| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ultrasonic sensor that is capable of ensuring waterproofness without increasing the number of components, suppressing an increase in weight and cost, and preventing occurrence of distortion in a circuit board. <P>SOLUTION: An ultrasonic sensor comprises: a wave transmitting and receiving block 1 for housing a wave transmitting and receiving element for transmitting and receiving an ultrasonic wave; a circuit board 3 on which an electronic circuit for processing an ultrasonic signal transmitted and received via the wave transmitting and receiving element is mounted; and a housing 4 that includes an opening 40A and is provided with a housing part 40 for housing the circuit board 3. The opening 40A of the housing part 40 is closed by the wave transmitting and receiving block 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
