Ultrasonic sensor
AssigneeDenso Corporation
InventorsTetsuo Yoshioka, Makiko Sugiura, Yasuyuki Okuda, Takahiko Yoshida, Kazuaki Watanabe
Life of this patent
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Abstract
An ultrasonic sensor includes an ultrasonic detector for detecting an ultrasonic wave, an acoustic matching member joined to the ultrasonic detector, a housing in which the ultrasonic detector and the acoustic matching member are accommodated, a vibration isolator located between the acoustic matching member and an inner side wall of the housing to damp an unwanted vibration from outside, and a cushion member located between the ultrasonic detector and an inner bottom wall of the housing to absorb external force applied to the ultrasonic sensor The cushion member is not in contact with the acoustic matching member.
Claims19
An ultrasonic sensor comprising:
- at least one ultrasonic detector configured to detect an ultrasonic wave reflected from a target to be detected;
- at least one acoustic matching member having a mounting surface to which the ultrasonic detector is mounted and a receiving surface opposite to the mounting surface and exposed to space where the target exists to receive the reflected ultrasonic wave, the acoustic matching member being configured to transfer the reflected ultrasonic wave received at the receiving surface to the ultrasonic detector mounted to the mounting surface;
- a housing that accommodates the ultrasonic detector and the acoustic matching member and has an opening through which the receiving surface of the acoustic matching member is exposed to the space, the housing being mountable to an object that uses the ultrasonic sensor;
- a vibration isolator located between the acoustic matching member and a first portion of an inner side wall of the housing to fix the acoustic matching member to the housing, the first portion of the inner side wall being located near the opening, the vibration isolator being configured to damp a vibration transferred from the object to the acoustic matching member;
- a protection cover that covers a surface of the ultrasonic detector to protect the ultrasonic detector from a usage environment factor;
- and
- a cushion member configured to protect the ultrasonic detector from external force,
- wherein the cushion member includes at least one of a first cushion member and a second cushion member,
- wherein the first cushion member is located between the ultrasonic detector and an inner bottom wall of the housing, and
- wherein the second cushion member is located between the ultrasonic detector and a second portion of the inner side wall of the housing.
Dependencies are inferred from the claim text.