| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress erroneous detection due to noise vibrations caused by beating other drum boards. <P>SOLUTION: A sensor attachment substrate 12 is disposed on a substrate holding plate 11 fixed to an arm 10. A beat sensor 13 is disposed on a lower face of the sensor attachment substrate 12. A lower elastic washer 16 is disposed on a receiving member 15 fixed to a base end part of a constricted diameter part 10a of the arm 10. A fastening tool 18 is tightened to hold a cymbal type drum board body 21 in a state of being interposed between an upper elastic washer 17 and the lower elastic washer 16. When the drum board body 21 is not beaten, a free end part 12a of the sensor attachment substrate 12 is brought close to a driving part 21c of the drum board body 21 with a space C1 between them without contacting; and when the drum board body 21 is beaten, the free end part 12 can be brought into contact with the driving part 21c. <P>COPYRIGHT: (C)2008,JPO&INPIT |
