Patent ID: 7522474

Claim:
An ultrasonic sensor comprising: a bezel in a pipe shape with an opening on one end and a hollow space housed therein; a sensor body having an insertion portion with an ultrasonic transducer disposed therein; and a spring, said spring being made of metal, wherein the bezel has a side wall having an opening of a through hole that connects an outside of the bezel and the hollow space, the side wall of the bezel has the spring disposed at a position of the through hole, insertion of the bezel into a hole portion of a vehicle component from an outside of the component accompanied by having the insertion portion of the sensor body being inserted from an inside of the component into the hollow space of the bezel causes a compressive deformation condition of the spring positioned between an outer wall of the insertion portion and a wall face of the hole portion, the spring is initially compressively deformed toward a center of the hole portion by the wall face of the hole portion when the bezel is inserted into the hole portion of the vehicle component. the spring is then compressively deformed toward an outside of the hole portion at a position between the outer wall of the insertion portion and the wall face of the hole portion when the insertion portion of the sensor body is inserted into the hollow space of the bezel, and the compressive deformation condition of the spring generates a reactive force of the spring that resiliently attaches the sensor body and the bezel on the wall face of the hole portion of the component.