wind deflecting plates of an air conditioning grille include flexible plates are made of a thermoplastic material , so that they may bend to smoothly change the direction of wind when the deflecting plates are swung , and front and rear supports for the flexible plates . the material for the front and rear supports is of the same type as the material for the flexible plate and has a melting point close to that of the flexible plate but a hardness and stiffness different from the material of the flexible plate . the supports support the associated flexible plate at the windward and leeward ends thereof , respectively , and urge the flexible plate when bent to return to the flat state . at the end surface facing a blower rotor , the rear support has an arc portion having a shape corresponding to the outer surface of the rotor .