| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that output of a piezoelectric sensor is small, in the piezoelectric sensor for detecting contact of an object or a catching preventive device for detecting catching of the object into an opening/closing portion by using the piezoelectric sensor. <P>SOLUTION: The piezoelectric sensor 8 is arranged so as to be opposite to rubber (an elastic element) 9 that is hollow or has a slit 33, or arranged so as to form displaceable areas 36, 38, 39 between supporting portions 35, 35a, 35b. Therefore, the displacement L of the piezoelectric sensor 8 occurring by contact of the article 10 is made to be large, thereby increasing output. <P>COPYRIGHT: (C)2004,JPO |
