Ultrasonic sensor
AssigneeDenso Corporation
InventorAkira Nakajima
Life of this patent
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Abstract
An ultrasonic sensor consists of an ultrasonic transducer and a casing. The transducer includes a metal-made housing having an inner space; a vibrating planar member formed in the housing, wherein an outward surface of the vibrating planar member constitutes an outward surface of the housing and an inward surface of the vibrating planar member faces the inner space; and a driving element attached on an inward surface of the vibrating planar member for vibrating the vibrating planar member. This ultrasonic transducer is assembled within the casing and attached to a vehicle via the casing with the outward surface of the vibrating planar member exposed outwardly. Further, a resin film is attached using an adhesive member applied on a rear surface of the film to cover all the outward surface of the vibrating planner member.
Claims14
An ultrasonic sensor comprising:
- an ultrasonic transducer including
- a metal-made housing that includes an inner space,
- a vibrating planar member that is formed in the housing, wherein an outward surface of the vibrating planar member constitutes an outward surface of the housing and an inward surface of the vibrating planar member faces the inner space;
- a driving element that is attached on an inward surface of the vibrating planar member for vibrating the vibrating planar member;
- a casing within which the ultrasonic transducer assembled, wherein at least the outward surface of the vibrating planar member is exposed from the casing;
- and
- a vibration isolating member that is located between the casing and the ultrasonic transducer for limiting transmission of vibration from the transducer to the casing,
- wherein the ultrasonic transducer is attached to a vehicle via the casing so that the outward surface of the vibrating planar member faces to the outside of the vehicle,
- wherein a resin film is attached using an adhesive member applied on a rear surface of the resin film to cover all the outward surface of the vibrating planar member, and
- wherein a size of the resin film is equal to or larger than a size of the outward surface of the vibrating planer member, and the resin film dies not contact the casing located outside of the ultrasonic transducer.
An ultrasonic sensor comprising:
- an ultrasonic transducer, wherein the ultrasonic transducer includes a metal housing, which includes an inner space, a driving element, which is located within the inner space, and a vibrating planar member, which is formed in the housing, wherein
- the vibrating planar member has an inner surface, which faces the driving element, and an outer surface, which is opposite to the inner surface and which faces away from the driving element, and
- the driving element is attached directly to the inner surface of the vibrating planar member for vibrating the vibrating planar member;
- and
- a casing within which the ultrasonic transducer is assembled, wherein the outer surface of the vibrating planar member is exposed to an outside of the casing, wherein
- the ultrasonic transducer is adapted to be attached to a vehicle via the casing so that the outward surface of the vibrating planar member faces away from the vehicle, and
- a resin film is adhered directly to the outer surface of the vibrating planar member such that the vibrating planar member is between the resin film and the driving element to cover and protect the entire outer surface of the vibrating planar member and wherein a size of the resin film is equal to or larger than a size of the outer surface of the vibrating planar member, and the resin film does not contact the casing located outside of the ultrasonic transducer.
Dependencies are inferred from the claim text.