Patent attributes
Rear glass is provided with a radiation conductor and a ground conductor. An electronic circuit unit includes a base plate fixed on the rear glass; a frame body which houses a circuit substrate and is screwed on the base plate; and a cover for covering the frame body. The frame body and the cover are provided with drainage holes. These drainage holes are provided at the bottommost portion of the electronic circuit unit in a state where the electronic circuit unit is mounted on the rear glass. Furthermore, the frame body is provided with a plurality of tongue pieces that are bent in order to support the circuit substrate, and clearance holes provided for forming the tongue pieces. The clearance holes that are disposed in one of side walls of the frame body are used as drainage holes.
