| 摘要 |
An enhanced bass drum pedal is provided with an eccentricity-adjustable cam system comprising a cam core mounted on a rotating shaft, a cam member rotatably connected to the cam core by a first pin, a positioning member rotatably connected to the cam member by a second pin, and a set screw. The positioning member is fastened onto the cam core by the set screw at a selected position of the positioning member to adjust the eccentricity of the cam system relative to the axis of rotation. As a result, a user can readily alter the impact force acted on a drum head and the restoring force applied to the foot board thereby tuning the bass drum pedal to suit the user's playing style and ability.
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