
• a transmission line, connected between said separated radio receiver and said operating section, for carrying the control signals to said radio receiver thereby controlling said radio receiver;
• a field detection wire, provided inside the vehicle, for generating a field detection signal having a level corresponding to the strength of a broadcast wave field;
• and
• means, responsive to said field detection signals, for reducing the level of a signal from said antenna element, which is coupled to said radio receiver.

A radio receiver apparatus for an automotive vehicle having a vehicle body and a passenger compartment comprising:

• a radio receiver including a tuning circuit and a control unit for operating said tuning circuit in response to command tuning signals coupled thereto;
• an antenna for receiving a broadcast signal
• including a means for extending or retracting said antenna and a metallic telescopic rod;
• said means for extending or retracting said antenna including,
• a flexible dielectric cable of a predetermined rigidity, being mounted on an end of said rod,
• a reel having said cable wound around said reel,
• a first gear mounted to said reel,
• a second gear meshing to said first gear,
• a motor driving said second gear so that upon actuation of said motor, said metallic rod is extended upward or downward;
• a first housing containing said receiver;
• a second housing for containing said antenna said first and second housings forming a single unit;
• said housings having a common aperature;
• an elastic metal contact member connecting said antenna to said receiver through said aperture;
• a broadcast wavefield detection wire, coupled to said vehicle body, having a resistor interposed serially therewith so that a voltage portional to a broadcast wavefield is developed across said resistor;
• means for reducing the strength of said received broadcast signal delivered to said tuning circuit, said means being actuated when a predetermined voltage level is present at said resistor;
• an operating control unit mounted within said passenger compartment for generating said command tuning signals and for extending or retracting said antenna;
• means for coupling said command signals to said receiver and said extending/retracting means thereby remotely controlling same.