| 摘要 |
<p>A percussion instrument includes a drum body (13) and a percussion head (19) movable with respect to and stretched over therdrum body (13). A master tensioning member (55) is provided for pulling the drumhead (19) downward to enable a musician to vary the pitch of the sound produced when the drumhead (10) is struck. The master tensioning member (55) is operatively coupled to the drumhead (19) and is adaptable for use with drumheads of varying size. A lever system (Fig 3) is provided for moving the master tensioning member vertically downwardly. A foot pedal (336) is provided for enabling the user to actuate the lever system. The pedal (336) includes an engaging tooth (182) and is swivel- able to engage and disengage the tooth with complementary teeth to lock the pedal (336) selectively in position. The pedal tooth thereby permits the user to adjust and fix the tension on the drumhead. The pedal is connected to the lever system by a movable fulcrum, (252, 258) which permits the user to exert a smooth, even force when depressing the pedal and actuating the lever system.</p> |
