Patent ID: 7436367

Claim:
An antenna for mounting on a motor-vehicle part formed with a throughgoing hole of nonround shape, the antenna comprising: a base plate engageable with the part over the hole; antenna components mounted on the base plate; a stem fixed in the base plate and projecting along an axis through the hole and having an outer end; a bayonet plate having an outer edge of nonround shape capable of passing axially through the hole of the part in an aligned position and not able to pass through the hole of the part in another angularly offset nonaligned position; support means supporting the bayonet plate on the base plate for angular movement of the bayonet plate relative to the base plate about the axis between an install position and a holding position; a spring braced between the stem outer end and the bayonet plate and urging the bayonet plate axially toward the base plate and against the part; and spacer formations on the bayonet plate and base plate engageable with each other in the install position of the base plate and bayonet plate to hold the bayonet plate in an outer position at a predetermined large axial spacing from the base plate and disengaging from each other in the angularly offset holding position to allow the bayonet plate to be pressed by the spring into an inner position very closely juxtaposed with the base plate and tightly gripping the motor-vehicle part between the bayonet plate and the base plate.