| 摘要 |
A vibration plate and cushioning plate are arranged, as a layered structure, within a drum shell in that order as viewed from the inner bottom of the drum shell toward a batter head with a vibration sensing/electric signal producing sensor attached to the vibration plate. A cushioning member is located within the drum shell to elastically support the cushioning plate between the inner bottom surface of the drum shell and the vibration plate. The cushioning member includes an externally urging section for externally urging the vibration plate toward the drum shell and an elastic support section which, when receiving an external strike force exceeding a predetermined value, is elastically deformed toward the inner bottom surface of the drum shell.
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